mirror of https://gitee.com/openkylin/qemu.git
3305 lines
96 KiB
C
3305 lines
96 KiB
C
/*
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* Emulation of Linux signals
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdarg.h>
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#include <unistd.h>
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#include <signal.h>
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#include <errno.h>
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#include <assert.h>
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#include <sys/ucontext.h>
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#include "qemu.h"
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#include "qemu-common.h"
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#include "target_signal.h"
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//#define DEBUG_SIGNAL
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static struct target_sigaltstack target_sigaltstack_used = {
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.ss_sp = 0,
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.ss_size = 0,
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.ss_flags = TARGET_SS_DISABLE,
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};
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static struct target_sigaction sigact_table[TARGET_NSIG];
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static void host_signal_handler(int host_signum, siginfo_t *info,
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void *puc);
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static uint8_t host_to_target_signal_table[65] = {
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[SIGHUP] = TARGET_SIGHUP,
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[SIGINT] = TARGET_SIGINT,
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[SIGQUIT] = TARGET_SIGQUIT,
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[SIGILL] = TARGET_SIGILL,
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[SIGTRAP] = TARGET_SIGTRAP,
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[SIGABRT] = TARGET_SIGABRT,
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/* [SIGIOT] = TARGET_SIGIOT,*/
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[SIGBUS] = TARGET_SIGBUS,
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[SIGFPE] = TARGET_SIGFPE,
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[SIGKILL] = TARGET_SIGKILL,
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[SIGUSR1] = TARGET_SIGUSR1,
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[SIGSEGV] = TARGET_SIGSEGV,
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[SIGUSR2] = TARGET_SIGUSR2,
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[SIGPIPE] = TARGET_SIGPIPE,
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[SIGALRM] = TARGET_SIGALRM,
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[SIGTERM] = TARGET_SIGTERM,
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#ifdef SIGSTKFLT
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[SIGSTKFLT] = TARGET_SIGSTKFLT,
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#endif
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[SIGCHLD] = TARGET_SIGCHLD,
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[SIGCONT] = TARGET_SIGCONT,
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[SIGSTOP] = TARGET_SIGSTOP,
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[SIGTSTP] = TARGET_SIGTSTP,
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[SIGTTIN] = TARGET_SIGTTIN,
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[SIGTTOU] = TARGET_SIGTTOU,
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[SIGURG] = TARGET_SIGURG,
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[SIGXCPU] = TARGET_SIGXCPU,
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[SIGXFSZ] = TARGET_SIGXFSZ,
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[SIGVTALRM] = TARGET_SIGVTALRM,
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[SIGPROF] = TARGET_SIGPROF,
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[SIGWINCH] = TARGET_SIGWINCH,
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[SIGIO] = TARGET_SIGIO,
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[SIGPWR] = TARGET_SIGPWR,
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[SIGSYS] = TARGET_SIGSYS,
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/* next signals stay the same */
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/* Nasty hack: Reverse SIGRTMIN and SIGRTMAX to avoid overlap with
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host libpthread signals. This assumes noone actually uses SIGRTMAX :-/
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To fix this properly we need to do manual signal delivery multiplexed
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over a single host signal. */
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[__SIGRTMIN] = __SIGRTMAX,
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[__SIGRTMAX] = __SIGRTMIN,
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};
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static uint8_t target_to_host_signal_table[65];
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static inline int on_sig_stack(unsigned long sp)
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{
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return (sp - target_sigaltstack_used.ss_sp
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< target_sigaltstack_used.ss_size);
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}
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static inline int sas_ss_flags(unsigned long sp)
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{
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return (target_sigaltstack_used.ss_size == 0 ? SS_DISABLE
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: on_sig_stack(sp) ? SS_ONSTACK : 0);
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}
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int host_to_target_signal(int sig)
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{
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if (sig > 64)
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return sig;
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return host_to_target_signal_table[sig];
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}
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int target_to_host_signal(int sig)
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{
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if (sig > 64)
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return sig;
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return target_to_host_signal_table[sig];
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}
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static inline void target_sigemptyset(target_sigset_t *set)
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{
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memset(set, 0, sizeof(*set));
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}
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static inline void target_sigaddset(target_sigset_t *set, int signum)
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{
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signum--;
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abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW);
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set->sig[signum / TARGET_NSIG_BPW] |= mask;
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}
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static inline int target_sigismember(const target_sigset_t *set, int signum)
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{
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signum--;
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abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW);
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return ((set->sig[signum / TARGET_NSIG_BPW] & mask) != 0);
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}
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static void host_to_target_sigset_internal(target_sigset_t *d,
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const sigset_t *s)
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{
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int i;
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target_sigemptyset(d);
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for (i = 1; i <= TARGET_NSIG; i++) {
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if (sigismember(s, i)) {
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target_sigaddset(d, host_to_target_signal(i));
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}
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}
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}
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void host_to_target_sigset(target_sigset_t *d, const sigset_t *s)
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{
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target_sigset_t d1;
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int i;
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host_to_target_sigset_internal(&d1, s);
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for(i = 0;i < TARGET_NSIG_WORDS; i++)
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d->sig[i] = tswapl(d1.sig[i]);
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}
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static void target_to_host_sigset_internal(sigset_t *d,
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const target_sigset_t *s)
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{
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int i;
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sigemptyset(d);
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for (i = 1; i <= TARGET_NSIG; i++) {
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if (target_sigismember(s, i)) {
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sigaddset(d, target_to_host_signal(i));
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}
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}
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}
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void target_to_host_sigset(sigset_t *d, const target_sigset_t *s)
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{
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target_sigset_t s1;
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int i;
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for(i = 0;i < TARGET_NSIG_WORDS; i++)
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s1.sig[i] = tswapl(s->sig[i]);
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target_to_host_sigset_internal(d, &s1);
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}
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void host_to_target_old_sigset(abi_ulong *old_sigset,
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const sigset_t *sigset)
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{
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target_sigset_t d;
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host_to_target_sigset(&d, sigset);
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*old_sigset = d.sig[0];
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}
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void target_to_host_old_sigset(sigset_t *sigset,
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const abi_ulong *old_sigset)
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{
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target_sigset_t d;
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int i;
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d.sig[0] = *old_sigset;
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for(i = 1;i < TARGET_NSIG_WORDS; i++)
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d.sig[i] = 0;
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target_to_host_sigset(sigset, &d);
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}
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/* siginfo conversion */
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static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo,
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const siginfo_t *info)
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{
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int sig;
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sig = host_to_target_signal(info->si_signo);
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tinfo->si_signo = sig;
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tinfo->si_errno = 0;
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tinfo->si_code = info->si_code;
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if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
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sig == SIGBUS || sig == SIGTRAP) {
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/* should never come here, but who knows. The information for
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the target is irrelevant */
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tinfo->_sifields._sigfault._addr = 0;
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} else if (sig == SIGIO) {
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tinfo->_sifields._sigpoll._fd = info->si_fd;
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} else if (sig >= TARGET_SIGRTMIN) {
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tinfo->_sifields._rt._pid = info->si_pid;
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tinfo->_sifields._rt._uid = info->si_uid;
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/* XXX: potential problem if 64 bit */
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tinfo->_sifields._rt._sigval.sival_ptr =
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(abi_ulong)(unsigned long)info->si_value.sival_ptr;
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}
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}
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static void tswap_siginfo(target_siginfo_t *tinfo,
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const target_siginfo_t *info)
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{
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int sig;
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sig = info->si_signo;
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tinfo->si_signo = tswap32(sig);
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tinfo->si_errno = tswap32(info->si_errno);
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tinfo->si_code = tswap32(info->si_code);
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if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
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sig == SIGBUS || sig == SIGTRAP) {
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tinfo->_sifields._sigfault._addr =
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tswapl(info->_sifields._sigfault._addr);
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} else if (sig == SIGIO) {
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tinfo->_sifields._sigpoll._fd = tswap32(info->_sifields._sigpoll._fd);
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} else if (sig >= TARGET_SIGRTMIN) {
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tinfo->_sifields._rt._pid = tswap32(info->_sifields._rt._pid);
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tinfo->_sifields._rt._uid = tswap32(info->_sifields._rt._uid);
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tinfo->_sifields._rt._sigval.sival_ptr =
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tswapl(info->_sifields._rt._sigval.sival_ptr);
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}
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}
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void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info)
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{
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host_to_target_siginfo_noswap(tinfo, info);
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tswap_siginfo(tinfo, tinfo);
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}
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/* XXX: we support only POSIX RT signals are used. */
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/* XXX: find a solution for 64 bit (additional malloced data is needed) */
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void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo)
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{
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info->si_signo = tswap32(tinfo->si_signo);
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info->si_errno = tswap32(tinfo->si_errno);
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info->si_code = tswap32(tinfo->si_code);
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info->si_pid = tswap32(tinfo->_sifields._rt._pid);
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info->si_uid = tswap32(tinfo->_sifields._rt._uid);
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info->si_value.sival_ptr =
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(void *)(long)tswapl(tinfo->_sifields._rt._sigval.sival_ptr);
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}
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static int fatal_signal (int sig)
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{
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switch (sig) {
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case TARGET_SIGCHLD:
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case TARGET_SIGURG:
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case TARGET_SIGWINCH:
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/* Ignored by default. */
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return 0;
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case TARGET_SIGCONT:
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case TARGET_SIGSTOP:
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case TARGET_SIGTSTP:
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case TARGET_SIGTTIN:
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case TARGET_SIGTTOU:
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/* Job control signals. */
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return 0;
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default:
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return 1;
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}
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}
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void signal_init(void)
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{
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struct sigaction act;
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struct sigaction oact;
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int i, j;
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int host_sig;
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/* generate signal conversion tables */
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for(i = 1; i <= 64; i++) {
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if (host_to_target_signal_table[i] == 0)
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host_to_target_signal_table[i] = i;
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}
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for(i = 1; i <= 64; i++) {
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j = host_to_target_signal_table[i];
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target_to_host_signal_table[j] = i;
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}
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/* set all host signal handlers. ALL signals are blocked during
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the handlers to serialize them. */
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memset(sigact_table, 0, sizeof(sigact_table));
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sigfillset(&act.sa_mask);
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act.sa_flags = SA_SIGINFO;
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act.sa_sigaction = host_signal_handler;
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for(i = 1; i <= TARGET_NSIG; i++) {
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host_sig = target_to_host_signal(i);
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sigaction(host_sig, NULL, &oact);
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if (oact.sa_sigaction == (void *)SIG_IGN) {
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sigact_table[i - 1]._sa_handler = TARGET_SIG_IGN;
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} else if (oact.sa_sigaction == (void *)SIG_DFL) {
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sigact_table[i - 1]._sa_handler = TARGET_SIG_DFL;
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}
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/* If there's already a handler installed then something has
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gone horribly wrong, so don't even try to handle that case. */
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/* Install some handlers for our own use. We need at least
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SIGSEGV and SIGBUS, to detect exceptions. We can not just
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trap all signals because it affects syscall interrupt
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behavior. But do trap all default-fatal signals. */
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if (fatal_signal (i))
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sigaction(host_sig, &act, NULL);
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}
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}
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/* signal queue handling */
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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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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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/* 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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struct sigaction act;
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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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gdb_signalled(thread_env, sig);
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/* The proper exit code for dieing from an uncaught signal is
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* -<signal>. The kernel doesn't allow exit() or _exit() to pass
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* a negative value. To get the proper exit code we need to
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* actually die from an uncaught signal. Here the default signal
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* handler is installed, we send ourself a signal and we wait for
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* it to arrive. */
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sigfillset(&act.sa_mask);
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act.sa_handler = SIG_DFL;
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sigaction(host_sig, &act, NULL);
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/* For some reason raise(host_sig) doesn't send the signal when
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* statically linked on x86-64. */
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kill(getpid(), host_sig);
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/* Make sure the signal isn't masked (just reuse the mask inside
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of act) */
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sigdelset(&act.sa_mask, host_sig);
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sigsuspend(&act.sa_mask);
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/* unreachable */
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assert(0);
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}
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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)
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{
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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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#if defined(DEBUG_SIGNAL)
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fprintf(stderr, "queue_signal: sig=%d\n",
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sig);
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#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;
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} 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 &&
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sig != TARGET_SIGWINCH &&
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sig != TARGET_SIGCONT) {
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force_sig(sig);
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} else {
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return 0; /* indicate ignored */
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}
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} else if (!queue && handler == TARGET_SIG_IGN) {
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/* ignore signal */
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return 0;
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} else if (!queue && handler == TARGET_SIG_ERR) {
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force_sig(sig);
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} else {
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pq = &k->first;
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if (sig < TARGET_SIGRTMIN) {
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/* if non real time signal, we queue exactly one signal */
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if (!k->pending)
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q = &k->info;
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else
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return 0;
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} else {
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if (!k->pending) {
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/* first signal */
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q = &k->info;
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} else {
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q = alloc_sigqueue(env);
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if (!q)
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return -EAGAIN;
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while (*pq != NULL)
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pq = &(*pq)->next;
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}
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}
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*pq = q;
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q->info = *info;
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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 */
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}
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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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int sig;
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target_siginfo_t tinfo;
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/* the CPU emulator uses some host signals to detect exceptions,
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we forward to it some signals */
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if ((host_signum == SIGSEGV || host_signum == SIGBUS)
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&& info->si_code > 0) {
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if (cpu_signal_handler(host_signum, info, puc))
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return;
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}
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/* get target signal number */
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sig = host_to_target_signal(host_signum);
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if (sig < 1 || sig > TARGET_NSIG)
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return;
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#if defined(DEBUG_SIGNAL)
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fprintf(stderr, "qemu: got signal %d\n", sig);
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#endif
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host_to_target_siginfo_noswap(&tinfo, info);
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if (queue_signal(thread_env, sig, &tinfo) == 1) {
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/* interrupt the virtual CPU as soon as possible */
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cpu_exit(thread_env);
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}
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}
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|
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/* do_sigaltstack() returns target values and errnos. */
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|
/* compare linux/kernel/signal.c:do_sigaltstack() */
|
|
abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp)
|
|
{
|
|
int ret;
|
|
struct target_sigaltstack oss;
|
|
|
|
/* XXX: test errors */
|
|
if(uoss_addr)
|
|
{
|
|
__put_user(target_sigaltstack_used.ss_sp, &oss.ss_sp);
|
|
__put_user(target_sigaltstack_used.ss_size, &oss.ss_size);
|
|
__put_user(sas_ss_flags(sp), &oss.ss_flags);
|
|
}
|
|
|
|
if(uss_addr)
|
|
{
|
|
struct target_sigaltstack *uss;
|
|
struct target_sigaltstack ss;
|
|
|
|
ret = -TARGET_EFAULT;
|
|
if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1)
|
|
|| __get_user(ss.ss_sp, &uss->ss_sp)
|
|
|| __get_user(ss.ss_size, &uss->ss_size)
|
|
|| __get_user(ss.ss_flags, &uss->ss_flags))
|
|
goto out;
|
|
unlock_user_struct(uss, uss_addr, 0);
|
|
|
|
ret = -TARGET_EPERM;
|
|
if (on_sig_stack(sp))
|
|
goto out;
|
|
|
|
ret = -TARGET_EINVAL;
|
|
if (ss.ss_flags != TARGET_SS_DISABLE
|
|
&& ss.ss_flags != TARGET_SS_ONSTACK
|
|
&& ss.ss_flags != 0)
|
|
goto out;
|
|
|
|
if (ss.ss_flags == TARGET_SS_DISABLE) {
|
|
ss.ss_size = 0;
|
|
ss.ss_sp = 0;
|
|
} else {
|
|
ret = -TARGET_ENOMEM;
|
|
if (ss.ss_size < MINSIGSTKSZ)
|
|
goto out;
|
|
}
|
|
|
|
target_sigaltstack_used.ss_sp = ss.ss_sp;
|
|
target_sigaltstack_used.ss_size = ss.ss_size;
|
|
}
|
|
|
|
if (uoss_addr) {
|
|
ret = -TARGET_EFAULT;
|
|
if (copy_to_user(uoss_addr, &oss, sizeof(oss)))
|
|
goto out;
|
|
}
|
|
|
|
ret = 0;
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/* do_sigaction() return host values and errnos */
|
|
int do_sigaction(int sig, const struct target_sigaction *act,
|
|
struct target_sigaction *oact)
|
|
{
|
|
struct target_sigaction *k;
|
|
struct sigaction act1;
|
|
int host_sig;
|
|
int ret = 0;
|
|
|
|
if (sig < 1 || sig > TARGET_NSIG || sig == TARGET_SIGKILL || sig == TARGET_SIGSTOP)
|
|
return -EINVAL;
|
|
k = &sigact_table[sig - 1];
|
|
#if defined(DEBUG_SIGNAL)
|
|
fprintf(stderr, "sigaction sig=%d act=0x%08x, oact=0x%08x\n",
|
|
sig, (int)act, (int)oact);
|
|
#endif
|
|
if (oact) {
|
|
oact->_sa_handler = tswapl(k->_sa_handler);
|
|
oact->sa_flags = tswapl(k->sa_flags);
|
|
#if !defined(TARGET_MIPS)
|
|
oact->sa_restorer = tswapl(k->sa_restorer);
|
|
#endif
|
|
oact->sa_mask = k->sa_mask;
|
|
}
|
|
if (act) {
|
|
/* FIXME: This is not threadsafe. */
|
|
k->_sa_handler = tswapl(act->_sa_handler);
|
|
k->sa_flags = tswapl(act->sa_flags);
|
|
#if !defined(TARGET_MIPS)
|
|
k->sa_restorer = tswapl(act->sa_restorer);
|
|
#endif
|
|
k->sa_mask = act->sa_mask;
|
|
|
|
/* we update the host linux signal state */
|
|
host_sig = target_to_host_signal(sig);
|
|
if (host_sig != SIGSEGV && host_sig != SIGBUS) {
|
|
sigfillset(&act1.sa_mask);
|
|
act1.sa_flags = SA_SIGINFO;
|
|
if (k->sa_flags & TARGET_SA_RESTART)
|
|
act1.sa_flags |= SA_RESTART;
|
|
/* NOTE: it is important to update the host kernel signal
|
|
ignore state to avoid getting unexpected interrupted
|
|
syscalls */
|
|
if (k->_sa_handler == TARGET_SIG_IGN) {
|
|
act1.sa_sigaction = (void *)SIG_IGN;
|
|
} else if (k->_sa_handler == TARGET_SIG_DFL) {
|
|
if (fatal_signal (sig))
|
|
act1.sa_sigaction = host_signal_handler;
|
|
else
|
|
act1.sa_sigaction = (void *)SIG_DFL;
|
|
} else {
|
|
act1.sa_sigaction = host_signal_handler;
|
|
}
|
|
ret = sigaction(host_sig, &act1, NULL);
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static inline int copy_siginfo_to_user(target_siginfo_t *tinfo,
|
|
const target_siginfo_t *info)
|
|
{
|
|
tswap_siginfo(tinfo, info);
|
|
return 0;
|
|
}
|
|
|
|
static inline int current_exec_domain_sig(int sig)
|
|
{
|
|
return /* current->exec_domain && current->exec_domain->signal_invmap
|
|
&& sig < 32 ? current->exec_domain->signal_invmap[sig] : */ sig;
|
|
}
|
|
|
|
#if defined(TARGET_I386) && TARGET_ABI_BITS == 32
|
|
|
|
/* from the Linux kernel */
|
|
|
|
struct target_fpreg {
|
|
uint16_t significand[4];
|
|
uint16_t exponent;
|
|
};
|
|
|
|
struct target_fpxreg {
|
|
uint16_t significand[4];
|
|
uint16_t exponent;
|
|
uint16_t padding[3];
|
|
};
|
|
|
|
struct target_xmmreg {
|
|
abi_ulong element[4];
|
|
};
|
|
|
|
struct target_fpstate {
|
|
/* Regular FPU environment */
|
|
abi_ulong cw;
|
|
abi_ulong sw;
|
|
abi_ulong tag;
|
|
abi_ulong ipoff;
|
|
abi_ulong cssel;
|
|
abi_ulong dataoff;
|
|
abi_ulong datasel;
|
|
struct target_fpreg _st[8];
|
|
uint16_t status;
|
|
uint16_t magic; /* 0xffff = regular FPU data only */
|
|
|
|
/* FXSR FPU environment */
|
|
abi_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */
|
|
abi_ulong mxcsr;
|
|
abi_ulong reserved;
|
|
struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */
|
|
struct target_xmmreg _xmm[8];
|
|
abi_ulong padding[56];
|
|
};
|
|
|
|
#define X86_FXSR_MAGIC 0x0000
|
|
|
|
struct target_sigcontext {
|
|
uint16_t gs, __gsh;
|
|
uint16_t fs, __fsh;
|
|
uint16_t es, __esh;
|
|
uint16_t ds, __dsh;
|
|
abi_ulong edi;
|
|
abi_ulong esi;
|
|
abi_ulong ebp;
|
|
abi_ulong esp;
|
|
abi_ulong ebx;
|
|
abi_ulong edx;
|
|
abi_ulong ecx;
|
|
abi_ulong eax;
|
|
abi_ulong trapno;
|
|
abi_ulong err;
|
|
abi_ulong eip;
|
|
uint16_t cs, __csh;
|
|
abi_ulong eflags;
|
|
abi_ulong esp_at_signal;
|
|
uint16_t ss, __ssh;
|
|
abi_ulong fpstate; /* pointer */
|
|
abi_ulong oldmask;
|
|
abi_ulong cr2;
|
|
};
|
|
|
|
struct target_ucontext {
|
|
abi_ulong tuc_flags;
|
|
abi_ulong tuc_link;
|
|
target_stack_t tuc_stack;
|
|
struct target_sigcontext tuc_mcontext;
|
|
target_sigset_t tuc_sigmask; /* mask last for extensibility */
|
|
};
|
|
|
|
struct sigframe
|
|
{
|
|
abi_ulong pretcode;
|
|
int sig;
|
|
struct target_sigcontext sc;
|
|
struct target_fpstate fpstate;
|
|
abi_ulong extramask[TARGET_NSIG_WORDS-1];
|
|
char retcode[8];
|
|
};
|
|
|
|
struct rt_sigframe
|
|
{
|
|
abi_ulong pretcode;
|
|
int sig;
|
|
abi_ulong pinfo;
|
|
abi_ulong puc;
|
|
struct target_siginfo info;
|
|
struct target_ucontext uc;
|
|
struct target_fpstate fpstate;
|
|
char retcode[8];
|
|
};
|
|
|
|
/*
|
|
* Set up a signal frame.
|
|
*/
|
|
|
|
/* XXX: save x87 state */
|
|
static int
|
|
setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate,
|
|
CPUX86State *env, abi_ulong mask, abi_ulong fpstate_addr)
|
|
{
|
|
int err = 0;
|
|
uint16_t magic;
|
|
|
|
/* already locked in setup_frame() */
|
|
err |= __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs);
|
|
err |= __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs);
|
|
err |= __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es);
|
|
err |= __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds);
|
|
err |= __put_user(env->regs[R_EDI], &sc->edi);
|
|
err |= __put_user(env->regs[R_ESI], &sc->esi);
|
|
err |= __put_user(env->regs[R_EBP], &sc->ebp);
|
|
err |= __put_user(env->regs[R_ESP], &sc->esp);
|
|
err |= __put_user(env->regs[R_EBX], &sc->ebx);
|
|
err |= __put_user(env->regs[R_EDX], &sc->edx);
|
|
err |= __put_user(env->regs[R_ECX], &sc->ecx);
|
|
err |= __put_user(env->regs[R_EAX], &sc->eax);
|
|
err |= __put_user(env->exception_index, &sc->trapno);
|
|
err |= __put_user(env->error_code, &sc->err);
|
|
err |= __put_user(env->eip, &sc->eip);
|
|
err |= __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs);
|
|
err |= __put_user(env->eflags, &sc->eflags);
|
|
err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal);
|
|
err |= __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss);
|
|
|
|
cpu_x86_fsave(env, fpstate_addr, 1);
|
|
fpstate->status = fpstate->sw;
|
|
magic = 0xffff;
|
|
err |= __put_user(magic, &fpstate->magic);
|
|
err |= __put_user(fpstate_addr, &sc->fpstate);
|
|
|
|
/* non-iBCS2 extensions.. */
|
|
err |= __put_user(mask, &sc->oldmask);
|
|
err |= __put_user(env->cr[2], &sc->cr2);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Determine which stack to use..
|
|
*/
|
|
|
|
static inline abi_ulong
|
|
get_sigframe(struct target_sigaction *ka, CPUX86State *env, size_t frame_size)
|
|
{
|
|
unsigned long esp;
|
|
|
|
/* Default to using normal stack */
|
|
esp = env->regs[R_ESP];
|
|
/* This is the X/Open sanctioned signal stack switching. */
|
|
if (ka->sa_flags & TARGET_SA_ONSTACK) {
|
|
if (sas_ss_flags(esp) == 0)
|
|
esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
|
|
}
|
|
|
|
/* This is the legacy signal stack switching. */
|
|
else
|
|
if ((env->segs[R_SS].selector & 0xffff) != __USER_DS &&
|
|
!(ka->sa_flags & TARGET_SA_RESTORER) &&
|
|
ka->sa_restorer) {
|
|
esp = (unsigned long) ka->sa_restorer;
|
|
}
|
|
return (esp - frame_size) & -8ul;
|
|
}
|
|
|
|
/* compare linux/arch/i386/kernel/signal.c:setup_frame() */
|
|
static void setup_frame(int sig, struct target_sigaction *ka,
|
|
target_sigset_t *set, CPUX86State *env)
|
|
{
|
|
abi_ulong frame_addr;
|
|
struct sigframe *frame;
|
|
int i, err = 0;
|
|
|
|
frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
|
|
|
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
|
|
goto give_sigsegv;
|
|
|
|
err |= __put_user(current_exec_domain_sig(sig),
|
|
&frame->sig);
|
|
if (err)
|
|
goto give_sigsegv;
|
|
|
|
setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0],
|
|
frame_addr + offsetof(struct sigframe, fpstate));
|
|
if (err)
|
|
goto give_sigsegv;
|
|
|
|
for(i = 1; i < TARGET_NSIG_WORDS; i++) {
|
|
if (__put_user(set->sig[i], &frame->extramask[i - 1]))
|
|
goto give_sigsegv;
|
|
}
|
|
|
|
/* Set up to return from userspace. If provided, use a stub
|
|
already in userspace. */
|
|
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
|
err |= __put_user(ka->sa_restorer, &frame->pretcode);
|
|
} else {
|
|
uint16_t val16;
|
|
abi_ulong retcode_addr;
|
|
retcode_addr = frame_addr + offsetof(struct sigframe, retcode);
|
|
err |= __put_user(retcode_addr, &frame->pretcode);
|
|
/* This is popl %eax ; movl $,%eax ; int $0x80 */
|
|
val16 = 0xb858;
|
|
err |= __put_user(val16, (uint16_t *)(frame->retcode+0));
|
|
err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2));
|
|
val16 = 0x80cd;
|
|
err |= __put_user(val16, (uint16_t *)(frame->retcode+6));
|
|
}
|
|
|
|
if (err)
|
|
goto give_sigsegv;
|
|
|
|
/* Set up registers for signal handler */
|
|
env->regs[R_ESP] = frame_addr;
|
|
env->eip = ka->_sa_handler;
|
|
|
|
cpu_x86_load_seg(env, R_DS, __USER_DS);
|
|
cpu_x86_load_seg(env, R_ES, __USER_DS);
|
|
cpu_x86_load_seg(env, R_SS, __USER_DS);
|
|
cpu_x86_load_seg(env, R_CS, __USER_CS);
|
|
env->eflags &= ~TF_MASK;
|
|
|
|
unlock_user_struct(frame, frame_addr, 1);
|
|
|
|
return;
|
|
|
|
give_sigsegv:
|
|
unlock_user_struct(frame, frame_addr, 1);
|
|
if (sig == TARGET_SIGSEGV)
|
|
ka->_sa_handler = TARGET_SIG_DFL;
|
|
force_sig(TARGET_SIGSEGV /* , current */);
|
|
}
|
|
|
|
/* compare linux/arch/i386/kernel/signal.c:setup_rt_frame() */
|
|
static void setup_rt_frame(int sig, struct target_sigaction *ka,
|
|
target_siginfo_t *info,
|
|
target_sigset_t *set, CPUX86State *env)
|
|
{
|
|
abi_ulong frame_addr, addr;
|
|
struct rt_sigframe *frame;
|
|
int i, err = 0;
|
|
|
|
frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
|
|
|
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
|
|
goto give_sigsegv;
|
|
|
|
err |= __put_user(current_exec_domain_sig(sig),
|
|
&frame->sig);
|
|
addr = frame_addr + offsetof(struct rt_sigframe, info);
|
|
err |= __put_user(addr, &frame->pinfo);
|
|
addr = frame_addr + offsetof(struct rt_sigframe, uc);
|
|
err |= __put_user(addr, &frame->puc);
|
|
err |= copy_siginfo_to_user(&frame->info, info);
|
|
if (err)
|
|
goto give_sigsegv;
|
|
|
|
/* Create the ucontext. */
|
|
err |= __put_user(0, &frame->uc.tuc_flags);
|
|
err |= __put_user(0, &frame->uc.tuc_link);
|
|
err |= __put_user(target_sigaltstack_used.ss_sp,
|
|
&frame->uc.tuc_stack.ss_sp);
|
|
err |= __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
|
|
&frame->uc.tuc_stack.ss_flags);
|
|
err |= __put_user(target_sigaltstack_used.ss_size,
|
|
&frame->uc.tuc_stack.ss_size);
|
|
err |= setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate,
|
|
env, set->sig[0],
|
|
frame_addr + offsetof(struct rt_sigframe, fpstate));
|
|
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
|
|
if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
|
|
goto give_sigsegv;
|
|
}
|
|
|
|
/* Set up to return from userspace. If provided, use a stub
|
|
already in userspace. */
|
|
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
|
err |= __put_user(ka->sa_restorer, &frame->pretcode);
|
|
} else {
|
|
uint16_t val16;
|
|
addr = frame_addr + offsetof(struct rt_sigframe, retcode);
|
|
err |= __put_user(addr, &frame->pretcode);
|
|
/* This is movl $,%eax ; int $0x80 */
|
|
err |= __put_user(0xb8, (char *)(frame->retcode+0));
|
|
err |= __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1));
|
|
val16 = 0x80cd;
|
|
err |= __put_user(val16, (uint16_t *)(frame->retcode+5));
|
|
}
|
|
|
|
if (err)
|
|
goto give_sigsegv;
|
|
|
|
/* Set up registers for signal handler */
|
|
env->regs[R_ESP] = frame_addr;
|
|
env->eip = ka->_sa_handler;
|
|
|
|
cpu_x86_load_seg(env, R_DS, __USER_DS);
|
|
cpu_x86_load_seg(env, R_ES, __USER_DS);
|
|
cpu_x86_load_seg(env, R_SS, __USER_DS);
|
|
cpu_x86_load_seg(env, R_CS, __USER_CS);
|
|
env->eflags &= ~TF_MASK;
|
|
|
|
unlock_user_struct(frame, frame_addr, 1);
|
|
|
|
return;
|
|
|
|
give_sigsegv:
|
|
unlock_user_struct(frame, frame_addr, 1);
|
|
if (sig == TARGET_SIGSEGV)
|
|
ka->_sa_handler = TARGET_SIG_DFL;
|
|
force_sig(TARGET_SIGSEGV /* , current */);
|
|
}
|
|
|
|
static int
|
|
restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax)
|
|
{
|
|
unsigned int err = 0;
|
|
abi_ulong fpstate_addr;
|
|
unsigned int tmpflags;
|
|
|
|
cpu_x86_load_seg(env, R_GS, tswap16(sc->gs));
|
|
cpu_x86_load_seg(env, R_FS, tswap16(sc->fs));
|
|
cpu_x86_load_seg(env, R_ES, tswap16(sc->es));
|
|
cpu_x86_load_seg(env, R_DS, tswap16(sc->ds));
|
|
|
|
env->regs[R_EDI] = tswapl(sc->edi);
|
|
env->regs[R_ESI] = tswapl(sc->esi);
|
|
env->regs[R_EBP] = tswapl(sc->ebp);
|
|
env->regs[R_ESP] = tswapl(sc->esp);
|
|
env->regs[R_EBX] = tswapl(sc->ebx);
|
|
env->regs[R_EDX] = tswapl(sc->edx);
|
|
env->regs[R_ECX] = tswapl(sc->ecx);
|
|
env->eip = tswapl(sc->eip);
|
|
|
|
cpu_x86_load_seg(env, R_CS, lduw(&sc->cs) | 3);
|
|
cpu_x86_load_seg(env, R_SS, lduw(&sc->ss) | 3);
|
|
|
|
tmpflags = tswapl(sc->eflags);
|
|
env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5);
|
|
// regs->orig_eax = -1; /* disable syscall checks */
|
|
|
|
fpstate_addr = tswapl(sc->fpstate);
|
|
if (fpstate_addr != 0) {
|
|
if (!access_ok(VERIFY_READ, fpstate_addr,
|
|
sizeof(struct target_fpstate)))
|
|
goto badframe;
|
|
cpu_x86_frstor(env, fpstate_addr, 1);
|
|
}
|
|
|
|
*peax = tswapl(sc->eax);
|
|
return err;
|
|
badframe:
|
|
return 1;
|
|
}
|
|
|
|
long do_sigreturn(CPUX86State *env)
|
|
{
|
|
struct sigframe *frame;
|
|
abi_ulong frame_addr = env->regs[R_ESP] - 8;
|
|
target_sigset_t target_set;
|
|
sigset_t set;
|
|
int eax, i;
|
|
|
|
#if defined(DEBUG_SIGNAL)
|
|
fprintf(stderr, "do_sigreturn\n");
|
|
#endif
|
|
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
|
|
goto badframe;
|
|
/* set blocked signals */
|
|
if (__get_user(target_set.sig[0], &frame->sc.oldmask))
|
|
goto badframe;
|
|
for(i = 1; i < TARGET_NSIG_WORDS; i++) {
|
|
if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
|
|
goto badframe;
|
|
}
|
|
|
|
target_to_host_sigset_internal(&set, &target_set);
|
|
sigprocmask(SIG_SETMASK, &set, NULL);
|
|
|
|
/* restore registers */
|
|
if (restore_sigcontext(env, &frame->sc, &eax))
|
|
goto badframe;
|
|
unlock_user_struct(frame, frame_addr, 0);
|
|
return eax;
|
|
|
|
badframe:
|
|
unlock_user_struct(frame, frame_addr, 0);
|
|
force_sig(TARGET_SIGSEGV);
|
|
return 0;
|
|
}
|
|
|
|
long do_rt_sigreturn(CPUX86State *env)
|
|
{
|
|
abi_ulong frame_addr;
|
|
struct rt_sigframe *frame;
|
|
sigset_t set;
|
|
int eax;
|
|
|
|
frame_addr = env->regs[R_ESP] - 4;
|
|
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
|
|
goto badframe;
|
|
target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
|
|
sigprocmask(SIG_SETMASK, &set, NULL);
|
|
|
|
if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax))
|
|
goto badframe;
|
|
|
|
if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0,
|
|
get_sp_from_cpustate(env)) == -EFAULT)
|
|
goto badframe;
|
|
|
|
unlock_user_struct(frame, frame_addr, 0);
|
|
return eax;
|
|
|
|
badframe:
|
|
unlock_user_struct(frame, frame_addr, 0);
|
|
force_sig(TARGET_SIGSEGV);
|
|
return 0;
|
|
}
|
|
|
|
#elif defined(TARGET_ARM)
|
|
|
|
struct target_sigcontext {
|
|
abi_ulong trap_no;
|
|
abi_ulong error_code;
|
|
abi_ulong oldmask;
|
|
abi_ulong arm_r0;
|
|
abi_ulong arm_r1;
|
|
abi_ulong arm_r2;
|
|
abi_ulong arm_r3;
|
|
abi_ulong arm_r4;
|
|
abi_ulong arm_r5;
|
|
abi_ulong arm_r6;
|
|
abi_ulong arm_r7;
|
|
abi_ulong arm_r8;
|
|
abi_ulong arm_r9;
|
|
abi_ulong arm_r10;
|
|
abi_ulong arm_fp;
|
|
abi_ulong arm_ip;
|
|
abi_ulong arm_sp;
|
|
abi_ulong arm_lr;
|
|
abi_ulong arm_pc;
|
|
abi_ulong arm_cpsr;
|
|
abi_ulong fault_address;
|
|
};
|
|
|
|
struct target_ucontext_v1 {
|
|
abi_ulong tuc_flags;
|
|
abi_ulong tuc_link;
|
|
target_stack_t tuc_stack;
|
|
struct target_sigcontext tuc_mcontext;
|
|
target_sigset_t tuc_sigmask; /* mask last for extensibility */
|
|
};
|
|
|
|
struct target_ucontext_v2 {
|
|
abi_ulong tuc_flags;
|
|
abi_ulong tuc_link;
|
|
target_stack_t tuc_stack;
|
|
struct target_sigcontext tuc_mcontext;
|
|
target_sigset_t tuc_sigmask; /* mask last for extensibility */
|
|
char __unused[128 - sizeof(sigset_t)];
|
|
abi_ulong tuc_regspace[128] __attribute__((__aligned__(8)));
|
|
};
|
|
|
|
struct sigframe_v1
|
|
{
|
|
struct target_sigcontext sc;
|
|
abi_ulong extramask[TARGET_NSIG_WORDS-1];
|
|
abi_ulong retcode;
|
|
};
|
|
|
|
struct sigframe_v2
|
|
{
|
|
struct target_ucontext_v2 uc;
|
|
abi_ulong retcode;
|
|
};
|
|
|
|
struct rt_sigframe_v1
|
|
{
|
|
abi_ulong pinfo;
|
|
abi_ulong puc;
|
|
struct target_siginfo info;
|
|
struct target_ucontext_v1 uc;
|
|
abi_ulong retcode;
|
|
};
|
|
|
|
struct rt_sigframe_v2
|
|
{
|
|
struct target_siginfo info;
|
|
struct target_ucontext_v2 uc;
|
|
abi_ulong retcode;
|
|
};
|
|
|
|
#define TARGET_CONFIG_CPU_32 1
|
|
|
|
/*
|
|
* For ARM syscalls, we encode the syscall number into the instruction.
|
|
*/
|
|
#define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE))
|
|
#define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE))
|
|
|
|
/*
|
|
* For Thumb syscalls, we pass the syscall number via r7. We therefore
|
|
* need two 16-bit instructions.
|
|
*/
|
|
#define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn))
|
|
#define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn))
|
|
|
|
static const abi_ulong retcodes[4] = {
|
|
SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN,
|
|
SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN
|
|
};
|
|
|
|
|
|
#define __get_user_error(x,p,e) __get_user(x, p)
|
|
|
|
static inline int valid_user_regs(CPUState *regs)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
|
|
CPUState *env, abi_ulong mask)
|
|
{
|
|
__put_user(env->regs[0], &sc->arm_r0);
|
|
__put_user(env->regs[1], &sc->arm_r1);
|
|
__put_user(env->regs[2], &sc->arm_r2);
|
|
__put_user(env->regs[3], &sc->arm_r3);
|
|
__put_user(env->regs[4], &sc->arm_r4);
|
|
__put_user(env->regs[5], &sc->arm_r5);
|
|
__put_user(env->regs[6], &sc->arm_r6);
|
|
__put_user(env->regs[7], &sc->arm_r7);
|
|
__put_user(env->regs[8], &sc->arm_r8);
|
|
__put_user(env->regs[9], &sc->arm_r9);
|
|
__put_user(env->regs[10], &sc->arm_r10);
|
|
__put_user(env->regs[11], &sc->arm_fp);
|
|
__put_user(env->regs[12], &sc->arm_ip);
|
|
__put_user(env->regs[13], &sc->arm_sp);
|
|
__put_user(env->regs[14], &sc->arm_lr);
|
|
__put_user(env->regs[15], &sc->arm_pc);
|
|
#ifdef TARGET_CONFIG_CPU_32
|
|
__put_user(cpsr_read(env), &sc->arm_cpsr);
|
|
#endif
|
|
|
|
__put_user(/* current->thread.trap_no */ 0, &sc->trap_no);
|
|
__put_user(/* current->thread.error_code */ 0, &sc->error_code);
|
|
__put_user(/* current->thread.address */ 0, &sc->fault_address);
|
|
__put_user(mask, &sc->oldmask);
|
|
}
|
|
|
|
static inline abi_ulong
|
|
get_sigframe(struct target_sigaction *ka, CPUState *regs, int framesize)
|
|
{
|
|
unsigned long sp = regs->regs[13];
|
|
|
|
/*
|
|
* This is the X/Open sanctioned signal stack switching.
|
|
*/
|
|
if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp))
|
|
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
|
|
/*
|
|
* ATPCS B01 mandates 8-byte alignment
|
|
*/
|
|
return (sp - framesize) & ~7;
|
|
}
|
|
|
|
static int
|
|
setup_return(CPUState *env, struct target_sigaction *ka,
|
|
abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr)
|
|
{
|
|
abi_ulong handler = ka->_sa_handler;
|
|
abi_ulong retcode;
|
|
int thumb = handler & 1;
|
|
|
|
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
|
retcode = ka->sa_restorer;
|
|
} else {
|
|
unsigned int idx = thumb;
|
|
|
|
if (ka->sa_flags & TARGET_SA_SIGINFO)
|
|
idx += 2;
|
|
|
|
if (__put_user(retcodes[idx], rc))
|
|
return 1;
|
|
#if 0
|
|
flush_icache_range((abi_ulong)rc,
|
|
(abi_ulong)(rc + 1));
|
|
#endif
|
|
retcode = rc_addr + thumb;
|
|
}
|
|
|
|
env->regs[0] = usig;
|
|
env->regs[13] = frame_addr;
|
|
env->regs[14] = retcode;
|
|
env->regs[15] = handler & (thumb ? ~1 : ~3);
|
|
env->thumb = thumb;
|
|
|
|
#if 0
|
|
#ifdef TARGET_CONFIG_CPU_32
|
|
env->cpsr = cpsr;
|
|
#endif
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void setup_sigframe_v2(struct target_ucontext_v2 *uc,
|
|
target_sigset_t *set, CPUState *env)
|
|
{
|
|
struct target_sigaltstack stack;
|
|
int i;
|
|
|
|
/* Clear all the bits of the ucontext we don't use. */
|
|
memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext));
|
|
|
|
memset(&stack, 0, sizeof(stack));
|
|
__put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
|
|
__put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
|
|
__put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
|
|
memcpy(&uc->tuc_stack, &stack, sizeof(stack));
|
|
|
|
setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]);
|
|
/* FIXME: Save coprocessor signal frame. */
|
|
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
|
|
__put_user(set->sig[i], &uc->tuc_sigmask.sig[i]);
|
|
}
|
|
}
|
|
|
|
/* compare linux/arch/arm/kernel/signal.c:setup_frame() */
|
|
static void setup_frame_v1(int usig, struct target_sigaction *ka,
|
|
target_sigset_t *set, CPUState *regs)
|
|
{
|
|
struct sigframe_v1 *frame;
|
|
abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
|
|
int i;
|
|
|
|
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
|
|
return;
|
|
|
|
setup_sigcontext(&frame->sc, regs, set->sig[0]);
|
|
|
|
for(i = 1; i < TARGET_NSIG_WORDS; i++) {
|
|
if (__put_user(set->sig[i], &frame->extramask[i - 1]))
|
|
goto end;
|
|
}
|
|
|
|
setup_return(regs, ka, &frame->retcode, frame_addr, usig,
|
|
frame_addr + offsetof(struct sigframe_v1, retcode));
|
|
|
|
end:
|
|
unlock_user_struct(frame, frame_addr, 1);
|
|
}
|
|
|
|
static void setup_frame_v2(int usig, struct target_sigaction *ka,
|
|
target_sigset_t *set, CPUState *regs)
|
|
{
|
|
struct sigframe_v2 *frame;
|
|
abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
|
|
|
|
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
|
|
return;
|
|
|
|
setup_sigframe_v2(&frame->uc, set, regs);
|
|
|
|
setup_return(regs, ka, &frame->retcode, frame_addr, usig,
|
|
frame_addr + offsetof(struct sigframe_v2, retcode));
|
|
|
|
unlock_user_struct(frame, frame_addr, 1);
|
|
}
|
|
|
|
static void setup_frame(int usig, struct target_sigaction *ka,
|
|
target_sigset_t *set, CPUState *regs)
|
|
{
|
|
if (get_osversion() >= 0x020612) {
|
|
setup_frame_v2(usig, ka, set, regs);
|
|
} else {
|
|
setup_frame_v1(usig, ka, set, regs);
|
|
}
|
|
}
|
|
|
|
/* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */
|
|
static void setup_rt_frame_v1(int usig, struct target_sigaction *ka,
|
|
target_siginfo_t *info,
|
|
target_sigset_t *set, CPUState *env)
|
|
{
|
|
struct rt_sigframe_v1 *frame;
|
|
abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
|
struct target_sigaltstack stack;
|
|
int i;
|
|
abi_ulong info_addr, uc_addr;
|
|
|
|
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
|
|
return /* 1 */;
|
|
|
|
info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info);
|
|
__put_user(info_addr, &frame->pinfo);
|
|
uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc);
|
|
__put_user(uc_addr, &frame->puc);
|
|
copy_siginfo_to_user(&frame->info, info);
|
|
|
|
/* Clear all the bits of the ucontext we don't use. */
|
|
memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext));
|
|
|
|
memset(&stack, 0, sizeof(stack));
|
|
__put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
|
|
__put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
|
|
__put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
|
|
memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
|
|
|
|
setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]);
|
|
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
|
|
if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
|
|
goto end;
|
|
}
|
|
|
|
setup_return(env, ka, &frame->retcode, frame_addr, usig,
|
|
frame_addr + offsetof(struct rt_sigframe_v1, retcode));
|
|
|
|
env->regs[1] = info_addr;
|
|
env->regs[2] = uc_addr;
|
|
|
|
end:
|
|
unlock_user_struct(frame, frame_addr, 1);
|
|
}
|
|
|
|
static void setup_rt_frame_v2(int usig, struct target_sigaction *ka,
|
|
target_siginfo_t *info,
|
|
target_sigset_t *set, CPUState *env)
|
|
{
|
|
struct rt_sigframe_v2 *frame;
|
|
abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
|
abi_ulong info_addr, uc_addr;
|
|
|
|
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
|
|
return /* 1 */;
|
|
|
|
info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info);
|
|
uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc);
|
|
copy_siginfo_to_user(&frame->info, info);
|
|
|
|
setup_sigframe_v2(&frame->uc, set, env);
|
|
|
|
setup_return(env, ka, &frame->retcode, frame_addr, usig,
|
|
frame_addr + offsetof(struct rt_sigframe_v2, retcode));
|
|
|
|
env->regs[1] = info_addr;
|
|
env->regs[2] = uc_addr;
|
|
|
|
unlock_user_struct(frame, frame_addr, 1);
|
|
}
|
|
|
|
static void setup_rt_frame(int usig, struct target_sigaction *ka,
|
|
target_siginfo_t *info,
|
|
target_sigset_t *set, CPUState *env)
|
|
{
|
|
if (get_osversion() >= 0x020612) {
|
|
setup_rt_frame_v2(usig, ka, info, set, env);
|
|
} else {
|
|
setup_rt_frame_v1(usig, ka, info, set, env);
|
|
}
|
|
}
|
|
|
|
static int
|
|
restore_sigcontext(CPUState *env, struct target_sigcontext *sc)
|
|
{
|
|
int err = 0;
|
|
uint32_t cpsr;
|
|
|
|
__get_user_error(env->regs[0], &sc->arm_r0, err);
|
|
__get_user_error(env->regs[1], &sc->arm_r1, err);
|
|
__get_user_error(env->regs[2], &sc->arm_r2, err);
|
|
__get_user_error(env->regs[3], &sc->arm_r3, err);
|
|
__get_user_error(env->regs[4], &sc->arm_r4, err);
|
|
__get_user_error(env->regs[5], &sc->arm_r5, err);
|
|
__get_user_error(env->regs[6], &sc->arm_r6, err);
|
|
__get_user_error(env->regs[7], &sc->arm_r7, err);
|
|
__get_user_error(env->regs[8], &sc->arm_r8, err);
|
|
__get_user_error(env->regs[9], &sc->arm_r9, err);
|
|
__get_user_error(env->regs[10], &sc->arm_r10, err);
|
|
__get_user_error(env->regs[11], &sc->arm_fp, err);
|
|
__get_user_error(env->regs[12], &sc->arm_ip, err);
|
|
__get_user_error(env->regs[13], &sc->arm_sp, err);
|
|
__get_user_error(env->regs[14], &sc->arm_lr, err);
|
|
__get_user_error(env->regs[15], &sc->arm_pc, err);
|
|
#ifdef TARGET_CONFIG_CPU_32
|
|
__get_user_error(cpsr, &sc->arm_cpsr, err);
|
|
cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC);
|
|
#endif
|
|
|
|
err |= !valid_user_regs(env);
|
|
|
|
return err;
|
|
}
|
|
|
|
static long do_sigreturn_v1(CPUState *env)
|
|
{
|
|
abi_ulong frame_addr;
|
|
struct sigframe_v1 *frame;
|
|
target_sigset_t set;
|
|
sigset_t host_set;
|
|
int i;
|
|
|
|
/*
|
|
* Since we stacked the signal on a 64-bit boundary,
|
|
* then 'sp' should be word aligned here. If it's
|
|
* not, then the user is trying to mess with us.
|
|
*/
|
|
if (env->regs[13] & 7)
|
|
goto badframe;
|
|
|
|
frame_addr = env->regs[13];
|
|
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
|
|
goto badframe;
|
|
|
|
if (__get_user(set.sig[0], &frame->sc.oldmask))
|
|
goto badframe;
|
|
for(i = 1; i < TARGET_NSIG_WORDS; i++) {
|
|
if (__get_user(set.sig[i], &frame->extramask[i - 1]))
|
|
goto badframe;
|
|
}
|
|
|
|
target_to_host_sigset_internal(&host_set, &set);
|
|
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
|
|
|
if (restore_sigcontext(env, &frame->sc))
|
|
goto badframe;
|
|
|
|
#if 0
|
|
/* Send SIGTRAP if we're single-stepping */
|
|
if (ptrace_cancel_bpt(current))
|
|
send_sig(SIGTRAP, current, 1);
|
|
#endif
|
|
unlock_user_struct(frame, frame_addr, 0);
|
|
return env->regs[0];
|
|
|
|
badframe:
|
|
unlock_user_struct(frame, frame_addr, 0);
|
|
force_sig(SIGSEGV /* , current */);
|
|
return 0;
|
|
}
|
|
|
|
static int do_sigframe_return_v2(CPUState *env, target_ulong frame_addr,
|
|
struct target_ucontext_v2 *uc)
|
|
{
|
|
sigset_t host_set;
|
|
|
|
target_to_host_sigset(&host_set, &uc->tuc_sigmask);
|
|
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
|
|
|
if (restore_sigcontext(env, &uc->tuc_mcontext))
|
|
return 1;
|
|
|
|
if (do_sigaltstack(frame_addr + offsetof(struct target_ucontext_v2, tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
|
|
return 1;
|
|
|
|
#if 0
|
|
/* Send SIGTRAP if we're single-stepping */
|
|
if (ptrace_cancel_bpt(current))
|
|
send_sig(SIGTRAP, current, 1);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
static long do_sigreturn_v2(CPUState *env)
|
|
{
|
|
abi_ulong frame_addr;
|
|
struct sigframe_v2 *frame;
|
|
|
|
/*
|
|
* Since we stacked the signal on a 64-bit boundary,
|
|
* then 'sp' should be word aligned here. If it's
|
|
* not, then the user is trying to mess with us.
|
|
*/
|
|
if (env->regs[13] & 7)
|
|
goto badframe;
|
|
|
|
frame_addr = env->regs[13];
|
|
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
|
|
goto badframe;
|
|
|
|
if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
|
|
goto badframe;
|
|
|
|
unlock_user_struct(frame, frame_addr, 0);
|
|
return env->regs[0];
|
|
|
|
badframe:
|
|
unlock_user_struct(frame, frame_addr, 0);
|
|
force_sig(SIGSEGV /* , current */);
|
|
return 0;
|
|
}
|
|
|
|
long do_sigreturn(CPUState *env)
|
|
{
|
|
if (get_osversion() >= 0x020612) {
|
|
return do_sigreturn_v2(env);
|
|
} else {
|
|
return do_sigreturn_v1(env);
|
|
}
|
|
}
|
|
|
|
static long do_rt_sigreturn_v1(CPUState *env)
|
|
{
|
|
abi_ulong frame_addr;
|
|
struct rt_sigframe_v1 *frame;
|
|
sigset_t host_set;
|
|
|
|
/*
|
|
* Since we stacked the signal on a 64-bit boundary,
|
|
* then 'sp' should be word aligned here. If it's
|
|
* not, then the user is trying to mess with us.
|
|
*/
|
|
if (env->regs[13] & 7)
|
|
goto badframe;
|
|
|
|
frame_addr = env->regs[13];
|
|
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
|
|
goto badframe;
|
|
|
|
target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask);
|
|
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
|
|
|
if (restore_sigcontext(env, &frame->uc.tuc_mcontext))
|
|
goto badframe;
|
|
|
|
if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
|
|
goto badframe;
|
|
|
|
#if 0
|
|
/* Send SIGTRAP if we're single-stepping */
|
|
if (ptrace_cancel_bpt(current))
|
|
send_sig(SIGTRAP, current, 1);
|
|
#endif
|
|
unlock_user_struct(frame, frame_addr, 0);
|
|
return env->regs[0];
|
|
|
|
badframe:
|
|
unlock_user_struct(frame, frame_addr, 0);
|
|
force_sig(SIGSEGV /* , current */);
|
|
return 0;
|
|
}
|
|
|
|
static long do_rt_sigreturn_v2(CPUState *env)
|
|
{
|
|
abi_ulong frame_addr;
|
|
struct rt_sigframe_v2 *frame;
|
|
|
|
/*
|
|
* Since we stacked the signal on a 64-bit boundary,
|
|
* then 'sp' should be word aligned here. If it's
|
|
* not, then the user is trying to mess with us.
|
|
*/
|
|
if (env->regs[13] & 7)
|
|
goto badframe;
|
|
|
|
frame_addr = env->regs[13];
|
|
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
|
|
goto badframe;
|
|
|
|
if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
|
|
goto badframe;
|
|
|
|
unlock_user_struct(frame, frame_addr, 0);
|
|
return env->regs[0];
|
|
|
|
badframe:
|
|
unlock_user_struct(frame, frame_addr, 0);
|
|
force_sig(SIGSEGV /* , current */);
|
|
return 0;
|
|
}
|
|
|
|
long do_rt_sigreturn(CPUState *env)
|
|
{
|
|
if (get_osversion() >= 0x020612) {
|
|
return do_rt_sigreturn_v2(env);
|
|
} else {
|
|
return do_rt_sigreturn_v1(env);
|
|
}
|
|
}
|
|
|
|
#elif defined(TARGET_SPARC)
|
|
|
|
#define __SUNOS_MAXWIN 31
|
|
|
|
/* This is what SunOS does, so shall I. */
|
|
struct target_sigcontext {
|
|
abi_ulong sigc_onstack; /* state to restore */
|
|
|
|
abi_ulong sigc_mask; /* sigmask to restore */
|
|
abi_ulong sigc_sp; /* stack pointer */
|
|
abi_ulong sigc_pc; /* program counter */
|
|
abi_ulong sigc_npc; /* next program counter */
|
|
abi_ulong sigc_psr; /* for condition codes etc */
|
|
abi_ulong sigc_g1; /* User uses these two registers */
|
|
abi_ulong sigc_o0; /* within the trampoline code. */
|
|
|
|
/* Now comes information regarding the users window set
|
|
* at the time of the signal.
|
|
*/
|
|
abi_ulong sigc_oswins; /* outstanding windows */
|
|
|
|
/* stack ptrs for each regwin buf */
|
|
char *sigc_spbuf[__SUNOS_MAXWIN];
|
|
|
|
/* Windows to restore after signal */
|
|
struct {
|
|
abi_ulong locals[8];
|
|
abi_ulong ins[8];
|
|
} sigc_wbuf[__SUNOS_MAXWIN];
|
|
};
|
|
/* A Sparc stack frame */
|
|
struct sparc_stackf {
|
|
abi_ulong locals[8];
|
|
abi_ulong ins[6];
|
|
struct sparc_stackf *fp;
|
|
abi_ulong callers_pc;
|
|
char *structptr;
|
|
abi_ulong xargs[6];
|
|
abi_ulong xxargs[1];
|
|
};
|
|
|
|
typedef struct {
|
|
struct {
|
|
abi_ulong psr;
|
|
abi_ulong pc;
|
|
abi_ulong npc;
|
|
abi_ulong y;
|
|
abi_ulong u_regs[16]; /* globals and ins */
|
|
} si_regs;
|
|
int si_mask;
|
|
} __siginfo_t;
|
|
|
|
typedef struct {
|
|
unsigned long si_float_regs [32];
|
|
unsigned long si_fsr;
|
|
unsigned long si_fpqdepth;
|
|
struct {
|
|
unsigned long *insn_addr;
|
|
unsigned long insn;
|
|
} si_fpqueue [16];
|
|
} qemu_siginfo_fpu_t;
|
|
|
|
|
|
struct target_signal_frame {
|
|
struct sparc_stackf ss;
|
|
__siginfo_t info;
|
|
abi_ulong fpu_save;
|
|
abi_ulong insns[2] __attribute__ ((aligned (8)));
|
|
abi_ulong extramask[TARGET_NSIG_WORDS - 1];
|
|
abi_ulong extra_size; /* Should be 0 */
|
|
qemu_siginfo_fpu_t fpu_state;
|
|
};
|
|
struct target_rt_signal_frame {
|
|
struct sparc_stackf ss;
|
|
siginfo_t info;
|
|
abi_ulong regs[20];
|
|
sigset_t mask;
|
|
abi_ulong fpu_save;
|
|
unsigned int insns[2];
|
|
stack_t stack;
|
|
unsigned int extra_size; /* Should be 0 */
|
|
qemu_siginfo_fpu_t fpu_state;
|
|
};
|
|
|
|
#define UREG_O0 16
|
|
#define UREG_O6 22
|
|
#define UREG_I0 0
|
|
#define UREG_I1 1
|
|
#define UREG_I2 2
|
|
#define UREG_I3 3
|
|
#define UREG_I4 4
|
|
#define UREG_I5 5
|
|
#define UREG_I6 6
|
|
#define UREG_I7 7
|
|
#define UREG_L0 8
|
|
#define UREG_FP UREG_I6
|
|
#define UREG_SP UREG_O6
|
|
|
|
static inline abi_ulong get_sigframe(struct target_sigaction *sa,
|
|
CPUState *env, unsigned long framesize)
|
|
{
|
|
abi_ulong sp;
|
|
|
|
sp = env->regwptr[UREG_FP];
|
|
|
|
/* This is the X/Open sanctioned signal stack switching. */
|
|
if (sa->sa_flags & TARGET_SA_ONSTACK) {
|
|
if (!on_sig_stack(sp)
|
|
&& !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7))
|
|
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
|
|
}
|
|
return sp - framesize;
|
|
}
|
|
|
|
static int
|
|
setup___siginfo(__siginfo_t *si, CPUState *env, abi_ulong mask)
|
|
{
|
|
int err = 0, i;
|
|
|
|
err |= __put_user(env->psr, &si->si_regs.psr);
|
|
err |= __put_user(env->pc, &si->si_regs.pc);
|
|
err |= __put_user(env->npc, &si->si_regs.npc);
|
|
err |= __put_user(env->y, &si->si_regs.y);
|
|
for (i=0; i < 8; i++) {
|
|
err |= __put_user(env->gregs[i], &si->si_regs.u_regs[i]);
|
|
}
|
|
for (i=0; i < 8; i++) {
|
|
err |= __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]);
|
|
}
|
|
err |= __put_user(mask, &si->si_mask);
|
|
return err;
|
|
}
|
|
|
|
#if 0
|
|
static int
|
|
setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
|
|
CPUState *env, unsigned long mask)
|
|
{
|
|
int err = 0;
|
|
|
|
err |= __put_user(mask, &sc->sigc_mask);
|
|
err |= __put_user(env->regwptr[UREG_SP], &sc->sigc_sp);
|
|
err |= __put_user(env->pc, &sc->sigc_pc);
|
|
err |= __put_user(env->npc, &sc->sigc_npc);
|
|
err |= __put_user(env->psr, &sc->sigc_psr);
|
|
err |= __put_user(env->gregs[1], &sc->sigc_g1);
|
|
err |= __put_user(env->regwptr[UREG_O0], &sc->sigc_o0);
|
|
|
|
return err;
|
|
}
|
|
#endif
|
|
#define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7)))
|
|
|
|
static void setup_frame(int sig, struct target_sigaction *ka,
|
|
target_sigset_t *set, CPUState *env)
|
|
{
|
|
abi_ulong sf_addr;
|
|
struct target_signal_frame *sf;
|
|
int sigframe_size, err, i;
|
|
|
|
/* 1. Make sure everything is clean */
|
|
//synchronize_user_stack();
|
|
|
|
sigframe_size = NF_ALIGNEDSZ;
|
|
sf_addr = get_sigframe(ka, env, sigframe_size);
|
|
|
|
sf = lock_user(VERIFY_WRITE, sf_addr,
|
|
sizeof(struct target_signal_frame), 0);
|
|
if (!sf)
|
|
goto sigsegv;
|
|
|
|
//fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
|
|
#if 0
|
|
if (invalid_frame_pointer(sf, sigframe_size))
|
|
goto sigill_and_return;
|
|
#endif
|
|
/* 2. Save the current process state */
|
|
err = setup___siginfo(&sf->info, env, set->sig[0]);
|
|
err |= __put_user(0, &sf->extra_size);
|
|
|
|
//err |= save_fpu_state(regs, &sf->fpu_state);
|
|
//err |= __put_user(&sf->fpu_state, &sf->fpu_save);
|
|
|
|
err |= __put_user(set->sig[0], &sf->info.si_mask);
|
|
for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
|
|
err |= __put_user(set->sig[i + 1], &sf->extramask[i]);
|
|
}
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
err |= __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]);
|
|
}
|
|
for (i = 0; i < 8; i++) {
|
|
err |= __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]);
|
|
}
|
|
if (err)
|
|
goto sigsegv;
|
|
|
|
/* 3. signal handler back-trampoline and parameters */
|
|
env->regwptr[UREG_FP] = sf_addr;
|
|
env->regwptr[UREG_I0] = sig;
|
|
env->regwptr[UREG_I1] = sf_addr +
|
|
offsetof(struct target_signal_frame, info);
|
|
env->regwptr[UREG_I2] = sf_addr +
|
|
offsetof(struct target_signal_frame, info);
|
|
|
|
/* 4. signal handler */
|
|
env->pc = ka->_sa_handler;
|
|
env->npc = (env->pc + 4);
|
|
/* 5. return to kernel instructions */
|
|
if (ka->sa_restorer)
|
|
env->regwptr[UREG_I7] = ka->sa_restorer;
|
|
else {
|
|
uint32_t val32;
|
|
|
|
env->regwptr[UREG_I7] = sf_addr +
|
|
offsetof(struct target_signal_frame, insns) - 2 * 4;
|
|
|
|
/* mov __NR_sigreturn, %g1 */
|
|
val32 = 0x821020d8;
|
|
err |= __put_user(val32, &sf->insns[0]);
|
|
|
|
/* t 0x10 */
|
|
val32 = 0x91d02010;
|
|
err |= __put_user(val32, &sf->insns[1]);
|
|
if (err)
|
|
goto sigsegv;
|
|
|
|
/* Flush instruction space. */
|
|
//flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
|
|
// tb_flush(env);
|
|
}
|
|
unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
|
|
return;
|
|
#if 0
|
|
sigill_and_return:
|
|
force_sig(TARGET_SIGILL);
|
|
#endif
|
|
sigsegv:
|
|
//fprintf(stderr, "force_sig\n");
|
|
unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
|
|
force_sig(TARGET_SIGSEGV);
|
|
}
|
|
static inline int
|
|
restore_fpu_state(CPUState *env, qemu_siginfo_fpu_t *fpu)
|
|
{
|
|
int err;
|
|
#if 0
|
|
#ifdef CONFIG_SMP
|
|
if (current->flags & PF_USEDFPU)
|
|
regs->psr &= ~PSR_EF;
|
|
#else
|
|
if (current == last_task_used_math) {
|
|
last_task_used_math = 0;
|
|
regs->psr &= ~PSR_EF;
|
|
}
|
|
#endif
|
|
current->used_math = 1;
|
|
current->flags &= ~PF_USEDFPU;
|
|
#endif
|
|
#if 0
|
|
if (verify_area (VERIFY_READ, fpu, sizeof(*fpu)))
|
|
return -EFAULT;
|
|
#endif
|
|
|
|
#if 0
|
|
/* XXX: incorrect */
|
|
err = __copy_from_user(&env->fpr[0], &fpu->si_float_regs[0],
|
|
(sizeof(unsigned long) * 32));
|
|
#endif
|
|
err |= __get_user(env->fsr, &fpu->si_fsr);
|
|
#if 0
|
|
err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
|
|
if (current->thread.fpqdepth != 0)
|
|
err |= __copy_from_user(¤t->thread.fpqueue[0],
|
|
&fpu->si_fpqueue[0],
|
|
((sizeof(unsigned long) +
|
|
(sizeof(unsigned long *)))*16));
|
|
#endif
|
|
return err;
|
|
}
|
|
|
|
|
|
static void setup_rt_frame(int sig, struct target_sigaction *ka,
|
|
target_siginfo_t *info,
|
|
target_sigset_t *set, CPUState *env)
|
|
{
|
|
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
|
}
|
|
|
|
long do_sigreturn(CPUState *env)
|
|
{
|
|
abi_ulong sf_addr;
|
|
struct target_signal_frame *sf;
|
|
uint32_t up_psr, pc, npc;
|
|
target_sigset_t set;
|
|
sigset_t host_set;
|
|
abi_ulong fpu_save_addr;
|
|
int err, i;
|
|
|
|
sf_addr = env->regwptr[UREG_FP];
|
|
if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1))
|
|
goto segv_and_exit;
|
|
#if 0
|
|
fprintf(stderr, "sigreturn\n");
|
|
fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
|
|
#endif
|
|
//cpu_dump_state(env, stderr, fprintf, 0);
|
|
|
|
/* 1. Make sure we are not getting garbage from the user */
|
|
|
|
if (sf_addr & 3)
|
|
goto segv_and_exit;
|
|
|
|
err = __get_user(pc, &sf->info.si_regs.pc);
|
|
err |= __get_user(npc, &sf->info.si_regs.npc);
|
|
|
|
if ((pc | npc) & 3)
|
|
goto segv_and_exit;
|
|
|
|
/* 2. Restore the state */
|
|
err |= __get_user(up_psr, &sf->info.si_regs.psr);
|
|
|
|
/* User can only change condition codes and FPU enabling in %psr. */
|
|
env->psr = (up_psr & (PSR_ICC /* | PSR_EF */))
|
|
| (env->psr & ~(PSR_ICC /* | PSR_EF */));
|
|
|
|
env->pc = pc;
|
|
env->npc = npc;
|
|
err |= __get_user(env->y, &sf->info.si_regs.y);
|
|
for (i=0; i < 8; i++) {
|
|
err |= __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]);
|
|
}
|
|
for (i=0; i < 8; i++) {
|
|
err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]);
|
|
}
|
|
|
|
err |= __get_user(fpu_save_addr, &sf->fpu_save);
|
|
|
|
//if (fpu_save)
|
|
// err |= restore_fpu_state(env, fpu_save);
|
|
|
|
/* This is pretty much atomic, no amount locking would prevent
|
|
* the races which exist anyways.
|
|
*/
|
|
err |= __get_user(set.sig[0], &sf->info.si_mask);
|
|
for(i = 1; i < TARGET_NSIG_WORDS; i++) {
|
|
err |= (__get_user(set.sig[i], &sf->extramask[i - 1]));
|
|
}
|
|
|
|
target_to_host_sigset_internal(&host_set, &set);
|
|
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
|
|
|
if (err)
|
|
goto segv_and_exit;
|
|
unlock_user_struct(sf, sf_addr, 0);
|
|
return env->regwptr[0];
|
|
|
|
segv_and_exit:
|
|
unlock_user_struct(sf, sf_addr, 0);
|
|
force_sig(TARGET_SIGSEGV);
|
|
}
|
|
|
|
long do_rt_sigreturn(CPUState *env)
|
|
{
|
|
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
|
return -TARGET_ENOSYS;
|
|
}
|
|
|
|
#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
|
|
#define MC_TSTATE 0
|
|
#define MC_PC 1
|
|
#define MC_NPC 2
|
|
#define MC_Y 3
|
|
#define MC_G1 4
|
|
#define MC_G2 5
|
|
#define MC_G3 6
|
|
#define MC_G4 7
|
|
#define MC_G5 8
|
|
#define MC_G6 9
|
|
#define MC_G7 10
|
|
#define MC_O0 11
|
|
#define MC_O1 12
|
|
#define MC_O2 13
|
|
#define MC_O3 14
|
|
#define MC_O4 15
|
|
#define MC_O5 16
|
|
#define MC_O6 17
|
|
#define MC_O7 18
|
|
#define MC_NGREG 19
|
|
|
|
typedef abi_ulong target_mc_greg_t;
|
|
typedef target_mc_greg_t target_mc_gregset_t[MC_NGREG];
|
|
|
|
struct target_mc_fq {
|
|
abi_ulong *mcfq_addr;
|
|
uint32_t mcfq_insn;
|
|
};
|
|
|
|
struct target_mc_fpu {
|
|
union {
|
|
uint32_t sregs[32];
|
|
uint64_t dregs[32];
|
|
//uint128_t qregs[16];
|
|
} mcfpu_fregs;
|
|
abi_ulong mcfpu_fsr;
|
|
abi_ulong mcfpu_fprs;
|
|
abi_ulong mcfpu_gsr;
|
|
struct target_mc_fq *mcfpu_fq;
|
|
unsigned char mcfpu_qcnt;
|
|
unsigned char mcfpu_qentsz;
|
|
unsigned char mcfpu_enab;
|
|
};
|
|
typedef struct target_mc_fpu target_mc_fpu_t;
|
|
|
|
typedef struct {
|
|
target_mc_gregset_t mc_gregs;
|
|
target_mc_greg_t mc_fp;
|
|
target_mc_greg_t mc_i7;
|
|
target_mc_fpu_t mc_fpregs;
|
|
} target_mcontext_t;
|
|
|
|
struct target_ucontext {
|
|
struct target_ucontext *uc_link;
|
|
abi_ulong uc_flags;
|
|
target_sigset_t uc_sigmask;
|
|
target_mcontext_t uc_mcontext;
|
|
};
|
|
|
|
/* A V9 register window */
|
|
struct target_reg_window {
|
|
abi_ulong locals[8];
|
|
abi_ulong ins[8];
|
|
};
|
|
|
|
#define TARGET_STACK_BIAS 2047
|
|
|
|
/* {set, get}context() needed for 64-bit SparcLinux userland. */
|
|
void sparc64_set_context(CPUSPARCState *env)
|
|
{
|
|
abi_ulong ucp_addr;
|
|
struct target_ucontext *ucp;
|
|
target_mc_gregset_t *grp;
|
|
abi_ulong pc, npc, tstate;
|
|
abi_ulong fp, i7, w_addr;
|
|
unsigned char fenab;
|
|
int err;
|
|
unsigned int i;
|
|
|
|
ucp_addr = env->regwptr[UREG_I0];
|
|
if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1))
|
|
goto do_sigsegv;
|
|
grp = &ucp->uc_mcontext.mc_gregs;
|
|
err = __get_user(pc, &((*grp)[MC_PC]));
|
|
err |= __get_user(npc, &((*grp)[MC_NPC]));
|
|
if (err || ((pc | npc) & 3))
|
|
goto do_sigsegv;
|
|
if (env->regwptr[UREG_I1]) {
|
|
target_sigset_t target_set;
|
|
sigset_t set;
|
|
|
|
if (TARGET_NSIG_WORDS == 1) {
|
|
if (__get_user(target_set.sig[0], &ucp->uc_sigmask.sig[0]))
|
|
goto do_sigsegv;
|
|
} else {
|
|
abi_ulong *src, *dst;
|
|
src = ucp->uc_sigmask.sig;
|
|
dst = target_set.sig;
|
|
for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong);
|
|
i++, dst++, src++)
|
|
err |= __get_user(*dst, src);
|
|
if (err)
|
|
goto do_sigsegv;
|
|
}
|
|
target_to_host_sigset_internal(&set, &target_set);
|
|
sigprocmask(SIG_SETMASK, &set, NULL);
|
|
}
|
|
env->pc = pc;
|
|
env->npc = npc;
|
|
err |= __get_user(env->y, &((*grp)[MC_Y]));
|
|
err |= __get_user(tstate, &((*grp)[MC_TSTATE]));
|
|
env->asi = (tstate >> 24) & 0xff;
|
|
PUT_CCR(env, tstate >> 32);
|
|
PUT_CWP64(env, tstate & 0x1f);
|
|
err |= __get_user(env->gregs[1], (&(*grp)[MC_G1]));
|
|
err |= __get_user(env->gregs[2], (&(*grp)[MC_G2]));
|
|
err |= __get_user(env->gregs[3], (&(*grp)[MC_G3]));
|
|
err |= __get_user(env->gregs[4], (&(*grp)[MC_G4]));
|
|
err |= __get_user(env->gregs[5], (&(*grp)[MC_G5]));
|
|
err |= __get_user(env->gregs[6], (&(*grp)[MC_G6]));
|
|
err |= __get_user(env->gregs[7], (&(*grp)[MC_G7]));
|
|
err |= __get_user(env->regwptr[UREG_I0], (&(*grp)[MC_O0]));
|
|
err |= __get_user(env->regwptr[UREG_I1], (&(*grp)[MC_O1]));
|
|
err |= __get_user(env->regwptr[UREG_I2], (&(*grp)[MC_O2]));
|
|
err |= __get_user(env->regwptr[UREG_I3], (&(*grp)[MC_O3]));
|
|
err |= __get_user(env->regwptr[UREG_I4], (&(*grp)[MC_O4]));
|
|
err |= __get_user(env->regwptr[UREG_I5], (&(*grp)[MC_O5]));
|
|
err |= __get_user(env->regwptr[UREG_I6], (&(*grp)[MC_O6]));
|
|
err |= __get_user(env->regwptr[UREG_I7], (&(*grp)[MC_O7]));
|
|
|
|
err |= __get_user(fp, &(ucp->uc_mcontext.mc_fp));
|
|
err |= __get_user(i7, &(ucp->uc_mcontext.mc_i7));
|
|
|
|
w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
|
|
if (put_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
|
|
abi_ulong) != 0)
|
|
goto do_sigsegv;
|
|
if (put_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
|
|
abi_ulong) != 0)
|
|
goto do_sigsegv;
|
|
err |= __get_user(fenab, &(ucp->uc_mcontext.mc_fpregs.mcfpu_enab));
|
|
err |= __get_user(env->fprs, &(ucp->uc_mcontext.mc_fpregs.mcfpu_fprs));
|
|
{
|
|
uint32_t *src, *dst;
|
|
src = ucp->uc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
|
|
dst = env->fpr;
|
|
/* XXX: check that the CPU storage is the same as user context */
|
|
for (i = 0; i < 64; i++, dst++, src++)
|
|
err |= __get_user(*dst, src);
|
|
}
|
|
err |= __get_user(env->fsr,
|
|
&(ucp->uc_mcontext.mc_fpregs.mcfpu_fsr));
|
|
err |= __get_user(env->gsr,
|
|
&(ucp->uc_mcontext.mc_fpregs.mcfpu_gsr));
|
|
if (err)
|
|
goto do_sigsegv;
|
|
unlock_user_struct(ucp, ucp_addr, 0);
|
|
return;
|
|
do_sigsegv:
|
|
unlock_user_struct(ucp, ucp_addr, 0);
|
|
force_sig(SIGSEGV);
|
|
}
|
|
|
|
void sparc64_get_context(CPUSPARCState *env)
|
|
{
|
|
abi_ulong ucp_addr;
|
|
struct target_ucontext *ucp;
|
|
target_mc_gregset_t *grp;
|
|
target_mcontext_t *mcp;
|
|
abi_ulong fp, i7, w_addr;
|
|
int err;
|
|
unsigned int i;
|
|
target_sigset_t target_set;
|
|
sigset_t set;
|
|
|
|
ucp_addr = env->regwptr[UREG_I0];
|
|
if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0))
|
|
goto do_sigsegv;
|
|
|
|
mcp = &ucp->uc_mcontext;
|
|
grp = &mcp->mc_gregs;
|
|
|
|
/* Skip over the trap instruction, first. */
|
|
env->pc = env->npc;
|
|
env->npc += 4;
|
|
|
|
err = 0;
|
|
|
|
sigprocmask(0, NULL, &set);
|
|
host_to_target_sigset_internal(&target_set, &set);
|
|
if (TARGET_NSIG_WORDS == 1) {
|
|
err |= __put_user(target_set.sig[0],
|
|
(abi_ulong *)&ucp->uc_sigmask);
|
|
} else {
|
|
abi_ulong *src, *dst;
|
|
src = target_set.sig;
|
|
dst = ucp->uc_sigmask.sig;
|
|
for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong);
|
|
i++, dst++, src++)
|
|
err |= __put_user(*src, dst);
|
|
if (err)
|
|
goto do_sigsegv;
|
|
}
|
|
|
|
/* XXX: tstate must be saved properly */
|
|
// err |= __put_user(env->tstate, &((*grp)[MC_TSTATE]));
|
|
err |= __put_user(env->pc, &((*grp)[MC_PC]));
|
|
err |= __put_user(env->npc, &((*grp)[MC_NPC]));
|
|
err |= __put_user(env->y, &((*grp)[MC_Y]));
|
|
err |= __put_user(env->gregs[1], &((*grp)[MC_G1]));
|
|
err |= __put_user(env->gregs[2], &((*grp)[MC_G2]));
|
|
err |= __put_user(env->gregs[3], &((*grp)[MC_G3]));
|
|
err |= __put_user(env->gregs[4], &((*grp)[MC_G4]));
|
|
err |= __put_user(env->gregs[5], &((*grp)[MC_G5]));
|
|
err |= __put_user(env->gregs[6], &((*grp)[MC_G6]));
|
|
err |= __put_user(env->gregs[7], &((*grp)[MC_G7]));
|
|
err |= __put_user(env->regwptr[UREG_I0], &((*grp)[MC_O0]));
|
|
err |= __put_user(env->regwptr[UREG_I1], &((*grp)[MC_O1]));
|
|
err |= __put_user(env->regwptr[UREG_I2], &((*grp)[MC_O2]));
|
|
err |= __put_user(env->regwptr[UREG_I3], &((*grp)[MC_O3]));
|
|
err |= __put_user(env->regwptr[UREG_I4], &((*grp)[MC_O4]));
|
|
err |= __put_user(env->regwptr[UREG_I5], &((*grp)[MC_O5]));
|
|
err |= __put_user(env->regwptr[UREG_I6], &((*grp)[MC_O6]));
|
|
err |= __put_user(env->regwptr[UREG_I7], &((*grp)[MC_O7]));
|
|
|
|
w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
|
|
fp = i7 = 0;
|
|
if (get_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
|
|
abi_ulong) != 0)
|
|
goto do_sigsegv;
|
|
if (get_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
|
|
abi_ulong) != 0)
|
|
goto do_sigsegv;
|
|
err |= __put_user(fp, &(mcp->mc_fp));
|
|
err |= __put_user(i7, &(mcp->mc_i7));
|
|
|
|
{
|
|
uint32_t *src, *dst;
|
|
src = env->fpr;
|
|
dst = ucp->uc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
|
|
/* XXX: check that the CPU storage is the same as user context */
|
|
for (i = 0; i < 64; i++, dst++, src++)
|
|
err |= __put_user(*src, dst);
|
|
}
|
|
err |= __put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr));
|
|
err |= __put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr));
|
|
err |= __put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs));
|
|
|
|
if (err)
|
|
goto do_sigsegv;
|
|
unlock_user_struct(ucp, ucp_addr, 1);
|
|
return;
|
|
do_sigsegv:
|
|
unlock_user_struct(ucp, ucp_addr, 1);
|
|
force_sig(SIGSEGV);
|
|
}
|
|
#endif
|
|
#elif defined(TARGET_ABI_MIPSN64)
|
|
|
|
# warning signal handling not implemented
|
|
|
|
static void setup_frame(int sig, struct target_sigaction *ka,
|
|
target_sigset_t *set, CPUState *env)
|
|
{
|
|
fprintf(stderr, "setup_frame: not implemented\n");
|
|
}
|
|
|
|
static void setup_rt_frame(int sig, struct target_sigaction *ka,
|
|
target_siginfo_t *info,
|
|
target_sigset_t *set, CPUState *env)
|
|
{
|
|
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
|
}
|
|
|
|
long do_sigreturn(CPUState *env)
|
|
{
|
|
fprintf(stderr, "do_sigreturn: not implemented\n");
|
|
return -TARGET_ENOSYS;
|
|
}
|
|
|
|
long do_rt_sigreturn(CPUState *env)
|
|
{
|
|
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
|
return -TARGET_ENOSYS;
|
|
}
|
|
|
|
#elif defined(TARGET_ABI_MIPSN32)
|
|
|
|
# warning signal handling not implemented
|
|
|
|
static void setup_frame(int sig, struct target_sigaction *ka,
|
|
target_sigset_t *set, CPUState *env)
|
|
{
|
|
fprintf(stderr, "setup_frame: not implemented\n");
|
|
}
|
|
|
|
static void setup_rt_frame(int sig, struct target_sigaction *ka,
|
|
target_siginfo_t *info,
|
|
target_sigset_t *set, CPUState *env)
|
|
{
|
|
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
|
}
|
|
|
|
long do_sigreturn(CPUState *env)
|
|
{
|
|
fprintf(stderr, "do_sigreturn: not implemented\n");
|
|
return -TARGET_ENOSYS;
|
|
}
|
|
|
|
long do_rt_sigreturn(CPUState *env)
|
|
{
|
|
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
|
return -TARGET_ENOSYS;
|
|
}
|
|
|
|
#elif defined(TARGET_ABI_MIPSO32)
|
|
|
|
struct target_sigcontext {
|
|
uint32_t sc_regmask; /* Unused */
|
|
uint32_t sc_status;
|
|
uint64_t sc_pc;
|
|
uint64_t sc_regs[32];
|
|
uint64_t sc_fpregs[32];
|
|
uint32_t sc_ownedfp; /* Unused */
|
|
uint32_t sc_fpc_csr;
|
|
uint32_t sc_fpc_eir; /* Unused */
|
|
uint32_t sc_used_math;
|
|
uint32_t sc_dsp; /* dsp status, was sc_ssflags */
|
|
uint64_t sc_mdhi;
|
|
uint64_t sc_mdlo;
|
|
target_ulong sc_hi1; /* Was sc_cause */
|
|
target_ulong sc_lo1; /* Was sc_badvaddr */
|
|
target_ulong sc_hi2; /* Was sc_sigset[4] */
|
|
target_ulong sc_lo2;
|
|
target_ulong sc_hi3;
|
|
target_ulong sc_lo3;
|
|
};
|
|
|
|
struct sigframe {
|
|
uint32_t sf_ass[4]; /* argument save space for o32 */
|
|
uint32_t sf_code[2]; /* signal trampoline */
|
|
struct target_sigcontext sf_sc;
|
|
target_sigset_t sf_mask;
|
|
};
|
|
|
|
struct target_ucontext {
|
|
target_ulong uc_flags;
|
|
target_ulong uc_link;
|
|
target_stack_t uc_stack;
|
|
struct target_sigcontext uc_mcontext;
|
|
target_sigset_t uc_sigmask;
|
|
};
|
|
|
|
struct target_rt_sigframe {
|
|
uint32_t rs_ass[4]; /* argument save space for o32 */
|
|
uint32_t rs_code[2]; /* signal trampoline */
|
|
struct target_siginfo rs_info;
|
|
struct target_ucontext rs_uc;
|
|
};
|
|
|
|
/* Install trampoline to jump back from signal handler */
|
|
static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall)
|
|
{
|
|
int err;
|
|
|
|
/*
|
|
* Set up the return code ...
|
|
*
|
|
* li v0, __NR__foo_sigreturn
|
|
* syscall
|
|
*/
|
|
|
|
err = __put_user(0x24020000 + syscall, tramp + 0);
|
|
err |= __put_user(0x0000000c , tramp + 1);
|
|
/* flush_cache_sigtramp((unsigned long) tramp); */
|
|
return err;
|
|
}
|
|
|
|
static inline int
|
|
setup_sigcontext(CPUState *regs, struct target_sigcontext *sc)
|
|
{
|
|
int err = 0;
|
|
|
|
err |= __put_user(regs->active_tc.PC, &sc->sc_pc);
|
|
|
|
#define save_gp_reg(i) do { \
|
|
err |= __put_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \
|
|
} while(0)
|
|
__put_user(0, &sc->sc_regs[0]); save_gp_reg(1); save_gp_reg(2);
|
|
save_gp_reg(3); save_gp_reg(4); save_gp_reg(5); save_gp_reg(6);
|
|
save_gp_reg(7); save_gp_reg(8); save_gp_reg(9); save_gp_reg(10);
|
|
save_gp_reg(11); save_gp_reg(12); save_gp_reg(13); save_gp_reg(14);
|
|
save_gp_reg(15); save_gp_reg(16); save_gp_reg(17); save_gp_reg(18);
|
|
save_gp_reg(19); save_gp_reg(20); save_gp_reg(21); save_gp_reg(22);
|
|
save_gp_reg(23); save_gp_reg(24); save_gp_reg(25); save_gp_reg(26);
|
|
save_gp_reg(27); save_gp_reg(28); save_gp_reg(29); save_gp_reg(30);
|
|
save_gp_reg(31);
|
|
#undef save_gp_reg
|
|
|
|
err |= __put_user(regs->active_tc.HI[0], &sc->sc_mdhi);
|
|
err |= __put_user(regs->active_tc.LO[0], &sc->sc_mdlo);
|
|
|
|
/* Not used yet, but might be useful if we ever have DSP suppport */
|
|
#if 0
|
|
if (cpu_has_dsp) {
|
|
err |= __put_user(mfhi1(), &sc->sc_hi1);
|
|
err |= __put_user(mflo1(), &sc->sc_lo1);
|
|
err |= __put_user(mfhi2(), &sc->sc_hi2);
|
|
err |= __put_user(mflo2(), &sc->sc_lo2);
|
|
err |= __put_user(mfhi3(), &sc->sc_hi3);
|
|
err |= __put_user(mflo3(), &sc->sc_lo3);
|
|
err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
|
|
}
|
|
/* same with 64 bit */
|
|
#ifdef CONFIG_64BIT
|
|
err |= __put_user(regs->hi, &sc->sc_hi[0]);
|
|
err |= __put_user(regs->lo, &sc->sc_lo[0]);
|
|
if (cpu_has_dsp) {
|
|
err |= __put_user(mfhi1(), &sc->sc_hi[1]);
|
|
err |= __put_user(mflo1(), &sc->sc_lo[1]);
|
|
err |= __put_user(mfhi2(), &sc->sc_hi[2]);
|
|
err |= __put_user(mflo2(), &sc->sc_lo[2]);
|
|
err |= __put_user(mfhi3(), &sc->sc_hi[3]);
|
|
err |= __put_user(mflo3(), &sc->sc_lo[3]);
|
|
err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
#if 0
|
|
err |= __put_user(!!used_math(), &sc->sc_used_math);
|
|
|
|
if (!used_math())
|
|
goto out;
|
|
|
|
/*
|
|
* Save FPU state to signal context. Signal handler will "inherit"
|
|
* current FPU state.
|
|
*/
|
|
preempt_disable();
|
|
|
|
if (!is_fpu_owner()) {
|
|
own_fpu();
|
|
restore_fp(current);
|
|
}
|
|
err |= save_fp_context(sc);
|
|
|
|
preempt_enable();
|
|
out:
|
|
#endif
|
|
return err;
|
|
}
|
|
|
|
static inline int
|
|
restore_sigcontext(CPUState *regs, struct target_sigcontext *sc)
|
|
{
|
|
int err = 0;
|
|
|
|
err |= __get_user(regs->CP0_EPC, &sc->sc_pc);
|
|
|
|
err |= __get_user(regs->active_tc.HI[0], &sc->sc_mdhi);
|
|
err |= __get_user(regs->active_tc.LO[0], &sc->sc_mdlo);
|
|
|
|
#define restore_gp_reg(i) do { \
|
|
err |= __get_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \
|
|
} while(0)
|
|
restore_gp_reg( 1); restore_gp_reg( 2); restore_gp_reg( 3);
|
|
restore_gp_reg( 4); restore_gp_reg( 5); restore_gp_reg( 6);
|
|
restore_gp_reg( 7); restore_gp_reg( 8); restore_gp_reg( 9);
|
|
restore_gp_reg(10); restore_gp_reg(11); restore_gp_reg(12);
|
|
restore_gp_reg(13); restore_gp_reg(14); restore_gp_reg(15);
|
|
restore_gp_reg(16); restore_gp_reg(17); restore_gp_reg(18);
|
|
restore_gp_reg(19); restore_gp_reg(20); restore_gp_reg(21);
|
|
restore_gp_reg(22); restore_gp_reg(23); restore_gp_reg(24);
|
|
restore_gp_reg(25); restore_gp_reg(26); restore_gp_reg(27);
|
|
restore_gp_reg(28); restore_gp_reg(29); restore_gp_reg(30);
|
|
restore_gp_reg(31);
|
|
#undef restore_gp_reg
|
|
|
|
#if 0
|
|
if (cpu_has_dsp) {
|
|
err |= __get_user(treg, &sc->sc_hi1); mthi1(treg);
|
|
err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg);
|
|
err |= __get_user(treg, &sc->sc_hi2); mthi2(treg);
|
|
err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg);
|
|
err |= __get_user(treg, &sc->sc_hi3); mthi3(treg);
|
|
err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg);
|
|
err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
|
|
}
|
|
#ifdef CONFIG_64BIT
|
|
err |= __get_user(regs->hi, &sc->sc_hi[0]);
|
|
err |= __get_user(regs->lo, &sc->sc_lo[0]);
|
|
if (cpu_has_dsp) {
|
|
err |= __get_user(treg, &sc->sc_hi[1]); mthi1(treg);
|
|
err |= __get_user(treg, &sc->sc_lo[1]); mthi1(treg);
|
|
err |= __get_user(treg, &sc->sc_hi[2]); mthi2(treg);
|
|
err |= __get_user(treg, &sc->sc_lo[2]); mthi2(treg);
|
|
err |= __get_user(treg, &sc->sc_hi[3]); mthi3(treg);
|
|
err |= __get_user(treg, &sc->sc_lo[3]); mthi3(treg);
|
|
err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
|
|
}
|
|
#endif
|
|
|
|
err |= __get_user(used_math, &sc->sc_used_math);
|
|
conditional_used_math(used_math);
|
|
|
|
preempt_disable();
|
|
|
|
if (used_math()) {
|
|
/* restore fpu context if we have used it before */
|
|
own_fpu();
|
|
err |= restore_fp_context(sc);
|
|
} else {
|
|
/* signal handler may have used FPU. Give it up. */
|
|
lose_fpu();
|
|
}
|
|
|
|
preempt_enable();
|
|
#endif
|
|
return err;
|
|
}
|
|
/*
|
|
* Determine which stack to use..
|
|
*/
|
|
static inline abi_ulong
|
|
get_sigframe(struct target_sigaction *ka, CPUState *regs, size_t frame_size)
|
|
{
|
|
unsigned long sp;
|
|
|
|
/* Default to using normal stack */
|
|
sp = regs->active_tc.gpr[29];
|
|
|
|
/*
|
|
* FPU emulator may have it's own trampoline active just
|
|
* above the user stack, 16-bytes before the next lowest
|
|
* 16 byte boundary. Try to avoid trashing it.
|
|
*/
|
|
sp -= 32;
|
|
|
|
/* This is the X/Open sanctioned signal stack switching. */
|
|
if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
|
|
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
|
|
}
|
|
|
|
return (sp - frame_size) & ~7;
|
|
}
|
|
|
|
/* compare linux/arch/mips/kernel/signal.c:setup_frame() */
|
|
static void setup_frame(int sig, struct target_sigaction * ka,
|
|
target_sigset_t *set, CPUState *regs)
|
|
{
|
|
struct sigframe *frame;
|
|
abi_ulong frame_addr;
|
|
int i;
|
|
|
|
frame_addr = get_sigframe(ka, regs, sizeof(*frame));
|
|
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
|
|
goto give_sigsegv;
|
|
|
|
install_sigtramp(frame->sf_code, TARGET_NR_sigreturn);
|
|
|
|
if(setup_sigcontext(regs, &frame->sf_sc))
|
|
goto give_sigsegv;
|
|
|
|
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
|
|
if(__put_user(set->sig[i], &frame->sf_mask.sig[i]))
|
|
goto give_sigsegv;
|
|
}
|
|
|
|
/*
|
|
* Arguments to signal handler:
|
|
*
|
|
* a0 = signal number
|
|
* a1 = 0 (should be cause)
|
|
* a2 = pointer to struct sigcontext
|
|
*
|
|
* $25 and PC point to the signal handler, $29 points to the
|
|
* struct sigframe.
|
|
*/
|
|
regs->active_tc.gpr[ 4] = sig;
|
|
regs->active_tc.gpr[ 5] = 0;
|
|
regs->active_tc.gpr[ 6] = frame_addr + offsetof(struct sigframe, sf_sc);
|
|
regs->active_tc.gpr[29] = frame_addr;
|
|
regs->active_tc.gpr[31] = frame_addr + offsetof(struct sigframe, sf_code);
|
|
/* The original kernel code sets CP0_EPC to the handler
|
|
* since it returns to userland using eret
|
|
* we cannot do this here, and we must set PC directly */
|
|
regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler;
|
|
unlock_user_struct(frame, frame_addr, 1);
|
|
return;
|
|
|
|
give_sigsegv:
|
|
unlock_user_struct(frame, frame_addr, 1);
|
|
force_sig(TARGET_SIGSEGV/*, current*/);
|
|
return;
|
|
}
|
|
|
|
long do_sigreturn(CPUState *regs)
|
|
{
|
|
struct sigframe *frame;
|
|
abi_ulong frame_addr;
|
|
sigset_t blocked;
|
|
target_sigset_t target_set;
|
|
int i;
|
|
|
|
#if defined(DEBUG_SIGNAL)
|
|
fprintf(stderr, "do_sigreturn\n");
|
|
#endif
|
|
frame_addr = regs->active_tc.gpr[29];
|
|
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
|
|
goto badframe;
|
|
|
|
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
|
|
if(__get_user(target_set.sig[i], &frame->sf_mask.sig[i]))
|
|
goto badframe;
|
|
}
|
|
|
|
target_to_host_sigset_internal(&blocked, &target_set);
|
|
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
|
|
|
if (restore_sigcontext(regs, &frame->sf_sc))
|
|
goto badframe;
|
|
|
|
#if 0
|
|
/*
|
|
* Don't let your children do this ...
|
|
*/
|
|
__asm__ __volatile__(
|
|
"move\t$29, %0\n\t"
|
|
"j\tsyscall_exit"
|
|
:/* no outputs */
|
|
:"r" (®s));
|
|
/* Unreached */
|
|
#endif
|
|
|
|
regs->active_tc.PC = regs->CP0_EPC;
|
|
/* I am not sure this is right, but it seems to work
|
|
* maybe a problem with nested signals ? */
|
|
regs->CP0_EPC = 0;
|
|
return -TARGET_QEMU_ESIGRETURN;
|
|
|
|
badframe:
|
|
force_sig(TARGET_SIGSEGV/*, current*/);
|
|
return 0;
|
|
}
|
|
|
|
static void setup_rt_frame(int sig, struct target_sigaction *ka,
|
|
target_siginfo_t *info,
|
|
target_sigset_t *set, CPUState *env)
|
|
{
|
|
struct target_rt_sigframe *frame;
|
|
abi_ulong frame_addr;
|
|
int i;
|
|
|
|
frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
|
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
|
|
goto give_sigsegv;
|
|
|
|
install_sigtramp(frame->rs_code, TARGET_NR_rt_sigreturn);
|
|
|
|
copy_siginfo_to_user(&frame->rs_info, info);
|
|
|
|
__put_user(0, &frame->rs_uc.uc_flags);
|
|
__put_user(0, &frame->rs_uc.uc_link);
|
|
__put_user(target_sigaltstack_used.ss_sp, &frame->rs_uc.uc_stack.ss_sp);
|
|
__put_user(target_sigaltstack_used.ss_size, &frame->rs_uc.uc_stack.ss_size);
|
|
__put_user(sas_ss_flags(get_sp_from_cpustate(env)),
|
|
&frame->rs_uc.uc_stack.ss_flags);
|
|
|
|
setup_sigcontext(env, &frame->rs_uc.uc_mcontext);
|
|
|
|
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
|
|
__put_user(set->sig[i], &frame->rs_uc.uc_sigmask.sig[i]);
|
|
}
|
|
|
|
/*
|
|
* Arguments to signal handler:
|
|
*
|
|
* a0 = signal number
|
|
* a1 = pointer to struct siginfo
|
|
* a2 = pointer to struct ucontext
|
|
*
|
|
* $25 and PC point to the signal handler, $29 points to the
|
|
* struct sigframe.
|
|
*/
|
|
env->active_tc.gpr[ 4] = sig;
|
|
env->active_tc.gpr[ 5] = frame_addr
|
|
+ offsetof(struct target_rt_sigframe, rs_info);
|
|
env->active_tc.gpr[ 6] = frame_addr
|
|
+ offsetof(struct target_rt_sigframe, rs_uc);
|
|
env->active_tc.gpr[29] = frame_addr;
|
|
env->active_tc.gpr[31] = frame_addr
|
|
+ offsetof(struct target_rt_sigframe, rs_code);
|
|
/* The original kernel code sets CP0_EPC to the handler
|
|
* since it returns to userland using eret
|
|
* we cannot do this here, and we must set PC directly */
|
|
env->active_tc.PC = env->active_tc.gpr[25] = ka->_sa_handler;
|
|
unlock_user_struct(frame, frame_addr, 1);
|
|
return;
|
|
|
|
give_sigsegv:
|
|
unlock_user_struct(frame, frame_addr, 1);
|
|
force_sig(TARGET_SIGSEGV/*, current*/);
|
|
return;
|
|
}
|
|
|
|
long do_rt_sigreturn(CPUState *env)
|
|
{
|
|
struct target_rt_sigframe *frame;
|
|
abi_ulong frame_addr;
|
|
sigset_t blocked;
|
|
|
|
#if defined(DEBUG_SIGNAL)
|
|
fprintf(stderr, "do_rt_sigreturn\n");
|
|
#endif
|
|
frame_addr = env->active_tc.gpr[29];
|
|
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
|
|
goto badframe;
|
|
|
|
target_to_host_sigset(&blocked, &frame->rs_uc.uc_sigmask);
|
|
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
|
|
|
if (restore_sigcontext(env, &frame->rs_uc.uc_mcontext))
|
|
goto badframe;
|
|
|
|
if (do_sigaltstack(frame_addr +
|
|
offsetof(struct target_rt_sigframe, rs_uc.uc_stack),
|
|
0, get_sp_from_cpustate(env)) == -EFAULT)
|
|
goto badframe;
|
|
|
|
env->active_tc.PC = env->CP0_EPC;
|
|
/* I am not sure this is right, but it seems to work
|
|
* maybe a problem with nested signals ? */
|
|
env->CP0_EPC = 0;
|
|
return -TARGET_QEMU_ESIGRETURN;
|
|
|
|
badframe:
|
|
force_sig(TARGET_SIGSEGV/*, current*/);
|
|
return 0;
|
|
}
|
|
|
|
#elif defined(TARGET_SH4)
|
|
|
|
/*
|
|
* code and data structures from linux kernel:
|
|
* include/asm-sh/sigcontext.h
|
|
* arch/sh/kernel/signal.c
|
|
*/
|
|
|
|
struct target_sigcontext {
|
|
target_ulong oldmask;
|
|
|
|
/* CPU registers */
|
|
target_ulong sc_gregs[16];
|
|
target_ulong sc_pc;
|
|
target_ulong sc_pr;
|
|
target_ulong sc_sr;
|
|
target_ulong sc_gbr;
|
|
target_ulong sc_mach;
|
|
target_ulong sc_macl;
|
|
|
|
/* FPU registers */
|
|
target_ulong sc_fpregs[16];
|
|
target_ulong sc_xfpregs[16];
|
|
unsigned int sc_fpscr;
|
|
unsigned int sc_fpul;
|
|
unsigned int sc_ownedfp;
|
|
};
|
|
|
|
struct target_sigframe
|
|
{
|
|
struct target_sigcontext sc;
|
|
target_ulong extramask[TARGET_NSIG_WORDS-1];
|
|
uint16_t retcode[3];
|
|
};
|
|
|
|
|
|
struct target_ucontext {
|
|
target_ulong uc_flags;
|
|
struct target_ucontext *uc_link;
|
|
target_stack_t uc_stack;
|
|
struct target_sigcontext uc_mcontext;
|
|
target_sigset_t uc_sigmask; /* mask last for extensibility */
|
|
};
|
|
|
|
struct target_rt_sigframe
|
|
{
|
|
struct target_siginfo info;
|
|
struct target_ucontext uc;
|
|
uint16_t retcode[3];
|
|
};
|
|
|
|
|
|
#define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */
|
|
#define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */
|
|
|
|
static abi_ulong get_sigframe(struct target_sigaction *ka,
|
|
unsigned long sp, size_t frame_size)
|
|
{
|
|
if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) {
|
|
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
|
|
}
|
|
|
|
return (sp - frame_size) & -8ul;
|
|
}
|
|
|
|
static int setup_sigcontext(struct target_sigcontext *sc,
|
|
CPUState *regs, unsigned long mask)
|
|
{
|
|
int err = 0;
|
|
|
|
#define COPY(x) err |= __put_user(regs->x, &sc->sc_##x)
|
|
COPY(gregs[0]); COPY(gregs[1]);
|
|
COPY(gregs[2]); COPY(gregs[3]);
|
|
COPY(gregs[4]); COPY(gregs[5]);
|
|
COPY(gregs[6]); COPY(gregs[7]);
|
|
COPY(gregs[8]); COPY(gregs[9]);
|
|
COPY(gregs[10]); COPY(gregs[11]);
|
|
COPY(gregs[12]); COPY(gregs[13]);
|
|
COPY(gregs[14]); COPY(gregs[15]);
|
|
COPY(gbr); COPY(mach);
|
|
COPY(macl); COPY(pr);
|
|
COPY(sr); COPY(pc);
|
|
#undef COPY
|
|
|
|
/* todo: save FPU registers here */
|
|
|
|
/* non-iBCS2 extensions.. */
|
|
err |= __put_user(mask, &sc->oldmask);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int restore_sigcontext(CPUState *regs,
|
|
struct target_sigcontext *sc)
|
|
{
|
|
unsigned int err = 0;
|
|
|
|
#define COPY(x) err |= __get_user(regs->x, &sc->sc_##x)
|
|
COPY(gregs[1]);
|
|
COPY(gregs[2]); COPY(gregs[3]);
|
|
COPY(gregs[4]); COPY(gregs[5]);
|
|
COPY(gregs[6]); COPY(gregs[7]);
|
|
COPY(gregs[8]); COPY(gregs[9]);
|
|
COPY(gregs[10]); COPY(gregs[11]);
|
|
COPY(gregs[12]); COPY(gregs[13]);
|
|
COPY(gregs[14]); COPY(gregs[15]);
|
|
COPY(gbr); COPY(mach);
|
|
COPY(macl); COPY(pr);
|
|
COPY(sr); COPY(pc);
|
|
#undef COPY
|
|
|
|
/* todo: restore FPU registers here */
|
|
|
|
regs->tra = -1; /* disable syscall checks */
|
|
return err;
|
|
}
|
|
|
|
static void setup_frame(int sig, struct target_sigaction *ka,
|
|
target_sigset_t *set, CPUState *regs)
|
|
{
|
|
struct target_sigframe *frame;
|
|
abi_ulong frame_addr;
|
|
int i;
|
|
int err = 0;
|
|
int signal;
|
|
|
|
frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
|
|
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
|
|
goto give_sigsegv;
|
|
|
|
signal = current_exec_domain_sig(sig);
|
|
|
|
err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);
|
|
|
|
for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
|
|
err |= __put_user(set->sig[i + 1], &frame->extramask[i]);
|
|
}
|
|
|
|
/* Set up to return from userspace. If provided, use a stub
|
|
already in userspace. */
|
|
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
|
regs->pr = (unsigned long) ka->sa_restorer;
|
|
} else {
|
|
/* Generate return code (system call to sigreturn) */
|
|
err |= __put_user(MOVW(2), &frame->retcode[0]);
|
|
err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
|
|
err |= __put_user((TARGET_NR_sigreturn), &frame->retcode[2]);
|
|
regs->pr = (unsigned long) frame->retcode;
|
|
}
|
|
|
|
if (err)
|
|
goto give_sigsegv;
|
|
|
|
/* Set up registers for signal handler */
|
|
regs->gregs[15] = (unsigned long) frame;
|
|
regs->gregs[4] = signal; /* Arg for signal handler */
|
|
regs->gregs[5] = 0;
|
|
regs->gregs[6] = (unsigned long) &frame->sc;
|
|
regs->pc = (unsigned long) ka->_sa_handler;
|
|
|
|
unlock_user_struct(frame, frame_addr, 1);
|
|
return;
|
|
|
|
give_sigsegv:
|
|
unlock_user_struct(frame, frame_addr, 1);
|
|
force_sig(SIGSEGV);
|
|
}
|
|
|
|
static void setup_rt_frame(int sig, struct target_sigaction *ka,
|
|
target_siginfo_t *info,
|
|
target_sigset_t *set, CPUState *regs)
|
|
{
|
|
struct target_rt_sigframe *frame;
|
|
abi_ulong frame_addr;
|
|
int i;
|
|
int err = 0;
|
|
int signal;
|
|
|
|
frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
|
|
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
|
|
goto give_sigsegv;
|
|
|
|
signal = current_exec_domain_sig(sig);
|
|
|
|
err |= copy_siginfo_to_user(&frame->info, info);
|
|
|
|
/* Create the ucontext. */
|
|
err |= __put_user(0, &frame->uc.uc_flags);
|
|
err |= __put_user(0, (unsigned long *)&frame->uc.uc_link);
|
|
err |= __put_user((unsigned long)target_sigaltstack_used.ss_sp,
|
|
&frame->uc.uc_stack.ss_sp);
|
|
err |= __put_user(sas_ss_flags(regs->gregs[15]),
|
|
&frame->uc.uc_stack.ss_flags);
|
|
err |= __put_user(target_sigaltstack_used.ss_size,
|
|
&frame->uc.uc_stack.ss_size);
|
|
err |= setup_sigcontext(&frame->uc.uc_mcontext,
|
|
regs, set->sig[0]);
|
|
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
|
|
err |= __put_user(set->sig[i], &frame->uc.uc_sigmask.sig[i]);
|
|
}
|
|
|
|
/* Set up to return from userspace. If provided, use a stub
|
|
already in userspace. */
|
|
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
|
regs->pr = (unsigned long) ka->sa_restorer;
|
|
} else {
|
|
/* Generate return code (system call to sigreturn) */
|
|
err |= __put_user(MOVW(2), &frame->retcode[0]);
|
|
err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
|
|
err |= __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]);
|
|
regs->pr = (unsigned long) frame->retcode;
|
|
}
|
|
|
|
if (err)
|
|
goto give_sigsegv;
|
|
|
|
/* Set up registers for signal handler */
|
|
regs->gregs[15] = (unsigned long) frame;
|
|
regs->gregs[4] = signal; /* Arg for signal handler */
|
|
regs->gregs[5] = (unsigned long) &frame->info;
|
|
regs->gregs[6] = (unsigned long) &frame->uc;
|
|
regs->pc = (unsigned long) ka->_sa_handler;
|
|
|
|
unlock_user_struct(frame, frame_addr, 1);
|
|
return;
|
|
|
|
give_sigsegv:
|
|
unlock_user_struct(frame, frame_addr, 1);
|
|
force_sig(SIGSEGV);
|
|
}
|
|
|
|
long do_sigreturn(CPUState *regs)
|
|
{
|
|
struct target_sigframe *frame;
|
|
abi_ulong frame_addr;
|
|
sigset_t blocked;
|
|
target_sigset_t target_set;
|
|
int i;
|
|
int err = 0;
|
|
|
|
#if defined(DEBUG_SIGNAL)
|
|
fprintf(stderr, "do_sigreturn\n");
|
|
#endif
|
|
frame_addr = regs->gregs[15];
|
|
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
|
|
goto badframe;
|
|
|
|
err |= __get_user(target_set.sig[0], &frame->sc.oldmask);
|
|
for(i = 1; i < TARGET_NSIG_WORDS; i++) {
|
|
err |= (__get_user(target_set.sig[i], &frame->extramask[i - 1]));
|
|
}
|
|
|
|
if (err)
|
|
goto badframe;
|
|
|
|
target_to_host_sigset_internal(&blocked, &target_set);
|
|
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
|
|
|
if (restore_sigcontext(regs, &frame->sc))
|
|
goto badframe;
|
|
|
|
unlock_user_struct(frame, frame_addr, 0);
|
|
return regs->gregs[0];
|
|
|
|
badframe:
|
|
unlock_user_struct(frame, frame_addr, 0);
|
|
force_sig(TARGET_SIGSEGV);
|
|
return 0;
|
|
}
|
|
|
|
long do_rt_sigreturn(CPUState *regs)
|
|
{
|
|
struct target_rt_sigframe *frame;
|
|
abi_ulong frame_addr;
|
|
sigset_t blocked;
|
|
|
|
#if defined(DEBUG_SIGNAL)
|
|
fprintf(stderr, "do_rt_sigreturn\n");
|
|
#endif
|
|
frame_addr = regs->gregs[15];
|
|
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
|
|
goto badframe;
|
|
|
|
target_to_host_sigset(&blocked, &frame->uc.uc_sigmask);
|
|
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
|
|
|
if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
|
|
goto badframe;
|
|
|
|
if (do_sigaltstack(frame_addr +
|
|
offsetof(struct target_rt_sigframe, uc.uc_stack),
|
|
0, get_sp_from_cpustate(regs)) == -EFAULT)
|
|
goto badframe;
|
|
|
|
unlock_user_struct(frame, frame_addr, 0);
|
|
return regs->gregs[0];
|
|
|
|
badframe:
|
|
unlock_user_struct(frame, frame_addr, 0);
|
|
force_sig(TARGET_SIGSEGV);
|
|
return 0;
|
|
}
|
|
#elif defined(TARGET_CRIS)
|
|
|
|
struct target_sigcontext {
|
|
struct target_pt_regs regs; /* needs to be first */
|
|
uint32_t oldmask;
|
|
uint32_t usp; /* usp before stacking this gunk on it */
|
|
};
|
|
|
|
/* Signal frames. */
|
|
struct target_signal_frame {
|
|
struct target_sigcontext sc;
|
|
uint32_t extramask[TARGET_NSIG_WORDS - 1];
|
|
uint8_t retcode[8]; /* Trampoline code. */
|
|
};
|
|
|
|
struct rt_signal_frame {
|
|
struct siginfo *pinfo;
|
|
void *puc;
|
|
struct siginfo info;
|
|
struct ucontext uc;
|
|
uint8_t retcode[8]; /* Trampoline code. */
|
|
};
|
|
|
|
static void setup_sigcontext(struct target_sigcontext *sc, CPUState *env)
|
|
{
|
|
__put_user(env->regs[0], &sc->regs.r0);
|
|
__put_user(env->regs[1], &sc->regs.r1);
|
|
__put_user(env->regs[2], &sc->regs.r2);
|
|
__put_user(env->regs[3], &sc->regs.r3);
|
|
__put_user(env->regs[4], &sc->regs.r4);
|
|
__put_user(env->regs[5], &sc->regs.r5);
|
|
__put_user(env->regs[6], &sc->regs.r6);
|
|
__put_user(env->regs[7], &sc->regs.r7);
|
|
__put_user(env->regs[8], &sc->regs.r8);
|
|
__put_user(env->regs[9], &sc->regs.r9);
|
|
__put_user(env->regs[10], &sc->regs.r10);
|
|
__put_user(env->regs[11], &sc->regs.r11);
|
|
__put_user(env->regs[12], &sc->regs.r12);
|
|
__put_user(env->regs[13], &sc->regs.r13);
|
|
__put_user(env->regs[14], &sc->usp);
|
|
__put_user(env->regs[15], &sc->regs.acr);
|
|
__put_user(env->pregs[PR_MOF], &sc->regs.mof);
|
|
__put_user(env->pregs[PR_SRP], &sc->regs.srp);
|
|
__put_user(env->pc, &sc->regs.erp);
|
|
}
|
|
|
|
static void restore_sigcontext(struct target_sigcontext *sc, CPUState *env)
|
|
{
|
|
__get_user(env->regs[0], &sc->regs.r0);
|
|
__get_user(env->regs[1], &sc->regs.r1);
|
|
__get_user(env->regs[2], &sc->regs.r2);
|
|
__get_user(env->regs[3], &sc->regs.r3);
|
|
__get_user(env->regs[4], &sc->regs.r4);
|
|
__get_user(env->regs[5], &sc->regs.r5);
|
|
__get_user(env->regs[6], &sc->regs.r6);
|
|
__get_user(env->regs[7], &sc->regs.r7);
|
|
__get_user(env->regs[8], &sc->regs.r8);
|
|
__get_user(env->regs[9], &sc->regs.r9);
|
|
__get_user(env->regs[10], &sc->regs.r10);
|
|
__get_user(env->regs[11], &sc->regs.r11);
|
|
__get_user(env->regs[12], &sc->regs.r12);
|
|
__get_user(env->regs[13], &sc->regs.r13);
|
|
__get_user(env->regs[14], &sc->usp);
|
|
__get_user(env->regs[15], &sc->regs.acr);
|
|
__get_user(env->pregs[PR_MOF], &sc->regs.mof);
|
|
__get_user(env->pregs[PR_SRP], &sc->regs.srp);
|
|
__get_user(env->pc, &sc->regs.erp);
|
|
}
|
|
|
|
static abi_ulong get_sigframe(CPUState *env, int framesize)
|
|
{
|
|
abi_ulong sp;
|
|
/* Align the stack downwards to 4. */
|
|
sp = (env->regs[R_SP] & ~3);
|
|
return sp - framesize;
|
|
}
|
|
|
|
static void setup_frame(int sig, struct target_sigaction *ka,
|
|
target_sigset_t *set, CPUState *env)
|
|
{
|
|
struct target_signal_frame *frame;
|
|
abi_ulong frame_addr;
|
|
int err = 0;
|
|
int i;
|
|
|
|
frame_addr = get_sigframe(env, sizeof *frame);
|
|
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
|
|
goto badframe;
|
|
|
|
/*
|
|
* The CRIS signal return trampoline. A real linux/CRIS kernel doesn't
|
|
* use this trampoline anymore but it sets it up for GDB.
|
|
* In QEMU, using the trampoline simplifies things a bit so we use it.
|
|
*
|
|
* This is movu.w __NR_sigreturn, r9; break 13;
|
|
*/
|
|
err |= __put_user(0x9c5f, frame->retcode+0);
|
|
err |= __put_user(TARGET_NR_sigreturn,
|
|
frame->retcode+2);
|
|
err |= __put_user(0xe93d, frame->retcode+4);
|
|
|
|
/* Save the mask. */
|
|
err |= __put_user(set->sig[0], &frame->sc.oldmask);
|
|
if (err)
|
|
goto badframe;
|
|
|
|
for(i = 1; i < TARGET_NSIG_WORDS; i++) {
|
|
if (__put_user(set->sig[i], &frame->extramask[i - 1]))
|
|
goto badframe;
|
|
}
|
|
|
|
setup_sigcontext(&frame->sc, env);
|
|
|
|
/* Move the stack and setup the arguments for the handler. */
|
|
env->regs[R_SP] = (uint32_t) (unsigned long) frame;
|
|
env->regs[10] = sig;
|
|
env->pc = (unsigned long) ka->_sa_handler;
|
|
/* Link SRP so the guest returns through the trampoline. */
|
|
env->pregs[PR_SRP] = (uint32_t) (unsigned long) &frame->retcode[0];
|
|
|
|
unlock_user_struct(frame, frame_addr, 1);
|
|
return;
|
|
badframe:
|
|
unlock_user_struct(frame, frame_addr, 1);
|
|
force_sig(TARGET_SIGSEGV);
|
|
}
|
|
|
|
static void setup_rt_frame(int sig, struct target_sigaction *ka,
|
|
target_siginfo_t *info,
|
|
target_sigset_t *set, CPUState *env)
|
|
{
|
|
fprintf(stderr, "CRIS setup_rt_frame: not implemented\n");
|
|
}
|
|
|
|
long do_sigreturn(CPUState *env)
|
|
{
|
|
struct target_signal_frame *frame;
|
|
abi_ulong frame_addr;
|
|
target_sigset_t target_set;
|
|
sigset_t set;
|
|
int i;
|
|
|
|
frame_addr = env->regs[R_SP];
|
|
/* Make sure the guest isn't playing games. */
|
|
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
|
|
goto badframe;
|
|
|
|
/* Restore blocked signals */
|
|
if (__get_user(target_set.sig[0], &frame->sc.oldmask))
|
|
goto badframe;
|
|
for(i = 1; i < TARGET_NSIG_WORDS; i++) {
|
|
if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
|
|
goto badframe;
|
|
}
|
|
target_to_host_sigset_internal(&set, &target_set);
|
|
sigprocmask(SIG_SETMASK, &set, NULL);
|
|
|
|
restore_sigcontext(&frame->sc, env);
|
|
unlock_user_struct(frame, frame_addr, 0);
|
|
return env->regs[10];
|
|
badframe:
|
|
unlock_user_struct(frame, frame_addr, 0);
|
|
force_sig(TARGET_SIGSEGV);
|
|
}
|
|
|
|
long do_rt_sigreturn(CPUState *env)
|
|
{
|
|
fprintf(stderr, "CRIS do_rt_sigreturn: not implemented\n");
|
|
return -TARGET_ENOSYS;
|
|
}
|
|
|
|
#else
|
|
|
|
static void setup_frame(int sig, struct target_sigaction *ka,
|
|
target_sigset_t *set, CPUState *env)
|
|
{
|
|
fprintf(stderr, "setup_frame: not implemented\n");
|
|
}
|
|
|
|
static void setup_rt_frame(int sig, struct target_sigaction *ka,
|
|
target_siginfo_t *info,
|
|
target_sigset_t *set, CPUState *env)
|
|
{
|
|
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
|
}
|
|
|
|
long do_sigreturn(CPUState *env)
|
|
{
|
|
fprintf(stderr, "do_sigreturn: not implemented\n");
|
|
return -TARGET_ENOSYS;
|
|
}
|
|
|
|
long do_rt_sigreturn(CPUState *env)
|
|
{
|
|
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
|
return -TARGET_ENOSYS;
|
|
}
|
|
|
|
#endif
|
|
|
|
void process_pending_signals(CPUState *cpu_env)
|
|
{
|
|
int sig;
|
|
abi_ulong handler;
|
|
sigset_t set, old_set;
|
|
target_sigset_t target_old_set;
|
|
struct emulated_sigtable *k;
|
|
struct target_sigaction *sa;
|
|
struct sigqueue *q;
|
|
TaskState *ts = cpu_env->opaque;
|
|
|
|
if (!ts->signal_pending)
|
|
return;
|
|
|
|
/* FIXME: This is not threadsafe. */
|
|
k = ts->sigtab;
|
|
for(sig = 1; sig <= TARGET_NSIG; sig++) {
|
|
if (k->pending)
|
|
goto handle_signal;
|
|
k++;
|
|
}
|
|
/* if no signal is pending, just return */
|
|
ts->signal_pending = 0;
|
|
return;
|
|
|
|
handle_signal:
|
|
#ifdef DEBUG_SIGNAL
|
|
fprintf(stderr, "qemu: process signal %d\n", sig);
|
|
#endif
|
|
/* dequeue signal */
|
|
q = k->first;
|
|
k->first = q->next;
|
|
if (!k->first)
|
|
k->pending = 0;
|
|
|
|
sig = gdb_handlesig (cpu_env, sig);
|
|
if (!sig) {
|
|
sa = NULL;
|
|
handler = TARGET_SIG_IGN;
|
|
} else {
|
|
sa = &sigact_table[sig - 1];
|
|
handler = sa->_sa_handler;
|
|
}
|
|
|
|
if (handler == TARGET_SIG_DFL) {
|
|
/* default handler : ignore some signal. The other are job control or fatal */
|
|
if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
|
|
kill(getpid(),SIGSTOP);
|
|
} else if (sig != TARGET_SIGCHLD &&
|
|
sig != TARGET_SIGURG &&
|
|
sig != TARGET_SIGWINCH &&
|
|
sig != TARGET_SIGCONT) {
|
|
force_sig(sig);
|
|
}
|
|
} else if (handler == TARGET_SIG_IGN) {
|
|
/* ignore sig */
|
|
} else if (handler == TARGET_SIG_ERR) {
|
|
force_sig(sig);
|
|
} else {
|
|
/* compute the blocked signals during the handler execution */
|
|
target_to_host_sigset(&set, &sa->sa_mask);
|
|
/* SA_NODEFER indicates that the current signal should not be
|
|
blocked during the handler */
|
|
if (!(sa->sa_flags & TARGET_SA_NODEFER))
|
|
sigaddset(&set, target_to_host_signal(sig));
|
|
|
|
/* block signals in the handler using Linux */
|
|
sigprocmask(SIG_BLOCK, &set, &old_set);
|
|
/* save the previous blocked signal state to restore it at the
|
|
end of the signal execution (see do_sigreturn) */
|
|
host_to_target_sigset_internal(&target_old_set, &old_set);
|
|
|
|
/* if the CPU is in VM86 mode, we restore the 32 bit values */
|
|
#if defined(TARGET_I386) && !defined(TARGET_X86_64)
|
|
{
|
|
CPUX86State *env = cpu_env;
|
|
if (env->eflags & VM_MASK)
|
|
save_v86_state(env);
|
|
}
|
|
#endif
|
|
/* prepare the stack frame of the virtual CPU */
|
|
if (sa->sa_flags & TARGET_SA_SIGINFO)
|
|
setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env);
|
|
else
|
|
setup_frame(sig, sa, &target_old_set, cpu_env);
|
|
if (sa->sa_flags & TARGET_SA_RESETHAND)
|
|
sa->_sa_handler = TARGET_SIG_DFL;
|
|
}
|
|
if (q != &k->info)
|
|
free_sigqueue(cpu_env, q);
|
|
}
|