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/*
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* Emulation of Linux signals
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <stdarg.h> |
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#include <unistd.h> |
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#include <signal.h> |
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#include <errno.h> |
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#include <assert.h> |
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#include <sys/ucontext.h> |
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#include <sys/resource.h> |
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#include "qemu.h" |
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#include "qemu-common.h" |
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#include "target_signal.h" |
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//#define DEBUG_SIGNAL
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static struct target_sigaltstack target_sigaltstack_used = { |
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.ss_sp = 0,
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.ss_size = 0,
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.ss_flags = TARGET_SS_DISABLE, |
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}; |
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static struct target_sigaction sigact_table[TARGET_NSIG]; |
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static void host_signal_handler(int host_signum, siginfo_t *info, |
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void *puc);
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static uint8_t host_to_target_signal_table[_NSIG] = {
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[SIGHUP] = TARGET_SIGHUP, |
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[SIGINT] = TARGET_SIGINT, |
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[SIGQUIT] = TARGET_SIGQUIT, |
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[SIGILL] = TARGET_SIGILL, |
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[SIGTRAP] = TARGET_SIGTRAP, |
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[SIGABRT] = TARGET_SIGABRT, |
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/* [SIGIOT] = TARGET_SIGIOT,*/
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[SIGBUS] = TARGET_SIGBUS, |
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[SIGFPE] = TARGET_SIGFPE, |
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[SIGKILL] = TARGET_SIGKILL, |
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[SIGUSR1] = TARGET_SIGUSR1, |
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[SIGSEGV] = TARGET_SIGSEGV, |
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[SIGUSR2] = TARGET_SIGUSR2, |
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[SIGPIPE] = TARGET_SIGPIPE, |
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[SIGALRM] = TARGET_SIGALRM, |
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[SIGTERM] = TARGET_SIGTERM, |
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#ifdef SIGSTKFLT
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[SIGSTKFLT] = TARGET_SIGSTKFLT, |
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#endif
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[SIGCHLD] = TARGET_SIGCHLD, |
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[SIGCONT] = TARGET_SIGCONT, |
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[SIGSTOP] = TARGET_SIGSTOP, |
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[SIGTSTP] = TARGET_SIGTSTP, |
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[SIGTTIN] = TARGET_SIGTTIN, |
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[SIGTTOU] = TARGET_SIGTTOU, |
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[SIGURG] = TARGET_SIGURG, |
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[SIGXCPU] = TARGET_SIGXCPU, |
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[SIGXFSZ] = TARGET_SIGXFSZ, |
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[SIGVTALRM] = TARGET_SIGVTALRM, |
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[SIGPROF] = TARGET_SIGPROF, |
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[SIGWINCH] = TARGET_SIGWINCH, |
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[SIGIO] = TARGET_SIGIO, |
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[SIGPWR] = TARGET_SIGPWR, |
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[SIGSYS] = TARGET_SIGSYS, |
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/* next signals stay the same */
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/* Nasty hack: Reverse SIGRTMIN and SIGRTMAX to avoid overlap with
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host libpthread signals. This assumes noone actually uses SIGRTMAX :-/
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To fix this properly we need to do manual signal delivery multiplexed
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over a single host signal. */
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[__SIGRTMIN] = __SIGRTMAX, |
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[__SIGRTMAX] = __SIGRTMIN, |
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}; |
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static uint8_t target_to_host_signal_table[_NSIG];
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static inline int on_sig_stack(unsigned long sp) |
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{ |
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return (sp - target_sigaltstack_used.ss_sp
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< target_sigaltstack_used.ss_size); |
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} |
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static inline int sas_ss_flags(unsigned long sp) |
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{ |
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return (target_sigaltstack_used.ss_size == 0 ? SS_DISABLE |
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: on_sig_stack(sp) ? SS_ONSTACK : 0);
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} |
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int host_to_target_signal(int sig) |
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{ |
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if (sig >= _NSIG)
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return sig;
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return host_to_target_signal_table[sig];
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} |
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int target_to_host_signal(int sig) |
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{ |
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if (sig >= _NSIG)
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return sig;
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return target_to_host_signal_table[sig];
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} |
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static inline void target_sigemptyset(target_sigset_t *set) |
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{ |
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memset(set, 0, sizeof(*set)); |
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} |
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static inline void target_sigaddset(target_sigset_t *set, int signum) |
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{ |
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signum--; |
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abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW);
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set->sig[signum / TARGET_NSIG_BPW] |= mask; |
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} |
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static inline int target_sigismember(const target_sigset_t *set, int signum) |
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{ |
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signum--; |
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abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW);
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return ((set->sig[signum / TARGET_NSIG_BPW] & mask) != 0); |
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} |
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static void host_to_target_sigset_internal(target_sigset_t *d, |
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const sigset_t *s)
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{ |
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int i;
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target_sigemptyset(d); |
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for (i = 1; i <= TARGET_NSIG; i++) { |
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if (sigismember(s, i)) {
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target_sigaddset(d, host_to_target_signal(i)); |
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} |
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} |
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} |
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void host_to_target_sigset(target_sigset_t *d, const sigset_t *s) |
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{ |
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target_sigset_t d1; |
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int i;
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host_to_target_sigset_internal(&d1, s); |
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for(i = 0;i < TARGET_NSIG_WORDS; i++) |
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d->sig[i] = tswapl(d1.sig[i]); |
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} |
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static void target_to_host_sigset_internal(sigset_t *d, |
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const target_sigset_t *s)
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{ |
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int i;
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sigemptyset(d); |
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for (i = 1; i <= TARGET_NSIG; i++) { |
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if (target_sigismember(s, i)) {
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sigaddset(d, target_to_host_signal(i)); |
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} |
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} |
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} |
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void target_to_host_sigset(sigset_t *d, const target_sigset_t *s) |
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{ |
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target_sigset_t s1; |
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int i;
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for(i = 0;i < TARGET_NSIG_WORDS; i++) |
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s1.sig[i] = tswapl(s->sig[i]); |
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target_to_host_sigset_internal(d, &s1); |
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} |
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void host_to_target_old_sigset(abi_ulong *old_sigset,
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const sigset_t *sigset)
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{ |
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target_sigset_t d; |
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host_to_target_sigset(&d, sigset); |
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*old_sigset = d.sig[0];
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} |
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void target_to_host_old_sigset(sigset_t *sigset,
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const abi_ulong *old_sigset)
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{ |
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target_sigset_t d; |
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int i;
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d.sig[0] = *old_sigset;
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for(i = 1;i < TARGET_NSIG_WORDS; i++) |
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d.sig[i] = 0;
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target_to_host_sigset(sigset, &d); |
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} |
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/* siginfo conversion */
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static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo, |
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const siginfo_t *info)
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{ |
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int sig;
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sig = host_to_target_signal(info->si_signo); |
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tinfo->si_signo = sig; |
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tinfo->si_errno = 0;
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tinfo->si_code = info->si_code; |
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if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
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sig == SIGBUS || sig == SIGTRAP) { |
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/* should never come here, but who knows. The information for
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the target is irrelevant */
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tinfo->_sifields._sigfault._addr = 0;
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} else if (sig == SIGIO) { |
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tinfo->_sifields._sigpoll._fd = info->si_fd; |
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} else if (sig >= TARGET_SIGRTMIN) { |
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tinfo->_sifields._rt._pid = info->si_pid; |
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tinfo->_sifields._rt._uid = info->si_uid; |
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/* XXX: potential problem if 64 bit */
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tinfo->_sifields._rt._sigval.sival_ptr = |
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(abi_ulong)(unsigned long)info->si_value.sival_ptr; |
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} |
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} |
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static void tswap_siginfo(target_siginfo_t *tinfo, |
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const target_siginfo_t *info)
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{ |
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int sig;
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sig = info->si_signo; |
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tinfo->si_signo = tswap32(sig); |
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tinfo->si_errno = tswap32(info->si_errno); |
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tinfo->si_code = tswap32(info->si_code); |
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if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
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sig == SIGBUS || sig == SIGTRAP) { |
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tinfo->_sifields._sigfault._addr = |
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tswapl(info->_sifields._sigfault._addr); |
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} else if (sig == SIGIO) { |
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tinfo->_sifields._sigpoll._fd = tswap32(info->_sifields._sigpoll._fd); |
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} else if (sig >= TARGET_SIGRTMIN) { |
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tinfo->_sifields._rt._pid = tswap32(info->_sifields._rt._pid); |
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tinfo->_sifields._rt._uid = tswap32(info->_sifields._rt._uid); |
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tinfo->_sifields._rt._sigval.sival_ptr = |
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tswapl(info->_sifields._rt._sigval.sival_ptr); |
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} |
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} |
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void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info) |
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{ |
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host_to_target_siginfo_noswap(tinfo, info); |
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tswap_siginfo(tinfo, tinfo); |
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} |
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/* XXX: we support only POSIX RT signals are used. */
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/* XXX: find a solution for 64 bit (additional malloced data is needed) */
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void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo) |
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{ |
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info->si_signo = tswap32(tinfo->si_signo); |
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info->si_errno = tswap32(tinfo->si_errno); |
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info->si_code = tswap32(tinfo->si_code); |
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info->si_pid = tswap32(tinfo->_sifields._rt._pid); |
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info->si_uid = tswap32(tinfo->_sifields._rt._uid); |
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info->si_value.sival_ptr = |
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(void *)(long)tswapl(tinfo->_sifields._rt._sigval.sival_ptr); |
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} |
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static int fatal_signal (int sig) |
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{ |
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switch (sig) {
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case TARGET_SIGCHLD:
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case TARGET_SIGURG:
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case TARGET_SIGWINCH:
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/* Ignored by default. */
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return 0; |
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case TARGET_SIGCONT:
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case TARGET_SIGSTOP:
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case TARGET_SIGTSTP:
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case TARGET_SIGTTIN:
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case TARGET_SIGTTOU:
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/* Job control signals. */
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return 0; |
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default:
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return 1; |
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} |
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} |
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/* returns 1 if given signal should dump core if not handled */
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static int core_dump_signal(int sig) |
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{ |
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switch (sig) {
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case TARGET_SIGABRT:
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case TARGET_SIGFPE:
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case TARGET_SIGILL:
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case TARGET_SIGQUIT:
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case TARGET_SIGSEGV:
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case TARGET_SIGTRAP:
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case TARGET_SIGBUS:
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return (1); |
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default:
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return (0); |
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} |
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} |
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void signal_init(void) |
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{ |
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struct sigaction act;
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struct sigaction oact;
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int i, j;
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int host_sig;
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/* generate signal conversion tables */
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for(i = 1; i < _NSIG; i++) { |
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if (host_to_target_signal_table[i] == 0) |
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host_to_target_signal_table[i] = i; |
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} |
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for(i = 1; i < _NSIG; i++) { |
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j = host_to_target_signal_table[i]; |
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target_to_host_signal_table[j] = i; |
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} |
322 |
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/* set all host signal handlers. ALL signals are blocked during
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the handlers to serialize them. */
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memset(sigact_table, 0, sizeof(sigact_table)); |
326 |
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sigfillset(&act.sa_mask); |
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act.sa_flags = SA_SIGINFO; |
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act.sa_sigaction = host_signal_handler; |
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for(i = 1; i <= TARGET_NSIG; i++) { |
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host_sig = target_to_host_signal(i); |
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sigaction(host_sig, NULL, &oact);
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if (oact.sa_sigaction == (void *)SIG_IGN) { |
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sigact_table[i - 1]._sa_handler = TARGET_SIG_IGN;
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} else if (oact.sa_sigaction == (void *)SIG_DFL) { |
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sigact_table[i - 1]._sa_handler = TARGET_SIG_DFL;
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} |
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/* If there's already a handler installed then something has
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gone horribly wrong, so don't even try to handle that case. */
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/* Install some handlers for our own use. We need at least
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SIGSEGV and SIGBUS, to detect exceptions. We can not just
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trap all signals because it affects syscall interrupt
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behavior. But do trap all default-fatal signals. */
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if (fatal_signal (i))
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sigaction(host_sig, &act, NULL);
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} |
347 |
} |
348 |
|
349 |
/* signal queue handling */
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350 |
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351 |
static inline struct sigqueue *alloc_sigqueue(CPUState *env) |
352 |
{ |
353 |
TaskState *ts = env->opaque; |
354 |
struct sigqueue *q = ts->first_free;
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if (!q)
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return NULL; |
357 |
ts->first_free = q->next; |
358 |
return q;
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359 |
} |
360 |
|
361 |
static inline void free_sigqueue(CPUState *env, struct sigqueue *q) |
362 |
{ |
363 |
TaskState *ts = env->opaque; |
364 |
q->next = ts->first_free; |
365 |
ts->first_free = q; |
366 |
} |
367 |
|
368 |
/* abort execution with signal */
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369 |
static void QEMU_NORETURN force_sig(int sig) |
370 |
{ |
371 |
TaskState *ts = (TaskState *)thread_env->opaque; |
372 |
int host_sig, core_dumped = 0; |
373 |
struct sigaction act;
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host_sig = target_to_host_signal(sig); |
375 |
gdb_signalled(thread_env, sig); |
376 |
|
377 |
/* dump core if supported by target binary format */
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378 |
if (core_dump_signal(sig) && (ts->bprm->core_dump != NULL)) { |
379 |
stop_all_tasks(); |
380 |
core_dumped = |
381 |
((*ts->bprm->core_dump)(sig, thread_env) == 0);
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382 |
} |
383 |
if (core_dumped) {
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384 |
/* we already dumped the core of target process, we don't want
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385 |
* a coredump of qemu itself */
|
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struct rlimit nodump;
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getrlimit(RLIMIT_CORE, &nodump); |
388 |
nodump.rlim_cur=0;
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setrlimit(RLIMIT_CORE, &nodump); |
390 |
(void) fprintf(stderr, "qemu: uncaught target signal %d (%s) - %s\n", |
391 |
sig, strsignal(host_sig), "core dumped" );
|
392 |
} |
393 |
|
394 |
/* The proper exit code for dieing from an uncaught signal is
|
395 |
* -<signal>. The kernel doesn't allow exit() or _exit() to pass
|
396 |
* a negative value. To get the proper exit code we need to
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397 |
* actually die from an uncaught signal. Here the default signal
|
398 |
* handler is installed, we send ourself a signal and we wait for
|
399 |
* it to arrive. */
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400 |
sigfillset(&act.sa_mask); |
401 |
act.sa_handler = SIG_DFL; |
402 |
sigaction(host_sig, &act, NULL);
|
403 |
|
404 |
/* For some reason raise(host_sig) doesn't send the signal when
|
405 |
* statically linked on x86-64. */
|
406 |
kill(getpid(), host_sig); |
407 |
|
408 |
/* Make sure the signal isn't masked (just reuse the mask inside
|
409 |
of act) */
|
410 |
sigdelset(&act.sa_mask, host_sig); |
411 |
sigsuspend(&act.sa_mask); |
412 |
|
413 |
/* unreachable */
|
414 |
assert(0);
|
415 |
|
416 |
} |
417 |
|
418 |
/* queue a signal so that it will be send to the virtual CPU as soon
|
419 |
as possible */
|
420 |
int queue_signal(CPUState *env, int sig, target_siginfo_t *info) |
421 |
{ |
422 |
TaskState *ts = env->opaque; |
423 |
struct emulated_sigtable *k;
|
424 |
struct sigqueue *q, **pq;
|
425 |
abi_ulong handler; |
426 |
int queue;
|
427 |
|
428 |
#if defined(DEBUG_SIGNAL)
|
429 |
fprintf(stderr, "queue_signal: sig=%d\n",
|
430 |
sig); |
431 |
#endif
|
432 |
k = &ts->sigtab[sig - 1];
|
433 |
queue = gdb_queuesig (); |
434 |
handler = sigact_table[sig - 1]._sa_handler;
|
435 |
if (!queue && handler == TARGET_SIG_DFL) {
|
436 |
if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
|
437 |
kill(getpid(),SIGSTOP); |
438 |
return 0; |
439 |
} else
|
440 |
/* default handler : ignore some signal. The other are fatal */
|
441 |
if (sig != TARGET_SIGCHLD &&
|
442 |
sig != TARGET_SIGURG && |
443 |
sig != TARGET_SIGWINCH && |
444 |
sig != TARGET_SIGCONT) { |
445 |
force_sig(sig); |
446 |
} else {
|
447 |
return 0; /* indicate ignored */ |
448 |
} |
449 |
} else if (!queue && handler == TARGET_SIG_IGN) { |
450 |
/* ignore signal */
|
451 |
return 0; |
452 |
} else if (!queue && handler == TARGET_SIG_ERR) { |
453 |
force_sig(sig); |
454 |
} else {
|
455 |
pq = &k->first; |
456 |
if (sig < TARGET_SIGRTMIN) {
|
457 |
/* if non real time signal, we queue exactly one signal */
|
458 |
if (!k->pending)
|
459 |
q = &k->info; |
460 |
else
|
461 |
return 0; |
462 |
} else {
|
463 |
if (!k->pending) {
|
464 |
/* first signal */
|
465 |
q = &k->info; |
466 |
} else {
|
467 |
q = alloc_sigqueue(env); |
468 |
if (!q)
|
469 |
return -EAGAIN;
|
470 |
while (*pq != NULL) |
471 |
pq = &(*pq)->next; |
472 |
} |
473 |
} |
474 |
*pq = q; |
475 |
q->info = *info; |
476 |
q->next = NULL;
|
477 |
k->pending = 1;
|
478 |
/* signal that a new signal is pending */
|
479 |
ts->signal_pending = 1;
|
480 |
return 1; /* indicates that the signal was queued */ |
481 |
} |
482 |
} |
483 |
|
484 |
static void host_signal_handler(int host_signum, siginfo_t *info, |
485 |
void *puc)
|
486 |
{ |
487 |
int sig;
|
488 |
target_siginfo_t tinfo; |
489 |
|
490 |
/* the CPU emulator uses some host signals to detect exceptions,
|
491 |
we forward to it some signals */
|
492 |
if ((host_signum == SIGSEGV || host_signum == SIGBUS)
|
493 |
&& info->si_code > 0) {
|
494 |
if (cpu_signal_handler(host_signum, info, puc))
|
495 |
return;
|
496 |
} |
497 |
|
498 |
/* get target signal number */
|
499 |
sig = host_to_target_signal(host_signum); |
500 |
if (sig < 1 || sig > TARGET_NSIG) |
501 |
return;
|
502 |
#if defined(DEBUG_SIGNAL)
|
503 |
fprintf(stderr, "qemu: got signal %d\n", sig);
|
504 |
#endif
|
505 |
host_to_target_siginfo_noswap(&tinfo, info); |
506 |
if (queue_signal(thread_env, sig, &tinfo) == 1) { |
507 |
/* interrupt the virtual CPU as soon as possible */
|
508 |
cpu_exit(thread_env); |
509 |
} |
510 |
} |
511 |
|
512 |
/* do_sigaltstack() returns target values and errnos. */
|
513 |
/* compare linux/kernel/signal.c:do_sigaltstack() */
|
514 |
abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp) |
515 |
{ |
516 |
int ret;
|
517 |
struct target_sigaltstack oss;
|
518 |
|
519 |
/* XXX: test errors */
|
520 |
if(uoss_addr)
|
521 |
{ |
522 |
__put_user(target_sigaltstack_used.ss_sp, &oss.ss_sp); |
523 |
__put_user(target_sigaltstack_used.ss_size, &oss.ss_size); |
524 |
__put_user(sas_ss_flags(sp), &oss.ss_flags); |
525 |
} |
526 |
|
527 |
if(uss_addr)
|
528 |
{ |
529 |
struct target_sigaltstack *uss;
|
530 |
struct target_sigaltstack ss;
|
531 |
|
532 |
ret = -TARGET_EFAULT; |
533 |
if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1) |
534 |
|| __get_user(ss.ss_sp, &uss->ss_sp) |
535 |
|| __get_user(ss.ss_size, &uss->ss_size) |
536 |
|| __get_user(ss.ss_flags, &uss->ss_flags)) |
537 |
goto out;
|
538 |
unlock_user_struct(uss, uss_addr, 0);
|
539 |
|
540 |
ret = -TARGET_EPERM; |
541 |
if (on_sig_stack(sp))
|
542 |
goto out;
|
543 |
|
544 |
ret = -TARGET_EINVAL; |
545 |
if (ss.ss_flags != TARGET_SS_DISABLE
|
546 |
&& ss.ss_flags != TARGET_SS_ONSTACK |
547 |
&& ss.ss_flags != 0)
|
548 |
goto out;
|
549 |
|
550 |
if (ss.ss_flags == TARGET_SS_DISABLE) {
|
551 |
ss.ss_size = 0;
|
552 |
ss.ss_sp = 0;
|
553 |
} else {
|
554 |
ret = -TARGET_ENOMEM; |
555 |
if (ss.ss_size < MINSIGSTKSZ)
|
556 |
goto out;
|
557 |
} |
558 |
|
559 |
target_sigaltstack_used.ss_sp = ss.ss_sp; |
560 |
target_sigaltstack_used.ss_size = ss.ss_size; |
561 |
} |
562 |
|
563 |
if (uoss_addr) {
|
564 |
ret = -TARGET_EFAULT; |
565 |
if (copy_to_user(uoss_addr, &oss, sizeof(oss))) |
566 |
goto out;
|
567 |
} |
568 |
|
569 |
ret = 0;
|
570 |
out:
|
571 |
return ret;
|
572 |
} |
573 |
|
574 |
/* do_sigaction() return host values and errnos */
|
575 |
int do_sigaction(int sig, const struct target_sigaction *act, |
576 |
struct target_sigaction *oact)
|
577 |
{ |
578 |
struct target_sigaction *k;
|
579 |
struct sigaction act1;
|
580 |
int host_sig;
|
581 |
int ret = 0; |
582 |
|
583 |
if (sig < 1 || sig > TARGET_NSIG || sig == TARGET_SIGKILL || sig == TARGET_SIGSTOP) |
584 |
return -EINVAL;
|
585 |
k = &sigact_table[sig - 1];
|
586 |
#if defined(DEBUG_SIGNAL)
|
587 |
fprintf(stderr, "sigaction sig=%d act=0x%p, oact=0x%p\n",
|
588 |
sig, act, oact); |
589 |
#endif
|
590 |
if (oact) {
|
591 |
oact->_sa_handler = tswapl(k->_sa_handler); |
592 |
oact->sa_flags = tswapl(k->sa_flags); |
593 |
#if !defined(TARGET_MIPS)
|
594 |
oact->sa_restorer = tswapl(k->sa_restorer); |
595 |
#endif
|
596 |
oact->sa_mask = k->sa_mask; |
597 |
} |
598 |
if (act) {
|
599 |
/* FIXME: This is not threadsafe. */
|
600 |
k->_sa_handler = tswapl(act->_sa_handler); |
601 |
k->sa_flags = tswapl(act->sa_flags); |
602 |
#if !defined(TARGET_MIPS)
|
603 |
k->sa_restorer = tswapl(act->sa_restorer); |
604 |
#endif
|
605 |
k->sa_mask = act->sa_mask; |
606 |
|
607 |
/* we update the host linux signal state */
|
608 |
host_sig = target_to_host_signal(sig); |
609 |
if (host_sig != SIGSEGV && host_sig != SIGBUS) {
|
610 |
sigfillset(&act1.sa_mask); |
611 |
act1.sa_flags = SA_SIGINFO; |
612 |
if (k->sa_flags & TARGET_SA_RESTART)
|
613 |
act1.sa_flags |= SA_RESTART; |
614 |
/* NOTE: it is important to update the host kernel signal
|
615 |
ignore state to avoid getting unexpected interrupted
|
616 |
syscalls */
|
617 |
if (k->_sa_handler == TARGET_SIG_IGN) {
|
618 |
act1.sa_sigaction = (void *)SIG_IGN;
|
619 |
} else if (k->_sa_handler == TARGET_SIG_DFL) { |
620 |
if (fatal_signal (sig))
|
621 |
act1.sa_sigaction = host_signal_handler; |
622 |
else
|
623 |
act1.sa_sigaction = (void *)SIG_DFL;
|
624 |
} else {
|
625 |
act1.sa_sigaction = host_signal_handler; |
626 |
} |
627 |
ret = sigaction(host_sig, &act1, NULL);
|
628 |
} |
629 |
} |
630 |
return ret;
|
631 |
} |
632 |
|
633 |
static inline int copy_siginfo_to_user(target_siginfo_t *tinfo, |
634 |
const target_siginfo_t *info)
|
635 |
{ |
636 |
tswap_siginfo(tinfo, info); |
637 |
return 0; |
638 |
} |
639 |
|
640 |
static inline int current_exec_domain_sig(int sig) |
641 |
{ |
642 |
return /* current->exec_domain && current->exec_domain->signal_invmap |
643 |
&& sig < 32 ? current->exec_domain->signal_invmap[sig] : */ sig;
|
644 |
} |
645 |
|
646 |
#if defined(TARGET_I386) && TARGET_ABI_BITS == 32 |
647 |
|
648 |
/* from the Linux kernel */
|
649 |
|
650 |
struct target_fpreg {
|
651 |
uint16_t significand[4];
|
652 |
uint16_t exponent; |
653 |
}; |
654 |
|
655 |
struct target_fpxreg {
|
656 |
uint16_t significand[4];
|
657 |
uint16_t exponent; |
658 |
uint16_t padding[3];
|
659 |
}; |
660 |
|
661 |
struct target_xmmreg {
|
662 |
abi_ulong element[4];
|
663 |
}; |
664 |
|
665 |
struct target_fpstate {
|
666 |
/* Regular FPU environment */
|
667 |
abi_ulong cw; |
668 |
abi_ulong sw; |
669 |
abi_ulong tag; |
670 |
abi_ulong ipoff; |
671 |
abi_ulong cssel; |
672 |
abi_ulong dataoff; |
673 |
abi_ulong datasel; |
674 |
struct target_fpreg _st[8]; |
675 |
uint16_t status; |
676 |
uint16_t magic; /* 0xffff = regular FPU data only */
|
677 |
|
678 |
/* FXSR FPU environment */
|
679 |
abi_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */ |
680 |
abi_ulong mxcsr; |
681 |
abi_ulong reserved; |
682 |
struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */ |
683 |
struct target_xmmreg _xmm[8]; |
684 |
abi_ulong padding[56];
|
685 |
}; |
686 |
|
687 |
#define X86_FXSR_MAGIC 0x0000 |
688 |
|
689 |
struct target_sigcontext {
|
690 |
uint16_t gs, __gsh; |
691 |
uint16_t fs, __fsh; |
692 |
uint16_t es, __esh; |
693 |
uint16_t ds, __dsh; |
694 |
abi_ulong edi; |
695 |
abi_ulong esi; |
696 |
abi_ulong ebp; |
697 |
abi_ulong esp; |
698 |
abi_ulong ebx; |
699 |
abi_ulong edx; |
700 |
abi_ulong ecx; |
701 |
abi_ulong eax; |
702 |
abi_ulong trapno; |
703 |
abi_ulong err; |
704 |
abi_ulong eip; |
705 |
uint16_t cs, __csh; |
706 |
abi_ulong eflags; |
707 |
abi_ulong esp_at_signal; |
708 |
uint16_t ss, __ssh; |
709 |
abi_ulong fpstate; /* pointer */
|
710 |
abi_ulong oldmask; |
711 |
abi_ulong cr2; |
712 |
}; |
713 |
|
714 |
struct target_ucontext {
|
715 |
abi_ulong tuc_flags; |
716 |
abi_ulong tuc_link; |
717 |
target_stack_t tuc_stack; |
718 |
struct target_sigcontext tuc_mcontext;
|
719 |
target_sigset_t tuc_sigmask; /* mask last for extensibility */
|
720 |
}; |
721 |
|
722 |
struct sigframe
|
723 |
{ |
724 |
abi_ulong pretcode; |
725 |
int sig;
|
726 |
struct target_sigcontext sc;
|
727 |
struct target_fpstate fpstate;
|
728 |
abi_ulong extramask[TARGET_NSIG_WORDS-1];
|
729 |
char retcode[8]; |
730 |
}; |
731 |
|
732 |
struct rt_sigframe
|
733 |
{ |
734 |
abi_ulong pretcode; |
735 |
int sig;
|
736 |
abi_ulong pinfo; |
737 |
abi_ulong puc; |
738 |
struct target_siginfo info;
|
739 |
struct target_ucontext uc;
|
740 |
struct target_fpstate fpstate;
|
741 |
char retcode[8]; |
742 |
}; |
743 |
|
744 |
/*
|
745 |
* Set up a signal frame.
|
746 |
*/
|
747 |
|
748 |
/* XXX: save x87 state */
|
749 |
static int |
750 |
setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate, |
751 |
CPUX86State *env, abi_ulong mask, abi_ulong fpstate_addr) |
752 |
{ |
753 |
int err = 0; |
754 |
uint16_t magic; |
755 |
|
756 |
/* already locked in setup_frame() */
|
757 |
err |= __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs); |
758 |
err |= __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs); |
759 |
err |= __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es); |
760 |
err |= __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds); |
761 |
err |= __put_user(env->regs[R_EDI], &sc->edi); |
762 |
err |= __put_user(env->regs[R_ESI], &sc->esi); |
763 |
err |= __put_user(env->regs[R_EBP], &sc->ebp); |
764 |
err |= __put_user(env->regs[R_ESP], &sc->esp); |
765 |
err |= __put_user(env->regs[R_EBX], &sc->ebx); |
766 |
err |= __put_user(env->regs[R_EDX], &sc->edx); |
767 |
err |= __put_user(env->regs[R_ECX], &sc->ecx); |
768 |
err |= __put_user(env->regs[R_EAX], &sc->eax); |
769 |
err |= __put_user(env->exception_index, &sc->trapno); |
770 |
err |= __put_user(env->error_code, &sc->err); |
771 |
err |= __put_user(env->eip, &sc->eip); |
772 |
err |= __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs); |
773 |
err |= __put_user(env->eflags, &sc->eflags); |
774 |
err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal); |
775 |
err |= __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss); |
776 |
|
777 |
cpu_x86_fsave(env, fpstate_addr, 1);
|
778 |
fpstate->status = fpstate->sw; |
779 |
magic = 0xffff;
|
780 |
err |= __put_user(magic, &fpstate->magic); |
781 |
err |= __put_user(fpstate_addr, &sc->fpstate); |
782 |
|
783 |
/* non-iBCS2 extensions.. */
|
784 |
err |= __put_user(mask, &sc->oldmask); |
785 |
err |= __put_user(env->cr[2], &sc->cr2);
|
786 |
return err;
|
787 |
} |
788 |
|
789 |
/*
|
790 |
* Determine which stack to use..
|
791 |
*/
|
792 |
|
793 |
static inline abi_ulong |
794 |
get_sigframe(struct target_sigaction *ka, CPUX86State *env, size_t frame_size)
|
795 |
{ |
796 |
unsigned long esp; |
797 |
|
798 |
/* Default to using normal stack */
|
799 |
esp = env->regs[R_ESP]; |
800 |
/* This is the X/Open sanctioned signal stack switching. */
|
801 |
if (ka->sa_flags & TARGET_SA_ONSTACK) {
|
802 |
if (sas_ss_flags(esp) == 0) |
803 |
esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
804 |
} |
805 |
|
806 |
/* This is the legacy signal stack switching. */
|
807 |
else
|
808 |
if ((env->segs[R_SS].selector & 0xffff) != __USER_DS && |
809 |
!(ka->sa_flags & TARGET_SA_RESTORER) && |
810 |
ka->sa_restorer) { |
811 |
esp = (unsigned long) ka->sa_restorer; |
812 |
} |
813 |
return (esp - frame_size) & -8ul; |
814 |
} |
815 |
|
816 |
/* compare linux/arch/i386/kernel/signal.c:setup_frame() */
|
817 |
static void setup_frame(int sig, struct target_sigaction *ka, |
818 |
target_sigset_t *set, CPUX86State *env) |
819 |
{ |
820 |
abi_ulong frame_addr; |
821 |
struct sigframe *frame;
|
822 |
int i, err = 0; |
823 |
|
824 |
frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
825 |
|
826 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
827 |
goto give_sigsegv;
|
828 |
|
829 |
err |= __put_user(current_exec_domain_sig(sig), |
830 |
&frame->sig); |
831 |
if (err)
|
832 |
goto give_sigsegv;
|
833 |
|
834 |
setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0],
|
835 |
frame_addr + offsetof(struct sigframe, fpstate));
|
836 |
if (err)
|
837 |
goto give_sigsegv;
|
838 |
|
839 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
840 |
if (__put_user(set->sig[i], &frame->extramask[i - 1])) |
841 |
goto give_sigsegv;
|
842 |
} |
843 |
|
844 |
/* Set up to return from userspace. If provided, use a stub
|
845 |
already in userspace. */
|
846 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
847 |
err |= __put_user(ka->sa_restorer, &frame->pretcode); |
848 |
} else {
|
849 |
uint16_t val16; |
850 |
abi_ulong retcode_addr; |
851 |
retcode_addr = frame_addr + offsetof(struct sigframe, retcode);
|
852 |
err |= __put_user(retcode_addr, &frame->pretcode); |
853 |
/* This is popl %eax ; movl $,%eax ; int $0x80 */
|
854 |
val16 = 0xb858;
|
855 |
err |= __put_user(val16, (uint16_t *)(frame->retcode+0));
|
856 |
err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2)); |
857 |
val16 = 0x80cd;
|
858 |
err |= __put_user(val16, (uint16_t *)(frame->retcode+6));
|
859 |
} |
860 |
|
861 |
if (err)
|
862 |
goto give_sigsegv;
|
863 |
|
864 |
/* Set up registers for signal handler */
|
865 |
env->regs[R_ESP] = frame_addr; |
866 |
env->eip = ka->_sa_handler; |
867 |
|
868 |
cpu_x86_load_seg(env, R_DS, __USER_DS); |
869 |
cpu_x86_load_seg(env, R_ES, __USER_DS); |
870 |
cpu_x86_load_seg(env, R_SS, __USER_DS); |
871 |
cpu_x86_load_seg(env, R_CS, __USER_CS); |
872 |
env->eflags &= ~TF_MASK; |
873 |
|
874 |
unlock_user_struct(frame, frame_addr, 1);
|
875 |
|
876 |
return;
|
877 |
|
878 |
give_sigsegv:
|
879 |
unlock_user_struct(frame, frame_addr, 1);
|
880 |
if (sig == TARGET_SIGSEGV)
|
881 |
ka->_sa_handler = TARGET_SIG_DFL; |
882 |
force_sig(TARGET_SIGSEGV /* , current */);
|
883 |
} |
884 |
|
885 |
/* compare linux/arch/i386/kernel/signal.c:setup_rt_frame() */
|
886 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
887 |
target_siginfo_t *info, |
888 |
target_sigset_t *set, CPUX86State *env) |
889 |
{ |
890 |
abi_ulong frame_addr, addr; |
891 |
struct rt_sigframe *frame;
|
892 |
int i, err = 0; |
893 |
|
894 |
frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
895 |
|
896 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
897 |
goto give_sigsegv;
|
898 |
|
899 |
err |= __put_user(current_exec_domain_sig(sig), |
900 |
&frame->sig); |
901 |
addr = frame_addr + offsetof(struct rt_sigframe, info);
|
902 |
err |= __put_user(addr, &frame->pinfo); |
903 |
addr = frame_addr + offsetof(struct rt_sigframe, uc);
|
904 |
err |= __put_user(addr, &frame->puc); |
905 |
err |= copy_siginfo_to_user(&frame->info, info); |
906 |
if (err)
|
907 |
goto give_sigsegv;
|
908 |
|
909 |
/* Create the ucontext. */
|
910 |
err |= __put_user(0, &frame->uc.tuc_flags);
|
911 |
err |= __put_user(0, &frame->uc.tuc_link);
|
912 |
err |= __put_user(target_sigaltstack_used.ss_sp, |
913 |
&frame->uc.tuc_stack.ss_sp); |
914 |
err |= __put_user(sas_ss_flags(get_sp_from_cpustate(env)), |
915 |
&frame->uc.tuc_stack.ss_flags); |
916 |
err |= __put_user(target_sigaltstack_used.ss_size, |
917 |
&frame->uc.tuc_stack.ss_size); |
918 |
err |= setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate, |
919 |
env, set->sig[0],
|
920 |
frame_addr + offsetof(struct rt_sigframe, fpstate));
|
921 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
922 |
if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
|
923 |
goto give_sigsegv;
|
924 |
} |
925 |
|
926 |
/* Set up to return from userspace. If provided, use a stub
|
927 |
already in userspace. */
|
928 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
929 |
err |= __put_user(ka->sa_restorer, &frame->pretcode); |
930 |
} else {
|
931 |
uint16_t val16; |
932 |
addr = frame_addr + offsetof(struct rt_sigframe, retcode);
|
933 |
err |= __put_user(addr, &frame->pretcode); |
934 |
/* This is movl $,%eax ; int $0x80 */
|
935 |
err |= __put_user(0xb8, (char *)(frame->retcode+0)); |
936 |
err |= __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1)); |
937 |
val16 = 0x80cd;
|
938 |
err |= __put_user(val16, (uint16_t *)(frame->retcode+5));
|
939 |
} |
940 |
|
941 |
if (err)
|
942 |
goto give_sigsegv;
|
943 |
|
944 |
/* Set up registers for signal handler */
|
945 |
env->regs[R_ESP] = frame_addr; |
946 |
env->eip = ka->_sa_handler; |
947 |
|
948 |
cpu_x86_load_seg(env, R_DS, __USER_DS); |
949 |
cpu_x86_load_seg(env, R_ES, __USER_DS); |
950 |
cpu_x86_load_seg(env, R_SS, __USER_DS); |
951 |
cpu_x86_load_seg(env, R_CS, __USER_CS); |
952 |
env->eflags &= ~TF_MASK; |
953 |
|
954 |
unlock_user_struct(frame, frame_addr, 1);
|
955 |
|
956 |
return;
|
957 |
|
958 |
give_sigsegv:
|
959 |
unlock_user_struct(frame, frame_addr, 1);
|
960 |
if (sig == TARGET_SIGSEGV)
|
961 |
ka->_sa_handler = TARGET_SIG_DFL; |
962 |
force_sig(TARGET_SIGSEGV /* , current */);
|
963 |
} |
964 |
|
965 |
static int |
966 |
restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax) |
967 |
{ |
968 |
unsigned int err = 0; |
969 |
abi_ulong fpstate_addr; |
970 |
unsigned int tmpflags; |
971 |
|
972 |
cpu_x86_load_seg(env, R_GS, tswap16(sc->gs)); |
973 |
cpu_x86_load_seg(env, R_FS, tswap16(sc->fs)); |
974 |
cpu_x86_load_seg(env, R_ES, tswap16(sc->es)); |
975 |
cpu_x86_load_seg(env, R_DS, tswap16(sc->ds)); |
976 |
|
977 |
env->regs[R_EDI] = tswapl(sc->edi); |
978 |
env->regs[R_ESI] = tswapl(sc->esi); |
979 |
env->regs[R_EBP] = tswapl(sc->ebp); |
980 |
env->regs[R_ESP] = tswapl(sc->esp); |
981 |
env->regs[R_EBX] = tswapl(sc->ebx); |
982 |
env->regs[R_EDX] = tswapl(sc->edx); |
983 |
env->regs[R_ECX] = tswapl(sc->ecx); |
984 |
env->eip = tswapl(sc->eip); |
985 |
|
986 |
cpu_x86_load_seg(env, R_CS, lduw(&sc->cs) | 3);
|
987 |
cpu_x86_load_seg(env, R_SS, lduw(&sc->ss) | 3);
|
988 |
|
989 |
tmpflags = tswapl(sc->eflags); |
990 |
env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5); |
991 |
// regs->orig_eax = -1; /* disable syscall checks */
|
992 |
|
993 |
fpstate_addr = tswapl(sc->fpstate); |
994 |
if (fpstate_addr != 0) { |
995 |
if (!access_ok(VERIFY_READ, fpstate_addr,
|
996 |
sizeof(struct target_fpstate))) |
997 |
goto badframe;
|
998 |
cpu_x86_frstor(env, fpstate_addr, 1);
|
999 |
} |
1000 |
|
1001 |
*peax = tswapl(sc->eax); |
1002 |
return err;
|
1003 |
badframe:
|
1004 |
return 1; |
1005 |
} |
1006 |
|
1007 |
long do_sigreturn(CPUX86State *env)
|
1008 |
{ |
1009 |
struct sigframe *frame;
|
1010 |
abi_ulong frame_addr = env->regs[R_ESP] - 8;
|
1011 |
target_sigset_t target_set; |
1012 |
sigset_t set; |
1013 |
int eax, i;
|
1014 |
|
1015 |
#if defined(DEBUG_SIGNAL)
|
1016 |
fprintf(stderr, "do_sigreturn\n");
|
1017 |
#endif
|
1018 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
1019 |
goto badframe;
|
1020 |
/* set blocked signals */
|
1021 |
if (__get_user(target_set.sig[0], &frame->sc.oldmask)) |
1022 |
goto badframe;
|
1023 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
1024 |
if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) |
1025 |
goto badframe;
|
1026 |
} |
1027 |
|
1028 |
target_to_host_sigset_internal(&set, &target_set); |
1029 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
1030 |
|
1031 |
/* restore registers */
|
1032 |
if (restore_sigcontext(env, &frame->sc, &eax))
|
1033 |
goto badframe;
|
1034 |
unlock_user_struct(frame, frame_addr, 0);
|
1035 |
return eax;
|
1036 |
|
1037 |
badframe:
|
1038 |
unlock_user_struct(frame, frame_addr, 0);
|
1039 |
force_sig(TARGET_SIGSEGV); |
1040 |
return 0; |
1041 |
} |
1042 |
|
1043 |
long do_rt_sigreturn(CPUX86State *env)
|
1044 |
{ |
1045 |
abi_ulong frame_addr; |
1046 |
struct rt_sigframe *frame;
|
1047 |
sigset_t set; |
1048 |
int eax;
|
1049 |
|
1050 |
frame_addr = env->regs[R_ESP] - 4;
|
1051 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
1052 |
goto badframe;
|
1053 |
target_to_host_sigset(&set, &frame->uc.tuc_sigmask); |
1054 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
1055 |
|
1056 |
if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax))
|
1057 |
goto badframe;
|
1058 |
|
1059 |
if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0, |
1060 |
get_sp_from_cpustate(env)) == -EFAULT) |
1061 |
goto badframe;
|
1062 |
|
1063 |
unlock_user_struct(frame, frame_addr, 0);
|
1064 |
return eax;
|
1065 |
|
1066 |
badframe:
|
1067 |
unlock_user_struct(frame, frame_addr, 0);
|
1068 |
force_sig(TARGET_SIGSEGV); |
1069 |
return 0; |
1070 |
} |
1071 |
|
1072 |
#elif defined(TARGET_ARM)
|
1073 |
|
1074 |
struct target_sigcontext {
|
1075 |
abi_ulong trap_no; |
1076 |
abi_ulong error_code; |
1077 |
abi_ulong oldmask; |
1078 |
abi_ulong arm_r0; |
1079 |
abi_ulong arm_r1; |
1080 |
abi_ulong arm_r2; |
1081 |
abi_ulong arm_r3; |
1082 |
abi_ulong arm_r4; |
1083 |
abi_ulong arm_r5; |
1084 |
abi_ulong arm_r6; |
1085 |
abi_ulong arm_r7; |
1086 |
abi_ulong arm_r8; |
1087 |
abi_ulong arm_r9; |
1088 |
abi_ulong arm_r10; |
1089 |
abi_ulong arm_fp; |
1090 |
abi_ulong arm_ip; |
1091 |
abi_ulong arm_sp; |
1092 |
abi_ulong arm_lr; |
1093 |
abi_ulong arm_pc; |
1094 |
abi_ulong arm_cpsr; |
1095 |
abi_ulong fault_address; |
1096 |
}; |
1097 |
|
1098 |
struct target_ucontext_v1 {
|
1099 |
abi_ulong tuc_flags; |
1100 |
abi_ulong tuc_link; |
1101 |
target_stack_t tuc_stack; |
1102 |
struct target_sigcontext tuc_mcontext;
|
1103 |
target_sigset_t tuc_sigmask; /* mask last for extensibility */
|
1104 |
}; |
1105 |
|
1106 |
struct target_ucontext_v2 {
|
1107 |
abi_ulong tuc_flags; |
1108 |
abi_ulong tuc_link; |
1109 |
target_stack_t tuc_stack; |
1110 |
struct target_sigcontext tuc_mcontext;
|
1111 |
target_sigset_t tuc_sigmask; /* mask last for extensibility */
|
1112 |
char __unused[128 - sizeof(sigset_t)]; |
1113 |
abi_ulong tuc_regspace[128] __attribute__((__aligned__(8))); |
1114 |
}; |
1115 |
|
1116 |
struct sigframe_v1
|
1117 |
{ |
1118 |
struct target_sigcontext sc;
|
1119 |
abi_ulong extramask[TARGET_NSIG_WORDS-1];
|
1120 |
abi_ulong retcode; |
1121 |
}; |
1122 |
|
1123 |
struct sigframe_v2
|
1124 |
{ |
1125 |
struct target_ucontext_v2 uc;
|
1126 |
abi_ulong retcode; |
1127 |
}; |
1128 |
|
1129 |
struct rt_sigframe_v1
|
1130 |
{ |
1131 |
abi_ulong pinfo; |
1132 |
abi_ulong puc; |
1133 |
struct target_siginfo info;
|
1134 |
struct target_ucontext_v1 uc;
|
1135 |
abi_ulong retcode; |
1136 |
}; |
1137 |
|
1138 |
struct rt_sigframe_v2
|
1139 |
{ |
1140 |
struct target_siginfo info;
|
1141 |
struct target_ucontext_v2 uc;
|
1142 |
abi_ulong retcode; |
1143 |
}; |
1144 |
|
1145 |
#define TARGET_CONFIG_CPU_32 1 |
1146 |
|
1147 |
/*
|
1148 |
* For ARM syscalls, we encode the syscall number into the instruction.
|
1149 |
*/
|
1150 |
#define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE)) |
1151 |
#define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE)) |
1152 |
|
1153 |
/*
|
1154 |
* For Thumb syscalls, we pass the syscall number via r7. We therefore
|
1155 |
* need two 16-bit instructions.
|
1156 |
*/
|
1157 |
#define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn)) |
1158 |
#define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn)) |
1159 |
|
1160 |
static const abi_ulong retcodes[4] = { |
1161 |
SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN, |
1162 |
SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN |
1163 |
}; |
1164 |
|
1165 |
|
1166 |
#define __get_user_error(x,p,e) __get_user(x, p)
|
1167 |
|
1168 |
static inline int valid_user_regs(CPUState *regs) |
1169 |
{ |
1170 |
return 1; |
1171 |
} |
1172 |
|
1173 |
static void |
1174 |
setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/ |
1175 |
CPUState *env, abi_ulong mask) |
1176 |
{ |
1177 |
__put_user(env->regs[0], &sc->arm_r0);
|
1178 |
__put_user(env->regs[1], &sc->arm_r1);
|
1179 |
__put_user(env->regs[2], &sc->arm_r2);
|
1180 |
__put_user(env->regs[3], &sc->arm_r3);
|
1181 |
__put_user(env->regs[4], &sc->arm_r4);
|
1182 |
__put_user(env->regs[5], &sc->arm_r5);
|
1183 |
__put_user(env->regs[6], &sc->arm_r6);
|
1184 |
__put_user(env->regs[7], &sc->arm_r7);
|
1185 |
__put_user(env->regs[8], &sc->arm_r8);
|
1186 |
__put_user(env->regs[9], &sc->arm_r9);
|
1187 |
__put_user(env->regs[10], &sc->arm_r10);
|
1188 |
__put_user(env->regs[11], &sc->arm_fp);
|
1189 |
__put_user(env->regs[12], &sc->arm_ip);
|
1190 |
__put_user(env->regs[13], &sc->arm_sp);
|
1191 |
__put_user(env->regs[14], &sc->arm_lr);
|
1192 |
__put_user(env->regs[15], &sc->arm_pc);
|
1193 |
#ifdef TARGET_CONFIG_CPU_32
|
1194 |
__put_user(cpsr_read(env), &sc->arm_cpsr); |
1195 |
#endif
|
1196 |
|
1197 |
__put_user(/* current->thread.trap_no */ 0, &sc->trap_no); |
1198 |
__put_user(/* current->thread.error_code */ 0, &sc->error_code); |
1199 |
__put_user(/* current->thread.address */ 0, &sc->fault_address); |
1200 |
__put_user(mask, &sc->oldmask); |
1201 |
} |
1202 |
|
1203 |
static inline abi_ulong |
1204 |
get_sigframe(struct target_sigaction *ka, CPUState *regs, int framesize) |
1205 |
{ |
1206 |
unsigned long sp = regs->regs[13]; |
1207 |
|
1208 |
/*
|
1209 |
* This is the X/Open sanctioned signal stack switching.
|
1210 |
*/
|
1211 |
if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp))
|
1212 |
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
1213 |
/*
|
1214 |
* ATPCS B01 mandates 8-byte alignment
|
1215 |
*/
|
1216 |
return (sp - framesize) & ~7; |
1217 |
} |
1218 |
|
1219 |
static int |
1220 |
setup_return(CPUState *env, struct target_sigaction *ka,
|
1221 |
abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr)
|
1222 |
{ |
1223 |
abi_ulong handler = ka->_sa_handler; |
1224 |
abi_ulong retcode; |
1225 |
int thumb = handler & 1; |
1226 |
|
1227 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
1228 |
retcode = ka->sa_restorer; |
1229 |
} else {
|
1230 |
unsigned int idx = thumb; |
1231 |
|
1232 |
if (ka->sa_flags & TARGET_SA_SIGINFO)
|
1233 |
idx += 2;
|
1234 |
|
1235 |
if (__put_user(retcodes[idx], rc))
|
1236 |
return 1; |
1237 |
#if 0
|
1238 |
flush_icache_range((abi_ulong)rc,
|
1239 |
(abi_ulong)(rc + 1));
|
1240 |
#endif
|
1241 |
retcode = rc_addr + thumb; |
1242 |
} |
1243 |
|
1244 |
env->regs[0] = usig;
|
1245 |
env->regs[13] = frame_addr;
|
1246 |
env->regs[14] = retcode;
|
1247 |
env->regs[15] = handler & (thumb ? ~1 : ~3); |
1248 |
env->thumb = thumb; |
1249 |
|
1250 |
#if 0
|
1251 |
#ifdef TARGET_CONFIG_CPU_32
|
1252 |
env->cpsr = cpsr;
|
1253 |
#endif
|
1254 |
#endif
|
1255 |
|
1256 |
return 0; |
1257 |
} |
1258 |
|
1259 |
static void setup_sigframe_v2(struct target_ucontext_v2 *uc, |
1260 |
target_sigset_t *set, CPUState *env) |
1261 |
{ |
1262 |
struct target_sigaltstack stack;
|
1263 |
int i;
|
1264 |
|
1265 |
/* Clear all the bits of the ucontext we don't use. */
|
1266 |
memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext)); |
1267 |
|
1268 |
memset(&stack, 0, sizeof(stack)); |
1269 |
__put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp); |
1270 |
__put_user(target_sigaltstack_used.ss_size, &stack.ss_size); |
1271 |
__put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags); |
1272 |
memcpy(&uc->tuc_stack, &stack, sizeof(stack));
|
1273 |
|
1274 |
setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]);
|
1275 |
/* FIXME: Save coprocessor signal frame. */
|
1276 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
1277 |
__put_user(set->sig[i], &uc->tuc_sigmask.sig[i]); |
1278 |
} |
1279 |
} |
1280 |
|
1281 |
/* compare linux/arch/arm/kernel/signal.c:setup_frame() */
|
1282 |
static void setup_frame_v1(int usig, struct target_sigaction *ka, |
1283 |
target_sigset_t *set, CPUState *regs) |
1284 |
{ |
1285 |
struct sigframe_v1 *frame;
|
1286 |
abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
|
1287 |
int i;
|
1288 |
|
1289 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
1290 |
return;
|
1291 |
|
1292 |
setup_sigcontext(&frame->sc, regs, set->sig[0]);
|
1293 |
|
1294 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
1295 |
if (__put_user(set->sig[i], &frame->extramask[i - 1])) |
1296 |
goto end;
|
1297 |
} |
1298 |
|
1299 |
setup_return(regs, ka, &frame->retcode, frame_addr, usig, |
1300 |
frame_addr + offsetof(struct sigframe_v1, retcode));
|
1301 |
|
1302 |
end:
|
1303 |
unlock_user_struct(frame, frame_addr, 1);
|
1304 |
} |
1305 |
|
1306 |
static void setup_frame_v2(int usig, struct target_sigaction *ka, |
1307 |
target_sigset_t *set, CPUState *regs) |
1308 |
{ |
1309 |
struct sigframe_v2 *frame;
|
1310 |
abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
|
1311 |
|
1312 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
1313 |
return;
|
1314 |
|
1315 |
setup_sigframe_v2(&frame->uc, set, regs); |
1316 |
|
1317 |
setup_return(regs, ka, &frame->retcode, frame_addr, usig, |
1318 |
frame_addr + offsetof(struct sigframe_v2, retcode));
|
1319 |
|
1320 |
unlock_user_struct(frame, frame_addr, 1);
|
1321 |
} |
1322 |
|
1323 |
static void setup_frame(int usig, struct target_sigaction *ka, |
1324 |
target_sigset_t *set, CPUState *regs) |
1325 |
{ |
1326 |
if (get_osversion() >= 0x020612) { |
1327 |
setup_frame_v2(usig, ka, set, regs); |
1328 |
} else {
|
1329 |
setup_frame_v1(usig, ka, set, regs); |
1330 |
} |
1331 |
} |
1332 |
|
1333 |
/* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */
|
1334 |
static void setup_rt_frame_v1(int usig, struct target_sigaction *ka, |
1335 |
target_siginfo_t *info, |
1336 |
target_sigset_t *set, CPUState *env) |
1337 |
{ |
1338 |
struct rt_sigframe_v1 *frame;
|
1339 |
abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
1340 |
struct target_sigaltstack stack;
|
1341 |
int i;
|
1342 |
abi_ulong info_addr, uc_addr; |
1343 |
|
1344 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
1345 |
return /* 1 */; |
1346 |
|
1347 |
info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info);
|
1348 |
__put_user(info_addr, &frame->pinfo); |
1349 |
uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc);
|
1350 |
__put_user(uc_addr, &frame->puc); |
1351 |
copy_siginfo_to_user(&frame->info, info); |
1352 |
|
1353 |
/* Clear all the bits of the ucontext we don't use. */
|
1354 |
memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext)); |
1355 |
|
1356 |
memset(&stack, 0, sizeof(stack)); |
1357 |
__put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp); |
1358 |
__put_user(target_sigaltstack_used.ss_size, &stack.ss_size); |
1359 |
__put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags); |
1360 |
memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
|
1361 |
|
1362 |
setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]);
|
1363 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
1364 |
if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
|
1365 |
goto end;
|
1366 |
} |
1367 |
|
1368 |
setup_return(env, ka, &frame->retcode, frame_addr, usig, |
1369 |
frame_addr + offsetof(struct rt_sigframe_v1, retcode));
|
1370 |
|
1371 |
env->regs[1] = info_addr;
|
1372 |
env->regs[2] = uc_addr;
|
1373 |
|
1374 |
end:
|
1375 |
unlock_user_struct(frame, frame_addr, 1);
|
1376 |
} |
1377 |
|
1378 |
static void setup_rt_frame_v2(int usig, struct target_sigaction *ka, |
1379 |
target_siginfo_t *info, |
1380 |
target_sigset_t *set, CPUState *env) |
1381 |
{ |
1382 |
struct rt_sigframe_v2 *frame;
|
1383 |
abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
1384 |
abi_ulong info_addr, uc_addr; |
1385 |
|
1386 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
1387 |
return /* 1 */; |
1388 |
|
1389 |
info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info);
|
1390 |
uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc);
|
1391 |
copy_siginfo_to_user(&frame->info, info); |
1392 |
|
1393 |
setup_sigframe_v2(&frame->uc, set, env); |
1394 |
|
1395 |
setup_return(env, ka, &frame->retcode, frame_addr, usig, |
1396 |
frame_addr + offsetof(struct rt_sigframe_v2, retcode));
|
1397 |
|
1398 |
env->regs[1] = info_addr;
|
1399 |
env->regs[2] = uc_addr;
|
1400 |
|
1401 |
unlock_user_struct(frame, frame_addr, 1);
|
1402 |
} |
1403 |
|
1404 |
static void setup_rt_frame(int usig, struct target_sigaction *ka, |
1405 |
target_siginfo_t *info, |
1406 |
target_sigset_t *set, CPUState *env) |
1407 |
{ |
1408 |
if (get_osversion() >= 0x020612) { |
1409 |
setup_rt_frame_v2(usig, ka, info, set, env); |
1410 |
} else {
|
1411 |
setup_rt_frame_v1(usig, ka, info, set, env); |
1412 |
} |
1413 |
} |
1414 |
|
1415 |
static int |
1416 |
restore_sigcontext(CPUState *env, struct target_sigcontext *sc)
|
1417 |
{ |
1418 |
int err = 0; |
1419 |
uint32_t cpsr; |
1420 |
|
1421 |
__get_user_error(env->regs[0], &sc->arm_r0, err);
|
1422 |
__get_user_error(env->regs[1], &sc->arm_r1, err);
|
1423 |
__get_user_error(env->regs[2], &sc->arm_r2, err);
|
1424 |
__get_user_error(env->regs[3], &sc->arm_r3, err);
|
1425 |
__get_user_error(env->regs[4], &sc->arm_r4, err);
|
1426 |
__get_user_error(env->regs[5], &sc->arm_r5, err);
|
1427 |
__get_user_error(env->regs[6], &sc->arm_r6, err);
|
1428 |
__get_user_error(env->regs[7], &sc->arm_r7, err);
|
1429 |
__get_user_error(env->regs[8], &sc->arm_r8, err);
|
1430 |
__get_user_error(env->regs[9], &sc->arm_r9, err);
|
1431 |
__get_user_error(env->regs[10], &sc->arm_r10, err);
|
1432 |
__get_user_error(env->regs[11], &sc->arm_fp, err);
|
1433 |
__get_user_error(env->regs[12], &sc->arm_ip, err);
|
1434 |
__get_user_error(env->regs[13], &sc->arm_sp, err);
|
1435 |
__get_user_error(env->regs[14], &sc->arm_lr, err);
|
1436 |
__get_user_error(env->regs[15], &sc->arm_pc, err);
|
1437 |
#ifdef TARGET_CONFIG_CPU_32
|
1438 |
__get_user_error(cpsr, &sc->arm_cpsr, err); |
1439 |
cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC); |
1440 |
#endif
|
1441 |
|
1442 |
err |= !valid_user_regs(env); |
1443 |
|
1444 |
return err;
|
1445 |
} |
1446 |
|
1447 |
static long do_sigreturn_v1(CPUState *env) |
1448 |
{ |
1449 |
abi_ulong frame_addr; |
1450 |
struct sigframe_v1 *frame;
|
1451 |
target_sigset_t set; |
1452 |
sigset_t host_set; |
1453 |
int i;
|
1454 |
|
1455 |
/*
|
1456 |
* Since we stacked the signal on a 64-bit boundary,
|
1457 |
* then 'sp' should be word aligned here. If it's
|
1458 |
* not, then the user is trying to mess with us.
|
1459 |
*/
|
1460 |
if (env->regs[13] & 7) |
1461 |
goto badframe;
|
1462 |
|
1463 |
frame_addr = env->regs[13];
|
1464 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
1465 |
goto badframe;
|
1466 |
|
1467 |
if (__get_user(set.sig[0], &frame->sc.oldmask)) |
1468 |
goto badframe;
|
1469 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
1470 |
if (__get_user(set.sig[i], &frame->extramask[i - 1])) |
1471 |
goto badframe;
|
1472 |
} |
1473 |
|
1474 |
target_to_host_sigset_internal(&host_set, &set); |
1475 |
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
1476 |
|
1477 |
if (restore_sigcontext(env, &frame->sc))
|
1478 |
goto badframe;
|
1479 |
|
1480 |
#if 0
|
1481 |
/* Send SIGTRAP if we're single-stepping */
|
1482 |
if (ptrace_cancel_bpt(current))
|
1483 |
send_sig(SIGTRAP, current, 1);
|
1484 |
#endif
|
1485 |
unlock_user_struct(frame, frame_addr, 0);
|
1486 |
return env->regs[0]; |
1487 |
|
1488 |
badframe:
|
1489 |
unlock_user_struct(frame, frame_addr, 0);
|
1490 |
force_sig(SIGSEGV /* , current */);
|
1491 |
return 0; |
1492 |
} |
1493 |
|
1494 |
static int do_sigframe_return_v2(CPUState *env, target_ulong frame_addr, |
1495 |
struct target_ucontext_v2 *uc)
|
1496 |
{ |
1497 |
sigset_t host_set; |
1498 |
|
1499 |
target_to_host_sigset(&host_set, &uc->tuc_sigmask); |
1500 |
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
1501 |
|
1502 |
if (restore_sigcontext(env, &uc->tuc_mcontext))
|
1503 |
return 1; |
1504 |
|
1505 |
if (do_sigaltstack(frame_addr + offsetof(struct target_ucontext_v2, tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) |
1506 |
return 1; |
1507 |
|
1508 |
#if 0
|
1509 |
/* Send SIGTRAP if we're single-stepping */
|
1510 |
if (ptrace_cancel_bpt(current))
|
1511 |
send_sig(SIGTRAP, current, 1);
|
1512 |
#endif
|
1513 |
|
1514 |
return 0; |
1515 |
} |
1516 |
|
1517 |
static long do_sigreturn_v2(CPUState *env) |
1518 |
{ |
1519 |
abi_ulong frame_addr; |
1520 |
struct sigframe_v2 *frame;
|
1521 |
|
1522 |
/*
|
1523 |
* Since we stacked the signal on a 64-bit boundary,
|
1524 |
* then 'sp' should be word aligned here. If it's
|
1525 |
* not, then the user is trying to mess with us.
|
1526 |
*/
|
1527 |
if (env->regs[13] & 7) |
1528 |
goto badframe;
|
1529 |
|
1530 |
frame_addr = env->regs[13];
|
1531 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
1532 |
goto badframe;
|
1533 |
|
1534 |
if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
|
1535 |
goto badframe;
|
1536 |
|
1537 |
unlock_user_struct(frame, frame_addr, 0);
|
1538 |
return env->regs[0]; |
1539 |
|
1540 |
badframe:
|
1541 |
unlock_user_struct(frame, frame_addr, 0);
|
1542 |
force_sig(SIGSEGV /* , current */);
|
1543 |
return 0; |
1544 |
} |
1545 |
|
1546 |
long do_sigreturn(CPUState *env)
|
1547 |
{ |
1548 |
if (get_osversion() >= 0x020612) { |
1549 |
return do_sigreturn_v2(env);
|
1550 |
} else {
|
1551 |
return do_sigreturn_v1(env);
|
1552 |
} |
1553 |
} |
1554 |
|
1555 |
static long do_rt_sigreturn_v1(CPUState *env) |
1556 |
{ |
1557 |
abi_ulong frame_addr; |
1558 |
struct rt_sigframe_v1 *frame;
|
1559 |
sigset_t host_set; |
1560 |
|
1561 |
/*
|
1562 |
* Since we stacked the signal on a 64-bit boundary,
|
1563 |
* then 'sp' should be word aligned here. If it's
|
1564 |
* not, then the user is trying to mess with us.
|
1565 |
*/
|
1566 |
if (env->regs[13] & 7) |
1567 |
goto badframe;
|
1568 |
|
1569 |
frame_addr = env->regs[13];
|
1570 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
1571 |
goto badframe;
|
1572 |
|
1573 |
target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask); |
1574 |
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
1575 |
|
1576 |
if (restore_sigcontext(env, &frame->uc.tuc_mcontext))
|
1577 |
goto badframe;
|
1578 |
|
1579 |
if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) |
1580 |
goto badframe;
|
1581 |
|
1582 |
#if 0
|
1583 |
/* Send SIGTRAP if we're single-stepping */
|
1584 |
if (ptrace_cancel_bpt(current))
|
1585 |
send_sig(SIGTRAP, current, 1);
|
1586 |
#endif
|
1587 |
unlock_user_struct(frame, frame_addr, 0);
|
1588 |
return env->regs[0]; |
1589 |
|
1590 |
badframe:
|
1591 |
unlock_user_struct(frame, frame_addr, 0);
|
1592 |
force_sig(SIGSEGV /* , current */);
|
1593 |
return 0; |
1594 |
} |
1595 |
|
1596 |
static long do_rt_sigreturn_v2(CPUState *env) |
1597 |
{ |
1598 |
abi_ulong frame_addr; |
1599 |
struct rt_sigframe_v2 *frame;
|
1600 |
|
1601 |
/*
|
1602 |
* Since we stacked the signal on a 64-bit boundary,
|
1603 |
* then 'sp' should be word aligned here. If it's
|
1604 |
* not, then the user is trying to mess with us.
|
1605 |
*/
|
1606 |
if (env->regs[13] & 7) |
1607 |
goto badframe;
|
1608 |
|
1609 |
frame_addr = env->regs[13];
|
1610 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
1611 |
goto badframe;
|
1612 |
|
1613 |
if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
|
1614 |
goto badframe;
|
1615 |
|
1616 |
unlock_user_struct(frame, frame_addr, 0);
|
1617 |
return env->regs[0]; |
1618 |
|
1619 |
badframe:
|
1620 |
unlock_user_struct(frame, frame_addr, 0);
|
1621 |
force_sig(SIGSEGV /* , current */);
|
1622 |
return 0; |
1623 |
} |
1624 |
|
1625 |
long do_rt_sigreturn(CPUState *env)
|
1626 |
{ |
1627 |
if (get_osversion() >= 0x020612) { |
1628 |
return do_rt_sigreturn_v2(env);
|
1629 |
} else {
|
1630 |
return do_rt_sigreturn_v1(env);
|
1631 |
} |
1632 |
} |
1633 |
|
1634 |
#elif defined(TARGET_SPARC)
|
1635 |
|
1636 |
#define __SUNOS_MAXWIN 31 |
1637 |
|
1638 |
/* This is what SunOS does, so shall I. */
|
1639 |
struct target_sigcontext {
|
1640 |
abi_ulong sigc_onstack; /* state to restore */
|
1641 |
|
1642 |
abi_ulong sigc_mask; /* sigmask to restore */
|
1643 |
abi_ulong sigc_sp; /* stack pointer */
|
1644 |
abi_ulong sigc_pc; /* program counter */
|
1645 |
abi_ulong sigc_npc; /* next program counter */
|
1646 |
abi_ulong sigc_psr; /* for condition codes etc */
|
1647 |
abi_ulong sigc_g1; /* User uses these two registers */
|
1648 |
abi_ulong sigc_o0; /* within the trampoline code. */
|
1649 |
|
1650 |
/* Now comes information regarding the users window set
|
1651 |
* at the time of the signal.
|
1652 |
*/
|
1653 |
abi_ulong sigc_oswins; /* outstanding windows */
|
1654 |
|
1655 |
/* stack ptrs for each regwin buf */
|
1656 |
char *sigc_spbuf[__SUNOS_MAXWIN];
|
1657 |
|
1658 |
/* Windows to restore after signal */
|
1659 |
struct {
|
1660 |
abi_ulong locals[8];
|
1661 |
abi_ulong ins[8];
|
1662 |
} sigc_wbuf[__SUNOS_MAXWIN]; |
1663 |
}; |
1664 |
/* A Sparc stack frame */
|
1665 |
struct sparc_stackf {
|
1666 |
abi_ulong locals[8];
|
1667 |
abi_ulong ins[6];
|
1668 |
struct sparc_stackf *fp;
|
1669 |
abi_ulong callers_pc; |
1670 |
char *structptr;
|
1671 |
abi_ulong xargs[6];
|
1672 |
abi_ulong xxargs[1];
|
1673 |
}; |
1674 |
|
1675 |
typedef struct { |
1676 |
struct {
|
1677 |
abi_ulong psr; |
1678 |
abi_ulong pc; |
1679 |
abi_ulong npc; |
1680 |
abi_ulong y; |
1681 |
abi_ulong u_regs[16]; /* globals and ins */ |
1682 |
} si_regs; |
1683 |
int si_mask;
|
1684 |
} __siginfo_t; |
1685 |
|
1686 |
typedef struct { |
1687 |
unsigned long si_float_regs [32]; |
1688 |
unsigned long si_fsr; |
1689 |
unsigned long si_fpqdepth; |
1690 |
struct {
|
1691 |
unsigned long *insn_addr; |
1692 |
unsigned long insn; |
1693 |
} si_fpqueue [16];
|
1694 |
} qemu_siginfo_fpu_t; |
1695 |
|
1696 |
|
1697 |
struct target_signal_frame {
|
1698 |
struct sparc_stackf ss;
|
1699 |
__siginfo_t info; |
1700 |
abi_ulong fpu_save; |
1701 |
abi_ulong insns[2] __attribute__ ((aligned (8))); |
1702 |
abi_ulong extramask[TARGET_NSIG_WORDS - 1];
|
1703 |
abi_ulong extra_size; /* Should be 0 */
|
1704 |
qemu_siginfo_fpu_t fpu_state; |
1705 |
}; |
1706 |
struct target_rt_signal_frame {
|
1707 |
struct sparc_stackf ss;
|
1708 |
siginfo_t info; |
1709 |
abi_ulong regs[20];
|
1710 |
sigset_t mask; |
1711 |
abi_ulong fpu_save; |
1712 |
unsigned int insns[2]; |
1713 |
stack_t stack; |
1714 |
unsigned int extra_size; /* Should be 0 */ |
1715 |
qemu_siginfo_fpu_t fpu_state; |
1716 |
}; |
1717 |
|
1718 |
#define UREG_O0 16 |
1719 |
#define UREG_O6 22 |
1720 |
#define UREG_I0 0 |
1721 |
#define UREG_I1 1 |
1722 |
#define UREG_I2 2 |
1723 |
#define UREG_I3 3 |
1724 |
#define UREG_I4 4 |
1725 |
#define UREG_I5 5 |
1726 |
#define UREG_I6 6 |
1727 |
#define UREG_I7 7 |
1728 |
#define UREG_L0 8 |
1729 |
#define UREG_FP UREG_I6
|
1730 |
#define UREG_SP UREG_O6
|
1731 |
|
1732 |
static inline abi_ulong get_sigframe(struct target_sigaction *sa, |
1733 |
CPUState *env, unsigned long framesize) |
1734 |
{ |
1735 |
abi_ulong sp; |
1736 |
|
1737 |
sp = env->regwptr[UREG_FP]; |
1738 |
|
1739 |
/* This is the X/Open sanctioned signal stack switching. */
|
1740 |
if (sa->sa_flags & TARGET_SA_ONSTACK) {
|
1741 |
if (!on_sig_stack(sp)
|
1742 |
&& !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7))
|
1743 |
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
1744 |
} |
1745 |
return sp - framesize;
|
1746 |
} |
1747 |
|
1748 |
static int |
1749 |
setup___siginfo(__siginfo_t *si, CPUState *env, abi_ulong mask) |
1750 |
{ |
1751 |
int err = 0, i; |
1752 |
|
1753 |
err |= __put_user(env->psr, &si->si_regs.psr); |
1754 |
err |= __put_user(env->pc, &si->si_regs.pc); |
1755 |
err |= __put_user(env->npc, &si->si_regs.npc); |
1756 |
err |= __put_user(env->y, &si->si_regs.y); |
1757 |
for (i=0; i < 8; i++) { |
1758 |
err |= __put_user(env->gregs[i], &si->si_regs.u_regs[i]); |
1759 |
} |
1760 |
for (i=0; i < 8; i++) { |
1761 |
err |= __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]);
|
1762 |
} |
1763 |
err |= __put_user(mask, &si->si_mask); |
1764 |
return err;
|
1765 |
} |
1766 |
|
1767 |
#if 0
|
1768 |
static int
|
1769 |
setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
|
1770 |
CPUState *env, unsigned long mask)
|
1771 |
{
|
1772 |
int err = 0;
|
1773 |
|
1774 |
err |= __put_user(mask, &sc->sigc_mask);
|
1775 |
err |= __put_user(env->regwptr[UREG_SP], &sc->sigc_sp);
|
1776 |
err |= __put_user(env->pc, &sc->sigc_pc);
|
1777 |
err |= __put_user(env->npc, &sc->sigc_npc);
|
1778 |
err |= __put_user(env->psr, &sc->sigc_psr);
|
1779 |
err |= __put_user(env->gregs[1], &sc->sigc_g1);
|
1780 |
err |= __put_user(env->regwptr[UREG_O0], &sc->sigc_o0);
|
1781 |
|
1782 |
return err;
|
1783 |
}
|
1784 |
#endif
|
1785 |
#define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7))) |
1786 |
|
1787 |
static void setup_frame(int sig, struct target_sigaction *ka, |
1788 |
target_sigset_t *set, CPUState *env) |
1789 |
{ |
1790 |
abi_ulong sf_addr; |
1791 |
struct target_signal_frame *sf;
|
1792 |
int sigframe_size, err, i;
|
1793 |
|
1794 |
/* 1. Make sure everything is clean */
|
1795 |
//synchronize_user_stack();
|
1796 |
|
1797 |
sigframe_size = NF_ALIGNEDSZ; |
1798 |
sf_addr = get_sigframe(ka, env, sigframe_size); |
1799 |
|
1800 |
sf = lock_user(VERIFY_WRITE, sf_addr, |
1801 |
sizeof(struct target_signal_frame), 0); |
1802 |
if (!sf)
|
1803 |
goto sigsegv;
|
1804 |
|
1805 |
//fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
|
1806 |
#if 0
|
1807 |
if (invalid_frame_pointer(sf, sigframe_size))
|
1808 |
goto sigill_and_return;
|
1809 |
#endif
|
1810 |
/* 2. Save the current process state */
|
1811 |
err = setup___siginfo(&sf->info, env, set->sig[0]);
|
1812 |
err |= __put_user(0, &sf->extra_size);
|
1813 |
|
1814 |
//err |= save_fpu_state(regs, &sf->fpu_state);
|
1815 |
//err |= __put_user(&sf->fpu_state, &sf->fpu_save);
|
1816 |
|
1817 |
err |= __put_user(set->sig[0], &sf->info.si_mask);
|
1818 |
for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) { |
1819 |
err |= __put_user(set->sig[i + 1], &sf->extramask[i]);
|
1820 |
} |
1821 |
|
1822 |
for (i = 0; i < 8; i++) { |
1823 |
err |= __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]); |
1824 |
} |
1825 |
for (i = 0; i < 8; i++) { |
1826 |
err |= __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]); |
1827 |
} |
1828 |
if (err)
|
1829 |
goto sigsegv;
|
1830 |
|
1831 |
/* 3. signal handler back-trampoline and parameters */
|
1832 |
env->regwptr[UREG_FP] = sf_addr; |
1833 |
env->regwptr[UREG_I0] = sig; |
1834 |
env->regwptr[UREG_I1] = sf_addr + |
1835 |
offsetof(struct target_signal_frame, info);
|
1836 |
env->regwptr[UREG_I2] = sf_addr + |
1837 |
offsetof(struct target_signal_frame, info);
|
1838 |
|
1839 |
/* 4. signal handler */
|
1840 |
env->pc = ka->_sa_handler; |
1841 |
env->npc = (env->pc + 4);
|
1842 |
/* 5. return to kernel instructions */
|
1843 |
if (ka->sa_restorer)
|
1844 |
env->regwptr[UREG_I7] = ka->sa_restorer; |
1845 |
else {
|
1846 |
uint32_t val32; |
1847 |
|
1848 |
env->regwptr[UREG_I7] = sf_addr + |
1849 |
offsetof(struct target_signal_frame, insns) - 2 * 4; |
1850 |
|
1851 |
/* mov __NR_sigreturn, %g1 */
|
1852 |
val32 = 0x821020d8;
|
1853 |
err |= __put_user(val32, &sf->insns[0]);
|
1854 |
|
1855 |
/* t 0x10 */
|
1856 |
val32 = 0x91d02010;
|
1857 |
err |= __put_user(val32, &sf->insns[1]);
|
1858 |
if (err)
|
1859 |
goto sigsegv;
|
1860 |
|
1861 |
/* Flush instruction space. */
|
1862 |
//flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
|
1863 |
// tb_flush(env);
|
1864 |
} |
1865 |
unlock_user(sf, sf_addr, sizeof(struct target_signal_frame)); |
1866 |
return;
|
1867 |
#if 0
|
1868 |
sigill_and_return:
|
1869 |
force_sig(TARGET_SIGILL);
|
1870 |
#endif
|
1871 |
sigsegv:
|
1872 |
//fprintf(stderr, "force_sig\n");
|
1873 |
unlock_user(sf, sf_addr, sizeof(struct target_signal_frame)); |
1874 |
force_sig(TARGET_SIGSEGV); |
1875 |
} |
1876 |
static inline int |
1877 |
restore_fpu_state(CPUState *env, qemu_siginfo_fpu_t *fpu) |
1878 |
{ |
1879 |
int err;
|
1880 |
#if 0
|
1881 |
#ifdef CONFIG_SMP
|
1882 |
if (current->flags & PF_USEDFPU)
|
1883 |
regs->psr &= ~PSR_EF;
|
1884 |
#else
|
1885 |
if (current == last_task_used_math) {
|
1886 |
last_task_used_math = 0;
|
1887 |
regs->psr &= ~PSR_EF; |
1888 |
} |
1889 |
#endif
|
1890 |
current->used_math = 1;
|
1891 |
current->flags &= ~PF_USEDFPU; |
1892 |
#endif
|
1893 |
#if 0
|
1894 |
if (verify_area (VERIFY_READ, fpu, sizeof(*fpu)))
|
1895 |
return -EFAULT;
|
1896 |
#endif
|
1897 |
|
1898 |
#if 0
|
1899 |
/* XXX: incorrect */
|
1900 |
err = __copy_from_user(&env->fpr[0], &fpu->si_float_regs[0],
|
1901 |
(sizeof(unsigned long) * 32));
|
1902 |
#endif
|
1903 |
err |= __get_user(env->fsr, &fpu->si_fsr); |
1904 |
#if 0
|
1905 |
err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
|
1906 |
if (current->thread.fpqdepth != 0)
|
1907 |
err |= __copy_from_user(¤t->thread.fpqueue[0],
|
1908 |
&fpu->si_fpqueue[0],
|
1909 |
((sizeof(unsigned long) +
|
1910 |
(sizeof(unsigned long *)))*16));
|
1911 |
#endif
|
1912 |
return err;
|
1913 |
} |
1914 |
|
1915 |
|
1916 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
1917 |
target_siginfo_t *info, |
1918 |
target_sigset_t *set, CPUState *env) |
1919 |
{ |
1920 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
1921 |
} |
1922 |
|
1923 |
long do_sigreturn(CPUState *env)
|
1924 |
{ |
1925 |
abi_ulong sf_addr; |
1926 |
struct target_signal_frame *sf;
|
1927 |
uint32_t up_psr, pc, npc; |
1928 |
target_sigset_t set; |
1929 |
sigset_t host_set; |
1930 |
abi_ulong fpu_save_addr; |
1931 |
int err, i;
|
1932 |
|
1933 |
sf_addr = env->regwptr[UREG_FP]; |
1934 |
if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1)) |
1935 |
goto segv_and_exit;
|
1936 |
#if 0
|
1937 |
fprintf(stderr, "sigreturn\n");
|
1938 |
fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
|
1939 |
#endif
|
1940 |
//cpu_dump_state(env, stderr, fprintf, 0);
|
1941 |
|
1942 |
/* 1. Make sure we are not getting garbage from the user */
|
1943 |
|
1944 |
if (sf_addr & 3) |
1945 |
goto segv_and_exit;
|
1946 |
|
1947 |
err = __get_user(pc, &sf->info.si_regs.pc); |
1948 |
err |= __get_user(npc, &sf->info.si_regs.npc); |
1949 |
|
1950 |
if ((pc | npc) & 3) |
1951 |
goto segv_and_exit;
|
1952 |
|
1953 |
/* 2. Restore the state */
|
1954 |
err |= __get_user(up_psr, &sf->info.si_regs.psr); |
1955 |
|
1956 |
/* User can only change condition codes and FPU enabling in %psr. */
|
1957 |
env->psr = (up_psr & (PSR_ICC /* | PSR_EF */))
|
1958 |
| (env->psr & ~(PSR_ICC /* | PSR_EF */));
|
1959 |
|
1960 |
env->pc = pc; |
1961 |
env->npc = npc; |
1962 |
err |= __get_user(env->y, &sf->info.si_regs.y); |
1963 |
for (i=0; i < 8; i++) { |
1964 |
err |= __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]); |
1965 |
} |
1966 |
for (i=0; i < 8; i++) { |
1967 |
err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]);
|
1968 |
} |
1969 |
|
1970 |
err |= __get_user(fpu_save_addr, &sf->fpu_save); |
1971 |
|
1972 |
//if (fpu_save)
|
1973 |
// err |= restore_fpu_state(env, fpu_save);
|
1974 |
|
1975 |
/* This is pretty much atomic, no amount locking would prevent
|
1976 |
* the races which exist anyways.
|
1977 |
*/
|
1978 |
err |= __get_user(set.sig[0], &sf->info.si_mask);
|
1979 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
1980 |
err |= (__get_user(set.sig[i], &sf->extramask[i - 1]));
|
1981 |
} |
1982 |
|
1983 |
target_to_host_sigset_internal(&host_set, &set); |
1984 |
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
1985 |
|
1986 |
if (err)
|
1987 |
goto segv_and_exit;
|
1988 |
unlock_user_struct(sf, sf_addr, 0);
|
1989 |
return env->regwptr[0]; |
1990 |
|
1991 |
segv_and_exit:
|
1992 |
unlock_user_struct(sf, sf_addr, 0);
|
1993 |
force_sig(TARGET_SIGSEGV); |
1994 |
} |
1995 |
|
1996 |
long do_rt_sigreturn(CPUState *env)
|
1997 |
{ |
1998 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
1999 |
return -TARGET_ENOSYS;
|
2000 |
} |
2001 |
|
2002 |
#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
|
2003 |
#define MC_TSTATE 0 |
2004 |
#define MC_PC 1 |
2005 |
#define MC_NPC 2 |
2006 |
#define MC_Y 3 |
2007 |
#define MC_G1 4 |
2008 |
#define MC_G2 5 |
2009 |
#define MC_G3 6 |
2010 |
#define MC_G4 7 |
2011 |
#define MC_G5 8 |
2012 |
#define MC_G6 9 |
2013 |
#define MC_G7 10 |
2014 |
#define MC_O0 11 |
2015 |
#define MC_O1 12 |
2016 |
#define MC_O2 13 |
2017 |
#define MC_O3 14 |
2018 |
#define MC_O4 15 |
2019 |
#define MC_O5 16 |
2020 |
#define MC_O6 17 |
2021 |
#define MC_O7 18 |
2022 |
#define MC_NGREG 19 |
2023 |
|
2024 |
typedef abi_ulong target_mc_greg_t;
|
2025 |
typedef target_mc_greg_t target_mc_gregset_t[MC_NGREG];
|
2026 |
|
2027 |
struct target_mc_fq {
|
2028 |
abi_ulong *mcfq_addr; |
2029 |
uint32_t mcfq_insn; |
2030 |
}; |
2031 |
|
2032 |
struct target_mc_fpu {
|
2033 |
union {
|
2034 |
uint32_t sregs[32];
|
2035 |
uint64_t dregs[32];
|
2036 |
//uint128_t qregs[16];
|
2037 |
} mcfpu_fregs; |
2038 |
abi_ulong mcfpu_fsr; |
2039 |
abi_ulong mcfpu_fprs; |
2040 |
abi_ulong mcfpu_gsr; |
2041 |
struct target_mc_fq *mcfpu_fq;
|
2042 |
unsigned char mcfpu_qcnt; |
2043 |
unsigned char mcfpu_qentsz; |
2044 |
unsigned char mcfpu_enab; |
2045 |
}; |
2046 |
typedef struct target_mc_fpu target_mc_fpu_t; |
2047 |
|
2048 |
typedef struct { |
2049 |
target_mc_gregset_t mc_gregs; |
2050 |
target_mc_greg_t mc_fp; |
2051 |
target_mc_greg_t mc_i7; |
2052 |
target_mc_fpu_t mc_fpregs; |
2053 |
} target_mcontext_t; |
2054 |
|
2055 |
struct target_ucontext {
|
2056 |
struct target_ucontext *uc_link;
|
2057 |
abi_ulong uc_flags; |
2058 |
target_sigset_t uc_sigmask; |
2059 |
target_mcontext_t uc_mcontext; |
2060 |
}; |
2061 |
|
2062 |
/* A V9 register window */
|
2063 |
struct target_reg_window {
|
2064 |
abi_ulong locals[8];
|
2065 |
abi_ulong ins[8];
|
2066 |
}; |
2067 |
|
2068 |
#define TARGET_STACK_BIAS 2047 |
2069 |
|
2070 |
/* {set, get}context() needed for 64-bit SparcLinux userland. */
|
2071 |
void sparc64_set_context(CPUSPARCState *env)
|
2072 |
{ |
2073 |
abi_ulong ucp_addr; |
2074 |
struct target_ucontext *ucp;
|
2075 |
target_mc_gregset_t *grp; |
2076 |
abi_ulong pc, npc, tstate; |
2077 |
abi_ulong fp, i7, w_addr; |
2078 |
unsigned char fenab; |
2079 |
int err;
|
2080 |
unsigned int i; |
2081 |
|
2082 |
ucp_addr = env->regwptr[UREG_I0]; |
2083 |
if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1)) |
2084 |
goto do_sigsegv;
|
2085 |
grp = &ucp->uc_mcontext.mc_gregs; |
2086 |
err = __get_user(pc, &((*grp)[MC_PC])); |
2087 |
err |= __get_user(npc, &((*grp)[MC_NPC])); |
2088 |
if (err || ((pc | npc) & 3)) |
2089 |
goto do_sigsegv;
|
2090 |
if (env->regwptr[UREG_I1]) {
|
2091 |
target_sigset_t target_set; |
2092 |
sigset_t set; |
2093 |
|
2094 |
if (TARGET_NSIG_WORDS == 1) { |
2095 |
if (__get_user(target_set.sig[0], &ucp->uc_sigmask.sig[0])) |
2096 |
goto do_sigsegv;
|
2097 |
} else {
|
2098 |
abi_ulong *src, *dst; |
2099 |
src = ucp->uc_sigmask.sig; |
2100 |
dst = target_set.sig; |
2101 |
for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong); |
2102 |
i++, dst++, src++) |
2103 |
err |= __get_user(*dst, src); |
2104 |
if (err)
|
2105 |
goto do_sigsegv;
|
2106 |
} |
2107 |
target_to_host_sigset_internal(&set, &target_set); |
2108 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
2109 |
} |
2110 |
env->pc = pc; |
2111 |
env->npc = npc; |
2112 |
err |= __get_user(env->y, &((*grp)[MC_Y])); |
2113 |
err |= __get_user(tstate, &((*grp)[MC_TSTATE])); |
2114 |
env->asi = (tstate >> 24) & 0xff; |
2115 |
PUT_CCR(env, tstate >> 32);
|
2116 |
PUT_CWP64(env, tstate & 0x1f);
|
2117 |
err |= __get_user(env->gregs[1], (&(*grp)[MC_G1]));
|
2118 |
err |= __get_user(env->gregs[2], (&(*grp)[MC_G2]));
|
2119 |
err |= __get_user(env->gregs[3], (&(*grp)[MC_G3]));
|
2120 |
err |= __get_user(env->gregs[4], (&(*grp)[MC_G4]));
|
2121 |
err |= __get_user(env->gregs[5], (&(*grp)[MC_G5]));
|
2122 |
err |= __get_user(env->gregs[6], (&(*grp)[MC_G6]));
|
2123 |
err |= __get_user(env->gregs[7], (&(*grp)[MC_G7]));
|
2124 |
err |= __get_user(env->regwptr[UREG_I0], (&(*grp)[MC_O0])); |
2125 |
err |= __get_user(env->regwptr[UREG_I1], (&(*grp)[MC_O1])); |
2126 |
err |= __get_user(env->regwptr[UREG_I2], (&(*grp)[MC_O2])); |
2127 |
err |= __get_user(env->regwptr[UREG_I3], (&(*grp)[MC_O3])); |
2128 |
err |= __get_user(env->regwptr[UREG_I4], (&(*grp)[MC_O4])); |
2129 |
err |= __get_user(env->regwptr[UREG_I5], (&(*grp)[MC_O5])); |
2130 |
err |= __get_user(env->regwptr[UREG_I6], (&(*grp)[MC_O6])); |
2131 |
err |= __get_user(env->regwptr[UREG_I7], (&(*grp)[MC_O7])); |
2132 |
|
2133 |
err |= __get_user(fp, &(ucp->uc_mcontext.mc_fp)); |
2134 |
err |= __get_user(i7, &(ucp->uc_mcontext.mc_i7)); |
2135 |
|
2136 |
w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6]; |
2137 |
if (put_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]), |
2138 |
abi_ulong) != 0)
|
2139 |
goto do_sigsegv;
|
2140 |
if (put_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]), |
2141 |
abi_ulong) != 0)
|
2142 |
goto do_sigsegv;
|
2143 |
err |= __get_user(fenab, &(ucp->uc_mcontext.mc_fpregs.mcfpu_enab)); |
2144 |
err |= __get_user(env->fprs, &(ucp->uc_mcontext.mc_fpregs.mcfpu_fprs)); |
2145 |
{ |
2146 |
uint32_t *src, *dst; |
2147 |
src = ucp->uc_mcontext.mc_fpregs.mcfpu_fregs.sregs; |
2148 |
dst = env->fpr; |
2149 |
/* XXX: check that the CPU storage is the same as user context */
|
2150 |
for (i = 0; i < 64; i++, dst++, src++) |
2151 |
err |= __get_user(*dst, src); |
2152 |
} |
2153 |
err |= __get_user(env->fsr, |
2154 |
&(ucp->uc_mcontext.mc_fpregs.mcfpu_fsr)); |
2155 |
err |= __get_user(env->gsr, |
2156 |
&(ucp->uc_mcontext.mc_fpregs.mcfpu_gsr)); |
2157 |
if (err)
|
2158 |
goto do_sigsegv;
|
2159 |
unlock_user_struct(ucp, ucp_addr, 0);
|
2160 |
return;
|
2161 |
do_sigsegv:
|
2162 |
unlock_user_struct(ucp, ucp_addr, 0);
|
2163 |
force_sig(SIGSEGV); |
2164 |
} |
2165 |
|
2166 |
void sparc64_get_context(CPUSPARCState *env)
|
2167 |
{ |
2168 |
abi_ulong ucp_addr; |
2169 |
struct target_ucontext *ucp;
|
2170 |
target_mc_gregset_t *grp; |
2171 |
target_mcontext_t *mcp; |
2172 |
abi_ulong fp, i7, w_addr; |
2173 |
int err;
|
2174 |
unsigned int i; |
2175 |
target_sigset_t target_set; |
2176 |
sigset_t set; |
2177 |
|
2178 |
ucp_addr = env->regwptr[UREG_I0]; |
2179 |
if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0)) |
2180 |
goto do_sigsegv;
|
2181 |
|
2182 |
mcp = &ucp->uc_mcontext; |
2183 |
grp = &mcp->mc_gregs; |
2184 |
|
2185 |
/* Skip over the trap instruction, first. */
|
2186 |
env->pc = env->npc; |
2187 |
env->npc += 4;
|
2188 |
|
2189 |
err = 0;
|
2190 |
|
2191 |
sigprocmask(0, NULL, &set); |
2192 |
host_to_target_sigset_internal(&target_set, &set); |
2193 |
if (TARGET_NSIG_WORDS == 1) { |
2194 |
err |= __put_user(target_set.sig[0],
|
2195 |
(abi_ulong *)&ucp->uc_sigmask); |
2196 |
} else {
|
2197 |
abi_ulong *src, *dst; |
2198 |
src = target_set.sig; |
2199 |
dst = ucp->uc_sigmask.sig; |
2200 |
for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong); |
2201 |
i++, dst++, src++) |
2202 |
err |= __put_user(*src, dst); |
2203 |
if (err)
|
2204 |
goto do_sigsegv;
|
2205 |
} |
2206 |
|
2207 |
/* XXX: tstate must be saved properly */
|
2208 |
// err |= __put_user(env->tstate, &((*grp)[MC_TSTATE]));
|
2209 |
err |= __put_user(env->pc, &((*grp)[MC_PC])); |
2210 |
err |= __put_user(env->npc, &((*grp)[MC_NPC])); |
2211 |
err |= __put_user(env->y, &((*grp)[MC_Y])); |
2212 |
err |= __put_user(env->gregs[1], &((*grp)[MC_G1]));
|
2213 |
err |= __put_user(env->gregs[2], &((*grp)[MC_G2]));
|
2214 |
err |= __put_user(env->gregs[3], &((*grp)[MC_G3]));
|
2215 |
err |= __put_user(env->gregs[4], &((*grp)[MC_G4]));
|
2216 |
err |= __put_user(env->gregs[5], &((*grp)[MC_G5]));
|
2217 |
err |= __put_user(env->gregs[6], &((*grp)[MC_G6]));
|
2218 |
err |= __put_user(env->gregs[7], &((*grp)[MC_G7]));
|
2219 |
err |= __put_user(env->regwptr[UREG_I0], &((*grp)[MC_O0])); |
2220 |
err |= __put_user(env->regwptr[UREG_I1], &((*grp)[MC_O1])); |
2221 |
err |= __put_user(env->regwptr[UREG_I2], &((*grp)[MC_O2])); |
2222 |
err |= __put_user(env->regwptr[UREG_I3], &((*grp)[MC_O3])); |
2223 |
err |= __put_user(env->regwptr[UREG_I4], &((*grp)[MC_O4])); |
2224 |
err |= __put_user(env->regwptr[UREG_I5], &((*grp)[MC_O5])); |
2225 |
err |= __put_user(env->regwptr[UREG_I6], &((*grp)[MC_O6])); |
2226 |
err |= __put_user(env->regwptr[UREG_I7], &((*grp)[MC_O7])); |
2227 |
|
2228 |
w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6]; |
2229 |
fp = i7 = 0;
|
2230 |
if (get_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]), |
2231 |
abi_ulong) != 0)
|
2232 |
goto do_sigsegv;
|
2233 |
if (get_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]), |
2234 |
abi_ulong) != 0)
|
2235 |
goto do_sigsegv;
|
2236 |
err |= __put_user(fp, &(mcp->mc_fp)); |
2237 |
err |= __put_user(i7, &(mcp->mc_i7)); |
2238 |
|
2239 |
{ |
2240 |
uint32_t *src, *dst; |
2241 |
src = env->fpr; |
2242 |
dst = ucp->uc_mcontext.mc_fpregs.mcfpu_fregs.sregs; |
2243 |
/* XXX: check that the CPU storage is the same as user context */
|
2244 |
for (i = 0; i < 64; i++, dst++, src++) |
2245 |
err |= __put_user(*src, dst); |
2246 |
} |
2247 |
err |= __put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr)); |
2248 |
err |= __put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr)); |
2249 |
err |= __put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs)); |
2250 |
|
2251 |
if (err)
|
2252 |
goto do_sigsegv;
|
2253 |
unlock_user_struct(ucp, ucp_addr, 1);
|
2254 |
return;
|
2255 |
do_sigsegv:
|
2256 |
unlock_user_struct(ucp, ucp_addr, 1);
|
2257 |
force_sig(SIGSEGV); |
2258 |
} |
2259 |
#endif
|
2260 |
#elif defined(TARGET_ABI_MIPSN64)
|
2261 |
|
2262 |
# warning signal handling not implemented
|
2263 |
|
2264 |
static void setup_frame(int sig, struct target_sigaction *ka, |
2265 |
target_sigset_t *set, CPUState *env) |
2266 |
{ |
2267 |
fprintf(stderr, "setup_frame: not implemented\n");
|
2268 |
} |
2269 |
|
2270 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
2271 |
target_siginfo_t *info, |
2272 |
target_sigset_t *set, CPUState *env) |
2273 |
{ |
2274 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
2275 |
} |
2276 |
|
2277 |
long do_sigreturn(CPUState *env)
|
2278 |
{ |
2279 |
fprintf(stderr, "do_sigreturn: not implemented\n");
|
2280 |
return -TARGET_ENOSYS;
|
2281 |
} |
2282 |
|
2283 |
long do_rt_sigreturn(CPUState *env)
|
2284 |
{ |
2285 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
2286 |
return -TARGET_ENOSYS;
|
2287 |
} |
2288 |
|
2289 |
#elif defined(TARGET_ABI_MIPSN32)
|
2290 |
|
2291 |
# warning signal handling not implemented
|
2292 |
|
2293 |
static void setup_frame(int sig, struct target_sigaction *ka, |
2294 |
target_sigset_t *set, CPUState *env) |
2295 |
{ |
2296 |
fprintf(stderr, "setup_frame: not implemented\n");
|
2297 |
} |
2298 |
|
2299 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
2300 |
target_siginfo_t *info, |
2301 |
target_sigset_t *set, CPUState *env) |
2302 |
{ |
2303 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
2304 |
} |
2305 |
|
2306 |
long do_sigreturn(CPUState *env)
|
2307 |
{ |
2308 |
fprintf(stderr, "do_sigreturn: not implemented\n");
|
2309 |
return -TARGET_ENOSYS;
|
2310 |
} |
2311 |
|
2312 |
long do_rt_sigreturn(CPUState *env)
|
2313 |
{ |
2314 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
2315 |
return -TARGET_ENOSYS;
|
2316 |
} |
2317 |
|
2318 |
#elif defined(TARGET_ABI_MIPSO32)
|
2319 |
|
2320 |
struct target_sigcontext {
|
2321 |
uint32_t sc_regmask; /* Unused */
|
2322 |
uint32_t sc_status; |
2323 |
uint64_t sc_pc; |
2324 |
uint64_t sc_regs[32];
|
2325 |
uint64_t sc_fpregs[32];
|
2326 |
uint32_t sc_ownedfp; /* Unused */
|
2327 |
uint32_t sc_fpc_csr; |
2328 |
uint32_t sc_fpc_eir; /* Unused */
|
2329 |
uint32_t sc_used_math; |
2330 |
uint32_t sc_dsp; /* dsp status, was sc_ssflags */
|
2331 |
uint32_t pad0; |
2332 |
uint64_t sc_mdhi; |
2333 |
uint64_t sc_mdlo; |
2334 |
target_ulong sc_hi1; /* Was sc_cause */
|
2335 |
target_ulong sc_lo1; /* Was sc_badvaddr */
|
2336 |
target_ulong sc_hi2; /* Was sc_sigset[4] */
|
2337 |
target_ulong sc_lo2; |
2338 |
target_ulong sc_hi3; |
2339 |
target_ulong sc_lo3; |
2340 |
}; |
2341 |
|
2342 |
struct sigframe {
|
2343 |
uint32_t sf_ass[4]; /* argument save space for o32 */ |
2344 |
uint32_t sf_code[2]; /* signal trampoline */ |
2345 |
struct target_sigcontext sf_sc;
|
2346 |
target_sigset_t sf_mask; |
2347 |
}; |
2348 |
|
2349 |
struct target_ucontext {
|
2350 |
target_ulong uc_flags; |
2351 |
target_ulong uc_link; |
2352 |
target_stack_t uc_stack; |
2353 |
target_ulong pad0; |
2354 |
struct target_sigcontext uc_mcontext;
|
2355 |
target_sigset_t uc_sigmask; |
2356 |
}; |
2357 |
|
2358 |
struct target_rt_sigframe {
|
2359 |
uint32_t rs_ass[4]; /* argument save space for o32 */ |
2360 |
uint32_t rs_code[2]; /* signal trampoline */ |
2361 |
struct target_siginfo rs_info;
|
2362 |
struct target_ucontext rs_uc;
|
2363 |
}; |
2364 |
|
2365 |
/* Install trampoline to jump back from signal handler */
|
2366 |
static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall) |
2367 |
{ |
2368 |
int err;
|
2369 |
|
2370 |
/*
|
2371 |
* Set up the return code ...
|
2372 |
*
|
2373 |
* li v0, __NR__foo_sigreturn
|
2374 |
* syscall
|
2375 |
*/
|
2376 |
|
2377 |
err = __put_user(0x24020000 + syscall, tramp + 0); |
2378 |
err |= __put_user(0x0000000c , tramp + 1); |
2379 |
/* flush_cache_sigtramp((unsigned long) tramp); */
|
2380 |
return err;
|
2381 |
} |
2382 |
|
2383 |
static inline int |
2384 |
setup_sigcontext(CPUState *regs, struct target_sigcontext *sc)
|
2385 |
{ |
2386 |
int err = 0; |
2387 |
|
2388 |
err |= __put_user(regs->active_tc.PC, &sc->sc_pc); |
2389 |
|
2390 |
#define save_gp_reg(i) do { \ |
2391 |
err |= __put_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \ |
2392 |
} while(0) |
2393 |
__put_user(0, &sc->sc_regs[0]); save_gp_reg(1); save_gp_reg(2); |
2394 |
save_gp_reg(3); save_gp_reg(4); save_gp_reg(5); save_gp_reg(6); |
2395 |
save_gp_reg(7); save_gp_reg(8); save_gp_reg(9); save_gp_reg(10); |
2396 |
save_gp_reg(11); save_gp_reg(12); save_gp_reg(13); save_gp_reg(14); |
2397 |
save_gp_reg(15); save_gp_reg(16); save_gp_reg(17); save_gp_reg(18); |
2398 |
save_gp_reg(19); save_gp_reg(20); save_gp_reg(21); save_gp_reg(22); |
2399 |
save_gp_reg(23); save_gp_reg(24); save_gp_reg(25); save_gp_reg(26); |
2400 |
save_gp_reg(27); save_gp_reg(28); save_gp_reg(29); save_gp_reg(30); |
2401 |
save_gp_reg(31);
|
2402 |
#undef save_gp_reg
|
2403 |
|
2404 |
err |= __put_user(regs->active_tc.HI[0], &sc->sc_mdhi);
|
2405 |
err |= __put_user(regs->active_tc.LO[0], &sc->sc_mdlo);
|
2406 |
|
2407 |
/* Not used yet, but might be useful if we ever have DSP suppport */
|
2408 |
#if 0
|
2409 |
if (cpu_has_dsp) {
|
2410 |
err |= __put_user(mfhi1(), &sc->sc_hi1);
|
2411 |
err |= __put_user(mflo1(), &sc->sc_lo1);
|
2412 |
err |= __put_user(mfhi2(), &sc->sc_hi2);
|
2413 |
err |= __put_user(mflo2(), &sc->sc_lo2);
|
2414 |
err |= __put_user(mfhi3(), &sc->sc_hi3);
|
2415 |
err |= __put_user(mflo3(), &sc->sc_lo3);
|
2416 |
err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
|
2417 |
}
|
2418 |
/* same with 64 bit */
|
2419 |
#ifdef CONFIG_64BIT
|
2420 |
err |= __put_user(regs->hi, &sc->sc_hi[0]);
|
2421 |
err |= __put_user(regs->lo, &sc->sc_lo[0]);
|
2422 |
if (cpu_has_dsp) {
|
2423 |
err |= __put_user(mfhi1(), &sc->sc_hi[1]);
|
2424 |
err |= __put_user(mflo1(), &sc->sc_lo[1]);
|
2425 |
err |= __put_user(mfhi2(), &sc->sc_hi[2]);
|
2426 |
err |= __put_user(mflo2(), &sc->sc_lo[2]);
|
2427 |
err |= __put_user(mfhi3(), &sc->sc_hi[3]);
|
2428 |
err |= __put_user(mflo3(), &sc->sc_lo[3]);
|
2429 |
err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
|
2430 |
}
|
2431 |
#endif
|
2432 |
#endif
|
2433 |
|
2434 |
#if 0
|
2435 |
err |= __put_user(!!used_math(), &sc->sc_used_math);
|
2436 |
|
2437 |
if (!used_math())
|
2438 |
goto out;
|
2439 |
|
2440 |
/*
|
2441 |
* Save FPU state to signal context. Signal handler will "inherit"
|
2442 |
* current FPU state.
|
2443 |
*/
|
2444 |
preempt_disable();
|
2445 |
|
2446 |
if (!is_fpu_owner()) {
|
2447 |
own_fpu();
|
2448 |
restore_fp(current);
|
2449 |
}
|
2450 |
err |= save_fp_context(sc);
|
2451 |
|
2452 |
preempt_enable();
|
2453 |
out:
|
2454 |
#endif
|
2455 |
return err;
|
2456 |
} |
2457 |
|
2458 |
static inline int |
2459 |
restore_sigcontext(CPUState *regs, struct target_sigcontext *sc)
|
2460 |
{ |
2461 |
int err = 0; |
2462 |
|
2463 |
err |= __get_user(regs->CP0_EPC, &sc->sc_pc); |
2464 |
|
2465 |
err |= __get_user(regs->active_tc.HI[0], &sc->sc_mdhi);
|
2466 |
err |= __get_user(regs->active_tc.LO[0], &sc->sc_mdlo);
|
2467 |
|
2468 |
#define restore_gp_reg(i) do { \ |
2469 |
err |= __get_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \ |
2470 |
} while(0) |
2471 |
restore_gp_reg( 1); restore_gp_reg( 2); restore_gp_reg( 3); |
2472 |
restore_gp_reg( 4); restore_gp_reg( 5); restore_gp_reg( 6); |
2473 |
restore_gp_reg( 7); restore_gp_reg( 8); restore_gp_reg( 9); |
2474 |
restore_gp_reg(10); restore_gp_reg(11); restore_gp_reg(12); |
2475 |
restore_gp_reg(13); restore_gp_reg(14); restore_gp_reg(15); |
2476 |
restore_gp_reg(16); restore_gp_reg(17); restore_gp_reg(18); |
2477 |
restore_gp_reg(19); restore_gp_reg(20); restore_gp_reg(21); |
2478 |
restore_gp_reg(22); restore_gp_reg(23); restore_gp_reg(24); |
2479 |
restore_gp_reg(25); restore_gp_reg(26); restore_gp_reg(27); |
2480 |
restore_gp_reg(28); restore_gp_reg(29); restore_gp_reg(30); |
2481 |
restore_gp_reg(31);
|
2482 |
#undef restore_gp_reg
|
2483 |
|
2484 |
#if 0
|
2485 |
if (cpu_has_dsp) {
|
2486 |
err |= __get_user(treg, &sc->sc_hi1); mthi1(treg);
|
2487 |
err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg);
|
2488 |
err |= __get_user(treg, &sc->sc_hi2); mthi2(treg);
|
2489 |
err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg);
|
2490 |
err |= __get_user(treg, &sc->sc_hi3); mthi3(treg);
|
2491 |
err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg);
|
2492 |
err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
|
2493 |
}
|
2494 |
#ifdef CONFIG_64BIT
|
2495 |
err |= __get_user(regs->hi, &sc->sc_hi[0]);
|
2496 |
err |= __get_user(regs->lo, &sc->sc_lo[0]);
|
2497 |
if (cpu_has_dsp) {
|
2498 |
err |= __get_user(treg, &sc->sc_hi[1]); mthi1(treg);
|
2499 |
err |= __get_user(treg, &sc->sc_lo[1]); mthi1(treg);
|
2500 |
err |= __get_user(treg, &sc->sc_hi[2]); mthi2(treg);
|
2501 |
err |= __get_user(treg, &sc->sc_lo[2]); mthi2(treg);
|
2502 |
err |= __get_user(treg, &sc->sc_hi[3]); mthi3(treg);
|
2503 |
err |= __get_user(treg, &sc->sc_lo[3]); mthi3(treg);
|
2504 |
err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
|
2505 |
}
|
2506 |
#endif
|
2507 |
|
2508 |
err |= __get_user(used_math, &sc->sc_used_math); |
2509 |
conditional_used_math(used_math); |
2510 |
|
2511 |
preempt_disable(); |
2512 |
|
2513 |
if (used_math()) {
|
2514 |
/* restore fpu context if we have used it before */
|
2515 |
own_fpu(); |
2516 |
err |= restore_fp_context(sc); |
2517 |
} else {
|
2518 |
/* signal handler may have used FPU. Give it up. */
|
2519 |
lose_fpu(); |
2520 |
} |
2521 |
|
2522 |
preempt_enable(); |
2523 |
#endif
|
2524 |
return err;
|
2525 |
} |
2526 |
/*
|
2527 |
* Determine which stack to use..
|
2528 |
*/
|
2529 |
static inline abi_ulong |
2530 |
get_sigframe(struct target_sigaction *ka, CPUState *regs, size_t frame_size)
|
2531 |
{ |
2532 |
unsigned long sp; |
2533 |
|
2534 |
/* Default to using normal stack */
|
2535 |
sp = regs->active_tc.gpr[29];
|
2536 |
|
2537 |
/*
|
2538 |
* FPU emulator may have it's own trampoline active just
|
2539 |
* above the user stack, 16-bytes before the next lowest
|
2540 |
* 16 byte boundary. Try to avoid trashing it.
|
2541 |
*/
|
2542 |
sp -= 32;
|
2543 |
|
2544 |
/* This is the X/Open sanctioned signal stack switching. */
|
2545 |
if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) { |
2546 |
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
2547 |
} |
2548 |
|
2549 |
return (sp - frame_size) & ~7; |
2550 |
} |
2551 |
|
2552 |
/* compare linux/arch/mips/kernel/signal.c:setup_frame() */
|
2553 |
static void setup_frame(int sig, struct target_sigaction * ka, |
2554 |
target_sigset_t *set, CPUState *regs) |
2555 |
{ |
2556 |
struct sigframe *frame;
|
2557 |
abi_ulong frame_addr; |
2558 |
int i;
|
2559 |
|
2560 |
frame_addr = get_sigframe(ka, regs, sizeof(*frame));
|
2561 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
2562 |
goto give_sigsegv;
|
2563 |
|
2564 |
install_sigtramp(frame->sf_code, TARGET_NR_sigreturn); |
2565 |
|
2566 |
if(setup_sigcontext(regs, &frame->sf_sc))
|
2567 |
goto give_sigsegv;
|
2568 |
|
2569 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
2570 |
if(__put_user(set->sig[i], &frame->sf_mask.sig[i]))
|
2571 |
goto give_sigsegv;
|
2572 |
} |
2573 |
|
2574 |
/*
|
2575 |
* Arguments to signal handler:
|
2576 |
*
|
2577 |
* a0 = signal number
|
2578 |
* a1 = 0 (should be cause)
|
2579 |
* a2 = pointer to struct sigcontext
|
2580 |
*
|
2581 |
* $25 and PC point to the signal handler, $29 points to the
|
2582 |
* struct sigframe.
|
2583 |
*/
|
2584 |
regs->active_tc.gpr[ 4] = sig;
|
2585 |
regs->active_tc.gpr[ 5] = 0; |
2586 |
regs->active_tc.gpr[ 6] = frame_addr + offsetof(struct sigframe, sf_sc); |
2587 |
regs->active_tc.gpr[29] = frame_addr;
|
2588 |
regs->active_tc.gpr[31] = frame_addr + offsetof(struct sigframe, sf_code); |
2589 |
/* The original kernel code sets CP0_EPC to the handler
|
2590 |
* since it returns to userland using eret
|
2591 |
* we cannot do this here, and we must set PC directly */
|
2592 |
regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler;
|
2593 |
unlock_user_struct(frame, frame_addr, 1);
|
2594 |
return;
|
2595 |
|
2596 |
give_sigsegv:
|
2597 |
unlock_user_struct(frame, frame_addr, 1);
|
2598 |
force_sig(TARGET_SIGSEGV/*, current*/);
|
2599 |
return;
|
2600 |
} |
2601 |
|
2602 |
long do_sigreturn(CPUState *regs)
|
2603 |
{ |
2604 |
struct sigframe *frame;
|
2605 |
abi_ulong frame_addr; |
2606 |
sigset_t blocked; |
2607 |
target_sigset_t target_set; |
2608 |
int i;
|
2609 |
|
2610 |
#if defined(DEBUG_SIGNAL)
|
2611 |
fprintf(stderr, "do_sigreturn\n");
|
2612 |
#endif
|
2613 |
frame_addr = regs->active_tc.gpr[29];
|
2614 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
2615 |
goto badframe;
|
2616 |
|
2617 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
2618 |
if(__get_user(target_set.sig[i], &frame->sf_mask.sig[i]))
|
2619 |
goto badframe;
|
2620 |
} |
2621 |
|
2622 |
target_to_host_sigset_internal(&blocked, &target_set); |
2623 |
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
2624 |
|
2625 |
if (restore_sigcontext(regs, &frame->sf_sc))
|
2626 |
goto badframe;
|
2627 |
|
2628 |
#if 0
|
2629 |
/*
|
2630 |
* Don't let your children do this ...
|
2631 |
*/
|
2632 |
__asm__ __volatile__(
|
2633 |
"move\t$29, %0\n\t"
|
2634 |
"j\tsyscall_exit"
|
2635 |
:/* no outputs */
|
2636 |
:"r" (®s));
|
2637 |
/* Unreached */
|
2638 |
#endif
|
2639 |
|
2640 |
regs->active_tc.PC = regs->CP0_EPC; |
2641 |
/* I am not sure this is right, but it seems to work
|
2642 |
* maybe a problem with nested signals ? */
|
2643 |
regs->CP0_EPC = 0;
|
2644 |
return -TARGET_QEMU_ESIGRETURN;
|
2645 |
|
2646 |
badframe:
|
2647 |
force_sig(TARGET_SIGSEGV/*, current*/);
|
2648 |
return 0; |
2649 |
} |
2650 |
|
2651 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
2652 |
target_siginfo_t *info, |
2653 |
target_sigset_t *set, CPUState *env) |
2654 |
{ |
2655 |
struct target_rt_sigframe *frame;
|
2656 |
abi_ulong frame_addr; |
2657 |
int i;
|
2658 |
|
2659 |
frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
2660 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
2661 |
goto give_sigsegv;
|
2662 |
|
2663 |
install_sigtramp(frame->rs_code, TARGET_NR_rt_sigreturn); |
2664 |
|
2665 |
copy_siginfo_to_user(&frame->rs_info, info); |
2666 |
|
2667 |
__put_user(0, &frame->rs_uc.uc_flags);
|
2668 |
__put_user(0, &frame->rs_uc.uc_link);
|
2669 |
__put_user(target_sigaltstack_used.ss_sp, &frame->rs_uc.uc_stack.ss_sp); |
2670 |
__put_user(target_sigaltstack_used.ss_size, &frame->rs_uc.uc_stack.ss_size); |
2671 |
__put_user(sas_ss_flags(get_sp_from_cpustate(env)), |
2672 |
&frame->rs_uc.uc_stack.ss_flags); |
2673 |
|
2674 |
setup_sigcontext(env, &frame->rs_uc.uc_mcontext); |
2675 |
|
2676 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
2677 |
__put_user(set->sig[i], &frame->rs_uc.uc_sigmask.sig[i]); |
2678 |
} |
2679 |
|
2680 |
/*
|
2681 |
* Arguments to signal handler:
|
2682 |
*
|
2683 |
* a0 = signal number
|
2684 |
* a1 = pointer to struct siginfo
|
2685 |
* a2 = pointer to struct ucontext
|
2686 |
*
|
2687 |
* $25 and PC point to the signal handler, $29 points to the
|
2688 |
* struct sigframe.
|
2689 |
*/
|
2690 |
env->active_tc.gpr[ 4] = sig;
|
2691 |
env->active_tc.gpr[ 5] = frame_addr
|
2692 |
+ offsetof(struct target_rt_sigframe, rs_info);
|
2693 |
env->active_tc.gpr[ 6] = frame_addr
|
2694 |
+ offsetof(struct target_rt_sigframe, rs_uc);
|
2695 |
env->active_tc.gpr[29] = frame_addr;
|
2696 |
env->active_tc.gpr[31] = frame_addr
|
2697 |
+ offsetof(struct target_rt_sigframe, rs_code);
|
2698 |
/* The original kernel code sets CP0_EPC to the handler
|
2699 |
* since it returns to userland using eret
|
2700 |
* we cannot do this here, and we must set PC directly */
|
2701 |
env->active_tc.PC = env->active_tc.gpr[25] = ka->_sa_handler;
|
2702 |
unlock_user_struct(frame, frame_addr, 1);
|
2703 |
return;
|
2704 |
|
2705 |
give_sigsegv:
|
2706 |
unlock_user_struct(frame, frame_addr, 1);
|
2707 |
force_sig(TARGET_SIGSEGV/*, current*/);
|
2708 |
return;
|
2709 |
} |
2710 |
|
2711 |
long do_rt_sigreturn(CPUState *env)
|
2712 |
{ |
2713 |
struct target_rt_sigframe *frame;
|
2714 |
abi_ulong frame_addr; |
2715 |
sigset_t blocked; |
2716 |
|
2717 |
#if defined(DEBUG_SIGNAL)
|
2718 |
fprintf(stderr, "do_rt_sigreturn\n");
|
2719 |
#endif
|
2720 |
frame_addr = env->active_tc.gpr[29];
|
2721 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
2722 |
goto badframe;
|
2723 |
|
2724 |
target_to_host_sigset(&blocked, &frame->rs_uc.uc_sigmask); |
2725 |
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
2726 |
|
2727 |
if (restore_sigcontext(env, &frame->rs_uc.uc_mcontext))
|
2728 |
goto badframe;
|
2729 |
|
2730 |
if (do_sigaltstack(frame_addr +
|
2731 |
offsetof(struct target_rt_sigframe, rs_uc.uc_stack),
|
2732 |
0, get_sp_from_cpustate(env)) == -EFAULT)
|
2733 |
goto badframe;
|
2734 |
|
2735 |
env->active_tc.PC = env->CP0_EPC; |
2736 |
/* I am not sure this is right, but it seems to work
|
2737 |
* maybe a problem with nested signals ? */
|
2738 |
env->CP0_EPC = 0;
|
2739 |
return -TARGET_QEMU_ESIGRETURN;
|
2740 |
|
2741 |
badframe:
|
2742 |
force_sig(TARGET_SIGSEGV/*, current*/);
|
2743 |
return 0; |
2744 |
} |
2745 |
|
2746 |
#elif defined(TARGET_SH4)
|
2747 |
|
2748 |
/*
|
2749 |
* code and data structures from linux kernel:
|
2750 |
* include/asm-sh/sigcontext.h
|
2751 |
* arch/sh/kernel/signal.c
|
2752 |
*/
|
2753 |
|
2754 |
struct target_sigcontext {
|
2755 |
target_ulong oldmask; |
2756 |
|
2757 |
/* CPU registers */
|
2758 |
target_ulong sc_gregs[16];
|
2759 |
target_ulong sc_pc; |
2760 |
target_ulong sc_pr; |
2761 |
target_ulong sc_sr; |
2762 |
target_ulong sc_gbr; |
2763 |
target_ulong sc_mach; |
2764 |
target_ulong sc_macl; |
2765 |
|
2766 |
/* FPU registers */
|
2767 |
target_ulong sc_fpregs[16];
|
2768 |
target_ulong sc_xfpregs[16];
|
2769 |
unsigned int sc_fpscr; |
2770 |
unsigned int sc_fpul; |
2771 |
unsigned int sc_ownedfp; |
2772 |
}; |
2773 |
|
2774 |
struct target_sigframe
|
2775 |
{ |
2776 |
struct target_sigcontext sc;
|
2777 |
target_ulong extramask[TARGET_NSIG_WORDS-1];
|
2778 |
uint16_t retcode[3];
|
2779 |
}; |
2780 |
|
2781 |
|
2782 |
struct target_ucontext {
|
2783 |
target_ulong uc_flags; |
2784 |
struct target_ucontext *uc_link;
|
2785 |
target_stack_t uc_stack; |
2786 |
struct target_sigcontext uc_mcontext;
|
2787 |
target_sigset_t uc_sigmask; /* mask last for extensibility */
|
2788 |
}; |
2789 |
|
2790 |
struct target_rt_sigframe
|
2791 |
{ |
2792 |
struct target_siginfo info;
|
2793 |
struct target_ucontext uc;
|
2794 |
uint16_t retcode[3];
|
2795 |
}; |
2796 |
|
2797 |
|
2798 |
#define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */ |
2799 |
#define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */ |
2800 |
|
2801 |
static abi_ulong get_sigframe(struct target_sigaction *ka, |
2802 |
unsigned long sp, size_t frame_size) |
2803 |
{ |
2804 |
if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) { |
2805 |
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
2806 |
} |
2807 |
|
2808 |
return (sp - frame_size) & -8ul; |
2809 |
} |
2810 |
|
2811 |
static int setup_sigcontext(struct target_sigcontext *sc, |
2812 |
CPUState *regs, unsigned long mask) |
2813 |
{ |
2814 |
int err = 0; |
2815 |
|
2816 |
#define COPY(x) err |= __put_user(regs->x, &sc->sc_##x) |
2817 |
COPY(gregs[0]); COPY(gregs[1]); |
2818 |
COPY(gregs[2]); COPY(gregs[3]); |
2819 |
COPY(gregs[4]); COPY(gregs[5]); |
2820 |
COPY(gregs[6]); COPY(gregs[7]); |
2821 |
COPY(gregs[8]); COPY(gregs[9]); |
2822 |
COPY(gregs[10]); COPY(gregs[11]); |
2823 |
COPY(gregs[12]); COPY(gregs[13]); |
2824 |
COPY(gregs[14]); COPY(gregs[15]); |
2825 |
COPY(gbr); COPY(mach); |
2826 |
COPY(macl); COPY(pr); |
2827 |
COPY(sr); COPY(pc); |
2828 |
#undef COPY
|
2829 |
|
2830 |
/* todo: save FPU registers here */
|
2831 |
|
2832 |
/* non-iBCS2 extensions.. */
|
2833 |
err |= __put_user(mask, &sc->oldmask); |
2834 |
|
2835 |
return err;
|
2836 |
} |
2837 |
|
2838 |
static int restore_sigcontext(CPUState *regs, |
2839 |
struct target_sigcontext *sc)
|
2840 |
{ |
2841 |
unsigned int err = 0; |
2842 |
|
2843 |
#define COPY(x) err |= __get_user(regs->x, &sc->sc_##x) |
2844 |
COPY(gregs[1]);
|
2845 |
COPY(gregs[2]); COPY(gregs[3]); |
2846 |
COPY(gregs[4]); COPY(gregs[5]); |
2847 |
COPY(gregs[6]); COPY(gregs[7]); |
2848 |
COPY(gregs[8]); COPY(gregs[9]); |
2849 |
COPY(gregs[10]); COPY(gregs[11]); |
2850 |
COPY(gregs[12]); COPY(gregs[13]); |
2851 |
COPY(gregs[14]); COPY(gregs[15]); |
2852 |
COPY(gbr); COPY(mach); |
2853 |
COPY(macl); COPY(pr); |
2854 |
COPY(sr); COPY(pc); |
2855 |
#undef COPY
|
2856 |
|
2857 |
/* todo: restore FPU registers here */
|
2858 |
|
2859 |
regs->tra = -1; /* disable syscall checks */ |
2860 |
return err;
|
2861 |
} |
2862 |
|
2863 |
static void setup_frame(int sig, struct target_sigaction *ka, |
2864 |
target_sigset_t *set, CPUState *regs) |
2865 |
{ |
2866 |
struct target_sigframe *frame;
|
2867 |
abi_ulong frame_addr; |
2868 |
int i;
|
2869 |
int err = 0; |
2870 |
int signal;
|
2871 |
|
2872 |
frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame)); |
2873 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
2874 |
goto give_sigsegv;
|
2875 |
|
2876 |
signal = current_exec_domain_sig(sig); |
2877 |
|
2878 |
err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);
|
2879 |
|
2880 |
for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) { |
2881 |
err |= __put_user(set->sig[i + 1], &frame->extramask[i]);
|
2882 |
} |
2883 |
|
2884 |
/* Set up to return from userspace. If provided, use a stub
|
2885 |
already in userspace. */
|
2886 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
2887 |
regs->pr = (unsigned long) ka->sa_restorer; |
2888 |
} else {
|
2889 |
/* Generate return code (system call to sigreturn) */
|
2890 |
err |= __put_user(MOVW(2), &frame->retcode[0]); |
2891 |
err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
|
2892 |
err |= __put_user((TARGET_NR_sigreturn), &frame->retcode[2]);
|
2893 |
regs->pr = (unsigned long) frame->retcode; |
2894 |
} |
2895 |
|
2896 |
if (err)
|
2897 |
goto give_sigsegv;
|
2898 |
|
2899 |
/* Set up registers for signal handler */
|
2900 |
regs->gregs[15] = (unsigned long) frame; |
2901 |
regs->gregs[4] = signal; /* Arg for signal handler */ |
2902 |
regs->gregs[5] = 0; |
2903 |
regs->gregs[6] = (unsigned long) &frame->sc; |
2904 |
regs->pc = (unsigned long) ka->_sa_handler; |
2905 |
|
2906 |
unlock_user_struct(frame, frame_addr, 1);
|
2907 |
return;
|
2908 |
|
2909 |
give_sigsegv:
|
2910 |
unlock_user_struct(frame, frame_addr, 1);
|
2911 |
force_sig(SIGSEGV); |
2912 |
} |
2913 |
|
2914 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
2915 |
target_siginfo_t *info, |
2916 |
target_sigset_t *set, CPUState *regs) |
2917 |
{ |
2918 |
struct target_rt_sigframe *frame;
|
2919 |
abi_ulong frame_addr; |
2920 |
int i;
|
2921 |
int err = 0; |
2922 |
int signal;
|
2923 |
|
2924 |
frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame)); |
2925 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
2926 |
goto give_sigsegv;
|
2927 |
|
2928 |
signal = current_exec_domain_sig(sig); |
2929 |
|
2930 |
err |= copy_siginfo_to_user(&frame->info, info); |
2931 |
|
2932 |
/* Create the ucontext. */
|
2933 |
err |= __put_user(0, &frame->uc.uc_flags);
|
2934 |
err |= __put_user(0, (unsigned long *)&frame->uc.uc_link); |
2935 |
err |= __put_user((unsigned long)target_sigaltstack_used.ss_sp, |
2936 |
&frame->uc.uc_stack.ss_sp); |
2937 |
err |= __put_user(sas_ss_flags(regs->gregs[15]),
|
2938 |
&frame->uc.uc_stack.ss_flags); |
2939 |
err |= __put_user(target_sigaltstack_used.ss_size, |
2940 |
&frame->uc.uc_stack.ss_size); |
2941 |
err |= setup_sigcontext(&frame->uc.uc_mcontext, |
2942 |
regs, set->sig[0]);
|
2943 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
2944 |
err |= __put_user(set->sig[i], &frame->uc.uc_sigmask.sig[i]); |
2945 |
} |
2946 |
|
2947 |
/* Set up to return from userspace. If provided, use a stub
|
2948 |
already in userspace. */
|
2949 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
2950 |
regs->pr = (unsigned long) ka->sa_restorer; |
2951 |
} else {
|
2952 |
/* Generate return code (system call to sigreturn) */
|
2953 |
err |= __put_user(MOVW(2), &frame->retcode[0]); |
2954 |
err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
|
2955 |
err |= __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]);
|
2956 |
regs->pr = (unsigned long) frame->retcode; |
2957 |
} |
2958 |
|
2959 |
if (err)
|
2960 |
goto give_sigsegv;
|
2961 |
|
2962 |
/* Set up registers for signal handler */
|
2963 |
regs->gregs[15] = (unsigned long) frame; |
2964 |
regs->gregs[4] = signal; /* Arg for signal handler */ |
2965 |
regs->gregs[5] = (unsigned long) &frame->info; |
2966 |
regs->gregs[6] = (unsigned long) &frame->uc; |
2967 |
regs->pc = (unsigned long) ka->_sa_handler; |
2968 |
|
2969 |
unlock_user_struct(frame, frame_addr, 1);
|
2970 |
return;
|
2971 |
|
2972 |
give_sigsegv:
|
2973 |
unlock_user_struct(frame, frame_addr, 1);
|
2974 |
force_sig(SIGSEGV); |
2975 |
} |
2976 |
|
2977 |
long do_sigreturn(CPUState *regs)
|
2978 |
{ |
2979 |
struct target_sigframe *frame;
|
2980 |
abi_ulong frame_addr; |
2981 |
sigset_t blocked; |
2982 |
target_sigset_t target_set; |
2983 |
int i;
|
2984 |
int err = 0; |
2985 |
|
2986 |
#if defined(DEBUG_SIGNAL)
|
2987 |
fprintf(stderr, "do_sigreturn\n");
|
2988 |
#endif
|
2989 |
frame_addr = regs->gregs[15];
|
2990 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
2991 |
goto badframe;
|
2992 |
|
2993 |
err |= __get_user(target_set.sig[0], &frame->sc.oldmask);
|
2994 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
2995 |
err |= (__get_user(target_set.sig[i], &frame->extramask[i - 1]));
|
2996 |
} |
2997 |
|
2998 |
if (err)
|
2999 |
goto badframe;
|
3000 |
|
3001 |
target_to_host_sigset_internal(&blocked, &target_set); |
3002 |
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
3003 |
|
3004 |
if (restore_sigcontext(regs, &frame->sc))
|
3005 |
goto badframe;
|
3006 |
|
3007 |
unlock_user_struct(frame, frame_addr, 0);
|
3008 |
return regs->gregs[0]; |
3009 |
|
3010 |
badframe:
|
3011 |
unlock_user_struct(frame, frame_addr, 0);
|
3012 |
force_sig(TARGET_SIGSEGV); |
3013 |
return 0; |
3014 |
} |
3015 |
|
3016 |
long do_rt_sigreturn(CPUState *regs)
|
3017 |
{ |
3018 |
struct target_rt_sigframe *frame;
|
3019 |
abi_ulong frame_addr; |
3020 |
sigset_t blocked; |
3021 |
|
3022 |
#if defined(DEBUG_SIGNAL)
|
3023 |
fprintf(stderr, "do_rt_sigreturn\n");
|
3024 |
#endif
|
3025 |
frame_addr = regs->gregs[15];
|
3026 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
3027 |
goto badframe;
|
3028 |
|
3029 |
target_to_host_sigset(&blocked, &frame->uc.uc_sigmask); |
3030 |
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
3031 |
|
3032 |
if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
|
3033 |
goto badframe;
|
3034 |
|
3035 |
if (do_sigaltstack(frame_addr +
|
3036 |
offsetof(struct target_rt_sigframe, uc.uc_stack),
|
3037 |
0, get_sp_from_cpustate(regs)) == -EFAULT)
|
3038 |
goto badframe;
|
3039 |
|
3040 |
unlock_user_struct(frame, frame_addr, 0);
|
3041 |
return regs->gregs[0]; |
3042 |
|
3043 |
badframe:
|
3044 |
unlock_user_struct(frame, frame_addr, 0);
|
3045 |
force_sig(TARGET_SIGSEGV); |
3046 |
return 0; |
3047 |
} |
3048 |
#elif defined(TARGET_MICROBLAZE)
|
3049 |
|
3050 |
struct target_sigcontext {
|
3051 |
struct target_pt_regs regs; /* needs to be first */ |
3052 |
uint32_t oldmask; |
3053 |
}; |
3054 |
|
3055 |
/* Signal frames. */
|
3056 |
struct target_signal_frame {
|
3057 |
struct target_sigcontext sc;
|
3058 |
uint32_t extramask[TARGET_NSIG_WORDS - 1];
|
3059 |
uint32_t tramp[2];
|
3060 |
}; |
3061 |
|
3062 |
struct rt_signal_frame {
|
3063 |
struct siginfo info;
|
3064 |
struct ucontext uc;
|
3065 |
uint32_t tramp[2];
|
3066 |
}; |
3067 |
|
3068 |
static void setup_sigcontext(struct target_sigcontext *sc, CPUState *env) |
3069 |
{ |
3070 |
__put_user(env->regs[0], &sc->regs.r0);
|
3071 |
__put_user(env->regs[1], &sc->regs.r1);
|
3072 |
__put_user(env->regs[2], &sc->regs.r2);
|
3073 |
__put_user(env->regs[3], &sc->regs.r3);
|
3074 |
__put_user(env->regs[4], &sc->regs.r4);
|
3075 |
__put_user(env->regs[5], &sc->regs.r5);
|
3076 |
__put_user(env->regs[6], &sc->regs.r6);
|
3077 |
__put_user(env->regs[7], &sc->regs.r7);
|
3078 |
__put_user(env->regs[8], &sc->regs.r8);
|
3079 |
__put_user(env->regs[9], &sc->regs.r9);
|
3080 |
__put_user(env->regs[10], &sc->regs.r10);
|
3081 |
__put_user(env->regs[11], &sc->regs.r11);
|
3082 |
__put_user(env->regs[12], &sc->regs.r12);
|
3083 |
__put_user(env->regs[13], &sc->regs.r13);
|
3084 |
__put_user(env->regs[14], &sc->regs.r14);
|
3085 |
__put_user(env->regs[15], &sc->regs.r15);
|
3086 |
__put_user(env->regs[16], &sc->regs.r16);
|
3087 |
__put_user(env->regs[17], &sc->regs.r17);
|
3088 |
__put_user(env->regs[18], &sc->regs.r18);
|
3089 |
__put_user(env->regs[19], &sc->regs.r19);
|
3090 |
__put_user(env->regs[20], &sc->regs.r20);
|
3091 |
__put_user(env->regs[21], &sc->regs.r21);
|
3092 |
__put_user(env->regs[22], &sc->regs.r22);
|
3093 |
__put_user(env->regs[23], &sc->regs.r23);
|
3094 |
__put_user(env->regs[24], &sc->regs.r24);
|
3095 |
__put_user(env->regs[25], &sc->regs.r25);
|
3096 |
__put_user(env->regs[26], &sc->regs.r26);
|
3097 |
__put_user(env->regs[27], &sc->regs.r27);
|
3098 |
__put_user(env->regs[28], &sc->regs.r28);
|
3099 |
__put_user(env->regs[29], &sc->regs.r29);
|
3100 |
__put_user(env->regs[30], &sc->regs.r30);
|
3101 |
__put_user(env->regs[31], &sc->regs.r31);
|
3102 |
__put_user(env->sregs[SR_PC], &sc->regs.pc); |
3103 |
} |
3104 |
|
3105 |
static void restore_sigcontext(struct target_sigcontext *sc, CPUState *env) |
3106 |
{ |
3107 |
__get_user(env->regs[0], &sc->regs.r0);
|
3108 |
__get_user(env->regs[1], &sc->regs.r1);
|
3109 |
__get_user(env->regs[2], &sc->regs.r2);
|
3110 |
__get_user(env->regs[3], &sc->regs.r3);
|
3111 |
__get_user(env->regs[4], &sc->regs.r4);
|
3112 |
__get_user(env->regs[5], &sc->regs.r5);
|
3113 |
__get_user(env->regs[6], &sc->regs.r6);
|
3114 |
__get_user(env->regs[7], &sc->regs.r7);
|
3115 |
__get_user(env->regs[8], &sc->regs.r8);
|
3116 |
__get_user(env->regs[9], &sc->regs.r9);
|
3117 |
__get_user(env->regs[10], &sc->regs.r10);
|
3118 |
__get_user(env->regs[11], &sc->regs.r11);
|
3119 |
__get_user(env->regs[12], &sc->regs.r12);
|
3120 |
__get_user(env->regs[13], &sc->regs.r13);
|
3121 |
__get_user(env->regs[14], &sc->regs.r14);
|
3122 |
__get_user(env->regs[15], &sc->regs.r15);
|
3123 |
__get_user(env->regs[16], &sc->regs.r16);
|
3124 |
__get_user(env->regs[17], &sc->regs.r17);
|
3125 |
__get_user(env->regs[18], &sc->regs.r18);
|
3126 |
__get_user(env->regs[19], &sc->regs.r19);
|
3127 |
__get_user(env->regs[20], &sc->regs.r20);
|
3128 |
__get_user(env->regs[21], &sc->regs.r21);
|
3129 |
__get_user(env->regs[22], &sc->regs.r22);
|
3130 |
__get_user(env->regs[23], &sc->regs.r23);
|
3131 |
__get_user(env->regs[24], &sc->regs.r24);
|
3132 |
__get_user(env->regs[25], &sc->regs.r25);
|
3133 |
__get_user(env->regs[26], &sc->regs.r26);
|
3134 |
__get_user(env->regs[27], &sc->regs.r27);
|
3135 |
__get_user(env->regs[28], &sc->regs.r28);
|
3136 |
__get_user(env->regs[29], &sc->regs.r29);
|
3137 |
__get_user(env->regs[30], &sc->regs.r30);
|
3138 |
__get_user(env->regs[31], &sc->regs.r31);
|
3139 |
__get_user(env->sregs[SR_PC], &sc->regs.pc); |
3140 |
} |
3141 |
|
3142 |
static abi_ulong get_sigframe(struct target_sigaction *ka, |
3143 |
CPUState *env, int frame_size)
|
3144 |
{ |
3145 |
abi_ulong sp = env->regs[1];
|
3146 |
|
3147 |
if ((ka->sa_flags & SA_ONSTACK) != 0 && !on_sig_stack(sp)) |
3148 |
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
3149 |
|
3150 |
return ((sp - frame_size) & -8UL); |
3151 |
} |
3152 |
|
3153 |
static void setup_frame(int sig, struct target_sigaction *ka, |
3154 |
target_sigset_t *set, CPUState *env) |
3155 |
{ |
3156 |
struct target_signal_frame *frame;
|
3157 |
abi_ulong frame_addr; |
3158 |
int err = 0; |
3159 |
int i;
|
3160 |
|
3161 |
frame_addr = get_sigframe(ka, env, sizeof *frame);
|
3162 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
3163 |
goto badframe;
|
3164 |
|
3165 |
/* Save the mask. */
|
3166 |
err |= __put_user(set->sig[0], &frame->sc.oldmask);
|
3167 |
if (err)
|
3168 |
goto badframe;
|
3169 |
|
3170 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
3171 |
if (__put_user(set->sig[i], &frame->extramask[i - 1])) |
3172 |
goto badframe;
|
3173 |
} |
3174 |
|
3175 |
setup_sigcontext(&frame->sc, env); |
3176 |
|
3177 |
/* Set up to return from userspace. If provided, use a stub
|
3178 |
already in userspace. */
|
3179 |
/* minus 8 is offset to cater for "rtsd r15,8" offset */
|
3180 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
3181 |
env->regs[15] = ((unsigned long)ka->sa_restorer)-8; |
3182 |
} else {
|
3183 |
uint32_t t; |
3184 |
/* Note, these encodings are _big endian_! */
|
3185 |
/* addi r12, r0, __NR_sigreturn */
|
3186 |
t = 0x31800000UL | TARGET_NR_sigreturn;
|
3187 |
err |= __put_user(t, frame->tramp + 0);
|
3188 |
/* brki r14, 0x8 */
|
3189 |
t = 0xb9cc0008UL;
|
3190 |
err |= __put_user(t, frame->tramp + 1);
|
3191 |
|
3192 |
/* Return from sighandler will jump to the tramp.
|
3193 |
Negative 8 offset because return is rtsd r15, 8 */
|
3194 |
env->regs[15] = ((unsigned long)frame->tramp) - 8; |
3195 |
} |
3196 |
|
3197 |
if (err)
|
3198 |
goto badframe;
|
3199 |
|
3200 |
/* Set up registers for signal handler */
|
3201 |
env->regs[1] = (unsigned long) frame; |
3202 |
/* Signal handler args: */
|
3203 |
env->regs[5] = sig; /* Arg 0: signum */ |
3204 |
env->regs[6] = (unsigned long) &frame->sc; /* arg 1: sigcontext */ |
3205 |
|
3206 |
/* Offset of 4 to handle microblaze rtid r14, 0 */
|
3207 |
env->sregs[SR_PC] = (unsigned long)ka->_sa_handler; |
3208 |
|
3209 |
unlock_user_struct(frame, frame_addr, 1);
|
3210 |
return;
|
3211 |
badframe:
|
3212 |
unlock_user_struct(frame, frame_addr, 1);
|
3213 |
force_sig(TARGET_SIGSEGV); |
3214 |
} |
3215 |
|
3216 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
3217 |
target_siginfo_t *info, |
3218 |
target_sigset_t *set, CPUState *env) |
3219 |
{ |
3220 |
fprintf(stderr, "Microblaze setup_rt_frame: not implemented\n");
|
3221 |
} |
3222 |
|
3223 |
long do_sigreturn(CPUState *env)
|
3224 |
{ |
3225 |
struct target_signal_frame *frame;
|
3226 |
abi_ulong frame_addr; |
3227 |
target_sigset_t target_set; |
3228 |
sigset_t set; |
3229 |
int i;
|
3230 |
|
3231 |
frame_addr = env->regs[R_SP]; |
3232 |
/* Make sure the guest isn't playing games. */
|
3233 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) |
3234 |
goto badframe;
|
3235 |
|
3236 |
/* Restore blocked signals */
|
3237 |
if (__get_user(target_set.sig[0], &frame->sc.oldmask)) |
3238 |
goto badframe;
|
3239 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
3240 |
if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) |
3241 |
goto badframe;
|
3242 |
} |
3243 |
target_to_host_sigset_internal(&set, &target_set); |
3244 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
3245 |
|
3246 |
restore_sigcontext(&frame->sc, env); |
3247 |
/* We got here through a sigreturn syscall, our path back is via an
|
3248 |
rtb insn so setup r14 for that. */
|
3249 |
env->regs[14] = env->sregs[SR_PC];
|
3250 |
|
3251 |
unlock_user_struct(frame, frame_addr, 0);
|
3252 |
return env->regs[10]; |
3253 |
badframe:
|
3254 |
unlock_user_struct(frame, frame_addr, 0);
|
3255 |
force_sig(TARGET_SIGSEGV); |
3256 |
} |
3257 |
|
3258 |
long do_rt_sigreturn(CPUState *env)
|
3259 |
{ |
3260 |
fprintf(stderr, "Microblaze do_rt_sigreturn: not implemented\n");
|
3261 |
return -TARGET_ENOSYS;
|
3262 |
} |
3263 |
|
3264 |
#elif defined(TARGET_CRIS)
|
3265 |
|
3266 |
struct target_sigcontext {
|
3267 |
struct target_pt_regs regs; /* needs to be first */ |
3268 |
uint32_t oldmask; |
3269 |
uint32_t usp; /* usp before stacking this gunk on it */
|
3270 |
}; |
3271 |
|
3272 |
/* Signal frames. */
|
3273 |
struct target_signal_frame {
|
3274 |
struct target_sigcontext sc;
|
3275 |
uint32_t extramask[TARGET_NSIG_WORDS - 1];
|
3276 |
uint8_t retcode[8]; /* Trampoline code. */ |
3277 |
}; |
3278 |
|
3279 |
struct rt_signal_frame {
|
3280 |
struct siginfo *pinfo;
|
3281 |
void *puc;
|
3282 |
struct siginfo info;
|
3283 |
struct ucontext uc;
|
3284 |
uint8_t retcode[8]; /* Trampoline code. */ |
3285 |
}; |
3286 |
|
3287 |
static void setup_sigcontext(struct target_sigcontext *sc, CPUState *env) |
3288 |
{ |
3289 |
__put_user(env->regs[0], &sc->regs.r0);
|
3290 |
__put_user(env->regs[1], &sc->regs.r1);
|
3291 |
__put_user(env->regs[2], &sc->regs.r2);
|
3292 |
__put_user(env->regs[3], &sc->regs.r3);
|
3293 |
__put_user(env->regs[4], &sc->regs.r4);
|
3294 |
__put_user(env->regs[5], &sc->regs.r5);
|
3295 |
__put_user(env->regs[6], &sc->regs.r6);
|
3296 |
__put_user(env->regs[7], &sc->regs.r7);
|
3297 |
__put_user(env->regs[8], &sc->regs.r8);
|
3298 |
__put_user(env->regs[9], &sc->regs.r9);
|
3299 |
__put_user(env->regs[10], &sc->regs.r10);
|
3300 |
__put_user(env->regs[11], &sc->regs.r11);
|
3301 |
__put_user(env->regs[12], &sc->regs.r12);
|
3302 |
__put_user(env->regs[13], &sc->regs.r13);
|
3303 |
__put_user(env->regs[14], &sc->usp);
|
3304 |
__put_user(env->regs[15], &sc->regs.acr);
|
3305 |
__put_user(env->pregs[PR_MOF], &sc->regs.mof); |
3306 |
__put_user(env->pregs[PR_SRP], &sc->regs.srp); |
3307 |
__put_user(env->pc, &sc->regs.erp); |
3308 |
} |
3309 |
|
3310 |
static void restore_sigcontext(struct target_sigcontext *sc, CPUState *env) |
3311 |
{ |
3312 |
__get_user(env->regs[0], &sc->regs.r0);
|
3313 |
__get_user(env->regs[1], &sc->regs.r1);
|
3314 |
__get_user(env->regs[2], &sc->regs.r2);
|
3315 |
__get_user(env->regs[3], &sc->regs.r3);
|
3316 |
__get_user(env->regs[4], &sc->regs.r4);
|
3317 |
__get_user(env->regs[5], &sc->regs.r5);
|
3318 |
__get_user(env->regs[6], &sc->regs.r6);
|
3319 |
__get_user(env->regs[7], &sc->regs.r7);
|
3320 |
__get_user(env->regs[8], &sc->regs.r8);
|
3321 |
__get_user(env->regs[9], &sc->regs.r9);
|
3322 |
__get_user(env->regs[10], &sc->regs.r10);
|
3323 |
__get_user(env->regs[11], &sc->regs.r11);
|
3324 |
__get_user(env->regs[12], &sc->regs.r12);
|
3325 |
__get_user(env->regs[13], &sc->regs.r13);
|
3326 |
__get_user(env->regs[14], &sc->usp);
|
3327 |
__get_user(env->regs[15], &sc->regs.acr);
|
3328 |
__get_user(env->pregs[PR_MOF], &sc->regs.mof); |
3329 |
__get_user(env->pregs[PR_SRP], &sc->regs.srp); |
3330 |
__get_user(env->pc, &sc->regs.erp); |
3331 |
} |
3332 |
|
3333 |
static abi_ulong get_sigframe(CPUState *env, int framesize) |
3334 |
{ |
3335 |
abi_ulong sp; |
3336 |
/* Align the stack downwards to 4. */
|
3337 |
sp = (env->regs[R_SP] & ~3);
|
3338 |
return sp - framesize;
|
3339 |
} |
3340 |
|
3341 |
static void setup_frame(int sig, struct target_sigaction *ka, |
3342 |
target_sigset_t *set, CPUState *env) |
3343 |
{ |
3344 |
struct target_signal_frame *frame;
|
3345 |
abi_ulong frame_addr; |
3346 |
int err = 0; |
3347 |
int i;
|
3348 |
|
3349 |
frame_addr = get_sigframe(env, sizeof *frame);
|
3350 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
3351 |
goto badframe;
|
3352 |
|
3353 |
/*
|
3354 |
* The CRIS signal return trampoline. A real linux/CRIS kernel doesn't
|
3355 |
* use this trampoline anymore but it sets it up for GDB.
|
3356 |
* In QEMU, using the trampoline simplifies things a bit so we use it.
|
3357 |
*
|
3358 |
* This is movu.w __NR_sigreturn, r9; break 13;
|
3359 |
*/
|
3360 |
err |= __put_user(0x9c5f, frame->retcode+0); |
3361 |
err |= __put_user(TARGET_NR_sigreturn, |
3362 |
frame->retcode+2);
|
3363 |
err |= __put_user(0xe93d, frame->retcode+4); |
3364 |
|
3365 |
/* Save the mask. */
|
3366 |
err |= __put_user(set->sig[0], &frame->sc.oldmask);
|
3367 |
if (err)
|
3368 |
goto badframe;
|
3369 |
|
3370 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
3371 |
if (__put_user(set->sig[i], &frame->extramask[i - 1])) |
3372 |
goto badframe;
|
3373 |
} |
3374 |
|
3375 |
setup_sigcontext(&frame->sc, env); |
3376 |
|
3377 |
/* Move the stack and setup the arguments for the handler. */
|
3378 |
env->regs[R_SP] = (uint32_t) (unsigned long) frame; |
3379 |
env->regs[10] = sig;
|
3380 |
env->pc = (unsigned long) ka->_sa_handler; |
3381 |
/* Link SRP so the guest returns through the trampoline. */
|
3382 |
env->pregs[PR_SRP] = (uint32_t) (unsigned long) &frame->retcode[0]; |
3383 |
|
3384 |
unlock_user_struct(frame, frame_addr, 1);
|
3385 |
return;
|
3386 |
badframe:
|
3387 |
unlock_user_struct(frame, frame_addr, 1);
|
3388 |
force_sig(TARGET_SIGSEGV); |
3389 |
} |
3390 |
|
3391 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
3392 |
target_siginfo_t *info, |
3393 |
target_sigset_t *set, CPUState *env) |
3394 |
{ |
3395 |
fprintf(stderr, "CRIS setup_rt_frame: not implemented\n");
|
3396 |
} |
3397 |
|
3398 |
long do_sigreturn(CPUState *env)
|
3399 |
{ |
3400 |
struct target_signal_frame *frame;
|
3401 |
abi_ulong frame_addr; |
3402 |
target_sigset_t target_set; |
3403 |
sigset_t set; |
3404 |
int i;
|
3405 |
|
3406 |
frame_addr = env->regs[R_SP]; |
3407 |
/* Make sure the guest isn't playing games. */
|
3408 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) |
3409 |
goto badframe;
|
3410 |
|
3411 |
/* Restore blocked signals */
|
3412 |
if (__get_user(target_set.sig[0], &frame->sc.oldmask)) |
3413 |
goto badframe;
|
3414 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
3415 |
if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) |
3416 |
goto badframe;
|
3417 |
} |
3418 |
target_to_host_sigset_internal(&set, &target_set); |
3419 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
3420 |
|
3421 |
restore_sigcontext(&frame->sc, env); |
3422 |
unlock_user_struct(frame, frame_addr, 0);
|
3423 |
return env->regs[10]; |
3424 |
badframe:
|
3425 |
unlock_user_struct(frame, frame_addr, 0);
|
3426 |
force_sig(TARGET_SIGSEGV); |
3427 |
} |
3428 |
|
3429 |
long do_rt_sigreturn(CPUState *env)
|
3430 |
{ |
3431 |
fprintf(stderr, "CRIS do_rt_sigreturn: not implemented\n");
|
3432 |
return -TARGET_ENOSYS;
|
3433 |
} |
3434 |
|
3435 |
#elif defined(TARGET_PPC) && !defined(TARGET_PPC64)
|
3436 |
|
3437 |
/* FIXME: Many of the structures are defined for both PPC and PPC64, but
|
3438 |
the signal handling is different enough that we haven't implemented
|
3439 |
support for PPC64 yet. Hence the restriction above.
|
3440 |
|
3441 |
There are various #if'd blocks for code for TARGET_PPC64. These
|
3442 |
blocks should go away so that we can successfully run 32-bit and
|
3443 |
64-bit binaries on a QEMU configured for PPC64. */
|
3444 |
|
3445 |
/* Size of dummy stack frame allocated when calling signal handler.
|
3446 |
See arch/powerpc/include/asm/ptrace.h. */
|
3447 |
#if defined(TARGET_PPC64)
|
3448 |
#define SIGNAL_FRAMESIZE 128 |
3449 |
#else
|
3450 |
#define SIGNAL_FRAMESIZE 64 |
3451 |
#endif
|
3452 |
|
3453 |
/* See arch/powerpc/include/asm/sigcontext.h. */
|
3454 |
struct target_sigcontext {
|
3455 |
target_ulong _unused[4];
|
3456 |
int32_t signal; |
3457 |
#if defined(TARGET_PPC64)
|
3458 |
int32_t pad0; |
3459 |
#endif
|
3460 |
target_ulong handler; |
3461 |
target_ulong oldmask; |
3462 |
target_ulong regs; /* struct pt_regs __user * */
|
3463 |
/* TODO: PPC64 includes extra bits here. */
|
3464 |
}; |
3465 |
|
3466 |
/* Indices for target_mcontext.mc_gregs, below.
|
3467 |
See arch/powerpc/include/asm/ptrace.h for details. */
|
3468 |
enum {
|
3469 |
TARGET_PT_R0 = 0,
|
3470 |
TARGET_PT_R1 = 1,
|
3471 |
TARGET_PT_R2 = 2,
|
3472 |
TARGET_PT_R3 = 3,
|
3473 |
TARGET_PT_R4 = 4,
|
3474 |
TARGET_PT_R5 = 5,
|
3475 |
TARGET_PT_R6 = 6,
|
3476 |
TARGET_PT_R7 = 7,
|
3477 |
TARGET_PT_R8 = 8,
|
3478 |
TARGET_PT_R9 = 9,
|
3479 |
TARGET_PT_R10 = 10,
|
3480 |
TARGET_PT_R11 = 11,
|
3481 |
TARGET_PT_R12 = 12,
|
3482 |
TARGET_PT_R13 = 13,
|
3483 |
TARGET_PT_R14 = 14,
|
3484 |
TARGET_PT_R15 = 15,
|
3485 |
TARGET_PT_R16 = 16,
|
3486 |
TARGET_PT_R17 = 17,
|
3487 |
TARGET_PT_R18 = 18,
|
3488 |
TARGET_PT_R19 = 19,
|
3489 |
TARGET_PT_R20 = 20,
|
3490 |
TARGET_PT_R21 = 21,
|
3491 |
TARGET_PT_R22 = 22,
|
3492 |
TARGET_PT_R23 = 23,
|
3493 |
TARGET_PT_R24 = 24,
|
3494 |
TARGET_PT_R25 = 25,
|
3495 |
TARGET_PT_R26 = 26,
|
3496 |
TARGET_PT_R27 = 27,
|
3497 |
TARGET_PT_R28 = 28,
|
3498 |
TARGET_PT_R29 = 29,
|
3499 |
TARGET_PT_R30 = 30,
|
3500 |
TARGET_PT_R31 = 31,
|
3501 |
TARGET_PT_NIP = 32,
|
3502 |
TARGET_PT_MSR = 33,
|
3503 |
TARGET_PT_ORIG_R3 = 34,
|
3504 |
TARGET_PT_CTR = 35,
|
3505 |
TARGET_PT_LNK = 36,
|
3506 |
TARGET_PT_XER = 37,
|
3507 |
TARGET_PT_CCR = 38,
|
3508 |
/* Yes, there are two registers with #39. One is 64-bit only. */
|
3509 |
TARGET_PT_MQ = 39,
|
3510 |
TARGET_PT_SOFTE = 39,
|
3511 |
TARGET_PT_TRAP = 40,
|
3512 |
TARGET_PT_DAR = 41,
|
3513 |
TARGET_PT_DSISR = 42,
|
3514 |
TARGET_PT_RESULT = 43,
|
3515 |
TARGET_PT_REGS_COUNT = 44
|
3516 |
}; |
3517 |
|
3518 |
/* See arch/powerpc/include/asm/ucontext.h. Only used for 32-bit PPC;
|
3519 |
on 64-bit PPC, sigcontext and mcontext are one and the same. */
|
3520 |
struct target_mcontext {
|
3521 |
target_ulong mc_gregs[48];
|
3522 |
/* Includes fpscr. */
|
3523 |
uint64_t mc_fregs[33];
|
3524 |
target_ulong mc_pad[2];
|
3525 |
/* We need to handle Altivec and SPE at the same time, which no
|
3526 |
kernel needs to do. Fortunately, the kernel defines this bit to
|
3527 |
be Altivec-register-large all the time, rather than trying to
|
3528 |
twiddle it based on the specific platform. */
|
3529 |
union {
|
3530 |
/* SPE vector registers. One extra for SPEFSCR. */
|
3531 |
uint32_t spe[33];
|
3532 |
/* Altivec vector registers. The packing of VSCR and VRSAVE
|
3533 |
varies depending on whether we're PPC64 or not: PPC64 splits
|
3534 |
them apart; PPC32 stuffs them together. */
|
3535 |
#if defined(TARGET_PPC64)
|
3536 |
#define QEMU_NVRREG 34 |
3537 |
#else
|
3538 |
#define QEMU_NVRREG 33 |
3539 |
#endif
|
3540 |
ppc_avr_t altivec[QEMU_NVRREG]; |
3541 |
#undef QEMU_NVRREG
|
3542 |
} mc_vregs __attribute__((__aligned__(16)));
|
3543 |
}; |
3544 |
|
3545 |
struct target_ucontext {
|
3546 |
target_ulong uc_flags; |
3547 |
target_ulong uc_link; /* struct ucontext __user * */
|
3548 |
struct target_sigaltstack uc_stack;
|
3549 |
#if !defined(TARGET_PPC64)
|
3550 |
int32_t uc_pad[7];
|
3551 |
target_ulong uc_regs; /* struct mcontext __user *
|
3552 |
points to uc_mcontext field */
|
3553 |
#endif
|
3554 |
target_sigset_t uc_sigmask; |
3555 |
#if defined(TARGET_PPC64)
|
3556 |
target_sigset_t unused[15]; /* Allow for uc_sigmask growth */ |
3557 |
struct target_sigcontext uc_mcontext;
|
3558 |
#else
|
3559 |
int32_t uc_maskext[30];
|
3560 |
int32_t uc_pad2[3];
|
3561 |
struct target_mcontext uc_mcontext;
|
3562 |
#endif
|
3563 |
}; |
3564 |
|
3565 |
/* See arch/powerpc/kernel/signal_32.c. */
|
3566 |
struct target_sigframe {
|
3567 |
struct target_sigcontext sctx;
|
3568 |
struct target_mcontext mctx;
|
3569 |
int32_t abigap[56];
|
3570 |
}; |
3571 |
|
3572 |
struct target_rt_sigframe {
|
3573 |
struct target_siginfo info;
|
3574 |
struct target_ucontext uc;
|
3575 |
int32_t abigap[56];
|
3576 |
}; |
3577 |
|
3578 |
/* We use the mc_pad field for the signal return trampoline. */
|
3579 |
#define tramp mc_pad
|
3580 |
|
3581 |
/* See arch/powerpc/kernel/signal.c. */
|
3582 |
static target_ulong get_sigframe(struct target_sigaction *ka, |
3583 |
CPUState *env, |
3584 |
int frame_size)
|
3585 |
{ |
3586 |
target_ulong oldsp, newsp; |
3587 |
|
3588 |
oldsp = env->gpr[1];
|
3589 |
|
3590 |
if ((ka->sa_flags & TARGET_SA_ONSTACK) &&
|
3591 |
(sas_ss_flags(oldsp))) { |
3592 |
oldsp = (target_sigaltstack_used.ss_sp |
3593 |
+ target_sigaltstack_used.ss_size); |
3594 |
} |
3595 |
|
3596 |
newsp = (oldsp - frame_size) & ~0xFUL;
|
3597 |
|
3598 |
return newsp;
|
3599 |
} |
3600 |
|
3601 |
static int save_user_regs(CPUState *env, struct target_mcontext *frame, |
3602 |
int sigret)
|
3603 |
{ |
3604 |
target_ulong msr = env->msr; |
3605 |
int i;
|
3606 |
target_ulong ccr = 0;
|
3607 |
|
3608 |
/* In general, the kernel attempts to be intelligent about what it
|
3609 |
needs to save for Altivec/FP/SPE registers. We don't care that
|
3610 |
much, so we just go ahead and save everything. */
|
3611 |
|
3612 |
/* Save general registers. */
|
3613 |
for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { |
3614 |
if (__put_user(env->gpr[i], &frame->mc_gregs[i])) {
|
3615 |
return 1; |
3616 |
} |
3617 |
} |
3618 |
if (__put_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP])
|
3619 |
|| __put_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR]) |
3620 |
|| __put_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK]) |
3621 |
|| __put_user(env->xer, &frame->mc_gregs[TARGET_PT_XER])) |
3622 |
return 1; |
3623 |
|
3624 |
for (i = 0; i < ARRAY_SIZE(env->crf); i++) { |
3625 |
ccr |= env->crf[i] << (32 - ((i + 1) * 4)); |
3626 |
} |
3627 |
if (__put_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]))
|
3628 |
return 1; |
3629 |
|
3630 |
/* Save Altivec registers if necessary. */
|
3631 |
if (env->insns_flags & PPC_ALTIVEC) {
|
3632 |
for (i = 0; i < ARRAY_SIZE(env->avr); i++) { |
3633 |
ppc_avr_t *avr = &env->avr[i]; |
3634 |
ppc_avr_t *vreg = &frame->mc_vregs.altivec[i]; |
3635 |
|
3636 |
if (__put_user(avr->u64[0], &vreg->u64[0]) || |
3637 |
__put_user(avr->u64[1], &vreg->u64[1])) { |
3638 |
return 1; |
3639 |
} |
3640 |
} |
3641 |
/* Set MSR_VR in the saved MSR value to indicate that
|
3642 |
frame->mc_vregs contains valid data. */
|
3643 |
msr |= MSR_VR; |
3644 |
if (__put_user((uint32_t)env->spr[SPR_VRSAVE],
|
3645 |
&frame->mc_vregs.altivec[32].u32[3])) |
3646 |
return 1; |
3647 |
} |
3648 |
|
3649 |
/* Save floating point registers. */
|
3650 |
if (env->insns_flags & PPC_FLOAT) {
|
3651 |
for (i = 0; i < ARRAY_SIZE(env->fpr); i++) { |
3652 |
if (__put_user(env->fpr[i], &frame->mc_fregs[i])) {
|
3653 |
return 1; |
3654 |
} |
3655 |
} |
3656 |
if (__put_user((uint64_t) env->fpscr, &frame->mc_fregs[32])) |
3657 |
return 1; |
3658 |
} |
3659 |
|
3660 |
/* Save SPE registers. The kernel only saves the high half. */
|
3661 |
if (env->insns_flags & PPC_SPE) {
|
3662 |
#if defined(TARGET_PPC64)
|
3663 |
for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { |
3664 |
if (__put_user(env->gpr[i] >> 32, &frame->mc_vregs.spe[i])) { |
3665 |
return 1; |
3666 |
} |
3667 |
} |
3668 |
#else
|
3669 |
for (i = 0; i < ARRAY_SIZE(env->gprh); i++) { |
3670 |
if (__put_user(env->gprh[i], &frame->mc_vregs.spe[i])) {
|
3671 |
return 1; |
3672 |
} |
3673 |
} |
3674 |
#endif
|
3675 |
/* Set MSR_SPE in the saved MSR value to indicate that
|
3676 |
frame->mc_vregs contains valid data. */
|
3677 |
msr |= MSR_SPE; |
3678 |
if (__put_user(env->spe_fscr, &frame->mc_vregs.spe[32])) |
3679 |
return 1; |
3680 |
} |
3681 |
|
3682 |
/* Store MSR. */
|
3683 |
if (__put_user(msr, &frame->mc_gregs[TARGET_PT_MSR]))
|
3684 |
return 1; |
3685 |
|
3686 |
/* Set up the sigreturn trampoline: li r0,sigret; sc. */
|
3687 |
if (sigret) {
|
3688 |
if (__put_user(0x38000000UL | sigret, &frame->tramp[0]) || |
3689 |
__put_user(0x44000002UL, &frame->tramp[1])) { |
3690 |
return 1; |
3691 |
} |
3692 |
} |
3693 |
|
3694 |
return 0; |
3695 |
} |
3696 |
|
3697 |
static int restore_user_regs(CPUState *env, |
3698 |
struct target_mcontext *frame, int sig) |
3699 |
{ |
3700 |
target_ulong save_r2 = 0;
|
3701 |
target_ulong msr; |
3702 |
target_ulong ccr; |
3703 |
|
3704 |
int i;
|
3705 |
|
3706 |
if (!sig) {
|
3707 |
save_r2 = env->gpr[2];
|
3708 |
} |
3709 |
|
3710 |
/* Restore general registers. */
|
3711 |
for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { |
3712 |
if (__get_user(env->gpr[i], &frame->mc_gregs[i])) {
|
3713 |
return 1; |
3714 |
} |
3715 |
} |
3716 |
if (__get_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP])
|
3717 |
|| __get_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR]) |
3718 |
|| __get_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK]) |
3719 |
|| __get_user(env->xer, &frame->mc_gregs[TARGET_PT_XER])) |
3720 |
return 1; |
3721 |
if (__get_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]))
|
3722 |
return 1; |
3723 |
|
3724 |
for (i = 0; i < ARRAY_SIZE(env->crf); i++) { |
3725 |
env->crf[i] = (ccr >> (32 - ((i + 1) * 4))) & 0xf; |
3726 |
} |
3727 |
|
3728 |
if (!sig) {
|
3729 |
env->gpr[2] = save_r2;
|
3730 |
} |
3731 |
/* Restore MSR. */
|
3732 |
if (__get_user(msr, &frame->mc_gregs[TARGET_PT_MSR]))
|
3733 |
return 1; |
3734 |
|
3735 |
/* If doing signal return, restore the previous little-endian mode. */
|
3736 |
if (sig)
|
3737 |
env->msr = (env->msr & ~MSR_LE) | (msr & MSR_LE); |
3738 |
|
3739 |
/* Restore Altivec registers if necessary. */
|
3740 |
if (env->insns_flags & PPC_ALTIVEC) {
|
3741 |
for (i = 0; i < ARRAY_SIZE(env->avr); i++) { |
3742 |
ppc_avr_t *avr = &env->avr[i]; |
3743 |
ppc_avr_t *vreg = &frame->mc_vregs.altivec[i]; |
3744 |
|
3745 |
if (__get_user(avr->u64[0], &vreg->u64[0]) || |
3746 |
__get_user(avr->u64[1], &vreg->u64[1])) { |
3747 |
return 1; |
3748 |
} |
3749 |
} |
3750 |
/* Set MSR_VEC in the saved MSR value to indicate that
|
3751 |
frame->mc_vregs contains valid data. */
|
3752 |
if (__get_user(env->spr[SPR_VRSAVE],
|
3753 |
(target_ulong *)(&frame->mc_vregs.altivec[32].u32[3]))) |
3754 |
return 1; |
3755 |
} |
3756 |
|
3757 |
/* Restore floating point registers. */
|
3758 |
if (env->insns_flags & PPC_FLOAT) {
|
3759 |
uint64_t fpscr; |
3760 |
for (i = 0; i < ARRAY_SIZE(env->fpr); i++) { |
3761 |
if (__get_user(env->fpr[i], &frame->mc_fregs[i])) {
|
3762 |
return 1; |
3763 |
} |
3764 |
} |
3765 |
if (__get_user(fpscr, &frame->mc_fregs[32])) |
3766 |
return 1; |
3767 |
env->fpscr = (uint32_t) fpscr; |
3768 |
} |
3769 |
|
3770 |
/* Save SPE registers. The kernel only saves the high half. */
|
3771 |
if (env->insns_flags & PPC_SPE) {
|
3772 |
#if defined(TARGET_PPC64)
|
3773 |
for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { |
3774 |
uint32_t hi; |
3775 |
|
3776 |
if (__get_user(hi, &frame->mc_vregs.spe[i])) {
|
3777 |
return 1; |
3778 |
} |
3779 |
env->gpr[i] = ((uint64_t)hi << 32) | ((uint32_t) env->gpr[i]);
|
3780 |
} |
3781 |
#else
|
3782 |
for (i = 0; i < ARRAY_SIZE(env->gprh); i++) { |
3783 |
if (__get_user(env->gprh[i], &frame->mc_vregs.spe[i])) {
|
3784 |
return 1; |
3785 |
} |
3786 |
} |
3787 |
#endif
|
3788 |
if (__get_user(env->spe_fscr, &frame->mc_vregs.spe[32])) |
3789 |
return 1; |
3790 |
} |
3791 |
|
3792 |
return 0; |
3793 |
} |
3794 |
|
3795 |
static void setup_frame(int sig, struct target_sigaction *ka, |
3796 |
target_sigset_t *set, CPUState *env) |
3797 |
{ |
3798 |
struct target_sigframe *frame;
|
3799 |
struct target_sigcontext *sc;
|
3800 |
target_ulong frame_addr, newsp; |
3801 |
int err = 0; |
3802 |
int signal;
|
3803 |
|
3804 |
frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
3805 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) |
3806 |
goto sigsegv;
|
3807 |
sc = &frame->sctx; |
3808 |
|
3809 |
signal = current_exec_domain_sig(sig); |
3810 |
|
3811 |
err |= __put_user(h2g(ka->_sa_handler), &sc->handler); |
3812 |
err |= __put_user(set->sig[0], &sc->oldmask);
|
3813 |
#if defined(TARGET_PPC64)
|
3814 |
err |= __put_user(set->sig[0] >> 32, &sc->_unused[3]); |
3815 |
#else
|
3816 |
err |= __put_user(set->sig[1], &sc->_unused[3]); |
3817 |
#endif
|
3818 |
err |= __put_user(h2g(&frame->mctx), &sc->regs); |
3819 |
err |= __put_user(sig, &sc->signal); |
3820 |
|
3821 |
/* Save user regs. */
|
3822 |
err |= save_user_regs(env, &frame->mctx, TARGET_NR_sigreturn); |
3823 |
|
3824 |
/* The kernel checks for the presence of a VDSO here. We don't
|
3825 |
emulate a vdso, so use a sigreturn system call. */
|
3826 |
env->lr = (target_ulong) h2g(frame->mctx.tramp); |
3827 |
|
3828 |
/* Turn off all fp exceptions. */
|
3829 |
env->fpscr = 0;
|
3830 |
|
3831 |
/* Create a stack frame for the caller of the handler. */
|
3832 |
newsp = frame_addr - SIGNAL_FRAMESIZE; |
3833 |
err |= __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp);
|
3834 |
|
3835 |
if (err)
|
3836 |
goto sigsegv;
|
3837 |
|
3838 |
/* Set up registers for signal handler. */
|
3839 |
env->gpr[1] = newsp;
|
3840 |
env->gpr[3] = signal;
|
3841 |
env->gpr[4] = (target_ulong) h2g(sc);
|
3842 |
env->nip = (target_ulong) ka->_sa_handler; |
3843 |
/* Signal handlers are entered in big-endian mode. */
|
3844 |
env->msr &= ~MSR_LE; |
3845 |
|
3846 |
unlock_user_struct(frame, frame_addr, 1);
|
3847 |
return;
|
3848 |
|
3849 |
sigsegv:
|
3850 |
unlock_user_struct(frame, frame_addr, 1);
|
3851 |
if (logfile)
|
3852 |
fprintf (logfile, "segfaulting from setup_frame\n");
|
3853 |
force_sig(SIGSEGV); |
3854 |
} |
3855 |
|
3856 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
3857 |
target_siginfo_t *info, |
3858 |
target_sigset_t *set, CPUState *env) |
3859 |
{ |
3860 |
struct target_rt_sigframe *rt_sf;
|
3861 |
struct target_mcontext *frame;
|
3862 |
target_ulong rt_sf_addr, newsp = 0;
|
3863 |
int i, err = 0; |
3864 |
int signal;
|
3865 |
|
3866 |
rt_sf_addr = get_sigframe(ka, env, sizeof(*rt_sf));
|
3867 |
if (!lock_user_struct(VERIFY_WRITE, rt_sf, rt_sf_addr, 1)) |
3868 |
goto sigsegv;
|
3869 |
|
3870 |
signal = current_exec_domain_sig(sig); |
3871 |
|
3872 |
err |= copy_siginfo_to_user(&rt_sf->info, info); |
3873 |
|
3874 |
err |= __put_user(0, &rt_sf->uc.uc_flags);
|
3875 |
err |= __put_user(0, &rt_sf->uc.uc_link);
|
3876 |
err |= __put_user((target_ulong)target_sigaltstack_used.ss_sp, |
3877 |
&rt_sf->uc.uc_stack.ss_sp); |
3878 |
err |= __put_user(sas_ss_flags(env->gpr[1]),
|
3879 |
&rt_sf->uc.uc_stack.ss_flags); |
3880 |
err |= __put_user(target_sigaltstack_used.ss_size, |
3881 |
&rt_sf->uc.uc_stack.ss_size); |
3882 |
err |= __put_user(h2g (&rt_sf->uc.uc_mcontext), |
3883 |
&rt_sf->uc.uc_regs); |
3884 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
3885 |
err |= __put_user(set->sig[i], &rt_sf->uc.uc_sigmask.sig[i]); |
3886 |
} |
3887 |
|
3888 |
frame = &rt_sf->uc.uc_mcontext; |
3889 |
err |= save_user_regs(env, frame, TARGET_NR_rt_sigreturn); |
3890 |
|
3891 |
/* The kernel checks for the presence of a VDSO here. We don't
|
3892 |
emulate a vdso, so use a sigreturn system call. */
|
3893 |
env->lr = (target_ulong) h2g(frame->tramp); |
3894 |
|
3895 |
/* Turn off all fp exceptions. */
|
3896 |
env->fpscr = 0;
|
3897 |
|
3898 |
/* Create a stack frame for the caller of the handler. */
|
3899 |
newsp = rt_sf_addr - (SIGNAL_FRAMESIZE + 16);
|
3900 |
err |= __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp);
|
3901 |
|
3902 |
if (err)
|
3903 |
goto sigsegv;
|
3904 |
|
3905 |
/* Set up registers for signal handler. */
|
3906 |
env->gpr[1] = newsp;
|
3907 |
env->gpr[3] = (target_ulong) signal;
|
3908 |
env->gpr[4] = (target_ulong) h2g(&rt_sf->info);
|
3909 |
env->gpr[5] = (target_ulong) h2g(&rt_sf->uc);
|
3910 |
env->gpr[6] = (target_ulong) h2g(rt_sf);
|
3911 |
env->nip = (target_ulong) ka->_sa_handler; |
3912 |
/* Signal handlers are entered in big-endian mode. */
|
3913 |
env->msr &= ~MSR_LE; |
3914 |
|
3915 |
unlock_user_struct(rt_sf, rt_sf_addr, 1);
|
3916 |
return;
|
3917 |
|
3918 |
sigsegv:
|
3919 |
unlock_user_struct(rt_sf, rt_sf_addr, 1);
|
3920 |
if (logfile)
|
3921 |
fprintf (logfile, "segfaulting from setup_rt_frame\n");
|
3922 |
force_sig(SIGSEGV); |
3923 |
|
3924 |
} |
3925 |
|
3926 |
long do_sigreturn(CPUState *env)
|
3927 |
{ |
3928 |
struct target_sigcontext *sc = NULL; |
3929 |
struct target_mcontext *sr = NULL; |
3930 |
target_ulong sr_addr, sc_addr; |
3931 |
sigset_t blocked; |
3932 |
target_sigset_t set; |
3933 |
|
3934 |
sc_addr = env->gpr[1] + SIGNAL_FRAMESIZE;
|
3935 |
if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1)) |
3936 |
goto sigsegv;
|
3937 |
|
3938 |
#if defined(TARGET_PPC64)
|
3939 |
set.sig[0] = sc->oldmask + ((long)(sc->_unused[3]) << 32); |
3940 |
#else
|
3941 |
if(__get_user(set.sig[0], &sc->oldmask) || |
3942 |
__get_user(set.sig[1], &sc->_unused[3])) |
3943 |
goto sigsegv;
|
3944 |
#endif
|
3945 |
target_to_host_sigset_internal(&blocked, &set); |
3946 |
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
3947 |
|
3948 |
if (__get_user(sr_addr, &sc->regs))
|
3949 |
goto sigsegv;
|
3950 |
if (!lock_user_struct(VERIFY_READ, sr, sr_addr, 1)) |
3951 |
goto sigsegv;
|
3952 |
if (restore_user_regs(env, sr, 1)) |
3953 |
goto sigsegv;
|
3954 |
|
3955 |
unlock_user_struct(sr, sr_addr, 1);
|
3956 |
unlock_user_struct(sc, sc_addr, 1);
|
3957 |
return -TARGET_QEMU_ESIGRETURN;
|
3958 |
|
3959 |
sigsegv:
|
3960 |
unlock_user_struct(sr, sr_addr, 1);
|
3961 |
unlock_user_struct(sc, sc_addr, 1);
|
3962 |
if (logfile)
|
3963 |
fprintf (logfile, "segfaulting from do_sigreturn\n");
|
3964 |
force_sig(SIGSEGV); |
3965 |
return 0; |
3966 |
} |
3967 |
|
3968 |
/* See arch/powerpc/kernel/signal_32.c. */
|
3969 |
static int do_setcontext(struct target_ucontext *ucp, CPUState *env, int sig) |
3970 |
{ |
3971 |
struct target_mcontext *mcp;
|
3972 |
target_ulong mcp_addr; |
3973 |
sigset_t blocked; |
3974 |
target_sigset_t set; |
3975 |
|
3976 |
if (copy_from_user(&set, h2g(ucp) + offsetof(struct target_ucontext, uc_sigmask), |
3977 |
sizeof (set)))
|
3978 |
return 1; |
3979 |
|
3980 |
#if defined(TARGET_PPC64)
|
3981 |
fprintf (stderr, "do_setcontext: not implemented\n");
|
3982 |
return 0; |
3983 |
#else
|
3984 |
if (__get_user(mcp_addr, &ucp->uc_regs))
|
3985 |
return 1; |
3986 |
|
3987 |
if (!lock_user_struct(VERIFY_READ, mcp, mcp_addr, 1)) |
3988 |
return 1; |
3989 |
|
3990 |
target_to_host_sigset_internal(&blocked, &set); |
3991 |
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
3992 |
if (restore_user_regs(env, mcp, sig))
|
3993 |
goto sigsegv;
|
3994 |
|
3995 |
unlock_user_struct(mcp, mcp_addr, 1);
|
3996 |
return 0; |
3997 |
|
3998 |
sigsegv:
|
3999 |
unlock_user_struct(mcp, mcp_addr, 1);
|
4000 |
return 1; |
4001 |
#endif
|
4002 |
} |
4003 |
|
4004 |
long do_rt_sigreturn(CPUState *env)
|
4005 |
{ |
4006 |
struct target_rt_sigframe *rt_sf = NULL; |
4007 |
target_ulong rt_sf_addr; |
4008 |
|
4009 |
rt_sf_addr = env->gpr[1] + SIGNAL_FRAMESIZE + 16; |
4010 |
if (!lock_user_struct(VERIFY_READ, rt_sf, rt_sf_addr, 1)) |
4011 |
goto sigsegv;
|
4012 |
|
4013 |
if (do_setcontext(&rt_sf->uc, env, 1)) |
4014 |
goto sigsegv;
|
4015 |
|
4016 |
do_sigaltstack(rt_sf_addr |
4017 |
+ offsetof(struct target_rt_sigframe, uc.uc_stack),
|
4018 |
0, env->gpr[1]); |
4019 |
|
4020 |
unlock_user_struct(rt_sf, rt_sf_addr, 1);
|
4021 |
return -TARGET_QEMU_ESIGRETURN;
|
4022 |
|
4023 |
sigsegv:
|
4024 |
unlock_user_struct(rt_sf, rt_sf_addr, 1);
|
4025 |
if (logfile)
|
4026 |
fprintf (logfile, "segfaulting from do_rt_sigreturn\n");
|
4027 |
force_sig(SIGSEGV); |
4028 |
return 0; |
4029 |
} |
4030 |
|
4031 |
#elif defined(TARGET_M68K)
|
4032 |
|
4033 |
struct target_sigcontext {
|
4034 |
abi_ulong sc_mask; |
4035 |
abi_ulong sc_usp; |
4036 |
abi_ulong sc_d0; |
4037 |
abi_ulong sc_d1; |
4038 |
abi_ulong sc_a0; |
4039 |
abi_ulong sc_a1; |
4040 |
unsigned short sc_sr; |
4041 |
abi_ulong sc_pc; |
4042 |
}; |
4043 |
|
4044 |
struct target_sigframe
|
4045 |
{ |
4046 |
abi_ulong pretcode; |
4047 |
int sig;
|
4048 |
int code;
|
4049 |
abi_ulong psc; |
4050 |
char retcode[8]; |
4051 |
abi_ulong extramask[TARGET_NSIG_WORDS-1];
|
4052 |
struct target_sigcontext sc;
|
4053 |
}; |
4054 |
|
4055 |
typedef int target_greg_t; |
4056 |
#define TARGET_NGREG 18 |
4057 |
typedef target_greg_t target_gregset_t[TARGET_NGREG];
|
4058 |
|
4059 |
typedef struct target_fpregset { |
4060 |
int f_fpcntl[3]; |
4061 |
int f_fpregs[8*3]; |
4062 |
} target_fpregset_t; |
4063 |
|
4064 |
struct target_mcontext {
|
4065 |
int version;
|
4066 |
target_gregset_t gregs; |
4067 |
target_fpregset_t fpregs; |
4068 |
}; |
4069 |
|
4070 |
#define TARGET_MCONTEXT_VERSION 2 |
4071 |
|
4072 |
struct target_ucontext {
|
4073 |
abi_ulong uc_flags; |
4074 |
abi_ulong uc_link; |
4075 |
target_stack_t uc_stack; |
4076 |
struct target_mcontext uc_mcontext;
|
4077 |
abi_long uc_filler[80];
|
4078 |
target_sigset_t uc_sigmask; |
4079 |
}; |
4080 |
|
4081 |
struct target_rt_sigframe
|
4082 |
{ |
4083 |
abi_ulong pretcode; |
4084 |
int sig;
|
4085 |
abi_ulong pinfo; |
4086 |
abi_ulong puc; |
4087 |
char retcode[8]; |
4088 |
struct target_siginfo info;
|
4089 |
struct target_ucontext uc;
|
4090 |
}; |
4091 |
|
4092 |
static int |
4093 |
setup_sigcontext(struct target_sigcontext *sc, CPUState *env, abi_ulong mask)
|
4094 |
{ |
4095 |
int err = 0; |
4096 |
|
4097 |
err |= __put_user(mask, &sc->sc_mask); |
4098 |
err |= __put_user(env->aregs[7], &sc->sc_usp);
|
4099 |
err |= __put_user(env->dregs[0], &sc->sc_d0);
|
4100 |
err |= __put_user(env->dregs[1], &sc->sc_d1);
|
4101 |
err |= __put_user(env->aregs[0], &sc->sc_a0);
|
4102 |
err |= __put_user(env->aregs[1], &sc->sc_a1);
|
4103 |
err |= __put_user(env->sr, &sc->sc_sr); |
4104 |
err |= __put_user(env->pc, &sc->sc_pc); |
4105 |
|
4106 |
return err;
|
4107 |
} |
4108 |
|
4109 |
static int |
4110 |
restore_sigcontext(CPUState *env, struct target_sigcontext *sc, int *pd0) |
4111 |
{ |
4112 |
int err = 0; |
4113 |
int temp;
|
4114 |
|
4115 |
err |= __get_user(env->aregs[7], &sc->sc_usp);
|
4116 |
err |= __get_user(env->dregs[1], &sc->sc_d1);
|
4117 |
err |= __get_user(env->aregs[0], &sc->sc_a0);
|
4118 |
err |= __get_user(env->aregs[1], &sc->sc_a1);
|
4119 |
err |= __get_user(env->pc, &sc->sc_pc); |
4120 |
err |= __get_user(temp, &sc->sc_sr); |
4121 |
env->sr = (env->sr & 0xff00) | (temp & 0xff); |
4122 |
|
4123 |
*pd0 = tswapl(sc->sc_d0); |
4124 |
|
4125 |
return err;
|
4126 |
} |
4127 |
|
4128 |
/*
|
4129 |
* Determine which stack to use..
|
4130 |
*/
|
4131 |
static inline abi_ulong |
4132 |
get_sigframe(struct target_sigaction *ka, CPUState *regs, size_t frame_size)
|
4133 |
{ |
4134 |
unsigned long sp; |
4135 |
|
4136 |
sp = regs->aregs[7];
|
4137 |
|
4138 |
/* This is the X/Open sanctioned signal stack switching. */
|
4139 |
if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) { |
4140 |
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
4141 |
} |
4142 |
|
4143 |
return ((sp - frame_size) & -8UL); |
4144 |
} |
4145 |
|
4146 |
static void setup_frame(int sig, struct target_sigaction *ka, |
4147 |
target_sigset_t *set, CPUState *env) |
4148 |
{ |
4149 |
struct target_sigframe *frame;
|
4150 |
abi_ulong frame_addr; |
4151 |
abi_ulong retcode_addr; |
4152 |
abi_ulong sc_addr; |
4153 |
int err = 0; |
4154 |
int i;
|
4155 |
|
4156 |
frame_addr = get_sigframe(ka, env, sizeof *frame);
|
4157 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
4158 |
goto give_sigsegv;
|
4159 |
|
4160 |
err |= __put_user(sig, &frame->sig); |
4161 |
|
4162 |
sc_addr = frame_addr + offsetof(struct target_sigframe, sc);
|
4163 |
err |= __put_user(sc_addr, &frame->psc); |
4164 |
|
4165 |
err |= setup_sigcontext(&frame->sc, env, set->sig[0]);
|
4166 |
if (err)
|
4167 |
goto give_sigsegv;
|
4168 |
|
4169 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
4170 |
if (__put_user(set->sig[i], &frame->extramask[i - 1])) |
4171 |
goto give_sigsegv;
|
4172 |
} |
4173 |
|
4174 |
/* Set up to return from userspace. */
|
4175 |
|
4176 |
retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
|
4177 |
err |= __put_user(retcode_addr, &frame->pretcode); |
4178 |
|
4179 |
/* moveq #,d0; trap #0 */
|
4180 |
|
4181 |
err |= __put_user(0x70004e40 + (TARGET_NR_sigreturn << 16), |
4182 |
(long *)(frame->retcode));
|
4183 |
|
4184 |
if (err)
|
4185 |
goto give_sigsegv;
|
4186 |
|
4187 |
/* Set up to return from userspace */
|
4188 |
|
4189 |
env->aregs[7] = frame_addr;
|
4190 |
env->pc = ka->_sa_handler; |
4191 |
|
4192 |
unlock_user_struct(frame, frame_addr, 1);
|
4193 |
return;
|
4194 |
|
4195 |
give_sigsegv:
|
4196 |
unlock_user_struct(frame, frame_addr, 1);
|
4197 |
force_sig(SIGSEGV); |
4198 |
} |
4199 |
|
4200 |
static inline int target_rt_setup_ucontext(struct target_ucontext *uc, |
4201 |
CPUState *env) |
4202 |
{ |
4203 |
target_greg_t *gregs = uc->uc_mcontext.gregs; |
4204 |
int err;
|
4205 |
|
4206 |
err = __put_user(TARGET_MCONTEXT_VERSION, &uc->uc_mcontext.version); |
4207 |
err |= __put_user(env->dregs[0], &gregs[0]); |
4208 |
err |= __put_user(env->dregs[1], &gregs[1]); |
4209 |
err |= __put_user(env->dregs[2], &gregs[2]); |
4210 |
err |= __put_user(env->dregs[3], &gregs[3]); |
4211 |
err |= __put_user(env->dregs[4], &gregs[4]); |
4212 |
err |= __put_user(env->dregs[5], &gregs[5]); |
4213 |
err |= __put_user(env->dregs[6], &gregs[6]); |
4214 |
err |= __put_user(env->dregs[7], &gregs[7]); |
4215 |
err |= __put_user(env->aregs[0], &gregs[8]); |
4216 |
err |= __put_user(env->aregs[1], &gregs[9]); |
4217 |
err |= __put_user(env->aregs[2], &gregs[10]); |
4218 |
err |= __put_user(env->aregs[3], &gregs[11]); |
4219 |
err |= __put_user(env->aregs[4], &gregs[12]); |
4220 |
err |= __put_user(env->aregs[5], &gregs[13]); |
4221 |
err |= __put_user(env->aregs[6], &gregs[14]); |
4222 |
err |= __put_user(env->aregs[7], &gregs[15]); |
4223 |
err |= __put_user(env->pc, &gregs[16]);
|
4224 |
err |= __put_user(env->sr, &gregs[17]);
|
4225 |
|
4226 |
return err;
|
4227 |
} |
4228 |
|
4229 |
static inline int target_rt_restore_ucontext(CPUState *env, |
4230 |
struct target_ucontext *uc,
|
4231 |
int *pd0)
|
4232 |
{ |
4233 |
int temp;
|
4234 |
int err;
|
4235 |
target_greg_t *gregs = uc->uc_mcontext.gregs; |
4236 |
|
4237 |
err = __get_user(temp, &uc->uc_mcontext.version); |
4238 |
if (temp != TARGET_MCONTEXT_VERSION)
|
4239 |
goto badframe;
|
4240 |
|
4241 |
/* restore passed registers */
|
4242 |
err |= __get_user(env->dregs[0], &gregs[0]); |
4243 |
err |= __get_user(env->dregs[1], &gregs[1]); |
4244 |
err |= __get_user(env->dregs[2], &gregs[2]); |
4245 |
err |= __get_user(env->dregs[3], &gregs[3]); |
4246 |
err |= __get_user(env->dregs[4], &gregs[4]); |
4247 |
err |= __get_user(env->dregs[5], &gregs[5]); |
4248 |
err |= __get_user(env->dregs[6], &gregs[6]); |
4249 |
err |= __get_user(env->dregs[7], &gregs[7]); |
4250 |
err |= __get_user(env->aregs[0], &gregs[8]); |
4251 |
err |= __get_user(env->aregs[1], &gregs[9]); |
4252 |
err |= __get_user(env->aregs[2], &gregs[10]); |
4253 |
err |= __get_user(env->aregs[3], &gregs[11]); |
4254 |
err |= __get_user(env->aregs[4], &gregs[12]); |
4255 |
err |= __get_user(env->aregs[5], &gregs[13]); |
4256 |
err |= __get_user(env->aregs[6], &gregs[14]); |
4257 |
err |= __get_user(env->aregs[7], &gregs[15]); |
4258 |
err |= __get_user(env->pc, &gregs[16]);
|
4259 |
err |= __get_user(temp, &gregs[17]);
|
4260 |
env->sr = (env->sr & 0xff00) | (temp & 0xff); |
4261 |
|
4262 |
*pd0 = env->dregs[0];
|
4263 |
return err;
|
4264 |
|
4265 |
badframe:
|
4266 |
return 1; |
4267 |
} |
4268 |
|
4269 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
4270 |
target_siginfo_t *info, |
4271 |
target_sigset_t *set, CPUState *env) |
4272 |
{ |
4273 |
struct target_rt_sigframe *frame;
|
4274 |
abi_ulong frame_addr; |
4275 |
abi_ulong retcode_addr; |
4276 |
abi_ulong info_addr; |
4277 |
abi_ulong uc_addr; |
4278 |
int err = 0; |
4279 |
int i;
|
4280 |
|
4281 |
frame_addr = get_sigframe(ka, env, sizeof *frame);
|
4282 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
4283 |
goto give_sigsegv;
|
4284 |
|
4285 |
err |= __put_user(sig, &frame->sig); |
4286 |
|
4287 |
info_addr = frame_addr + offsetof(struct target_rt_sigframe, info);
|
4288 |
err |= __put_user(info_addr, &frame->pinfo); |
4289 |
|
4290 |
uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc);
|
4291 |
err |= __put_user(uc_addr, &frame->puc); |
4292 |
|
4293 |
err |= copy_siginfo_to_user(&frame->info, info); |
4294 |
|
4295 |
/* Create the ucontext */
|
4296 |
|
4297 |
err |= __put_user(0, &frame->uc.uc_flags);
|
4298 |
err |= __put_user(0, &frame->uc.uc_link);
|
4299 |
err |= __put_user(target_sigaltstack_used.ss_sp, |
4300 |
&frame->uc.uc_stack.ss_sp); |
4301 |
err |= __put_user(sas_ss_flags(env->aregs[7]),
|
4302 |
&frame->uc.uc_stack.ss_flags); |
4303 |
err |= __put_user(target_sigaltstack_used.ss_size, |
4304 |
&frame->uc.uc_stack.ss_size); |
4305 |
err |= target_rt_setup_ucontext(&frame->uc, env); |
4306 |
|
4307 |
if (err)
|
4308 |
goto give_sigsegv;
|
4309 |
|
4310 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
4311 |
if (__put_user(set->sig[i], &frame->uc.uc_sigmask.sig[i]))
|
4312 |
goto give_sigsegv;
|
4313 |
} |
4314 |
|
4315 |
/* Set up to return from userspace. */
|
4316 |
|
4317 |
retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
|
4318 |
err |= __put_user(retcode_addr, &frame->pretcode); |
4319 |
|
4320 |
/* moveq #,d0; notb d0; trap #0 */
|
4321 |
|
4322 |
err |= __put_user(0x70004600 + ((TARGET_NR_rt_sigreturn ^ 0xff) << 16), |
4323 |
(long *)(frame->retcode + 0)); |
4324 |
err |= __put_user(0x4e40, (short *)(frame->retcode + 4)); |
4325 |
|
4326 |
if (err)
|
4327 |
goto give_sigsegv;
|
4328 |
|
4329 |
/* Set up to return from userspace */
|
4330 |
|
4331 |
env->aregs[7] = frame_addr;
|
4332 |
env->pc = ka->_sa_handler; |
4333 |
|
4334 |
unlock_user_struct(frame, frame_addr, 1);
|
4335 |
return;
|
4336 |
|
4337 |
give_sigsegv:
|
4338 |
unlock_user_struct(frame, frame_addr, 1);
|
4339 |
force_sig(SIGSEGV); |
4340 |
} |
4341 |
|
4342 |
long do_sigreturn(CPUState *env)
|
4343 |
{ |
4344 |
struct target_sigframe *frame;
|
4345 |
abi_ulong frame_addr = env->aregs[7] - 4; |
4346 |
target_sigset_t target_set; |
4347 |
sigset_t set; |
4348 |
int d0, i;
|
4349 |
|
4350 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
4351 |
goto badframe;
|
4352 |
|
4353 |
/* set blocked signals */
|
4354 |
|
4355 |
if (__get_user(target_set.sig[0], &frame->sc.sc_mask)) |
4356 |
goto badframe;
|
4357 |
|
4358 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
4359 |
if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) |
4360 |
goto badframe;
|
4361 |
} |
4362 |
|
4363 |
target_to_host_sigset_internal(&set, &target_set); |
4364 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
4365 |
|
4366 |
/* restore registers */
|
4367 |
|
4368 |
if (restore_sigcontext(env, &frame->sc, &d0))
|
4369 |
goto badframe;
|
4370 |
|
4371 |
unlock_user_struct(frame, frame_addr, 0);
|
4372 |
return d0;
|
4373 |
|
4374 |
badframe:
|
4375 |
unlock_user_struct(frame, frame_addr, 0);
|
4376 |
force_sig(TARGET_SIGSEGV); |
4377 |
return 0; |
4378 |
} |
4379 |
|
4380 |
long do_rt_sigreturn(CPUState *env)
|
4381 |
{ |
4382 |
struct target_rt_sigframe *frame;
|
4383 |
abi_ulong frame_addr = env->aregs[7] - 4; |
4384 |
target_sigset_t target_set; |
4385 |
sigset_t set; |
4386 |
int d0;
|
4387 |
|
4388 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
4389 |
goto badframe;
|
4390 |
|
4391 |
target_to_host_sigset_internal(&set, &target_set); |
4392 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
4393 |
|
4394 |
/* restore registers */
|
4395 |
|
4396 |
if (target_rt_restore_ucontext(env, &frame->uc, &d0))
|
4397 |
goto badframe;
|
4398 |
|
4399 |
if (do_sigaltstack(frame_addr +
|
4400 |
offsetof(struct target_rt_sigframe, uc.uc_stack),
|
4401 |
0, get_sp_from_cpustate(env)) == -EFAULT)
|
4402 |
goto badframe;
|
4403 |
|
4404 |
unlock_user_struct(frame, frame_addr, 0);
|
4405 |
return d0;
|
4406 |
|
4407 |
badframe:
|
4408 |
unlock_user_struct(frame, frame_addr, 0);
|
4409 |
force_sig(TARGET_SIGSEGV); |
4410 |
return 0; |
4411 |
} |
4412 |
|
4413 |
#else
|
4414 |
|
4415 |
static void setup_frame(int sig, struct target_sigaction *ka, |
4416 |
target_sigset_t *set, CPUState *env) |
4417 |
{ |
4418 |
fprintf(stderr, "setup_frame: not implemented\n");
|
4419 |
} |
4420 |
|
4421 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
4422 |
target_siginfo_t *info, |
4423 |
target_sigset_t *set, CPUState *env) |
4424 |
{ |
4425 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
4426 |
} |
4427 |
|
4428 |
long do_sigreturn(CPUState *env)
|
4429 |
{ |
4430 |
fprintf(stderr, "do_sigreturn: not implemented\n");
|
4431 |
return -TARGET_ENOSYS;
|
4432 |
} |
4433 |
|
4434 |
long do_rt_sigreturn(CPUState *env)
|
4435 |
{ |
4436 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
4437 |
return -TARGET_ENOSYS;
|
4438 |
} |
4439 |
|
4440 |
#endif
|
4441 |
|
4442 |
void process_pending_signals(CPUState *cpu_env)
|
4443 |
{ |
4444 |
int sig;
|
4445 |
abi_ulong handler; |
4446 |
sigset_t set, old_set; |
4447 |
target_sigset_t target_old_set; |
4448 |
struct emulated_sigtable *k;
|
4449 |
struct target_sigaction *sa;
|
4450 |
struct sigqueue *q;
|
4451 |
TaskState *ts = cpu_env->opaque; |
4452 |
|
4453 |
if (!ts->signal_pending)
|
4454 |
return;
|
4455 |
|
4456 |
/* FIXME: This is not threadsafe. */
|
4457 |
k = ts->sigtab; |
4458 |
for(sig = 1; sig <= TARGET_NSIG; sig++) { |
4459 |
if (k->pending)
|
4460 |
goto handle_signal;
|
4461 |
k++; |
4462 |
} |
4463 |
/* if no signal is pending, just return */
|
4464 |
ts->signal_pending = 0;
|
4465 |
return;
|
4466 |
|
4467 |
handle_signal:
|
4468 |
#ifdef DEBUG_SIGNAL
|
4469 |
fprintf(stderr, "qemu: process signal %d\n", sig);
|
4470 |
#endif
|
4471 |
/* dequeue signal */
|
4472 |
q = k->first; |
4473 |
k->first = q->next; |
4474 |
if (!k->first)
|
4475 |
k->pending = 0;
|
4476 |
|
4477 |
sig = gdb_handlesig (cpu_env, sig); |
4478 |
if (!sig) {
|
4479 |
sa = NULL;
|
4480 |
handler = TARGET_SIG_IGN; |
4481 |
} else {
|
4482 |
sa = &sigact_table[sig - 1];
|
4483 |
handler = sa->_sa_handler; |
4484 |
} |
4485 |
|
4486 |
if (handler == TARGET_SIG_DFL) {
|
4487 |
/* default handler : ignore some signal. The other are job control or fatal */
|
4488 |
if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
|
4489 |
kill(getpid(),SIGSTOP); |
4490 |
} else if (sig != TARGET_SIGCHLD && |
4491 |
sig != TARGET_SIGURG && |
4492 |
sig != TARGET_SIGWINCH && |
4493 |
sig != TARGET_SIGCONT) { |
4494 |
force_sig(sig); |
4495 |
} |
4496 |
} else if (handler == TARGET_SIG_IGN) { |
4497 |
/* ignore sig */
|
4498 |
} else if (handler == TARGET_SIG_ERR) { |
4499 |
force_sig(sig); |
4500 |
} else {
|
4501 |
/* compute the blocked signals during the handler execution */
|
4502 |
target_to_host_sigset(&set, &sa->sa_mask); |
4503 |
/* SA_NODEFER indicates that the current signal should not be
|
4504 |
blocked during the handler */
|
4505 |
if (!(sa->sa_flags & TARGET_SA_NODEFER))
|
4506 |
sigaddset(&set, target_to_host_signal(sig)); |
4507 |
|
4508 |
/* block signals in the handler using Linux */
|
4509 |
sigprocmask(SIG_BLOCK, &set, &old_set); |
4510 |
/* save the previous blocked signal state to restore it at the
|
4511 |
end of the signal execution (see do_sigreturn) */
|
4512 |
host_to_target_sigset_internal(&target_old_set, &old_set); |
4513 |
|
4514 |
/* if the CPU is in VM86 mode, we restore the 32 bit values */
|
4515 |
#if defined(TARGET_I386) && !defined(TARGET_X86_64)
|
4516 |
{ |
4517 |
CPUX86State *env = cpu_env; |
4518 |
if (env->eflags & VM_MASK)
|
4519 |
save_v86_state(env); |
4520 |
} |
4521 |
#endif
|
4522 |
/* prepare the stack frame of the virtual CPU */
|
4523 |
if (sa->sa_flags & TARGET_SA_SIGINFO)
|
4524 |
setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env); |
4525 |
else
|
4526 |
setup_frame(sig, sa, &target_old_set, cpu_env); |
4527 |
if (sa->sa_flags & TARGET_SA_RESETHAND)
|
4528 |
sa->_sa_handler = TARGET_SIG_DFL; |
4529 |
} |
4530 |
if (q != &k->info)
|
4531 |
free_sigqueue(cpu_env, q); |
4532 |
} |