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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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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* MA 02110-1301, USA.
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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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|
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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[65] = { |
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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[65]; |
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|
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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 > 64) |
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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 > 64) |
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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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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 <= 64; 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 <= 64; 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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} |
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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)); |
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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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} |
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} |
332 |
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/* signal queue handling */
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|
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static inline struct sigqueue *alloc_sigqueue(CPUState *env) |
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{ |
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TaskState *ts = env->opaque; |
338 |
struct sigqueue *q = ts->first_free;
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if (!q)
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return NULL; |
341 |
ts->first_free = q->next; |
342 |
return q;
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} |
344 |
|
345 |
static inline void free_sigqueue(CPUState *env, struct sigqueue *q) |
346 |
{ |
347 |
TaskState *ts = env->opaque; |
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q->next = ts->first_free; |
349 |
ts->first_free = q; |
350 |
} |
351 |
|
352 |
/* abort execution with signal */
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static void QEMU_NORETURN force_sig(int sig) |
354 |
{ |
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int host_sig;
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struct sigaction act;
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host_sig = target_to_host_signal(sig); |
358 |
fprintf(stderr, "qemu: uncaught target signal %d (%s) - exiting\n",
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sig, strsignal(host_sig)); |
360 |
gdb_signalled(thread_env, sig); |
361 |
|
362 |
/* The proper exit code for dieing from an uncaught signal is
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* -<signal>. The kernel doesn't allow exit() or _exit() to pass
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* a negative value. To get the proper exit code we need to
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* actually die from an uncaught signal. Here the default signal
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* handler is installed, we send ourself a signal and we wait for
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* it to arrive. */
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sigfillset(&act.sa_mask); |
369 |
act.sa_handler = SIG_DFL; |
370 |
sigaction(host_sig, &act, NULL);
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371 |
|
372 |
/* For some reason raise(host_sig) doesn't send the signal when
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373 |
* statically linked on x86-64. */
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374 |
kill(getpid(), host_sig); |
375 |
|
376 |
/* Make sure the signal isn't masked (just reuse the mask inside
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of act) */
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378 |
sigdelset(&act.sa_mask, host_sig); |
379 |
sigsuspend(&act.sa_mask); |
380 |
|
381 |
/* unreachable */
|
382 |
assert(0);
|
383 |
|
384 |
} |
385 |
|
386 |
/* queue a signal so that it will be send to the virtual CPU as soon
|
387 |
as possible */
|
388 |
int queue_signal(CPUState *env, int sig, target_siginfo_t *info) |
389 |
{ |
390 |
TaskState *ts = env->opaque; |
391 |
struct emulated_sigtable *k;
|
392 |
struct sigqueue *q, **pq;
|
393 |
abi_ulong handler; |
394 |
int queue;
|
395 |
|
396 |
#if defined(DEBUG_SIGNAL)
|
397 |
fprintf(stderr, "queue_signal: sig=%d\n",
|
398 |
sig); |
399 |
#endif
|
400 |
k = &ts->sigtab[sig - 1];
|
401 |
queue = gdb_queuesig (); |
402 |
handler = sigact_table[sig - 1]._sa_handler;
|
403 |
if (!queue && handler == TARGET_SIG_DFL) {
|
404 |
if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
|
405 |
kill(getpid(),SIGSTOP); |
406 |
return 0; |
407 |
} else
|
408 |
/* default handler : ignore some signal. The other are fatal */
|
409 |
if (sig != TARGET_SIGCHLD &&
|
410 |
sig != TARGET_SIGURG && |
411 |
sig != TARGET_SIGWINCH && |
412 |
sig != TARGET_SIGCONT) { |
413 |
force_sig(sig); |
414 |
} else {
|
415 |
return 0; /* indicate ignored */ |
416 |
} |
417 |
} else if (!queue && handler == TARGET_SIG_IGN) { |
418 |
/* ignore signal */
|
419 |
return 0; |
420 |
} else if (!queue && handler == TARGET_SIG_ERR) { |
421 |
force_sig(sig); |
422 |
} else {
|
423 |
pq = &k->first; |
424 |
if (sig < TARGET_SIGRTMIN) {
|
425 |
/* if non real time signal, we queue exactly one signal */
|
426 |
if (!k->pending)
|
427 |
q = &k->info; |
428 |
else
|
429 |
return 0; |
430 |
} else {
|
431 |
if (!k->pending) {
|
432 |
/* first signal */
|
433 |
q = &k->info; |
434 |
} else {
|
435 |
q = alloc_sigqueue(env); |
436 |
if (!q)
|
437 |
return -EAGAIN;
|
438 |
while (*pq != NULL) |
439 |
pq = &(*pq)->next; |
440 |
} |
441 |
} |
442 |
*pq = q; |
443 |
q->info = *info; |
444 |
q->next = NULL;
|
445 |
k->pending = 1;
|
446 |
/* signal that a new signal is pending */
|
447 |
ts->signal_pending = 1;
|
448 |
return 1; /* indicates that the signal was queued */ |
449 |
} |
450 |
} |
451 |
|
452 |
static void host_signal_handler(int host_signum, siginfo_t *info, |
453 |
void *puc)
|
454 |
{ |
455 |
int sig;
|
456 |
target_siginfo_t tinfo; |
457 |
|
458 |
/* the CPU emulator uses some host signals to detect exceptions,
|
459 |
we forward to it some signals */
|
460 |
if ((host_signum == SIGSEGV || host_signum == SIGBUS)
|
461 |
&& info->si_code > 0) {
|
462 |
if (cpu_signal_handler(host_signum, info, puc))
|
463 |
return;
|
464 |
} |
465 |
|
466 |
/* get target signal number */
|
467 |
sig = host_to_target_signal(host_signum); |
468 |
if (sig < 1 || sig > TARGET_NSIG) |
469 |
return;
|
470 |
#if defined(DEBUG_SIGNAL)
|
471 |
fprintf(stderr, "qemu: got signal %d\n", sig);
|
472 |
#endif
|
473 |
host_to_target_siginfo_noswap(&tinfo, info); |
474 |
if (queue_signal(thread_env, sig, &tinfo) == 1) { |
475 |
/* interrupt the virtual CPU as soon as possible */
|
476 |
cpu_exit(thread_env); |
477 |
} |
478 |
} |
479 |
|
480 |
/* do_sigaltstack() returns target values and errnos. */
|
481 |
/* compare linux/kernel/signal.c:do_sigaltstack() */
|
482 |
abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp) |
483 |
{ |
484 |
int ret;
|
485 |
struct target_sigaltstack oss;
|
486 |
|
487 |
/* XXX: test errors */
|
488 |
if(uoss_addr)
|
489 |
{ |
490 |
__put_user(target_sigaltstack_used.ss_sp, &oss.ss_sp); |
491 |
__put_user(target_sigaltstack_used.ss_size, &oss.ss_size); |
492 |
__put_user(sas_ss_flags(sp), &oss.ss_flags); |
493 |
} |
494 |
|
495 |
if(uss_addr)
|
496 |
{ |
497 |
struct target_sigaltstack *uss;
|
498 |
struct target_sigaltstack ss;
|
499 |
|
500 |
ret = -TARGET_EFAULT; |
501 |
if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1) |
502 |
|| __get_user(ss.ss_sp, &uss->ss_sp) |
503 |
|| __get_user(ss.ss_size, &uss->ss_size) |
504 |
|| __get_user(ss.ss_flags, &uss->ss_flags)) |
505 |
goto out;
|
506 |
unlock_user_struct(uss, uss_addr, 0);
|
507 |
|
508 |
ret = -TARGET_EPERM; |
509 |
if (on_sig_stack(sp))
|
510 |
goto out;
|
511 |
|
512 |
ret = -TARGET_EINVAL; |
513 |
if (ss.ss_flags != TARGET_SS_DISABLE
|
514 |
&& ss.ss_flags != TARGET_SS_ONSTACK |
515 |
&& ss.ss_flags != 0)
|
516 |
goto out;
|
517 |
|
518 |
if (ss.ss_flags == TARGET_SS_DISABLE) {
|
519 |
ss.ss_size = 0;
|
520 |
ss.ss_sp = 0;
|
521 |
} else {
|
522 |
ret = -TARGET_ENOMEM; |
523 |
if (ss.ss_size < MINSIGSTKSZ)
|
524 |
goto out;
|
525 |
} |
526 |
|
527 |
target_sigaltstack_used.ss_sp = ss.ss_sp; |
528 |
target_sigaltstack_used.ss_size = ss.ss_size; |
529 |
} |
530 |
|
531 |
if (uoss_addr) {
|
532 |
ret = -TARGET_EFAULT; |
533 |
if (copy_to_user(uoss_addr, &oss, sizeof(oss))) |
534 |
goto out;
|
535 |
} |
536 |
|
537 |
ret = 0;
|
538 |
out:
|
539 |
return ret;
|
540 |
} |
541 |
|
542 |
/* do_sigaction() return host values and errnos */
|
543 |
int do_sigaction(int sig, const struct target_sigaction *act, |
544 |
struct target_sigaction *oact)
|
545 |
{ |
546 |
struct target_sigaction *k;
|
547 |
struct sigaction act1;
|
548 |
int host_sig;
|
549 |
int ret = 0; |
550 |
|
551 |
if (sig < 1 || sig > TARGET_NSIG || sig == TARGET_SIGKILL || sig == TARGET_SIGSTOP) |
552 |
return -EINVAL;
|
553 |
k = &sigact_table[sig - 1];
|
554 |
#if defined(DEBUG_SIGNAL)
|
555 |
fprintf(stderr, "sigaction sig=%d act=0x%08x, oact=0x%08x\n",
|
556 |
sig, (int)act, (int)oact); |
557 |
#endif
|
558 |
if (oact) {
|
559 |
oact->_sa_handler = tswapl(k->_sa_handler); |
560 |
oact->sa_flags = tswapl(k->sa_flags); |
561 |
#if !defined(TARGET_MIPS)
|
562 |
oact->sa_restorer = tswapl(k->sa_restorer); |
563 |
#endif
|
564 |
oact->sa_mask = k->sa_mask; |
565 |
} |
566 |
if (act) {
|
567 |
/* FIXME: This is not threadsafe. */
|
568 |
k->_sa_handler = tswapl(act->_sa_handler); |
569 |
k->sa_flags = tswapl(act->sa_flags); |
570 |
#if !defined(TARGET_MIPS)
|
571 |
k->sa_restorer = tswapl(act->sa_restorer); |
572 |
#endif
|
573 |
k->sa_mask = act->sa_mask; |
574 |
|
575 |
/* we update the host linux signal state */
|
576 |
host_sig = target_to_host_signal(sig); |
577 |
if (host_sig != SIGSEGV && host_sig != SIGBUS) {
|
578 |
sigfillset(&act1.sa_mask); |
579 |
act1.sa_flags = SA_SIGINFO; |
580 |
if (k->sa_flags & TARGET_SA_RESTART)
|
581 |
act1.sa_flags |= SA_RESTART; |
582 |
/* NOTE: it is important to update the host kernel signal
|
583 |
ignore state to avoid getting unexpected interrupted
|
584 |
syscalls */
|
585 |
if (k->_sa_handler == TARGET_SIG_IGN) {
|
586 |
act1.sa_sigaction = (void *)SIG_IGN;
|
587 |
} else if (k->_sa_handler == TARGET_SIG_DFL) { |
588 |
if (fatal_signal (sig))
|
589 |
act1.sa_sigaction = host_signal_handler; |
590 |
else
|
591 |
act1.sa_sigaction = (void *)SIG_DFL;
|
592 |
} else {
|
593 |
act1.sa_sigaction = host_signal_handler; |
594 |
} |
595 |
ret = sigaction(host_sig, &act1, NULL);
|
596 |
} |
597 |
} |
598 |
return ret;
|
599 |
} |
600 |
|
601 |
static inline int copy_siginfo_to_user(target_siginfo_t *tinfo, |
602 |
const target_siginfo_t *info)
|
603 |
{ |
604 |
tswap_siginfo(tinfo, info); |
605 |
return 0; |
606 |
} |
607 |
|
608 |
static inline int current_exec_domain_sig(int sig) |
609 |
{ |
610 |
return /* current->exec_domain && current->exec_domain->signal_invmap |
611 |
&& sig < 32 ? current->exec_domain->signal_invmap[sig] : */ sig;
|
612 |
} |
613 |
|
614 |
#if defined(TARGET_I386) && TARGET_ABI_BITS == 32 |
615 |
|
616 |
/* from the Linux kernel */
|
617 |
|
618 |
struct target_fpreg {
|
619 |
uint16_t significand[4];
|
620 |
uint16_t exponent; |
621 |
}; |
622 |
|
623 |
struct target_fpxreg {
|
624 |
uint16_t significand[4];
|
625 |
uint16_t exponent; |
626 |
uint16_t padding[3];
|
627 |
}; |
628 |
|
629 |
struct target_xmmreg {
|
630 |
abi_ulong element[4];
|
631 |
}; |
632 |
|
633 |
struct target_fpstate {
|
634 |
/* Regular FPU environment */
|
635 |
abi_ulong cw; |
636 |
abi_ulong sw; |
637 |
abi_ulong tag; |
638 |
abi_ulong ipoff; |
639 |
abi_ulong cssel; |
640 |
abi_ulong dataoff; |
641 |
abi_ulong datasel; |
642 |
struct target_fpreg _st[8]; |
643 |
uint16_t status; |
644 |
uint16_t magic; /* 0xffff = regular FPU data only */
|
645 |
|
646 |
/* FXSR FPU environment */
|
647 |
abi_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */ |
648 |
abi_ulong mxcsr; |
649 |
abi_ulong reserved; |
650 |
struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */ |
651 |
struct target_xmmreg _xmm[8]; |
652 |
abi_ulong padding[56];
|
653 |
}; |
654 |
|
655 |
#define X86_FXSR_MAGIC 0x0000 |
656 |
|
657 |
struct target_sigcontext {
|
658 |
uint16_t gs, __gsh; |
659 |
uint16_t fs, __fsh; |
660 |
uint16_t es, __esh; |
661 |
uint16_t ds, __dsh; |
662 |
abi_ulong edi; |
663 |
abi_ulong esi; |
664 |
abi_ulong ebp; |
665 |
abi_ulong esp; |
666 |
abi_ulong ebx; |
667 |
abi_ulong edx; |
668 |
abi_ulong ecx; |
669 |
abi_ulong eax; |
670 |
abi_ulong trapno; |
671 |
abi_ulong err; |
672 |
abi_ulong eip; |
673 |
uint16_t cs, __csh; |
674 |
abi_ulong eflags; |
675 |
abi_ulong esp_at_signal; |
676 |
uint16_t ss, __ssh; |
677 |
abi_ulong fpstate; /* pointer */
|
678 |
abi_ulong oldmask; |
679 |
abi_ulong cr2; |
680 |
}; |
681 |
|
682 |
struct target_ucontext {
|
683 |
abi_ulong tuc_flags; |
684 |
abi_ulong tuc_link; |
685 |
target_stack_t tuc_stack; |
686 |
struct target_sigcontext tuc_mcontext;
|
687 |
target_sigset_t tuc_sigmask; /* mask last for extensibility */
|
688 |
}; |
689 |
|
690 |
struct sigframe
|
691 |
{ |
692 |
abi_ulong pretcode; |
693 |
int sig;
|
694 |
struct target_sigcontext sc;
|
695 |
struct target_fpstate fpstate;
|
696 |
abi_ulong extramask[TARGET_NSIG_WORDS-1];
|
697 |
char retcode[8]; |
698 |
}; |
699 |
|
700 |
struct rt_sigframe
|
701 |
{ |
702 |
abi_ulong pretcode; |
703 |
int sig;
|
704 |
abi_ulong pinfo; |
705 |
abi_ulong puc; |
706 |
struct target_siginfo info;
|
707 |
struct target_ucontext uc;
|
708 |
struct target_fpstate fpstate;
|
709 |
char retcode[8]; |
710 |
}; |
711 |
|
712 |
/*
|
713 |
* Set up a signal frame.
|
714 |
*/
|
715 |
|
716 |
/* XXX: save x87 state */
|
717 |
static int |
718 |
setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate, |
719 |
CPUX86State *env, abi_ulong mask, abi_ulong fpstate_addr) |
720 |
{ |
721 |
int err = 0; |
722 |
uint16_t magic; |
723 |
|
724 |
/* already locked in setup_frame() */
|
725 |
err |= __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs); |
726 |
err |= __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs); |
727 |
err |= __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es); |
728 |
err |= __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds); |
729 |
err |= __put_user(env->regs[R_EDI], &sc->edi); |
730 |
err |= __put_user(env->regs[R_ESI], &sc->esi); |
731 |
err |= __put_user(env->regs[R_EBP], &sc->ebp); |
732 |
err |= __put_user(env->regs[R_ESP], &sc->esp); |
733 |
err |= __put_user(env->regs[R_EBX], &sc->ebx); |
734 |
err |= __put_user(env->regs[R_EDX], &sc->edx); |
735 |
err |= __put_user(env->regs[R_ECX], &sc->ecx); |
736 |
err |= __put_user(env->regs[R_EAX], &sc->eax); |
737 |
err |= __put_user(env->exception_index, &sc->trapno); |
738 |
err |= __put_user(env->error_code, &sc->err); |
739 |
err |= __put_user(env->eip, &sc->eip); |
740 |
err |= __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs); |
741 |
err |= __put_user(env->eflags, &sc->eflags); |
742 |
err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal); |
743 |
err |= __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss); |
744 |
|
745 |
cpu_x86_fsave(env, fpstate_addr, 1);
|
746 |
fpstate->status = fpstate->sw; |
747 |
magic = 0xffff;
|
748 |
err |= __put_user(magic, &fpstate->magic); |
749 |
err |= __put_user(fpstate_addr, &sc->fpstate); |
750 |
|
751 |
/* non-iBCS2 extensions.. */
|
752 |
err |= __put_user(mask, &sc->oldmask); |
753 |
err |= __put_user(env->cr[2], &sc->cr2);
|
754 |
return err;
|
755 |
} |
756 |
|
757 |
/*
|
758 |
* Determine which stack to use..
|
759 |
*/
|
760 |
|
761 |
static inline abi_ulong |
762 |
get_sigframe(struct target_sigaction *ka, CPUX86State *env, size_t frame_size)
|
763 |
{ |
764 |
unsigned long esp; |
765 |
|
766 |
/* Default to using normal stack */
|
767 |
esp = env->regs[R_ESP]; |
768 |
/* This is the X/Open sanctioned signal stack switching. */
|
769 |
if (ka->sa_flags & TARGET_SA_ONSTACK) {
|
770 |
if (sas_ss_flags(esp) == 0) |
771 |
esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
772 |
} |
773 |
|
774 |
/* This is the legacy signal stack switching. */
|
775 |
else
|
776 |
if ((env->segs[R_SS].selector & 0xffff) != __USER_DS && |
777 |
!(ka->sa_flags & TARGET_SA_RESTORER) && |
778 |
ka->sa_restorer) { |
779 |
esp = (unsigned long) ka->sa_restorer; |
780 |
} |
781 |
return (esp - frame_size) & -8ul; |
782 |
} |
783 |
|
784 |
/* compare linux/arch/i386/kernel/signal.c:setup_frame() */
|
785 |
static void setup_frame(int sig, struct target_sigaction *ka, |
786 |
target_sigset_t *set, CPUX86State *env) |
787 |
{ |
788 |
abi_ulong frame_addr; |
789 |
struct sigframe *frame;
|
790 |
int i, err = 0; |
791 |
|
792 |
frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
793 |
|
794 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
795 |
goto give_sigsegv;
|
796 |
|
797 |
err |= __put_user(current_exec_domain_sig(sig), |
798 |
&frame->sig); |
799 |
if (err)
|
800 |
goto give_sigsegv;
|
801 |
|
802 |
setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0],
|
803 |
frame_addr + offsetof(struct sigframe, fpstate));
|
804 |
if (err)
|
805 |
goto give_sigsegv;
|
806 |
|
807 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
808 |
if (__put_user(set->sig[i], &frame->extramask[i - 1])) |
809 |
goto give_sigsegv;
|
810 |
} |
811 |
|
812 |
/* Set up to return from userspace. If provided, use a stub
|
813 |
already in userspace. */
|
814 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
815 |
err |= __put_user(ka->sa_restorer, &frame->pretcode); |
816 |
} else {
|
817 |
uint16_t val16; |
818 |
abi_ulong retcode_addr; |
819 |
retcode_addr = frame_addr + offsetof(struct sigframe, retcode);
|
820 |
err |= __put_user(retcode_addr, &frame->pretcode); |
821 |
/* This is popl %eax ; movl $,%eax ; int $0x80 */
|
822 |
val16 = 0xb858;
|
823 |
err |= __put_user(val16, (uint16_t *)(frame->retcode+0));
|
824 |
err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2)); |
825 |
val16 = 0x80cd;
|
826 |
err |= __put_user(val16, (uint16_t *)(frame->retcode+6));
|
827 |
} |
828 |
|
829 |
if (err)
|
830 |
goto give_sigsegv;
|
831 |
|
832 |
/* Set up registers for signal handler */
|
833 |
env->regs[R_ESP] = frame_addr; |
834 |
env->eip = ka->_sa_handler; |
835 |
|
836 |
cpu_x86_load_seg(env, R_DS, __USER_DS); |
837 |
cpu_x86_load_seg(env, R_ES, __USER_DS); |
838 |
cpu_x86_load_seg(env, R_SS, __USER_DS); |
839 |
cpu_x86_load_seg(env, R_CS, __USER_CS); |
840 |
env->eflags &= ~TF_MASK; |
841 |
|
842 |
unlock_user_struct(frame, frame_addr, 1);
|
843 |
|
844 |
return;
|
845 |
|
846 |
give_sigsegv:
|
847 |
unlock_user_struct(frame, frame_addr, 1);
|
848 |
if (sig == TARGET_SIGSEGV)
|
849 |
ka->_sa_handler = TARGET_SIG_DFL; |
850 |
force_sig(TARGET_SIGSEGV /* , current */);
|
851 |
} |
852 |
|
853 |
/* compare linux/arch/i386/kernel/signal.c:setup_rt_frame() */
|
854 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
855 |
target_siginfo_t *info, |
856 |
target_sigset_t *set, CPUX86State *env) |
857 |
{ |
858 |
abi_ulong frame_addr, addr; |
859 |
struct rt_sigframe *frame;
|
860 |
int i, err = 0; |
861 |
|
862 |
frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
863 |
|
864 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
865 |
goto give_sigsegv;
|
866 |
|
867 |
err |= __put_user(current_exec_domain_sig(sig), |
868 |
&frame->sig); |
869 |
addr = frame_addr + offsetof(struct rt_sigframe, info);
|
870 |
err |= __put_user(addr, &frame->pinfo); |
871 |
addr = frame_addr + offsetof(struct rt_sigframe, uc);
|
872 |
err |= __put_user(addr, &frame->puc); |
873 |
err |= copy_siginfo_to_user(&frame->info, info); |
874 |
if (err)
|
875 |
goto give_sigsegv;
|
876 |
|
877 |
/* Create the ucontext. */
|
878 |
err |= __put_user(0, &frame->uc.tuc_flags);
|
879 |
err |= __put_user(0, &frame->uc.tuc_link);
|
880 |
err |= __put_user(target_sigaltstack_used.ss_sp, |
881 |
&frame->uc.tuc_stack.ss_sp); |
882 |
err |= __put_user(sas_ss_flags(get_sp_from_cpustate(env)), |
883 |
&frame->uc.tuc_stack.ss_flags); |
884 |
err |= __put_user(target_sigaltstack_used.ss_size, |
885 |
&frame->uc.tuc_stack.ss_size); |
886 |
err |= setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate, |
887 |
env, set->sig[0],
|
888 |
frame_addr + offsetof(struct rt_sigframe, fpstate));
|
889 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
890 |
if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
|
891 |
goto give_sigsegv;
|
892 |
} |
893 |
|
894 |
/* Set up to return from userspace. If provided, use a stub
|
895 |
already in userspace. */
|
896 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
897 |
err |= __put_user(ka->sa_restorer, &frame->pretcode); |
898 |
} else {
|
899 |
uint16_t val16; |
900 |
addr = frame_addr + offsetof(struct rt_sigframe, retcode);
|
901 |
err |= __put_user(addr, &frame->pretcode); |
902 |
/* This is movl $,%eax ; int $0x80 */
|
903 |
err |= __put_user(0xb8, (char *)(frame->retcode+0)); |
904 |
err |= __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1)); |
905 |
val16 = 0x80cd;
|
906 |
err |= __put_user(val16, (uint16_t *)(frame->retcode+5));
|
907 |
} |
908 |
|
909 |
if (err)
|
910 |
goto give_sigsegv;
|
911 |
|
912 |
/* Set up registers for signal handler */
|
913 |
env->regs[R_ESP] = frame_addr; |
914 |
env->eip = ka->_sa_handler; |
915 |
|
916 |
cpu_x86_load_seg(env, R_DS, __USER_DS); |
917 |
cpu_x86_load_seg(env, R_ES, __USER_DS); |
918 |
cpu_x86_load_seg(env, R_SS, __USER_DS); |
919 |
cpu_x86_load_seg(env, R_CS, __USER_CS); |
920 |
env->eflags &= ~TF_MASK; |
921 |
|
922 |
unlock_user_struct(frame, frame_addr, 1);
|
923 |
|
924 |
return;
|
925 |
|
926 |
give_sigsegv:
|
927 |
unlock_user_struct(frame, frame_addr, 1);
|
928 |
if (sig == TARGET_SIGSEGV)
|
929 |
ka->_sa_handler = TARGET_SIG_DFL; |
930 |
force_sig(TARGET_SIGSEGV /* , current */);
|
931 |
} |
932 |
|
933 |
static int |
934 |
restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax) |
935 |
{ |
936 |
unsigned int err = 0; |
937 |
abi_ulong fpstate_addr; |
938 |
unsigned int tmpflags; |
939 |
|
940 |
cpu_x86_load_seg(env, R_GS, tswap16(sc->gs)); |
941 |
cpu_x86_load_seg(env, R_FS, tswap16(sc->fs)); |
942 |
cpu_x86_load_seg(env, R_ES, tswap16(sc->es)); |
943 |
cpu_x86_load_seg(env, R_DS, tswap16(sc->ds)); |
944 |
|
945 |
env->regs[R_EDI] = tswapl(sc->edi); |
946 |
env->regs[R_ESI] = tswapl(sc->esi); |
947 |
env->regs[R_EBP] = tswapl(sc->ebp); |
948 |
env->regs[R_ESP] = tswapl(sc->esp); |
949 |
env->regs[R_EBX] = tswapl(sc->ebx); |
950 |
env->regs[R_EDX] = tswapl(sc->edx); |
951 |
env->regs[R_ECX] = tswapl(sc->ecx); |
952 |
env->eip = tswapl(sc->eip); |
953 |
|
954 |
cpu_x86_load_seg(env, R_CS, lduw(&sc->cs) | 3);
|
955 |
cpu_x86_load_seg(env, R_SS, lduw(&sc->ss) | 3);
|
956 |
|
957 |
tmpflags = tswapl(sc->eflags); |
958 |
env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5); |
959 |
// regs->orig_eax = -1; /* disable syscall checks */
|
960 |
|
961 |
fpstate_addr = tswapl(sc->fpstate); |
962 |
if (fpstate_addr != 0) { |
963 |
if (!access_ok(VERIFY_READ, fpstate_addr,
|
964 |
sizeof(struct target_fpstate))) |
965 |
goto badframe;
|
966 |
cpu_x86_frstor(env, fpstate_addr, 1);
|
967 |
} |
968 |
|
969 |
*peax = tswapl(sc->eax); |
970 |
return err;
|
971 |
badframe:
|
972 |
return 1; |
973 |
} |
974 |
|
975 |
long do_sigreturn(CPUX86State *env)
|
976 |
{ |
977 |
struct sigframe *frame;
|
978 |
abi_ulong frame_addr = env->regs[R_ESP] - 8;
|
979 |
target_sigset_t target_set; |
980 |
sigset_t set; |
981 |
int eax, i;
|
982 |
|
983 |
#if defined(DEBUG_SIGNAL)
|
984 |
fprintf(stderr, "do_sigreturn\n");
|
985 |
#endif
|
986 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
987 |
goto badframe;
|
988 |
/* set blocked signals */
|
989 |
if (__get_user(target_set.sig[0], &frame->sc.oldmask)) |
990 |
goto badframe;
|
991 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
992 |
if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) |
993 |
goto badframe;
|
994 |
} |
995 |
|
996 |
target_to_host_sigset_internal(&set, &target_set); |
997 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
998 |
|
999 |
/* restore registers */
|
1000 |
if (restore_sigcontext(env, &frame->sc, &eax))
|
1001 |
goto badframe;
|
1002 |
unlock_user_struct(frame, frame_addr, 0);
|
1003 |
return eax;
|
1004 |
|
1005 |
badframe:
|
1006 |
unlock_user_struct(frame, frame_addr, 0);
|
1007 |
force_sig(TARGET_SIGSEGV); |
1008 |
return 0; |
1009 |
} |
1010 |
|
1011 |
long do_rt_sigreturn(CPUX86State *env)
|
1012 |
{ |
1013 |
abi_ulong frame_addr; |
1014 |
struct rt_sigframe *frame;
|
1015 |
sigset_t set; |
1016 |
int eax;
|
1017 |
|
1018 |
frame_addr = env->regs[R_ESP] - 4;
|
1019 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
1020 |
goto badframe;
|
1021 |
target_to_host_sigset(&set, &frame->uc.tuc_sigmask); |
1022 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
1023 |
|
1024 |
if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax))
|
1025 |
goto badframe;
|
1026 |
|
1027 |
if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0, |
1028 |
get_sp_from_cpustate(env)) == -EFAULT) |
1029 |
goto badframe;
|
1030 |
|
1031 |
unlock_user_struct(frame, frame_addr, 0);
|
1032 |
return eax;
|
1033 |
|
1034 |
badframe:
|
1035 |
unlock_user_struct(frame, frame_addr, 0);
|
1036 |
force_sig(TARGET_SIGSEGV); |
1037 |
return 0; |
1038 |
} |
1039 |
|
1040 |
#elif defined(TARGET_ARM)
|
1041 |
|
1042 |
struct target_sigcontext {
|
1043 |
abi_ulong trap_no; |
1044 |
abi_ulong error_code; |
1045 |
abi_ulong oldmask; |
1046 |
abi_ulong arm_r0; |
1047 |
abi_ulong arm_r1; |
1048 |
abi_ulong arm_r2; |
1049 |
abi_ulong arm_r3; |
1050 |
abi_ulong arm_r4; |
1051 |
abi_ulong arm_r5; |
1052 |
abi_ulong arm_r6; |
1053 |
abi_ulong arm_r7; |
1054 |
abi_ulong arm_r8; |
1055 |
abi_ulong arm_r9; |
1056 |
abi_ulong arm_r10; |
1057 |
abi_ulong arm_fp; |
1058 |
abi_ulong arm_ip; |
1059 |
abi_ulong arm_sp; |
1060 |
abi_ulong arm_lr; |
1061 |
abi_ulong arm_pc; |
1062 |
abi_ulong arm_cpsr; |
1063 |
abi_ulong fault_address; |
1064 |
}; |
1065 |
|
1066 |
struct target_ucontext_v1 {
|
1067 |
abi_ulong tuc_flags; |
1068 |
abi_ulong tuc_link; |
1069 |
target_stack_t tuc_stack; |
1070 |
struct target_sigcontext tuc_mcontext;
|
1071 |
target_sigset_t tuc_sigmask; /* mask last for extensibility */
|
1072 |
}; |
1073 |
|
1074 |
struct target_ucontext_v2 {
|
1075 |
abi_ulong tuc_flags; |
1076 |
abi_ulong tuc_link; |
1077 |
target_stack_t tuc_stack; |
1078 |
struct target_sigcontext tuc_mcontext;
|
1079 |
target_sigset_t tuc_sigmask; /* mask last for extensibility */
|
1080 |
char __unused[128 - sizeof(sigset_t)]; |
1081 |
abi_ulong tuc_regspace[128] __attribute__((__aligned__(8))); |
1082 |
}; |
1083 |
|
1084 |
struct sigframe_v1
|
1085 |
{ |
1086 |
struct target_sigcontext sc;
|
1087 |
abi_ulong extramask[TARGET_NSIG_WORDS-1];
|
1088 |
abi_ulong retcode; |
1089 |
}; |
1090 |
|
1091 |
struct sigframe_v2
|
1092 |
{ |
1093 |
struct target_ucontext_v2 uc;
|
1094 |
abi_ulong retcode; |
1095 |
}; |
1096 |
|
1097 |
struct rt_sigframe_v1
|
1098 |
{ |
1099 |
abi_ulong pinfo; |
1100 |
abi_ulong puc; |
1101 |
struct target_siginfo info;
|
1102 |
struct target_ucontext_v1 uc;
|
1103 |
abi_ulong retcode; |
1104 |
}; |
1105 |
|
1106 |
struct rt_sigframe_v2
|
1107 |
{ |
1108 |
struct target_siginfo info;
|
1109 |
struct target_ucontext_v2 uc;
|
1110 |
abi_ulong retcode; |
1111 |
}; |
1112 |
|
1113 |
#define TARGET_CONFIG_CPU_32 1 |
1114 |
|
1115 |
/*
|
1116 |
* For ARM syscalls, we encode the syscall number into the instruction.
|
1117 |
*/
|
1118 |
#define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE)) |
1119 |
#define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE)) |
1120 |
|
1121 |
/*
|
1122 |
* For Thumb syscalls, we pass the syscall number via r7. We therefore
|
1123 |
* need two 16-bit instructions.
|
1124 |
*/
|
1125 |
#define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn)) |
1126 |
#define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn)) |
1127 |
|
1128 |
static const abi_ulong retcodes[4] = { |
1129 |
SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN, |
1130 |
SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN |
1131 |
}; |
1132 |
|
1133 |
|
1134 |
#define __get_user_error(x,p,e) __get_user(x, p)
|
1135 |
|
1136 |
static inline int valid_user_regs(CPUState *regs) |
1137 |
{ |
1138 |
return 1; |
1139 |
} |
1140 |
|
1141 |
static void |
1142 |
setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/ |
1143 |
CPUState *env, abi_ulong mask) |
1144 |
{ |
1145 |
__put_user(env->regs[0], &sc->arm_r0);
|
1146 |
__put_user(env->regs[1], &sc->arm_r1);
|
1147 |
__put_user(env->regs[2], &sc->arm_r2);
|
1148 |
__put_user(env->regs[3], &sc->arm_r3);
|
1149 |
__put_user(env->regs[4], &sc->arm_r4);
|
1150 |
__put_user(env->regs[5], &sc->arm_r5);
|
1151 |
__put_user(env->regs[6], &sc->arm_r6);
|
1152 |
__put_user(env->regs[7], &sc->arm_r7);
|
1153 |
__put_user(env->regs[8], &sc->arm_r8);
|
1154 |
__put_user(env->regs[9], &sc->arm_r9);
|
1155 |
__put_user(env->regs[10], &sc->arm_r10);
|
1156 |
__put_user(env->regs[11], &sc->arm_fp);
|
1157 |
__put_user(env->regs[12], &sc->arm_ip);
|
1158 |
__put_user(env->regs[13], &sc->arm_sp);
|
1159 |
__put_user(env->regs[14], &sc->arm_lr);
|
1160 |
__put_user(env->regs[15], &sc->arm_pc);
|
1161 |
#ifdef TARGET_CONFIG_CPU_32
|
1162 |
__put_user(cpsr_read(env), &sc->arm_cpsr); |
1163 |
#endif
|
1164 |
|
1165 |
__put_user(/* current->thread.trap_no */ 0, &sc->trap_no); |
1166 |
__put_user(/* current->thread.error_code */ 0, &sc->error_code); |
1167 |
__put_user(/* current->thread.address */ 0, &sc->fault_address); |
1168 |
__put_user(mask, &sc->oldmask); |
1169 |
} |
1170 |
|
1171 |
static inline abi_ulong |
1172 |
get_sigframe(struct target_sigaction *ka, CPUState *regs, int framesize) |
1173 |
{ |
1174 |
unsigned long sp = regs->regs[13]; |
1175 |
|
1176 |
/*
|
1177 |
* This is the X/Open sanctioned signal stack switching.
|
1178 |
*/
|
1179 |
if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp))
|
1180 |
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
1181 |
/*
|
1182 |
* ATPCS B01 mandates 8-byte alignment
|
1183 |
*/
|
1184 |
return (sp - framesize) & ~7; |
1185 |
} |
1186 |
|
1187 |
static int |
1188 |
setup_return(CPUState *env, struct target_sigaction *ka,
|
1189 |
abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr)
|
1190 |
{ |
1191 |
abi_ulong handler = ka->_sa_handler; |
1192 |
abi_ulong retcode; |
1193 |
int thumb = handler & 1; |
1194 |
|
1195 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
1196 |
retcode = ka->sa_restorer; |
1197 |
} else {
|
1198 |
unsigned int idx = thumb; |
1199 |
|
1200 |
if (ka->sa_flags & TARGET_SA_SIGINFO)
|
1201 |
idx += 2;
|
1202 |
|
1203 |
if (__put_user(retcodes[idx], rc))
|
1204 |
return 1; |
1205 |
#if 0
|
1206 |
flush_icache_range((abi_ulong)rc,
|
1207 |
(abi_ulong)(rc + 1));
|
1208 |
#endif
|
1209 |
retcode = rc_addr + thumb; |
1210 |
} |
1211 |
|
1212 |
env->regs[0] = usig;
|
1213 |
env->regs[13] = frame_addr;
|
1214 |
env->regs[14] = retcode;
|
1215 |
env->regs[15] = handler & (thumb ? ~1 : ~3); |
1216 |
env->thumb = thumb; |
1217 |
|
1218 |
#if 0
|
1219 |
#ifdef TARGET_CONFIG_CPU_32
|
1220 |
env->cpsr = cpsr;
|
1221 |
#endif
|
1222 |
#endif
|
1223 |
|
1224 |
return 0; |
1225 |
} |
1226 |
|
1227 |
static void setup_sigframe_v2(struct target_ucontext_v2 *uc, |
1228 |
target_sigset_t *set, CPUState *env) |
1229 |
{ |
1230 |
struct target_sigaltstack stack;
|
1231 |
int i;
|
1232 |
|
1233 |
/* Clear all the bits of the ucontext we don't use. */
|
1234 |
memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext)); |
1235 |
|
1236 |
memset(&stack, 0, sizeof(stack)); |
1237 |
__put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp); |
1238 |
__put_user(target_sigaltstack_used.ss_size, &stack.ss_size); |
1239 |
__put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags); |
1240 |
memcpy(&uc->tuc_stack, &stack, sizeof(stack));
|
1241 |
|
1242 |
setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]);
|
1243 |
/* FIXME: Save coprocessor signal frame. */
|
1244 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
1245 |
__put_user(set->sig[i], &uc->tuc_sigmask.sig[i]); |
1246 |
} |
1247 |
} |
1248 |
|
1249 |
/* compare linux/arch/arm/kernel/signal.c:setup_frame() */
|
1250 |
static void setup_frame_v1(int usig, struct target_sigaction *ka, |
1251 |
target_sigset_t *set, CPUState *regs) |
1252 |
{ |
1253 |
struct sigframe_v1 *frame;
|
1254 |
abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
|
1255 |
int i;
|
1256 |
|
1257 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
1258 |
return;
|
1259 |
|
1260 |
setup_sigcontext(&frame->sc, regs, set->sig[0]);
|
1261 |
|
1262 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
1263 |
if (__put_user(set->sig[i], &frame->extramask[i - 1])) |
1264 |
goto end;
|
1265 |
} |
1266 |
|
1267 |
setup_return(regs, ka, &frame->retcode, frame_addr, usig, |
1268 |
frame_addr + offsetof(struct sigframe_v1, retcode));
|
1269 |
|
1270 |
end:
|
1271 |
unlock_user_struct(frame, frame_addr, 1);
|
1272 |
} |
1273 |
|
1274 |
static void setup_frame_v2(int usig, struct target_sigaction *ka, |
1275 |
target_sigset_t *set, CPUState *regs) |
1276 |
{ |
1277 |
struct sigframe_v2 *frame;
|
1278 |
abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
|
1279 |
|
1280 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
1281 |
return;
|
1282 |
|
1283 |
setup_sigframe_v2(&frame->uc, set, regs); |
1284 |
|
1285 |
setup_return(regs, ka, &frame->retcode, frame_addr, usig, |
1286 |
frame_addr + offsetof(struct sigframe_v2, retcode));
|
1287 |
|
1288 |
unlock_user_struct(frame, frame_addr, 1);
|
1289 |
} |
1290 |
|
1291 |
static void setup_frame(int usig, struct target_sigaction *ka, |
1292 |
target_sigset_t *set, CPUState *regs) |
1293 |
{ |
1294 |
if (get_osversion() >= 0x020612) { |
1295 |
setup_frame_v2(usig, ka, set, regs); |
1296 |
} else {
|
1297 |
setup_frame_v1(usig, ka, set, regs); |
1298 |
} |
1299 |
} |
1300 |
|
1301 |
/* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */
|
1302 |
static void setup_rt_frame_v1(int usig, struct target_sigaction *ka, |
1303 |
target_siginfo_t *info, |
1304 |
target_sigset_t *set, CPUState *env) |
1305 |
{ |
1306 |
struct rt_sigframe_v1 *frame;
|
1307 |
abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
1308 |
struct target_sigaltstack stack;
|
1309 |
int i;
|
1310 |
abi_ulong info_addr, uc_addr; |
1311 |
|
1312 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
1313 |
return /* 1 */; |
1314 |
|
1315 |
info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info);
|
1316 |
__put_user(info_addr, &frame->pinfo); |
1317 |
uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc);
|
1318 |
__put_user(uc_addr, &frame->puc); |
1319 |
copy_siginfo_to_user(&frame->info, info); |
1320 |
|
1321 |
/* Clear all the bits of the ucontext we don't use. */
|
1322 |
memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext)); |
1323 |
|
1324 |
memset(&stack, 0, sizeof(stack)); |
1325 |
__put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp); |
1326 |
__put_user(target_sigaltstack_used.ss_size, &stack.ss_size); |
1327 |
__put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags); |
1328 |
memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
|
1329 |
|
1330 |
setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]);
|
1331 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
1332 |
if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
|
1333 |
goto end;
|
1334 |
} |
1335 |
|
1336 |
setup_return(env, ka, &frame->retcode, frame_addr, usig, |
1337 |
frame_addr + offsetof(struct rt_sigframe_v1, retcode));
|
1338 |
|
1339 |
env->regs[1] = info_addr;
|
1340 |
env->regs[2] = uc_addr;
|
1341 |
|
1342 |
end:
|
1343 |
unlock_user_struct(frame, frame_addr, 1);
|
1344 |
} |
1345 |
|
1346 |
static void setup_rt_frame_v2(int usig, struct target_sigaction *ka, |
1347 |
target_siginfo_t *info, |
1348 |
target_sigset_t *set, CPUState *env) |
1349 |
{ |
1350 |
struct rt_sigframe_v2 *frame;
|
1351 |
abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
1352 |
abi_ulong info_addr, uc_addr; |
1353 |
|
1354 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
1355 |
return /* 1 */; |
1356 |
|
1357 |
info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info);
|
1358 |
uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc);
|
1359 |
copy_siginfo_to_user(&frame->info, info); |
1360 |
|
1361 |
setup_sigframe_v2(&frame->uc, set, env); |
1362 |
|
1363 |
setup_return(env, ka, &frame->retcode, frame_addr, usig, |
1364 |
frame_addr + offsetof(struct rt_sigframe_v2, retcode));
|
1365 |
|
1366 |
env->regs[1] = info_addr;
|
1367 |
env->regs[2] = uc_addr;
|
1368 |
|
1369 |
unlock_user_struct(frame, frame_addr, 1);
|
1370 |
} |
1371 |
|
1372 |
static void setup_rt_frame(int usig, struct target_sigaction *ka, |
1373 |
target_siginfo_t *info, |
1374 |
target_sigset_t *set, CPUState *env) |
1375 |
{ |
1376 |
if (get_osversion() >= 0x020612) { |
1377 |
setup_rt_frame_v2(usig, ka, info, set, env); |
1378 |
} else {
|
1379 |
setup_rt_frame_v1(usig, ka, info, set, env); |
1380 |
} |
1381 |
} |
1382 |
|
1383 |
static int |
1384 |
restore_sigcontext(CPUState *env, struct target_sigcontext *sc)
|
1385 |
{ |
1386 |
int err = 0; |
1387 |
uint32_t cpsr; |
1388 |
|
1389 |
__get_user_error(env->regs[0], &sc->arm_r0, err);
|
1390 |
__get_user_error(env->regs[1], &sc->arm_r1, err);
|
1391 |
__get_user_error(env->regs[2], &sc->arm_r2, err);
|
1392 |
__get_user_error(env->regs[3], &sc->arm_r3, err);
|
1393 |
__get_user_error(env->regs[4], &sc->arm_r4, err);
|
1394 |
__get_user_error(env->regs[5], &sc->arm_r5, err);
|
1395 |
__get_user_error(env->regs[6], &sc->arm_r6, err);
|
1396 |
__get_user_error(env->regs[7], &sc->arm_r7, err);
|
1397 |
__get_user_error(env->regs[8], &sc->arm_r8, err);
|
1398 |
__get_user_error(env->regs[9], &sc->arm_r9, err);
|
1399 |
__get_user_error(env->regs[10], &sc->arm_r10, err);
|
1400 |
__get_user_error(env->regs[11], &sc->arm_fp, err);
|
1401 |
__get_user_error(env->regs[12], &sc->arm_ip, err);
|
1402 |
__get_user_error(env->regs[13], &sc->arm_sp, err);
|
1403 |
__get_user_error(env->regs[14], &sc->arm_lr, err);
|
1404 |
__get_user_error(env->regs[15], &sc->arm_pc, err);
|
1405 |
#ifdef TARGET_CONFIG_CPU_32
|
1406 |
__get_user_error(cpsr, &sc->arm_cpsr, err); |
1407 |
cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC); |
1408 |
#endif
|
1409 |
|
1410 |
err |= !valid_user_regs(env); |
1411 |
|
1412 |
return err;
|
1413 |
} |
1414 |
|
1415 |
static long do_sigreturn_v1(CPUState *env) |
1416 |
{ |
1417 |
abi_ulong frame_addr; |
1418 |
struct sigframe_v1 *frame;
|
1419 |
target_sigset_t set; |
1420 |
sigset_t host_set; |
1421 |
int i;
|
1422 |
|
1423 |
/*
|
1424 |
* Since we stacked the signal on a 64-bit boundary,
|
1425 |
* then 'sp' should be word aligned here. If it's
|
1426 |
* not, then the user is trying to mess with us.
|
1427 |
*/
|
1428 |
if (env->regs[13] & 7) |
1429 |
goto badframe;
|
1430 |
|
1431 |
frame_addr = env->regs[13];
|
1432 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
1433 |
goto badframe;
|
1434 |
|
1435 |
if (__get_user(set.sig[0], &frame->sc.oldmask)) |
1436 |
goto badframe;
|
1437 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
1438 |
if (__get_user(set.sig[i], &frame->extramask[i - 1])) |
1439 |
goto badframe;
|
1440 |
} |
1441 |
|
1442 |
target_to_host_sigset_internal(&host_set, &set); |
1443 |
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
1444 |
|
1445 |
if (restore_sigcontext(env, &frame->sc))
|
1446 |
goto badframe;
|
1447 |
|
1448 |
#if 0
|
1449 |
/* Send SIGTRAP if we're single-stepping */
|
1450 |
if (ptrace_cancel_bpt(current))
|
1451 |
send_sig(SIGTRAP, current, 1);
|
1452 |
#endif
|
1453 |
unlock_user_struct(frame, frame_addr, 0);
|
1454 |
return env->regs[0]; |
1455 |
|
1456 |
badframe:
|
1457 |
unlock_user_struct(frame, frame_addr, 0);
|
1458 |
force_sig(SIGSEGV /* , current */);
|
1459 |
return 0; |
1460 |
} |
1461 |
|
1462 |
static int do_sigframe_return_v2(CPUState *env, target_ulong frame_addr, |
1463 |
struct target_ucontext_v2 *uc)
|
1464 |
{ |
1465 |
sigset_t host_set; |
1466 |
|
1467 |
target_to_host_sigset(&host_set, &uc->tuc_sigmask); |
1468 |
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
1469 |
|
1470 |
if (restore_sigcontext(env, &uc->tuc_mcontext))
|
1471 |
return 1; |
1472 |
|
1473 |
if (do_sigaltstack(frame_addr + offsetof(struct target_ucontext_v2, tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) |
1474 |
return 1; |
1475 |
|
1476 |
#if 0
|
1477 |
/* Send SIGTRAP if we're single-stepping */
|
1478 |
if (ptrace_cancel_bpt(current))
|
1479 |
send_sig(SIGTRAP, current, 1);
|
1480 |
#endif
|
1481 |
|
1482 |
return 0; |
1483 |
} |
1484 |
|
1485 |
static long do_sigreturn_v2(CPUState *env) |
1486 |
{ |
1487 |
abi_ulong frame_addr; |
1488 |
struct sigframe_v2 *frame;
|
1489 |
|
1490 |
/*
|
1491 |
* Since we stacked the signal on a 64-bit boundary,
|
1492 |
* then 'sp' should be word aligned here. If it's
|
1493 |
* not, then the user is trying to mess with us.
|
1494 |
*/
|
1495 |
if (env->regs[13] & 7) |
1496 |
goto badframe;
|
1497 |
|
1498 |
frame_addr = env->regs[13];
|
1499 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
1500 |
goto badframe;
|
1501 |
|
1502 |
if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
|
1503 |
goto badframe;
|
1504 |
|
1505 |
unlock_user_struct(frame, frame_addr, 0);
|
1506 |
return env->regs[0]; |
1507 |
|
1508 |
badframe:
|
1509 |
unlock_user_struct(frame, frame_addr, 0);
|
1510 |
force_sig(SIGSEGV /* , current */);
|
1511 |
return 0; |
1512 |
} |
1513 |
|
1514 |
long do_sigreturn(CPUState *env)
|
1515 |
{ |
1516 |
if (get_osversion() >= 0x020612) { |
1517 |
return do_sigreturn_v2(env);
|
1518 |
} else {
|
1519 |
return do_sigreturn_v1(env);
|
1520 |
} |
1521 |
} |
1522 |
|
1523 |
static long do_rt_sigreturn_v1(CPUState *env) |
1524 |
{ |
1525 |
abi_ulong frame_addr; |
1526 |
struct rt_sigframe_v1 *frame;
|
1527 |
sigset_t host_set; |
1528 |
|
1529 |
/*
|
1530 |
* Since we stacked the signal on a 64-bit boundary,
|
1531 |
* then 'sp' should be word aligned here. If it's
|
1532 |
* not, then the user is trying to mess with us.
|
1533 |
*/
|
1534 |
if (env->regs[13] & 7) |
1535 |
goto badframe;
|
1536 |
|
1537 |
frame_addr = env->regs[13];
|
1538 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
1539 |
goto badframe;
|
1540 |
|
1541 |
target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask); |
1542 |
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
1543 |
|
1544 |
if (restore_sigcontext(env, &frame->uc.tuc_mcontext))
|
1545 |
goto badframe;
|
1546 |
|
1547 |
if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) |
1548 |
goto badframe;
|
1549 |
|
1550 |
#if 0
|
1551 |
/* Send SIGTRAP if we're single-stepping */
|
1552 |
if (ptrace_cancel_bpt(current))
|
1553 |
send_sig(SIGTRAP, current, 1);
|
1554 |
#endif
|
1555 |
unlock_user_struct(frame, frame_addr, 0);
|
1556 |
return env->regs[0]; |
1557 |
|
1558 |
badframe:
|
1559 |
unlock_user_struct(frame, frame_addr, 0);
|
1560 |
force_sig(SIGSEGV /* , current */);
|
1561 |
return 0; |
1562 |
} |
1563 |
|
1564 |
static long do_rt_sigreturn_v2(CPUState *env) |
1565 |
{ |
1566 |
abi_ulong frame_addr; |
1567 |
struct rt_sigframe_v2 *frame;
|
1568 |
|
1569 |
/*
|
1570 |
* Since we stacked the signal on a 64-bit boundary,
|
1571 |
* then 'sp' should be word aligned here. If it's
|
1572 |
* not, then the user is trying to mess with us.
|
1573 |
*/
|
1574 |
if (env->regs[13] & 7) |
1575 |
goto badframe;
|
1576 |
|
1577 |
frame_addr = env->regs[13];
|
1578 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
1579 |
goto badframe;
|
1580 |
|
1581 |
if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
|
1582 |
goto badframe;
|
1583 |
|
1584 |
unlock_user_struct(frame, frame_addr, 0);
|
1585 |
return env->regs[0]; |
1586 |
|
1587 |
badframe:
|
1588 |
unlock_user_struct(frame, frame_addr, 0);
|
1589 |
force_sig(SIGSEGV /* , current */);
|
1590 |
return 0; |
1591 |
} |
1592 |
|
1593 |
long do_rt_sigreturn(CPUState *env)
|
1594 |
{ |
1595 |
if (get_osversion() >= 0x020612) { |
1596 |
return do_rt_sigreturn_v2(env);
|
1597 |
} else {
|
1598 |
return do_rt_sigreturn_v1(env);
|
1599 |
} |
1600 |
} |
1601 |
|
1602 |
#elif defined(TARGET_SPARC)
|
1603 |
|
1604 |
#define __SUNOS_MAXWIN 31 |
1605 |
|
1606 |
/* This is what SunOS does, so shall I. */
|
1607 |
struct target_sigcontext {
|
1608 |
abi_ulong sigc_onstack; /* state to restore */
|
1609 |
|
1610 |
abi_ulong sigc_mask; /* sigmask to restore */
|
1611 |
abi_ulong sigc_sp; /* stack pointer */
|
1612 |
abi_ulong sigc_pc; /* program counter */
|
1613 |
abi_ulong sigc_npc; /* next program counter */
|
1614 |
abi_ulong sigc_psr; /* for condition codes etc */
|
1615 |
abi_ulong sigc_g1; /* User uses these two registers */
|
1616 |
abi_ulong sigc_o0; /* within the trampoline code. */
|
1617 |
|
1618 |
/* Now comes information regarding the users window set
|
1619 |
* at the time of the signal.
|
1620 |
*/
|
1621 |
abi_ulong sigc_oswins; /* outstanding windows */
|
1622 |
|
1623 |
/* stack ptrs for each regwin buf */
|
1624 |
char *sigc_spbuf[__SUNOS_MAXWIN];
|
1625 |
|
1626 |
/* Windows to restore after signal */
|
1627 |
struct {
|
1628 |
abi_ulong locals[8];
|
1629 |
abi_ulong ins[8];
|
1630 |
} sigc_wbuf[__SUNOS_MAXWIN]; |
1631 |
}; |
1632 |
/* A Sparc stack frame */
|
1633 |
struct sparc_stackf {
|
1634 |
abi_ulong locals[8];
|
1635 |
abi_ulong ins[6];
|
1636 |
struct sparc_stackf *fp;
|
1637 |
abi_ulong callers_pc; |
1638 |
char *structptr;
|
1639 |
abi_ulong xargs[6];
|
1640 |
abi_ulong xxargs[1];
|
1641 |
}; |
1642 |
|
1643 |
typedef struct { |
1644 |
struct {
|
1645 |
abi_ulong psr; |
1646 |
abi_ulong pc; |
1647 |
abi_ulong npc; |
1648 |
abi_ulong y; |
1649 |
abi_ulong u_regs[16]; /* globals and ins */ |
1650 |
} si_regs; |
1651 |
int si_mask;
|
1652 |
} __siginfo_t; |
1653 |
|
1654 |
typedef struct { |
1655 |
unsigned long si_float_regs [32]; |
1656 |
unsigned long si_fsr; |
1657 |
unsigned long si_fpqdepth; |
1658 |
struct {
|
1659 |
unsigned long *insn_addr; |
1660 |
unsigned long insn; |
1661 |
} si_fpqueue [16];
|
1662 |
} qemu_siginfo_fpu_t; |
1663 |
|
1664 |
|
1665 |
struct target_signal_frame {
|
1666 |
struct sparc_stackf ss;
|
1667 |
__siginfo_t info; |
1668 |
abi_ulong fpu_save; |
1669 |
abi_ulong insns[2] __attribute__ ((aligned (8))); |
1670 |
abi_ulong extramask[TARGET_NSIG_WORDS - 1];
|
1671 |
abi_ulong extra_size; /* Should be 0 */
|
1672 |
qemu_siginfo_fpu_t fpu_state; |
1673 |
}; |
1674 |
struct target_rt_signal_frame {
|
1675 |
struct sparc_stackf ss;
|
1676 |
siginfo_t info; |
1677 |
abi_ulong regs[20];
|
1678 |
sigset_t mask; |
1679 |
abi_ulong fpu_save; |
1680 |
unsigned int insns[2]; |
1681 |
stack_t stack; |
1682 |
unsigned int extra_size; /* Should be 0 */ |
1683 |
qemu_siginfo_fpu_t fpu_state; |
1684 |
}; |
1685 |
|
1686 |
#define UREG_O0 16 |
1687 |
#define UREG_O6 22 |
1688 |
#define UREG_I0 0 |
1689 |
#define UREG_I1 1 |
1690 |
#define UREG_I2 2 |
1691 |
#define UREG_I3 3 |
1692 |
#define UREG_I4 4 |
1693 |
#define UREG_I5 5 |
1694 |
#define UREG_I6 6 |
1695 |
#define UREG_I7 7 |
1696 |
#define UREG_L0 8 |
1697 |
#define UREG_FP UREG_I6
|
1698 |
#define UREG_SP UREG_O6
|
1699 |
|
1700 |
static inline abi_ulong get_sigframe(struct target_sigaction *sa, |
1701 |
CPUState *env, unsigned long framesize) |
1702 |
{ |
1703 |
abi_ulong sp; |
1704 |
|
1705 |
sp = env->regwptr[UREG_FP]; |
1706 |
|
1707 |
/* This is the X/Open sanctioned signal stack switching. */
|
1708 |
if (sa->sa_flags & TARGET_SA_ONSTACK) {
|
1709 |
if (!on_sig_stack(sp)
|
1710 |
&& !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7))
|
1711 |
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
1712 |
} |
1713 |
return sp - framesize;
|
1714 |
} |
1715 |
|
1716 |
static int |
1717 |
setup___siginfo(__siginfo_t *si, CPUState *env, abi_ulong mask) |
1718 |
{ |
1719 |
int err = 0, i; |
1720 |
|
1721 |
err |= __put_user(env->psr, &si->si_regs.psr); |
1722 |
err |= __put_user(env->pc, &si->si_regs.pc); |
1723 |
err |= __put_user(env->npc, &si->si_regs.npc); |
1724 |
err |= __put_user(env->y, &si->si_regs.y); |
1725 |
for (i=0; i < 8; i++) { |
1726 |
err |= __put_user(env->gregs[i], &si->si_regs.u_regs[i]); |
1727 |
} |
1728 |
for (i=0; i < 8; i++) { |
1729 |
err |= __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]);
|
1730 |
} |
1731 |
err |= __put_user(mask, &si->si_mask); |
1732 |
return err;
|
1733 |
} |
1734 |
|
1735 |
#if 0
|
1736 |
static int
|
1737 |
setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
|
1738 |
CPUState *env, unsigned long mask)
|
1739 |
{
|
1740 |
int err = 0;
|
1741 |
|
1742 |
err |= __put_user(mask, &sc->sigc_mask);
|
1743 |
err |= __put_user(env->regwptr[UREG_SP], &sc->sigc_sp);
|
1744 |
err |= __put_user(env->pc, &sc->sigc_pc);
|
1745 |
err |= __put_user(env->npc, &sc->sigc_npc);
|
1746 |
err |= __put_user(env->psr, &sc->sigc_psr);
|
1747 |
err |= __put_user(env->gregs[1], &sc->sigc_g1);
|
1748 |
err |= __put_user(env->regwptr[UREG_O0], &sc->sigc_o0);
|
1749 |
|
1750 |
return err;
|
1751 |
}
|
1752 |
#endif
|
1753 |
#define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7))) |
1754 |
|
1755 |
static void setup_frame(int sig, struct target_sigaction *ka, |
1756 |
target_sigset_t *set, CPUState *env) |
1757 |
{ |
1758 |
abi_ulong sf_addr; |
1759 |
struct target_signal_frame *sf;
|
1760 |
int sigframe_size, err, i;
|
1761 |
|
1762 |
/* 1. Make sure everything is clean */
|
1763 |
//synchronize_user_stack();
|
1764 |
|
1765 |
sigframe_size = NF_ALIGNEDSZ; |
1766 |
sf_addr = get_sigframe(ka, env, sigframe_size); |
1767 |
|
1768 |
sf = lock_user(VERIFY_WRITE, sf_addr, |
1769 |
sizeof(struct target_signal_frame), 0); |
1770 |
if (!sf)
|
1771 |
goto sigsegv;
|
1772 |
|
1773 |
//fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
|
1774 |
#if 0
|
1775 |
if (invalid_frame_pointer(sf, sigframe_size))
|
1776 |
goto sigill_and_return;
|
1777 |
#endif
|
1778 |
/* 2. Save the current process state */
|
1779 |
err = setup___siginfo(&sf->info, env, set->sig[0]);
|
1780 |
err |= __put_user(0, &sf->extra_size);
|
1781 |
|
1782 |
//err |= save_fpu_state(regs, &sf->fpu_state);
|
1783 |
//err |= __put_user(&sf->fpu_state, &sf->fpu_save);
|
1784 |
|
1785 |
err |= __put_user(set->sig[0], &sf->info.si_mask);
|
1786 |
for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) { |
1787 |
err |= __put_user(set->sig[i + 1], &sf->extramask[i]);
|
1788 |
} |
1789 |
|
1790 |
for (i = 0; i < 8; i++) { |
1791 |
err |= __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]); |
1792 |
} |
1793 |
for (i = 0; i < 8; i++) { |
1794 |
err |= __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]); |
1795 |
} |
1796 |
if (err)
|
1797 |
goto sigsegv;
|
1798 |
|
1799 |
/* 3. signal handler back-trampoline and parameters */
|
1800 |
env->regwptr[UREG_FP] = sf_addr; |
1801 |
env->regwptr[UREG_I0] = sig; |
1802 |
env->regwptr[UREG_I1] = sf_addr + |
1803 |
offsetof(struct target_signal_frame, info);
|
1804 |
env->regwptr[UREG_I2] = sf_addr + |
1805 |
offsetof(struct target_signal_frame, info);
|
1806 |
|
1807 |
/* 4. signal handler */
|
1808 |
env->pc = ka->_sa_handler; |
1809 |
env->npc = (env->pc + 4);
|
1810 |
/* 5. return to kernel instructions */
|
1811 |
if (ka->sa_restorer)
|
1812 |
env->regwptr[UREG_I7] = ka->sa_restorer; |
1813 |
else {
|
1814 |
uint32_t val32; |
1815 |
|
1816 |
env->regwptr[UREG_I7] = sf_addr + |
1817 |
offsetof(struct target_signal_frame, insns) - 2 * 4; |
1818 |
|
1819 |
/* mov __NR_sigreturn, %g1 */
|
1820 |
val32 = 0x821020d8;
|
1821 |
err |= __put_user(val32, &sf->insns[0]);
|
1822 |
|
1823 |
/* t 0x10 */
|
1824 |
val32 = 0x91d02010;
|
1825 |
err |= __put_user(val32, &sf->insns[1]);
|
1826 |
if (err)
|
1827 |
goto sigsegv;
|
1828 |
|
1829 |
/* Flush instruction space. */
|
1830 |
//flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
|
1831 |
// tb_flush(env);
|
1832 |
} |
1833 |
unlock_user(sf, sf_addr, sizeof(struct target_signal_frame)); |
1834 |
return;
|
1835 |
#if 0
|
1836 |
sigill_and_return:
|
1837 |
force_sig(TARGET_SIGILL);
|
1838 |
#endif
|
1839 |
sigsegv:
|
1840 |
//fprintf(stderr, "force_sig\n");
|
1841 |
unlock_user(sf, sf_addr, sizeof(struct target_signal_frame)); |
1842 |
force_sig(TARGET_SIGSEGV); |
1843 |
} |
1844 |
static inline int |
1845 |
restore_fpu_state(CPUState *env, qemu_siginfo_fpu_t *fpu) |
1846 |
{ |
1847 |
int err;
|
1848 |
#if 0
|
1849 |
#ifdef CONFIG_SMP
|
1850 |
if (current->flags & PF_USEDFPU)
|
1851 |
regs->psr &= ~PSR_EF;
|
1852 |
#else
|
1853 |
if (current == last_task_used_math) {
|
1854 |
last_task_used_math = 0;
|
1855 |
regs->psr &= ~PSR_EF; |
1856 |
} |
1857 |
#endif
|
1858 |
current->used_math = 1;
|
1859 |
current->flags &= ~PF_USEDFPU; |
1860 |
#endif
|
1861 |
#if 0
|
1862 |
if (verify_area (VERIFY_READ, fpu, sizeof(*fpu)))
|
1863 |
return -EFAULT;
|
1864 |
#endif
|
1865 |
|
1866 |
#if 0
|
1867 |
/* XXX: incorrect */
|
1868 |
err = __copy_from_user(&env->fpr[0], &fpu->si_float_regs[0],
|
1869 |
(sizeof(unsigned long) * 32));
|
1870 |
#endif
|
1871 |
err |= __get_user(env->fsr, &fpu->si_fsr); |
1872 |
#if 0
|
1873 |
err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
|
1874 |
if (current->thread.fpqdepth != 0)
|
1875 |
err |= __copy_from_user(¤t->thread.fpqueue[0],
|
1876 |
&fpu->si_fpqueue[0],
|
1877 |
((sizeof(unsigned long) +
|
1878 |
(sizeof(unsigned long *)))*16));
|
1879 |
#endif
|
1880 |
return err;
|
1881 |
} |
1882 |
|
1883 |
|
1884 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
1885 |
target_siginfo_t *info, |
1886 |
target_sigset_t *set, CPUState *env) |
1887 |
{ |
1888 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
1889 |
} |
1890 |
|
1891 |
long do_sigreturn(CPUState *env)
|
1892 |
{ |
1893 |
abi_ulong sf_addr; |
1894 |
struct target_signal_frame *sf;
|
1895 |
uint32_t up_psr, pc, npc; |
1896 |
target_sigset_t set; |
1897 |
sigset_t host_set; |
1898 |
abi_ulong fpu_save_addr; |
1899 |
int err, i;
|
1900 |
|
1901 |
sf_addr = env->regwptr[UREG_FP]; |
1902 |
if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1)) |
1903 |
goto segv_and_exit;
|
1904 |
#if 0
|
1905 |
fprintf(stderr, "sigreturn\n");
|
1906 |
fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
|
1907 |
#endif
|
1908 |
//cpu_dump_state(env, stderr, fprintf, 0);
|
1909 |
|
1910 |
/* 1. Make sure we are not getting garbage from the user */
|
1911 |
|
1912 |
if (sf_addr & 3) |
1913 |
goto segv_and_exit;
|
1914 |
|
1915 |
err = __get_user(pc, &sf->info.si_regs.pc); |
1916 |
err |= __get_user(npc, &sf->info.si_regs.npc); |
1917 |
|
1918 |
if ((pc | npc) & 3) |
1919 |
goto segv_and_exit;
|
1920 |
|
1921 |
/* 2. Restore the state */
|
1922 |
err |= __get_user(up_psr, &sf->info.si_regs.psr); |
1923 |
|
1924 |
/* User can only change condition codes and FPU enabling in %psr. */
|
1925 |
env->psr = (up_psr & (PSR_ICC /* | PSR_EF */))
|
1926 |
| (env->psr & ~(PSR_ICC /* | PSR_EF */));
|
1927 |
|
1928 |
env->pc = pc; |
1929 |
env->npc = npc; |
1930 |
err |= __get_user(env->y, &sf->info.si_regs.y); |
1931 |
for (i=0; i < 8; i++) { |
1932 |
err |= __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]); |
1933 |
} |
1934 |
for (i=0; i < 8; i++) { |
1935 |
err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]);
|
1936 |
} |
1937 |
|
1938 |
err |= __get_user(fpu_save_addr, &sf->fpu_save); |
1939 |
|
1940 |
//if (fpu_save)
|
1941 |
// err |= restore_fpu_state(env, fpu_save);
|
1942 |
|
1943 |
/* This is pretty much atomic, no amount locking would prevent
|
1944 |
* the races which exist anyways.
|
1945 |
*/
|
1946 |
err |= __get_user(set.sig[0], &sf->info.si_mask);
|
1947 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
1948 |
err |= (__get_user(set.sig[i], &sf->extramask[i - 1]));
|
1949 |
} |
1950 |
|
1951 |
target_to_host_sigset_internal(&host_set, &set); |
1952 |
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
1953 |
|
1954 |
if (err)
|
1955 |
goto segv_and_exit;
|
1956 |
unlock_user_struct(sf, sf_addr, 0);
|
1957 |
return env->regwptr[0]; |
1958 |
|
1959 |
segv_and_exit:
|
1960 |
unlock_user_struct(sf, sf_addr, 0);
|
1961 |
force_sig(TARGET_SIGSEGV); |
1962 |
} |
1963 |
|
1964 |
long do_rt_sigreturn(CPUState *env)
|
1965 |
{ |
1966 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
1967 |
return -TARGET_ENOSYS;
|
1968 |
} |
1969 |
|
1970 |
#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
|
1971 |
#define MC_TSTATE 0 |
1972 |
#define MC_PC 1 |
1973 |
#define MC_NPC 2 |
1974 |
#define MC_Y 3 |
1975 |
#define MC_G1 4 |
1976 |
#define MC_G2 5 |
1977 |
#define MC_G3 6 |
1978 |
#define MC_G4 7 |
1979 |
#define MC_G5 8 |
1980 |
#define MC_G6 9 |
1981 |
#define MC_G7 10 |
1982 |
#define MC_O0 11 |
1983 |
#define MC_O1 12 |
1984 |
#define MC_O2 13 |
1985 |
#define MC_O3 14 |
1986 |
#define MC_O4 15 |
1987 |
#define MC_O5 16 |
1988 |
#define MC_O6 17 |
1989 |
#define MC_O7 18 |
1990 |
#define MC_NGREG 19 |
1991 |
|
1992 |
typedef abi_ulong target_mc_greg_t;
|
1993 |
typedef target_mc_greg_t target_mc_gregset_t[MC_NGREG];
|
1994 |
|
1995 |
struct target_mc_fq {
|
1996 |
abi_ulong *mcfq_addr; |
1997 |
uint32_t mcfq_insn; |
1998 |
}; |
1999 |
|
2000 |
struct target_mc_fpu {
|
2001 |
union {
|
2002 |
uint32_t sregs[32];
|
2003 |
uint64_t dregs[32];
|
2004 |
//uint128_t qregs[16];
|
2005 |
} mcfpu_fregs; |
2006 |
abi_ulong mcfpu_fsr; |
2007 |
abi_ulong mcfpu_fprs; |
2008 |
abi_ulong mcfpu_gsr; |
2009 |
struct target_mc_fq *mcfpu_fq;
|
2010 |
unsigned char mcfpu_qcnt; |
2011 |
unsigned char mcfpu_qentsz; |
2012 |
unsigned char mcfpu_enab; |
2013 |
}; |
2014 |
typedef struct target_mc_fpu target_mc_fpu_t; |
2015 |
|
2016 |
typedef struct { |
2017 |
target_mc_gregset_t mc_gregs; |
2018 |
target_mc_greg_t mc_fp; |
2019 |
target_mc_greg_t mc_i7; |
2020 |
target_mc_fpu_t mc_fpregs; |
2021 |
} target_mcontext_t; |
2022 |
|
2023 |
struct target_ucontext {
|
2024 |
struct target_ucontext *uc_link;
|
2025 |
abi_ulong uc_flags; |
2026 |
target_sigset_t uc_sigmask; |
2027 |
target_mcontext_t uc_mcontext; |
2028 |
}; |
2029 |
|
2030 |
/* A V9 register window */
|
2031 |
struct target_reg_window {
|
2032 |
abi_ulong locals[8];
|
2033 |
abi_ulong ins[8];
|
2034 |
}; |
2035 |
|
2036 |
#define TARGET_STACK_BIAS 2047 |
2037 |
|
2038 |
/* {set, get}context() needed for 64-bit SparcLinux userland. */
|
2039 |
void sparc64_set_context(CPUSPARCState *env)
|
2040 |
{ |
2041 |
abi_ulong ucp_addr; |
2042 |
struct target_ucontext *ucp;
|
2043 |
target_mc_gregset_t *grp; |
2044 |
abi_ulong pc, npc, tstate; |
2045 |
abi_ulong fp, i7, w_addr; |
2046 |
unsigned char fenab; |
2047 |
int err;
|
2048 |
unsigned int i; |
2049 |
|
2050 |
ucp_addr = env->regwptr[UREG_I0]; |
2051 |
if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1)) |
2052 |
goto do_sigsegv;
|
2053 |
grp = &ucp->uc_mcontext.mc_gregs; |
2054 |
err = __get_user(pc, &((*grp)[MC_PC])); |
2055 |
err |= __get_user(npc, &((*grp)[MC_NPC])); |
2056 |
if (err || ((pc | npc) & 3)) |
2057 |
goto do_sigsegv;
|
2058 |
if (env->regwptr[UREG_I1]) {
|
2059 |
target_sigset_t target_set; |
2060 |
sigset_t set; |
2061 |
|
2062 |
if (TARGET_NSIG_WORDS == 1) { |
2063 |
if (__get_user(target_set.sig[0], &ucp->uc_sigmask.sig[0])) |
2064 |
goto do_sigsegv;
|
2065 |
} else {
|
2066 |
abi_ulong *src, *dst; |
2067 |
src = ucp->uc_sigmask.sig; |
2068 |
dst = target_set.sig; |
2069 |
for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong); |
2070 |
i++, dst++, src++) |
2071 |
err |= __get_user(*dst, src); |
2072 |
if (err)
|
2073 |
goto do_sigsegv;
|
2074 |
} |
2075 |
target_to_host_sigset_internal(&set, &target_set); |
2076 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
2077 |
} |
2078 |
env->pc = pc; |
2079 |
env->npc = npc; |
2080 |
err |= __get_user(env->y, &((*grp)[MC_Y])); |
2081 |
err |= __get_user(tstate, &((*grp)[MC_TSTATE])); |
2082 |
env->asi = (tstate >> 24) & 0xff; |
2083 |
PUT_CCR(env, tstate >> 32);
|
2084 |
PUT_CWP64(env, tstate & 0x1f);
|
2085 |
err |= __get_user(env->gregs[1], (&(*grp)[MC_G1]));
|
2086 |
err |= __get_user(env->gregs[2], (&(*grp)[MC_G2]));
|
2087 |
err |= __get_user(env->gregs[3], (&(*grp)[MC_G3]));
|
2088 |
err |= __get_user(env->gregs[4], (&(*grp)[MC_G4]));
|
2089 |
err |= __get_user(env->gregs[5], (&(*grp)[MC_G5]));
|
2090 |
err |= __get_user(env->gregs[6], (&(*grp)[MC_G6]));
|
2091 |
err |= __get_user(env->gregs[7], (&(*grp)[MC_G7]));
|
2092 |
err |= __get_user(env->regwptr[UREG_I0], (&(*grp)[MC_O0])); |
2093 |
err |= __get_user(env->regwptr[UREG_I1], (&(*grp)[MC_O1])); |
2094 |
err |= __get_user(env->regwptr[UREG_I2], (&(*grp)[MC_O2])); |
2095 |
err |= __get_user(env->regwptr[UREG_I3], (&(*grp)[MC_O3])); |
2096 |
err |= __get_user(env->regwptr[UREG_I4], (&(*grp)[MC_O4])); |
2097 |
err |= __get_user(env->regwptr[UREG_I5], (&(*grp)[MC_O5])); |
2098 |
err |= __get_user(env->regwptr[UREG_I6], (&(*grp)[MC_O6])); |
2099 |
err |= __get_user(env->regwptr[UREG_I7], (&(*grp)[MC_O7])); |
2100 |
|
2101 |
err |= __get_user(fp, &(ucp->uc_mcontext.mc_fp)); |
2102 |
err |= __get_user(i7, &(ucp->uc_mcontext.mc_i7)); |
2103 |
|
2104 |
w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6]; |
2105 |
if (put_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]), |
2106 |
abi_ulong) != 0)
|
2107 |
goto do_sigsegv;
|
2108 |
if (put_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]), |
2109 |
abi_ulong) != 0)
|
2110 |
goto do_sigsegv;
|
2111 |
err |= __get_user(fenab, &(ucp->uc_mcontext.mc_fpregs.mcfpu_enab)); |
2112 |
err |= __get_user(env->fprs, &(ucp->uc_mcontext.mc_fpregs.mcfpu_fprs)); |
2113 |
{ |
2114 |
uint32_t *src, *dst; |
2115 |
src = ucp->uc_mcontext.mc_fpregs.mcfpu_fregs.sregs; |
2116 |
dst = env->fpr; |
2117 |
/* XXX: check that the CPU storage is the same as user context */
|
2118 |
for (i = 0; i < 64; i++, dst++, src++) |
2119 |
err |= __get_user(*dst, src); |
2120 |
} |
2121 |
err |= __get_user(env->fsr, |
2122 |
&(ucp->uc_mcontext.mc_fpregs.mcfpu_fsr)); |
2123 |
err |= __get_user(env->gsr, |
2124 |
&(ucp->uc_mcontext.mc_fpregs.mcfpu_gsr)); |
2125 |
if (err)
|
2126 |
goto do_sigsegv;
|
2127 |
unlock_user_struct(ucp, ucp_addr, 0);
|
2128 |
return;
|
2129 |
do_sigsegv:
|
2130 |
unlock_user_struct(ucp, ucp_addr, 0);
|
2131 |
force_sig(SIGSEGV); |
2132 |
} |
2133 |
|
2134 |
void sparc64_get_context(CPUSPARCState *env)
|
2135 |
{ |
2136 |
abi_ulong ucp_addr; |
2137 |
struct target_ucontext *ucp;
|
2138 |
target_mc_gregset_t *grp; |
2139 |
target_mcontext_t *mcp; |
2140 |
abi_ulong fp, i7, w_addr; |
2141 |
int err;
|
2142 |
unsigned int i; |
2143 |
target_sigset_t target_set; |
2144 |
sigset_t set; |
2145 |
|
2146 |
ucp_addr = env->regwptr[UREG_I0]; |
2147 |
if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0)) |
2148 |
goto do_sigsegv;
|
2149 |
|
2150 |
mcp = &ucp->uc_mcontext; |
2151 |
grp = &mcp->mc_gregs; |
2152 |
|
2153 |
/* Skip over the trap instruction, first. */
|
2154 |
env->pc = env->npc; |
2155 |
env->npc += 4;
|
2156 |
|
2157 |
err = 0;
|
2158 |
|
2159 |
sigprocmask(0, NULL, &set); |
2160 |
host_to_target_sigset_internal(&target_set, &set); |
2161 |
if (TARGET_NSIG_WORDS == 1) { |
2162 |
err |= __put_user(target_set.sig[0],
|
2163 |
(abi_ulong *)&ucp->uc_sigmask); |
2164 |
} else {
|
2165 |
abi_ulong *src, *dst; |
2166 |
src = target_set.sig; |
2167 |
dst = ucp->uc_sigmask.sig; |
2168 |
for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong); |
2169 |
i++, dst++, src++) |
2170 |
err |= __put_user(*src, dst); |
2171 |
if (err)
|
2172 |
goto do_sigsegv;
|
2173 |
} |
2174 |
|
2175 |
/* XXX: tstate must be saved properly */
|
2176 |
// err |= __put_user(env->tstate, &((*grp)[MC_TSTATE]));
|
2177 |
err |= __put_user(env->pc, &((*grp)[MC_PC])); |
2178 |
err |= __put_user(env->npc, &((*grp)[MC_NPC])); |
2179 |
err |= __put_user(env->y, &((*grp)[MC_Y])); |
2180 |
err |= __put_user(env->gregs[1], &((*grp)[MC_G1]));
|
2181 |
err |= __put_user(env->gregs[2], &((*grp)[MC_G2]));
|
2182 |
err |= __put_user(env->gregs[3], &((*grp)[MC_G3]));
|
2183 |
err |= __put_user(env->gregs[4], &((*grp)[MC_G4]));
|
2184 |
err |= __put_user(env->gregs[5], &((*grp)[MC_G5]));
|
2185 |
err |= __put_user(env->gregs[6], &((*grp)[MC_G6]));
|
2186 |
err |= __put_user(env->gregs[7], &((*grp)[MC_G7]));
|
2187 |
err |= __put_user(env->regwptr[UREG_I0], &((*grp)[MC_O0])); |
2188 |
err |= __put_user(env->regwptr[UREG_I1], &((*grp)[MC_O1])); |
2189 |
err |= __put_user(env->regwptr[UREG_I2], &((*grp)[MC_O2])); |
2190 |
err |= __put_user(env->regwptr[UREG_I3], &((*grp)[MC_O3])); |
2191 |
err |= __put_user(env->regwptr[UREG_I4], &((*grp)[MC_O4])); |
2192 |
err |= __put_user(env->regwptr[UREG_I5], &((*grp)[MC_O5])); |
2193 |
err |= __put_user(env->regwptr[UREG_I6], &((*grp)[MC_O6])); |
2194 |
err |= __put_user(env->regwptr[UREG_I7], &((*grp)[MC_O7])); |
2195 |
|
2196 |
w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6]; |
2197 |
fp = i7 = 0;
|
2198 |
if (get_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]), |
2199 |
abi_ulong) != 0)
|
2200 |
goto do_sigsegv;
|
2201 |
if (get_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]), |
2202 |
abi_ulong) != 0)
|
2203 |
goto do_sigsegv;
|
2204 |
err |= __put_user(fp, &(mcp->mc_fp)); |
2205 |
err |= __put_user(i7, &(mcp->mc_i7)); |
2206 |
|
2207 |
{ |
2208 |
uint32_t *src, *dst; |
2209 |
src = env->fpr; |
2210 |
dst = ucp->uc_mcontext.mc_fpregs.mcfpu_fregs.sregs; |
2211 |
/* XXX: check that the CPU storage is the same as user context */
|
2212 |
for (i = 0; i < 64; i++, dst++, src++) |
2213 |
err |= __put_user(*src, dst); |
2214 |
} |
2215 |
err |= __put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr)); |
2216 |
err |= __put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr)); |
2217 |
err |= __put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs)); |
2218 |
|
2219 |
if (err)
|
2220 |
goto do_sigsegv;
|
2221 |
unlock_user_struct(ucp, ucp_addr, 1);
|
2222 |
return;
|
2223 |
do_sigsegv:
|
2224 |
unlock_user_struct(ucp, ucp_addr, 1);
|
2225 |
force_sig(SIGSEGV); |
2226 |
} |
2227 |
#endif
|
2228 |
#elif defined(TARGET_ABI_MIPSN64)
|
2229 |
|
2230 |
# warning signal handling not implemented
|
2231 |
|
2232 |
static void setup_frame(int sig, struct target_sigaction *ka, |
2233 |
target_sigset_t *set, CPUState *env) |
2234 |
{ |
2235 |
fprintf(stderr, "setup_frame: not implemented\n");
|
2236 |
} |
2237 |
|
2238 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
2239 |
target_siginfo_t *info, |
2240 |
target_sigset_t *set, CPUState *env) |
2241 |
{ |
2242 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
2243 |
} |
2244 |
|
2245 |
long do_sigreturn(CPUState *env)
|
2246 |
{ |
2247 |
fprintf(stderr, "do_sigreturn: not implemented\n");
|
2248 |
return -TARGET_ENOSYS;
|
2249 |
} |
2250 |
|
2251 |
long do_rt_sigreturn(CPUState *env)
|
2252 |
{ |
2253 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
2254 |
return -TARGET_ENOSYS;
|
2255 |
} |
2256 |
|
2257 |
#elif defined(TARGET_ABI_MIPSN32)
|
2258 |
|
2259 |
# warning signal handling not implemented
|
2260 |
|
2261 |
static void setup_frame(int sig, struct target_sigaction *ka, |
2262 |
target_sigset_t *set, CPUState *env) |
2263 |
{ |
2264 |
fprintf(stderr, "setup_frame: not implemented\n");
|
2265 |
} |
2266 |
|
2267 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
2268 |
target_siginfo_t *info, |
2269 |
target_sigset_t *set, CPUState *env) |
2270 |
{ |
2271 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
2272 |
} |
2273 |
|
2274 |
long do_sigreturn(CPUState *env)
|
2275 |
{ |
2276 |
fprintf(stderr, "do_sigreturn: not implemented\n");
|
2277 |
return -TARGET_ENOSYS;
|
2278 |
} |
2279 |
|
2280 |
long do_rt_sigreturn(CPUState *env)
|
2281 |
{ |
2282 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
2283 |
return -TARGET_ENOSYS;
|
2284 |
} |
2285 |
|
2286 |
#elif defined(TARGET_ABI_MIPSO32)
|
2287 |
|
2288 |
struct target_sigcontext {
|
2289 |
uint32_t sc_regmask; /* Unused */
|
2290 |
uint32_t sc_status; |
2291 |
uint64_t sc_pc; |
2292 |
uint64_t sc_regs[32];
|
2293 |
uint64_t sc_fpregs[32];
|
2294 |
uint32_t sc_ownedfp; /* Unused */
|
2295 |
uint32_t sc_fpc_csr; |
2296 |
uint32_t sc_fpc_eir; /* Unused */
|
2297 |
uint32_t sc_used_math; |
2298 |
uint32_t sc_dsp; /* dsp status, was sc_ssflags */
|
2299 |
uint64_t sc_mdhi; |
2300 |
uint64_t sc_mdlo; |
2301 |
target_ulong sc_hi1; /* Was sc_cause */
|
2302 |
target_ulong sc_lo1; /* Was sc_badvaddr */
|
2303 |
target_ulong sc_hi2; /* Was sc_sigset[4] */
|
2304 |
target_ulong sc_lo2; |
2305 |
target_ulong sc_hi3; |
2306 |
target_ulong sc_lo3; |
2307 |
}; |
2308 |
|
2309 |
struct sigframe {
|
2310 |
uint32_t sf_ass[4]; /* argument save space for o32 */ |
2311 |
uint32_t sf_code[2]; /* signal trampoline */ |
2312 |
struct target_sigcontext sf_sc;
|
2313 |
target_sigset_t sf_mask; |
2314 |
}; |
2315 |
|
2316 |
struct target_ucontext {
|
2317 |
target_ulong uc_flags; |
2318 |
target_ulong uc_link; |
2319 |
target_stack_t uc_stack; |
2320 |
struct target_sigcontext uc_mcontext;
|
2321 |
target_sigset_t uc_sigmask; |
2322 |
}; |
2323 |
|
2324 |
struct target_rt_sigframe {
|
2325 |
uint32_t rs_ass[4]; /* argument save space for o32 */ |
2326 |
uint32_t rs_code[2]; /* signal trampoline */ |
2327 |
struct target_siginfo rs_info;
|
2328 |
struct target_ucontext rs_uc;
|
2329 |
}; |
2330 |
|
2331 |
/* Install trampoline to jump back from signal handler */
|
2332 |
static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall) |
2333 |
{ |
2334 |
int err;
|
2335 |
|
2336 |
/*
|
2337 |
* Set up the return code ...
|
2338 |
*
|
2339 |
* li v0, __NR__foo_sigreturn
|
2340 |
* syscall
|
2341 |
*/
|
2342 |
|
2343 |
err = __put_user(0x24020000 + syscall, tramp + 0); |
2344 |
err |= __put_user(0x0000000c , tramp + 1); |
2345 |
/* flush_cache_sigtramp((unsigned long) tramp); */
|
2346 |
return err;
|
2347 |
} |
2348 |
|
2349 |
static inline int |
2350 |
setup_sigcontext(CPUState *regs, struct target_sigcontext *sc)
|
2351 |
{ |
2352 |
int err = 0; |
2353 |
|
2354 |
err |= __put_user(regs->active_tc.PC, &sc->sc_pc); |
2355 |
|
2356 |
#define save_gp_reg(i) do { \ |
2357 |
err |= __put_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \ |
2358 |
} while(0) |
2359 |
__put_user(0, &sc->sc_regs[0]); save_gp_reg(1); save_gp_reg(2); |
2360 |
save_gp_reg(3); save_gp_reg(4); save_gp_reg(5); save_gp_reg(6); |
2361 |
save_gp_reg(7); save_gp_reg(8); save_gp_reg(9); save_gp_reg(10); |
2362 |
save_gp_reg(11); save_gp_reg(12); save_gp_reg(13); save_gp_reg(14); |
2363 |
save_gp_reg(15); save_gp_reg(16); save_gp_reg(17); save_gp_reg(18); |
2364 |
save_gp_reg(19); save_gp_reg(20); save_gp_reg(21); save_gp_reg(22); |
2365 |
save_gp_reg(23); save_gp_reg(24); save_gp_reg(25); save_gp_reg(26); |
2366 |
save_gp_reg(27); save_gp_reg(28); save_gp_reg(29); save_gp_reg(30); |
2367 |
save_gp_reg(31);
|
2368 |
#undef save_gp_reg
|
2369 |
|
2370 |
err |= __put_user(regs->active_tc.HI[0], &sc->sc_mdhi);
|
2371 |
err |= __put_user(regs->active_tc.LO[0], &sc->sc_mdlo);
|
2372 |
|
2373 |
/* Not used yet, but might be useful if we ever have DSP suppport */
|
2374 |
#if 0
|
2375 |
if (cpu_has_dsp) {
|
2376 |
err |= __put_user(mfhi1(), &sc->sc_hi1);
|
2377 |
err |= __put_user(mflo1(), &sc->sc_lo1);
|
2378 |
err |= __put_user(mfhi2(), &sc->sc_hi2);
|
2379 |
err |= __put_user(mflo2(), &sc->sc_lo2);
|
2380 |
err |= __put_user(mfhi3(), &sc->sc_hi3);
|
2381 |
err |= __put_user(mflo3(), &sc->sc_lo3);
|
2382 |
err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
|
2383 |
}
|
2384 |
/* same with 64 bit */
|
2385 |
#ifdef CONFIG_64BIT
|
2386 |
err |= __put_user(regs->hi, &sc->sc_hi[0]);
|
2387 |
err |= __put_user(regs->lo, &sc->sc_lo[0]);
|
2388 |
if (cpu_has_dsp) {
|
2389 |
err |= __put_user(mfhi1(), &sc->sc_hi[1]);
|
2390 |
err |= __put_user(mflo1(), &sc->sc_lo[1]);
|
2391 |
err |= __put_user(mfhi2(), &sc->sc_hi[2]);
|
2392 |
err |= __put_user(mflo2(), &sc->sc_lo[2]);
|
2393 |
err |= __put_user(mfhi3(), &sc->sc_hi[3]);
|
2394 |
err |= __put_user(mflo3(), &sc->sc_lo[3]);
|
2395 |
err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
|
2396 |
}
|
2397 |
#endif
|
2398 |
#endif
|
2399 |
|
2400 |
#if 0
|
2401 |
err |= __put_user(!!used_math(), &sc->sc_used_math);
|
2402 |
|
2403 |
if (!used_math())
|
2404 |
goto out;
|
2405 |
|
2406 |
/*
|
2407 |
* Save FPU state to signal context. Signal handler will "inherit"
|
2408 |
* current FPU state.
|
2409 |
*/
|
2410 |
preempt_disable();
|
2411 |
|
2412 |
if (!is_fpu_owner()) {
|
2413 |
own_fpu();
|
2414 |
restore_fp(current);
|
2415 |
}
|
2416 |
err |= save_fp_context(sc);
|
2417 |
|
2418 |
preempt_enable();
|
2419 |
out:
|
2420 |
#endif
|
2421 |
return err;
|
2422 |
} |
2423 |
|
2424 |
static inline int |
2425 |
restore_sigcontext(CPUState *regs, struct target_sigcontext *sc)
|
2426 |
{ |
2427 |
int err = 0; |
2428 |
|
2429 |
err |= __get_user(regs->CP0_EPC, &sc->sc_pc); |
2430 |
|
2431 |
err |= __get_user(regs->active_tc.HI[0], &sc->sc_mdhi);
|
2432 |
err |= __get_user(regs->active_tc.LO[0], &sc->sc_mdlo);
|
2433 |
|
2434 |
#define restore_gp_reg(i) do { \ |
2435 |
err |= __get_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \ |
2436 |
} while(0) |
2437 |
restore_gp_reg( 1); restore_gp_reg( 2); restore_gp_reg( 3); |
2438 |
restore_gp_reg( 4); restore_gp_reg( 5); restore_gp_reg( 6); |
2439 |
restore_gp_reg( 7); restore_gp_reg( 8); restore_gp_reg( 9); |
2440 |
restore_gp_reg(10); restore_gp_reg(11); restore_gp_reg(12); |
2441 |
restore_gp_reg(13); restore_gp_reg(14); restore_gp_reg(15); |
2442 |
restore_gp_reg(16); restore_gp_reg(17); restore_gp_reg(18); |
2443 |
restore_gp_reg(19); restore_gp_reg(20); restore_gp_reg(21); |
2444 |
restore_gp_reg(22); restore_gp_reg(23); restore_gp_reg(24); |
2445 |
restore_gp_reg(25); restore_gp_reg(26); restore_gp_reg(27); |
2446 |
restore_gp_reg(28); restore_gp_reg(29); restore_gp_reg(30); |
2447 |
restore_gp_reg(31);
|
2448 |
#undef restore_gp_reg
|
2449 |
|
2450 |
#if 0
|
2451 |
if (cpu_has_dsp) {
|
2452 |
err |= __get_user(treg, &sc->sc_hi1); mthi1(treg);
|
2453 |
err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg);
|
2454 |
err |= __get_user(treg, &sc->sc_hi2); mthi2(treg);
|
2455 |
err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg);
|
2456 |
err |= __get_user(treg, &sc->sc_hi3); mthi3(treg);
|
2457 |
err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg);
|
2458 |
err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
|
2459 |
}
|
2460 |
#ifdef CONFIG_64BIT
|
2461 |
err |= __get_user(regs->hi, &sc->sc_hi[0]);
|
2462 |
err |= __get_user(regs->lo, &sc->sc_lo[0]);
|
2463 |
if (cpu_has_dsp) {
|
2464 |
err |= __get_user(treg, &sc->sc_hi[1]); mthi1(treg);
|
2465 |
err |= __get_user(treg, &sc->sc_lo[1]); mthi1(treg);
|
2466 |
err |= __get_user(treg, &sc->sc_hi[2]); mthi2(treg);
|
2467 |
err |= __get_user(treg, &sc->sc_lo[2]); mthi2(treg);
|
2468 |
err |= __get_user(treg, &sc->sc_hi[3]); mthi3(treg);
|
2469 |
err |= __get_user(treg, &sc->sc_lo[3]); mthi3(treg);
|
2470 |
err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
|
2471 |
}
|
2472 |
#endif
|
2473 |
|
2474 |
err |= __get_user(used_math, &sc->sc_used_math); |
2475 |
conditional_used_math(used_math); |
2476 |
|
2477 |
preempt_disable(); |
2478 |
|
2479 |
if (used_math()) {
|
2480 |
/* restore fpu context if we have used it before */
|
2481 |
own_fpu(); |
2482 |
err |= restore_fp_context(sc); |
2483 |
} else {
|
2484 |
/* signal handler may have used FPU. Give it up. */
|
2485 |
lose_fpu(); |
2486 |
} |
2487 |
|
2488 |
preempt_enable(); |
2489 |
#endif
|
2490 |
return err;
|
2491 |
} |
2492 |
/*
|
2493 |
* Determine which stack to use..
|
2494 |
*/
|
2495 |
static inline abi_ulong |
2496 |
get_sigframe(struct target_sigaction *ka, CPUState *regs, size_t frame_size)
|
2497 |
{ |
2498 |
unsigned long sp; |
2499 |
|
2500 |
/* Default to using normal stack */
|
2501 |
sp = regs->active_tc.gpr[29];
|
2502 |
|
2503 |
/*
|
2504 |
* FPU emulator may have it's own trampoline active just
|
2505 |
* above the user stack, 16-bytes before the next lowest
|
2506 |
* 16 byte boundary. Try to avoid trashing it.
|
2507 |
*/
|
2508 |
sp -= 32;
|
2509 |
|
2510 |
/* This is the X/Open sanctioned signal stack switching. */
|
2511 |
if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) { |
2512 |
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
2513 |
} |
2514 |
|
2515 |
return (sp - frame_size) & ~7; |
2516 |
} |
2517 |
|
2518 |
/* compare linux/arch/mips/kernel/signal.c:setup_frame() */
|
2519 |
static void setup_frame(int sig, struct target_sigaction * ka, |
2520 |
target_sigset_t *set, CPUState *regs) |
2521 |
{ |
2522 |
struct sigframe *frame;
|
2523 |
abi_ulong frame_addr; |
2524 |
int i;
|
2525 |
|
2526 |
frame_addr = get_sigframe(ka, regs, sizeof(*frame));
|
2527 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
2528 |
goto give_sigsegv;
|
2529 |
|
2530 |
install_sigtramp(frame->sf_code, TARGET_NR_sigreturn); |
2531 |
|
2532 |
if(setup_sigcontext(regs, &frame->sf_sc))
|
2533 |
goto give_sigsegv;
|
2534 |
|
2535 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
2536 |
if(__put_user(set->sig[i], &frame->sf_mask.sig[i]))
|
2537 |
goto give_sigsegv;
|
2538 |
} |
2539 |
|
2540 |
/*
|
2541 |
* Arguments to signal handler:
|
2542 |
*
|
2543 |
* a0 = signal number
|
2544 |
* a1 = 0 (should be cause)
|
2545 |
* a2 = pointer to struct sigcontext
|
2546 |
*
|
2547 |
* $25 and PC point to the signal handler, $29 points to the
|
2548 |
* struct sigframe.
|
2549 |
*/
|
2550 |
regs->active_tc.gpr[ 4] = sig;
|
2551 |
regs->active_tc.gpr[ 5] = 0; |
2552 |
regs->active_tc.gpr[ 6] = frame_addr + offsetof(struct sigframe, sf_sc); |
2553 |
regs->active_tc.gpr[29] = frame_addr;
|
2554 |
regs->active_tc.gpr[31] = frame_addr + offsetof(struct sigframe, sf_code); |
2555 |
/* The original kernel code sets CP0_EPC to the handler
|
2556 |
* since it returns to userland using eret
|
2557 |
* we cannot do this here, and we must set PC directly */
|
2558 |
regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler;
|
2559 |
unlock_user_struct(frame, frame_addr, 1);
|
2560 |
return;
|
2561 |
|
2562 |
give_sigsegv:
|
2563 |
unlock_user_struct(frame, frame_addr, 1);
|
2564 |
force_sig(TARGET_SIGSEGV/*, current*/);
|
2565 |
return;
|
2566 |
} |
2567 |
|
2568 |
long do_sigreturn(CPUState *regs)
|
2569 |
{ |
2570 |
struct sigframe *frame;
|
2571 |
abi_ulong frame_addr; |
2572 |
sigset_t blocked; |
2573 |
target_sigset_t target_set; |
2574 |
int i;
|
2575 |
|
2576 |
#if defined(DEBUG_SIGNAL)
|
2577 |
fprintf(stderr, "do_sigreturn\n");
|
2578 |
#endif
|
2579 |
frame_addr = regs->active_tc.gpr[29];
|
2580 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
2581 |
goto badframe;
|
2582 |
|
2583 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
2584 |
if(__get_user(target_set.sig[i], &frame->sf_mask.sig[i]))
|
2585 |
goto badframe;
|
2586 |
} |
2587 |
|
2588 |
target_to_host_sigset_internal(&blocked, &target_set); |
2589 |
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
2590 |
|
2591 |
if (restore_sigcontext(regs, &frame->sf_sc))
|
2592 |
goto badframe;
|
2593 |
|
2594 |
#if 0
|
2595 |
/*
|
2596 |
* Don't let your children do this ...
|
2597 |
*/
|
2598 |
__asm__ __volatile__(
|
2599 |
"move\t$29, %0\n\t"
|
2600 |
"j\tsyscall_exit"
|
2601 |
:/* no outputs */
|
2602 |
:"r" (®s));
|
2603 |
/* Unreached */
|
2604 |
#endif
|
2605 |
|
2606 |
regs->active_tc.PC = regs->CP0_EPC; |
2607 |
/* I am not sure this is right, but it seems to work
|
2608 |
* maybe a problem with nested signals ? */
|
2609 |
regs->CP0_EPC = 0;
|
2610 |
return -TARGET_QEMU_ESIGRETURN;
|
2611 |
|
2612 |
badframe:
|
2613 |
force_sig(TARGET_SIGSEGV/*, current*/);
|
2614 |
return 0; |
2615 |
} |
2616 |
|
2617 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
2618 |
target_siginfo_t *info, |
2619 |
target_sigset_t *set, CPUState *env) |
2620 |
{ |
2621 |
struct target_rt_sigframe *frame;
|
2622 |
abi_ulong frame_addr; |
2623 |
int i;
|
2624 |
|
2625 |
frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
2626 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
2627 |
goto give_sigsegv;
|
2628 |
|
2629 |
install_sigtramp(frame->rs_code, TARGET_NR_rt_sigreturn); |
2630 |
|
2631 |
copy_siginfo_to_user(&frame->rs_info, info); |
2632 |
|
2633 |
__put_user(0, &frame->rs_uc.uc_flags);
|
2634 |
__put_user(0, &frame->rs_uc.uc_link);
|
2635 |
__put_user(target_sigaltstack_used.ss_sp, &frame->rs_uc.uc_stack.ss_sp); |
2636 |
__put_user(target_sigaltstack_used.ss_size, &frame->rs_uc.uc_stack.ss_size); |
2637 |
__put_user(sas_ss_flags(get_sp_from_cpustate(env)), |
2638 |
&frame->rs_uc.uc_stack.ss_flags); |
2639 |
|
2640 |
setup_sigcontext(env, &frame->rs_uc.uc_mcontext); |
2641 |
|
2642 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
2643 |
__put_user(set->sig[i], &frame->rs_uc.uc_sigmask.sig[i]); |
2644 |
} |
2645 |
|
2646 |
/*
|
2647 |
* Arguments to signal handler:
|
2648 |
*
|
2649 |
* a0 = signal number
|
2650 |
* a1 = pointer to struct siginfo
|
2651 |
* a2 = pointer to struct ucontext
|
2652 |
*
|
2653 |
* $25 and PC point to the signal handler, $29 points to the
|
2654 |
* struct sigframe.
|
2655 |
*/
|
2656 |
env->active_tc.gpr[ 4] = sig;
|
2657 |
env->active_tc.gpr[ 5] = frame_addr
|
2658 |
+ offsetof(struct target_rt_sigframe, rs_info);
|
2659 |
env->active_tc.gpr[ 6] = frame_addr
|
2660 |
+ offsetof(struct target_rt_sigframe, rs_uc);
|
2661 |
env->active_tc.gpr[29] = frame_addr;
|
2662 |
env->active_tc.gpr[31] = frame_addr
|
2663 |
+ offsetof(struct target_rt_sigframe, rs_code);
|
2664 |
/* The original kernel code sets CP0_EPC to the handler
|
2665 |
* since it returns to userland using eret
|
2666 |
* we cannot do this here, and we must set PC directly */
|
2667 |
env->active_tc.PC = env->active_tc.gpr[25] = ka->_sa_handler;
|
2668 |
unlock_user_struct(frame, frame_addr, 1);
|
2669 |
return;
|
2670 |
|
2671 |
give_sigsegv:
|
2672 |
unlock_user_struct(frame, frame_addr, 1);
|
2673 |
force_sig(TARGET_SIGSEGV/*, current*/);
|
2674 |
return;
|
2675 |
} |
2676 |
|
2677 |
long do_rt_sigreturn(CPUState *env)
|
2678 |
{ |
2679 |
struct target_rt_sigframe *frame;
|
2680 |
abi_ulong frame_addr; |
2681 |
sigset_t blocked; |
2682 |
|
2683 |
#if defined(DEBUG_SIGNAL)
|
2684 |
fprintf(stderr, "do_rt_sigreturn\n");
|
2685 |
#endif
|
2686 |
frame_addr = env->active_tc.gpr[29];
|
2687 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
2688 |
goto badframe;
|
2689 |
|
2690 |
target_to_host_sigset(&blocked, &frame->rs_uc.uc_sigmask); |
2691 |
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
2692 |
|
2693 |
if (restore_sigcontext(env, &frame->rs_uc.uc_mcontext))
|
2694 |
goto badframe;
|
2695 |
|
2696 |
if (do_sigaltstack(frame_addr +
|
2697 |
offsetof(struct target_rt_sigframe, rs_uc.uc_stack),
|
2698 |
0, get_sp_from_cpustate(env)) == -EFAULT)
|
2699 |
goto badframe;
|
2700 |
|
2701 |
env->active_tc.PC = env->CP0_EPC; |
2702 |
/* I am not sure this is right, but it seems to work
|
2703 |
* maybe a problem with nested signals ? */
|
2704 |
env->CP0_EPC = 0;
|
2705 |
return -TARGET_QEMU_ESIGRETURN;
|
2706 |
|
2707 |
badframe:
|
2708 |
force_sig(TARGET_SIGSEGV/*, current*/);
|
2709 |
return 0; |
2710 |
} |
2711 |
|
2712 |
#elif defined(TARGET_SH4)
|
2713 |
|
2714 |
/*
|
2715 |
* code and data structures from linux kernel:
|
2716 |
* include/asm-sh/sigcontext.h
|
2717 |
* arch/sh/kernel/signal.c
|
2718 |
*/
|
2719 |
|
2720 |
struct target_sigcontext {
|
2721 |
target_ulong oldmask; |
2722 |
|
2723 |
/* CPU registers */
|
2724 |
target_ulong sc_gregs[16];
|
2725 |
target_ulong sc_pc; |
2726 |
target_ulong sc_pr; |
2727 |
target_ulong sc_sr; |
2728 |
target_ulong sc_gbr; |
2729 |
target_ulong sc_mach; |
2730 |
target_ulong sc_macl; |
2731 |
|
2732 |
/* FPU registers */
|
2733 |
target_ulong sc_fpregs[16];
|
2734 |
target_ulong sc_xfpregs[16];
|
2735 |
unsigned int sc_fpscr; |
2736 |
unsigned int sc_fpul; |
2737 |
unsigned int sc_ownedfp; |
2738 |
}; |
2739 |
|
2740 |
struct target_sigframe
|
2741 |
{ |
2742 |
struct target_sigcontext sc;
|
2743 |
target_ulong extramask[TARGET_NSIG_WORDS-1];
|
2744 |
uint16_t retcode[3];
|
2745 |
}; |
2746 |
|
2747 |
|
2748 |
struct target_ucontext {
|
2749 |
target_ulong uc_flags; |
2750 |
struct target_ucontext *uc_link;
|
2751 |
target_stack_t uc_stack; |
2752 |
struct target_sigcontext uc_mcontext;
|
2753 |
target_sigset_t uc_sigmask; /* mask last for extensibility */
|
2754 |
}; |
2755 |
|
2756 |
struct target_rt_sigframe
|
2757 |
{ |
2758 |
struct target_siginfo info;
|
2759 |
struct target_ucontext uc;
|
2760 |
uint16_t retcode[3];
|
2761 |
}; |
2762 |
|
2763 |
|
2764 |
#define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */ |
2765 |
#define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */ |
2766 |
|
2767 |
static abi_ulong get_sigframe(struct target_sigaction *ka, |
2768 |
unsigned long sp, size_t frame_size) |
2769 |
{ |
2770 |
if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) { |
2771 |
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
2772 |
} |
2773 |
|
2774 |
return (sp - frame_size) & -8ul; |
2775 |
} |
2776 |
|
2777 |
static int setup_sigcontext(struct target_sigcontext *sc, |
2778 |
CPUState *regs, unsigned long mask) |
2779 |
{ |
2780 |
int err = 0; |
2781 |
|
2782 |
#define COPY(x) err |= __put_user(regs->x, &sc->sc_##x) |
2783 |
COPY(gregs[0]); COPY(gregs[1]); |
2784 |
COPY(gregs[2]); COPY(gregs[3]); |
2785 |
COPY(gregs[4]); COPY(gregs[5]); |
2786 |
COPY(gregs[6]); COPY(gregs[7]); |
2787 |
COPY(gregs[8]); COPY(gregs[9]); |
2788 |
COPY(gregs[10]); COPY(gregs[11]); |
2789 |
COPY(gregs[12]); COPY(gregs[13]); |
2790 |
COPY(gregs[14]); COPY(gregs[15]); |
2791 |
COPY(gbr); COPY(mach); |
2792 |
COPY(macl); COPY(pr); |
2793 |
COPY(sr); COPY(pc); |
2794 |
#undef COPY
|
2795 |
|
2796 |
/* todo: save FPU registers here */
|
2797 |
|
2798 |
/* non-iBCS2 extensions.. */
|
2799 |
err |= __put_user(mask, &sc->oldmask); |
2800 |
|
2801 |
return err;
|
2802 |
} |
2803 |
|
2804 |
static int restore_sigcontext(CPUState *regs, |
2805 |
struct target_sigcontext *sc)
|
2806 |
{ |
2807 |
unsigned int err = 0; |
2808 |
|
2809 |
#define COPY(x) err |= __get_user(regs->x, &sc->sc_##x) |
2810 |
COPY(gregs[1]);
|
2811 |
COPY(gregs[2]); COPY(gregs[3]); |
2812 |
COPY(gregs[4]); COPY(gregs[5]); |
2813 |
COPY(gregs[6]); COPY(gregs[7]); |
2814 |
COPY(gregs[8]); COPY(gregs[9]); |
2815 |
COPY(gregs[10]); COPY(gregs[11]); |
2816 |
COPY(gregs[12]); COPY(gregs[13]); |
2817 |
COPY(gregs[14]); COPY(gregs[15]); |
2818 |
COPY(gbr); COPY(mach); |
2819 |
COPY(macl); COPY(pr); |
2820 |
COPY(sr); COPY(pc); |
2821 |
#undef COPY
|
2822 |
|
2823 |
/* todo: restore FPU registers here */
|
2824 |
|
2825 |
regs->tra = -1; /* disable syscall checks */ |
2826 |
return err;
|
2827 |
} |
2828 |
|
2829 |
static void setup_frame(int sig, struct target_sigaction *ka, |
2830 |
target_sigset_t *set, CPUState *regs) |
2831 |
{ |
2832 |
struct target_sigframe *frame;
|
2833 |
abi_ulong frame_addr; |
2834 |
int i;
|
2835 |
int err = 0; |
2836 |
int signal;
|
2837 |
|
2838 |
frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame)); |
2839 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
2840 |
goto give_sigsegv;
|
2841 |
|
2842 |
signal = current_exec_domain_sig(sig); |
2843 |
|
2844 |
err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);
|
2845 |
|
2846 |
for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) { |
2847 |
err |= __put_user(set->sig[i + 1], &frame->extramask[i]);
|
2848 |
} |
2849 |
|
2850 |
/* Set up to return from userspace. If provided, use a stub
|
2851 |
already in userspace. */
|
2852 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
2853 |
regs->pr = (unsigned long) ka->sa_restorer; |
2854 |
} else {
|
2855 |
/* Generate return code (system call to sigreturn) */
|
2856 |
err |= __put_user(MOVW(2), &frame->retcode[0]); |
2857 |
err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
|
2858 |
err |= __put_user((TARGET_NR_sigreturn), &frame->retcode[2]);
|
2859 |
regs->pr = (unsigned long) frame->retcode; |
2860 |
} |
2861 |
|
2862 |
if (err)
|
2863 |
goto give_sigsegv;
|
2864 |
|
2865 |
/* Set up registers for signal handler */
|
2866 |
regs->gregs[15] = (unsigned long) frame; |
2867 |
regs->gregs[4] = signal; /* Arg for signal handler */ |
2868 |
regs->gregs[5] = 0; |
2869 |
regs->gregs[6] = (unsigned long) &frame->sc; |
2870 |
regs->pc = (unsigned long) ka->_sa_handler; |
2871 |
|
2872 |
unlock_user_struct(frame, frame_addr, 1);
|
2873 |
return;
|
2874 |
|
2875 |
give_sigsegv:
|
2876 |
unlock_user_struct(frame, frame_addr, 1);
|
2877 |
force_sig(SIGSEGV); |
2878 |
} |
2879 |
|
2880 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
2881 |
target_siginfo_t *info, |
2882 |
target_sigset_t *set, CPUState *regs) |
2883 |
{ |
2884 |
struct target_rt_sigframe *frame;
|
2885 |
abi_ulong frame_addr; |
2886 |
int i;
|
2887 |
int err = 0; |
2888 |
int signal;
|
2889 |
|
2890 |
frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame)); |
2891 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
2892 |
goto give_sigsegv;
|
2893 |
|
2894 |
signal = current_exec_domain_sig(sig); |
2895 |
|
2896 |
err |= copy_siginfo_to_user(&frame->info, info); |
2897 |
|
2898 |
/* Create the ucontext. */
|
2899 |
err |= __put_user(0, &frame->uc.uc_flags);
|
2900 |
err |= __put_user(0, (unsigned long *)&frame->uc.uc_link); |
2901 |
err |= __put_user((unsigned long)target_sigaltstack_used.ss_sp, |
2902 |
&frame->uc.uc_stack.ss_sp); |
2903 |
err |= __put_user(sas_ss_flags(regs->gregs[15]),
|
2904 |
&frame->uc.uc_stack.ss_flags); |
2905 |
err |= __put_user(target_sigaltstack_used.ss_size, |
2906 |
&frame->uc.uc_stack.ss_size); |
2907 |
err |= setup_sigcontext(&frame->uc.uc_mcontext, |
2908 |
regs, set->sig[0]);
|
2909 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
2910 |
err |= __put_user(set->sig[i], &frame->uc.uc_sigmask.sig[i]); |
2911 |
} |
2912 |
|
2913 |
/* Set up to return from userspace. If provided, use a stub
|
2914 |
already in userspace. */
|
2915 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
2916 |
regs->pr = (unsigned long) ka->sa_restorer; |
2917 |
} else {
|
2918 |
/* Generate return code (system call to sigreturn) */
|
2919 |
err |= __put_user(MOVW(2), &frame->retcode[0]); |
2920 |
err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
|
2921 |
err |= __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]);
|
2922 |
regs->pr = (unsigned long) frame->retcode; |
2923 |
} |
2924 |
|
2925 |
if (err)
|
2926 |
goto give_sigsegv;
|
2927 |
|
2928 |
/* Set up registers for signal handler */
|
2929 |
regs->gregs[15] = (unsigned long) frame; |
2930 |
regs->gregs[4] = signal; /* Arg for signal handler */ |
2931 |
regs->gregs[5] = (unsigned long) &frame->info; |
2932 |
regs->gregs[6] = (unsigned long) &frame->uc; |
2933 |
regs->pc = (unsigned long) ka->_sa_handler; |
2934 |
|
2935 |
unlock_user_struct(frame, frame_addr, 1);
|
2936 |
return;
|
2937 |
|
2938 |
give_sigsegv:
|
2939 |
unlock_user_struct(frame, frame_addr, 1);
|
2940 |
force_sig(SIGSEGV); |
2941 |
} |
2942 |
|
2943 |
long do_sigreturn(CPUState *regs)
|
2944 |
{ |
2945 |
struct target_sigframe *frame;
|
2946 |
abi_ulong frame_addr; |
2947 |
sigset_t blocked; |
2948 |
target_sigset_t target_set; |
2949 |
int i;
|
2950 |
int err = 0; |
2951 |
|
2952 |
#if defined(DEBUG_SIGNAL)
|
2953 |
fprintf(stderr, "do_sigreturn\n");
|
2954 |
#endif
|
2955 |
frame_addr = regs->gregs[15];
|
2956 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
2957 |
goto badframe;
|
2958 |
|
2959 |
err |= __get_user(target_set.sig[0], &frame->sc.oldmask);
|
2960 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
2961 |
err |= (__get_user(target_set.sig[i], &frame->extramask[i - 1]));
|
2962 |
} |
2963 |
|
2964 |
if (err)
|
2965 |
goto badframe;
|
2966 |
|
2967 |
target_to_host_sigset_internal(&blocked, &target_set); |
2968 |
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
2969 |
|
2970 |
if (restore_sigcontext(regs, &frame->sc))
|
2971 |
goto badframe;
|
2972 |
|
2973 |
unlock_user_struct(frame, frame_addr, 0);
|
2974 |
return regs->gregs[0]; |
2975 |
|
2976 |
badframe:
|
2977 |
unlock_user_struct(frame, frame_addr, 0);
|
2978 |
force_sig(TARGET_SIGSEGV); |
2979 |
return 0; |
2980 |
} |
2981 |
|
2982 |
long do_rt_sigreturn(CPUState *regs)
|
2983 |
{ |
2984 |
struct target_rt_sigframe *frame;
|
2985 |
abi_ulong frame_addr; |
2986 |
sigset_t blocked; |
2987 |
|
2988 |
#if defined(DEBUG_SIGNAL)
|
2989 |
fprintf(stderr, "do_rt_sigreturn\n");
|
2990 |
#endif
|
2991 |
frame_addr = regs->gregs[15];
|
2992 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
2993 |
goto badframe;
|
2994 |
|
2995 |
target_to_host_sigset(&blocked, &frame->uc.uc_sigmask); |
2996 |
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
2997 |
|
2998 |
if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
|
2999 |
goto badframe;
|
3000 |
|
3001 |
if (do_sigaltstack(frame_addr +
|
3002 |
offsetof(struct target_rt_sigframe, uc.uc_stack),
|
3003 |
0, get_sp_from_cpustate(regs)) == -EFAULT)
|
3004 |
goto badframe;
|
3005 |
|
3006 |
unlock_user_struct(frame, frame_addr, 0);
|
3007 |
return regs->gregs[0]; |
3008 |
|
3009 |
badframe:
|
3010 |
unlock_user_struct(frame, frame_addr, 0);
|
3011 |
force_sig(TARGET_SIGSEGV); |
3012 |
return 0; |
3013 |
} |
3014 |
#elif defined(TARGET_CRIS)
|
3015 |
|
3016 |
struct target_sigcontext {
|
3017 |
struct target_pt_regs regs; /* needs to be first */ |
3018 |
uint32_t oldmask; |
3019 |
uint32_t usp; /* usp before stacking this gunk on it */
|
3020 |
}; |
3021 |
|
3022 |
/* Signal frames. */
|
3023 |
struct target_signal_frame {
|
3024 |
struct target_sigcontext sc;
|
3025 |
uint32_t extramask[TARGET_NSIG_WORDS - 1];
|
3026 |
uint8_t retcode[8]; /* Trampoline code. */ |
3027 |
}; |
3028 |
|
3029 |
struct rt_signal_frame {
|
3030 |
struct siginfo *pinfo;
|
3031 |
void *puc;
|
3032 |
struct siginfo info;
|
3033 |
struct ucontext uc;
|
3034 |
uint8_t retcode[8]; /* Trampoline code. */ |
3035 |
}; |
3036 |
|
3037 |
static void setup_sigcontext(struct target_sigcontext *sc, CPUState *env) |
3038 |
{ |
3039 |
__put_user(env->regs[0], &sc->regs.r0);
|
3040 |
__put_user(env->regs[1], &sc->regs.r1);
|
3041 |
__put_user(env->regs[2], &sc->regs.r2);
|
3042 |
__put_user(env->regs[3], &sc->regs.r3);
|
3043 |
__put_user(env->regs[4], &sc->regs.r4);
|
3044 |
__put_user(env->regs[5], &sc->regs.r5);
|
3045 |
__put_user(env->regs[6], &sc->regs.r6);
|
3046 |
__put_user(env->regs[7], &sc->regs.r7);
|
3047 |
__put_user(env->regs[8], &sc->regs.r8);
|
3048 |
__put_user(env->regs[9], &sc->regs.r9);
|
3049 |
__put_user(env->regs[10], &sc->regs.r10);
|
3050 |
__put_user(env->regs[11], &sc->regs.r11);
|
3051 |
__put_user(env->regs[12], &sc->regs.r12);
|
3052 |
__put_user(env->regs[13], &sc->regs.r13);
|
3053 |
__put_user(env->regs[14], &sc->usp);
|
3054 |
__put_user(env->regs[15], &sc->regs.acr);
|
3055 |
__put_user(env->pregs[PR_MOF], &sc->regs.mof); |
3056 |
__put_user(env->pregs[PR_SRP], &sc->regs.srp); |
3057 |
__put_user(env->pc, &sc->regs.erp); |
3058 |
} |
3059 |
|
3060 |
static void restore_sigcontext(struct target_sigcontext *sc, CPUState *env) |
3061 |
{ |
3062 |
__get_user(env->regs[0], &sc->regs.r0);
|
3063 |
__get_user(env->regs[1], &sc->regs.r1);
|
3064 |
__get_user(env->regs[2], &sc->regs.r2);
|
3065 |
__get_user(env->regs[3], &sc->regs.r3);
|
3066 |
__get_user(env->regs[4], &sc->regs.r4);
|
3067 |
__get_user(env->regs[5], &sc->regs.r5);
|
3068 |
__get_user(env->regs[6], &sc->regs.r6);
|
3069 |
__get_user(env->regs[7], &sc->regs.r7);
|
3070 |
__get_user(env->regs[8], &sc->regs.r8);
|
3071 |
__get_user(env->regs[9], &sc->regs.r9);
|
3072 |
__get_user(env->regs[10], &sc->regs.r10);
|
3073 |
__get_user(env->regs[11], &sc->regs.r11);
|
3074 |
__get_user(env->regs[12], &sc->regs.r12);
|
3075 |
__get_user(env->regs[13], &sc->regs.r13);
|
3076 |
__get_user(env->regs[14], &sc->usp);
|
3077 |
__get_user(env->regs[15], &sc->regs.acr);
|
3078 |
__get_user(env->pregs[PR_MOF], &sc->regs.mof); |
3079 |
__get_user(env->pregs[PR_SRP], &sc->regs.srp); |
3080 |
__get_user(env->pc, &sc->regs.erp); |
3081 |
} |
3082 |
|
3083 |
static abi_ulong get_sigframe(CPUState *env, int framesize) |
3084 |
{ |
3085 |
abi_ulong sp; |
3086 |
/* Align the stack downwards to 4. */
|
3087 |
sp = (env->regs[R_SP] & ~3);
|
3088 |
return sp - framesize;
|
3089 |
} |
3090 |
|
3091 |
static void setup_frame(int sig, struct target_sigaction *ka, |
3092 |
target_sigset_t *set, CPUState *env) |
3093 |
{ |
3094 |
struct target_signal_frame *frame;
|
3095 |
abi_ulong frame_addr; |
3096 |
int err = 0; |
3097 |
int i;
|
3098 |
|
3099 |
frame_addr = get_sigframe(env, sizeof *frame);
|
3100 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
3101 |
goto badframe;
|
3102 |
|
3103 |
/*
|
3104 |
* The CRIS signal return trampoline. A real linux/CRIS kernel doesn't
|
3105 |
* use this trampoline anymore but it sets it up for GDB.
|
3106 |
* In QEMU, using the trampoline simplifies things a bit so we use it.
|
3107 |
*
|
3108 |
* This is movu.w __NR_sigreturn, r9; break 13;
|
3109 |
*/
|
3110 |
err |= __put_user(0x9c5f, frame->retcode+0); |
3111 |
err |= __put_user(TARGET_NR_sigreturn, |
3112 |
frame->retcode+2);
|
3113 |
err |= __put_user(0xe93d, frame->retcode+4); |
3114 |
|
3115 |
/* Save the mask. */
|
3116 |
err |= __put_user(set->sig[0], &frame->sc.oldmask);
|
3117 |
if (err)
|
3118 |
goto badframe;
|
3119 |
|
3120 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
3121 |
if (__put_user(set->sig[i], &frame->extramask[i - 1])) |
3122 |
goto badframe;
|
3123 |
} |
3124 |
|
3125 |
setup_sigcontext(&frame->sc, env); |
3126 |
|
3127 |
/* Move the stack and setup the arguments for the handler. */
|
3128 |
env->regs[R_SP] = (uint32_t) (unsigned long) frame; |
3129 |
env->regs[10] = sig;
|
3130 |
env->pc = (unsigned long) ka->_sa_handler; |
3131 |
/* Link SRP so the guest returns through the trampoline. */
|
3132 |
env->pregs[PR_SRP] = (uint32_t) (unsigned long) &frame->retcode[0]; |
3133 |
|
3134 |
unlock_user_struct(frame, frame_addr, 1);
|
3135 |
return;
|
3136 |
badframe:
|
3137 |
unlock_user_struct(frame, frame_addr, 1);
|
3138 |
force_sig(TARGET_SIGSEGV); |
3139 |
} |
3140 |
|
3141 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
3142 |
target_siginfo_t *info, |
3143 |
target_sigset_t *set, CPUState *env) |
3144 |
{ |
3145 |
fprintf(stderr, "CRIS setup_rt_frame: not implemented\n");
|
3146 |
} |
3147 |
|
3148 |
long do_sigreturn(CPUState *env)
|
3149 |
{ |
3150 |
struct target_signal_frame *frame;
|
3151 |
abi_ulong frame_addr; |
3152 |
target_sigset_t target_set; |
3153 |
sigset_t set; |
3154 |
int i;
|
3155 |
|
3156 |
frame_addr = env->regs[R_SP]; |
3157 |
/* Make sure the guest isn't playing games. */
|
3158 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) |
3159 |
goto badframe;
|
3160 |
|
3161 |
/* Restore blocked signals */
|
3162 |
if (__get_user(target_set.sig[0], &frame->sc.oldmask)) |
3163 |
goto badframe;
|
3164 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
3165 |
if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) |
3166 |
goto badframe;
|
3167 |
} |
3168 |
target_to_host_sigset_internal(&set, &target_set); |
3169 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
3170 |
|
3171 |
restore_sigcontext(&frame->sc, env); |
3172 |
unlock_user_struct(frame, frame_addr, 0);
|
3173 |
return env->regs[10]; |
3174 |
badframe:
|
3175 |
unlock_user_struct(frame, frame_addr, 0);
|
3176 |
force_sig(TARGET_SIGSEGV); |
3177 |
} |
3178 |
|
3179 |
long do_rt_sigreturn(CPUState *env)
|
3180 |
{ |
3181 |
fprintf(stderr, "CRIS do_rt_sigreturn: not implemented\n");
|
3182 |
return -TARGET_ENOSYS;
|
3183 |
} |
3184 |
|
3185 |
#else
|
3186 |
|
3187 |
static void setup_frame(int sig, struct target_sigaction *ka, |
3188 |
target_sigset_t *set, CPUState *env) |
3189 |
{ |
3190 |
fprintf(stderr, "setup_frame: not implemented\n");
|
3191 |
} |
3192 |
|
3193 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
3194 |
target_siginfo_t *info, |
3195 |
target_sigset_t *set, CPUState *env) |
3196 |
{ |
3197 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
3198 |
} |
3199 |
|
3200 |
long do_sigreturn(CPUState *env)
|
3201 |
{ |
3202 |
fprintf(stderr, "do_sigreturn: not implemented\n");
|
3203 |
return -TARGET_ENOSYS;
|
3204 |
} |
3205 |
|
3206 |
long do_rt_sigreturn(CPUState *env)
|
3207 |
{ |
3208 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
3209 |
return -TARGET_ENOSYS;
|
3210 |
} |
3211 |
|
3212 |
#endif
|
3213 |
|
3214 |
void process_pending_signals(CPUState *cpu_env)
|
3215 |
{ |
3216 |
int sig;
|
3217 |
abi_ulong handler; |
3218 |
sigset_t set, old_set; |
3219 |
target_sigset_t target_old_set; |
3220 |
struct emulated_sigtable *k;
|
3221 |
struct target_sigaction *sa;
|
3222 |
struct sigqueue *q;
|
3223 |
TaskState *ts = cpu_env->opaque; |
3224 |
|
3225 |
if (!ts->signal_pending)
|
3226 |
return;
|
3227 |
|
3228 |
/* FIXME: This is not threadsafe. */
|
3229 |
k = ts->sigtab; |
3230 |
for(sig = 1; sig <= TARGET_NSIG; sig++) { |
3231 |
if (k->pending)
|
3232 |
goto handle_signal;
|
3233 |
k++; |
3234 |
} |
3235 |
/* if no signal is pending, just return */
|
3236 |
ts->signal_pending = 0;
|
3237 |
return;
|
3238 |
|
3239 |
handle_signal:
|
3240 |
#ifdef DEBUG_SIGNAL
|
3241 |
fprintf(stderr, "qemu: process signal %d\n", sig);
|
3242 |
#endif
|
3243 |
/* dequeue signal */
|
3244 |
q = k->first; |
3245 |
k->first = q->next; |
3246 |
if (!k->first)
|
3247 |
k->pending = 0;
|
3248 |
|
3249 |
sig = gdb_handlesig (cpu_env, sig); |
3250 |
if (!sig) {
|
3251 |
sa = NULL;
|
3252 |
handler = TARGET_SIG_IGN; |
3253 |
} else {
|
3254 |
sa = &sigact_table[sig - 1];
|
3255 |
handler = sa->_sa_handler; |
3256 |
} |
3257 |
|
3258 |
if (handler == TARGET_SIG_DFL) {
|
3259 |
/* default handler : ignore some signal. The other are job control or fatal */
|
3260 |
if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
|
3261 |
kill(getpid(),SIGSTOP); |
3262 |
} else if (sig != TARGET_SIGCHLD && |
3263 |
sig != TARGET_SIGURG && |
3264 |
sig != TARGET_SIGWINCH && |
3265 |
sig != TARGET_SIGCONT) { |
3266 |
force_sig(sig); |
3267 |
} |
3268 |
} else if (handler == TARGET_SIG_IGN) { |
3269 |
/* ignore sig */
|
3270 |
} else if (handler == TARGET_SIG_ERR) { |
3271 |
force_sig(sig); |
3272 |
} else {
|
3273 |
/* compute the blocked signals during the handler execution */
|
3274 |
target_to_host_sigset(&set, &sa->sa_mask); |
3275 |
/* SA_NODEFER indicates that the current signal should not be
|
3276 |
blocked during the handler */
|
3277 |
if (!(sa->sa_flags & TARGET_SA_NODEFER))
|
3278 |
sigaddset(&set, target_to_host_signal(sig)); |
3279 |
|
3280 |
/* block signals in the handler using Linux */
|
3281 |
sigprocmask(SIG_BLOCK, &set, &old_set); |
3282 |
/* save the previous blocked signal state to restore it at the
|
3283 |
end of the signal execution (see do_sigreturn) */
|
3284 |
host_to_target_sigset_internal(&target_old_set, &old_set); |
3285 |
|
3286 |
/* if the CPU is in VM86 mode, we restore the 32 bit values */
|
3287 |
#if defined(TARGET_I386) && !defined(TARGET_X86_64)
|
3288 |
{ |
3289 |
CPUX86State *env = cpu_env; |
3290 |
if (env->eflags & VM_MASK)
|
3291 |
save_v86_state(env); |
3292 |
} |
3293 |
#endif
|
3294 |
/* prepare the stack frame of the virtual CPU */
|
3295 |
if (sa->sa_flags & TARGET_SA_SIGINFO)
|
3296 |
setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env); |
3297 |
else
|
3298 |
setup_frame(sig, sa, &target_old_set, cpu_env); |
3299 |
if (sa->sa_flags & TARGET_SA_RESETHAND)
|
3300 |
sa->_sa_handler = TARGET_SIG_DFL; |
3301 |
} |
3302 |
if (q != &k->info)
|
3303 |
free_sigqueue(cpu_env, q); |
3304 |
} |