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/*
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* Emulation of Linux signals
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <stdarg.h> |
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#include <unistd.h> |
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#include <signal.h> |
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#include <errno.h> |
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#include <sys/ucontext.h> |
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|
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#include "qemu.h" |
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#include "qemu-common.h" |
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#include "target_signal.h" |
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|
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//#define DEBUG_SIGNAL
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static struct target_sigaltstack target_sigaltstack_used = { |
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.ss_sp = 0,
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.ss_size = 0,
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.ss_flags = TARGET_SS_DISABLE, |
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}; |
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|
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static struct target_sigaction sigact_table[TARGET_NSIG]; |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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void host_to_target_sigset(target_sigset_t *d, const sigset_t *s) |
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{
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target_sigset_t d1; |
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int i;
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host_to_target_sigset_internal(&d1, s); |
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for(i = 0;i < TARGET_NSIG_WORDS; i++) |
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d->sig[i] = tswapl(d1.sig[i]); |
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} |
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static void target_to_host_sigset_internal(sigset_t *d, |
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const target_sigset_t *s)
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{
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int i;
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sigemptyset(d); |
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for (i = 1; i <= TARGET_NSIG; i++) { |
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if (target_sigismember(s, i)) {
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sigaddset(d, target_to_host_signal(i)); |
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} |
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} |
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} |
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|
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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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|
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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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|
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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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} |
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|
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/* XXX: we support only POSIX RT signals are used. */
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/* XXX: find a solution for 64 bit (additional malloced data is needed) */
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void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo) |
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{
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info->si_signo = tswap32(tinfo->si_signo); |
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info->si_errno = tswap32(tinfo->si_errno); |
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info->si_code = tswap32(tinfo->si_code); |
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info->si_pid = tswap32(tinfo->_sifields._rt._pid); |
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info->si_uid = tswap32(tinfo->_sifields._rt._uid); |
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info->si_value.sival_ptr = |
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(void *)(long)tswapl(tinfo->_sifields._rt._sigval.sival_ptr); |
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} |
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static int fatal_signal (int sig) |
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{
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switch (sig) {
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case TARGET_SIGCHLD:
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case TARGET_SIGURG:
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case TARGET_SIGWINCH:
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/* Ignored by default. */
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return 0; |
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case TARGET_SIGCONT:
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case TARGET_SIGSTOP:
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case TARGET_SIGTSTP:
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case TARGET_SIGTTIN:
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case TARGET_SIGTTOU:
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/* Job control signals. */
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return 0; |
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default:
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return 1; |
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} |
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} |
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|
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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++) { |
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if (host_to_target_signal_table[i] == 0) |
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host_to_target_signal_table[i] = i; |
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} |
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for(i = 1; i <= 64; i++) { |
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j = host_to_target_signal_table[i]; |
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target_to_host_signal_table[j] = i; |
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} |
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|
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/* set all host signal handlers. ALL signals are blocked during
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the handlers to serialize them. */
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memset(sigact_table, 0, sizeof(sigact_table)); |
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|
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sigfillset(&act.sa_mask); |
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act.sa_flags = SA_SIGINFO; |
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act.sa_sigaction = host_signal_handler; |
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for(i = 1; i <= TARGET_NSIG; i++) { |
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host_sig = target_to_host_signal(i); |
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sigaction(host_sig, NULL, &oact);
|
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if (oact.sa_sigaction == (void *)SIG_IGN) { |
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sigact_table[i - 1]._sa_handler = TARGET_SIG_IGN;
|
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} else if (oact.sa_sigaction == (void *)SIG_DFL) { |
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sigact_table[i - 1]._sa_handler = TARGET_SIG_DFL;
|
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} |
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/* If there's already a handler installed then something has
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gone horribly wrong, so don't even try to handle that case. */
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/* Install some handlers for our own use. We need at least
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SIGSEGV and SIGBUS, to detect exceptions. We can not just
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trap all signals because it affects syscall interrupt
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behavior. But do trap all default-fatal signals. */
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if (fatal_signal (i))
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sigaction(host_sig, &act, NULL);
|
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} |
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} |
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|
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/* signal queue handling */
|
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|
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static inline struct sigqueue *alloc_sigqueue(CPUState *env) |
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{
|
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TaskState *ts = env->opaque; |
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struct sigqueue *q = ts->first_free;
|
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if (!q)
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return NULL; |
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ts->first_free = q->next; |
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return q;
|
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} |
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|
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static inline void free_sigqueue(CPUState *env, struct sigqueue *q) |
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{
|
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TaskState *ts = env->opaque; |
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q->next = ts->first_free; |
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ts->first_free = q; |
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} |
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|
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/* abort execution with signal */
|
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static void QEMU_NORETURN force_sig(int sig) |
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{
|
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int host_sig;
|
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host_sig = target_to_host_signal(sig); |
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fprintf(stderr, "qemu: uncaught target signal %d (%s) - exiting\n",
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sig, strsignal(host_sig)); |
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#if 1 |
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gdb_signalled(thread_env, sig); |
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_exit(-host_sig); |
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#else
|
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{
|
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struct sigaction act;
|
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sigemptyset(&act.sa_mask); |
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act.sa_flags = SA_SIGINFO; |
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act.sa_sigaction = SIG_DFL; |
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sigaction(SIGABRT, &act, NULL);
|
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abort(); |
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} |
| 370 |
#endif
|
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} |
| 372 |
|
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/* queue a signal so that it will be send to the virtual CPU as soon
|
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as possible */
|
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int queue_signal(CPUState *env, int sig, target_siginfo_t *info) |
| 376 |
{
|
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TaskState *ts = env->opaque; |
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struct emulated_sigtable *k;
|
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struct sigqueue *q, **pq;
|
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abi_ulong handler; |
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int queue;
|
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|
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#if defined(DEBUG_SIGNAL)
|
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fprintf(stderr, "queue_signal: sig=%d\n",
|
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sig); |
| 386 |
#endif
|
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k = &ts->sigtab[sig - 1];
|
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queue = gdb_queuesig (); |
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handler = sigact_table[sig - 1]._sa_handler;
|
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if (!queue && handler == TARGET_SIG_DFL) {
|
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if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
|
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kill(getpid(),SIGSTOP); |
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return 0; |
| 394 |
} else
|
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/* default handler : ignore some signal. The other are fatal */
|
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if (sig != TARGET_SIGCHLD &&
|
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sig != TARGET_SIGURG && |
| 398 |
sig != TARGET_SIGWINCH && |
| 399 |
sig != TARGET_SIGCONT) {
|
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force_sig(sig); |
| 401 |
} else {
|
| 402 |
return 0; /* indicate ignored */ |
| 403 |
} |
| 404 |
} else if (!queue && handler == TARGET_SIG_IGN) { |
| 405 |
/* ignore signal */
|
| 406 |
return 0; |
| 407 |
} else if (!queue && handler == TARGET_SIG_ERR) { |
| 408 |
force_sig(sig); |
| 409 |
} else {
|
| 410 |
pq = &k->first; |
| 411 |
if (sig < TARGET_SIGRTMIN) {
|
| 412 |
/* if non real time signal, we queue exactly one signal */
|
| 413 |
if (!k->pending)
|
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q = &k->info; |
| 415 |
else
|
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return 0; |
| 417 |
} else {
|
| 418 |
if (!k->pending) {
|
| 419 |
/* first signal */
|
| 420 |
q = &k->info; |
| 421 |
} else {
|
| 422 |
q = alloc_sigqueue(env); |
| 423 |
if (!q)
|
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return -EAGAIN;
|
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while (*pq != NULL) |
| 426 |
pq = &(*pq)->next; |
| 427 |
} |
| 428 |
} |
| 429 |
*pq = q; |
| 430 |
q->info = *info; |
| 431 |
q->next = NULL;
|
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k->pending = 1;
|
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/* signal that a new signal is pending */
|
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ts->signal_pending = 1;
|
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return 1; /* indicates that the signal was queued */ |
| 436 |
} |
| 437 |
} |
| 438 |
|
| 439 |
static void host_signal_handler(int host_signum, siginfo_t *info, |
| 440 |
void *puc)
|
| 441 |
{
|
| 442 |
int sig;
|
| 443 |
target_siginfo_t tinfo; |
| 444 |
|
| 445 |
/* the CPU emulator uses some host signals to detect exceptions,
|
| 446 |
we forward to it some signals */
|
| 447 |
if ((host_signum == SIGSEGV || host_signum == SIGBUS)
|
| 448 |
&& info->si_code > 0) {
|
| 449 |
if (cpu_signal_handler(host_signum, info, puc))
|
| 450 |
return;
|
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} |
| 452 |
|
| 453 |
/* get target signal number */
|
| 454 |
sig = host_to_target_signal(host_signum); |
| 455 |
if (sig < 1 || sig > TARGET_NSIG) |
| 456 |
return;
|
| 457 |
#if defined(DEBUG_SIGNAL)
|
| 458 |
fprintf(stderr, "qemu: got signal %d\n", sig);
|
| 459 |
#endif
|
| 460 |
host_to_target_siginfo_noswap(&tinfo, info); |
| 461 |
if (queue_signal(thread_env, sig, &tinfo) == 1) { |
| 462 |
/* interrupt the virtual CPU as soon as possible */
|
| 463 |
cpu_interrupt(thread_env, CPU_INTERRUPT_EXIT); |
| 464 |
} |
| 465 |
} |
| 466 |
|
| 467 |
/* do_sigaltstack() returns target values and errnos. */
|
| 468 |
/* compare linux/kernel/signal.c:do_sigaltstack() */
|
| 469 |
abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp) |
| 470 |
{
|
| 471 |
int ret;
|
| 472 |
struct target_sigaltstack oss;
|
| 473 |
|
| 474 |
/* XXX: test errors */
|
| 475 |
if(uoss_addr)
|
| 476 |
{
|
| 477 |
__put_user(target_sigaltstack_used.ss_sp, &oss.ss_sp); |
| 478 |
__put_user(target_sigaltstack_used.ss_size, &oss.ss_size); |
| 479 |
__put_user(sas_ss_flags(sp), &oss.ss_flags); |
| 480 |
} |
| 481 |
|
| 482 |
if(uss_addr)
|
| 483 |
{
|
| 484 |
struct target_sigaltstack *uss;
|
| 485 |
struct target_sigaltstack ss;
|
| 486 |
|
| 487 |
ret = -TARGET_EFAULT; |
| 488 |
if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1) |
| 489 |
|| __get_user(ss.ss_sp, &uss->ss_sp) |
| 490 |
|| __get_user(ss.ss_size, &uss->ss_size) |
| 491 |
|| __get_user(ss.ss_flags, &uss->ss_flags)) |
| 492 |
goto out;
|
| 493 |
unlock_user_struct(uss, uss_addr, 0);
|
| 494 |
|
| 495 |
ret = -TARGET_EPERM; |
| 496 |
if (on_sig_stack(sp))
|
| 497 |
goto out;
|
| 498 |
|
| 499 |
ret = -TARGET_EINVAL; |
| 500 |
if (ss.ss_flags != TARGET_SS_DISABLE
|
| 501 |
&& ss.ss_flags != TARGET_SS_ONSTACK |
| 502 |
&& ss.ss_flags != 0)
|
| 503 |
goto out;
|
| 504 |
|
| 505 |
if (ss.ss_flags == TARGET_SS_DISABLE) {
|
| 506 |
ss.ss_size = 0;
|
| 507 |
ss.ss_sp = 0;
|
| 508 |
} else {
|
| 509 |
ret = -TARGET_ENOMEM; |
| 510 |
if (ss.ss_size < MINSIGSTKSZ)
|
| 511 |
goto out;
|
| 512 |
} |
| 513 |
|
| 514 |
target_sigaltstack_used.ss_sp = ss.ss_sp; |
| 515 |
target_sigaltstack_used.ss_size = ss.ss_size; |
| 516 |
} |
| 517 |
|
| 518 |
if (uoss_addr) {
|
| 519 |
ret = -TARGET_EFAULT; |
| 520 |
if (copy_to_user(uoss_addr, &oss, sizeof(oss))) |
| 521 |
goto out;
|
| 522 |
} |
| 523 |
|
| 524 |
ret = 0;
|
| 525 |
out:
|
| 526 |
return ret;
|
| 527 |
} |
| 528 |
|
| 529 |
/* do_sigaction() return host values and errnos */
|
| 530 |
int do_sigaction(int sig, const struct target_sigaction *act, |
| 531 |
struct target_sigaction *oact)
|
| 532 |
{
|
| 533 |
struct target_sigaction *k;
|
| 534 |
struct sigaction act1;
|
| 535 |
int host_sig;
|
| 536 |
int ret = 0; |
| 537 |
|
| 538 |
if (sig < 1 || sig > TARGET_NSIG || sig == TARGET_SIGKILL || sig == TARGET_SIGSTOP) |
| 539 |
return -EINVAL;
|
| 540 |
k = &sigact_table[sig - 1];
|
| 541 |
#if defined(DEBUG_SIGNAL)
|
| 542 |
fprintf(stderr, "sigaction sig=%d act=0x%08x, oact=0x%08x\n",
|
| 543 |
sig, (int)act, (int)oact); |
| 544 |
#endif
|
| 545 |
if (oact) {
|
| 546 |
oact->_sa_handler = tswapl(k->_sa_handler); |
| 547 |
oact->sa_flags = tswapl(k->sa_flags); |
| 548 |
#if !defined(TARGET_MIPS)
|
| 549 |
oact->sa_restorer = tswapl(k->sa_restorer); |
| 550 |
#endif
|
| 551 |
oact->sa_mask = k->sa_mask; |
| 552 |
} |
| 553 |
if (act) {
|
| 554 |
/* FIXME: This is not threadsafe. */
|
| 555 |
k->_sa_handler = tswapl(act->_sa_handler); |
| 556 |
k->sa_flags = tswapl(act->sa_flags); |
| 557 |
#if !defined(TARGET_MIPS)
|
| 558 |
k->sa_restorer = tswapl(act->sa_restorer); |
| 559 |
#endif
|
| 560 |
k->sa_mask = act->sa_mask; |
| 561 |
|
| 562 |
/* we update the host linux signal state */
|
| 563 |
host_sig = target_to_host_signal(sig); |
| 564 |
if (host_sig != SIGSEGV && host_sig != SIGBUS) {
|
| 565 |
sigfillset(&act1.sa_mask); |
| 566 |
act1.sa_flags = SA_SIGINFO; |
| 567 |
if (k->sa_flags & TARGET_SA_RESTART)
|
| 568 |
act1.sa_flags |= SA_RESTART; |
| 569 |
/* NOTE: it is important to update the host kernel signal
|
| 570 |
ignore state to avoid getting unexpected interrupted
|
| 571 |
syscalls */
|
| 572 |
if (k->_sa_handler == TARGET_SIG_IGN) {
|
| 573 |
act1.sa_sigaction = (void *)SIG_IGN;
|
| 574 |
} else if (k->_sa_handler == TARGET_SIG_DFL) { |
| 575 |
if (fatal_signal (sig))
|
| 576 |
act1.sa_sigaction = host_signal_handler; |
| 577 |
else
|
| 578 |
act1.sa_sigaction = (void *)SIG_DFL;
|
| 579 |
} else {
|
| 580 |
act1.sa_sigaction = host_signal_handler; |
| 581 |
} |
| 582 |
ret = sigaction(host_sig, &act1, NULL);
|
| 583 |
} |
| 584 |
} |
| 585 |
return ret;
|
| 586 |
} |
| 587 |
|
| 588 |
static inline int copy_siginfo_to_user(target_siginfo_t *tinfo, |
| 589 |
const target_siginfo_t *info)
|
| 590 |
{
|
| 591 |
tswap_siginfo(tinfo, info); |
| 592 |
return 0; |
| 593 |
} |
| 594 |
|
| 595 |
static inline int current_exec_domain_sig(int sig) |
| 596 |
{
|
| 597 |
return /* current->exec_domain && current->exec_domain->signal_invmap |
| 598 |
&& sig < 32 ? current->exec_domain->signal_invmap[sig] : */ sig;
|
| 599 |
} |
| 600 |
|
| 601 |
#if defined(TARGET_I386) && TARGET_ABI_BITS == 32 |
| 602 |
|
| 603 |
/* from the Linux kernel */
|
| 604 |
|
| 605 |
struct target_fpreg {
|
| 606 |
uint16_t significand[4];
|
| 607 |
uint16_t exponent; |
| 608 |
}; |
| 609 |
|
| 610 |
struct target_fpxreg {
|
| 611 |
uint16_t significand[4];
|
| 612 |
uint16_t exponent; |
| 613 |
uint16_t padding[3];
|
| 614 |
}; |
| 615 |
|
| 616 |
struct target_xmmreg {
|
| 617 |
abi_ulong element[4];
|
| 618 |
}; |
| 619 |
|
| 620 |
struct target_fpstate {
|
| 621 |
/* Regular FPU environment */
|
| 622 |
abi_ulong cw; |
| 623 |
abi_ulong sw; |
| 624 |
abi_ulong tag; |
| 625 |
abi_ulong ipoff; |
| 626 |
abi_ulong cssel; |
| 627 |
abi_ulong dataoff; |
| 628 |
abi_ulong datasel; |
| 629 |
struct target_fpreg _st[8]; |
| 630 |
uint16_t status; |
| 631 |
uint16_t magic; /* 0xffff = regular FPU data only */
|
| 632 |
|
| 633 |
/* FXSR FPU environment */
|
| 634 |
abi_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */ |
| 635 |
abi_ulong mxcsr; |
| 636 |
abi_ulong reserved; |
| 637 |
struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */ |
| 638 |
struct target_xmmreg _xmm[8]; |
| 639 |
abi_ulong padding[56];
|
| 640 |
}; |
| 641 |
|
| 642 |
#define X86_FXSR_MAGIC 0x0000 |
| 643 |
|
| 644 |
struct target_sigcontext {
|
| 645 |
uint16_t gs, __gsh; |
| 646 |
uint16_t fs, __fsh; |
| 647 |
uint16_t es, __esh; |
| 648 |
uint16_t ds, __dsh; |
| 649 |
abi_ulong edi; |
| 650 |
abi_ulong esi; |
| 651 |
abi_ulong ebp; |
| 652 |
abi_ulong esp; |
| 653 |
abi_ulong ebx; |
| 654 |
abi_ulong edx; |
| 655 |
abi_ulong ecx; |
| 656 |
abi_ulong eax; |
| 657 |
abi_ulong trapno; |
| 658 |
abi_ulong err; |
| 659 |
abi_ulong eip; |
| 660 |
uint16_t cs, __csh; |
| 661 |
abi_ulong eflags; |
| 662 |
abi_ulong esp_at_signal; |
| 663 |
uint16_t ss, __ssh; |
| 664 |
abi_ulong fpstate; /* pointer */
|
| 665 |
abi_ulong oldmask; |
| 666 |
abi_ulong cr2; |
| 667 |
}; |
| 668 |
|
| 669 |
struct target_ucontext {
|
| 670 |
abi_ulong tuc_flags; |
| 671 |
abi_ulong tuc_link; |
| 672 |
target_stack_t tuc_stack; |
| 673 |
struct target_sigcontext tuc_mcontext;
|
| 674 |
target_sigset_t tuc_sigmask; /* mask last for extensibility */
|
| 675 |
}; |
| 676 |
|
| 677 |
struct sigframe
|
| 678 |
{
|
| 679 |
abi_ulong pretcode; |
| 680 |
int sig;
|
| 681 |
struct target_sigcontext sc;
|
| 682 |
struct target_fpstate fpstate;
|
| 683 |
abi_ulong extramask[TARGET_NSIG_WORDS-1];
|
| 684 |
char retcode[8]; |
| 685 |
}; |
| 686 |
|
| 687 |
struct rt_sigframe
|
| 688 |
{
|
| 689 |
abi_ulong pretcode; |
| 690 |
int sig;
|
| 691 |
abi_ulong pinfo; |
| 692 |
abi_ulong puc; |
| 693 |
struct target_siginfo info;
|
| 694 |
struct target_ucontext uc;
|
| 695 |
struct target_fpstate fpstate;
|
| 696 |
char retcode[8]; |
| 697 |
}; |
| 698 |
|
| 699 |
/*
|
| 700 |
* Set up a signal frame.
|
| 701 |
*/
|
| 702 |
|
| 703 |
/* XXX: save x87 state */
|
| 704 |
static int |
| 705 |
setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate, |
| 706 |
CPUX86State *env, abi_ulong mask, abi_ulong fpstate_addr) |
| 707 |
{
|
| 708 |
int err = 0; |
| 709 |
uint16_t magic; |
| 710 |
|
| 711 |
/* already locked in setup_frame() */
|
| 712 |
err |= __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs); |
| 713 |
err |= __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs); |
| 714 |
err |= __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es); |
| 715 |
err |= __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds); |
| 716 |
err |= __put_user(env->regs[R_EDI], &sc->edi); |
| 717 |
err |= __put_user(env->regs[R_ESI], &sc->esi); |
| 718 |
err |= __put_user(env->regs[R_EBP], &sc->ebp); |
| 719 |
err |= __put_user(env->regs[R_ESP], &sc->esp); |
| 720 |
err |= __put_user(env->regs[R_EBX], &sc->ebx); |
| 721 |
err |= __put_user(env->regs[R_EDX], &sc->edx); |
| 722 |
err |= __put_user(env->regs[R_ECX], &sc->ecx); |
| 723 |
err |= __put_user(env->regs[R_EAX], &sc->eax); |
| 724 |
err |= __put_user(env->exception_index, &sc->trapno); |
| 725 |
err |= __put_user(env->error_code, &sc->err); |
| 726 |
err |= __put_user(env->eip, &sc->eip); |
| 727 |
err |= __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs); |
| 728 |
err |= __put_user(env->eflags, &sc->eflags); |
| 729 |
err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal); |
| 730 |
err |= __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss); |
| 731 |
|
| 732 |
cpu_x86_fsave(env, fpstate_addr, 1);
|
| 733 |
fpstate->status = fpstate->sw; |
| 734 |
magic = 0xffff;
|
| 735 |
err |= __put_user(magic, &fpstate->magic); |
| 736 |
err |= __put_user(fpstate_addr, &sc->fpstate); |
| 737 |
|
| 738 |
/* non-iBCS2 extensions.. */
|
| 739 |
err |= __put_user(mask, &sc->oldmask); |
| 740 |
err |= __put_user(env->cr[2], &sc->cr2);
|
| 741 |
return err;
|
| 742 |
} |
| 743 |
|
| 744 |
/*
|
| 745 |
* Determine which stack to use..
|
| 746 |
*/
|
| 747 |
|
| 748 |
static inline abi_ulong |
| 749 |
get_sigframe(struct target_sigaction *ka, CPUX86State *env, size_t frame_size)
|
| 750 |
{
|
| 751 |
unsigned long esp; |
| 752 |
|
| 753 |
/* Default to using normal stack */
|
| 754 |
esp = env->regs[R_ESP]; |
| 755 |
/* This is the X/Open sanctioned signal stack switching. */
|
| 756 |
if (ka->sa_flags & TARGET_SA_ONSTACK) {
|
| 757 |
if (sas_ss_flags(esp) == 0) |
| 758 |
esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
| 759 |
} |
| 760 |
|
| 761 |
/* This is the legacy signal stack switching. */
|
| 762 |
else
|
| 763 |
if ((env->segs[R_SS].selector & 0xffff) != __USER_DS && |
| 764 |
!(ka->sa_flags & TARGET_SA_RESTORER) && |
| 765 |
ka->sa_restorer) {
|
| 766 |
esp = (unsigned long) ka->sa_restorer; |
| 767 |
} |
| 768 |
return (esp - frame_size) & -8ul; |
| 769 |
} |
| 770 |
|
| 771 |
/* compare linux/arch/i386/kernel/signal.c:setup_frame() */
|
| 772 |
static void setup_frame(int sig, struct target_sigaction *ka, |
| 773 |
target_sigset_t *set, CPUX86State *env) |
| 774 |
{
|
| 775 |
abi_ulong frame_addr; |
| 776 |
struct sigframe *frame;
|
| 777 |
int i, err = 0; |
| 778 |
|
| 779 |
frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
| 780 |
|
| 781 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
| 782 |
goto give_sigsegv;
|
| 783 |
|
| 784 |
err |= __put_user(current_exec_domain_sig(sig), |
| 785 |
&frame->sig); |
| 786 |
if (err)
|
| 787 |
goto give_sigsegv;
|
| 788 |
|
| 789 |
setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0],
|
| 790 |
frame_addr + offsetof(struct sigframe, fpstate));
|
| 791 |
if (err)
|
| 792 |
goto give_sigsegv;
|
| 793 |
|
| 794 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
| 795 |
if (__put_user(set->sig[i], &frame->extramask[i - 1])) |
| 796 |
goto give_sigsegv;
|
| 797 |
} |
| 798 |
|
| 799 |
/* Set up to return from userspace. If provided, use a stub
|
| 800 |
already in userspace. */
|
| 801 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
| 802 |
err |= __put_user(ka->sa_restorer, &frame->pretcode); |
| 803 |
} else {
|
| 804 |
uint16_t val16; |
| 805 |
abi_ulong retcode_addr; |
| 806 |
retcode_addr = frame_addr + offsetof(struct sigframe, retcode);
|
| 807 |
err |= __put_user(retcode_addr, &frame->pretcode); |
| 808 |
/* This is popl %eax ; movl $,%eax ; int $0x80 */
|
| 809 |
val16 = 0xb858;
|
| 810 |
err |= __put_user(val16, (uint16_t *)(frame->retcode+0));
|
| 811 |
err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2)); |
| 812 |
val16 = 0x80cd;
|
| 813 |
err |= __put_user(val16, (uint16_t *)(frame->retcode+6));
|
| 814 |
} |
| 815 |
|
| 816 |
if (err)
|
| 817 |
goto give_sigsegv;
|
| 818 |
|
| 819 |
/* Set up registers for signal handler */
|
| 820 |
env->regs[R_ESP] = frame_addr; |
| 821 |
env->eip = ka->_sa_handler; |
| 822 |
|
| 823 |
cpu_x86_load_seg(env, R_DS, __USER_DS); |
| 824 |
cpu_x86_load_seg(env, R_ES, __USER_DS); |
| 825 |
cpu_x86_load_seg(env, R_SS, __USER_DS); |
| 826 |
cpu_x86_load_seg(env, R_CS, __USER_CS); |
| 827 |
env->eflags &= ~TF_MASK; |
| 828 |
|
| 829 |
unlock_user_struct(frame, frame_addr, 1);
|
| 830 |
|
| 831 |
return;
|
| 832 |
|
| 833 |
give_sigsegv:
|
| 834 |
unlock_user_struct(frame, frame_addr, 1);
|
| 835 |
if (sig == TARGET_SIGSEGV)
|
| 836 |
ka->_sa_handler = TARGET_SIG_DFL; |
| 837 |
force_sig(TARGET_SIGSEGV /* , current */);
|
| 838 |
} |
| 839 |
|
| 840 |
/* compare linux/arch/i386/kernel/signal.c:setup_rt_frame() */
|
| 841 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
| 842 |
target_siginfo_t *info, |
| 843 |
target_sigset_t *set, CPUX86State *env) |
| 844 |
{
|
| 845 |
abi_ulong frame_addr, addr; |
| 846 |
struct rt_sigframe *frame;
|
| 847 |
int i, err = 0; |
| 848 |
|
| 849 |
frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
| 850 |
|
| 851 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
| 852 |
goto give_sigsegv;
|
| 853 |
|
| 854 |
err |= __put_user(current_exec_domain_sig(sig), |
| 855 |
&frame->sig); |
| 856 |
addr = frame_addr + offsetof(struct rt_sigframe, info);
|
| 857 |
err |= __put_user(addr, &frame->pinfo); |
| 858 |
addr = frame_addr + offsetof(struct rt_sigframe, uc);
|
| 859 |
err |= __put_user(addr, &frame->puc); |
| 860 |
err |= copy_siginfo_to_user(&frame->info, info); |
| 861 |
if (err)
|
| 862 |
goto give_sigsegv;
|
| 863 |
|
| 864 |
/* Create the ucontext. */
|
| 865 |
err |= __put_user(0, &frame->uc.tuc_flags);
|
| 866 |
err |= __put_user(0, &frame->uc.tuc_link);
|
| 867 |
err |= __put_user(target_sigaltstack_used.ss_sp, |
| 868 |
&frame->uc.tuc_stack.ss_sp); |
| 869 |
err |= __put_user(sas_ss_flags(get_sp_from_cpustate(env)), |
| 870 |
&frame->uc.tuc_stack.ss_flags); |
| 871 |
err |= __put_user(target_sigaltstack_used.ss_size, |
| 872 |
&frame->uc.tuc_stack.ss_size); |
| 873 |
err |= setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate, |
| 874 |
env, set->sig[0],
|
| 875 |
frame_addr + offsetof(struct rt_sigframe, fpstate));
|
| 876 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
| 877 |
if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
|
| 878 |
goto give_sigsegv;
|
| 879 |
} |
| 880 |
|
| 881 |
/* Set up to return from userspace. If provided, use a stub
|
| 882 |
already in userspace. */
|
| 883 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
| 884 |
err |= __put_user(ka->sa_restorer, &frame->pretcode); |
| 885 |
} else {
|
| 886 |
uint16_t val16; |
| 887 |
addr = frame_addr + offsetof(struct rt_sigframe, retcode);
|
| 888 |
err |= __put_user(addr, &frame->pretcode); |
| 889 |
/* This is movl $,%eax ; int $0x80 */
|
| 890 |
err |= __put_user(0xb8, (char *)(frame->retcode+0)); |
| 891 |
err |= __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1)); |
| 892 |
val16 = 0x80cd;
|
| 893 |
err |= __put_user(val16, (uint16_t *)(frame->retcode+5));
|
| 894 |
} |
| 895 |
|
| 896 |
if (err)
|
| 897 |
goto give_sigsegv;
|
| 898 |
|
| 899 |
/* Set up registers for signal handler */
|
| 900 |
env->regs[R_ESP] = frame_addr; |
| 901 |
env->eip = ka->_sa_handler; |
| 902 |
|
| 903 |
cpu_x86_load_seg(env, R_DS, __USER_DS); |
| 904 |
cpu_x86_load_seg(env, R_ES, __USER_DS); |
| 905 |
cpu_x86_load_seg(env, R_SS, __USER_DS); |
| 906 |
cpu_x86_load_seg(env, R_CS, __USER_CS); |
| 907 |
env->eflags &= ~TF_MASK; |
| 908 |
|
| 909 |
unlock_user_struct(frame, frame_addr, 1);
|
| 910 |
|
| 911 |
return;
|
| 912 |
|
| 913 |
give_sigsegv:
|
| 914 |
unlock_user_struct(frame, frame_addr, 1);
|
| 915 |
if (sig == TARGET_SIGSEGV)
|
| 916 |
ka->_sa_handler = TARGET_SIG_DFL; |
| 917 |
force_sig(TARGET_SIGSEGV /* , current */);
|
| 918 |
} |
| 919 |
|
| 920 |
static int |
| 921 |
restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax) |
| 922 |
{
|
| 923 |
unsigned int err = 0; |
| 924 |
abi_ulong fpstate_addr; |
| 925 |
unsigned int tmpflags; |
| 926 |
|
| 927 |
cpu_x86_load_seg(env, R_GS, tswap16(sc->gs)); |
| 928 |
cpu_x86_load_seg(env, R_FS, tswap16(sc->fs)); |
| 929 |
cpu_x86_load_seg(env, R_ES, tswap16(sc->es)); |
| 930 |
cpu_x86_load_seg(env, R_DS, tswap16(sc->ds)); |
| 931 |
|
| 932 |
env->regs[R_EDI] = tswapl(sc->edi); |
| 933 |
env->regs[R_ESI] = tswapl(sc->esi); |
| 934 |
env->regs[R_EBP] = tswapl(sc->ebp); |
| 935 |
env->regs[R_ESP] = tswapl(sc->esp); |
| 936 |
env->regs[R_EBX] = tswapl(sc->ebx); |
| 937 |
env->regs[R_EDX] = tswapl(sc->edx); |
| 938 |
env->regs[R_ECX] = tswapl(sc->ecx); |
| 939 |
env->eip = tswapl(sc->eip); |
| 940 |
|
| 941 |
cpu_x86_load_seg(env, R_CS, lduw(&sc->cs) | 3);
|
| 942 |
cpu_x86_load_seg(env, R_SS, lduw(&sc->ss) | 3);
|
| 943 |
|
| 944 |
tmpflags = tswapl(sc->eflags); |
| 945 |
env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5); |
| 946 |
// regs->orig_eax = -1; /* disable syscall checks */
|
| 947 |
|
| 948 |
fpstate_addr = tswapl(sc->fpstate); |
| 949 |
if (fpstate_addr != 0) { |
| 950 |
if (!access_ok(VERIFY_READ, fpstate_addr,
|
| 951 |
sizeof(struct target_fpstate))) |
| 952 |
goto badframe;
|
| 953 |
cpu_x86_frstor(env, fpstate_addr, 1);
|
| 954 |
} |
| 955 |
|
| 956 |
*peax = tswapl(sc->eax); |
| 957 |
return err;
|
| 958 |
badframe:
|
| 959 |
return 1; |
| 960 |
} |
| 961 |
|
| 962 |
long do_sigreturn(CPUX86State *env)
|
| 963 |
{
|
| 964 |
struct sigframe *frame;
|
| 965 |
abi_ulong frame_addr = env->regs[R_ESP] - 8;
|
| 966 |
target_sigset_t target_set; |
| 967 |
sigset_t set; |
| 968 |
int eax, i;
|
| 969 |
|
| 970 |
#if defined(DEBUG_SIGNAL)
|
| 971 |
fprintf(stderr, "do_sigreturn\n");
|
| 972 |
#endif
|
| 973 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
| 974 |
goto badframe;
|
| 975 |
/* set blocked signals */
|
| 976 |
if (__get_user(target_set.sig[0], &frame->sc.oldmask)) |
| 977 |
goto badframe;
|
| 978 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
| 979 |
if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) |
| 980 |
goto badframe;
|
| 981 |
} |
| 982 |
|
| 983 |
target_to_host_sigset_internal(&set, &target_set); |
| 984 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
| 985 |
|
| 986 |
/* restore registers */
|
| 987 |
if (restore_sigcontext(env, &frame->sc, &eax))
|
| 988 |
goto badframe;
|
| 989 |
unlock_user_struct(frame, frame_addr, 0);
|
| 990 |
return eax;
|
| 991 |
|
| 992 |
badframe:
|
| 993 |
unlock_user_struct(frame, frame_addr, 0);
|
| 994 |
force_sig(TARGET_SIGSEGV); |
| 995 |
return 0; |
| 996 |
} |
| 997 |
|
| 998 |
long do_rt_sigreturn(CPUX86State *env)
|
| 999 |
{
|
| 1000 |
abi_ulong frame_addr; |
| 1001 |
struct rt_sigframe *frame;
|
| 1002 |
sigset_t set; |
| 1003 |
int eax;
|
| 1004 |
|
| 1005 |
frame_addr = env->regs[R_ESP] - 4;
|
| 1006 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
| 1007 |
goto badframe;
|
| 1008 |
target_to_host_sigset(&set, &frame->uc.tuc_sigmask); |
| 1009 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
| 1010 |
|
| 1011 |
if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax))
|
| 1012 |
goto badframe;
|
| 1013 |
|
| 1014 |
if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0, |
| 1015 |
get_sp_from_cpustate(env)) == -EFAULT) |
| 1016 |
goto badframe;
|
| 1017 |
|
| 1018 |
unlock_user_struct(frame, frame_addr, 0);
|
| 1019 |
return eax;
|
| 1020 |
|
| 1021 |
badframe:
|
| 1022 |
unlock_user_struct(frame, frame_addr, 0);
|
| 1023 |
force_sig(TARGET_SIGSEGV); |
| 1024 |
return 0; |
| 1025 |
} |
| 1026 |
|
| 1027 |
#elif defined(TARGET_ARM)
|
| 1028 |
|
| 1029 |
struct target_sigcontext {
|
| 1030 |
abi_ulong trap_no; |
| 1031 |
abi_ulong error_code; |
| 1032 |
abi_ulong oldmask; |
| 1033 |
abi_ulong arm_r0; |
| 1034 |
abi_ulong arm_r1; |
| 1035 |
abi_ulong arm_r2; |
| 1036 |
abi_ulong arm_r3; |
| 1037 |
abi_ulong arm_r4; |
| 1038 |
abi_ulong arm_r5; |
| 1039 |
abi_ulong arm_r6; |
| 1040 |
abi_ulong arm_r7; |
| 1041 |
abi_ulong arm_r8; |
| 1042 |
abi_ulong arm_r9; |
| 1043 |
abi_ulong arm_r10; |
| 1044 |
abi_ulong arm_fp; |
| 1045 |
abi_ulong arm_ip; |
| 1046 |
abi_ulong arm_sp; |
| 1047 |
abi_ulong arm_lr; |
| 1048 |
abi_ulong arm_pc; |
| 1049 |
abi_ulong arm_cpsr; |
| 1050 |
abi_ulong fault_address; |
| 1051 |
}; |
| 1052 |
|
| 1053 |
struct target_ucontext_v1 {
|
| 1054 |
abi_ulong tuc_flags; |
| 1055 |
abi_ulong tuc_link; |
| 1056 |
target_stack_t tuc_stack; |
| 1057 |
struct target_sigcontext tuc_mcontext;
|
| 1058 |
target_sigset_t tuc_sigmask; /* mask last for extensibility */
|
| 1059 |
}; |
| 1060 |
|
| 1061 |
struct target_ucontext_v2 {
|
| 1062 |
abi_ulong tuc_flags; |
| 1063 |
abi_ulong tuc_link; |
| 1064 |
target_stack_t tuc_stack; |
| 1065 |
struct target_sigcontext tuc_mcontext;
|
| 1066 |
target_sigset_t tuc_sigmask; /* mask last for extensibility */
|
| 1067 |
char __unused[128 - sizeof(sigset_t)]; |
| 1068 |
abi_ulong tuc_regspace[128] __attribute__((__aligned__(8))); |
| 1069 |
}; |
| 1070 |
|
| 1071 |
struct sigframe_v1
|
| 1072 |
{
|
| 1073 |
struct target_sigcontext sc;
|
| 1074 |
abi_ulong extramask[TARGET_NSIG_WORDS-1];
|
| 1075 |
abi_ulong retcode; |
| 1076 |
}; |
| 1077 |
|
| 1078 |
struct sigframe_v2
|
| 1079 |
{
|
| 1080 |
struct target_ucontext_v2 uc;
|
| 1081 |
abi_ulong retcode; |
| 1082 |
}; |
| 1083 |
|
| 1084 |
struct rt_sigframe_v1
|
| 1085 |
{
|
| 1086 |
abi_ulong pinfo; |
| 1087 |
abi_ulong puc; |
| 1088 |
struct target_siginfo info;
|
| 1089 |
struct target_ucontext_v1 uc;
|
| 1090 |
abi_ulong retcode; |
| 1091 |
}; |
| 1092 |
|
| 1093 |
struct rt_sigframe_v2
|
| 1094 |
{
|
| 1095 |
struct target_siginfo info;
|
| 1096 |
struct target_ucontext_v2 uc;
|
| 1097 |
abi_ulong retcode; |
| 1098 |
}; |
| 1099 |
|
| 1100 |
#define TARGET_CONFIG_CPU_32 1 |
| 1101 |
|
| 1102 |
/*
|
| 1103 |
* For ARM syscalls, we encode the syscall number into the instruction.
|
| 1104 |
*/
|
| 1105 |
#define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE)) |
| 1106 |
#define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE)) |
| 1107 |
|
| 1108 |
/*
|
| 1109 |
* For Thumb syscalls, we pass the syscall number via r7. We therefore
|
| 1110 |
* need two 16-bit instructions.
|
| 1111 |
*/
|
| 1112 |
#define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn)) |
| 1113 |
#define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn)) |
| 1114 |
|
| 1115 |
static const abi_ulong retcodes[4] = { |
| 1116 |
SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN, |
| 1117 |
SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN |
| 1118 |
}; |
| 1119 |
|
| 1120 |
|
| 1121 |
#define __get_user_error(x,p,e) __get_user(x, p)
|
| 1122 |
|
| 1123 |
static inline int valid_user_regs(CPUState *regs) |
| 1124 |
{
|
| 1125 |
return 1; |
| 1126 |
} |
| 1127 |
|
| 1128 |
static void |
| 1129 |
setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/ |
| 1130 |
CPUState *env, abi_ulong mask) |
| 1131 |
{
|
| 1132 |
__put_user(env->regs[0], &sc->arm_r0);
|
| 1133 |
__put_user(env->regs[1], &sc->arm_r1);
|
| 1134 |
__put_user(env->regs[2], &sc->arm_r2);
|
| 1135 |
__put_user(env->regs[3], &sc->arm_r3);
|
| 1136 |
__put_user(env->regs[4], &sc->arm_r4);
|
| 1137 |
__put_user(env->regs[5], &sc->arm_r5);
|
| 1138 |
__put_user(env->regs[6], &sc->arm_r6);
|
| 1139 |
__put_user(env->regs[7], &sc->arm_r7);
|
| 1140 |
__put_user(env->regs[8], &sc->arm_r8);
|
| 1141 |
__put_user(env->regs[9], &sc->arm_r9);
|
| 1142 |
__put_user(env->regs[10], &sc->arm_r10);
|
| 1143 |
__put_user(env->regs[11], &sc->arm_fp);
|
| 1144 |
__put_user(env->regs[12], &sc->arm_ip);
|
| 1145 |
__put_user(env->regs[13], &sc->arm_sp);
|
| 1146 |
__put_user(env->regs[14], &sc->arm_lr);
|
| 1147 |
__put_user(env->regs[15], &sc->arm_pc);
|
| 1148 |
#ifdef TARGET_CONFIG_CPU_32
|
| 1149 |
__put_user(cpsr_read(env), &sc->arm_cpsr); |
| 1150 |
#endif
|
| 1151 |
|
| 1152 |
__put_user(/* current->thread.trap_no */ 0, &sc->trap_no); |
| 1153 |
__put_user(/* current->thread.error_code */ 0, &sc->error_code); |
| 1154 |
__put_user(/* current->thread.address */ 0, &sc->fault_address); |
| 1155 |
__put_user(mask, &sc->oldmask); |
| 1156 |
} |
| 1157 |
|
| 1158 |
static inline abi_ulong |
| 1159 |
get_sigframe(struct target_sigaction *ka, CPUState *regs, int framesize) |
| 1160 |
{
|
| 1161 |
unsigned long sp = regs->regs[13]; |
| 1162 |
|
| 1163 |
/*
|
| 1164 |
* This is the X/Open sanctioned signal stack switching.
|
| 1165 |
*/
|
| 1166 |
if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp))
|
| 1167 |
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
| 1168 |
/*
|
| 1169 |
* ATPCS B01 mandates 8-byte alignment
|
| 1170 |
*/
|
| 1171 |
return (sp - framesize) & ~7; |
| 1172 |
} |
| 1173 |
|
| 1174 |
static int |
| 1175 |
setup_return(CPUState *env, struct target_sigaction *ka,
|
| 1176 |
abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr)
|
| 1177 |
{
|
| 1178 |
abi_ulong handler = ka->_sa_handler; |
| 1179 |
abi_ulong retcode; |
| 1180 |
int thumb = handler & 1; |
| 1181 |
|
| 1182 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
| 1183 |
retcode = ka->sa_restorer; |
| 1184 |
} else {
|
| 1185 |
unsigned int idx = thumb; |
| 1186 |
|
| 1187 |
if (ka->sa_flags & TARGET_SA_SIGINFO)
|
| 1188 |
idx += 2;
|
| 1189 |
|
| 1190 |
if (__put_user(retcodes[idx], rc))
|
| 1191 |
return 1; |
| 1192 |
#if 0
|
| 1193 |
flush_icache_range((abi_ulong)rc,
|
| 1194 |
(abi_ulong)(rc + 1));
|
| 1195 |
#endif
|
| 1196 |
retcode = rc_addr + thumb; |
| 1197 |
} |
| 1198 |
|
| 1199 |
env->regs[0] = usig;
|
| 1200 |
env->regs[13] = frame_addr;
|
| 1201 |
env->regs[14] = retcode;
|
| 1202 |
env->regs[15] = handler & (thumb ? ~1 : ~3); |
| 1203 |
env->thumb = thumb; |
| 1204 |
|
| 1205 |
#if 0
|
| 1206 |
#ifdef TARGET_CONFIG_CPU_32
|
| 1207 |
env->cpsr = cpsr;
|
| 1208 |
#endif
|
| 1209 |
#endif
|
| 1210 |
|
| 1211 |
return 0; |
| 1212 |
} |
| 1213 |
|
| 1214 |
static void setup_sigframe_v2(struct target_ucontext_v2 *uc, |
| 1215 |
target_sigset_t *set, CPUState *env) |
| 1216 |
{
|
| 1217 |
struct target_sigaltstack stack;
|
| 1218 |
int i;
|
| 1219 |
|
| 1220 |
/* Clear all the bits of the ucontext we don't use. */
|
| 1221 |
memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext)); |
| 1222 |
|
| 1223 |
memset(&stack, 0, sizeof(stack)); |
| 1224 |
__put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp); |
| 1225 |
__put_user(target_sigaltstack_used.ss_size, &stack.ss_size); |
| 1226 |
__put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags); |
| 1227 |
memcpy(&uc->tuc_stack, &stack, sizeof(stack));
|
| 1228 |
|
| 1229 |
setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]);
|
| 1230 |
/* FIXME: Save coprocessor signal frame. */
|
| 1231 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
| 1232 |
__put_user(set->sig[i], &uc->tuc_sigmask.sig[i]); |
| 1233 |
} |
| 1234 |
} |
| 1235 |
|
| 1236 |
/* compare linux/arch/arm/kernel/signal.c:setup_frame() */
|
| 1237 |
static void setup_frame_v1(int usig, struct target_sigaction *ka, |
| 1238 |
target_sigset_t *set, CPUState *regs) |
| 1239 |
{
|
| 1240 |
struct sigframe_v1 *frame;
|
| 1241 |
abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
|
| 1242 |
int i;
|
| 1243 |
|
| 1244 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
| 1245 |
return;
|
| 1246 |
|
| 1247 |
setup_sigcontext(&frame->sc, regs, set->sig[0]);
|
| 1248 |
|
| 1249 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
| 1250 |
if (__put_user(set->sig[i], &frame->extramask[i - 1])) |
| 1251 |
goto end;
|
| 1252 |
} |
| 1253 |
|
| 1254 |
setup_return(regs, ka, &frame->retcode, frame_addr, usig, |
| 1255 |
frame_addr + offsetof(struct sigframe_v1, retcode));
|
| 1256 |
|
| 1257 |
end:
|
| 1258 |
unlock_user_struct(frame, frame_addr, 1);
|
| 1259 |
} |
| 1260 |
|
| 1261 |
static void setup_frame_v2(int usig, struct target_sigaction *ka, |
| 1262 |
target_sigset_t *set, CPUState *regs) |
| 1263 |
{
|
| 1264 |
struct sigframe_v2 *frame;
|
| 1265 |
abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
|
| 1266 |
|
| 1267 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
| 1268 |
return;
|
| 1269 |
|
| 1270 |
setup_sigframe_v2(&frame->uc, set, regs); |
| 1271 |
|
| 1272 |
setup_return(regs, ka, &frame->retcode, frame_addr, usig, |
| 1273 |
frame_addr + offsetof(struct sigframe_v2, retcode));
|
| 1274 |
|
| 1275 |
unlock_user_struct(frame, frame_addr, 1);
|
| 1276 |
} |
| 1277 |
|
| 1278 |
static void setup_frame(int usig, struct target_sigaction *ka, |
| 1279 |
target_sigset_t *set, CPUState *regs) |
| 1280 |
{
|
| 1281 |
if (get_osversion() >= 0x020612) { |
| 1282 |
setup_frame_v2(usig, ka, set, regs); |
| 1283 |
} else {
|
| 1284 |
setup_frame_v1(usig, ka, set, regs); |
| 1285 |
} |
| 1286 |
} |
| 1287 |
|
| 1288 |
/* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */
|
| 1289 |
static void setup_rt_frame_v1(int usig, struct target_sigaction *ka, |
| 1290 |
target_siginfo_t *info, |
| 1291 |
target_sigset_t *set, CPUState *env) |
| 1292 |
{
|
| 1293 |
struct rt_sigframe_v1 *frame;
|
| 1294 |
abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
| 1295 |
struct target_sigaltstack stack;
|
| 1296 |
int i;
|
| 1297 |
abi_ulong info_addr, uc_addr; |
| 1298 |
|
| 1299 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
| 1300 |
return /* 1 */; |
| 1301 |
|
| 1302 |
info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info);
|
| 1303 |
__put_user(info_addr, &frame->pinfo); |
| 1304 |
uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc);
|
| 1305 |
__put_user(uc_addr, &frame->puc); |
| 1306 |
copy_siginfo_to_user(&frame->info, info); |
| 1307 |
|
| 1308 |
/* Clear all the bits of the ucontext we don't use. */
|
| 1309 |
memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext)); |
| 1310 |
|
| 1311 |
memset(&stack, 0, sizeof(stack)); |
| 1312 |
__put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp); |
| 1313 |
__put_user(target_sigaltstack_used.ss_size, &stack.ss_size); |
| 1314 |
__put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags); |
| 1315 |
memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
|
| 1316 |
|
| 1317 |
setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]);
|
| 1318 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
| 1319 |
if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
|
| 1320 |
goto end;
|
| 1321 |
} |
| 1322 |
|
| 1323 |
setup_return(env, ka, &frame->retcode, frame_addr, usig, |
| 1324 |
frame_addr + offsetof(struct rt_sigframe_v1, retcode));
|
| 1325 |
|
| 1326 |
env->regs[1] = info_addr;
|
| 1327 |
env->regs[2] = uc_addr;
|
| 1328 |
|
| 1329 |
end:
|
| 1330 |
unlock_user_struct(frame, frame_addr, 1);
|
| 1331 |
} |
| 1332 |
|
| 1333 |
static void setup_rt_frame_v2(int usig, struct target_sigaction *ka, |
| 1334 |
target_siginfo_t *info, |
| 1335 |
target_sigset_t *set, CPUState *env) |
| 1336 |
{
|
| 1337 |
struct rt_sigframe_v2 *frame;
|
| 1338 |
abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
| 1339 |
abi_ulong info_addr, uc_addr; |
| 1340 |
|
| 1341 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
| 1342 |
return /* 1 */; |
| 1343 |
|
| 1344 |
info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info);
|
| 1345 |
uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc);
|
| 1346 |
copy_siginfo_to_user(&frame->info, info); |
| 1347 |
|
| 1348 |
setup_sigframe_v2(&frame->uc, set, env); |
| 1349 |
|
| 1350 |
setup_return(env, ka, &frame->retcode, frame_addr, usig, |
| 1351 |
frame_addr + offsetof(struct rt_sigframe_v2, retcode));
|
| 1352 |
|
| 1353 |
env->regs[1] = info_addr;
|
| 1354 |
env->regs[2] = uc_addr;
|
| 1355 |
|
| 1356 |
unlock_user_struct(frame, frame_addr, 1);
|
| 1357 |
} |
| 1358 |
|
| 1359 |
static void setup_rt_frame(int usig, struct target_sigaction *ka, |
| 1360 |
target_siginfo_t *info, |
| 1361 |
target_sigset_t *set, CPUState *env) |
| 1362 |
{
|
| 1363 |
if (get_osversion() >= 0x020612) { |
| 1364 |
setup_rt_frame_v2(usig, ka, info, set, env); |
| 1365 |
} else {
|
| 1366 |
setup_rt_frame_v1(usig, ka, info, set, env); |
| 1367 |
} |
| 1368 |
} |
| 1369 |
|
| 1370 |
static int |
| 1371 |
restore_sigcontext(CPUState *env, struct target_sigcontext *sc)
|
| 1372 |
{
|
| 1373 |
int err = 0; |
| 1374 |
uint32_t cpsr; |
| 1375 |
|
| 1376 |
__get_user_error(env->regs[0], &sc->arm_r0, err);
|
| 1377 |
__get_user_error(env->regs[1], &sc->arm_r1, err);
|
| 1378 |
__get_user_error(env->regs[2], &sc->arm_r2, err);
|
| 1379 |
__get_user_error(env->regs[3], &sc->arm_r3, err);
|
| 1380 |
__get_user_error(env->regs[4], &sc->arm_r4, err);
|
| 1381 |
__get_user_error(env->regs[5], &sc->arm_r5, err);
|
| 1382 |
__get_user_error(env->regs[6], &sc->arm_r6, err);
|
| 1383 |
__get_user_error(env->regs[7], &sc->arm_r7, err);
|
| 1384 |
__get_user_error(env->regs[8], &sc->arm_r8, err);
|
| 1385 |
__get_user_error(env->regs[9], &sc->arm_r9, err);
|
| 1386 |
__get_user_error(env->regs[10], &sc->arm_r10, err);
|
| 1387 |
__get_user_error(env->regs[11], &sc->arm_fp, err);
|
| 1388 |
__get_user_error(env->regs[12], &sc->arm_ip, err);
|
| 1389 |
__get_user_error(env->regs[13], &sc->arm_sp, err);
|
| 1390 |
__get_user_error(env->regs[14], &sc->arm_lr, err);
|
| 1391 |
__get_user_error(env->regs[15], &sc->arm_pc, err);
|
| 1392 |
#ifdef TARGET_CONFIG_CPU_32
|
| 1393 |
__get_user_error(cpsr, &sc->arm_cpsr, err); |
| 1394 |
cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC); |
| 1395 |
#endif
|
| 1396 |
|
| 1397 |
err |= !valid_user_regs(env); |
| 1398 |
|
| 1399 |
return err;
|
| 1400 |
} |
| 1401 |
|
| 1402 |
static long do_sigreturn_v1(CPUState *env) |
| 1403 |
{
|
| 1404 |
abi_ulong frame_addr; |
| 1405 |
struct sigframe_v1 *frame;
|
| 1406 |
target_sigset_t set; |
| 1407 |
sigset_t host_set; |
| 1408 |
int i;
|
| 1409 |
|
| 1410 |
/*
|
| 1411 |
* Since we stacked the signal on a 64-bit boundary,
|
| 1412 |
* then 'sp' should be word aligned here. If it's
|
| 1413 |
* not, then the user is trying to mess with us.
|
| 1414 |
*/
|
| 1415 |
if (env->regs[13] & 7) |
| 1416 |
goto badframe;
|
| 1417 |
|
| 1418 |
frame_addr = env->regs[13];
|
| 1419 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
| 1420 |
goto badframe;
|
| 1421 |
|
| 1422 |
if (__get_user(set.sig[0], &frame->sc.oldmask)) |
| 1423 |
goto badframe;
|
| 1424 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
| 1425 |
if (__get_user(set.sig[i], &frame->extramask[i - 1])) |
| 1426 |
goto badframe;
|
| 1427 |
} |
| 1428 |
|
| 1429 |
target_to_host_sigset_internal(&host_set, &set); |
| 1430 |
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
| 1431 |
|
| 1432 |
if (restore_sigcontext(env, &frame->sc))
|
| 1433 |
goto badframe;
|
| 1434 |
|
| 1435 |
#if 0
|
| 1436 |
/* Send SIGTRAP if we're single-stepping */
|
| 1437 |
if (ptrace_cancel_bpt(current))
|
| 1438 |
send_sig(SIGTRAP, current, 1);
|
| 1439 |
#endif
|
| 1440 |
unlock_user_struct(frame, frame_addr, 0);
|
| 1441 |
return env->regs[0]; |
| 1442 |
|
| 1443 |
badframe:
|
| 1444 |
unlock_user_struct(frame, frame_addr, 0);
|
| 1445 |
force_sig(SIGSEGV /* , current */);
|
| 1446 |
return 0; |
| 1447 |
} |
| 1448 |
|
| 1449 |
static int do_sigframe_return_v2(CPUState *env, target_ulong frame_addr, |
| 1450 |
struct target_ucontext_v2 *uc)
|
| 1451 |
{
|
| 1452 |
sigset_t host_set; |
| 1453 |
|
| 1454 |
target_to_host_sigset(&host_set, &uc->tuc_sigmask); |
| 1455 |
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
| 1456 |
|
| 1457 |
if (restore_sigcontext(env, &uc->tuc_mcontext))
|
| 1458 |
return 1; |
| 1459 |
|
| 1460 |
if (do_sigaltstack(frame_addr + offsetof(struct target_ucontext_v2, tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) |
| 1461 |
return 1; |
| 1462 |
|
| 1463 |
#if 0
|
| 1464 |
/* Send SIGTRAP if we're single-stepping */
|
| 1465 |
if (ptrace_cancel_bpt(current))
|
| 1466 |
send_sig(SIGTRAP, current, 1);
|
| 1467 |
#endif
|
| 1468 |
|
| 1469 |
return 0; |
| 1470 |
} |
| 1471 |
|
| 1472 |
static long do_sigreturn_v2(CPUState *env) |
| 1473 |
{
|
| 1474 |
abi_ulong frame_addr; |
| 1475 |
struct sigframe_v2 *frame;
|
| 1476 |
|
| 1477 |
/*
|
| 1478 |
* Since we stacked the signal on a 64-bit boundary,
|
| 1479 |
* then 'sp' should be word aligned here. If it's
|
| 1480 |
* not, then the user is trying to mess with us.
|
| 1481 |
*/
|
| 1482 |
if (env->regs[13] & 7) |
| 1483 |
goto badframe;
|
| 1484 |
|
| 1485 |
frame_addr = env->regs[13];
|
| 1486 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
| 1487 |
goto badframe;
|
| 1488 |
|
| 1489 |
if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
|
| 1490 |
goto badframe;
|
| 1491 |
|
| 1492 |
unlock_user_struct(frame, frame_addr, 0);
|
| 1493 |
return env->regs[0]; |
| 1494 |
|
| 1495 |
badframe:
|
| 1496 |
unlock_user_struct(frame, frame_addr, 0);
|
| 1497 |
force_sig(SIGSEGV /* , current */);
|
| 1498 |
return 0; |
| 1499 |
} |
| 1500 |
|
| 1501 |
long do_sigreturn(CPUState *env)
|
| 1502 |
{
|
| 1503 |
if (get_osversion() >= 0x020612) { |
| 1504 |
return do_sigreturn_v2(env);
|
| 1505 |
} else {
|
| 1506 |
return do_sigreturn_v1(env);
|
| 1507 |
} |
| 1508 |
} |
| 1509 |
|
| 1510 |
static long do_rt_sigreturn_v1(CPUState *env) |
| 1511 |
{
|
| 1512 |
abi_ulong frame_addr; |
| 1513 |
struct rt_sigframe_v1 *frame;
|
| 1514 |
sigset_t host_set; |
| 1515 |
|
| 1516 |
/*
|
| 1517 |
* Since we stacked the signal on a 64-bit boundary,
|
| 1518 |
* then 'sp' should be word aligned here. If it's
|
| 1519 |
* not, then the user is trying to mess with us.
|
| 1520 |
*/
|
| 1521 |
if (env->regs[13] & 7) |
| 1522 |
goto badframe;
|
| 1523 |
|
| 1524 |
frame_addr = env->regs[13];
|
| 1525 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
| 1526 |
goto badframe;
|
| 1527 |
|
| 1528 |
target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask); |
| 1529 |
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
| 1530 |
|
| 1531 |
if (restore_sigcontext(env, &frame->uc.tuc_mcontext))
|
| 1532 |
goto badframe;
|
| 1533 |
|
| 1534 |
if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) |
| 1535 |
goto badframe;
|
| 1536 |
|
| 1537 |
#if 0
|
| 1538 |
/* Send SIGTRAP if we're single-stepping */
|
| 1539 |
if (ptrace_cancel_bpt(current))
|
| 1540 |
send_sig(SIGTRAP, current, 1);
|
| 1541 |
#endif
|
| 1542 |
unlock_user_struct(frame, frame_addr, 0);
|
| 1543 |
return env->regs[0]; |
| 1544 |
|
| 1545 |
badframe:
|
| 1546 |
unlock_user_struct(frame, frame_addr, 0);
|
| 1547 |
force_sig(SIGSEGV /* , current */);
|
| 1548 |
return 0; |
| 1549 |
} |
| 1550 |
|
| 1551 |
static long do_rt_sigreturn_v2(CPUState *env) |
| 1552 |
{
|
| 1553 |
abi_ulong frame_addr; |
| 1554 |
struct rt_sigframe_v2 *frame;
|
| 1555 |
|
| 1556 |
/*
|
| 1557 |
* Since we stacked the signal on a 64-bit boundary,
|
| 1558 |
* then 'sp' should be word aligned here. If it's
|
| 1559 |
* not, then the user is trying to mess with us.
|
| 1560 |
*/
|
| 1561 |
if (env->regs[13] & 7) |
| 1562 |
goto badframe;
|
| 1563 |
|
| 1564 |
frame_addr = env->regs[13];
|
| 1565 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
| 1566 |
goto badframe;
|
| 1567 |
|
| 1568 |
if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
|
| 1569 |
goto badframe;
|
| 1570 |
|
| 1571 |
unlock_user_struct(frame, frame_addr, 0);
|
| 1572 |
return env->regs[0]; |
| 1573 |
|
| 1574 |
badframe:
|
| 1575 |
unlock_user_struct(frame, frame_addr, 0);
|
| 1576 |
force_sig(SIGSEGV /* , current */);
|
| 1577 |
return 0; |
| 1578 |
} |
| 1579 |
|
| 1580 |
long do_rt_sigreturn(CPUState *env)
|
| 1581 |
{
|
| 1582 |
if (get_osversion() >= 0x020612) { |
| 1583 |
return do_rt_sigreturn_v2(env);
|
| 1584 |
} else {
|
| 1585 |
return do_rt_sigreturn_v1(env);
|
| 1586 |
} |
| 1587 |
} |
| 1588 |
|
| 1589 |
#elif defined(TARGET_SPARC)
|
| 1590 |
|
| 1591 |
#define __SUNOS_MAXWIN 31 |
| 1592 |
|
| 1593 |
/* This is what SunOS does, so shall I. */
|
| 1594 |
struct target_sigcontext {
|
| 1595 |
abi_ulong sigc_onstack; /* state to restore */
|
| 1596 |
|
| 1597 |
abi_ulong sigc_mask; /* sigmask to restore */
|
| 1598 |
abi_ulong sigc_sp; /* stack pointer */
|
| 1599 |
abi_ulong sigc_pc; /* program counter */
|
| 1600 |
abi_ulong sigc_npc; /* next program counter */
|
| 1601 |
abi_ulong sigc_psr; /* for condition codes etc */
|
| 1602 |
abi_ulong sigc_g1; /* User uses these two registers */
|
| 1603 |
abi_ulong sigc_o0; /* within the trampoline code. */
|
| 1604 |
|
| 1605 |
/* Now comes information regarding the users window set
|
| 1606 |
* at the time of the signal.
|
| 1607 |
*/
|
| 1608 |
abi_ulong sigc_oswins; /* outstanding windows */
|
| 1609 |
|
| 1610 |
/* stack ptrs for each regwin buf */
|
| 1611 |
char *sigc_spbuf[__SUNOS_MAXWIN];
|
| 1612 |
|
| 1613 |
/* Windows to restore after signal */
|
| 1614 |
struct {
|
| 1615 |
abi_ulong locals[8];
|
| 1616 |
abi_ulong ins[8];
|
| 1617 |
} sigc_wbuf[__SUNOS_MAXWIN]; |
| 1618 |
}; |
| 1619 |
/* A Sparc stack frame */
|
| 1620 |
struct sparc_stackf {
|
| 1621 |
abi_ulong locals[8];
|
| 1622 |
abi_ulong ins[6];
|
| 1623 |
struct sparc_stackf *fp;
|
| 1624 |
abi_ulong callers_pc; |
| 1625 |
char *structptr;
|
| 1626 |
abi_ulong xargs[6];
|
| 1627 |
abi_ulong xxargs[1];
|
| 1628 |
}; |
| 1629 |
|
| 1630 |
typedef struct { |
| 1631 |
struct {
|
| 1632 |
abi_ulong psr; |
| 1633 |
abi_ulong pc; |
| 1634 |
abi_ulong npc; |
| 1635 |
abi_ulong y; |
| 1636 |
abi_ulong u_regs[16]; /* globals and ins */ |
| 1637 |
} si_regs; |
| 1638 |
int si_mask;
|
| 1639 |
} __siginfo_t; |
| 1640 |
|
| 1641 |
typedef struct { |
| 1642 |
unsigned long si_float_regs [32]; |
| 1643 |
unsigned long si_fsr; |
| 1644 |
unsigned long si_fpqdepth; |
| 1645 |
struct {
|
| 1646 |
unsigned long *insn_addr; |
| 1647 |
unsigned long insn; |
| 1648 |
} si_fpqueue [16];
|
| 1649 |
} qemu_siginfo_fpu_t; |
| 1650 |
|
| 1651 |
|
| 1652 |
struct target_signal_frame {
|
| 1653 |
struct sparc_stackf ss;
|
| 1654 |
__siginfo_t info; |
| 1655 |
abi_ulong fpu_save; |
| 1656 |
abi_ulong insns[2] __attribute__ ((aligned (8))); |
| 1657 |
abi_ulong extramask[TARGET_NSIG_WORDS - 1];
|
| 1658 |
abi_ulong extra_size; /* Should be 0 */
|
| 1659 |
qemu_siginfo_fpu_t fpu_state; |
| 1660 |
}; |
| 1661 |
struct target_rt_signal_frame {
|
| 1662 |
struct sparc_stackf ss;
|
| 1663 |
siginfo_t info; |
| 1664 |
abi_ulong regs[20];
|
| 1665 |
sigset_t mask; |
| 1666 |
abi_ulong fpu_save; |
| 1667 |
unsigned int insns[2]; |
| 1668 |
stack_t stack; |
| 1669 |
unsigned int extra_size; /* Should be 0 */ |
| 1670 |
qemu_siginfo_fpu_t fpu_state; |
| 1671 |
}; |
| 1672 |
|
| 1673 |
#define UREG_O0 16 |
| 1674 |
#define UREG_O6 22 |
| 1675 |
#define UREG_I0 0 |
| 1676 |
#define UREG_I1 1 |
| 1677 |
#define UREG_I2 2 |
| 1678 |
#define UREG_I3 3 |
| 1679 |
#define UREG_I4 4 |
| 1680 |
#define UREG_I5 5 |
| 1681 |
#define UREG_I6 6 |
| 1682 |
#define UREG_I7 7 |
| 1683 |
#define UREG_L0 8 |
| 1684 |
#define UREG_FP UREG_I6
|
| 1685 |
#define UREG_SP UREG_O6
|
| 1686 |
|
| 1687 |
static inline abi_ulong get_sigframe(struct target_sigaction *sa, |
| 1688 |
CPUState *env, unsigned long framesize) |
| 1689 |
{
|
| 1690 |
abi_ulong sp; |
| 1691 |
|
| 1692 |
sp = env->regwptr[UREG_FP]; |
| 1693 |
|
| 1694 |
/* This is the X/Open sanctioned signal stack switching. */
|
| 1695 |
if (sa->sa_flags & TARGET_SA_ONSTACK) {
|
| 1696 |
if (!on_sig_stack(sp)
|
| 1697 |
&& !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7))
|
| 1698 |
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
| 1699 |
} |
| 1700 |
return sp - framesize;
|
| 1701 |
} |
| 1702 |
|
| 1703 |
static int |
| 1704 |
setup___siginfo(__siginfo_t *si, CPUState *env, abi_ulong mask) |
| 1705 |
{
|
| 1706 |
int err = 0, i; |
| 1707 |
|
| 1708 |
err |= __put_user(env->psr, &si->si_regs.psr); |
| 1709 |
err |= __put_user(env->pc, &si->si_regs.pc); |
| 1710 |
err |= __put_user(env->npc, &si->si_regs.npc); |
| 1711 |
err |= __put_user(env->y, &si->si_regs.y); |
| 1712 |
for (i=0; i < 8; i++) { |
| 1713 |
err |= __put_user(env->gregs[i], &si->si_regs.u_regs[i]); |
| 1714 |
} |
| 1715 |
for (i=0; i < 8; i++) { |
| 1716 |
err |= __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]);
|
| 1717 |
} |
| 1718 |
err |= __put_user(mask, &si->si_mask); |
| 1719 |
return err;
|
| 1720 |
} |
| 1721 |
|
| 1722 |
#if 0
|
| 1723 |
static int
|
| 1724 |
setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
|
| 1725 |
CPUState *env, unsigned long mask)
|
| 1726 |
{
|
| 1727 |
int err = 0;
|
| 1728 |
|
| 1729 |
err |= __put_user(mask, &sc->sigc_mask);
|
| 1730 |
err |= __put_user(env->regwptr[UREG_SP], &sc->sigc_sp);
|
| 1731 |
err |= __put_user(env->pc, &sc->sigc_pc);
|
| 1732 |
err |= __put_user(env->npc, &sc->sigc_npc);
|
| 1733 |
err |= __put_user(env->psr, &sc->sigc_psr);
|
| 1734 |
err |= __put_user(env->gregs[1], &sc->sigc_g1);
|
| 1735 |
err |= __put_user(env->regwptr[UREG_O0], &sc->sigc_o0);
|
| 1736 |
|
| 1737 |
return err;
|
| 1738 |
}
|
| 1739 |
#endif
|
| 1740 |
#define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7))) |
| 1741 |
|
| 1742 |
static void setup_frame(int sig, struct target_sigaction *ka, |
| 1743 |
target_sigset_t *set, CPUState *env) |
| 1744 |
{
|
| 1745 |
abi_ulong sf_addr; |
| 1746 |
struct target_signal_frame *sf;
|
| 1747 |
int sigframe_size, err, i;
|
| 1748 |
|
| 1749 |
/* 1. Make sure everything is clean */
|
| 1750 |
//synchronize_user_stack();
|
| 1751 |
|
| 1752 |
sigframe_size = NF_ALIGNEDSZ; |
| 1753 |
sf_addr = get_sigframe(ka, env, sigframe_size); |
| 1754 |
|
| 1755 |
sf = lock_user(VERIFY_WRITE, sf_addr, |
| 1756 |
sizeof(struct target_signal_frame), 0); |
| 1757 |
if (!sf)
|
| 1758 |
goto sigsegv;
|
| 1759 |
|
| 1760 |
//fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
|
| 1761 |
#if 0
|
| 1762 |
if (invalid_frame_pointer(sf, sigframe_size))
|
| 1763 |
goto sigill_and_return;
|
| 1764 |
#endif
|
| 1765 |
/* 2. Save the current process state */
|
| 1766 |
err = setup___siginfo(&sf->info, env, set->sig[0]);
|
| 1767 |
err |= __put_user(0, &sf->extra_size);
|
| 1768 |
|
| 1769 |
//err |= save_fpu_state(regs, &sf->fpu_state);
|
| 1770 |
//err |= __put_user(&sf->fpu_state, &sf->fpu_save);
|
| 1771 |
|
| 1772 |
err |= __put_user(set->sig[0], &sf->info.si_mask);
|
| 1773 |
for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) { |
| 1774 |
err |= __put_user(set->sig[i + 1], &sf->extramask[i]);
|
| 1775 |
} |
| 1776 |
|
| 1777 |
for (i = 0; i < 8; i++) { |
| 1778 |
err |= __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]); |
| 1779 |
} |
| 1780 |
for (i = 0; i < 8; i++) { |
| 1781 |
err |= __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]); |
| 1782 |
} |
| 1783 |
if (err)
|
| 1784 |
goto sigsegv;
|
| 1785 |
|
| 1786 |
/* 3. signal handler back-trampoline and parameters */
|
| 1787 |
env->regwptr[UREG_FP] = sf_addr; |
| 1788 |
env->regwptr[UREG_I0] = sig; |
| 1789 |
env->regwptr[UREG_I1] = sf_addr + |
| 1790 |
offsetof(struct target_signal_frame, info);
|
| 1791 |
env->regwptr[UREG_I2] = sf_addr + |
| 1792 |
offsetof(struct target_signal_frame, info);
|
| 1793 |
|
| 1794 |
/* 4. signal handler */
|
| 1795 |
env->pc = ka->_sa_handler; |
| 1796 |
env->npc = (env->pc + 4);
|
| 1797 |
/* 5. return to kernel instructions */
|
| 1798 |
if (ka->sa_restorer)
|
| 1799 |
env->regwptr[UREG_I7] = ka->sa_restorer; |
| 1800 |
else {
|
| 1801 |
uint32_t val32; |
| 1802 |
|
| 1803 |
env->regwptr[UREG_I7] = sf_addr + |
| 1804 |
offsetof(struct target_signal_frame, insns) - 2 * 4; |
| 1805 |
|
| 1806 |
/* mov __NR_sigreturn, %g1 */
|
| 1807 |
val32 = 0x821020d8;
|
| 1808 |
err |= __put_user(val32, &sf->insns[0]);
|
| 1809 |
|
| 1810 |
/* t 0x10 */
|
| 1811 |
val32 = 0x91d02010;
|
| 1812 |
err |= __put_user(val32, &sf->insns[1]);
|
| 1813 |
if (err)
|
| 1814 |
goto sigsegv;
|
| 1815 |
|
| 1816 |
/* Flush instruction space. */
|
| 1817 |
//flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
|
| 1818 |
// tb_flush(env);
|
| 1819 |
} |
| 1820 |
unlock_user(sf, sf_addr, sizeof(struct target_signal_frame)); |
| 1821 |
return;
|
| 1822 |
#if 0
|
| 1823 |
sigill_and_return:
|
| 1824 |
force_sig(TARGET_SIGILL);
|
| 1825 |
#endif
|
| 1826 |
sigsegv:
|
| 1827 |
//fprintf(stderr, "force_sig\n");
|
| 1828 |
unlock_user(sf, sf_addr, sizeof(struct target_signal_frame)); |
| 1829 |
force_sig(TARGET_SIGSEGV); |
| 1830 |
} |
| 1831 |
static inline int |
| 1832 |
restore_fpu_state(CPUState *env, qemu_siginfo_fpu_t *fpu) |
| 1833 |
{
|
| 1834 |
int err;
|
| 1835 |
#if 0
|
| 1836 |
#ifdef CONFIG_SMP
|
| 1837 |
if (current->flags & PF_USEDFPU)
|
| 1838 |
regs->psr &= ~PSR_EF;
|
| 1839 |
#else
|
| 1840 |
if (current == last_task_used_math) {
|
| 1841 |
last_task_used_math = 0;
|
| 1842 |
regs->psr &= ~PSR_EF; |
| 1843 |
} |
| 1844 |
#endif
|
| 1845 |
current->used_math = 1;
|
| 1846 |
current->flags &= ~PF_USEDFPU; |
| 1847 |
#endif
|
| 1848 |
#if 0
|
| 1849 |
if (verify_area (VERIFY_READ, fpu, sizeof(*fpu)))
|
| 1850 |
return -EFAULT;
|
| 1851 |
#endif
|
| 1852 |
|
| 1853 |
#if 0
|
| 1854 |
/* XXX: incorrect */
|
| 1855 |
err = __copy_from_user(&env->fpr[0], &fpu->si_float_regs[0],
|
| 1856 |
(sizeof(unsigned long) * 32));
|
| 1857 |
#endif
|
| 1858 |
err |= __get_user(env->fsr, &fpu->si_fsr); |
| 1859 |
#if 0
|
| 1860 |
err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
|
| 1861 |
if (current->thread.fpqdepth != 0)
|
| 1862 |
err |= __copy_from_user(¤t->thread.fpqueue[0],
|
| 1863 |
&fpu->si_fpqueue[0],
|
| 1864 |
((sizeof(unsigned long) +
|
| 1865 |
(sizeof(unsigned long *)))*16));
|
| 1866 |
#endif
|
| 1867 |
return err;
|
| 1868 |
} |
| 1869 |
|
| 1870 |
|
| 1871 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
| 1872 |
target_siginfo_t *info, |
| 1873 |
target_sigset_t *set, CPUState *env) |
| 1874 |
{
|
| 1875 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
| 1876 |
} |
| 1877 |
|
| 1878 |
long do_sigreturn(CPUState *env)
|
| 1879 |
{
|
| 1880 |
abi_ulong sf_addr; |
| 1881 |
struct target_signal_frame *sf;
|
| 1882 |
uint32_t up_psr, pc, npc; |
| 1883 |
target_sigset_t set; |
| 1884 |
sigset_t host_set; |
| 1885 |
abi_ulong fpu_save_addr; |
| 1886 |
int err, i;
|
| 1887 |
|
| 1888 |
sf_addr = env->regwptr[UREG_FP]; |
| 1889 |
if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1)) |
| 1890 |
goto segv_and_exit;
|
| 1891 |
#if 0
|
| 1892 |
fprintf(stderr, "sigreturn\n");
|
| 1893 |
fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
|
| 1894 |
#endif
|
| 1895 |
//cpu_dump_state(env, stderr, fprintf, 0);
|
| 1896 |
|
| 1897 |
/* 1. Make sure we are not getting garbage from the user */
|
| 1898 |
|
| 1899 |
if (sf_addr & 3) |
| 1900 |
goto segv_and_exit;
|
| 1901 |
|
| 1902 |
err = __get_user(pc, &sf->info.si_regs.pc); |
| 1903 |
err |= __get_user(npc, &sf->info.si_regs.npc); |
| 1904 |
|
| 1905 |
if ((pc | npc) & 3) |
| 1906 |
goto segv_and_exit;
|
| 1907 |
|
| 1908 |
/* 2. Restore the state */
|
| 1909 |
err |= __get_user(up_psr, &sf->info.si_regs.psr); |
| 1910 |
|
| 1911 |
/* User can only change condition codes and FPU enabling in %psr. */
|
| 1912 |
env->psr = (up_psr & (PSR_ICC /* | PSR_EF */))
|
| 1913 |
| (env->psr & ~(PSR_ICC /* | PSR_EF */));
|
| 1914 |
|
| 1915 |
env->pc = pc; |
| 1916 |
env->npc = npc; |
| 1917 |
err |= __get_user(env->y, &sf->info.si_regs.y); |
| 1918 |
for (i=0; i < 8; i++) { |
| 1919 |
err |= __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]); |
| 1920 |
} |
| 1921 |
for (i=0; i < 8; i++) { |
| 1922 |
err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]);
|
| 1923 |
} |
| 1924 |
|
| 1925 |
err |= __get_user(fpu_save_addr, &sf->fpu_save); |
| 1926 |
|
| 1927 |
//if (fpu_save)
|
| 1928 |
// err |= restore_fpu_state(env, fpu_save);
|
| 1929 |
|
| 1930 |
/* This is pretty much atomic, no amount locking would prevent
|
| 1931 |
* the races which exist anyways.
|
| 1932 |
*/
|
| 1933 |
err |= __get_user(set.sig[0], &sf->info.si_mask);
|
| 1934 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
| 1935 |
err |= (__get_user(set.sig[i], &sf->extramask[i - 1]));
|
| 1936 |
} |
| 1937 |
|
| 1938 |
target_to_host_sigset_internal(&host_set, &set); |
| 1939 |
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
| 1940 |
|
| 1941 |
if (err)
|
| 1942 |
goto segv_and_exit;
|
| 1943 |
unlock_user_struct(sf, sf_addr, 0);
|
| 1944 |
return env->regwptr[0]; |
| 1945 |
|
| 1946 |
segv_and_exit:
|
| 1947 |
unlock_user_struct(sf, sf_addr, 0);
|
| 1948 |
force_sig(TARGET_SIGSEGV); |
| 1949 |
} |
| 1950 |
|
| 1951 |
long do_rt_sigreturn(CPUState *env)
|
| 1952 |
{
|
| 1953 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
| 1954 |
return -TARGET_ENOSYS;
|
| 1955 |
} |
| 1956 |
|
| 1957 |
#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
|
| 1958 |
#define MC_TSTATE 0 |
| 1959 |
#define MC_PC 1 |
| 1960 |
#define MC_NPC 2 |
| 1961 |
#define MC_Y 3 |
| 1962 |
#define MC_G1 4 |
| 1963 |
#define MC_G2 5 |
| 1964 |
#define MC_G3 6 |
| 1965 |
#define MC_G4 7 |
| 1966 |
#define MC_G5 8 |
| 1967 |
#define MC_G6 9 |
| 1968 |
#define MC_G7 10 |
| 1969 |
#define MC_O0 11 |
| 1970 |
#define MC_O1 12 |
| 1971 |
#define MC_O2 13 |
| 1972 |
#define MC_O3 14 |
| 1973 |
#define MC_O4 15 |
| 1974 |
#define MC_O5 16 |
| 1975 |
#define MC_O6 17 |
| 1976 |
#define MC_O7 18 |
| 1977 |
#define MC_NGREG 19 |
| 1978 |
|
| 1979 |
typedef abi_ulong target_mc_greg_t;
|
| 1980 |
typedef target_mc_greg_t target_mc_gregset_t[MC_NGREG];
|
| 1981 |
|
| 1982 |
struct target_mc_fq {
|
| 1983 |
abi_ulong *mcfq_addr; |
| 1984 |
uint32_t mcfq_insn; |
| 1985 |
}; |
| 1986 |
|
| 1987 |
struct target_mc_fpu {
|
| 1988 |
union {
|
| 1989 |
uint32_t sregs[32];
|
| 1990 |
uint64_t dregs[32];
|
| 1991 |
//uint128_t qregs[16];
|
| 1992 |
} mcfpu_fregs; |
| 1993 |
abi_ulong mcfpu_fsr; |
| 1994 |
abi_ulong mcfpu_fprs; |
| 1995 |
abi_ulong mcfpu_gsr; |
| 1996 |
struct target_mc_fq *mcfpu_fq;
|
| 1997 |
unsigned char mcfpu_qcnt; |
| 1998 |
unsigned char mcfpu_qentsz; |
| 1999 |
unsigned char mcfpu_enab; |
| 2000 |
}; |
| 2001 |
typedef struct target_mc_fpu target_mc_fpu_t; |
| 2002 |
|
| 2003 |
typedef struct { |
| 2004 |
target_mc_gregset_t mc_gregs; |
| 2005 |
target_mc_greg_t mc_fp; |
| 2006 |
target_mc_greg_t mc_i7; |
| 2007 |
target_mc_fpu_t mc_fpregs; |
| 2008 |
} target_mcontext_t; |
| 2009 |
|
| 2010 |
struct target_ucontext {
|
| 2011 |
struct target_ucontext *uc_link;
|
| 2012 |
abi_ulong uc_flags; |
| 2013 |
target_sigset_t uc_sigmask; |
| 2014 |
target_mcontext_t uc_mcontext; |
| 2015 |
}; |
| 2016 |
|
| 2017 |
/* A V9 register window */
|
| 2018 |
struct target_reg_window {
|
| 2019 |
abi_ulong locals[8];
|
| 2020 |
abi_ulong ins[8];
|
| 2021 |
}; |
| 2022 |
|
| 2023 |
#define TARGET_STACK_BIAS 2047 |
| 2024 |
|
| 2025 |
/* {set, get}context() needed for 64-bit SparcLinux userland. */
|
| 2026 |
void sparc64_set_context(CPUSPARCState *env)
|
| 2027 |
{
|
| 2028 |
abi_ulong ucp_addr; |
| 2029 |
struct target_ucontext *ucp;
|
| 2030 |
target_mc_gregset_t *grp; |
| 2031 |
abi_ulong pc, npc, tstate; |
| 2032 |
abi_ulong fp, i7, w_addr; |
| 2033 |
unsigned char fenab; |
| 2034 |
int err;
|
| 2035 |
unsigned int i; |
| 2036 |
|
| 2037 |
ucp_addr = env->regwptr[UREG_I0]; |
| 2038 |
if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1)) |
| 2039 |
goto do_sigsegv;
|
| 2040 |
grp = &ucp->uc_mcontext.mc_gregs; |
| 2041 |
err = __get_user(pc, &((*grp)[MC_PC])); |
| 2042 |
err |= __get_user(npc, &((*grp)[MC_NPC])); |
| 2043 |
if (err || ((pc | npc) & 3)) |
| 2044 |
goto do_sigsegv;
|
| 2045 |
if (env->regwptr[UREG_I1]) {
|
| 2046 |
target_sigset_t target_set; |
| 2047 |
sigset_t set; |
| 2048 |
|
| 2049 |
if (TARGET_NSIG_WORDS == 1) { |
| 2050 |
if (__get_user(target_set.sig[0], &ucp->uc_sigmask.sig[0])) |
| 2051 |
goto do_sigsegv;
|
| 2052 |
} else {
|
| 2053 |
abi_ulong *src, *dst; |
| 2054 |
src = ucp->uc_sigmask.sig; |
| 2055 |
dst = target_set.sig; |
| 2056 |
for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong); |
| 2057 |
i++, dst++, src++) |
| 2058 |
err |= __get_user(*dst, src); |
| 2059 |
if (err)
|
| 2060 |
goto do_sigsegv;
|
| 2061 |
} |
| 2062 |
target_to_host_sigset_internal(&set, &target_set); |
| 2063 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
| 2064 |
} |
| 2065 |
env->pc = pc; |
| 2066 |
env->npc = npc; |
| 2067 |
err |= __get_user(env->y, &((*grp)[MC_Y])); |
| 2068 |
err |= __get_user(tstate, &((*grp)[MC_TSTATE])); |
| 2069 |
env->asi = (tstate >> 24) & 0xff; |
| 2070 |
PUT_CCR(env, tstate >> 32);
|
| 2071 |
PUT_CWP64(env, tstate & 0x1f);
|
| 2072 |
err |= __get_user(env->gregs[1], (&(*grp)[MC_G1]));
|
| 2073 |
err |= __get_user(env->gregs[2], (&(*grp)[MC_G2]));
|
| 2074 |
err |= __get_user(env->gregs[3], (&(*grp)[MC_G3]));
|
| 2075 |
err |= __get_user(env->gregs[4], (&(*grp)[MC_G4]));
|
| 2076 |
err |= __get_user(env->gregs[5], (&(*grp)[MC_G5]));
|
| 2077 |
err |= __get_user(env->gregs[6], (&(*grp)[MC_G6]));
|
| 2078 |
err |= __get_user(env->gregs[7], (&(*grp)[MC_G7]));
|
| 2079 |
err |= __get_user(env->regwptr[UREG_I0], (&(*grp)[MC_O0])); |
| 2080 |
err |= __get_user(env->regwptr[UREG_I1], (&(*grp)[MC_O1])); |
| 2081 |
err |= __get_user(env->regwptr[UREG_I2], (&(*grp)[MC_O2])); |
| 2082 |
err |= __get_user(env->regwptr[UREG_I3], (&(*grp)[MC_O3])); |
| 2083 |
err |= __get_user(env->regwptr[UREG_I4], (&(*grp)[MC_O4])); |
| 2084 |
err |= __get_user(env->regwptr[UREG_I5], (&(*grp)[MC_O5])); |
| 2085 |
err |= __get_user(env->regwptr[UREG_I6], (&(*grp)[MC_O6])); |
| 2086 |
err |= __get_user(env->regwptr[UREG_I7], (&(*grp)[MC_O7])); |
| 2087 |
|
| 2088 |
err |= __get_user(fp, &(ucp->uc_mcontext.mc_fp)); |
| 2089 |
err |= __get_user(i7, &(ucp->uc_mcontext.mc_i7)); |
| 2090 |
|
| 2091 |
w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6]; |
| 2092 |
if (put_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]), |
| 2093 |
abi_ulong) != 0)
|
| 2094 |
goto do_sigsegv;
|
| 2095 |
if (put_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]), |
| 2096 |
abi_ulong) != 0)
|
| 2097 |
goto do_sigsegv;
|
| 2098 |
err |= __get_user(fenab, &(ucp->uc_mcontext.mc_fpregs.mcfpu_enab)); |
| 2099 |
err |= __get_user(env->fprs, &(ucp->uc_mcontext.mc_fpregs.mcfpu_fprs)); |
| 2100 |
{
|
| 2101 |
uint32_t *src, *dst; |
| 2102 |
src = ucp->uc_mcontext.mc_fpregs.mcfpu_fregs.sregs; |
| 2103 |
dst = env->fpr; |
| 2104 |
/* XXX: check that the CPU storage is the same as user context */
|
| 2105 |
for (i = 0; i < 64; i++, dst++, src++) |
| 2106 |
err |= __get_user(*dst, src); |
| 2107 |
} |
| 2108 |
err |= __get_user(env->fsr, |
| 2109 |
&(ucp->uc_mcontext.mc_fpregs.mcfpu_fsr)); |
| 2110 |
err |= __get_user(env->gsr, |
| 2111 |
&(ucp->uc_mcontext.mc_fpregs.mcfpu_gsr)); |
| 2112 |
if (err)
|
| 2113 |
goto do_sigsegv;
|
| 2114 |
unlock_user_struct(ucp, ucp_addr, 0);
|
| 2115 |
return;
|
| 2116 |
do_sigsegv:
|
| 2117 |
unlock_user_struct(ucp, ucp_addr, 0);
|
| 2118 |
force_sig(SIGSEGV); |
| 2119 |
} |
| 2120 |
|
| 2121 |
void sparc64_get_context(CPUSPARCState *env)
|
| 2122 |
{
|
| 2123 |
abi_ulong ucp_addr; |
| 2124 |
struct target_ucontext *ucp;
|
| 2125 |
target_mc_gregset_t *grp; |
| 2126 |
target_mcontext_t *mcp; |
| 2127 |
abi_ulong fp, i7, w_addr; |
| 2128 |
int err;
|
| 2129 |
unsigned int i; |
| 2130 |
target_sigset_t target_set; |
| 2131 |
sigset_t set; |
| 2132 |
|
| 2133 |
ucp_addr = env->regwptr[UREG_I0]; |
| 2134 |
if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0)) |
| 2135 |
goto do_sigsegv;
|
| 2136 |
|
| 2137 |
mcp = &ucp->uc_mcontext; |
| 2138 |
grp = &mcp->mc_gregs; |
| 2139 |
|
| 2140 |
/* Skip over the trap instruction, first. */
|
| 2141 |
env->pc = env->npc; |
| 2142 |
env->npc += 4;
|
| 2143 |
|
| 2144 |
err = 0;
|
| 2145 |
|
| 2146 |
sigprocmask(0, NULL, &set); |
| 2147 |
host_to_target_sigset_internal(&target_set, &set); |
| 2148 |
if (TARGET_NSIG_WORDS == 1) { |
| 2149 |
err |= __put_user(target_set.sig[0],
|
| 2150 |
(abi_ulong *)&ucp->uc_sigmask); |
| 2151 |
} else {
|
| 2152 |
abi_ulong *src, *dst; |
| 2153 |
src = target_set.sig; |
| 2154 |
dst = ucp->uc_sigmask.sig; |
| 2155 |
for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong); |
| 2156 |
i++, dst++, src++) |
| 2157 |
err |= __put_user(*src, dst); |
| 2158 |
if (err)
|
| 2159 |
goto do_sigsegv;
|
| 2160 |
} |
| 2161 |
|
| 2162 |
/* XXX: tstate must be saved properly */
|
| 2163 |
// err |= __put_user(env->tstate, &((*grp)[MC_TSTATE]));
|
| 2164 |
err |= __put_user(env->pc, &((*grp)[MC_PC])); |
| 2165 |
err |= __put_user(env->npc, &((*grp)[MC_NPC])); |
| 2166 |
err |= __put_user(env->y, &((*grp)[MC_Y])); |
| 2167 |
err |= __put_user(env->gregs[1], &((*grp)[MC_G1]));
|
| 2168 |
err |= __put_user(env->gregs[2], &((*grp)[MC_G2]));
|
| 2169 |
err |= __put_user(env->gregs[3], &((*grp)[MC_G3]));
|
| 2170 |
err |= __put_user(env->gregs[4], &((*grp)[MC_G4]));
|
| 2171 |
err |= __put_user(env->gregs[5], &((*grp)[MC_G5]));
|
| 2172 |
err |= __put_user(env->gregs[6], &((*grp)[MC_G6]));
|
| 2173 |
err |= __put_user(env->gregs[7], &((*grp)[MC_G7]));
|
| 2174 |
err |= __put_user(env->regwptr[UREG_I0], &((*grp)[MC_O0])); |
| 2175 |
err |= __put_user(env->regwptr[UREG_I1], &((*grp)[MC_O1])); |
| 2176 |
err |= __put_user(env->regwptr[UREG_I2], &((*grp)[MC_O2])); |
| 2177 |
err |= __put_user(env->regwptr[UREG_I3], &((*grp)[MC_O3])); |
| 2178 |
err |= __put_user(env->regwptr[UREG_I4], &((*grp)[MC_O4])); |
| 2179 |
err |= __put_user(env->regwptr[UREG_I5], &((*grp)[MC_O5])); |
| 2180 |
err |= __put_user(env->regwptr[UREG_I6], &((*grp)[MC_O6])); |
| 2181 |
err |= __put_user(env->regwptr[UREG_I7], &((*grp)[MC_O7])); |
| 2182 |
|
| 2183 |
w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6]; |
| 2184 |
fp = i7 = 0;
|
| 2185 |
if (get_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]), |
| 2186 |
abi_ulong) != 0)
|
| 2187 |
goto do_sigsegv;
|
| 2188 |
if (get_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]), |
| 2189 |
abi_ulong) != 0)
|
| 2190 |
goto do_sigsegv;
|
| 2191 |
err |= __put_user(fp, &(mcp->mc_fp)); |
| 2192 |
err |= __put_user(i7, &(mcp->mc_i7)); |
| 2193 |
|
| 2194 |
{
|
| 2195 |
uint32_t *src, *dst; |
| 2196 |
src = env->fpr; |
| 2197 |
dst = ucp->uc_mcontext.mc_fpregs.mcfpu_fregs.sregs; |
| 2198 |
/* XXX: check that the CPU storage is the same as user context */
|
| 2199 |
for (i = 0; i < 64; i++, dst++, src++) |
| 2200 |
err |= __put_user(*src, dst); |
| 2201 |
} |
| 2202 |
err |= __put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr)); |
| 2203 |
err |= __put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr)); |
| 2204 |
err |= __put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs)); |
| 2205 |
|
| 2206 |
if (err)
|
| 2207 |
goto do_sigsegv;
|
| 2208 |
unlock_user_struct(ucp, ucp_addr, 1);
|
| 2209 |
return;
|
| 2210 |
do_sigsegv:
|
| 2211 |
unlock_user_struct(ucp, ucp_addr, 1);
|
| 2212 |
force_sig(SIGSEGV); |
| 2213 |
} |
| 2214 |
#endif
|
| 2215 |
#elif defined(TARGET_ABI_MIPSN64)
|
| 2216 |
|
| 2217 |
# warning signal handling not implemented
|
| 2218 |
|
| 2219 |
static void setup_frame(int sig, struct target_sigaction *ka, |
| 2220 |
target_sigset_t *set, CPUState *env) |
| 2221 |
{
|
| 2222 |
fprintf(stderr, "setup_frame: not implemented\n");
|
| 2223 |
} |
| 2224 |
|
| 2225 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
| 2226 |
target_siginfo_t *info, |
| 2227 |
target_sigset_t *set, CPUState *env) |
| 2228 |
{
|
| 2229 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
| 2230 |
} |
| 2231 |
|
| 2232 |
long do_sigreturn(CPUState *env)
|
| 2233 |
{
|
| 2234 |
fprintf(stderr, "do_sigreturn: not implemented\n");
|
| 2235 |
return -TARGET_ENOSYS;
|
| 2236 |
} |
| 2237 |
|
| 2238 |
long do_rt_sigreturn(CPUState *env)
|
| 2239 |
{
|
| 2240 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
| 2241 |
return -TARGET_ENOSYS;
|
| 2242 |
} |
| 2243 |
|
| 2244 |
#elif defined(TARGET_ABI_MIPSN32)
|
| 2245 |
|
| 2246 |
# warning signal handling not implemented
|
| 2247 |
|
| 2248 |
static void setup_frame(int sig, struct target_sigaction *ka, |
| 2249 |
target_sigset_t *set, CPUState *env) |
| 2250 |
{
|
| 2251 |
fprintf(stderr, "setup_frame: not implemented\n");
|
| 2252 |
} |
| 2253 |
|
| 2254 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
| 2255 |
target_siginfo_t *info, |
| 2256 |
target_sigset_t *set, CPUState *env) |
| 2257 |
{
|
| 2258 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
| 2259 |
} |
| 2260 |
|
| 2261 |
long do_sigreturn(CPUState *env)
|
| 2262 |
{
|
| 2263 |
fprintf(stderr, "do_sigreturn: not implemented\n");
|
| 2264 |
return -TARGET_ENOSYS;
|
| 2265 |
} |
| 2266 |
|
| 2267 |
long do_rt_sigreturn(CPUState *env)
|
| 2268 |
{
|
| 2269 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
| 2270 |
return -TARGET_ENOSYS;
|
| 2271 |
} |
| 2272 |
|
| 2273 |
#elif defined(TARGET_ABI_MIPSO32)
|
| 2274 |
|
| 2275 |
struct target_sigcontext {
|
| 2276 |
uint32_t sc_regmask; /* Unused */
|
| 2277 |
uint32_t sc_status; |
| 2278 |
uint64_t sc_pc; |
| 2279 |
uint64_t sc_regs[32];
|
| 2280 |
uint64_t sc_fpregs[32];
|
| 2281 |
uint32_t sc_ownedfp; /* Unused */
|
| 2282 |
uint32_t sc_fpc_csr; |
| 2283 |
uint32_t sc_fpc_eir; /* Unused */
|
| 2284 |
uint32_t sc_used_math; |
| 2285 |
uint32_t sc_dsp; /* dsp status, was sc_ssflags */
|
| 2286 |
uint64_t sc_mdhi; |
| 2287 |
uint64_t sc_mdlo; |
| 2288 |
target_ulong sc_hi1; /* Was sc_cause */
|
| 2289 |
target_ulong sc_lo1; /* Was sc_badvaddr */
|
| 2290 |
target_ulong sc_hi2; /* Was sc_sigset[4] */
|
| 2291 |
target_ulong sc_lo2; |
| 2292 |
target_ulong sc_hi3; |
| 2293 |
target_ulong sc_lo3; |
| 2294 |
}; |
| 2295 |
|
| 2296 |
struct sigframe {
|
| 2297 |
uint32_t sf_ass[4]; /* argument save space for o32 */ |
| 2298 |
uint32_t sf_code[2]; /* signal trampoline */ |
| 2299 |
struct target_sigcontext sf_sc;
|
| 2300 |
target_sigset_t sf_mask; |
| 2301 |
}; |
| 2302 |
|
| 2303 |
/* Install trampoline to jump back from signal handler */
|
| 2304 |
static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall) |
| 2305 |
{
|
| 2306 |
int err;
|
| 2307 |
|
| 2308 |
/*
|
| 2309 |
* Set up the return code ...
|
| 2310 |
*
|
| 2311 |
* li v0, __NR__foo_sigreturn
|
| 2312 |
* syscall
|
| 2313 |
*/
|
| 2314 |
|
| 2315 |
err = __put_user(0x24020000 + syscall, tramp + 0); |
| 2316 |
err |= __put_user(0x0000000c , tramp + 1); |
| 2317 |
/* flush_cache_sigtramp((unsigned long) tramp); */
|
| 2318 |
return err;
|
| 2319 |
} |
| 2320 |
|
| 2321 |
static inline int |
| 2322 |
setup_sigcontext(CPUState *regs, struct target_sigcontext *sc)
|
| 2323 |
{
|
| 2324 |
int err = 0; |
| 2325 |
|
| 2326 |
err |= __put_user(regs->active_tc.PC, &sc->sc_pc); |
| 2327 |
|
| 2328 |
#define save_gp_reg(i) do { \ |
| 2329 |
err |= __put_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \ |
| 2330 |
} while(0) |
| 2331 |
__put_user(0, &sc->sc_regs[0]); save_gp_reg(1); save_gp_reg(2); |
| 2332 |
save_gp_reg(3); save_gp_reg(4); save_gp_reg(5); save_gp_reg(6); |
| 2333 |
save_gp_reg(7); save_gp_reg(8); save_gp_reg(9); save_gp_reg(10); |
| 2334 |
save_gp_reg(11); save_gp_reg(12); save_gp_reg(13); save_gp_reg(14); |
| 2335 |
save_gp_reg(15); save_gp_reg(16); save_gp_reg(17); save_gp_reg(18); |
| 2336 |
save_gp_reg(19); save_gp_reg(20); save_gp_reg(21); save_gp_reg(22); |
| 2337 |
save_gp_reg(23); save_gp_reg(24); save_gp_reg(25); save_gp_reg(26); |
| 2338 |
save_gp_reg(27); save_gp_reg(28); save_gp_reg(29); save_gp_reg(30); |
| 2339 |
save_gp_reg(31);
|
| 2340 |
#undef save_gp_reg
|
| 2341 |
|
| 2342 |
err |= __put_user(regs->active_tc.HI[0], &sc->sc_mdhi);
|
| 2343 |
err |= __put_user(regs->active_tc.LO[0], &sc->sc_mdlo);
|
| 2344 |
|
| 2345 |
/* Not used yet, but might be useful if we ever have DSP suppport */
|
| 2346 |
#if 0
|
| 2347 |
if (cpu_has_dsp) {
|
| 2348 |
err |= __put_user(mfhi1(), &sc->sc_hi1);
|
| 2349 |
err |= __put_user(mflo1(), &sc->sc_lo1);
|
| 2350 |
err |= __put_user(mfhi2(), &sc->sc_hi2);
|
| 2351 |
err |= __put_user(mflo2(), &sc->sc_lo2);
|
| 2352 |
err |= __put_user(mfhi3(), &sc->sc_hi3);
|
| 2353 |
err |= __put_user(mflo3(), &sc->sc_lo3);
|
| 2354 |
err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
|
| 2355 |
}
|
| 2356 |
/* same with 64 bit */
|
| 2357 |
#ifdef CONFIG_64BIT
|
| 2358 |
err |= __put_user(regs->hi, &sc->sc_hi[0]);
|
| 2359 |
err |= __put_user(regs->lo, &sc->sc_lo[0]);
|
| 2360 |
if (cpu_has_dsp) {
|
| 2361 |
err |= __put_user(mfhi1(), &sc->sc_hi[1]);
|
| 2362 |
err |= __put_user(mflo1(), &sc->sc_lo[1]);
|
| 2363 |
err |= __put_user(mfhi2(), &sc->sc_hi[2]);
|
| 2364 |
err |= __put_user(mflo2(), &sc->sc_lo[2]);
|
| 2365 |
err |= __put_user(mfhi3(), &sc->sc_hi[3]);
|
| 2366 |
err |= __put_user(mflo3(), &sc->sc_lo[3]);
|
| 2367 |
err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
|
| 2368 |
}
|
| 2369 |
#endif
|
| 2370 |
#endif
|
| 2371 |
|
| 2372 |
#if 0
|
| 2373 |
err |= __put_user(!!used_math(), &sc->sc_used_math);
|
| 2374 |
|
| 2375 |
if (!used_math())
|
| 2376 |
goto out;
|
| 2377 |
|
| 2378 |
/*
|
| 2379 |
* Save FPU state to signal context. Signal handler will "inherit"
|
| 2380 |
* current FPU state.
|
| 2381 |
*/
|
| 2382 |
preempt_disable();
|
| 2383 |
|
| 2384 |
if (!is_fpu_owner()) {
|
| 2385 |
own_fpu();
|
| 2386 |
restore_fp(current);
|
| 2387 |
}
|
| 2388 |
err |= save_fp_context(sc);
|
| 2389 |
|
| 2390 |
preempt_enable();
|
| 2391 |
out:
|
| 2392 |
#endif
|
| 2393 |
return err;
|
| 2394 |
} |
| 2395 |
|
| 2396 |
static inline int |
| 2397 |
restore_sigcontext(CPUState *regs, struct target_sigcontext *sc)
|
| 2398 |
{
|
| 2399 |
int err = 0; |
| 2400 |
|
| 2401 |
err |= __get_user(regs->CP0_EPC, &sc->sc_pc); |
| 2402 |
|
| 2403 |
err |= __get_user(regs->active_tc.HI[0], &sc->sc_mdhi);
|
| 2404 |
err |= __get_user(regs->active_tc.LO[0], &sc->sc_mdlo);
|
| 2405 |
|
| 2406 |
#define restore_gp_reg(i) do { \ |
| 2407 |
err |= __get_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \ |
| 2408 |
} while(0) |
| 2409 |
restore_gp_reg( 1); restore_gp_reg( 2); restore_gp_reg( 3); |
| 2410 |
restore_gp_reg( 4); restore_gp_reg( 5); restore_gp_reg( 6); |
| 2411 |
restore_gp_reg( 7); restore_gp_reg( 8); restore_gp_reg( 9); |
| 2412 |
restore_gp_reg(10); restore_gp_reg(11); restore_gp_reg(12); |
| 2413 |
restore_gp_reg(13); restore_gp_reg(14); restore_gp_reg(15); |
| 2414 |
restore_gp_reg(16); restore_gp_reg(17); restore_gp_reg(18); |
| 2415 |
restore_gp_reg(19); restore_gp_reg(20); restore_gp_reg(21); |
| 2416 |
restore_gp_reg(22); restore_gp_reg(23); restore_gp_reg(24); |
| 2417 |
restore_gp_reg(25); restore_gp_reg(26); restore_gp_reg(27); |
| 2418 |
restore_gp_reg(28); restore_gp_reg(29); restore_gp_reg(30); |
| 2419 |
restore_gp_reg(31);
|
| 2420 |
#undef restore_gp_reg
|
| 2421 |
|
| 2422 |
#if 0
|
| 2423 |
if (cpu_has_dsp) {
|
| 2424 |
err |= __get_user(treg, &sc->sc_hi1); mthi1(treg);
|
| 2425 |
err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg);
|
| 2426 |
err |= __get_user(treg, &sc->sc_hi2); mthi2(treg);
|
| 2427 |
err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg);
|
| 2428 |
err |= __get_user(treg, &sc->sc_hi3); mthi3(treg);
|
| 2429 |
err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg);
|
| 2430 |
err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
|
| 2431 |
}
|
| 2432 |
#ifdef CONFIG_64BIT
|
| 2433 |
err |= __get_user(regs->hi, &sc->sc_hi[0]);
|
| 2434 |
err |= __get_user(regs->lo, &sc->sc_lo[0]);
|
| 2435 |
if (cpu_has_dsp) {
|
| 2436 |
err |= __get_user(treg, &sc->sc_hi[1]); mthi1(treg);
|
| 2437 |
err |= __get_user(treg, &sc->sc_lo[1]); mthi1(treg);
|
| 2438 |
err |= __get_user(treg, &sc->sc_hi[2]); mthi2(treg);
|
| 2439 |
err |= __get_user(treg, &sc->sc_lo[2]); mthi2(treg);
|
| 2440 |
err |= __get_user(treg, &sc->sc_hi[3]); mthi3(treg);
|
| 2441 |
err |= __get_user(treg, &sc->sc_lo[3]); mthi3(treg);
|
| 2442 |
err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
|
| 2443 |
}
|
| 2444 |
#endif
|
| 2445 |
|
| 2446 |
err |= __get_user(used_math, &sc->sc_used_math); |
| 2447 |
conditional_used_math(used_math); |
| 2448 |
|
| 2449 |
preempt_disable(); |
| 2450 |
|
| 2451 |
if (used_math()) {
|
| 2452 |
/* restore fpu context if we have used it before */
|
| 2453 |
own_fpu(); |
| 2454 |
err |= restore_fp_context(sc); |
| 2455 |
} else {
|
| 2456 |
/* signal handler may have used FPU. Give it up. */
|
| 2457 |
lose_fpu(); |
| 2458 |
} |
| 2459 |
|
| 2460 |
preempt_enable(); |
| 2461 |
#endif
|
| 2462 |
return err;
|
| 2463 |
} |
| 2464 |
/*
|
| 2465 |
* Determine which stack to use..
|
| 2466 |
*/
|
| 2467 |
static inline abi_ulong |
| 2468 |
get_sigframe(struct target_sigaction *ka, CPUState *regs, size_t frame_size)
|
| 2469 |
{
|
| 2470 |
unsigned long sp; |
| 2471 |
|
| 2472 |
/* Default to using normal stack */
|
| 2473 |
sp = regs->active_tc.gpr[29];
|
| 2474 |
|
| 2475 |
/*
|
| 2476 |
* FPU emulator may have it's own trampoline active just
|
| 2477 |
* above the user stack, 16-bytes before the next lowest
|
| 2478 |
* 16 byte boundary. Try to avoid trashing it.
|
| 2479 |
*/
|
| 2480 |
sp -= 32;
|
| 2481 |
|
| 2482 |
/* This is the X/Open sanctioned signal stack switching. */
|
| 2483 |
if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) { |
| 2484 |
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
| 2485 |
} |
| 2486 |
|
| 2487 |
return (sp - frame_size) & ~7; |
| 2488 |
} |
| 2489 |
|
| 2490 |
/* compare linux/arch/mips/kernel/signal.c:setup_frame() */
|
| 2491 |
static void setup_frame(int sig, struct target_sigaction * ka, |
| 2492 |
target_sigset_t *set, CPUState *regs) |
| 2493 |
{
|
| 2494 |
struct sigframe *frame;
|
| 2495 |
abi_ulong frame_addr; |
| 2496 |
int i;
|
| 2497 |
|
| 2498 |
frame_addr = get_sigframe(ka, regs, sizeof(*frame));
|
| 2499 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
| 2500 |
goto give_sigsegv;
|
| 2501 |
|
| 2502 |
install_sigtramp(frame->sf_code, TARGET_NR_sigreturn); |
| 2503 |
|
| 2504 |
if(setup_sigcontext(regs, &frame->sf_sc))
|
| 2505 |
goto give_sigsegv;
|
| 2506 |
|
| 2507 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
| 2508 |
if(__put_user(set->sig[i], &frame->sf_mask.sig[i]))
|
| 2509 |
goto give_sigsegv;
|
| 2510 |
} |
| 2511 |
|
| 2512 |
/*
|
| 2513 |
* Arguments to signal handler:
|
| 2514 |
*
|
| 2515 |
* a0 = signal number
|
| 2516 |
* a1 = 0 (should be cause)
|
| 2517 |
* a2 = pointer to struct sigcontext
|
| 2518 |
*
|
| 2519 |
* $25 and PC point to the signal handler, $29 points to the
|
| 2520 |
* struct sigframe.
|
| 2521 |
*/
|
| 2522 |
regs->active_tc.gpr[ 4] = sig;
|
| 2523 |
regs->active_tc.gpr[ 5] = 0; |
| 2524 |
regs->active_tc.gpr[ 6] = frame_addr + offsetof(struct sigframe, sf_sc); |
| 2525 |
regs->active_tc.gpr[29] = frame_addr;
|
| 2526 |
regs->active_tc.gpr[31] = frame_addr + offsetof(struct sigframe, sf_code); |
| 2527 |
/* The original kernel code sets CP0_EPC to the handler
|
| 2528 |
* since it returns to userland using eret
|
| 2529 |
* we cannot do this here, and we must set PC directly */
|
| 2530 |
regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler;
|
| 2531 |
unlock_user_struct(frame, frame_addr, 1);
|
| 2532 |
return;
|
| 2533 |
|
| 2534 |
give_sigsegv:
|
| 2535 |
unlock_user_struct(frame, frame_addr, 1);
|
| 2536 |
force_sig(TARGET_SIGSEGV/*, current*/);
|
| 2537 |
return;
|
| 2538 |
} |
| 2539 |
|
| 2540 |
long do_sigreturn(CPUState *regs)
|
| 2541 |
{
|
| 2542 |
struct sigframe *frame;
|
| 2543 |
abi_ulong frame_addr; |
| 2544 |
sigset_t blocked; |
| 2545 |
target_sigset_t target_set; |
| 2546 |
int i;
|
| 2547 |
|
| 2548 |
#if defined(DEBUG_SIGNAL)
|
| 2549 |
fprintf(stderr, "do_sigreturn\n");
|
| 2550 |
#endif
|
| 2551 |
frame_addr = regs->active_tc.gpr[29];
|
| 2552 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
| 2553 |
goto badframe;
|
| 2554 |
|
| 2555 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
| 2556 |
if(__get_user(target_set.sig[i], &frame->sf_mask.sig[i]))
|
| 2557 |
goto badframe;
|
| 2558 |
} |
| 2559 |
|
| 2560 |
target_to_host_sigset_internal(&blocked, &target_set); |
| 2561 |
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
| 2562 |
|
| 2563 |
if (restore_sigcontext(regs, &frame->sf_sc))
|
| 2564 |
goto badframe;
|
| 2565 |
|
| 2566 |
#if 0
|
| 2567 |
/*
|
| 2568 |
* Don't let your children do this ...
|
| 2569 |
*/
|
| 2570 |
__asm__ __volatile__(
|
| 2571 |
"move\t$29, %0\n\t"
|
| 2572 |
"j\tsyscall_exit"
|
| 2573 |
:/* no outputs */
|
| 2574 |
:"r" (®s));
|
| 2575 |
/* Unreached */
|
| 2576 |
#endif
|
| 2577 |
|
| 2578 |
regs->active_tc.PC = regs->CP0_EPC; |
| 2579 |
/* I am not sure this is right, but it seems to work
|
| 2580 |
* maybe a problem with nested signals ? */
|
| 2581 |
regs->CP0_EPC = 0;
|
| 2582 |
return 0; |
| 2583 |
|
| 2584 |
badframe:
|
| 2585 |
force_sig(TARGET_SIGSEGV/*, current*/);
|
| 2586 |
return 0; |
| 2587 |
} |
| 2588 |
|
| 2589 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
| 2590 |
target_siginfo_t *info, |
| 2591 |
target_sigset_t *set, CPUState *env) |
| 2592 |
{
|
| 2593 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
| 2594 |
} |
| 2595 |
|
| 2596 |
long do_rt_sigreturn(CPUState *env)
|
| 2597 |
{
|
| 2598 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
| 2599 |
return -TARGET_ENOSYS;
|
| 2600 |
} |
| 2601 |
|
| 2602 |
#elif defined(TARGET_SH4)
|
| 2603 |
|
| 2604 |
/*
|
| 2605 |
* code and data structures from linux kernel:
|
| 2606 |
* include/asm-sh/sigcontext.h
|
| 2607 |
* arch/sh/kernel/signal.c
|
| 2608 |
*/
|
| 2609 |
|
| 2610 |
struct target_sigcontext {
|
| 2611 |
target_ulong oldmask; |
| 2612 |
|
| 2613 |
/* CPU registers */
|
| 2614 |
target_ulong sc_gregs[16];
|
| 2615 |
target_ulong sc_pc; |
| 2616 |
target_ulong sc_pr; |
| 2617 |
target_ulong sc_sr; |
| 2618 |
target_ulong sc_gbr; |
| 2619 |
target_ulong sc_mach; |
| 2620 |
target_ulong sc_macl; |
| 2621 |
|
| 2622 |
/* FPU registers */
|
| 2623 |
target_ulong sc_fpregs[16];
|
| 2624 |
target_ulong sc_xfpregs[16];
|
| 2625 |
unsigned int sc_fpscr; |
| 2626 |
unsigned int sc_fpul; |
| 2627 |
unsigned int sc_ownedfp; |
| 2628 |
}; |
| 2629 |
|
| 2630 |
struct target_sigframe
|
| 2631 |
{
|
| 2632 |
struct target_sigcontext sc;
|
| 2633 |
target_ulong extramask[TARGET_NSIG_WORDS-1];
|
| 2634 |
uint16_t retcode[3];
|
| 2635 |
}; |
| 2636 |
|
| 2637 |
|
| 2638 |
struct target_ucontext {
|
| 2639 |
target_ulong uc_flags; |
| 2640 |
struct target_ucontext *uc_link;
|
| 2641 |
target_stack_t uc_stack; |
| 2642 |
struct target_sigcontext uc_mcontext;
|
| 2643 |
target_sigset_t uc_sigmask; /* mask last for extensibility */
|
| 2644 |
}; |
| 2645 |
|
| 2646 |
struct target_rt_sigframe
|
| 2647 |
{
|
| 2648 |
struct target_siginfo info;
|
| 2649 |
struct target_ucontext uc;
|
| 2650 |
uint16_t retcode[3];
|
| 2651 |
}; |
| 2652 |
|
| 2653 |
|
| 2654 |
#define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */ |
| 2655 |
#define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */ |
| 2656 |
|
| 2657 |
static abi_ulong get_sigframe(struct target_sigaction *ka, |
| 2658 |
unsigned long sp, size_t frame_size) |
| 2659 |
{
|
| 2660 |
if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) { |
| 2661 |
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
| 2662 |
} |
| 2663 |
|
| 2664 |
return (sp - frame_size) & -8ul; |
| 2665 |
} |
| 2666 |
|
| 2667 |
static int setup_sigcontext(struct target_sigcontext *sc, |
| 2668 |
CPUState *regs, unsigned long mask) |
| 2669 |
{
|
| 2670 |
int err = 0; |
| 2671 |
|
| 2672 |
#define COPY(x) err |= __put_user(regs->x, &sc->sc_##x) |
| 2673 |
COPY(gregs[0]); COPY(gregs[1]); |
| 2674 |
COPY(gregs[2]); COPY(gregs[3]); |
| 2675 |
COPY(gregs[4]); COPY(gregs[5]); |
| 2676 |
COPY(gregs[6]); COPY(gregs[7]); |
| 2677 |
COPY(gregs[8]); COPY(gregs[9]); |
| 2678 |
COPY(gregs[10]); COPY(gregs[11]); |
| 2679 |
COPY(gregs[12]); COPY(gregs[13]); |
| 2680 |
COPY(gregs[14]); COPY(gregs[15]); |
| 2681 |
COPY(gbr); COPY(mach); |
| 2682 |
COPY(macl); COPY(pr); |
| 2683 |
COPY(sr); COPY(pc); |
| 2684 |
#undef COPY
|
| 2685 |
|
| 2686 |
/* todo: save FPU registers here */
|
| 2687 |
|
| 2688 |
/* non-iBCS2 extensions.. */
|
| 2689 |
err |= __put_user(mask, &sc->oldmask); |
| 2690 |
|
| 2691 |
return err;
|
| 2692 |
} |
| 2693 |
|
| 2694 |
static int restore_sigcontext(CPUState *regs, |
| 2695 |
struct target_sigcontext *sc)
|
| 2696 |
{
|
| 2697 |
unsigned int err = 0; |
| 2698 |
|
| 2699 |
#define COPY(x) err |= __get_user(regs->x, &sc->sc_##x) |
| 2700 |
COPY(gregs[1]);
|
| 2701 |
COPY(gregs[2]); COPY(gregs[3]); |
| 2702 |
COPY(gregs[4]); COPY(gregs[5]); |
| 2703 |
COPY(gregs[6]); COPY(gregs[7]); |
| 2704 |
COPY(gregs[8]); COPY(gregs[9]); |
| 2705 |
COPY(gregs[10]); COPY(gregs[11]); |
| 2706 |
COPY(gregs[12]); COPY(gregs[13]); |
| 2707 |
COPY(gregs[14]); COPY(gregs[15]); |
| 2708 |
COPY(gbr); COPY(mach); |
| 2709 |
COPY(macl); COPY(pr); |
| 2710 |
COPY(sr); COPY(pc); |
| 2711 |
#undef COPY
|
| 2712 |
|
| 2713 |
/* todo: restore FPU registers here */
|
| 2714 |
|
| 2715 |
regs->tra = -1; /* disable syscall checks */ |
| 2716 |
return err;
|
| 2717 |
} |
| 2718 |
|
| 2719 |
static void setup_frame(int sig, struct target_sigaction *ka, |
| 2720 |
target_sigset_t *set, CPUState *regs) |
| 2721 |
{
|
| 2722 |
struct target_sigframe *frame;
|
| 2723 |
abi_ulong frame_addr; |
| 2724 |
int i;
|
| 2725 |
int err = 0; |
| 2726 |
int signal;
|
| 2727 |
|
| 2728 |
frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame)); |
| 2729 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
| 2730 |
goto give_sigsegv;
|
| 2731 |
|
| 2732 |
signal = current_exec_domain_sig(sig); |
| 2733 |
|
| 2734 |
err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);
|
| 2735 |
|
| 2736 |
for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) { |
| 2737 |
err |= __put_user(set->sig[i + 1], &frame->extramask[i]);
|
| 2738 |
} |
| 2739 |
|
| 2740 |
/* Set up to return from userspace. If provided, use a stub
|
| 2741 |
already in userspace. */
|
| 2742 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
| 2743 |
regs->pr = (unsigned long) ka->sa_restorer; |
| 2744 |
} else {
|
| 2745 |
/* Generate return code (system call to sigreturn) */
|
| 2746 |
err |= __put_user(MOVW(2), &frame->retcode[0]); |
| 2747 |
err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
|
| 2748 |
err |= __put_user((TARGET_NR_sigreturn), &frame->retcode[2]);
|
| 2749 |
regs->pr = (unsigned long) frame->retcode; |
| 2750 |
} |
| 2751 |
|
| 2752 |
if (err)
|
| 2753 |
goto give_sigsegv;
|
| 2754 |
|
| 2755 |
/* Set up registers for signal handler */
|
| 2756 |
regs->gregs[15] = (unsigned long) frame; |
| 2757 |
regs->gregs[4] = signal; /* Arg for signal handler */ |
| 2758 |
regs->gregs[5] = 0; |
| 2759 |
regs->gregs[6] = (unsigned long) &frame->sc; |
| 2760 |
regs->pc = (unsigned long) ka->_sa_handler; |
| 2761 |
|
| 2762 |
unlock_user_struct(frame, frame_addr, 1);
|
| 2763 |
return;
|
| 2764 |
|
| 2765 |
give_sigsegv:
|
| 2766 |
unlock_user_struct(frame, frame_addr, 1);
|
| 2767 |
force_sig(SIGSEGV); |
| 2768 |
} |
| 2769 |
|
| 2770 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
| 2771 |
target_siginfo_t *info, |
| 2772 |
target_sigset_t *set, CPUState *regs) |
| 2773 |
{
|
| 2774 |
struct target_rt_sigframe *frame;
|
| 2775 |
abi_ulong frame_addr; |
| 2776 |
int i;
|
| 2777 |
int err = 0; |
| 2778 |
int signal;
|
| 2779 |
|
| 2780 |
frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame)); |
| 2781 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
| 2782 |
goto give_sigsegv;
|
| 2783 |
|
| 2784 |
signal = current_exec_domain_sig(sig); |
| 2785 |
|
| 2786 |
err |= copy_siginfo_to_user(&frame->info, info); |
| 2787 |
|
| 2788 |
/* Create the ucontext. */
|
| 2789 |
err |= __put_user(0, &frame->uc.uc_flags);
|
| 2790 |
err |= __put_user(0, (unsigned long *)&frame->uc.uc_link); |
| 2791 |
err |= __put_user((unsigned long)target_sigaltstack_used.ss_sp, |
| 2792 |
&frame->uc.uc_stack.ss_sp); |
| 2793 |
err |= __put_user(sas_ss_flags(regs->gregs[15]),
|
| 2794 |
&frame->uc.uc_stack.ss_flags); |
| 2795 |
err |= __put_user(target_sigaltstack_used.ss_size, |
| 2796 |
&frame->uc.uc_stack.ss_size); |
| 2797 |
err |= setup_sigcontext(&frame->uc.uc_mcontext, |
| 2798 |
regs, set->sig[0]);
|
| 2799 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
| 2800 |
err |= __put_user(set->sig[i], &frame->uc.uc_sigmask.sig[i]); |
| 2801 |
} |
| 2802 |
|
| 2803 |
/* Set up to return from userspace. If provided, use a stub
|
| 2804 |
already in userspace. */
|
| 2805 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
| 2806 |
regs->pr = (unsigned long) ka->sa_restorer; |
| 2807 |
} else {
|
| 2808 |
/* Generate return code (system call to sigreturn) */
|
| 2809 |
err |= __put_user(MOVW(2), &frame->retcode[0]); |
| 2810 |
err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
|
| 2811 |
err |= __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]);
|
| 2812 |
regs->pr = (unsigned long) frame->retcode; |
| 2813 |
} |
| 2814 |
|
| 2815 |
if (err)
|
| 2816 |
goto give_sigsegv;
|
| 2817 |
|
| 2818 |
/* Set up registers for signal handler */
|
| 2819 |
regs->gregs[15] = (unsigned long) frame; |
| 2820 |
regs->gregs[4] = signal; /* Arg for signal handler */ |
| 2821 |
regs->gregs[5] = (unsigned long) &frame->info; |
| 2822 |
regs->gregs[6] = (unsigned long) &frame->uc; |
| 2823 |
regs->pc = (unsigned long) ka->_sa_handler; |
| 2824 |
|
| 2825 |
unlock_user_struct(frame, frame_addr, 1);
|
| 2826 |
return;
|
| 2827 |
|
| 2828 |
give_sigsegv:
|
| 2829 |
unlock_user_struct(frame, frame_addr, 1);
|
| 2830 |
force_sig(SIGSEGV); |
| 2831 |
} |
| 2832 |
|
| 2833 |
long do_sigreturn(CPUState *regs)
|
| 2834 |
{
|
| 2835 |
struct target_sigframe *frame;
|
| 2836 |
abi_ulong frame_addr; |
| 2837 |
sigset_t blocked; |
| 2838 |
target_sigset_t target_set; |
| 2839 |
int i;
|
| 2840 |
int err = 0; |
| 2841 |
|
| 2842 |
#if defined(DEBUG_SIGNAL)
|
| 2843 |
fprintf(stderr, "do_sigreturn\n");
|
| 2844 |
#endif
|
| 2845 |
frame_addr = regs->gregs[15];
|
| 2846 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
| 2847 |
goto badframe;
|
| 2848 |
|
| 2849 |
err |= __get_user(target_set.sig[0], &frame->sc.oldmask);
|
| 2850 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
| 2851 |
err |= (__get_user(target_set.sig[i], &frame->extramask[i - 1]));
|
| 2852 |
} |
| 2853 |
|
| 2854 |
if (err)
|
| 2855 |
goto badframe;
|
| 2856 |
|
| 2857 |
target_to_host_sigset_internal(&blocked, &target_set); |
| 2858 |
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
| 2859 |
|
| 2860 |
if (restore_sigcontext(regs, &frame->sc))
|
| 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 |
|
| 2872 |
long do_rt_sigreturn(CPUState *regs)
|
| 2873 |
{
|
| 2874 |
struct target_rt_sigframe *frame;
|
| 2875 |
abi_ulong frame_addr; |
| 2876 |
sigset_t blocked; |
| 2877 |
|
| 2878 |
#if defined(DEBUG_SIGNAL)
|
| 2879 |
fprintf(stderr, "do_rt_sigreturn\n");
|
| 2880 |
#endif
|
| 2881 |
frame_addr = regs->gregs[15];
|
| 2882 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
| 2883 |
goto badframe;
|
| 2884 |
|
| 2885 |
target_to_host_sigset(&blocked, &frame->uc.uc_sigmask); |
| 2886 |
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
| 2887 |
|
| 2888 |
if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
|
| 2889 |
goto badframe;
|
| 2890 |
|
| 2891 |
if (do_sigaltstack(frame_addr +
|
| 2892 |
offsetof(struct target_rt_sigframe, uc.uc_stack),
|
| 2893 |
0, get_sp_from_cpustate(regs)) == -EFAULT)
|
| 2894 |
goto badframe;
|
| 2895 |
|
| 2896 |
unlock_user_struct(frame, frame_addr, 0);
|
| 2897 |
return regs->gregs[0]; |
| 2898 |
|
| 2899 |
badframe:
|
| 2900 |
unlock_user_struct(frame, frame_addr, 0);
|
| 2901 |
force_sig(TARGET_SIGSEGV); |
| 2902 |
return 0; |
| 2903 |
} |
| 2904 |
#elif defined(TARGET_CRIS)
|
| 2905 |
|
| 2906 |
struct target_sigcontext {
|
| 2907 |
struct target_pt_regs regs; /* needs to be first */ |
| 2908 |
uint32_t oldmask; |
| 2909 |
uint32_t usp; /* usp before stacking this gunk on it */
|
| 2910 |
}; |
| 2911 |
|
| 2912 |
/* Signal frames. */
|
| 2913 |
struct target_signal_frame {
|
| 2914 |
struct target_sigcontext sc;
|
| 2915 |
uint32_t extramask[TARGET_NSIG_WORDS - 1];
|
| 2916 |
uint8_t retcode[8]; /* Trampoline code. */ |
| 2917 |
}; |
| 2918 |
|
| 2919 |
struct rt_signal_frame {
|
| 2920 |
struct siginfo *pinfo;
|
| 2921 |
void *puc;
|
| 2922 |
struct siginfo info;
|
| 2923 |
struct ucontext uc;
|
| 2924 |
uint8_t retcode[8]; /* Trampoline code. */ |
| 2925 |
}; |
| 2926 |
|
| 2927 |
static void setup_sigcontext(struct target_sigcontext *sc, CPUState *env) |
| 2928 |
{
|
| 2929 |
__put_user(env->regs[0], &sc->regs.r0);
|
| 2930 |
__put_user(env->regs[1], &sc->regs.r1);
|
| 2931 |
__put_user(env->regs[2], &sc->regs.r2);
|
| 2932 |
__put_user(env->regs[3], &sc->regs.r3);
|
| 2933 |
__put_user(env->regs[4], &sc->regs.r4);
|
| 2934 |
__put_user(env->regs[5], &sc->regs.r5);
|
| 2935 |
__put_user(env->regs[6], &sc->regs.r6);
|
| 2936 |
__put_user(env->regs[7], &sc->regs.r7);
|
| 2937 |
__put_user(env->regs[8], &sc->regs.r8);
|
| 2938 |
__put_user(env->regs[9], &sc->regs.r9);
|
| 2939 |
__put_user(env->regs[10], &sc->regs.r10);
|
| 2940 |
__put_user(env->regs[11], &sc->regs.r11);
|
| 2941 |
__put_user(env->regs[12], &sc->regs.r12);
|
| 2942 |
__put_user(env->regs[13], &sc->regs.r13);
|
| 2943 |
__put_user(env->regs[14], &sc->usp);
|
| 2944 |
__put_user(env->regs[15], &sc->regs.acr);
|
| 2945 |
__put_user(env->pregs[PR_MOF], &sc->regs.mof); |
| 2946 |
__put_user(env->pregs[PR_SRP], &sc->regs.srp); |
| 2947 |
__put_user(env->pc, &sc->regs.erp); |
| 2948 |
} |
| 2949 |
|
| 2950 |
static void restore_sigcontext(struct target_sigcontext *sc, CPUState *env) |
| 2951 |
{
|
| 2952 |
__get_user(env->regs[0], &sc->regs.r0);
|
| 2953 |
__get_user(env->regs[1], &sc->regs.r1);
|
| 2954 |
__get_user(env->regs[2], &sc->regs.r2);
|
| 2955 |
__get_user(env->regs[3], &sc->regs.r3);
|
| 2956 |
__get_user(env->regs[4], &sc->regs.r4);
|
| 2957 |
__get_user(env->regs[5], &sc->regs.r5);
|
| 2958 |
__get_user(env->regs[6], &sc->regs.r6);
|
| 2959 |
__get_user(env->regs[7], &sc->regs.r7);
|
| 2960 |
__get_user(env->regs[8], &sc->regs.r8);
|
| 2961 |
__get_user(env->regs[9], &sc->regs.r9);
|
| 2962 |
__get_user(env->regs[10], &sc->regs.r10);
|
| 2963 |
__get_user(env->regs[11], &sc->regs.r11);
|
| 2964 |
__get_user(env->regs[12], &sc->regs.r12);
|
| 2965 |
__get_user(env->regs[13], &sc->regs.r13);
|
| 2966 |
__get_user(env->regs[14], &sc->usp);
|
| 2967 |
__get_user(env->regs[15], &sc->regs.acr);
|
| 2968 |
__get_user(env->pregs[PR_MOF], &sc->regs.mof); |
| 2969 |
__get_user(env->pregs[PR_SRP], &sc->regs.srp); |
| 2970 |
__get_user(env->pc, &sc->regs.erp); |
| 2971 |
} |
| 2972 |
|
| 2973 |
static abi_ulong get_sigframe(CPUState *env, int framesize) |
| 2974 |
{
|
| 2975 |
abi_ulong sp; |
| 2976 |
/* Align the stack downwards to 4. */
|
| 2977 |
sp = (env->regs[R_SP] & ~3);
|
| 2978 |
return sp - framesize;
|
| 2979 |
} |
| 2980 |
|
| 2981 |
static void setup_frame(int sig, struct target_sigaction *ka, |
| 2982 |
target_sigset_t *set, CPUState *env) |
| 2983 |
{
|
| 2984 |
struct target_signal_frame *frame;
|
| 2985 |
abi_ulong frame_addr; |
| 2986 |
int err = 0; |
| 2987 |
int i;
|
| 2988 |
|
| 2989 |
frame_addr = get_sigframe(env, sizeof *frame);
|
| 2990 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
| 2991 |
goto badframe;
|
| 2992 |
|
| 2993 |
/*
|
| 2994 |
* The CRIS signal return trampoline. A real linux/CRIS kernel doesn't
|
| 2995 |
* use this trampoline anymore but it sets it up for GDB.
|
| 2996 |
* In QEMU, using the trampoline simplifies things a bit so we use it.
|
| 2997 |
*
|
| 2998 |
* This is movu.w __NR_sigreturn, r9; break 13;
|
| 2999 |
*/
|
| 3000 |
err |= __put_user(0x9c5f, frame->retcode+0); |
| 3001 |
err |= __put_user(TARGET_NR_sigreturn, |
| 3002 |
frame->retcode+2);
|
| 3003 |
err |= __put_user(0xe93d, frame->retcode+4); |
| 3004 |
|
| 3005 |
/* Save the mask. */
|
| 3006 |
err |= __put_user(set->sig[0], &frame->sc.oldmask);
|
| 3007 |
if (err)
|
| 3008 |
goto badframe;
|
| 3009 |
|
| 3010 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
| 3011 |
if (__put_user(set->sig[i], &frame->extramask[i - 1])) |
| 3012 |
goto badframe;
|
| 3013 |
} |
| 3014 |
|
| 3015 |
setup_sigcontext(&frame->sc, env); |
| 3016 |
|
| 3017 |
/* Move the stack and setup the arguments for the handler. */
|
| 3018 |
env->regs[R_SP] = (uint32_t) (unsigned long) frame; |
| 3019 |
env->regs[10] = sig;
|
| 3020 |
env->pc = (unsigned long) ka->_sa_handler; |
| 3021 |
/* Link SRP so the guest returns through the trampoline. */
|
| 3022 |
env->pregs[PR_SRP] = (uint32_t) (unsigned long) &frame->retcode[0]; |
| 3023 |
|
| 3024 |
unlock_user_struct(frame, frame_addr, 1);
|
| 3025 |
return;
|
| 3026 |
badframe:
|
| 3027 |
unlock_user_struct(frame, frame_addr, 1);
|
| 3028 |
force_sig(TARGET_SIGSEGV); |
| 3029 |
} |
| 3030 |
|
| 3031 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
| 3032 |
target_siginfo_t *info, |
| 3033 |
target_sigset_t *set, CPUState *env) |
| 3034 |
{
|
| 3035 |
fprintf(stderr, "CRIS setup_rt_frame: not implemented\n");
|
| 3036 |
} |
| 3037 |
|
| 3038 |
long do_sigreturn(CPUState *env)
|
| 3039 |
{
|
| 3040 |
struct target_signal_frame *frame;
|
| 3041 |
abi_ulong frame_addr; |
| 3042 |
target_sigset_t target_set; |
| 3043 |
sigset_t set; |
| 3044 |
int i;
|
| 3045 |
|
| 3046 |
frame_addr = env->regs[R_SP]; |
| 3047 |
/* Make sure the guest isn't playing games. */
|
| 3048 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) |
| 3049 |
goto badframe;
|
| 3050 |
|
| 3051 |
/* Restore blocked signals */
|
| 3052 |
if (__get_user(target_set.sig[0], &frame->sc.oldmask)) |
| 3053 |
goto badframe;
|
| 3054 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
| 3055 |
if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) |
| 3056 |
goto badframe;
|
| 3057 |
} |
| 3058 |
target_to_host_sigset_internal(&set, &target_set); |
| 3059 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
| 3060 |
|
| 3061 |
restore_sigcontext(&frame->sc, env); |
| 3062 |
unlock_user_struct(frame, frame_addr, 0);
|
| 3063 |
return env->regs[10]; |
| 3064 |
badframe:
|
| 3065 |
unlock_user_struct(frame, frame_addr, 0);
|
| 3066 |
force_sig(TARGET_SIGSEGV); |
| 3067 |
} |
| 3068 |
|
| 3069 |
long do_rt_sigreturn(CPUState *env)
|
| 3070 |
{
|
| 3071 |
fprintf(stderr, "CRIS do_rt_sigreturn: not implemented\n");
|
| 3072 |
return -TARGET_ENOSYS;
|
| 3073 |
} |
| 3074 |
|
| 3075 |
#else
|
| 3076 |
|
| 3077 |
static void setup_frame(int sig, struct target_sigaction *ka, |
| 3078 |
target_sigset_t *set, CPUState *env) |
| 3079 |
{
|
| 3080 |
fprintf(stderr, "setup_frame: not implemented\n");
|
| 3081 |
} |
| 3082 |
|
| 3083 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
| 3084 |
target_siginfo_t *info, |
| 3085 |
target_sigset_t *set, CPUState *env) |
| 3086 |
{
|
| 3087 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
| 3088 |
} |
| 3089 |
|
| 3090 |
long do_sigreturn(CPUState *env)
|
| 3091 |
{
|
| 3092 |
fprintf(stderr, "do_sigreturn: not implemented\n");
|
| 3093 |
return -TARGET_ENOSYS;
|
| 3094 |
} |
| 3095 |
|
| 3096 |
long do_rt_sigreturn(CPUState *env)
|
| 3097 |
{
|
| 3098 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
| 3099 |
return -TARGET_ENOSYS;
|
| 3100 |
} |
| 3101 |
|
| 3102 |
#endif
|
| 3103 |
|
| 3104 |
void process_pending_signals(CPUState *cpu_env)
|
| 3105 |
{
|
| 3106 |
int sig;
|
| 3107 |
abi_ulong handler; |
| 3108 |
sigset_t set, old_set; |
| 3109 |
target_sigset_t target_old_set; |
| 3110 |
struct emulated_sigtable *k;
|
| 3111 |
struct target_sigaction *sa;
|
| 3112 |
struct sigqueue *q;
|
| 3113 |
TaskState *ts = cpu_env->opaque; |
| 3114 |
|
| 3115 |
if (!ts->signal_pending)
|
| 3116 |
return;
|
| 3117 |
|
| 3118 |
/* FIXME: This is not threadsafe. */
|
| 3119 |
k = ts->sigtab; |
| 3120 |
for(sig = 1; sig <= TARGET_NSIG; sig++) { |
| 3121 |
if (k->pending)
|
| 3122 |
goto handle_signal;
|
| 3123 |
k++; |
| 3124 |
} |
| 3125 |
/* if no signal is pending, just return */
|
| 3126 |
ts->signal_pending = 0;
|
| 3127 |
return;
|
| 3128 |
|
| 3129 |
handle_signal:
|
| 3130 |
#ifdef DEBUG_SIGNAL
|
| 3131 |
fprintf(stderr, "qemu: process signal %d\n", sig);
|
| 3132 |
#endif
|
| 3133 |
/* dequeue signal */
|
| 3134 |
q = k->first; |
| 3135 |
k->first = q->next; |
| 3136 |
if (!k->first)
|
| 3137 |
k->pending = 0;
|
| 3138 |
|
| 3139 |
sig = gdb_handlesig (cpu_env, sig); |
| 3140 |
if (!sig) {
|
| 3141 |
sa = NULL;
|
| 3142 |
handler = TARGET_SIG_IGN; |
| 3143 |
} else {
|
| 3144 |
sa = &sigact_table[sig - 1];
|
| 3145 |
handler = sa->_sa_handler; |
| 3146 |
} |
| 3147 |
|
| 3148 |
if (handler == TARGET_SIG_DFL) {
|
| 3149 |
/* default handler : ignore some signal. The other are job control or fatal */
|
| 3150 |
if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
|
| 3151 |
kill(getpid(),SIGSTOP); |
| 3152 |
} else if (sig != TARGET_SIGCHLD && |
| 3153 |
sig != TARGET_SIGURG && |
| 3154 |
sig != TARGET_SIGWINCH && |
| 3155 |
sig != TARGET_SIGCONT) {
|
| 3156 |
force_sig(sig); |
| 3157 |
} |
| 3158 |
} else if (handler == TARGET_SIG_IGN) { |
| 3159 |
/* ignore sig */
|
| 3160 |
} else if (handler == TARGET_SIG_ERR) { |
| 3161 |
force_sig(sig); |
| 3162 |
} else {
|
| 3163 |
/* compute the blocked signals during the handler execution */
|
| 3164 |
target_to_host_sigset(&set, &sa->sa_mask); |
| 3165 |
/* SA_NODEFER indicates that the current signal should not be
|
| 3166 |
blocked during the handler */
|
| 3167 |
if (!(sa->sa_flags & TARGET_SA_NODEFER))
|
| 3168 |
sigaddset(&set, target_to_host_signal(sig)); |
| 3169 |
|
| 3170 |
/* block signals in the handler using Linux */
|
| 3171 |
sigprocmask(SIG_BLOCK, &set, &old_set); |
| 3172 |
/* save the previous blocked signal state to restore it at the
|
| 3173 |
end of the signal execution (see do_sigreturn) */
|
| 3174 |
host_to_target_sigset_internal(&target_old_set, &old_set); |
| 3175 |
|
| 3176 |
/* if the CPU is in VM86 mode, we restore the 32 bit values */
|
| 3177 |
#if defined(TARGET_I386) && !defined(TARGET_X86_64)
|
| 3178 |
{
|
| 3179 |
CPUX86State *env = cpu_env; |
| 3180 |
if (env->eflags & VM_MASK)
|
| 3181 |
save_v86_state(env); |
| 3182 |
} |
| 3183 |
#endif
|
| 3184 |
/* prepare the stack frame of the virtual CPU */
|
| 3185 |
if (sa->sa_flags & TARGET_SA_SIGINFO)
|
| 3186 |
setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env); |
| 3187 |
else
|
| 3188 |
setup_frame(sig, sa, &target_old_set, cpu_env); |
| 3189 |
if (sa->sa_flags & TARGET_SA_RESETHAND)
|
| 3190 |
sa->_sa_handler = TARGET_SIG_DFL; |
| 3191 |
} |
| 3192 |
if (q != &k->info)
|
| 3193 |
free_sigqueue(cpu_env, q); |
| 3194 |
} |