#include "trace.h"
#include "signal-common.h"
#include "host-signal.h"
-#include "safe-syscall.h"
+#include "user/safe-syscall.h"
static struct target_sigaction sigact_table[TARGET_NSIG];
QEMU_BUILD_BUG_ON(__SIGRTMAX + 1 != _NSIG);
#endif
static uint8_t host_to_target_signal_table[_NSIG] = {
- [SIGHUP] = TARGET_SIGHUP,
- [SIGINT] = TARGET_SIGINT,
- [SIGQUIT] = TARGET_SIGQUIT,
- [SIGILL] = TARGET_SIGILL,
- [SIGTRAP] = TARGET_SIGTRAP,
- [SIGABRT] = TARGET_SIGABRT,
-/* [SIGIOT] = TARGET_SIGIOT,*/
- [SIGBUS] = TARGET_SIGBUS,
- [SIGFPE] = TARGET_SIGFPE,
- [SIGKILL] = TARGET_SIGKILL,
- [SIGUSR1] = TARGET_SIGUSR1,
- [SIGSEGV] = TARGET_SIGSEGV,
- [SIGUSR2] = TARGET_SIGUSR2,
- [SIGPIPE] = TARGET_SIGPIPE,
- [SIGALRM] = TARGET_SIGALRM,
- [SIGTERM] = TARGET_SIGTERM,
-#ifdef SIGSTKFLT
- [SIGSTKFLT] = TARGET_SIGSTKFLT,
-#endif
- [SIGCHLD] = TARGET_SIGCHLD,
- [SIGCONT] = TARGET_SIGCONT,
- [SIGSTOP] = TARGET_SIGSTOP,
- [SIGTSTP] = TARGET_SIGTSTP,
- [SIGTTIN] = TARGET_SIGTTIN,
- [SIGTTOU] = TARGET_SIGTTOU,
- [SIGURG] = TARGET_SIGURG,
- [SIGXCPU] = TARGET_SIGXCPU,
- [SIGXFSZ] = TARGET_SIGXFSZ,
- [SIGVTALRM] = TARGET_SIGVTALRM,
- [SIGPROF] = TARGET_SIGPROF,
- [SIGWINCH] = TARGET_SIGWINCH,
- [SIGIO] = TARGET_SIGIO,
- [SIGPWR] = TARGET_SIGPWR,
- [SIGSYS] = TARGET_SIGSYS,
+#define MAKE_SIG_ENTRY(sig) [sig] = TARGET_##sig,
+ MAKE_SIGNAL_LIST
+#undef MAKE_SIG_ENTRY
/* next signals stay the same */
};
/* Wrapper for sigprocmask function
* Emulates a sigprocmask in a safe way for the guest. Note that set and oldset
- * are host signal set, not guest ones. Returns -TARGET_ERESTARTSYS if
+ * are host signal set, not guest ones. Returns -QEMU_ERESTARTSYS if
* a signal was already pending and the syscall must be restarted, or
* 0 on success.
* If set is NULL, this is guaranteed not to fail.
int i;
if (block_signals()) {
- return -TARGET_ERESTARTSYS;
+ return -QEMU_ERESTARTSYS;
}
switch (how) {
return 0;
}
-#if !defined(TARGET_NIOS2)
/* Just set the guest's signal mask to the specified value; the
* caller is assumed to have called block_signals() already.
*/
ts->signal_mask = *set;
}
-#endif
/* sigaltstack management */
case TARGET_SIGCHLD:
tinfo->_sifields._sigchld._pid = info->si_pid;
tinfo->_sifields._sigchld._uid = info->si_uid;
- tinfo->_sifields._sigchld._status = info->si_status;
+ if (si_code == CLD_EXITED)
+ tinfo->_sifields._sigchld._status = info->si_status;
+ else
+ tinfo->_sifields._sigchld._status
+ = host_to_target_signal(info->si_status & 0x7f)
+ | (info->si_status & ~0x7f);
tinfo->_sifields._sigchld._utime = info->si_utime;
tinfo->_sifields._sigchld._stime = info->si_stime;
si_type = QEMU_SI_CHLD;
}
/* abort execution with signal */
-static void QEMU_NORETURN dump_core_and_abort(int target_sig)
+static G_NORETURN
+void dump_core_and_abort(int target_sig)
{
CPUState *cpu = thread_cpu;
CPUArchState *env = cpu->env_ptr;
struct sigaction act;
host_sig = target_to_host_signal(target_sig);
- trace_user_force_sig(env, target_sig, host_sig);
+ trace_user_dump_core_and_abort(env, target_sig, host_sig);
gdb_signalled(env, target_sig);
/* dump core if supported by target binary format */
/* queue a signal so that it will be send to the virtual CPU as soon
as possible */
-int queue_signal(CPUArchState *env, int sig, int si_type,
- target_siginfo_t *info)
+void queue_signal(CPUArchState *env, int sig, int si_type,
+ target_siginfo_t *info)
{
CPUState *cpu = env_cpu(env);
TaskState *ts = cpu->opaque;
ts->sync_signal.pending = sig;
/* signal that a new signal is pending */
qatomic_set(&ts->signal_pending, 1);
- return 1; /* indicates that the signal was queued */
}
/* Adjust the signal context to rewind out of safe-syscall if we're in it */
static inline void rewind_if_in_safe_syscall(void *puc)
{
-#ifdef HAVE_SAFE_SYSCALL
- ucontext_t *uc = (ucontext_t *)puc;
+ host_sigcontext *uc = (host_sigcontext *)puc;
uintptr_t pcreg = host_signal_pc(uc);
if (pcreg > (uintptr_t)safe_syscall_start
&& pcreg < (uintptr_t)safe_syscall_end) {
host_signal_set_pc(uc, (uintptr_t)safe_syscall_start);
}
-#endif
}
static void host_signal_handler(int host_sig, siginfo_t *info, void *puc)
CPUState *cpu = env_cpu(env);
TaskState *ts = cpu->opaque;
target_siginfo_t tinfo;
- ucontext_t *uc = puc;
+ host_sigcontext *uc = puc;
struct emulated_sigtable *k;
int guest_sig;
uintptr_t pc = 0;
bool sync_sig = false;
+ void *sigmask = host_signal_mask(uc);
/*
* Non-spoofed SIGSEGV and SIGBUS are synchronous, and need special
if (info->si_code == SEGV_ACCERR && h2g_valid(host_addr)) {
/* If this was a write to a TB protected page, restart. */
if (is_write &&
- handle_sigsegv_accerr_write(cpu, &uc->uc_sigmask,
- pc, guest_addr)) {
+ handle_sigsegv_accerr_write(cpu, sigmask, pc, guest_addr)) {
return;
}
}
}
- sigprocmask(SIG_SETMASK, &uc->uc_sigmask, NULL);
+ sigprocmask(SIG_SETMASK, sigmask, NULL);
cpu_loop_exit_sigsegv(cpu, guest_addr, access_type, maperr, pc);
} else {
- sigprocmask(SIG_SETMASK, &uc->uc_sigmask, NULL);
+ sigprocmask(SIG_SETMASK, sigmask, NULL);
if (info->si_code == BUS_ADRALN) {
cpu_loop_exit_sigbus(cpu, guest_addr, access_type, pc);
}
* now and it getting out to the main loop. Signals will be
* unblocked again in process_pending_signals().
*
- * WARNING: we cannot use sigfillset() here because the uc_sigmask
+ * WARNING: we cannot use sigfillset() here because the sigmask
* field is a kernel sigset_t, which is much smaller than the
* libc sigset_t which sigfillset() operates on. Using sigfillset()
* would write 0xff bytes off the end of the structure and trash
* data on the struct.
- * We can't use sizeof(uc->uc_sigmask) either, because the libc
- * headers define the struct field with the wrong (too large) type.
*/
- memset(&uc->uc_sigmask, 0xff, SIGSET_T_SIZE);
- sigdelset(&uc->uc_sigmask, SIGSEGV);
- sigdelset(&uc->uc_sigmask, SIGBUS);
+ memset(sigmask, 0xff, SIGSET_T_SIZE);
+ sigdelset(sigmask, SIGSEGV);
+ sigdelset(sigmask, SIGBUS);
/* interrupt the virtual CPU as soon as possible */
cpu_exit(thread_cpu);
}
if (block_signals()) {
- return -TARGET_ERESTARTSYS;
+ return -QEMU_ERESTARTSYS;
}
k = &sigact_table[sig - 1];
oact->sa_mask = k->sa_mask;
}
if (act) {
- /* FIXME: This is not threadsafe. */
__get_user(k->_sa_handler, &act->_sa_handler);
__get_user(k->sa_flags, &act->sa_flags);
#ifdef TARGET_ARCH_HAS_SA_RESTORER
sigset_t *blocked_set;
while (qatomic_read(&ts->signal_pending)) {
- /* FIXME: This is not threadsafe. */
sigfillset(&set);
sigprocmask(SIG_SETMASK, &set, 0);
}
ts->in_sigsuspend = 0;
}
+
+int process_sigsuspend_mask(sigset_t **pset, target_ulong sigset,
+ target_ulong sigsize)
+{
+ TaskState *ts = (TaskState *)thread_cpu->opaque;
+ sigset_t *host_set = &ts->sigsuspend_mask;
+ target_sigset_t *target_sigset;
+
+ if (sigsize != sizeof(*target_sigset)) {
+ /* Like the kernel, we enforce correct size sigsets */
+ return -TARGET_EINVAL;
+ }
+
+ target_sigset = lock_user(VERIFY_READ, sigset, sigsize, 1);
+ if (!target_sigset) {
+ return -TARGET_EFAULT;
+ }
+ target_to_host_sigset(host_set, target_sigset);
+ unlock_user(target_sigset, sigset, 0);
+
+ *pset = host_set;
+ return 0;
+}
projects / qemu.git / blobdiff