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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., 675 Mass Ave, Cambridge, MA 02139, 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 <sys/ucontext.h> |
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#include "qemu.h" |
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#include "target_signal.h" |
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//#define DEBUG_SIGNAL
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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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static inline 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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void target_to_host_sigset_internal(sigset_t *d, 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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|
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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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|
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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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} |
252 |
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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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} |
265 |
|
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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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|
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/* generate signal conversion tables */
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for(i = 1; i <= 64; i++) { |
275 |
if (host_to_target_signal_table[i] == 0) |
276 |
host_to_target_signal_table[i] = i; |
277 |
} |
278 |
for(i = 1; i <= 64; i++) { |
279 |
j = host_to_target_signal_table[i]; |
280 |
target_to_host_signal_table[j] = i; |
281 |
} |
282 |
|
283 |
/* 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)); |
286 |
|
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sigfillset(&act.sa_mask); |
288 |
act.sa_flags = SA_SIGINFO; |
289 |
act.sa_sigaction = host_signal_handler; |
290 |
for(i = 1; i <= TARGET_NSIG; i++) { |
291 |
host_sig = target_to_host_signal(i); |
292 |
sigaction(host_sig, NULL, &oact);
|
293 |
if (oact.sa_sigaction == (void *)SIG_IGN) { |
294 |
sigact_table[i - 1]._sa_handler = TARGET_SIG_IGN;
|
295 |
} else if (oact.sa_sigaction == (void *)SIG_DFL) { |
296 |
sigact_table[i - 1]._sa_handler = TARGET_SIG_DFL;
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297 |
} |
298 |
/* If there's already a handler installed then something has
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299 |
gone horribly wrong, so don't even try to handle that case. */
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300 |
/* Install some handlers for our own use. */
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301 |
if (host_sig == SIGSEGV || host_sig == SIGBUS) {
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302 |
sigaction(host_sig, &act, NULL);
|
303 |
} |
304 |
} |
305 |
} |
306 |
|
307 |
/* signal queue handling */
|
308 |
|
309 |
static inline struct sigqueue *alloc_sigqueue(CPUState *env) |
310 |
{ |
311 |
TaskState *ts = env->opaque; |
312 |
struct sigqueue *q = ts->first_free;
|
313 |
if (!q)
|
314 |
return NULL; |
315 |
ts->first_free = q->next; |
316 |
return q;
|
317 |
} |
318 |
|
319 |
static inline void free_sigqueue(CPUState *env, struct sigqueue *q) |
320 |
{ |
321 |
TaskState *ts = env->opaque; |
322 |
q->next = ts->first_free; |
323 |
ts->first_free = q; |
324 |
} |
325 |
|
326 |
/* abort execution with signal */
|
327 |
void __attribute((noreturn)) force_sig(int sig) |
328 |
{ |
329 |
int host_sig;
|
330 |
host_sig = target_to_host_signal(sig); |
331 |
fprintf(stderr, "qemu: uncaught target signal %d (%s) - exiting\n",
|
332 |
sig, strsignal(host_sig)); |
333 |
#if 1 |
334 |
_exit(-host_sig); |
335 |
#else
|
336 |
{ |
337 |
struct sigaction act;
|
338 |
sigemptyset(&act.sa_mask); |
339 |
act.sa_flags = SA_SIGINFO; |
340 |
act.sa_sigaction = SIG_DFL; |
341 |
sigaction(SIGABRT, &act, NULL);
|
342 |
abort(); |
343 |
} |
344 |
#endif
|
345 |
} |
346 |
|
347 |
/* queue a signal so that it will be send to the virtual CPU as soon
|
348 |
as possible */
|
349 |
int queue_signal(CPUState *env, int sig, target_siginfo_t *info) |
350 |
{ |
351 |
TaskState *ts = env->opaque; |
352 |
struct emulated_sigtable *k;
|
353 |
struct sigqueue *q, **pq;
|
354 |
abi_ulong handler; |
355 |
|
356 |
#if defined(DEBUG_SIGNAL)
|
357 |
fprintf(stderr, "queue_signal: sig=%d\n",
|
358 |
sig); |
359 |
#endif
|
360 |
k = &ts->sigtab[sig - 1];
|
361 |
handler = sigact_table[sig - 1]._sa_handler;
|
362 |
if (handler == TARGET_SIG_DFL) {
|
363 |
/* default handler : ignore some signal. The other are fatal */
|
364 |
if (sig != TARGET_SIGCHLD &&
|
365 |
sig != TARGET_SIGURG && |
366 |
sig != TARGET_SIGWINCH) { |
367 |
force_sig(sig); |
368 |
} else {
|
369 |
return 0; /* indicate ignored */ |
370 |
} |
371 |
} else if (handler == TARGET_SIG_IGN) { |
372 |
/* ignore signal */
|
373 |
return 0; |
374 |
} else if (handler == TARGET_SIG_ERR) { |
375 |
force_sig(sig); |
376 |
} else {
|
377 |
pq = &k->first; |
378 |
if (sig < TARGET_SIGRTMIN) {
|
379 |
/* if non real time signal, we queue exactly one signal */
|
380 |
if (!k->pending)
|
381 |
q = &k->info; |
382 |
else
|
383 |
return 0; |
384 |
} else {
|
385 |
if (!k->pending) {
|
386 |
/* first signal */
|
387 |
q = &k->info; |
388 |
} else {
|
389 |
q = alloc_sigqueue(env); |
390 |
if (!q)
|
391 |
return -EAGAIN;
|
392 |
while (*pq != NULL) |
393 |
pq = &(*pq)->next; |
394 |
} |
395 |
} |
396 |
*pq = q; |
397 |
q->info = *info; |
398 |
q->next = NULL;
|
399 |
k->pending = 1;
|
400 |
/* signal that a new signal is pending */
|
401 |
ts->signal_pending = 1;
|
402 |
return 1; /* indicates that the signal was queued */ |
403 |
} |
404 |
} |
405 |
|
406 |
static void host_signal_handler(int host_signum, siginfo_t *info, |
407 |
void *puc)
|
408 |
{ |
409 |
int sig;
|
410 |
target_siginfo_t tinfo; |
411 |
|
412 |
/* the CPU emulator uses some host signals to detect exceptions,
|
413 |
we we forward to it some signals */
|
414 |
if (host_signum == SIGSEGV || host_signum == SIGBUS) {
|
415 |
if (cpu_signal_handler(host_signum, info, puc))
|
416 |
return;
|
417 |
} |
418 |
|
419 |
/* get target signal number */
|
420 |
sig = host_to_target_signal(host_signum); |
421 |
if (sig < 1 || sig > TARGET_NSIG) |
422 |
return;
|
423 |
#if defined(DEBUG_SIGNAL)
|
424 |
fprintf(stderr, "qemu: got signal %d\n", sig);
|
425 |
#endif
|
426 |
host_to_target_siginfo_noswap(&tinfo, info); |
427 |
if (queue_signal(thread_env, sig, &tinfo) == 1) { |
428 |
/* interrupt the virtual CPU as soon as possible */
|
429 |
cpu_interrupt(thread_env, CPU_INTERRUPT_EXIT); |
430 |
} |
431 |
} |
432 |
|
433 |
/* do_sigaltstack() returns target values and errnos. */
|
434 |
/* compare linux/kernel/signal.c:do_sigaltstack() */
|
435 |
abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp) |
436 |
{ |
437 |
int ret;
|
438 |
struct target_sigaltstack oss;
|
439 |
|
440 |
/* XXX: test errors */
|
441 |
if(uoss_addr)
|
442 |
{ |
443 |
__put_user(target_sigaltstack_used.ss_sp, &oss.ss_sp); |
444 |
__put_user(target_sigaltstack_used.ss_size, &oss.ss_size); |
445 |
__put_user(sas_ss_flags(sp), &oss.ss_flags); |
446 |
} |
447 |
|
448 |
if(uss_addr)
|
449 |
{ |
450 |
struct target_sigaltstack *uss;
|
451 |
struct target_sigaltstack ss;
|
452 |
|
453 |
ret = -TARGET_EFAULT; |
454 |
if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1) |
455 |
|| __get_user(ss.ss_sp, &uss->ss_sp) |
456 |
|| __get_user(ss.ss_size, &uss->ss_size) |
457 |
|| __get_user(ss.ss_flags, &uss->ss_flags)) |
458 |
goto out;
|
459 |
unlock_user_struct(uss, uss_addr, 0);
|
460 |
|
461 |
ret = -TARGET_EPERM; |
462 |
if (on_sig_stack(sp))
|
463 |
goto out;
|
464 |
|
465 |
ret = -TARGET_EINVAL; |
466 |
if (ss.ss_flags != TARGET_SS_DISABLE
|
467 |
&& ss.ss_flags != TARGET_SS_ONSTACK |
468 |
&& ss.ss_flags != 0)
|
469 |
goto out;
|
470 |
|
471 |
if (ss.ss_flags == TARGET_SS_DISABLE) {
|
472 |
ss.ss_size = 0;
|
473 |
ss.ss_sp = 0;
|
474 |
} else {
|
475 |
ret = -TARGET_ENOMEM; |
476 |
if (ss.ss_size < MINSIGSTKSZ)
|
477 |
goto out;
|
478 |
} |
479 |
|
480 |
target_sigaltstack_used.ss_sp = ss.ss_sp; |
481 |
target_sigaltstack_used.ss_size = ss.ss_size; |
482 |
} |
483 |
|
484 |
if (uoss_addr) {
|
485 |
ret = -TARGET_EFAULT; |
486 |
if (copy_to_user(uoss_addr, &oss, sizeof(oss))) |
487 |
goto out;
|
488 |
} |
489 |
|
490 |
ret = 0;
|
491 |
out:
|
492 |
return ret;
|
493 |
} |
494 |
|
495 |
/* do_sigaction() return host values and errnos */
|
496 |
int do_sigaction(int sig, const struct target_sigaction *act, |
497 |
struct target_sigaction *oact)
|
498 |
{ |
499 |
struct target_sigaction *k;
|
500 |
struct sigaction act1;
|
501 |
int host_sig;
|
502 |
int ret = 0; |
503 |
|
504 |
if (sig < 1 || sig > TARGET_NSIG || sig == SIGKILL || sig == SIGSTOP) |
505 |
return -EINVAL;
|
506 |
k = &sigact_table[sig - 1];
|
507 |
#if defined(DEBUG_SIGNAL)
|
508 |
fprintf(stderr, "sigaction sig=%d act=0x%08x, oact=0x%08x\n",
|
509 |
sig, (int)act, (int)oact); |
510 |
#endif
|
511 |
if (oact) {
|
512 |
oact->_sa_handler = tswapl(k->_sa_handler); |
513 |
oact->sa_flags = tswapl(k->sa_flags); |
514 |
#if !defined(TARGET_MIPS)
|
515 |
oact->sa_restorer = tswapl(k->sa_restorer); |
516 |
#endif
|
517 |
oact->sa_mask = k->sa_mask; |
518 |
} |
519 |
if (act) {
|
520 |
/* FIXME: This is not threadsafe. */
|
521 |
k->_sa_handler = tswapl(act->_sa_handler); |
522 |
k->sa_flags = tswapl(act->sa_flags); |
523 |
#if !defined(TARGET_MIPS)
|
524 |
k->sa_restorer = tswapl(act->sa_restorer); |
525 |
#endif
|
526 |
k->sa_mask = act->sa_mask; |
527 |
|
528 |
/* we update the host linux signal state */
|
529 |
host_sig = target_to_host_signal(sig); |
530 |
if (host_sig != SIGSEGV && host_sig != SIGBUS) {
|
531 |
sigfillset(&act1.sa_mask); |
532 |
act1.sa_flags = SA_SIGINFO; |
533 |
if (k->sa_flags & TARGET_SA_RESTART)
|
534 |
act1.sa_flags |= SA_RESTART; |
535 |
/* NOTE: it is important to update the host kernel signal
|
536 |
ignore state to avoid getting unexpected interrupted
|
537 |
syscalls */
|
538 |
if (k->_sa_handler == TARGET_SIG_IGN) {
|
539 |
act1.sa_sigaction = (void *)SIG_IGN;
|
540 |
} else if (k->_sa_handler == TARGET_SIG_DFL) { |
541 |
act1.sa_sigaction = (void *)SIG_DFL;
|
542 |
} else {
|
543 |
act1.sa_sigaction = host_signal_handler; |
544 |
} |
545 |
ret = sigaction(host_sig, &act1, NULL);
|
546 |
} |
547 |
} |
548 |
return ret;
|
549 |
} |
550 |
|
551 |
#ifndef offsetof
|
552 |
#define offsetof(type, field) ((size_t) &((type *)0)->field) |
553 |
#endif
|
554 |
|
555 |
static inline int copy_siginfo_to_user(target_siginfo_t *tinfo, |
556 |
const target_siginfo_t *info)
|
557 |
{ |
558 |
tswap_siginfo(tinfo, info); |
559 |
return 0; |
560 |
} |
561 |
|
562 |
static inline int current_exec_domain_sig(int sig) |
563 |
{ |
564 |
return /* current->exec_domain && current->exec_domain->signal_invmap |
565 |
&& sig < 32 ? current->exec_domain->signal_invmap[sig] : */ sig;
|
566 |
} |
567 |
|
568 |
#if defined(TARGET_I386) && TARGET_ABI_BITS == 32 |
569 |
|
570 |
/* from the Linux kernel */
|
571 |
|
572 |
struct target_fpreg {
|
573 |
uint16_t significand[4];
|
574 |
uint16_t exponent; |
575 |
}; |
576 |
|
577 |
struct target_fpxreg {
|
578 |
uint16_t significand[4];
|
579 |
uint16_t exponent; |
580 |
uint16_t padding[3];
|
581 |
}; |
582 |
|
583 |
struct target_xmmreg {
|
584 |
abi_ulong element[4];
|
585 |
}; |
586 |
|
587 |
struct target_fpstate {
|
588 |
/* Regular FPU environment */
|
589 |
abi_ulong cw; |
590 |
abi_ulong sw; |
591 |
abi_ulong tag; |
592 |
abi_ulong ipoff; |
593 |
abi_ulong cssel; |
594 |
abi_ulong dataoff; |
595 |
abi_ulong datasel; |
596 |
struct target_fpreg _st[8]; |
597 |
uint16_t status; |
598 |
uint16_t magic; /* 0xffff = regular FPU data only */
|
599 |
|
600 |
/* FXSR FPU environment */
|
601 |
abi_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */ |
602 |
abi_ulong mxcsr; |
603 |
abi_ulong reserved; |
604 |
struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */ |
605 |
struct target_xmmreg _xmm[8]; |
606 |
abi_ulong padding[56];
|
607 |
}; |
608 |
|
609 |
#define X86_FXSR_MAGIC 0x0000 |
610 |
|
611 |
struct target_sigcontext {
|
612 |
uint16_t gs, __gsh; |
613 |
uint16_t fs, __fsh; |
614 |
uint16_t es, __esh; |
615 |
uint16_t ds, __dsh; |
616 |
abi_ulong edi; |
617 |
abi_ulong esi; |
618 |
abi_ulong ebp; |
619 |
abi_ulong esp; |
620 |
abi_ulong ebx; |
621 |
abi_ulong edx; |
622 |
abi_ulong ecx; |
623 |
abi_ulong eax; |
624 |
abi_ulong trapno; |
625 |
abi_ulong err; |
626 |
abi_ulong eip; |
627 |
uint16_t cs, __csh; |
628 |
abi_ulong eflags; |
629 |
abi_ulong esp_at_signal; |
630 |
uint16_t ss, __ssh; |
631 |
abi_ulong fpstate; /* pointer */
|
632 |
abi_ulong oldmask; |
633 |
abi_ulong cr2; |
634 |
}; |
635 |
|
636 |
struct target_ucontext {
|
637 |
abi_ulong tuc_flags; |
638 |
abi_ulong tuc_link; |
639 |
target_stack_t tuc_stack; |
640 |
struct target_sigcontext tuc_mcontext;
|
641 |
target_sigset_t tuc_sigmask; /* mask last for extensibility */
|
642 |
}; |
643 |
|
644 |
struct sigframe
|
645 |
{ |
646 |
abi_ulong pretcode; |
647 |
int sig;
|
648 |
struct target_sigcontext sc;
|
649 |
struct target_fpstate fpstate;
|
650 |
abi_ulong extramask[TARGET_NSIG_WORDS-1];
|
651 |
char retcode[8]; |
652 |
}; |
653 |
|
654 |
struct rt_sigframe
|
655 |
{ |
656 |
abi_ulong pretcode; |
657 |
int sig;
|
658 |
abi_ulong pinfo; |
659 |
abi_ulong puc; |
660 |
struct target_siginfo info;
|
661 |
struct target_ucontext uc;
|
662 |
struct target_fpstate fpstate;
|
663 |
char retcode[8]; |
664 |
}; |
665 |
|
666 |
/*
|
667 |
* Set up a signal frame.
|
668 |
*/
|
669 |
|
670 |
/* XXX: save x87 state */
|
671 |
static int |
672 |
setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate, |
673 |
CPUX86State *env, abi_ulong mask, abi_ulong fpstate_addr) |
674 |
{ |
675 |
int err = 0; |
676 |
uint16_t magic; |
677 |
|
678 |
/* already locked in setup_frame() */
|
679 |
err |= __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs); |
680 |
err |= __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs); |
681 |
err |= __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es); |
682 |
err |= __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds); |
683 |
err |= __put_user(env->regs[R_EDI], &sc->edi); |
684 |
err |= __put_user(env->regs[R_ESI], &sc->esi); |
685 |
err |= __put_user(env->regs[R_EBP], &sc->ebp); |
686 |
err |= __put_user(env->regs[R_ESP], &sc->esp); |
687 |
err |= __put_user(env->regs[R_EBX], &sc->ebx); |
688 |
err |= __put_user(env->regs[R_EDX], &sc->edx); |
689 |
err |= __put_user(env->regs[R_ECX], &sc->ecx); |
690 |
err |= __put_user(env->regs[R_EAX], &sc->eax); |
691 |
err |= __put_user(env->exception_index, &sc->trapno); |
692 |
err |= __put_user(env->error_code, &sc->err); |
693 |
err |= __put_user(env->eip, &sc->eip); |
694 |
err |= __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs); |
695 |
err |= __put_user(env->eflags, &sc->eflags); |
696 |
err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal); |
697 |
err |= __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss); |
698 |
|
699 |
cpu_x86_fsave(env, fpstate_addr, 1);
|
700 |
fpstate->status = fpstate->sw; |
701 |
magic = 0xffff;
|
702 |
err |= __put_user(magic, &fpstate->magic); |
703 |
err |= __put_user(fpstate_addr, &sc->fpstate); |
704 |
|
705 |
/* non-iBCS2 extensions.. */
|
706 |
err |= __put_user(mask, &sc->oldmask); |
707 |
err |= __put_user(env->cr[2], &sc->cr2);
|
708 |
return err;
|
709 |
} |
710 |
|
711 |
/*
|
712 |
* Determine which stack to use..
|
713 |
*/
|
714 |
|
715 |
static inline abi_ulong |
716 |
get_sigframe(struct target_sigaction *ka, CPUX86State *env, size_t frame_size)
|
717 |
{ |
718 |
unsigned long esp; |
719 |
|
720 |
/* Default to using normal stack */
|
721 |
esp = env->regs[R_ESP]; |
722 |
/* This is the X/Open sanctioned signal stack switching. */
|
723 |
if (ka->sa_flags & TARGET_SA_ONSTACK) {
|
724 |
if (sas_ss_flags(esp) == 0) |
725 |
esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
726 |
} |
727 |
|
728 |
/* This is the legacy signal stack switching. */
|
729 |
else
|
730 |
if ((env->segs[R_SS].selector & 0xffff) != __USER_DS && |
731 |
!(ka->sa_flags & TARGET_SA_RESTORER) && |
732 |
ka->sa_restorer) { |
733 |
esp = (unsigned long) ka->sa_restorer; |
734 |
} |
735 |
return (esp - frame_size) & -8ul; |
736 |
} |
737 |
|
738 |
/* compare linux/arch/i386/kernel/signal.c:setup_frame() */
|
739 |
static void setup_frame(int sig, struct target_sigaction *ka, |
740 |
target_sigset_t *set, CPUX86State *env) |
741 |
{ |
742 |
abi_ulong frame_addr; |
743 |
struct sigframe *frame;
|
744 |
int i, err = 0; |
745 |
|
746 |
frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
747 |
|
748 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
749 |
goto give_sigsegv;
|
750 |
|
751 |
err |= __put_user(current_exec_domain_sig(sig), |
752 |
&frame->sig); |
753 |
if (err)
|
754 |
goto give_sigsegv;
|
755 |
|
756 |
setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0],
|
757 |
frame_addr + offsetof(struct sigframe, fpstate));
|
758 |
if (err)
|
759 |
goto give_sigsegv;
|
760 |
|
761 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
762 |
if (__put_user(set->sig[i], &frame->extramask[i - 1])) |
763 |
goto give_sigsegv;
|
764 |
} |
765 |
|
766 |
/* Set up to return from userspace. If provided, use a stub
|
767 |
already in userspace. */
|
768 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
769 |
err |= __put_user(ka->sa_restorer, &frame->pretcode); |
770 |
} else {
|
771 |
uint16_t val16; |
772 |
abi_ulong retcode_addr; |
773 |
retcode_addr = frame_addr + offsetof(struct sigframe, retcode);
|
774 |
err |= __put_user(retcode_addr, &frame->pretcode); |
775 |
/* This is popl %eax ; movl $,%eax ; int $0x80 */
|
776 |
val16 = 0xb858;
|
777 |
err |= __put_user(val16, (uint16_t *)(frame->retcode+0));
|
778 |
err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2)); |
779 |
val16 = 0x80cd;
|
780 |
err |= __put_user(val16, (uint16_t *)(frame->retcode+6));
|
781 |
} |
782 |
|
783 |
if (err)
|
784 |
goto give_sigsegv;
|
785 |
|
786 |
/* Set up registers for signal handler */
|
787 |
env->regs[R_ESP] = frame_addr; |
788 |
env->eip = ka->_sa_handler; |
789 |
|
790 |
cpu_x86_load_seg(env, R_DS, __USER_DS); |
791 |
cpu_x86_load_seg(env, R_ES, __USER_DS); |
792 |
cpu_x86_load_seg(env, R_SS, __USER_DS); |
793 |
cpu_x86_load_seg(env, R_CS, __USER_CS); |
794 |
env->eflags &= ~TF_MASK; |
795 |
|
796 |
unlock_user_struct(frame, frame_addr, 1);
|
797 |
|
798 |
return;
|
799 |
|
800 |
give_sigsegv:
|
801 |
unlock_user_struct(frame, frame_addr, 1);
|
802 |
if (sig == TARGET_SIGSEGV)
|
803 |
ka->_sa_handler = TARGET_SIG_DFL; |
804 |
force_sig(TARGET_SIGSEGV /* , current */);
|
805 |
} |
806 |
|
807 |
/* compare linux/arch/i386/kernel/signal.c:setup_rt_frame() */
|
808 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
809 |
target_siginfo_t *info, |
810 |
target_sigset_t *set, CPUX86State *env) |
811 |
{ |
812 |
abi_ulong frame_addr, addr; |
813 |
struct rt_sigframe *frame;
|
814 |
int i, err = 0; |
815 |
|
816 |
frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
817 |
|
818 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
819 |
goto give_sigsegv;
|
820 |
|
821 |
err |= __put_user(current_exec_domain_sig(sig), |
822 |
&frame->sig); |
823 |
addr = frame_addr + offsetof(struct rt_sigframe, info);
|
824 |
err |= __put_user(addr, &frame->pinfo); |
825 |
addr = frame_addr + offsetof(struct rt_sigframe, uc);
|
826 |
err |= __put_user(addr, &frame->puc); |
827 |
err |= copy_siginfo_to_user(&frame->info, info); |
828 |
if (err)
|
829 |
goto give_sigsegv;
|
830 |
|
831 |
/* Create the ucontext. */
|
832 |
err |= __put_user(0, &frame->uc.tuc_flags);
|
833 |
err |= __put_user(0, &frame->uc.tuc_link);
|
834 |
err |= __put_user(target_sigaltstack_used.ss_sp, |
835 |
&frame->uc.tuc_stack.ss_sp); |
836 |
err |= __put_user(sas_ss_flags(get_sp_from_cpustate(env)), |
837 |
&frame->uc.tuc_stack.ss_flags); |
838 |
err |= __put_user(target_sigaltstack_used.ss_size, |
839 |
&frame->uc.tuc_stack.ss_size); |
840 |
err |= setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate, |
841 |
env, set->sig[0],
|
842 |
frame_addr + offsetof(struct rt_sigframe, fpstate));
|
843 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
844 |
if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
|
845 |
goto give_sigsegv;
|
846 |
} |
847 |
|
848 |
/* Set up to return from userspace. If provided, use a stub
|
849 |
already in userspace. */
|
850 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
851 |
err |= __put_user(ka->sa_restorer, &frame->pretcode); |
852 |
} else {
|
853 |
uint16_t val16; |
854 |
addr = frame_addr + offsetof(struct rt_sigframe, retcode);
|
855 |
err |= __put_user(addr, &frame->pretcode); |
856 |
/* This is movl $,%eax ; int $0x80 */
|
857 |
err |= __put_user(0xb8, (char *)(frame->retcode+0)); |
858 |
err |= __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1)); |
859 |
val16 = 0x80cd;
|
860 |
err |= __put_user(val16, (uint16_t *)(frame->retcode+5));
|
861 |
} |
862 |
|
863 |
if (err)
|
864 |
goto give_sigsegv;
|
865 |
|
866 |
/* Set up registers for signal handler */
|
867 |
env->regs[R_ESP] = frame_addr; |
868 |
env->eip = ka->_sa_handler; |
869 |
|
870 |
cpu_x86_load_seg(env, R_DS, __USER_DS); |
871 |
cpu_x86_load_seg(env, R_ES, __USER_DS); |
872 |
cpu_x86_load_seg(env, R_SS, __USER_DS); |
873 |
cpu_x86_load_seg(env, R_CS, __USER_CS); |
874 |
env->eflags &= ~TF_MASK; |
875 |
|
876 |
unlock_user_struct(frame, frame_addr, 1);
|
877 |
|
878 |
return;
|
879 |
|
880 |
give_sigsegv:
|
881 |
unlock_user_struct(frame, frame_addr, 1);
|
882 |
if (sig == TARGET_SIGSEGV)
|
883 |
ka->_sa_handler = TARGET_SIG_DFL; |
884 |
force_sig(TARGET_SIGSEGV /* , current */);
|
885 |
} |
886 |
|
887 |
static int |
888 |
restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax) |
889 |
{ |
890 |
unsigned int err = 0; |
891 |
abi_ulong fpstate_addr; |
892 |
unsigned int tmpflags; |
893 |
|
894 |
cpu_x86_load_seg(env, R_GS, tswap16(sc->gs)); |
895 |
cpu_x86_load_seg(env, R_FS, tswap16(sc->fs)); |
896 |
cpu_x86_load_seg(env, R_ES, tswap16(sc->es)); |
897 |
cpu_x86_load_seg(env, R_DS, tswap16(sc->ds)); |
898 |
|
899 |
env->regs[R_EDI] = tswapl(sc->edi); |
900 |
env->regs[R_ESI] = tswapl(sc->esi); |
901 |
env->regs[R_EBP] = tswapl(sc->ebp); |
902 |
env->regs[R_ESP] = tswapl(sc->esp); |
903 |
env->regs[R_EBX] = tswapl(sc->ebx); |
904 |
env->regs[R_EDX] = tswapl(sc->edx); |
905 |
env->regs[R_ECX] = tswapl(sc->ecx); |
906 |
env->eip = tswapl(sc->eip); |
907 |
|
908 |
cpu_x86_load_seg(env, R_CS, lduw(&sc->cs) | 3);
|
909 |
cpu_x86_load_seg(env, R_SS, lduw(&sc->ss) | 3);
|
910 |
|
911 |
tmpflags = tswapl(sc->eflags); |
912 |
env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5); |
913 |
// regs->orig_eax = -1; /* disable syscall checks */
|
914 |
|
915 |
fpstate_addr = tswapl(sc->fpstate); |
916 |
if (fpstate_addr != 0) { |
917 |
if (!access_ok(VERIFY_READ, fpstate_addr,
|
918 |
sizeof(struct target_fpstate))) |
919 |
goto badframe;
|
920 |
cpu_x86_frstor(env, fpstate_addr, 1);
|
921 |
} |
922 |
|
923 |
*peax = tswapl(sc->eax); |
924 |
return err;
|
925 |
badframe:
|
926 |
return 1; |
927 |
} |
928 |
|
929 |
long do_sigreturn(CPUX86State *env)
|
930 |
{ |
931 |
struct sigframe *frame;
|
932 |
abi_ulong frame_addr = env->regs[R_ESP] - 8;
|
933 |
target_sigset_t target_set; |
934 |
sigset_t set; |
935 |
int eax, i;
|
936 |
|
937 |
#if defined(DEBUG_SIGNAL)
|
938 |
fprintf(stderr, "do_sigreturn\n");
|
939 |
#endif
|
940 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
941 |
goto badframe;
|
942 |
/* set blocked signals */
|
943 |
if (__get_user(target_set.sig[0], &frame->sc.oldmask)) |
944 |
goto badframe;
|
945 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
946 |
if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) |
947 |
goto badframe;
|
948 |
} |
949 |
|
950 |
target_to_host_sigset_internal(&set, &target_set); |
951 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
952 |
|
953 |
/* restore registers */
|
954 |
if (restore_sigcontext(env, &frame->sc, &eax))
|
955 |
goto badframe;
|
956 |
unlock_user_struct(frame, frame_addr, 0);
|
957 |
return eax;
|
958 |
|
959 |
badframe:
|
960 |
unlock_user_struct(frame, frame_addr, 0);
|
961 |
force_sig(TARGET_SIGSEGV); |
962 |
return 0; |
963 |
} |
964 |
|
965 |
long do_rt_sigreturn(CPUX86State *env)
|
966 |
{ |
967 |
abi_ulong frame_addr; |
968 |
struct rt_sigframe *frame;
|
969 |
sigset_t set; |
970 |
int eax;
|
971 |
|
972 |
frame_addr = env->regs[R_ESP] - 4;
|
973 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
974 |
goto badframe;
|
975 |
target_to_host_sigset(&set, &frame->uc.tuc_sigmask); |
976 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
977 |
|
978 |
if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax))
|
979 |
goto badframe;
|
980 |
|
981 |
if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0, |
982 |
get_sp_from_cpustate(env)) == -EFAULT) |
983 |
goto badframe;
|
984 |
|
985 |
unlock_user_struct(frame, frame_addr, 0);
|
986 |
return eax;
|
987 |
|
988 |
badframe:
|
989 |
unlock_user_struct(frame, frame_addr, 0);
|
990 |
force_sig(TARGET_SIGSEGV); |
991 |
return 0; |
992 |
} |
993 |
|
994 |
#elif defined(TARGET_ARM)
|
995 |
|
996 |
struct target_sigcontext {
|
997 |
abi_ulong trap_no; |
998 |
abi_ulong error_code; |
999 |
abi_ulong oldmask; |
1000 |
abi_ulong arm_r0; |
1001 |
abi_ulong arm_r1; |
1002 |
abi_ulong arm_r2; |
1003 |
abi_ulong arm_r3; |
1004 |
abi_ulong arm_r4; |
1005 |
abi_ulong arm_r5; |
1006 |
abi_ulong arm_r6; |
1007 |
abi_ulong arm_r7; |
1008 |
abi_ulong arm_r8; |
1009 |
abi_ulong arm_r9; |
1010 |
abi_ulong arm_r10; |
1011 |
abi_ulong arm_fp; |
1012 |
abi_ulong arm_ip; |
1013 |
abi_ulong arm_sp; |
1014 |
abi_ulong arm_lr; |
1015 |
abi_ulong arm_pc; |
1016 |
abi_ulong arm_cpsr; |
1017 |
abi_ulong fault_address; |
1018 |
}; |
1019 |
|
1020 |
struct target_ucontext_v1 {
|
1021 |
abi_ulong tuc_flags; |
1022 |
abi_ulong tuc_link; |
1023 |
target_stack_t tuc_stack; |
1024 |
struct target_sigcontext tuc_mcontext;
|
1025 |
target_sigset_t tuc_sigmask; /* mask last for extensibility */
|
1026 |
}; |
1027 |
|
1028 |
struct target_ucontext_v2 {
|
1029 |
abi_ulong tuc_flags; |
1030 |
abi_ulong tuc_link; |
1031 |
target_stack_t tuc_stack; |
1032 |
struct target_sigcontext tuc_mcontext;
|
1033 |
target_sigset_t tuc_sigmask; /* mask last for extensibility */
|
1034 |
char __unused[128 - sizeof(sigset_t)]; |
1035 |
abi_ulong tuc_regspace[128] __attribute__((__aligned__(8))); |
1036 |
}; |
1037 |
|
1038 |
struct sigframe_v1
|
1039 |
{ |
1040 |
struct target_sigcontext sc;
|
1041 |
abi_ulong extramask[TARGET_NSIG_WORDS-1];
|
1042 |
abi_ulong retcode; |
1043 |
}; |
1044 |
|
1045 |
struct sigframe_v2
|
1046 |
{ |
1047 |
struct target_ucontext_v2 uc;
|
1048 |
abi_ulong retcode; |
1049 |
}; |
1050 |
|
1051 |
struct rt_sigframe_v1
|
1052 |
{ |
1053 |
abi_ulong pinfo; |
1054 |
abi_ulong puc; |
1055 |
struct target_siginfo info;
|
1056 |
struct target_ucontext_v1 uc;
|
1057 |
abi_ulong retcode; |
1058 |
}; |
1059 |
|
1060 |
struct rt_sigframe_v2
|
1061 |
{ |
1062 |
struct target_siginfo info;
|
1063 |
struct target_ucontext_v2 uc;
|
1064 |
abi_ulong retcode; |
1065 |
}; |
1066 |
|
1067 |
#define TARGET_CONFIG_CPU_32 1 |
1068 |
|
1069 |
/*
|
1070 |
* For ARM syscalls, we encode the syscall number into the instruction.
|
1071 |
*/
|
1072 |
#define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE)) |
1073 |
#define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE)) |
1074 |
|
1075 |
/*
|
1076 |
* For Thumb syscalls, we pass the syscall number via r7. We therefore
|
1077 |
* need two 16-bit instructions.
|
1078 |
*/
|
1079 |
#define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn)) |
1080 |
#define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn)) |
1081 |
|
1082 |
static const abi_ulong retcodes[4] = { |
1083 |
SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN, |
1084 |
SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN |
1085 |
}; |
1086 |
|
1087 |
|
1088 |
#define __get_user_error(x,p,e) __get_user(x, p)
|
1089 |
|
1090 |
static inline int valid_user_regs(CPUState *regs) |
1091 |
{ |
1092 |
return 1; |
1093 |
} |
1094 |
|
1095 |
static void |
1096 |
setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/ |
1097 |
CPUState *env, abi_ulong mask) |
1098 |
{ |
1099 |
__put_user(env->regs[0], &sc->arm_r0);
|
1100 |
__put_user(env->regs[1], &sc->arm_r1);
|
1101 |
__put_user(env->regs[2], &sc->arm_r2);
|
1102 |
__put_user(env->regs[3], &sc->arm_r3);
|
1103 |
__put_user(env->regs[4], &sc->arm_r4);
|
1104 |
__put_user(env->regs[5], &sc->arm_r5);
|
1105 |
__put_user(env->regs[6], &sc->arm_r6);
|
1106 |
__put_user(env->regs[7], &sc->arm_r7);
|
1107 |
__put_user(env->regs[8], &sc->arm_r8);
|
1108 |
__put_user(env->regs[9], &sc->arm_r9);
|
1109 |
__put_user(env->regs[10], &sc->arm_r10);
|
1110 |
__put_user(env->regs[11], &sc->arm_fp);
|
1111 |
__put_user(env->regs[12], &sc->arm_ip);
|
1112 |
__put_user(env->regs[13], &sc->arm_sp);
|
1113 |
__put_user(env->regs[14], &sc->arm_lr);
|
1114 |
__put_user(env->regs[15], &sc->arm_pc);
|
1115 |
#ifdef TARGET_CONFIG_CPU_32
|
1116 |
__put_user(cpsr_read(env), &sc->arm_cpsr); |
1117 |
#endif
|
1118 |
|
1119 |
__put_user(/* current->thread.trap_no */ 0, &sc->trap_no); |
1120 |
__put_user(/* current->thread.error_code */ 0, &sc->error_code); |
1121 |
__put_user(/* current->thread.address */ 0, &sc->fault_address); |
1122 |
__put_user(mask, &sc->oldmask); |
1123 |
} |
1124 |
|
1125 |
static inline abi_ulong |
1126 |
get_sigframe(struct target_sigaction *ka, CPUState *regs, int framesize) |
1127 |
{ |
1128 |
unsigned long sp = regs->regs[13]; |
1129 |
|
1130 |
/*
|
1131 |
* This is the X/Open sanctioned signal stack switching.
|
1132 |
*/
|
1133 |
if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp))
|
1134 |
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
1135 |
/*
|
1136 |
* ATPCS B01 mandates 8-byte alignment
|
1137 |
*/
|
1138 |
return (sp - framesize) & ~7; |
1139 |
} |
1140 |
|
1141 |
static int |
1142 |
setup_return(CPUState *env, struct target_sigaction *ka,
|
1143 |
abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr)
|
1144 |
{ |
1145 |
abi_ulong handler = ka->_sa_handler; |
1146 |
abi_ulong retcode; |
1147 |
int thumb = handler & 1; |
1148 |
|
1149 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
1150 |
retcode = ka->sa_restorer; |
1151 |
} else {
|
1152 |
unsigned int idx = thumb; |
1153 |
|
1154 |
if (ka->sa_flags & TARGET_SA_SIGINFO)
|
1155 |
idx += 2;
|
1156 |
|
1157 |
if (__put_user(retcodes[idx], rc))
|
1158 |
return 1; |
1159 |
#if 0
|
1160 |
flush_icache_range((abi_ulong)rc,
|
1161 |
(abi_ulong)(rc + 1));
|
1162 |
#endif
|
1163 |
retcode = rc_addr + thumb; |
1164 |
} |
1165 |
|
1166 |
env->regs[0] = usig;
|
1167 |
env->regs[13] = frame_addr;
|
1168 |
env->regs[14] = retcode;
|
1169 |
env->regs[15] = handler & (thumb ? ~1 : ~3); |
1170 |
env->thumb = thumb; |
1171 |
|
1172 |
#if 0
|
1173 |
#ifdef TARGET_CONFIG_CPU_32
|
1174 |
env->cpsr = cpsr;
|
1175 |
#endif
|
1176 |
#endif
|
1177 |
|
1178 |
return 0; |
1179 |
} |
1180 |
|
1181 |
static void setup_sigframe_v2(struct target_ucontext_v2 *uc, |
1182 |
target_sigset_t *set, CPUState *env) |
1183 |
{ |
1184 |
struct target_sigaltstack stack;
|
1185 |
int i;
|
1186 |
|
1187 |
/* Clear all the bits of the ucontext we don't use. */
|
1188 |
memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext)); |
1189 |
|
1190 |
memset(&stack, 0, sizeof(stack)); |
1191 |
__put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp); |
1192 |
__put_user(target_sigaltstack_used.ss_size, &stack.ss_size); |
1193 |
__put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags); |
1194 |
memcpy(&uc->tuc_stack, &stack, sizeof(stack));
|
1195 |
|
1196 |
setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]);
|
1197 |
/* FIXME: Save coprocessor signal frame. */
|
1198 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
1199 |
__put_user(set->sig[i], &uc->tuc_sigmask.sig[i]); |
1200 |
} |
1201 |
} |
1202 |
|
1203 |
/* compare linux/arch/arm/kernel/signal.c:setup_frame() */
|
1204 |
static void setup_frame_v1(int usig, struct target_sigaction *ka, |
1205 |
target_sigset_t *set, CPUState *regs) |
1206 |
{ |
1207 |
struct sigframe_v1 *frame;
|
1208 |
abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
|
1209 |
int i;
|
1210 |
|
1211 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
1212 |
return;
|
1213 |
|
1214 |
setup_sigcontext(&frame->sc, regs, set->sig[0]);
|
1215 |
|
1216 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
1217 |
if (__put_user(set->sig[i], &frame->extramask[i - 1])) |
1218 |
goto end;
|
1219 |
} |
1220 |
|
1221 |
setup_return(regs, ka, &frame->retcode, frame_addr, usig, |
1222 |
frame_addr + offsetof(struct sigframe_v1, retcode));
|
1223 |
|
1224 |
end:
|
1225 |
unlock_user_struct(frame, frame_addr, 1);
|
1226 |
} |
1227 |
|
1228 |
static void setup_frame_v2(int usig, struct target_sigaction *ka, |
1229 |
target_sigset_t *set, CPUState *regs) |
1230 |
{ |
1231 |
struct sigframe_v2 *frame;
|
1232 |
abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
|
1233 |
|
1234 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
1235 |
return;
|
1236 |
|
1237 |
setup_sigframe_v2(&frame->uc, set, regs); |
1238 |
|
1239 |
setup_return(regs, ka, &frame->retcode, frame_addr, usig, |
1240 |
frame_addr + offsetof(struct sigframe_v2, retcode));
|
1241 |
|
1242 |
unlock_user_struct(frame, frame_addr, 1);
|
1243 |
} |
1244 |
|
1245 |
static void setup_frame(int usig, struct target_sigaction *ka, |
1246 |
target_sigset_t *set, CPUState *regs) |
1247 |
{ |
1248 |
if (get_osversion() >= 0x020612) { |
1249 |
setup_frame_v2(usig, ka, set, regs); |
1250 |
} else {
|
1251 |
setup_frame_v1(usig, ka, set, regs); |
1252 |
} |
1253 |
} |
1254 |
|
1255 |
/* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */
|
1256 |
static void setup_rt_frame_v1(int usig, struct target_sigaction *ka, |
1257 |
target_siginfo_t *info, |
1258 |
target_sigset_t *set, CPUState *env) |
1259 |
{ |
1260 |
struct rt_sigframe_v1 *frame;
|
1261 |
abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
1262 |
struct target_sigaltstack stack;
|
1263 |
int i;
|
1264 |
abi_ulong info_addr, uc_addr; |
1265 |
|
1266 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
1267 |
return /* 1 */; |
1268 |
|
1269 |
info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info);
|
1270 |
__put_user(info_addr, &frame->pinfo); |
1271 |
uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc);
|
1272 |
__put_user(uc_addr, &frame->puc); |
1273 |
copy_siginfo_to_user(&frame->info, info); |
1274 |
|
1275 |
/* Clear all the bits of the ucontext we don't use. */
|
1276 |
memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext)); |
1277 |
|
1278 |
memset(&stack, 0, sizeof(stack)); |
1279 |
__put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp); |
1280 |
__put_user(target_sigaltstack_used.ss_size, &stack.ss_size); |
1281 |
__put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags); |
1282 |
memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
|
1283 |
|
1284 |
setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]);
|
1285 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
1286 |
if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
|
1287 |
goto end;
|
1288 |
} |
1289 |
|
1290 |
setup_return(env, ka, &frame->retcode, frame_addr, usig, |
1291 |
frame_addr + offsetof(struct rt_sigframe_v1, retcode));
|
1292 |
|
1293 |
env->regs[1] = info_addr;
|
1294 |
env->regs[2] = uc_addr;
|
1295 |
|
1296 |
end:
|
1297 |
unlock_user_struct(frame, frame_addr, 1);
|
1298 |
} |
1299 |
|
1300 |
static void setup_rt_frame_v2(int usig, struct target_sigaction *ka, |
1301 |
target_siginfo_t *info, |
1302 |
target_sigset_t *set, CPUState *env) |
1303 |
{ |
1304 |
struct rt_sigframe_v2 *frame;
|
1305 |
abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
1306 |
abi_ulong info_addr, uc_addr; |
1307 |
|
1308 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
1309 |
return /* 1 */; |
1310 |
|
1311 |
info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info);
|
1312 |
uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc);
|
1313 |
copy_siginfo_to_user(&frame->info, info); |
1314 |
|
1315 |
setup_sigframe_v2(&frame->uc, set, env); |
1316 |
|
1317 |
setup_return(env, ka, &frame->retcode, frame_addr, usig, |
1318 |
frame_addr + offsetof(struct rt_sigframe_v2, retcode));
|
1319 |
|
1320 |
env->regs[1] = info_addr;
|
1321 |
env->regs[2] = uc_addr;
|
1322 |
|
1323 |
unlock_user_struct(frame, frame_addr, 1);
|
1324 |
} |
1325 |
|
1326 |
static void setup_rt_frame(int usig, struct target_sigaction *ka, |
1327 |
target_siginfo_t *info, |
1328 |
target_sigset_t *set, CPUState *env) |
1329 |
{ |
1330 |
if (get_osversion() >= 0x020612) { |
1331 |
setup_rt_frame_v2(usig, ka, info, set, env); |
1332 |
} else {
|
1333 |
setup_rt_frame_v1(usig, ka, info, set, env); |
1334 |
} |
1335 |
} |
1336 |
|
1337 |
static int |
1338 |
restore_sigcontext(CPUState *env, struct target_sigcontext *sc)
|
1339 |
{ |
1340 |
int err = 0; |
1341 |
uint32_t cpsr; |
1342 |
|
1343 |
__get_user_error(env->regs[0], &sc->arm_r0, err);
|
1344 |
__get_user_error(env->regs[1], &sc->arm_r1, err);
|
1345 |
__get_user_error(env->regs[2], &sc->arm_r2, err);
|
1346 |
__get_user_error(env->regs[3], &sc->arm_r3, err);
|
1347 |
__get_user_error(env->regs[4], &sc->arm_r4, err);
|
1348 |
__get_user_error(env->regs[5], &sc->arm_r5, err);
|
1349 |
__get_user_error(env->regs[6], &sc->arm_r6, err);
|
1350 |
__get_user_error(env->regs[7], &sc->arm_r7, err);
|
1351 |
__get_user_error(env->regs[8], &sc->arm_r8, err);
|
1352 |
__get_user_error(env->regs[9], &sc->arm_r9, err);
|
1353 |
__get_user_error(env->regs[10], &sc->arm_r10, err);
|
1354 |
__get_user_error(env->regs[11], &sc->arm_fp, err);
|
1355 |
__get_user_error(env->regs[12], &sc->arm_ip, err);
|
1356 |
__get_user_error(env->regs[13], &sc->arm_sp, err);
|
1357 |
__get_user_error(env->regs[14], &sc->arm_lr, err);
|
1358 |
__get_user_error(env->regs[15], &sc->arm_pc, err);
|
1359 |
#ifdef TARGET_CONFIG_CPU_32
|
1360 |
__get_user_error(cpsr, &sc->arm_cpsr, err); |
1361 |
cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC); |
1362 |
#endif
|
1363 |
|
1364 |
err |= !valid_user_regs(env); |
1365 |
|
1366 |
return err;
|
1367 |
} |
1368 |
|
1369 |
long do_sigreturn_v1(CPUState *env)
|
1370 |
{ |
1371 |
abi_ulong frame_addr; |
1372 |
struct sigframe_v1 *frame;
|
1373 |
target_sigset_t set; |
1374 |
sigset_t host_set; |
1375 |
int i;
|
1376 |
|
1377 |
/*
|
1378 |
* Since we stacked the signal on a 64-bit boundary,
|
1379 |
* then 'sp' should be word aligned here. If it's
|
1380 |
* not, then the user is trying to mess with us.
|
1381 |
*/
|
1382 |
if (env->regs[13] & 7) |
1383 |
goto badframe;
|
1384 |
|
1385 |
frame_addr = env->regs[13];
|
1386 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
1387 |
goto badframe;
|
1388 |
|
1389 |
if (__get_user(set.sig[0], &frame->sc.oldmask)) |
1390 |
goto badframe;
|
1391 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
1392 |
if (__get_user(set.sig[i], &frame->extramask[i - 1])) |
1393 |
goto badframe;
|
1394 |
} |
1395 |
|
1396 |
target_to_host_sigset_internal(&host_set, &set); |
1397 |
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
1398 |
|
1399 |
if (restore_sigcontext(env, &frame->sc))
|
1400 |
goto badframe;
|
1401 |
|
1402 |
#if 0
|
1403 |
/* Send SIGTRAP if we're single-stepping */
|
1404 |
if (ptrace_cancel_bpt(current))
|
1405 |
send_sig(SIGTRAP, current, 1);
|
1406 |
#endif
|
1407 |
unlock_user_struct(frame, frame_addr, 0);
|
1408 |
return env->regs[0]; |
1409 |
|
1410 |
badframe:
|
1411 |
unlock_user_struct(frame, frame_addr, 0);
|
1412 |
force_sig(SIGSEGV /* , current */);
|
1413 |
return 0; |
1414 |
} |
1415 |
|
1416 |
static int do_sigframe_return_v2(CPUState *env, target_ulong frame_addr, |
1417 |
struct target_ucontext_v2 *uc)
|
1418 |
{ |
1419 |
sigset_t host_set; |
1420 |
|
1421 |
target_to_host_sigset(&host_set, &uc->tuc_sigmask); |
1422 |
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
1423 |
|
1424 |
if (restore_sigcontext(env, &uc->tuc_mcontext))
|
1425 |
return 1; |
1426 |
|
1427 |
if (do_sigaltstack(frame_addr + offsetof(struct target_ucontext_v2, tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) |
1428 |
return 1; |
1429 |
|
1430 |
#if 0
|
1431 |
/* Send SIGTRAP if we're single-stepping */
|
1432 |
if (ptrace_cancel_bpt(current))
|
1433 |
send_sig(SIGTRAP, current, 1);
|
1434 |
#endif
|
1435 |
|
1436 |
return 0; |
1437 |
} |
1438 |
|
1439 |
long do_sigreturn_v2(CPUState *env)
|
1440 |
{ |
1441 |
abi_ulong frame_addr; |
1442 |
struct sigframe_v2 *frame;
|
1443 |
|
1444 |
/*
|
1445 |
* Since we stacked the signal on a 64-bit boundary,
|
1446 |
* then 'sp' should be word aligned here. If it's
|
1447 |
* not, then the user is trying to mess with us.
|
1448 |
*/
|
1449 |
if (env->regs[13] & 7) |
1450 |
goto badframe;
|
1451 |
|
1452 |
frame_addr = env->regs[13];
|
1453 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
1454 |
goto badframe;
|
1455 |
|
1456 |
if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
|
1457 |
goto badframe;
|
1458 |
|
1459 |
unlock_user_struct(frame, frame_addr, 0);
|
1460 |
return env->regs[0]; |
1461 |
|
1462 |
badframe:
|
1463 |
unlock_user_struct(frame, frame_addr, 0);
|
1464 |
force_sig(SIGSEGV /* , current */);
|
1465 |
return 0; |
1466 |
} |
1467 |
|
1468 |
long do_sigreturn(CPUState *env)
|
1469 |
{ |
1470 |
if (get_osversion() >= 0x020612) { |
1471 |
return do_sigreturn_v2(env);
|
1472 |
} else {
|
1473 |
return do_sigreturn_v1(env);
|
1474 |
} |
1475 |
} |
1476 |
|
1477 |
long do_rt_sigreturn_v1(CPUState *env)
|
1478 |
{ |
1479 |
abi_ulong frame_addr; |
1480 |
struct rt_sigframe_v1 *frame;
|
1481 |
sigset_t host_set; |
1482 |
|
1483 |
/*
|
1484 |
* Since we stacked the signal on a 64-bit boundary,
|
1485 |
* then 'sp' should be word aligned here. If it's
|
1486 |
* not, then the user is trying to mess with us.
|
1487 |
*/
|
1488 |
if (env->regs[13] & 7) |
1489 |
goto badframe;
|
1490 |
|
1491 |
frame_addr = env->regs[13];
|
1492 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
1493 |
goto badframe;
|
1494 |
|
1495 |
target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask); |
1496 |
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
1497 |
|
1498 |
if (restore_sigcontext(env, &frame->uc.tuc_mcontext))
|
1499 |
goto badframe;
|
1500 |
|
1501 |
if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) |
1502 |
goto badframe;
|
1503 |
|
1504 |
#if 0
|
1505 |
/* Send SIGTRAP if we're single-stepping */
|
1506 |
if (ptrace_cancel_bpt(current))
|
1507 |
send_sig(SIGTRAP, current, 1);
|
1508 |
#endif
|
1509 |
unlock_user_struct(frame, frame_addr, 0);
|
1510 |
return env->regs[0]; |
1511 |
|
1512 |
badframe:
|
1513 |
unlock_user_struct(frame, frame_addr, 0);
|
1514 |
force_sig(SIGSEGV /* , current */);
|
1515 |
return 0; |
1516 |
} |
1517 |
|
1518 |
long do_rt_sigreturn_v2(CPUState *env)
|
1519 |
{ |
1520 |
abi_ulong frame_addr; |
1521 |
struct rt_sigframe_v2 *frame;
|
1522 |
|
1523 |
/*
|
1524 |
* Since we stacked the signal on a 64-bit boundary,
|
1525 |
* then 'sp' should be word aligned here. If it's
|
1526 |
* not, then the user is trying to mess with us.
|
1527 |
*/
|
1528 |
if (env->regs[13] & 7) |
1529 |
goto badframe;
|
1530 |
|
1531 |
frame_addr = env->regs[13];
|
1532 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
1533 |
goto badframe;
|
1534 |
|
1535 |
if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
|
1536 |
goto badframe;
|
1537 |
|
1538 |
unlock_user_struct(frame, frame_addr, 0);
|
1539 |
return env->regs[0]; |
1540 |
|
1541 |
badframe:
|
1542 |
unlock_user_struct(frame, frame_addr, 0);
|
1543 |
force_sig(SIGSEGV /* , current */);
|
1544 |
return 0; |
1545 |
} |
1546 |
|
1547 |
long do_rt_sigreturn(CPUState *env)
|
1548 |
{ |
1549 |
if (get_osversion() >= 0x020612) { |
1550 |
return do_rt_sigreturn_v2(env);
|
1551 |
} else {
|
1552 |
return do_rt_sigreturn_v1(env);
|
1553 |
} |
1554 |
} |
1555 |
|
1556 |
#elif defined(TARGET_SPARC)
|
1557 |
|
1558 |
#define __SUNOS_MAXWIN 31 |
1559 |
|
1560 |
/* This is what SunOS does, so shall I. */
|
1561 |
struct target_sigcontext {
|
1562 |
abi_ulong sigc_onstack; /* state to restore */
|
1563 |
|
1564 |
abi_ulong sigc_mask; /* sigmask to restore */
|
1565 |
abi_ulong sigc_sp; /* stack pointer */
|
1566 |
abi_ulong sigc_pc; /* program counter */
|
1567 |
abi_ulong sigc_npc; /* next program counter */
|
1568 |
abi_ulong sigc_psr; /* for condition codes etc */
|
1569 |
abi_ulong sigc_g1; /* User uses these two registers */
|
1570 |
abi_ulong sigc_o0; /* within the trampoline code. */
|
1571 |
|
1572 |
/* Now comes information regarding the users window set
|
1573 |
* at the time of the signal.
|
1574 |
*/
|
1575 |
abi_ulong sigc_oswins; /* outstanding windows */
|
1576 |
|
1577 |
/* stack ptrs for each regwin buf */
|
1578 |
char *sigc_spbuf[__SUNOS_MAXWIN];
|
1579 |
|
1580 |
/* Windows to restore after signal */
|
1581 |
struct {
|
1582 |
abi_ulong locals[8];
|
1583 |
abi_ulong ins[8];
|
1584 |
} sigc_wbuf[__SUNOS_MAXWIN]; |
1585 |
}; |
1586 |
/* A Sparc stack frame */
|
1587 |
struct sparc_stackf {
|
1588 |
abi_ulong locals[8];
|
1589 |
abi_ulong ins[6];
|
1590 |
struct sparc_stackf *fp;
|
1591 |
abi_ulong callers_pc; |
1592 |
char *structptr;
|
1593 |
abi_ulong xargs[6];
|
1594 |
abi_ulong xxargs[1];
|
1595 |
}; |
1596 |
|
1597 |
typedef struct { |
1598 |
struct {
|
1599 |
abi_ulong psr; |
1600 |
abi_ulong pc; |
1601 |
abi_ulong npc; |
1602 |
abi_ulong y; |
1603 |
abi_ulong u_regs[16]; /* globals and ins */ |
1604 |
} si_regs; |
1605 |
int si_mask;
|
1606 |
} __siginfo_t; |
1607 |
|
1608 |
typedef struct { |
1609 |
unsigned long si_float_regs [32]; |
1610 |
unsigned long si_fsr; |
1611 |
unsigned long si_fpqdepth; |
1612 |
struct {
|
1613 |
unsigned long *insn_addr; |
1614 |
unsigned long insn; |
1615 |
} si_fpqueue [16];
|
1616 |
} qemu_siginfo_fpu_t; |
1617 |
|
1618 |
|
1619 |
struct target_signal_frame {
|
1620 |
struct sparc_stackf ss;
|
1621 |
__siginfo_t info; |
1622 |
abi_ulong fpu_save; |
1623 |
abi_ulong insns[2] __attribute__ ((aligned (8))); |
1624 |
abi_ulong extramask[TARGET_NSIG_WORDS - 1];
|
1625 |
abi_ulong extra_size; /* Should be 0 */
|
1626 |
qemu_siginfo_fpu_t fpu_state; |
1627 |
}; |
1628 |
struct target_rt_signal_frame {
|
1629 |
struct sparc_stackf ss;
|
1630 |
siginfo_t info; |
1631 |
abi_ulong regs[20];
|
1632 |
sigset_t mask; |
1633 |
abi_ulong fpu_save; |
1634 |
unsigned int insns[2]; |
1635 |
stack_t stack; |
1636 |
unsigned int extra_size; /* Should be 0 */ |
1637 |
qemu_siginfo_fpu_t fpu_state; |
1638 |
}; |
1639 |
|
1640 |
#define UREG_O0 16 |
1641 |
#define UREG_O6 22 |
1642 |
#define UREG_I0 0 |
1643 |
#define UREG_I1 1 |
1644 |
#define UREG_I2 2 |
1645 |
#define UREG_I3 3 |
1646 |
#define UREG_I4 4 |
1647 |
#define UREG_I5 5 |
1648 |
#define UREG_I6 6 |
1649 |
#define UREG_I7 7 |
1650 |
#define UREG_L0 8 |
1651 |
#define UREG_FP UREG_I6
|
1652 |
#define UREG_SP UREG_O6
|
1653 |
|
1654 |
static inline abi_ulong get_sigframe(struct target_sigaction *sa, |
1655 |
CPUState *env, unsigned long framesize) |
1656 |
{ |
1657 |
abi_ulong sp; |
1658 |
|
1659 |
sp = env->regwptr[UREG_FP]; |
1660 |
|
1661 |
/* This is the X/Open sanctioned signal stack switching. */
|
1662 |
if (sa->sa_flags & TARGET_SA_ONSTACK) {
|
1663 |
if (!on_sig_stack(sp)
|
1664 |
&& !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7))
|
1665 |
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
1666 |
} |
1667 |
return sp - framesize;
|
1668 |
} |
1669 |
|
1670 |
static int |
1671 |
setup___siginfo(__siginfo_t *si, CPUState *env, abi_ulong mask) |
1672 |
{ |
1673 |
int err = 0, i; |
1674 |
|
1675 |
err |= __put_user(env->psr, &si->si_regs.psr); |
1676 |
err |= __put_user(env->pc, &si->si_regs.pc); |
1677 |
err |= __put_user(env->npc, &si->si_regs.npc); |
1678 |
err |= __put_user(env->y, &si->si_regs.y); |
1679 |
for (i=0; i < 8; i++) { |
1680 |
err |= __put_user(env->gregs[i], &si->si_regs.u_regs[i]); |
1681 |
} |
1682 |
for (i=0; i < 8; i++) { |
1683 |
err |= __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]);
|
1684 |
} |
1685 |
err |= __put_user(mask, &si->si_mask); |
1686 |
return err;
|
1687 |
} |
1688 |
|
1689 |
#if 0
|
1690 |
static int
|
1691 |
setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
|
1692 |
CPUState *env, unsigned long mask)
|
1693 |
{
|
1694 |
int err = 0;
|
1695 |
|
1696 |
err |= __put_user(mask, &sc->sigc_mask);
|
1697 |
err |= __put_user(env->regwptr[UREG_SP], &sc->sigc_sp);
|
1698 |
err |= __put_user(env->pc, &sc->sigc_pc);
|
1699 |
err |= __put_user(env->npc, &sc->sigc_npc);
|
1700 |
err |= __put_user(env->psr, &sc->sigc_psr);
|
1701 |
err |= __put_user(env->gregs[1], &sc->sigc_g1);
|
1702 |
err |= __put_user(env->regwptr[UREG_O0], &sc->sigc_o0);
|
1703 |
|
1704 |
return err;
|
1705 |
}
|
1706 |
#endif
|
1707 |
#define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7))) |
1708 |
|
1709 |
static void setup_frame(int sig, struct target_sigaction *ka, |
1710 |
target_sigset_t *set, CPUState *env) |
1711 |
{ |
1712 |
abi_ulong sf_addr; |
1713 |
struct target_signal_frame *sf;
|
1714 |
int sigframe_size, err, i;
|
1715 |
|
1716 |
/* 1. Make sure everything is clean */
|
1717 |
//synchronize_user_stack();
|
1718 |
|
1719 |
sigframe_size = NF_ALIGNEDSZ; |
1720 |
sf_addr = get_sigframe(ka, env, sigframe_size); |
1721 |
|
1722 |
sf = lock_user(VERIFY_WRITE, sf_addr, |
1723 |
sizeof(struct target_signal_frame), 0); |
1724 |
if (!sf)
|
1725 |
goto sigsegv;
|
1726 |
|
1727 |
//fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
|
1728 |
#if 0
|
1729 |
if (invalid_frame_pointer(sf, sigframe_size))
|
1730 |
goto sigill_and_return;
|
1731 |
#endif
|
1732 |
/* 2. Save the current process state */
|
1733 |
err = setup___siginfo(&sf->info, env, set->sig[0]);
|
1734 |
err |= __put_user(0, &sf->extra_size);
|
1735 |
|
1736 |
//err |= save_fpu_state(regs, &sf->fpu_state);
|
1737 |
//err |= __put_user(&sf->fpu_state, &sf->fpu_save);
|
1738 |
|
1739 |
err |= __put_user(set->sig[0], &sf->info.si_mask);
|
1740 |
for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) { |
1741 |
err |= __put_user(set->sig[i + 1], &sf->extramask[i]);
|
1742 |
} |
1743 |
|
1744 |
for (i = 0; i < 8; i++) { |
1745 |
err |= __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]); |
1746 |
} |
1747 |
for (i = 0; i < 8; i++) { |
1748 |
err |= __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]); |
1749 |
} |
1750 |
if (err)
|
1751 |
goto sigsegv;
|
1752 |
|
1753 |
/* 3. signal handler back-trampoline and parameters */
|
1754 |
env->regwptr[UREG_FP] = sf_addr; |
1755 |
env->regwptr[UREG_I0] = sig; |
1756 |
env->regwptr[UREG_I1] = sf_addr + |
1757 |
offsetof(struct target_signal_frame, info);
|
1758 |
env->regwptr[UREG_I2] = sf_addr + |
1759 |
offsetof(struct target_signal_frame, info);
|
1760 |
|
1761 |
/* 4. signal handler */
|
1762 |
env->pc = ka->_sa_handler; |
1763 |
env->npc = (env->pc + 4);
|
1764 |
/* 5. return to kernel instructions */
|
1765 |
if (ka->sa_restorer)
|
1766 |
env->regwptr[UREG_I7] = ka->sa_restorer; |
1767 |
else {
|
1768 |
uint32_t val32; |
1769 |
|
1770 |
env->regwptr[UREG_I7] = sf_addr + |
1771 |
offsetof(struct target_signal_frame, insns) - 2 * 4; |
1772 |
|
1773 |
/* mov __NR_sigreturn, %g1 */
|
1774 |
val32 = 0x821020d8;
|
1775 |
err |= __put_user(val32, &sf->insns[0]);
|
1776 |
|
1777 |
/* t 0x10 */
|
1778 |
val32 = 0x91d02010;
|
1779 |
err |= __put_user(val32, &sf->insns[1]);
|
1780 |
if (err)
|
1781 |
goto sigsegv;
|
1782 |
|
1783 |
/* Flush instruction space. */
|
1784 |
//flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
|
1785 |
// tb_flush(env);
|
1786 |
} |
1787 |
unlock_user(sf, sf_addr, sizeof(struct target_signal_frame)); |
1788 |
return;
|
1789 |
#if 0
|
1790 |
sigill_and_return:
|
1791 |
force_sig(TARGET_SIGILL);
|
1792 |
#endif
|
1793 |
sigsegv:
|
1794 |
//fprintf(stderr, "force_sig\n");
|
1795 |
unlock_user(sf, sf_addr, sizeof(struct target_signal_frame)); |
1796 |
force_sig(TARGET_SIGSEGV); |
1797 |
} |
1798 |
static inline int |
1799 |
restore_fpu_state(CPUState *env, qemu_siginfo_fpu_t *fpu) |
1800 |
{ |
1801 |
int err;
|
1802 |
#if 0
|
1803 |
#ifdef CONFIG_SMP
|
1804 |
if (current->flags & PF_USEDFPU)
|
1805 |
regs->psr &= ~PSR_EF;
|
1806 |
#else
|
1807 |
if (current == last_task_used_math) {
|
1808 |
last_task_used_math = 0;
|
1809 |
regs->psr &= ~PSR_EF; |
1810 |
} |
1811 |
#endif
|
1812 |
current->used_math = 1;
|
1813 |
current->flags &= ~PF_USEDFPU; |
1814 |
#endif
|
1815 |
#if 0
|
1816 |
if (verify_area (VERIFY_READ, fpu, sizeof(*fpu)))
|
1817 |
return -EFAULT;
|
1818 |
#endif
|
1819 |
|
1820 |
#if 0
|
1821 |
/* XXX: incorrect */
|
1822 |
err = __copy_from_user(&env->fpr[0], &fpu->si_float_regs[0],
|
1823 |
(sizeof(unsigned long) * 32));
|
1824 |
#endif
|
1825 |
err |= __get_user(env->fsr, &fpu->si_fsr); |
1826 |
#if 0
|
1827 |
err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
|
1828 |
if (current->thread.fpqdepth != 0)
|
1829 |
err |= __copy_from_user(¤t->thread.fpqueue[0],
|
1830 |
&fpu->si_fpqueue[0],
|
1831 |
((sizeof(unsigned long) +
|
1832 |
(sizeof(unsigned long *)))*16));
|
1833 |
#endif
|
1834 |
return err;
|
1835 |
} |
1836 |
|
1837 |
|
1838 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
1839 |
target_siginfo_t *info, |
1840 |
target_sigset_t *set, CPUState *env) |
1841 |
{ |
1842 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
1843 |
} |
1844 |
|
1845 |
long do_sigreturn(CPUState *env)
|
1846 |
{ |
1847 |
abi_ulong sf_addr; |
1848 |
struct target_signal_frame *sf;
|
1849 |
uint32_t up_psr, pc, npc; |
1850 |
target_sigset_t set; |
1851 |
sigset_t host_set; |
1852 |
abi_ulong fpu_save_addr; |
1853 |
int err, i;
|
1854 |
|
1855 |
sf_addr = env->regwptr[UREG_FP]; |
1856 |
if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1)) |
1857 |
goto segv_and_exit;
|
1858 |
#if 0
|
1859 |
fprintf(stderr, "sigreturn\n");
|
1860 |
fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
|
1861 |
#endif
|
1862 |
//cpu_dump_state(env, stderr, fprintf, 0);
|
1863 |
|
1864 |
/* 1. Make sure we are not getting garbage from the user */
|
1865 |
|
1866 |
if (sf_addr & 3) |
1867 |
goto segv_and_exit;
|
1868 |
|
1869 |
err = __get_user(pc, &sf->info.si_regs.pc); |
1870 |
err |= __get_user(npc, &sf->info.si_regs.npc); |
1871 |
|
1872 |
if ((pc | npc) & 3) |
1873 |
goto segv_and_exit;
|
1874 |
|
1875 |
/* 2. Restore the state */
|
1876 |
err |= __get_user(up_psr, &sf->info.si_regs.psr); |
1877 |
|
1878 |
/* User can only change condition codes and FPU enabling in %psr. */
|
1879 |
env->psr = (up_psr & (PSR_ICC /* | PSR_EF */))
|
1880 |
| (env->psr & ~(PSR_ICC /* | PSR_EF */));
|
1881 |
|
1882 |
env->pc = pc; |
1883 |
env->npc = npc; |
1884 |
err |= __get_user(env->y, &sf->info.si_regs.y); |
1885 |
for (i=0; i < 8; i++) { |
1886 |
err |= __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]); |
1887 |
} |
1888 |
for (i=0; i < 8; i++) { |
1889 |
err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]);
|
1890 |
} |
1891 |
|
1892 |
err |= __get_user(fpu_save_addr, &sf->fpu_save); |
1893 |
|
1894 |
//if (fpu_save)
|
1895 |
// err |= restore_fpu_state(env, fpu_save);
|
1896 |
|
1897 |
/* This is pretty much atomic, no amount locking would prevent
|
1898 |
* the races which exist anyways.
|
1899 |
*/
|
1900 |
err |= __get_user(set.sig[0], &sf->info.si_mask);
|
1901 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
1902 |
err |= (__get_user(set.sig[i], &sf->extramask[i - 1]));
|
1903 |
} |
1904 |
|
1905 |
target_to_host_sigset_internal(&host_set, &set); |
1906 |
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
1907 |
|
1908 |
if (err)
|
1909 |
goto segv_and_exit;
|
1910 |
unlock_user_struct(sf, sf_addr, 0);
|
1911 |
return env->regwptr[0]; |
1912 |
|
1913 |
segv_and_exit:
|
1914 |
unlock_user_struct(sf, sf_addr, 0);
|
1915 |
force_sig(TARGET_SIGSEGV); |
1916 |
} |
1917 |
|
1918 |
long do_rt_sigreturn(CPUState *env)
|
1919 |
{ |
1920 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
1921 |
return -TARGET_ENOSYS;
|
1922 |
} |
1923 |
|
1924 |
#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
|
1925 |
#define MC_TSTATE 0 |
1926 |
#define MC_PC 1 |
1927 |
#define MC_NPC 2 |
1928 |
#define MC_Y 3 |
1929 |
#define MC_G1 4 |
1930 |
#define MC_G2 5 |
1931 |
#define MC_G3 6 |
1932 |
#define MC_G4 7 |
1933 |
#define MC_G5 8 |
1934 |
#define MC_G6 9 |
1935 |
#define MC_G7 10 |
1936 |
#define MC_O0 11 |
1937 |
#define MC_O1 12 |
1938 |
#define MC_O2 13 |
1939 |
#define MC_O3 14 |
1940 |
#define MC_O4 15 |
1941 |
#define MC_O5 16 |
1942 |
#define MC_O6 17 |
1943 |
#define MC_O7 18 |
1944 |
#define MC_NGREG 19 |
1945 |
|
1946 |
typedef abi_ulong target_mc_greg_t;
|
1947 |
typedef target_mc_greg_t target_mc_gregset_t[MC_NGREG];
|
1948 |
|
1949 |
struct target_mc_fq {
|
1950 |
abi_ulong *mcfq_addr; |
1951 |
uint32_t mcfq_insn; |
1952 |
}; |
1953 |
|
1954 |
struct target_mc_fpu {
|
1955 |
union {
|
1956 |
uint32_t sregs[32];
|
1957 |
uint64_t dregs[32];
|
1958 |
//uint128_t qregs[16];
|
1959 |
} mcfpu_fregs; |
1960 |
abi_ulong mcfpu_fsr; |
1961 |
abi_ulong mcfpu_fprs; |
1962 |
abi_ulong mcfpu_gsr; |
1963 |
struct target_mc_fq *mcfpu_fq;
|
1964 |
unsigned char mcfpu_qcnt; |
1965 |
unsigned char mcfpu_qentsz; |
1966 |
unsigned char mcfpu_enab; |
1967 |
}; |
1968 |
typedef struct target_mc_fpu target_mc_fpu_t; |
1969 |
|
1970 |
typedef struct { |
1971 |
target_mc_gregset_t mc_gregs; |
1972 |
target_mc_greg_t mc_fp; |
1973 |
target_mc_greg_t mc_i7; |
1974 |
target_mc_fpu_t mc_fpregs; |
1975 |
} target_mcontext_t; |
1976 |
|
1977 |
struct target_ucontext {
|
1978 |
struct target_ucontext *uc_link;
|
1979 |
abi_ulong uc_flags; |
1980 |
target_sigset_t uc_sigmask; |
1981 |
target_mcontext_t uc_mcontext; |
1982 |
}; |
1983 |
|
1984 |
/* A V9 register window */
|
1985 |
struct target_reg_window {
|
1986 |
abi_ulong locals[8];
|
1987 |
abi_ulong ins[8];
|
1988 |
}; |
1989 |
|
1990 |
#define TARGET_STACK_BIAS 2047 |
1991 |
|
1992 |
/* {set, get}context() needed for 64-bit SparcLinux userland. */
|
1993 |
void sparc64_set_context(CPUSPARCState *env)
|
1994 |
{ |
1995 |
abi_ulong ucp_addr; |
1996 |
struct target_ucontext *ucp;
|
1997 |
target_mc_gregset_t *grp; |
1998 |
abi_ulong pc, npc, tstate; |
1999 |
abi_ulong fp, i7, w_addr; |
2000 |
unsigned char fenab; |
2001 |
int err;
|
2002 |
unsigned int i; |
2003 |
|
2004 |
ucp_addr = env->regwptr[UREG_I0]; |
2005 |
if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1)) |
2006 |
goto do_sigsegv;
|
2007 |
grp = &ucp->uc_mcontext.mc_gregs; |
2008 |
err = __get_user(pc, &((*grp)[MC_PC])); |
2009 |
err |= __get_user(npc, &((*grp)[MC_NPC])); |
2010 |
if (err || ((pc | npc) & 3)) |
2011 |
goto do_sigsegv;
|
2012 |
if (env->regwptr[UREG_I1]) {
|
2013 |
target_sigset_t target_set; |
2014 |
sigset_t set; |
2015 |
|
2016 |
if (TARGET_NSIG_WORDS == 1) { |
2017 |
if (__get_user(target_set.sig[0], &ucp->uc_sigmask.sig[0])) |
2018 |
goto do_sigsegv;
|
2019 |
} else {
|
2020 |
abi_ulong *src, *dst; |
2021 |
src = ucp->uc_sigmask.sig; |
2022 |
dst = target_set.sig; |
2023 |
for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong); |
2024 |
i++, dst++, src++) |
2025 |
err |= __get_user(*dst, src); |
2026 |
if (err)
|
2027 |
goto do_sigsegv;
|
2028 |
} |
2029 |
target_to_host_sigset_internal(&set, &target_set); |
2030 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
2031 |
} |
2032 |
env->pc = pc; |
2033 |
env->npc = npc; |
2034 |
err |= __get_user(env->y, &((*grp)[MC_Y])); |
2035 |
err |= __get_user(tstate, &((*grp)[MC_TSTATE])); |
2036 |
env->asi = (tstate >> 24) & 0xff; |
2037 |
PUT_CCR(env, tstate >> 32);
|
2038 |
PUT_CWP64(env, tstate & 0x1f);
|
2039 |
err |= __get_user(env->gregs[1], (&(*grp)[MC_G1]));
|
2040 |
err |= __get_user(env->gregs[2], (&(*grp)[MC_G2]));
|
2041 |
err |= __get_user(env->gregs[3], (&(*grp)[MC_G3]));
|
2042 |
err |= __get_user(env->gregs[4], (&(*grp)[MC_G4]));
|
2043 |
err |= __get_user(env->gregs[5], (&(*grp)[MC_G5]));
|
2044 |
err |= __get_user(env->gregs[6], (&(*grp)[MC_G6]));
|
2045 |
err |= __get_user(env->gregs[7], (&(*grp)[MC_G7]));
|
2046 |
err |= __get_user(env->regwptr[UREG_I0], (&(*grp)[MC_O0])); |
2047 |
err |= __get_user(env->regwptr[UREG_I1], (&(*grp)[MC_O1])); |
2048 |
err |= __get_user(env->regwptr[UREG_I2], (&(*grp)[MC_O2])); |
2049 |
err |= __get_user(env->regwptr[UREG_I3], (&(*grp)[MC_O3])); |
2050 |
err |= __get_user(env->regwptr[UREG_I4], (&(*grp)[MC_O4])); |
2051 |
err |= __get_user(env->regwptr[UREG_I5], (&(*grp)[MC_O5])); |
2052 |
err |= __get_user(env->regwptr[UREG_I6], (&(*grp)[MC_O6])); |
2053 |
err |= __get_user(env->regwptr[UREG_I7], (&(*grp)[MC_O7])); |
2054 |
|
2055 |
err |= __get_user(fp, &(ucp->uc_mcontext.mc_fp)); |
2056 |
err |= __get_user(i7, &(ucp->uc_mcontext.mc_i7)); |
2057 |
|
2058 |
w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6]; |
2059 |
if (put_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]), |
2060 |
abi_ulong) != 0)
|
2061 |
goto do_sigsegv;
|
2062 |
if (put_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]), |
2063 |
abi_ulong) != 0)
|
2064 |
goto do_sigsegv;
|
2065 |
err |= __get_user(fenab, &(ucp->uc_mcontext.mc_fpregs.mcfpu_enab)); |
2066 |
err |= __get_user(env->fprs, &(ucp->uc_mcontext.mc_fpregs.mcfpu_fprs)); |
2067 |
{ |
2068 |
uint32_t *src, *dst; |
2069 |
src = ucp->uc_mcontext.mc_fpregs.mcfpu_fregs.sregs; |
2070 |
dst = env->fpr; |
2071 |
/* XXX: check that the CPU storage is the same as user context */
|
2072 |
for (i = 0; i < 64; i++, dst++, src++) |
2073 |
err |= __get_user(*dst, src); |
2074 |
} |
2075 |
err |= __get_user(env->fsr, |
2076 |
&(ucp->uc_mcontext.mc_fpregs.mcfpu_fsr)); |
2077 |
err |= __get_user(env->gsr, |
2078 |
&(ucp->uc_mcontext.mc_fpregs.mcfpu_gsr)); |
2079 |
if (err)
|
2080 |
goto do_sigsegv;
|
2081 |
unlock_user_struct(ucp, ucp_addr, 0);
|
2082 |
return;
|
2083 |
do_sigsegv:
|
2084 |
unlock_user_struct(ucp, ucp_addr, 0);
|
2085 |
force_sig(SIGSEGV); |
2086 |
} |
2087 |
|
2088 |
void sparc64_get_context(CPUSPARCState *env)
|
2089 |
{ |
2090 |
abi_ulong ucp_addr; |
2091 |
struct target_ucontext *ucp;
|
2092 |
target_mc_gregset_t *grp; |
2093 |
target_mcontext_t *mcp; |
2094 |
abi_ulong fp, i7, w_addr; |
2095 |
int err;
|
2096 |
unsigned int i; |
2097 |
target_sigset_t target_set; |
2098 |
sigset_t set; |
2099 |
|
2100 |
ucp_addr = env->regwptr[UREG_I0]; |
2101 |
if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0)) |
2102 |
goto do_sigsegv;
|
2103 |
|
2104 |
mcp = &ucp->uc_mcontext; |
2105 |
grp = &mcp->mc_gregs; |
2106 |
|
2107 |
/* Skip over the trap instruction, first. */
|
2108 |
env->pc = env->npc; |
2109 |
env->npc += 4;
|
2110 |
|
2111 |
err = 0;
|
2112 |
|
2113 |
sigprocmask(0, NULL, &set); |
2114 |
host_to_target_sigset_internal(&target_set, &set); |
2115 |
if (TARGET_NSIG_WORDS == 1) { |
2116 |
err |= __put_user(target_set.sig[0],
|
2117 |
(abi_ulong *)&ucp->uc_sigmask); |
2118 |
} else {
|
2119 |
abi_ulong *src, *dst; |
2120 |
src = target_set.sig; |
2121 |
dst = ucp->uc_sigmask.sig; |
2122 |
for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong); |
2123 |
i++, dst++, src++) |
2124 |
err |= __put_user(*src, dst); |
2125 |
if (err)
|
2126 |
goto do_sigsegv;
|
2127 |
} |
2128 |
|
2129 |
/* XXX: tstate must be saved properly */
|
2130 |
// err |= __put_user(env->tstate, &((*grp)[MC_TSTATE]));
|
2131 |
err |= __put_user(env->pc, &((*grp)[MC_PC])); |
2132 |
err |= __put_user(env->npc, &((*grp)[MC_NPC])); |
2133 |
err |= __put_user(env->y, &((*grp)[MC_Y])); |
2134 |
err |= __put_user(env->gregs[1], &((*grp)[MC_G1]));
|
2135 |
err |= __put_user(env->gregs[2], &((*grp)[MC_G2]));
|
2136 |
err |= __put_user(env->gregs[3], &((*grp)[MC_G3]));
|
2137 |
err |= __put_user(env->gregs[4], &((*grp)[MC_G4]));
|
2138 |
err |= __put_user(env->gregs[5], &((*grp)[MC_G5]));
|
2139 |
err |= __put_user(env->gregs[6], &((*grp)[MC_G6]));
|
2140 |
err |= __put_user(env->gregs[7], &((*grp)[MC_G7]));
|
2141 |
err |= __put_user(env->regwptr[UREG_I0], &((*grp)[MC_O0])); |
2142 |
err |= __put_user(env->regwptr[UREG_I1], &((*grp)[MC_O1])); |
2143 |
err |= __put_user(env->regwptr[UREG_I2], &((*grp)[MC_O2])); |
2144 |
err |= __put_user(env->regwptr[UREG_I3], &((*grp)[MC_O3])); |
2145 |
err |= __put_user(env->regwptr[UREG_I4], &((*grp)[MC_O4])); |
2146 |
err |= __put_user(env->regwptr[UREG_I5], &((*grp)[MC_O5])); |
2147 |
err |= __put_user(env->regwptr[UREG_I6], &((*grp)[MC_O6])); |
2148 |
err |= __put_user(env->regwptr[UREG_I7], &((*grp)[MC_O7])); |
2149 |
|
2150 |
w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6]; |
2151 |
fp = i7 = 0;
|
2152 |
if (get_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]), |
2153 |
abi_ulong) != 0)
|
2154 |
goto do_sigsegv;
|
2155 |
if (get_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]), |
2156 |
abi_ulong) != 0)
|
2157 |
goto do_sigsegv;
|
2158 |
err |= __put_user(fp, &(mcp->mc_fp)); |
2159 |
err |= __put_user(i7, &(mcp->mc_i7)); |
2160 |
|
2161 |
{ |
2162 |
uint32_t *src, *dst; |
2163 |
src = env->fpr; |
2164 |
dst = ucp->uc_mcontext.mc_fpregs.mcfpu_fregs.sregs; |
2165 |
/* XXX: check that the CPU storage is the same as user context */
|
2166 |
for (i = 0; i < 64; i++, dst++, src++) |
2167 |
err |= __put_user(*src, dst); |
2168 |
} |
2169 |
err |= __put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr)); |
2170 |
err |= __put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr)); |
2171 |
err |= __put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs)); |
2172 |
|
2173 |
if (err)
|
2174 |
goto do_sigsegv;
|
2175 |
unlock_user_struct(ucp, ucp_addr, 1);
|
2176 |
return;
|
2177 |
do_sigsegv:
|
2178 |
unlock_user_struct(ucp, ucp_addr, 1);
|
2179 |
force_sig(SIGSEGV); |
2180 |
} |
2181 |
#endif
|
2182 |
#elif defined(TARGET_ABI_MIPSN64)
|
2183 |
|
2184 |
# warning signal handling not implemented
|
2185 |
|
2186 |
static void setup_frame(int sig, struct target_sigaction *ka, |
2187 |
target_sigset_t *set, CPUState *env) |
2188 |
{ |
2189 |
fprintf(stderr, "setup_frame: not implemented\n");
|
2190 |
} |
2191 |
|
2192 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
2193 |
target_siginfo_t *info, |
2194 |
target_sigset_t *set, CPUState *env) |
2195 |
{ |
2196 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
2197 |
} |
2198 |
|
2199 |
long do_sigreturn(CPUState *env)
|
2200 |
{ |
2201 |
fprintf(stderr, "do_sigreturn: not implemented\n");
|
2202 |
return -TARGET_ENOSYS;
|
2203 |
} |
2204 |
|
2205 |
long do_rt_sigreturn(CPUState *env)
|
2206 |
{ |
2207 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
2208 |
return -TARGET_ENOSYS;
|
2209 |
} |
2210 |
|
2211 |
#elif defined(TARGET_ABI_MIPSN32)
|
2212 |
|
2213 |
# warning signal handling not implemented
|
2214 |
|
2215 |
static void setup_frame(int sig, struct target_sigaction *ka, |
2216 |
target_sigset_t *set, CPUState *env) |
2217 |
{ |
2218 |
fprintf(stderr, "setup_frame: not implemented\n");
|
2219 |
} |
2220 |
|
2221 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
2222 |
target_siginfo_t *info, |
2223 |
target_sigset_t *set, CPUState *env) |
2224 |
{ |
2225 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
2226 |
} |
2227 |
|
2228 |
long do_sigreturn(CPUState *env)
|
2229 |
{ |
2230 |
fprintf(stderr, "do_sigreturn: not implemented\n");
|
2231 |
return -TARGET_ENOSYS;
|
2232 |
} |
2233 |
|
2234 |
long do_rt_sigreturn(CPUState *env)
|
2235 |
{ |
2236 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
2237 |
return -TARGET_ENOSYS;
|
2238 |
} |
2239 |
|
2240 |
#elif defined(TARGET_ABI_MIPSO32)
|
2241 |
|
2242 |
struct target_sigcontext {
|
2243 |
uint32_t sc_regmask; /* Unused */
|
2244 |
uint32_t sc_status; |
2245 |
uint64_t sc_pc; |
2246 |
uint64_t sc_regs[32];
|
2247 |
uint64_t sc_fpregs[32];
|
2248 |
uint32_t sc_ownedfp; /* Unused */
|
2249 |
uint32_t sc_fpc_csr; |
2250 |
uint32_t sc_fpc_eir; /* Unused */
|
2251 |
uint32_t sc_used_math; |
2252 |
uint32_t sc_dsp; /* dsp status, was sc_ssflags */
|
2253 |
uint64_t sc_mdhi; |
2254 |
uint64_t sc_mdlo; |
2255 |
target_ulong sc_hi1; /* Was sc_cause */
|
2256 |
target_ulong sc_lo1; /* Was sc_badvaddr */
|
2257 |
target_ulong sc_hi2; /* Was sc_sigset[4] */
|
2258 |
target_ulong sc_lo2; |
2259 |
target_ulong sc_hi3; |
2260 |
target_ulong sc_lo3; |
2261 |
}; |
2262 |
|
2263 |
struct sigframe {
|
2264 |
uint32_t sf_ass[4]; /* argument save space for o32 */ |
2265 |
uint32_t sf_code[2]; /* signal trampoline */ |
2266 |
struct target_sigcontext sf_sc;
|
2267 |
target_sigset_t sf_mask; |
2268 |
}; |
2269 |
|
2270 |
/* Install trampoline to jump back from signal handler */
|
2271 |
static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall) |
2272 |
{ |
2273 |
int err;
|
2274 |
|
2275 |
/*
|
2276 |
* Set up the return code ...
|
2277 |
*
|
2278 |
* li v0, __NR__foo_sigreturn
|
2279 |
* syscall
|
2280 |
*/
|
2281 |
|
2282 |
err = __put_user(0x24020000 + syscall, tramp + 0); |
2283 |
err |= __put_user(0x0000000c , tramp + 1); |
2284 |
/* flush_cache_sigtramp((unsigned long) tramp); */
|
2285 |
return err;
|
2286 |
} |
2287 |
|
2288 |
static inline int |
2289 |
setup_sigcontext(CPUState *regs, struct target_sigcontext *sc)
|
2290 |
{ |
2291 |
int err = 0; |
2292 |
|
2293 |
err |= __put_user(regs->active_tc.PC, &sc->sc_pc); |
2294 |
|
2295 |
#define save_gp_reg(i) do { \ |
2296 |
err |= __put_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \ |
2297 |
} while(0) |
2298 |
__put_user(0, &sc->sc_regs[0]); save_gp_reg(1); save_gp_reg(2); |
2299 |
save_gp_reg(3); save_gp_reg(4); save_gp_reg(5); save_gp_reg(6); |
2300 |
save_gp_reg(7); save_gp_reg(8); save_gp_reg(9); save_gp_reg(10); |
2301 |
save_gp_reg(11); save_gp_reg(12); save_gp_reg(13); save_gp_reg(14); |
2302 |
save_gp_reg(15); save_gp_reg(16); save_gp_reg(17); save_gp_reg(18); |
2303 |
save_gp_reg(19); save_gp_reg(20); save_gp_reg(21); save_gp_reg(22); |
2304 |
save_gp_reg(23); save_gp_reg(24); save_gp_reg(25); save_gp_reg(26); |
2305 |
save_gp_reg(27); save_gp_reg(28); save_gp_reg(29); save_gp_reg(30); |
2306 |
save_gp_reg(31);
|
2307 |
#undef save_gp_reg
|
2308 |
|
2309 |
err |= __put_user(regs->active_tc.HI[0], &sc->sc_mdhi);
|
2310 |
err |= __put_user(regs->active_tc.LO[0], &sc->sc_mdlo);
|
2311 |
|
2312 |
/* Not used yet, but might be useful if we ever have DSP suppport */
|
2313 |
#if 0
|
2314 |
if (cpu_has_dsp) {
|
2315 |
err |= __put_user(mfhi1(), &sc->sc_hi1);
|
2316 |
err |= __put_user(mflo1(), &sc->sc_lo1);
|
2317 |
err |= __put_user(mfhi2(), &sc->sc_hi2);
|
2318 |
err |= __put_user(mflo2(), &sc->sc_lo2);
|
2319 |
err |= __put_user(mfhi3(), &sc->sc_hi3);
|
2320 |
err |= __put_user(mflo3(), &sc->sc_lo3);
|
2321 |
err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
|
2322 |
}
|
2323 |
/* same with 64 bit */
|
2324 |
#ifdef CONFIG_64BIT
|
2325 |
err |= __put_user(regs->hi, &sc->sc_hi[0]);
|
2326 |
err |= __put_user(regs->lo, &sc->sc_lo[0]);
|
2327 |
if (cpu_has_dsp) {
|
2328 |
err |= __put_user(mfhi1(), &sc->sc_hi[1]);
|
2329 |
err |= __put_user(mflo1(), &sc->sc_lo[1]);
|
2330 |
err |= __put_user(mfhi2(), &sc->sc_hi[2]);
|
2331 |
err |= __put_user(mflo2(), &sc->sc_lo[2]);
|
2332 |
err |= __put_user(mfhi3(), &sc->sc_hi[3]);
|
2333 |
err |= __put_user(mflo3(), &sc->sc_lo[3]);
|
2334 |
err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
|
2335 |
}
|
2336 |
#endif
|
2337 |
#endif
|
2338 |
|
2339 |
#if 0
|
2340 |
err |= __put_user(!!used_math(), &sc->sc_used_math);
|
2341 |
|
2342 |
if (!used_math())
|
2343 |
goto out;
|
2344 |
|
2345 |
/*
|
2346 |
* Save FPU state to signal context. Signal handler will "inherit"
|
2347 |
* current FPU state.
|
2348 |
*/
|
2349 |
preempt_disable();
|
2350 |
|
2351 |
if (!is_fpu_owner()) {
|
2352 |
own_fpu();
|
2353 |
restore_fp(current);
|
2354 |
}
|
2355 |
err |= save_fp_context(sc);
|
2356 |
|
2357 |
preempt_enable();
|
2358 |
out:
|
2359 |
#endif
|
2360 |
return err;
|
2361 |
} |
2362 |
|
2363 |
static inline int |
2364 |
restore_sigcontext(CPUState *regs, struct target_sigcontext *sc)
|
2365 |
{ |
2366 |
int err = 0; |
2367 |
|
2368 |
err |= __get_user(regs->CP0_EPC, &sc->sc_pc); |
2369 |
|
2370 |
err |= __get_user(regs->active_tc.HI[0], &sc->sc_mdhi);
|
2371 |
err |= __get_user(regs->active_tc.LO[0], &sc->sc_mdlo);
|
2372 |
|
2373 |
#define restore_gp_reg(i) do { \ |
2374 |
err |= __get_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \ |
2375 |
} while(0) |
2376 |
restore_gp_reg( 1); restore_gp_reg( 2); restore_gp_reg( 3); |
2377 |
restore_gp_reg( 4); restore_gp_reg( 5); restore_gp_reg( 6); |
2378 |
restore_gp_reg( 7); restore_gp_reg( 8); restore_gp_reg( 9); |
2379 |
restore_gp_reg(10); restore_gp_reg(11); restore_gp_reg(12); |
2380 |
restore_gp_reg(13); restore_gp_reg(14); restore_gp_reg(15); |
2381 |
restore_gp_reg(16); restore_gp_reg(17); restore_gp_reg(18); |
2382 |
restore_gp_reg(19); restore_gp_reg(20); restore_gp_reg(21); |
2383 |
restore_gp_reg(22); restore_gp_reg(23); restore_gp_reg(24); |
2384 |
restore_gp_reg(25); restore_gp_reg(26); restore_gp_reg(27); |
2385 |
restore_gp_reg(28); restore_gp_reg(29); restore_gp_reg(30); |
2386 |
restore_gp_reg(31);
|
2387 |
#undef restore_gp_reg
|
2388 |
|
2389 |
#if 0
|
2390 |
if (cpu_has_dsp) {
|
2391 |
err |= __get_user(treg, &sc->sc_hi1); mthi1(treg);
|
2392 |
err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg);
|
2393 |
err |= __get_user(treg, &sc->sc_hi2); mthi2(treg);
|
2394 |
err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg);
|
2395 |
err |= __get_user(treg, &sc->sc_hi3); mthi3(treg);
|
2396 |
err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg);
|
2397 |
err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
|
2398 |
}
|
2399 |
#ifdef CONFIG_64BIT
|
2400 |
err |= __get_user(regs->hi, &sc->sc_hi[0]);
|
2401 |
err |= __get_user(regs->lo, &sc->sc_lo[0]);
|
2402 |
if (cpu_has_dsp) {
|
2403 |
err |= __get_user(treg, &sc->sc_hi[1]); mthi1(treg);
|
2404 |
err |= __get_user(treg, &sc->sc_lo[1]); mthi1(treg);
|
2405 |
err |= __get_user(treg, &sc->sc_hi[2]); mthi2(treg);
|
2406 |
err |= __get_user(treg, &sc->sc_lo[2]); mthi2(treg);
|
2407 |
err |= __get_user(treg, &sc->sc_hi[3]); mthi3(treg);
|
2408 |
err |= __get_user(treg, &sc->sc_lo[3]); mthi3(treg);
|
2409 |
err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
|
2410 |
}
|
2411 |
#endif
|
2412 |
|
2413 |
err |= __get_user(used_math, &sc->sc_used_math); |
2414 |
conditional_used_math(used_math); |
2415 |
|
2416 |
preempt_disable(); |
2417 |
|
2418 |
if (used_math()) {
|
2419 |
/* restore fpu context if we have used it before */
|
2420 |
own_fpu(); |
2421 |
err |= restore_fp_context(sc); |
2422 |
} else {
|
2423 |
/* signal handler may have used FPU. Give it up. */
|
2424 |
lose_fpu(); |
2425 |
} |
2426 |
|
2427 |
preempt_enable(); |
2428 |
#endif
|
2429 |
return err;
|
2430 |
} |
2431 |
/*
|
2432 |
* Determine which stack to use..
|
2433 |
*/
|
2434 |
static inline abi_ulong |
2435 |
get_sigframe(struct target_sigaction *ka, CPUState *regs, size_t frame_size)
|
2436 |
{ |
2437 |
unsigned long sp; |
2438 |
|
2439 |
/* Default to using normal stack */
|
2440 |
sp = regs->active_tc.gpr[29];
|
2441 |
|
2442 |
/*
|
2443 |
* FPU emulator may have it's own trampoline active just
|
2444 |
* above the user stack, 16-bytes before the next lowest
|
2445 |
* 16 byte boundary. Try to avoid trashing it.
|
2446 |
*/
|
2447 |
sp -= 32;
|
2448 |
|
2449 |
/* This is the X/Open sanctioned signal stack switching. */
|
2450 |
if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) { |
2451 |
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
2452 |
} |
2453 |
|
2454 |
return (sp - frame_size) & ~7; |
2455 |
} |
2456 |
|
2457 |
/* compare linux/arch/mips/kernel/signal.c:setup_frame() */
|
2458 |
static void setup_frame(int sig, struct target_sigaction * ka, |
2459 |
target_sigset_t *set, CPUState *regs) |
2460 |
{ |
2461 |
struct sigframe *frame;
|
2462 |
abi_ulong frame_addr; |
2463 |
int i;
|
2464 |
|
2465 |
frame_addr = get_sigframe(ka, regs, sizeof(*frame));
|
2466 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
2467 |
goto give_sigsegv;
|
2468 |
|
2469 |
install_sigtramp(frame->sf_code, TARGET_NR_sigreturn); |
2470 |
|
2471 |
if(setup_sigcontext(regs, &frame->sf_sc))
|
2472 |
goto give_sigsegv;
|
2473 |
|
2474 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
2475 |
if(__put_user(set->sig[i], &frame->sf_mask.sig[i]))
|
2476 |
goto give_sigsegv;
|
2477 |
} |
2478 |
|
2479 |
/*
|
2480 |
* Arguments to signal handler:
|
2481 |
*
|
2482 |
* a0 = signal number
|
2483 |
* a1 = 0 (should be cause)
|
2484 |
* a2 = pointer to struct sigcontext
|
2485 |
*
|
2486 |
* $25 and PC point to the signal handler, $29 points to the
|
2487 |
* struct sigframe.
|
2488 |
*/
|
2489 |
regs->active_tc.gpr[ 4] = sig;
|
2490 |
regs->active_tc.gpr[ 5] = 0; |
2491 |
regs->active_tc.gpr[ 6] = frame_addr + offsetof(struct sigframe, sf_sc); |
2492 |
regs->active_tc.gpr[29] = frame_addr;
|
2493 |
regs->active_tc.gpr[31] = frame_addr + offsetof(struct sigframe, sf_code); |
2494 |
/* The original kernel code sets CP0_EPC to the handler
|
2495 |
* since it returns to userland using eret
|
2496 |
* we cannot do this here, and we must set PC directly */
|
2497 |
regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler;
|
2498 |
unlock_user_struct(frame, frame_addr, 1);
|
2499 |
return;
|
2500 |
|
2501 |
give_sigsegv:
|
2502 |
unlock_user_struct(frame, frame_addr, 1);
|
2503 |
force_sig(TARGET_SIGSEGV/*, current*/);
|
2504 |
return;
|
2505 |
} |
2506 |
|
2507 |
long do_sigreturn(CPUState *regs)
|
2508 |
{ |
2509 |
struct sigframe *frame;
|
2510 |
abi_ulong frame_addr; |
2511 |
sigset_t blocked; |
2512 |
target_sigset_t target_set; |
2513 |
int i;
|
2514 |
|
2515 |
#if defined(DEBUG_SIGNAL)
|
2516 |
fprintf(stderr, "do_sigreturn\n");
|
2517 |
#endif
|
2518 |
frame_addr = regs->active_tc.gpr[29];
|
2519 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
2520 |
goto badframe;
|
2521 |
|
2522 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
2523 |
if(__get_user(target_set.sig[i], &frame->sf_mask.sig[i]))
|
2524 |
goto badframe;
|
2525 |
} |
2526 |
|
2527 |
target_to_host_sigset_internal(&blocked, &target_set); |
2528 |
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
2529 |
|
2530 |
if (restore_sigcontext(regs, &frame->sf_sc))
|
2531 |
goto badframe;
|
2532 |
|
2533 |
#if 0
|
2534 |
/*
|
2535 |
* Don't let your children do this ...
|
2536 |
*/
|
2537 |
__asm__ __volatile__(
|
2538 |
"move\t$29, %0\n\t"
|
2539 |
"j\tsyscall_exit"
|
2540 |
:/* no outputs */
|
2541 |
:"r" (®s));
|
2542 |
/* Unreached */
|
2543 |
#endif
|
2544 |
|
2545 |
regs->active_tc.PC = regs->CP0_EPC; |
2546 |
/* I am not sure this is right, but it seems to work
|
2547 |
* maybe a problem with nested signals ? */
|
2548 |
regs->CP0_EPC = 0;
|
2549 |
return 0; |
2550 |
|
2551 |
badframe:
|
2552 |
force_sig(TARGET_SIGSEGV/*, current*/);
|
2553 |
return 0; |
2554 |
} |
2555 |
|
2556 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
2557 |
target_siginfo_t *info, |
2558 |
target_sigset_t *set, CPUState *env) |
2559 |
{ |
2560 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
2561 |
} |
2562 |
|
2563 |
long do_rt_sigreturn(CPUState *env)
|
2564 |
{ |
2565 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
2566 |
return -TARGET_ENOSYS;
|
2567 |
} |
2568 |
|
2569 |
#elif defined(TARGET_SH4)
|
2570 |
|
2571 |
/*
|
2572 |
* code and data structures from linux kernel:
|
2573 |
* include/asm-sh/sigcontext.h
|
2574 |
* arch/sh/kernel/signal.c
|
2575 |
*/
|
2576 |
|
2577 |
struct target_sigcontext {
|
2578 |
target_ulong oldmask; |
2579 |
|
2580 |
/* CPU registers */
|
2581 |
target_ulong sc_gregs[16];
|
2582 |
target_ulong sc_pc; |
2583 |
target_ulong sc_pr; |
2584 |
target_ulong sc_sr; |
2585 |
target_ulong sc_gbr; |
2586 |
target_ulong sc_mach; |
2587 |
target_ulong sc_macl; |
2588 |
|
2589 |
/* FPU registers */
|
2590 |
target_ulong sc_fpregs[16];
|
2591 |
target_ulong sc_xfpregs[16];
|
2592 |
unsigned int sc_fpscr; |
2593 |
unsigned int sc_fpul; |
2594 |
unsigned int sc_ownedfp; |
2595 |
}; |
2596 |
|
2597 |
struct target_sigframe
|
2598 |
{ |
2599 |
struct target_sigcontext sc;
|
2600 |
target_ulong extramask[TARGET_NSIG_WORDS-1];
|
2601 |
uint16_t retcode[3];
|
2602 |
}; |
2603 |
|
2604 |
|
2605 |
struct target_ucontext {
|
2606 |
target_ulong uc_flags; |
2607 |
struct target_ucontext *uc_link;
|
2608 |
target_stack_t uc_stack; |
2609 |
struct target_sigcontext uc_mcontext;
|
2610 |
target_sigset_t uc_sigmask; /* mask last for extensibility */
|
2611 |
}; |
2612 |
|
2613 |
struct target_rt_sigframe
|
2614 |
{ |
2615 |
struct target_siginfo info;
|
2616 |
struct target_ucontext uc;
|
2617 |
uint16_t retcode[3];
|
2618 |
}; |
2619 |
|
2620 |
|
2621 |
#define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */ |
2622 |
#define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */ |
2623 |
|
2624 |
static abi_ulong get_sigframe(struct target_sigaction *ka, |
2625 |
unsigned long sp, size_t frame_size) |
2626 |
{ |
2627 |
if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) { |
2628 |
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
2629 |
} |
2630 |
|
2631 |
return (sp - frame_size) & -8ul; |
2632 |
} |
2633 |
|
2634 |
static int setup_sigcontext(struct target_sigcontext *sc, |
2635 |
CPUState *regs, unsigned long mask) |
2636 |
{ |
2637 |
int err = 0; |
2638 |
|
2639 |
#define COPY(x) err |= __put_user(regs->x, &sc->sc_##x) |
2640 |
COPY(gregs[0]); COPY(gregs[1]); |
2641 |
COPY(gregs[2]); COPY(gregs[3]); |
2642 |
COPY(gregs[4]); COPY(gregs[5]); |
2643 |
COPY(gregs[6]); COPY(gregs[7]); |
2644 |
COPY(gregs[8]); COPY(gregs[9]); |
2645 |
COPY(gregs[10]); COPY(gregs[11]); |
2646 |
COPY(gregs[12]); COPY(gregs[13]); |
2647 |
COPY(gregs[14]); COPY(gregs[15]); |
2648 |
COPY(gbr); COPY(mach); |
2649 |
COPY(macl); COPY(pr); |
2650 |
COPY(sr); COPY(pc); |
2651 |
#undef COPY
|
2652 |
|
2653 |
/* todo: save FPU registers here */
|
2654 |
|
2655 |
/* non-iBCS2 extensions.. */
|
2656 |
err |= __put_user(mask, &sc->oldmask); |
2657 |
|
2658 |
return err;
|
2659 |
} |
2660 |
|
2661 |
static int restore_sigcontext(struct CPUState *regs, |
2662 |
struct target_sigcontext *sc)
|
2663 |
{ |
2664 |
unsigned int err = 0; |
2665 |
|
2666 |
#define COPY(x) err |= __get_user(regs->x, &sc->sc_##x) |
2667 |
COPY(gregs[1]);
|
2668 |
COPY(gregs[2]); COPY(gregs[3]); |
2669 |
COPY(gregs[4]); COPY(gregs[5]); |
2670 |
COPY(gregs[6]); COPY(gregs[7]); |
2671 |
COPY(gregs[8]); COPY(gregs[9]); |
2672 |
COPY(gregs[10]); COPY(gregs[11]); |
2673 |
COPY(gregs[12]); COPY(gregs[13]); |
2674 |
COPY(gregs[14]); COPY(gregs[15]); |
2675 |
COPY(gbr); COPY(mach); |
2676 |
COPY(macl); COPY(pr); |
2677 |
COPY(sr); COPY(pc); |
2678 |
#undef COPY
|
2679 |
|
2680 |
/* todo: restore FPU registers here */
|
2681 |
|
2682 |
regs->tra = -1; /* disable syscall checks */ |
2683 |
return err;
|
2684 |
} |
2685 |
|
2686 |
static void setup_frame(int sig, struct target_sigaction *ka, |
2687 |
target_sigset_t *set, CPUState *regs) |
2688 |
{ |
2689 |
struct target_sigframe *frame;
|
2690 |
abi_ulong frame_addr; |
2691 |
int i;
|
2692 |
int err = 0; |
2693 |
int signal;
|
2694 |
|
2695 |
frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame)); |
2696 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
2697 |
goto give_sigsegv;
|
2698 |
|
2699 |
signal = current_exec_domain_sig(sig); |
2700 |
|
2701 |
err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);
|
2702 |
|
2703 |
for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) { |
2704 |
err |= __put_user(set->sig[i + 1], &frame->extramask[i]);
|
2705 |
} |
2706 |
|
2707 |
/* Set up to return from userspace. If provided, use a stub
|
2708 |
already in userspace. */
|
2709 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
2710 |
regs->pr = (unsigned long) ka->sa_restorer; |
2711 |
} else {
|
2712 |
/* Generate return code (system call to sigreturn) */
|
2713 |
err |= __put_user(MOVW(2), &frame->retcode[0]); |
2714 |
err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
|
2715 |
err |= __put_user((TARGET_NR_sigreturn), &frame->retcode[2]);
|
2716 |
regs->pr = (unsigned long) frame->retcode; |
2717 |
} |
2718 |
|
2719 |
if (err)
|
2720 |
goto give_sigsegv;
|
2721 |
|
2722 |
/* Set up registers for signal handler */
|
2723 |
regs->gregs[15] = (unsigned long) frame; |
2724 |
regs->gregs[4] = signal; /* Arg for signal handler */ |
2725 |
regs->gregs[5] = 0; |
2726 |
regs->gregs[6] = (unsigned long) &frame->sc; |
2727 |
regs->pc = (unsigned long) ka->_sa_handler; |
2728 |
|
2729 |
unlock_user_struct(frame, frame_addr, 1);
|
2730 |
return;
|
2731 |
|
2732 |
give_sigsegv:
|
2733 |
unlock_user_struct(frame, frame_addr, 1);
|
2734 |
force_sig(SIGSEGV); |
2735 |
} |
2736 |
|
2737 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
2738 |
target_siginfo_t *info, |
2739 |
target_sigset_t *set, CPUState *regs) |
2740 |
{ |
2741 |
struct target_rt_sigframe *frame;
|
2742 |
abi_ulong frame_addr; |
2743 |
int i;
|
2744 |
int err = 0; |
2745 |
int signal;
|
2746 |
|
2747 |
frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame)); |
2748 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
2749 |
goto give_sigsegv;
|
2750 |
|
2751 |
signal = current_exec_domain_sig(sig); |
2752 |
|
2753 |
err |= copy_siginfo_to_user(&frame->info, info); |
2754 |
|
2755 |
/* Create the ucontext. */
|
2756 |
err |= __put_user(0, &frame->uc.uc_flags);
|
2757 |
err |= __put_user(0, (unsigned long *)&frame->uc.uc_link); |
2758 |
err |= __put_user((void *)target_sigaltstack_used.ss_sp,
|
2759 |
&frame->uc.uc_stack.ss_sp); |
2760 |
err |= __put_user(sas_ss_flags(regs->gregs[15]),
|
2761 |
&frame->uc.uc_stack.ss_flags); |
2762 |
err |= __put_user(target_sigaltstack_used.ss_size, |
2763 |
&frame->uc.uc_stack.ss_size); |
2764 |
err |= setup_sigcontext(&frame->uc.uc_mcontext, |
2765 |
regs, set->sig[0]);
|
2766 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
2767 |
err |= __put_user(set->sig[i], &frame->uc.uc_sigmask.sig[i]); |
2768 |
} |
2769 |
|
2770 |
/* Set up to return from userspace. If provided, use a stub
|
2771 |
already in userspace. */
|
2772 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
2773 |
regs->pr = (unsigned long) ka->sa_restorer; |
2774 |
} else {
|
2775 |
/* Generate return code (system call to sigreturn) */
|
2776 |
err |= __put_user(MOVW(2), &frame->retcode[0]); |
2777 |
err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
|
2778 |
err |= __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]);
|
2779 |
regs->pr = (unsigned long) frame->retcode; |
2780 |
} |
2781 |
|
2782 |
if (err)
|
2783 |
goto give_sigsegv;
|
2784 |
|
2785 |
/* Set up registers for signal handler */
|
2786 |
regs->gregs[15] = (unsigned long) frame; |
2787 |
regs->gregs[4] = signal; /* Arg for signal handler */ |
2788 |
regs->gregs[5] = (unsigned long) &frame->info; |
2789 |
regs->gregs[6] = (unsigned long) &frame->uc; |
2790 |
regs->pc = (unsigned long) ka->_sa_handler; |
2791 |
|
2792 |
unlock_user_struct(frame, frame_addr, 1);
|
2793 |
return;
|
2794 |
|
2795 |
give_sigsegv:
|
2796 |
unlock_user_struct(frame, frame_addr, 1);
|
2797 |
force_sig(SIGSEGV); |
2798 |
} |
2799 |
|
2800 |
long do_sigreturn(CPUState *regs)
|
2801 |
{ |
2802 |
struct target_sigframe *frame;
|
2803 |
abi_ulong frame_addr; |
2804 |
sigset_t blocked; |
2805 |
target_sigset_t target_set; |
2806 |
int i;
|
2807 |
int err = 0; |
2808 |
|
2809 |
#if defined(DEBUG_SIGNAL)
|
2810 |
fprintf(stderr, "do_sigreturn\n");
|
2811 |
#endif
|
2812 |
frame_addr = regs->gregs[15];
|
2813 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
2814 |
goto badframe;
|
2815 |
|
2816 |
err |= __get_user(target_set.sig[0], &frame->sc.oldmask);
|
2817 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
2818 |
err |= (__get_user(target_set.sig[i], &frame->extramask[i - 1]));
|
2819 |
} |
2820 |
|
2821 |
if (err)
|
2822 |
goto badframe;
|
2823 |
|
2824 |
target_to_host_sigset_internal(&blocked, &target_set); |
2825 |
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
2826 |
|
2827 |
if (restore_sigcontext(regs, &frame->sc))
|
2828 |
goto badframe;
|
2829 |
|
2830 |
unlock_user_struct(frame, frame_addr, 0);
|
2831 |
return regs->gregs[0]; |
2832 |
|
2833 |
badframe:
|
2834 |
unlock_user_struct(frame, frame_addr, 0);
|
2835 |
force_sig(TARGET_SIGSEGV); |
2836 |
return 0; |
2837 |
} |
2838 |
|
2839 |
long do_rt_sigreturn(CPUState *regs)
|
2840 |
{ |
2841 |
struct target_rt_sigframe *frame;
|
2842 |
abi_ulong frame_addr; |
2843 |
sigset_t blocked; |
2844 |
|
2845 |
#if defined(DEBUG_SIGNAL)
|
2846 |
fprintf(stderr, "do_rt_sigreturn\n");
|
2847 |
#endif
|
2848 |
frame_addr = regs->gregs[15];
|
2849 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
2850 |
goto badframe;
|
2851 |
|
2852 |
target_to_host_sigset(&blocked, &frame->uc.uc_sigmask); |
2853 |
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
2854 |
|
2855 |
if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
|
2856 |
goto badframe;
|
2857 |
|
2858 |
if (do_sigaltstack(frame_addr +
|
2859 |
offsetof(struct target_rt_sigframe, uc.uc_stack),
|
2860 |
0, get_sp_from_cpustate(regs)) == -EFAULT)
|
2861 |
goto badframe;
|
2862 |
|
2863 |
unlock_user_struct(frame, frame_addr, 0);
|
2864 |
return regs->gregs[0]; |
2865 |
|
2866 |
badframe:
|
2867 |
unlock_user_struct(frame, frame_addr, 0);
|
2868 |
force_sig(TARGET_SIGSEGV); |
2869 |
return 0; |
2870 |
} |
2871 |
#elif defined(TARGET_CRIS)
|
2872 |
|
2873 |
struct target_sigcontext {
|
2874 |
struct target_pt_regs regs; /* needs to be first */ |
2875 |
uint32_t oldmask; |
2876 |
uint32_t usp; /* usp before stacking this gunk on it */
|
2877 |
}; |
2878 |
|
2879 |
/* Signal frames. */
|
2880 |
struct target_signal_frame {
|
2881 |
struct target_sigcontext sc;
|
2882 |
uint32_t extramask[TARGET_NSIG_WORDS - 1];
|
2883 |
uint8_t retcode[8]; /* Trampoline code. */ |
2884 |
}; |
2885 |
|
2886 |
struct rt_signal_frame {
|
2887 |
struct siginfo *pinfo;
|
2888 |
void *puc;
|
2889 |
struct siginfo info;
|
2890 |
struct ucontext uc;
|
2891 |
uint8_t retcode[8]; /* Trampoline code. */ |
2892 |
}; |
2893 |
|
2894 |
static void setup_sigcontext(struct target_sigcontext *sc, CPUState *env) |
2895 |
{ |
2896 |
__put_user(env->regs[0], &sc->regs.r0);
|
2897 |
__put_user(env->regs[1], &sc->regs.r1);
|
2898 |
__put_user(env->regs[2], &sc->regs.r2);
|
2899 |
__put_user(env->regs[3], &sc->regs.r3);
|
2900 |
__put_user(env->regs[4], &sc->regs.r4);
|
2901 |
__put_user(env->regs[5], &sc->regs.r5);
|
2902 |
__put_user(env->regs[6], &sc->regs.r6);
|
2903 |
__put_user(env->regs[7], &sc->regs.r7);
|
2904 |
__put_user(env->regs[8], &sc->regs.r8);
|
2905 |
__put_user(env->regs[9], &sc->regs.r9);
|
2906 |
__put_user(env->regs[10], &sc->regs.r10);
|
2907 |
__put_user(env->regs[11], &sc->regs.r11);
|
2908 |
__put_user(env->regs[12], &sc->regs.r12);
|
2909 |
__put_user(env->regs[13], &sc->regs.r13);
|
2910 |
__put_user(env->regs[14], &sc->usp);
|
2911 |
__put_user(env->regs[15], &sc->regs.acr);
|
2912 |
__put_user(env->pregs[PR_MOF], &sc->regs.mof); |
2913 |
__put_user(env->pregs[PR_SRP], &sc->regs.srp); |
2914 |
__put_user(env->pc, &sc->regs.erp); |
2915 |
} |
2916 |
|
2917 |
static void restore_sigcontext(struct target_sigcontext *sc, CPUState *env) |
2918 |
{ |
2919 |
__get_user(env->regs[0], &sc->regs.r0);
|
2920 |
__get_user(env->regs[1], &sc->regs.r1);
|
2921 |
__get_user(env->regs[2], &sc->regs.r2);
|
2922 |
__get_user(env->regs[3], &sc->regs.r3);
|
2923 |
__get_user(env->regs[4], &sc->regs.r4);
|
2924 |
__get_user(env->regs[5], &sc->regs.r5);
|
2925 |
__get_user(env->regs[6], &sc->regs.r6);
|
2926 |
__get_user(env->regs[7], &sc->regs.r7);
|
2927 |
__get_user(env->regs[8], &sc->regs.r8);
|
2928 |
__get_user(env->regs[9], &sc->regs.r9);
|
2929 |
__get_user(env->regs[10], &sc->regs.r10);
|
2930 |
__get_user(env->regs[11], &sc->regs.r11);
|
2931 |
__get_user(env->regs[12], &sc->regs.r12);
|
2932 |
__get_user(env->regs[13], &sc->regs.r13);
|
2933 |
__get_user(env->regs[14], &sc->usp);
|
2934 |
__get_user(env->regs[15], &sc->regs.acr);
|
2935 |
__get_user(env->pregs[PR_MOF], &sc->regs.mof); |
2936 |
__get_user(env->pregs[PR_SRP], &sc->regs.srp); |
2937 |
__get_user(env->pc, &sc->regs.erp); |
2938 |
} |
2939 |
|
2940 |
static abi_ulong get_sigframe(CPUState *env, int framesize) |
2941 |
{ |
2942 |
abi_ulong sp; |
2943 |
/* Align the stack downwards to 4. */
|
2944 |
sp = (env->regs[R_SP] & ~3);
|
2945 |
return sp - framesize;
|
2946 |
} |
2947 |
|
2948 |
static void setup_frame(int sig, struct target_sigaction *ka, |
2949 |
target_sigset_t *set, CPUState *env) |
2950 |
{ |
2951 |
struct target_signal_frame *frame;
|
2952 |
abi_ulong frame_addr; |
2953 |
int err = 0; |
2954 |
int i;
|
2955 |
|
2956 |
frame_addr = get_sigframe(env, sizeof *frame);
|
2957 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
2958 |
goto badframe;
|
2959 |
|
2960 |
/*
|
2961 |
* The CRIS signal return trampoline. A real linux/CRIS kernel doesn't
|
2962 |
* use this trampoline anymore but it sets it up for GDB.
|
2963 |
* In QEMU, using the trampoline simplifies things a bit so we use it.
|
2964 |
*
|
2965 |
* This is movu.w __NR_sigreturn, r9; break 13;
|
2966 |
*/
|
2967 |
err |= __put_user(0x9c5f, frame->retcode+0); |
2968 |
err |= __put_user(TARGET_NR_sigreturn, |
2969 |
frame->retcode+2);
|
2970 |
err |= __put_user(0xe93d, frame->retcode+4); |
2971 |
|
2972 |
/* Save the mask. */
|
2973 |
err |= __put_user(set->sig[0], &frame->sc.oldmask);
|
2974 |
if (err)
|
2975 |
goto badframe;
|
2976 |
|
2977 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
2978 |
if (__put_user(set->sig[i], &frame->extramask[i - 1])) |
2979 |
goto badframe;
|
2980 |
} |
2981 |
|
2982 |
setup_sigcontext(&frame->sc, env); |
2983 |
|
2984 |
/* Move the stack and setup the arguments for the handler. */
|
2985 |
env->regs[R_SP] = (uint32_t) frame; |
2986 |
env->regs[10] = sig;
|
2987 |
env->pc = (unsigned long) ka->_sa_handler; |
2988 |
/* Link SRP so the guest returns through the trampoline. */
|
2989 |
env->pregs[PR_SRP] = (uint32_t) &frame->retcode[0];
|
2990 |
|
2991 |
unlock_user_struct(frame, frame_addr, 1);
|
2992 |
return;
|
2993 |
badframe:
|
2994 |
unlock_user_struct(frame, frame_addr, 1);
|
2995 |
force_sig(TARGET_SIGSEGV); |
2996 |
} |
2997 |
|
2998 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
2999 |
target_siginfo_t *info, |
3000 |
target_sigset_t *set, CPUState *env) |
3001 |
{ |
3002 |
fprintf(stderr, "CRIS setup_rt_frame: not implemented\n");
|
3003 |
} |
3004 |
|
3005 |
long do_sigreturn(CPUState *env)
|
3006 |
{ |
3007 |
struct target_signal_frame *frame;
|
3008 |
abi_ulong frame_addr; |
3009 |
target_sigset_t target_set; |
3010 |
sigset_t set; |
3011 |
int i;
|
3012 |
|
3013 |
frame_addr = env->regs[R_SP]; |
3014 |
/* Make sure the guest isn't playing games. */
|
3015 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) |
3016 |
goto badframe;
|
3017 |
|
3018 |
/* Restore blocked signals */
|
3019 |
if (__get_user(target_set.sig[0], &frame->sc.oldmask)) |
3020 |
goto badframe;
|
3021 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
3022 |
if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) |
3023 |
goto badframe;
|
3024 |
} |
3025 |
target_to_host_sigset_internal(&set, &target_set); |
3026 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
3027 |
|
3028 |
restore_sigcontext(&frame->sc, env); |
3029 |
/* Compensate for the syscall return path advancing brk. */
|
3030 |
env->pc -= 2;
|
3031 |
|
3032 |
unlock_user_struct(frame, frame_addr, 0);
|
3033 |
return env->regs[10]; |
3034 |
badframe:
|
3035 |
unlock_user_struct(frame, frame_addr, 0);
|
3036 |
force_sig(TARGET_SIGSEGV); |
3037 |
} |
3038 |
|
3039 |
long do_rt_sigreturn(CPUState *env)
|
3040 |
{ |
3041 |
fprintf(stderr, "CRIS do_rt_sigreturn: not implemented\n");
|
3042 |
return -TARGET_ENOSYS;
|
3043 |
} |
3044 |
|
3045 |
#else
|
3046 |
|
3047 |
static void setup_frame(int sig, struct target_sigaction *ka, |
3048 |
target_sigset_t *set, CPUState *env) |
3049 |
{ |
3050 |
fprintf(stderr, "setup_frame: not implemented\n");
|
3051 |
} |
3052 |
|
3053 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
3054 |
target_siginfo_t *info, |
3055 |
target_sigset_t *set, CPUState *env) |
3056 |
{ |
3057 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
3058 |
} |
3059 |
|
3060 |
long do_sigreturn(CPUState *env)
|
3061 |
{ |
3062 |
fprintf(stderr, "do_sigreturn: not implemented\n");
|
3063 |
return -TARGET_ENOSYS;
|
3064 |
} |
3065 |
|
3066 |
long do_rt_sigreturn(CPUState *env)
|
3067 |
{ |
3068 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
3069 |
return -TARGET_ENOSYS;
|
3070 |
} |
3071 |
|
3072 |
#endif
|
3073 |
|
3074 |
void process_pending_signals(CPUState *cpu_env)
|
3075 |
{ |
3076 |
int sig;
|
3077 |
abi_ulong handler; |
3078 |
sigset_t set, old_set; |
3079 |
target_sigset_t target_old_set; |
3080 |
struct emulated_sigtable *k;
|
3081 |
struct target_sigaction *sa;
|
3082 |
struct sigqueue *q;
|
3083 |
TaskState *ts = cpu_env->opaque; |
3084 |
|
3085 |
if (!ts->signal_pending)
|
3086 |
return;
|
3087 |
|
3088 |
/* FIXME: This is not threadsafe. */
|
3089 |
k = ts->sigtab; |
3090 |
for(sig = 1; sig <= TARGET_NSIG; sig++) { |
3091 |
if (k->pending)
|
3092 |
goto handle_signal;
|
3093 |
k++; |
3094 |
} |
3095 |
/* if no signal is pending, just return */
|
3096 |
ts->signal_pending = 0;
|
3097 |
return;
|
3098 |
|
3099 |
handle_signal:
|
3100 |
#ifdef DEBUG_SIGNAL
|
3101 |
fprintf(stderr, "qemu: process signal %d\n", sig);
|
3102 |
#endif
|
3103 |
/* dequeue signal */
|
3104 |
q = k->first; |
3105 |
k->first = q->next; |
3106 |
if (!k->first)
|
3107 |
k->pending = 0;
|
3108 |
|
3109 |
sig = gdb_handlesig (cpu_env, sig); |
3110 |
if (!sig) {
|
3111 |
fprintf (stderr, "Lost signal\n");
|
3112 |
abort(); |
3113 |
} |
3114 |
|
3115 |
sa = &sigact_table[sig - 1];
|
3116 |
handler = sa->_sa_handler; |
3117 |
if (handler == TARGET_SIG_DFL) {
|
3118 |
/* default handler : ignore some signal. The other are fatal */
|
3119 |
if (sig != TARGET_SIGCHLD &&
|
3120 |
sig != TARGET_SIGURG && |
3121 |
sig != TARGET_SIGWINCH) { |
3122 |
force_sig(sig); |
3123 |
} |
3124 |
} else if (handler == TARGET_SIG_IGN) { |
3125 |
/* ignore sig */
|
3126 |
} else if (handler == TARGET_SIG_ERR) { |
3127 |
force_sig(sig); |
3128 |
} else {
|
3129 |
/* compute the blocked signals during the handler execution */
|
3130 |
target_to_host_sigset(&set, &sa->sa_mask); |
3131 |
/* SA_NODEFER indicates that the current signal should not be
|
3132 |
blocked during the handler */
|
3133 |
if (!(sa->sa_flags & TARGET_SA_NODEFER))
|
3134 |
sigaddset(&set, target_to_host_signal(sig)); |
3135 |
|
3136 |
/* block signals in the handler using Linux */
|
3137 |
sigprocmask(SIG_BLOCK, &set, &old_set); |
3138 |
/* save the previous blocked signal state to restore it at the
|
3139 |
end of the signal execution (see do_sigreturn) */
|
3140 |
host_to_target_sigset_internal(&target_old_set, &old_set); |
3141 |
|
3142 |
/* if the CPU is in VM86 mode, we restore the 32 bit values */
|
3143 |
#if defined(TARGET_I386) && !defined(TARGET_X86_64)
|
3144 |
{ |
3145 |
CPUX86State *env = cpu_env; |
3146 |
if (env->eflags & VM_MASK)
|
3147 |
save_v86_state(env); |
3148 |
} |
3149 |
#endif
|
3150 |
/* prepare the stack frame of the virtual CPU */
|
3151 |
if (sa->sa_flags & TARGET_SA_SIGINFO)
|
3152 |
setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env); |
3153 |
else
|
3154 |
setup_frame(sig, sa, &target_old_set, cpu_env); |
3155 |
if (sa->sa_flags & TARGET_SA_RESETHAND)
|
3156 |
sa->_sa_handler = TARGET_SIG_DFL; |
3157 |
} |
3158 |
if (q != &k->info)
|
3159 |
free_sigqueue(cpu_env, q); |
3160 |
} |