/*
* Emulation of Linux signals
- *
+ *
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
#include <errno.h>
#include <sys/ucontext.h>
-#ifdef __ia64__
-#undef uc_mcontext
-#undef uc_sigmask
-#undef uc_stack
-#undef uc_link
-#endif
-
+#include "target_signal.h"
#include "qemu.h"
//#define DEBUG_SIGNAL
first signal, we put it here */
};
+struct target_sigaltstack target_sigaltstack_used = {
+ .ss_sp = 0,
+ .ss_size = 0,
+ .ss_flags = TARGET_SS_DISABLE,
+};
+
static struct emulated_sigaction sigact_table[TARGET_NSIG];
static struct sigqueue sigqueue_table[MAX_SIGQUEUE_SIZE]; /* siginfo queue */
static struct sigqueue *first_free; /* first free siginfo queue entry */
static int signal_pending; /* non zero if a signal may be pending */
-static void host_signal_handler(int host_signum, siginfo_t *info,
+static void host_signal_handler(int host_signum, siginfo_t *info,
void *puc);
-/* XXX: do it properly */
+static uint8_t host_to_target_signal_table[65] = {
+ [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,
+ /* next signals stay the same */
+};
+static uint8_t target_to_host_signal_table[65];
+
+static inline int on_sig_stack(unsigned long sp)
+{
+ return (sp - target_sigaltstack_used.ss_sp
+ < target_sigaltstack_used.ss_size);
+}
+
+static inline int sas_ss_flags(unsigned long sp)
+{
+ return (target_sigaltstack_used.ss_size == 0 ? SS_DISABLE
+ : on_sig_stack(sp) ? SS_ONSTACK : 0);
+}
+
static inline int host_to_target_signal(int sig)
{
- return sig;
+ return host_to_target_signal_table[sig];
}
static inline int target_to_host_signal(int sig)
{
- return sig;
+ return target_to_host_signal_table[sig];
}
-void host_to_target_sigset(target_sigset_t *d, sigset_t *s)
+static void host_to_target_sigset_internal(target_sigset_t *d,
+ const sigset_t *s)
{
int i;
- for(i = 0;i < TARGET_NSIG_WORDS; i++) {
- d->sig[i] = tswapl(((unsigned long *)s)[i]);
+ unsigned long sigmask;
+ uint32_t target_sigmask;
+
+ sigmask = ((unsigned long *)s)[0];
+ target_sigmask = 0;
+ for(i = 0; i < 32; i++) {
+ if (sigmask & (1 << i))
+ target_sigmask |= 1 << (host_to_target_signal(i + 1) - 1);
+ }
+#if TARGET_LONG_BITS == 32 && HOST_LONG_BITS == 32
+ d->sig[0] = target_sigmask;
+ for(i = 1;i < TARGET_NSIG_WORDS; i++) {
+ d->sig[i] = ((unsigned long *)s)[i];
}
+#elif TARGET_LONG_BITS == 32 && HOST_LONG_BITS == 64 && TARGET_NSIG_WORDS == 2
+ d->sig[0] = target_sigmask;
+ d->sig[1] = sigmask >> 32;
+#else
+#warning host_to_target_sigset
+#endif
}
-void target_to_host_sigset(sigset_t *d, target_sigset_t *s)
+void host_to_target_sigset(target_sigset_t *d, const sigset_t *s)
{
+ target_sigset_t d1;
int i;
- for(i = 0;i < TARGET_NSIG_WORDS; i++) {
- ((unsigned long *)d)[i] = tswapl(s->sig[i]);
+
+ host_to_target_sigset_internal(&d1, s);
+ for(i = 0;i < TARGET_NSIG_WORDS; i++)
+ d->sig[i] = tswapl(d1.sig[i]);
+}
+
+void target_to_host_sigset_internal(sigset_t *d, const target_sigset_t *s)
+{
+ int i;
+ unsigned long sigmask;
+ target_ulong target_sigmask;
+
+ target_sigmask = s->sig[0];
+ sigmask = 0;
+ for(i = 0; i < 32; i++) {
+ if (target_sigmask & (1 << i))
+ sigmask |= 1 << (target_to_host_signal(i + 1) - 1);
+ }
+#if TARGET_LONG_BITS == 32 && HOST_LONG_BITS == 32
+ ((unsigned long *)d)[0] = sigmask;
+ for(i = 1;i < TARGET_NSIG_WORDS; i++) {
+ ((unsigned long *)d)[i] = s->sig[i];
}
+#elif TARGET_LONG_BITS == 32 && HOST_LONG_BITS == 64 && TARGET_NSIG_WORDS == 2
+ ((unsigned long *)d)[0] = sigmask | ((unsigned long)(s->sig[1]) << 32);
+#else
+#warning target_to_host_sigset
+#endif /* TARGET_LONG_BITS */
+}
+
+void target_to_host_sigset(sigset_t *d, const target_sigset_t *s)
+{
+ target_sigset_t s1;
+ int i;
+
+ for(i = 0;i < TARGET_NSIG_WORDS; i++)
+ s1.sig[i] = tswapl(s->sig[i]);
+ target_to_host_sigset_internal(d, &s1);
}
-void host_to_target_old_sigset(target_ulong *old_sigset,
+void host_to_target_old_sigset(target_ulong *old_sigset,
const sigset_t *sigset)
{
- *old_sigset = tswap32(*(unsigned long *)sigset & 0xffffffff);
+ target_sigset_t d;
+ host_to_target_sigset(&d, sigset);
+ *old_sigset = d.sig[0];
}
-void target_to_host_old_sigset(sigset_t *sigset,
+void target_to_host_old_sigset(sigset_t *sigset,
const target_ulong *old_sigset)
{
- sigemptyset(sigset);
- *(unsigned long *)sigset = tswapl(*old_sigset);
+ target_sigset_t d;
+ int i;
+
+ d.sig[0] = *old_sigset;
+ for(i = 1;i < TARGET_NSIG_WORDS; i++)
+ d.sig[i] = 0;
+ target_to_host_sigset(sigset, &d);
}
/* siginfo conversion */
-static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo,
+static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo,
const siginfo_t *info)
{
int sig;
tinfo->si_signo = sig;
tinfo->si_errno = 0;
tinfo->si_code = 0;
- if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
+ if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
sig == SIGBUS || sig == SIGTRAP) {
/* should never come here, but who knows. The information for
the target is irrelevant */
tinfo->_sifields._sigfault._addr = 0;
+ } else if (sig == SIGIO) {
+ tinfo->_sifields._sigpoll._fd = info->si_fd;
} else if (sig >= TARGET_SIGRTMIN) {
tinfo->_sifields._rt._pid = info->si_pid;
tinfo->_sifields._rt._uid = info->si_uid;
/* XXX: potential problem if 64 bit */
- tinfo->_sifields._rt._sigval.sival_ptr =
+ tinfo->_sifields._rt._sigval.sival_ptr =
(target_ulong)info->si_value.sival_ptr;
}
}
-static void tswap_siginfo(target_siginfo_t *tinfo,
+static void tswap_siginfo(target_siginfo_t *tinfo,
const target_siginfo_t *info)
{
int sig;
tinfo->si_signo = tswap32(sig);
tinfo->si_errno = tswap32(info->si_errno);
tinfo->si_code = tswap32(info->si_code);
- if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
+ if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
sig == SIGBUS || sig == SIGTRAP) {
- tinfo->_sifields._sigfault._addr =
+ tinfo->_sifields._sigfault._addr =
tswapl(info->_sifields._sigfault._addr);
+ } else if (sig == SIGIO) {
+ tinfo->_sifields._sigpoll._fd = tswap32(info->_sifields._sigpoll._fd);
} else if (sig >= TARGET_SIGRTMIN) {
tinfo->_sifields._rt._pid = tswap32(info->_sifields._rt._pid);
tinfo->_sifields._rt._uid = tswap32(info->_sifields._rt._uid);
- tinfo->_sifields._rt._sigval.sival_ptr =
+ tinfo->_sifields._rt._sigval.sival_ptr =
tswapl(info->_sifields._rt._sigval.sival_ptr);
}
}
}
/* XXX: we support only POSIX RT signals are used. */
-/* XXX: find a solution for 64 bit (additionnal malloced data is needed) */
+/* XXX: find a solution for 64 bit (additional malloced data is needed) */
void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo)
{
info->si_signo = tswap32(tinfo->si_signo);
info->si_code = tswap32(tinfo->si_code);
info->si_pid = tswap32(tinfo->_sifields._rt._pid);
info->si_uid = tswap32(tinfo->_sifields._rt._uid);
- info->si_value.sival_ptr =
+ info->si_value.sival_ptr =
(void *)tswapl(tinfo->_sifields._rt._sigval.sival_ptr);
}
void signal_init(void)
{
struct sigaction act;
- int i;
+ int i, j;
+
+ /* generate signal conversion tables */
+ for(i = 1; i <= 64; i++) {
+ if (host_to_target_signal_table[i] == 0)
+ host_to_target_signal_table[i] = i;
+ }
+ for(i = 1; i <= 64; i++) {
+ j = host_to_target_signal_table[i];
+ target_to_host_signal_table[j] = i;
+ }
/* set all host signal handlers. ALL signals are blocked during
the handlers to serialize them. */
for(i = 1; i < NSIG; i++) {
sigaction(i, &act, NULL);
}
-
+
memset(sigact_table, 0, sizeof(sigact_table));
first_free = &sigqueue_table[0];
- for(i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++)
+ for(i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++)
sigqueue_table[i].next = &sigqueue_table[i + 1];
sigqueue_table[MAX_SIGQUEUE_SIZE - 1].next = NULL;
}
{
int host_sig;
host_sig = target_to_host_signal(sig);
- fprintf(stderr, "qemu: uncaught target signal %d (%s) - exiting\n",
+ fprintf(stderr, "qemu: uncaught target signal %d (%s) - exiting\n",
sig, strsignal(host_sig));
#if 1
_exit(-host_sig);
target_ulong handler;
#if defined(DEBUG_SIGNAL)
- fprintf(stderr, "queue_signal: sig=%d\n",
+ fprintf(stderr, "queue_signal: sig=%d\n",
sig);
#endif
k = &sigact_table[sig - 1];
handler = k->sa._sa_handler;
if (handler == TARGET_SIG_DFL) {
/* default handler : ignore some signal. The other are fatal */
- if (sig != TARGET_SIGCHLD &&
- sig != TARGET_SIGURG &&
+ if (sig != TARGET_SIGCHLD &&
+ sig != TARGET_SIGURG &&
sig != TARGET_SIGWINCH) {
force_sig(sig);
} else {
}
}
-#if defined(DEBUG_SIGNAL)
-#ifdef __i386__
-static void dump_regs(struct ucontext *uc)
-{
- fprintf(stderr,
- "EAX=%08x EBX=%08x ECX=%08x EDX=%08x\n"
- "ESI=%08x EDI=%08x EBP=%08x ESP=%08x\n"
- "EFL=%08x EIP=%08x\n",
- uc->uc_mcontext.gregs[EAX],
- uc->uc_mcontext.gregs[EBX],
- uc->uc_mcontext.gregs[ECX],
- uc->uc_mcontext.gregs[EDX],
- uc->uc_mcontext.gregs[ESI],
- uc->uc_mcontext.gregs[EDI],
- uc->uc_mcontext.gregs[EBP],
- uc->uc_mcontext.gregs[ESP],
- uc->uc_mcontext.gregs[EFL],
- uc->uc_mcontext.gregs[EIP]);
-}
-#else
-static void dump_regs(struct ucontext *uc)
-{
-}
-#endif
-
-#endif
-
-static void host_signal_handler(int host_signum, siginfo_t *info,
+static void host_signal_handler(int host_signum, siginfo_t *info,
void *puc)
{
int sig;
/* the CPU emulator uses some host signals to detect exceptions,
we we forward to it some signals */
- if (host_signum == SIGSEGV || host_signum == SIGBUS) {
+ if (host_signum == SIGSEGV || host_signum == SIGBUS
+#if defined(TARGET_I386) && defined(USE_CODE_COPY)
+ || host_signum == SIGFPE
+#endif
+ ) {
if (cpu_signal_handler(host_signum, info, puc))
return;
}
return;
#if defined(DEBUG_SIGNAL)
fprintf(stderr, "qemu: got signal %d\n", sig);
- dump_regs(puc);
#endif
host_to_target_siginfo_noswap(&tinfo, info);
if (queue_signal(sig, &tinfo) == 1) {
}
}
+int do_sigaltstack(const struct target_sigaltstack *uss,
+ struct target_sigaltstack *uoss,
+ target_ulong sp)
+{
+ int ret;
+ struct target_sigaltstack oss;
+
+ /* XXX: test errors */
+ if(uoss)
+ {
+ __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)
+ {
+ struct target_sigaltstack ss;
+
+ ret = -EFAULT;
+ if (!access_ok(VERIFY_READ, uss, sizeof(*uss))
+ || __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;
+
+ ret = -EPERM;
+ if (on_sig_stack(sp))
+ goto out;
+
+ ret = -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 = -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) {
+ ret = -EFAULT;
+ if (!access_ok(VERIFY_WRITE, uoss, sizeof(oss)))
+ goto out;
+ memcpy(uoss, &oss, sizeof(oss));
+ }
+
+ ret = 0;
+out:
+ return ret;
+}
+
int do_sigaction(int sig, const struct target_sigaction *act,
struct target_sigaction *oact)
{
struct emulated_sigaction *k;
+ struct sigaction act1;
+ int host_sig;
- if (sig < 1 || sig > TARGET_NSIG)
+ if (sig < 1 || sig > TARGET_NSIG || sig == SIGKILL || sig == SIGSTOP)
return -EINVAL;
k = &sigact_table[sig - 1];
-#if defined(DEBUG_SIGNAL) && 0
- fprintf(stderr, "sigaction sig=%d act=0x%08x, oact=0x%08x\n",
+#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._sa_handler);
oact->sa_flags = tswapl(k->sa.sa_flags);
+#if !defined(TARGET_MIPS)
oact->sa_restorer = tswapl(k->sa.sa_restorer);
+#endif
oact->sa_mask = k->sa.sa_mask;
}
if (act) {
k->sa._sa_handler = tswapl(act->_sa_handler);
k->sa.sa_flags = tswapl(act->sa_flags);
+#if !defined(TARGET_MIPS)
k->sa.sa_restorer = tswapl(act->sa_restorer);
+#endif
k->sa.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.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._sa_handler == TARGET_SIG_IGN) {
+ act1.sa_sigaction = (void *)SIG_IGN;
+ } else if (k->sa._sa_handler == TARGET_SIG_DFL) {
+ act1.sa_sigaction = (void *)SIG_DFL;
+ } else {
+ act1.sa_sigaction = host_signal_handler;
+ }
+ sigaction(host_sig, &act1, NULL);
+ }
}
return 0;
}
+#ifndef offsetof
+#define offsetof(type, field) ((size_t) &((type *)0)->field)
+#endif
+
+static inline int copy_siginfo_to_user(target_siginfo_t *tinfo,
+ const target_siginfo_t *info)
+{
+ tswap_siginfo(tinfo, info);
+ return 0;
+}
+
#ifdef TARGET_I386
/* from the Linux kernel */
target_ulong cr2;
};
-typedef struct target_sigaltstack {
- target_ulong ss_sp;
- int ss_flags;
- target_ulong ss_size;
-} target_stack_t;
-
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; /* mask last for extensibility */
+ target_ulong tuc_flags;
+ target_ulong tuc_link;
+ target_stack_t tuc_stack;
+ struct target_sigcontext tuc_mcontext;
+ target_sigset_t tuc_sigmask; /* mask last for extensibility */
};
struct sigframe
* Set up a signal frame.
*/
-#define __put_user(x,ptr)\
-({\
- int size = sizeof(*ptr);\
- switch(size) {\
- case 1:\
- stb(ptr, (typeof(*ptr))(x));\
- break;\
- case 2:\
- stw(ptr, (typeof(*ptr))(x));\
- break;\
- case 4:\
- stl(ptr, (typeof(*ptr))(x));\
- break;\
- case 8:\
- stq(ptr, (typeof(*ptr))(x));\
- break;\
- default:\
- abort();\
- }\
- 0;\
-})
-
-#define get_user(val, ptr) (typeof(*ptr))(*(ptr))
-
-
-#define __copy_to_user(dst, src, size)\
-({\
- memcpy(dst, src, size);\
- 0;\
-})
-
-static inline int copy_siginfo_to_user(target_siginfo_t *tinfo,
- const target_siginfo_t *info)
-{
- tswap_siginfo(tinfo, info);
- return 0;
-}
-
/* XXX: save x87 state */
static int
setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate,
/* Default to using normal stack */
esp = env->regs[R_ESP];
-#if 0
/* This is the X/Open sanctioned signal stack switching. */
- if (ka->sa.sa_flags & SA_ONSTACK) {
- if (sas_ss_flags(esp) == 0)
- esp = current->sas_ss_sp + current->sas_ss_size;
- }
+ if (ka->sa.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
-#endif
+ else
if ((env->segs[R_SS].selector & 0xffff) != __USER_DS &&
!(ka->sa.sa_flags & TARGET_SA_RESTORER) &&
ka->sa.sa_restorer) {
esp = (unsigned long) ka->sa.sa_restorer;
}
- return (void *)((esp - frame_size) & -8ul);
+ return g2h((esp - frame_size) & -8ul);
}
static void setup_frame(int sig, struct emulated_sigaction *ka,
target_sigset_t *set, CPUX86State *env)
{
struct sigframe *frame;
- int err = 0;
+ int i, err = 0;
frame = get_sigframe(ka, env, sizeof(*frame));
-#if 0
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
goto give_sigsegv;
-#endif
err |= __put_user((/*current->exec_domain
&& current->exec_domain->signal_invmap
&& sig < 32
if (err)
goto give_sigsegv;
- if (TARGET_NSIG_WORDS > 1) {
- err |= __copy_to_user(frame->extramask, &set->sig[1],
- sizeof(frame->extramask));
- }
- 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. */
err |= __put_user(frame->retcode, &frame->pretcode);
/* This is popl %eax ; movl $,%eax ; int $0x80 */
err |= __put_user(0xb858, (short *)(frame->retcode+0));
+#if defined(TARGET_X86_64)
+#warning "Fix this !"
+#else
err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2));
+#endif
err |= __put_user(0x80cd, (short *)(frame->retcode+6));
}
goto give_sigsegv;
/* Set up registers for signal handler */
- env->regs[R_ESP] = (unsigned long) frame;
+ env->regs[R_ESP] = h2g(frame);
env->eip = (unsigned long) ka->sa._sa_handler;
cpu_x86_load_seg(env, R_DS, __USER_DS);
force_sig(TARGET_SIGSEGV /* , current */);
}
-static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
+static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUX86State *env)
{
struct rt_sigframe *frame;
- int err = 0;
+ int i, err = 0;
frame = get_sigframe(ka, env, sizeof(*frame));
-#if 0
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
goto give_sigsegv;
-#endif
err |= __put_user((/*current->exec_domain
&& current->exec_domain->signal_invmap
goto give_sigsegv;
/* Create the ucontext. */
- err |= __put_user(0, &frame->uc.uc_flags);
- err |= __put_user(0, &frame->uc.uc_link);
- err |= __put_user(/*current->sas_ss_sp*/ 0, &frame->uc.uc_stack.ss_sp);
- err |= __put_user(/* sas_ss_flags(regs->esp) */ 0,
- &frame->uc.uc_stack.ss_flags);
- err |= __put_user(/* current->sas_ss_size */ 0, &frame->uc.uc_stack.ss_size);
- err |= setup_sigcontext(&frame->uc.uc_mcontext, &frame->fpstate,
+ 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]);
- err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
- if (err)
- goto give_sigsegv;
+ 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. */
cpu_x86_load_seg(env, R_CS, lduw(&sc->cs) | 3);
cpu_x86_load_seg(env, R_SS, lduw(&sc->ss) | 3);
-
+
{
unsigned int tmpflags;
tmpflags = ldl(&sc->eflags);
long do_sigreturn(CPUX86State *env)
{
- struct sigframe *frame = (struct sigframe *)(env->regs[R_ESP] - 8);
+ struct sigframe *frame = (struct sigframe *)g2h(env->regs[R_ESP] - 8);
target_sigset_t target_set;
sigset_t set;
int eax, i;
fprintf(stderr, "do_sigreturn\n");
#endif
/* set blocked signals */
- target_set.sig[0] = frame->sc.oldmask;
- for(i = 1; i < TARGET_NSIG_WORDS; i++)
- target_set.sig[i] = frame->extramask[i - 1];
+ 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(&set, &target_set);
+ target_to_host_sigset_internal(&set, &target_set);
sigprocmask(SIG_SETMASK, &set, NULL);
-
+
/* restore registers */
if (restore_sigcontext(env, &frame->sc, &eax))
goto badframe;
long do_rt_sigreturn(CPUX86State *env)
{
- struct rt_sigframe *frame = (struct rt_sigframe *)(env->regs[R_ESP] - 4);
- target_sigset_t target_set;
+ struct rt_sigframe *frame = (struct rt_sigframe *)g2h(env->regs[R_ESP] - 4);
sigset_t set;
- // stack_t st;
int eax;
#if 0
if (verify_area(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
#endif
- memcpy(&target_set, &frame->uc.uc_sigmask, sizeof(target_sigset_t));
-
- target_to_host_sigset(&set, &target_set);
+ target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
sigprocmask(SIG_SETMASK, &set, NULL);
-
- if (restore_sigcontext(env, &frame->uc.uc_mcontext, &eax))
+
+ if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax))
goto badframe;
-#if 0
- if (__copy_from_user(&st, &frame->uc.uc_stack, sizeof(st)))
+ if (do_sigaltstack(&frame->uc.tuc_stack, NULL, get_sp_from_cpustate(env)) == -EFAULT)
goto badframe;
- /* It is more difficult to avoid calling this function than to
- call it and ignore errors. */
- do_sigaltstack(&st, NULL, regs->esp);
-#endif
+
return eax;
badframe:
return 0;
}
-#else
+#elif defined(TARGET_ARM)
-static void setup_frame(int sig, struct emulated_sigaction *ka,
- target_sigset_t *set, CPUState *env)
+struct target_sigcontext {
+ target_ulong trap_no;
+ target_ulong error_code;
+ target_ulong oldmask;
+ target_ulong arm_r0;
+ target_ulong arm_r1;
+ target_ulong arm_r2;
+ target_ulong arm_r3;
+ target_ulong arm_r4;
+ target_ulong arm_r5;
+ target_ulong arm_r6;
+ target_ulong arm_r7;
+ target_ulong arm_r8;
+ target_ulong arm_r9;
+ target_ulong arm_r10;
+ target_ulong arm_fp;
+ target_ulong arm_ip;
+ target_ulong arm_sp;
+ target_ulong arm_lr;
+ target_ulong arm_pc;
+ target_ulong arm_cpsr;
+ target_ulong fault_address;
+};
+
+struct target_ucontext {
+ target_ulong tuc_flags;
+ target_ulong tuc_link;
+ target_stack_t tuc_stack;
+ struct target_sigcontext tuc_mcontext;
+ target_sigset_t tuc_sigmask; /* mask last for extensibility */
+};
+
+struct sigframe
{
- fprintf(stderr, "setup_frame: not implemented\n");
-}
+ struct target_sigcontext sc;
+ target_ulong extramask[TARGET_NSIG_WORDS-1];
+ target_ulong retcode;
+};
-static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
- target_siginfo_t *info,
- target_sigset_t *set, CPUState *env)
+struct rt_sigframe
{
- fprintf(stderr, "setup_rt_frame: not implemented\n");
-}
+ struct target_siginfo *pinfo;
+ void *puc;
+ struct target_siginfo info;
+ struct target_ucontext uc;
+ target_ulong retcode;
+};
-long do_sigreturn(CPUState *env)
+#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 target_ulong retcodes[4] = {
+ SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN,
+ SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN
+};
+
+
+#define __put_user_error(x,p,e) __put_user(x, p)
+#define __get_user_error(x,p,e) __get_user(x, p)
+
+static inline int valid_user_regs(CPUState *regs)
{
- fprintf(stderr, "do_sigreturn: not implemented\n");
- return -ENOSYS;
+ return 1;
}
-long do_rt_sigreturn(CPUState *env)
+static int
+setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
+ CPUState *env, unsigned long mask)
{
- fprintf(stderr, "do_rt_sigreturn: not implemented\n");
- return -ENOSYS;
-}
+ int err = 0;
+ __put_user_error(env->regs[0], &sc->arm_r0, err);
+ __put_user_error(env->regs[1], &sc->arm_r1, err);
+ __put_user_error(env->regs[2], &sc->arm_r2, err);
+ __put_user_error(env->regs[3], &sc->arm_r3, err);
+ __put_user_error(env->regs[4], &sc->arm_r4, err);
+ __put_user_error(env->regs[5], &sc->arm_r5, err);
+ __put_user_error(env->regs[6], &sc->arm_r6, err);
+ __put_user_error(env->regs[7], &sc->arm_r7, err);
+ __put_user_error(env->regs[8], &sc->arm_r8, err);
+ __put_user_error(env->regs[9], &sc->arm_r9, err);
+ __put_user_error(env->regs[10], &sc->arm_r10, err);
+ __put_user_error(env->regs[11], &sc->arm_fp, err);
+ __put_user_error(env->regs[12], &sc->arm_ip, err);
+ __put_user_error(env->regs[13], &sc->arm_sp, err);
+ __put_user_error(env->regs[14], &sc->arm_lr, err);
+ __put_user_error(env->regs[15], &sc->arm_pc, err);
+#ifdef TARGET_CONFIG_CPU_32
+ __put_user_error(cpsr_read(env), &sc->arm_cpsr, err);
#endif
-void process_pending_signals(void *cpu_env)
+ __put_user_error(/* current->thread.trap_no */ 0, &sc->trap_no, err);
+ __put_user_error(/* current->thread.error_code */ 0, &sc->error_code, err);
+ __put_user_error(/* current->thread.address */ 0, &sc->fault_address, err);
+ __put_user_error(mask, &sc->oldmask, err);
+
+ return err;
+}
+
+static inline void *
+get_sigframe(struct emulated_sigaction *ka, CPUState *regs, int framesize)
{
- int sig;
- target_ulong handler;
- sigset_t set, old_set;
- target_sigset_t target_old_set;
- struct emulated_sigaction *k;
- struct sigqueue *q;
-
- if (!signal_pending)
- return;
+ unsigned long sp = regs->regs[13];
+
+ /*
+ * This is the X/Open sanctioned signal stack switching.
+ */
+ if ((ka->sa.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 g2h((sp - framesize) & ~7);
+}
- k = sigact_table;
- for(sig = 1; sig <= TARGET_NSIG; sig++) {
- if (k->pending)
- goto handle_signal;
- k++;
- }
- /* if no signal is pending, just return */
- signal_pending = 0;
- return;
+static int
+setup_return(CPUState *env, struct emulated_sigaction *ka,
+ target_ulong *rc, void *frame, int usig)
+{
+ target_ulong handler = (target_ulong)ka->sa._sa_handler;
+ target_ulong retcode;
+ int thumb = 0;
+#if defined(TARGET_CONFIG_CPU_32)
+#if 0
+ target_ulong cpsr = env->cpsr;
+
+ /*
+ * Maybe we need to deliver a 32-bit signal to a 26-bit task.
+ */
+ if (ka->sa.sa_flags & SA_THIRTYTWO)
+ cpsr = (cpsr & ~MODE_MASK) | USR_MODE;
+
+#ifdef CONFIG_ARM_THUMB
+ if (elf_hwcap & HWCAP_THUMB) {
+ /*
+ * The LSB of the handler determines if we're going to
+ * be using THUMB or ARM mode for this signal handler.
+ */
+ thumb = handler & 1;
+
+ if (thumb)
+ cpsr |= T_BIT;
+ else
+ cpsr &= ~T_BIT;
+ }
+#endif /* CONFIG_ARM_THUMB */
+#endif /* 0 */
+#endif /* TARGET_CONFIG_CPU_32 */
- handle_signal:
-#ifdef DEBUG_SIGNAL
- fprintf(stderr, "qemu: process signal %d\n", sig);
+ if (ka->sa.sa_flags & TARGET_SA_RESTORER) {
+ retcode = (target_ulong)ka->sa.sa_restorer;
+ } else {
+ unsigned int idx = thumb;
+
+ if (ka->sa.sa_flags & TARGET_SA_SIGINFO)
+ idx += 2;
+
+ if (__put_user(retcodes[idx], rc))
+ return 1;
+#if 0
+ flush_icache_range((target_ulong)rc,
+ (target_ulong)(rc + 1));
#endif
- /* dequeue signal */
- q = k->first;
- k->first = q->next;
- if (!k->first)
- k->pending = 0;
+ retcode = ((target_ulong)rc) + thumb;
+ }
- handler = k->sa._sa_handler;
- if (handler == TARGET_SIG_DFL) {
- /* default handler : ignore some signal. The other are fatal */
- if (sig != TARGET_SIGCHLD &&
- sig != TARGET_SIGURG &&
- sig != TARGET_SIGWINCH) {
- 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, &k->sa.sa_mask);
- /* SA_NODEFER indicates that the current signal should not be
- blocked during the handler */
- if (!(k->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(&target_old_set, &old_set);
+ env->regs[0] = usig;
+ env->regs[13] = h2g(frame);
+ env->regs[14] = retcode;
+ env->regs[15] = handler & (thumb ? ~1 : ~3);
- /* if the CPU is in VM86 mode, we restore the 32 bit values */
-#ifdef TARGET_I386
- {
- CPUX86State *env = cpu_env;
- if (env->eflags & VM_MASK)
- save_v86_state(env);
- }
+#if 0
+#ifdef TARGET_CONFIG_CPU_32
+ env->cpsr = cpsr;
#endif
- /* prepare the stack frame of the virtual CPU */
- if (k->sa.sa_flags & TARGET_SA_SIGINFO)
- setup_rt_frame(sig, k, &q->info, &target_old_set, cpu_env);
- else
- setup_frame(sig, k, &target_old_set, cpu_env);
- if (k->sa.sa_flags & TARGET_SA_RESETHAND)
- k->sa._sa_handler = TARGET_SIG_DFL;
- }
- if (q != &k->info)
- free_sigqueue(q);
+#endif
+
+ return 0;
+}
+
+static void setup_frame(int usig, struct emulated_sigaction *ka,
+ target_sigset_t *set, CPUState *regs)
+{
+ struct sigframe *frame = get_sigframe(ka, regs, sizeof(*frame));
+ int i, err = 0;
+
+ err |= setup_sigcontext(&frame->sc, /*&frame->fpstate,*/ regs, set->sig[0]);
+
+ for(i = 1; i < TARGET_NSIG_WORDS; i++) {
+ if (__put_user(set->sig[i], &frame->extramask[i - 1]))
+ return;
+ }
+
+ if (err == 0)
+ err = setup_return(regs, ka, &frame->retcode, frame, usig);
+ // return err;
}
+static void setup_rt_frame(int usig, struct emulated_sigaction *ka,
+ target_siginfo_t *info,
+ target_sigset_t *set, CPUState *env)
+{
+ struct rt_sigframe *frame = get_sigframe(ka, env, sizeof(*frame));
+ struct target_sigaltstack stack;
+ int i, err = 0;
+
+ if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
+ return /* 1 */;
+ __put_user_error(&frame->info, (target_ulong *)&frame->pinfo, err);
+ __put_user_error(&frame->uc, (target_ulong *)&frame->puc, err);
+ err |= 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, 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);
+ if (!access_ok(VERIFY_WRITE, &frame->uc.tuc_stack, sizeof(stack)))
+ err = 1;
+ else
+ memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
+
+ err |= setup_sigcontext(&frame->uc.tuc_mcontext, /*&frame->fpstate,*/
+ env, set->sig[0]);
+ for(i = 0; i < TARGET_NSIG_WORDS; i++) {
+ if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
+ return;
+ }
+
+ if (err == 0)
+ err = setup_return(env, ka, &frame->retcode, frame, usig);
+
+ if (err == 0) {
+ /*
+ * For realtime signals we must also set the second and third
+ * arguments for the signal handler.
+ * -- Peter Maydell <pmaydell@chiark.greenend.org.uk> 2000-12-06
+ */
+ env->regs[1] = (target_ulong)frame->pinfo;
+ env->regs[2] = (target_ulong)frame->puc;
+ }
+
+ // return err;
+}
+
+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, 0xffffffff);
+#endif
+
+ err |= !valid_user_regs(env);
+
+ return err;
+}
+
+long do_sigreturn(CPUState *env)
+{
+ struct sigframe *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 = (struct sigframe *)g2h(env->regs[13]);
+
+#if 0
+ if (verify_area(VERIFY_READ, frame, sizeof (*frame)))
+ goto badframe;
+#endif
+ 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
+ return env->regs[0];
+
+badframe:
+ force_sig(SIGSEGV /* , current */);
+ return 0;
+}
+
+long do_rt_sigreturn(CPUState *env)
+{
+ struct rt_sigframe *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 = (struct rt_sigframe *)env->regs[13];
+
+#if 0
+ if (verify_area(VERIFY_READ, frame, sizeof (*frame)))
+ goto badframe;
+#endif
+ 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->uc.tuc_stack, NULL, 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
+ return env->regs[0];
+
+badframe:
+ force_sig(SIGSEGV /* , current */);
+ return 0;
+}
+
+#elif defined(TARGET_SPARC)
+
+#define __SUNOS_MAXWIN 31
+
+/* This is what SunOS does, so shall I. */
+struct target_sigcontext {
+ target_ulong sigc_onstack; /* state to restore */
+
+ target_ulong sigc_mask; /* sigmask to restore */
+ target_ulong sigc_sp; /* stack pointer */
+ target_ulong sigc_pc; /* program counter */
+ target_ulong sigc_npc; /* next program counter */
+ target_ulong sigc_psr; /* for condition codes etc */
+ target_ulong sigc_g1; /* User uses these two registers */
+ target_ulong sigc_o0; /* within the trampoline code. */
+
+ /* Now comes information regarding the users window set
+ * at the time of the signal.
+ */
+ target_ulong sigc_oswins; /* outstanding windows */
+
+ /* stack ptrs for each regwin buf */
+ char *sigc_spbuf[__SUNOS_MAXWIN];
+
+ /* Windows to restore after signal */
+ struct {
+ target_ulong locals[8];
+ target_ulong ins[8];
+ } sigc_wbuf[__SUNOS_MAXWIN];
+};
+/* A Sparc stack frame */
+struct sparc_stackf {
+ target_ulong locals[8];
+ target_ulong ins[6];
+ struct sparc_stackf *fp;
+ target_ulong callers_pc;
+ char *structptr;
+ target_ulong xargs[6];
+ target_ulong xxargs[1];
+};
+
+typedef struct {
+ struct {
+ target_ulong psr;
+ target_ulong pc;
+ target_ulong npc;
+ target_ulong y;
+ target_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;
+ qemu_siginfo_fpu_t *fpu_save;
+ target_ulong insns[2] __attribute__ ((aligned (8)));
+ target_ulong extramask[TARGET_NSIG_WORDS - 1];
+ target_ulong extra_size; /* Should be 0 */
+ qemu_siginfo_fpu_t fpu_state;
+};
+struct target_rt_signal_frame {
+ struct sparc_stackf ss;
+ siginfo_t info;
+ target_ulong regs[20];
+ sigset_t mask;
+ qemu_siginfo_fpu_t *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_I6 6
+#define UREG_I7 7
+#define UREG_L0 8
+#define UREG_FP UREG_I6
+#define UREG_SP UREG_O6
+
+static inline void *get_sigframe(struct emulated_sigaction *sa, CPUState *env, unsigned long framesize)
+{
+ unsigned long sp;
+
+ sp = env->regwptr[UREG_FP];
+
+ /* This is the X/Open sanctioned signal stack switching. */
+ if (sa->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 g2h(sp - framesize);
+}
+
+static int
+setup___siginfo(__siginfo_t *si, CPUState *env, target_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 emulated_sigaction *ka,
+ target_sigset_t *set, CPUState *env)
+{
+ struct target_signal_frame *sf;
+ int sigframe_size, err, i;
+
+ /* 1. Make sure everything is clean */
+ //synchronize_user_stack();
+
+ sigframe_size = NF_ALIGNEDSZ;
+
+ sf = (struct target_signal_frame *)
+ get_sigframe(ka, env, sigframe_size);
+
+ //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] = h2g(sf);
+ env->regwptr[UREG_I0] = sig;
+ env->regwptr[UREG_I1] = h2g(&sf->info);
+ env->regwptr[UREG_I2] = h2g(&sf->info);
+
+ /* 4. signal handler */
+ env->pc = (unsigned long) ka->sa._sa_handler;
+ env->npc = (env->pc + 4);
+ /* 5. return to kernel instructions */
+ if (ka->sa.sa_restorer)
+ env->regwptr[UREG_I7] = (unsigned long)ka->sa.sa_restorer;
+ else {
+ env->regwptr[UREG_I7] = h2g(&(sf->insns[0]) - 2);
+
+ /* mov __NR_sigreturn, %g1 */
+ err |= __put_user(0x821020d8, &sf->insns[0]);
+
+ /* t 0x10 */
+ err |= __put_user(0x91d02010, &sf->insns[1]);
+ if (err)
+ goto sigsegv;
+
+ /* Flush instruction space. */
+ //flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
+ // tb_flush(env);
+ }
+ return;
+
+ //sigill_and_return:
+ force_sig(TARGET_SIGILL);
+sigsegv:
+ //fprintf(stderr, "force_sig\n");
+ 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 emulated_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)
+{
+ struct target_signal_frame *sf;
+ uint32_t up_psr, pc, npc;
+ target_sigset_t set;
+ sigset_t host_set;
+ target_ulong fpu_save;
+ int err, i;
+
+ sf = (struct target_signal_frame *)g2h(env->regwptr[UREG_FP]);
+#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 0
+ if (verify_area (VERIFY_READ, sf, sizeof (*sf)))
+ goto segv_and_exit;
+#endif
+
+ if (((uint) sf) & 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, (target_ulong *)&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;
+
+ return env->regwptr[0];
+
+segv_and_exit:
+ force_sig(TARGET_SIGSEGV);
+}
+
+long do_rt_sigreturn(CPUState *env)
+{
+ fprintf(stderr, "do_rt_sigreturn: not implemented\n");
+ return -ENOSYS;
+}
+
+#elif defined(TARGET_MIPS64)
+
+# warning signal handling not implemented
+
+static void setup_frame(int sig, struct emulated_sigaction *ka,
+ target_sigset_t *set, CPUState *env)
+{
+ fprintf(stderr, "setup_frame: not implemented\n");
+}
+
+static void setup_rt_frame(int sig, struct emulated_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 -ENOSYS;
+}
+
+long do_rt_sigreturn(CPUState *env)
+{
+ fprintf(stderr, "do_rt_sigreturn: not implemented\n");
+ return -ENOSYS;
+}
+
+#elif defined(TARGET_MIPSN32)
+
+# warning signal handling not implemented
+
+static void setup_frame(int sig, struct emulated_sigaction *ka,
+ target_sigset_t *set, CPUState *env)
+{
+ fprintf(stderr, "setup_frame: not implemented\n");
+}
+
+static void setup_rt_frame(int sig, struct emulated_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 -ENOSYS;
+}
+
+long do_rt_sigreturn(CPUState *env)
+{
+ fprintf(stderr, "do_rt_sigreturn: not implemented\n");
+ return -ENOSYS;
+}
+
+#elif defined(TARGET_MIPS)
+
+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;
+};
+
+/* 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->PC[regs->current_tc], &sc->sc_pc);
+
+#define save_gp_reg(i) do { \
+ err |= __put_user(regs->gpr[i][regs->current_tc], &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->HI[0][regs->current_tc], &sc->sc_mdhi);
+ err |= __put_user(regs->LO[0][regs->current_tc], &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->HI[0][regs->current_tc], &sc->sc_mdhi);
+ err |= __get_user(regs->LO[0][regs->current_tc], &sc->sc_mdlo);
+
+#define restore_gp_reg(i) do { \
+ err |= __get_user(regs->gpr[i][regs->current_tc], &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 void *
+get_sigframe(struct emulated_sigaction *ka, CPUState *regs, size_t frame_size)
+{
+ unsigned long sp;
+
+ /* Default to using normal stack */
+ sp = regs->gpr[29][regs->current_tc];
+
+ /*
+ * 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.sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
+ sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
+ }
+
+ return g2h((sp - frame_size) & ~7);
+}
+
+static void setup_frame(int sig, struct emulated_sigaction * ka,
+ target_sigset_t *set, CPUState *regs)
+{
+ struct sigframe *frame;
+ int i;
+
+ frame = get_sigframe(ka, regs, sizeof(*frame));
+ if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
+ 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->gpr[ 4][regs->current_tc] = sig;
+ regs->gpr[ 5][regs->current_tc] = 0;
+ regs->gpr[ 6][regs->current_tc] = h2g(&frame->sf_sc);
+ regs->gpr[29][regs->current_tc] = h2g(frame);
+ regs->gpr[31][regs->current_tc] = h2g(frame->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->PC[regs->current_tc] = regs->gpr[25][regs->current_tc] = ka->sa._sa_handler;
+ return;
+
+give_sigsegv:
+ force_sig(TARGET_SIGSEGV/*, current*/);
+ return;
+}
+
+long do_sigreturn(CPUState *regs)
+{
+ struct sigframe *frame;
+ sigset_t blocked;
+ target_sigset_t target_set;
+ int i;
+
+#if defined(DEBUG_SIGNAL)
+ fprintf(stderr, "do_sigreturn\n");
+#endif
+ frame = (struct sigframe *) regs->gpr[29][regs->current_tc];
+ if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+ 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->PC[regs->current_tc] = 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 0;
+
+badframe:
+ force_sig(TARGET_SIGSEGV/*, current*/);
+ return 0;
+}
+
+static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
+ target_siginfo_t *info,
+ target_sigset_t *set, CPUState *env)
+{
+ fprintf(stderr, "setup_rt_frame: not implemented\n");
+}
+
+long do_rt_sigreturn(CPUState *env)
+{
+ fprintf(stderr, "do_rt_sigreturn: not implemented\n");
+ return -ENOSYS;
+}
+
+#else
+
+static void setup_frame(int sig, struct emulated_sigaction *ka,
+ target_sigset_t *set, CPUState *env)
+{
+ fprintf(stderr, "setup_frame: not implemented\n");
+}
+
+static void setup_rt_frame(int sig, struct emulated_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 -ENOSYS;
+}
+
+long do_rt_sigreturn(CPUState *env)
+{
+ fprintf(stderr, "do_rt_sigreturn: not implemented\n");
+ return -ENOSYS;
+}
+
+#endif
+
+void process_pending_signals(void *cpu_env)
+{
+ int sig;
+ target_ulong handler;
+ sigset_t set, old_set;
+ target_sigset_t target_old_set;
+ struct emulated_sigaction *k;
+ struct sigqueue *q;
+
+ if (!signal_pending)
+ return;
+
+ k = sigact_table;
+ for(sig = 1; sig <= TARGET_NSIG; sig++) {
+ if (k->pending)
+ goto handle_signal;
+ k++;
+ }
+ /* if no signal is pending, just return */
+ 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) {
+ fprintf (stderr, "Lost signal\n");
+ abort();
+ }
+
+ handler = k->sa._sa_handler;
+ if (handler == TARGET_SIG_DFL) {
+ /* default handler : ignore some signal. The other are fatal */
+ if (sig != TARGET_SIGCHLD &&
+ sig != TARGET_SIGURG &&
+ sig != TARGET_SIGWINCH) {
+ 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, &k->sa.sa_mask);
+ /* SA_NODEFER indicates that the current signal should not be
+ blocked during the handler */
+ if (!(k->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 (k->sa.sa_flags & TARGET_SA_SIGINFO)
+ setup_rt_frame(sig, k, &q->info, &target_old_set, cpu_env);
+ else
+ setup_frame(sig, k, &target_old_set, cpu_env);
+ if (k->sa.sa_flags & TARGET_SA_RESETHAND)
+ k->sa._sa_handler = TARGET_SIG_DFL;
+ }
+ if (q != &k->info)
+ free_sigqueue(q);
+}
projects / qemu / blobdiff