*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+ * MA 02110-1301, USA.
*/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <signal.h>
#include <errno.h>
+#include <assert.h>
#include <sys/ucontext.h>
#include "qemu.h"
+#include "qemu-common.h"
#include "target_signal.h"
//#define DEBUG_SIGNAL
-#define MAX_SIGQUEUE_SIZE 1024
-
-struct sigqueue {
- struct sigqueue *next;
- target_siginfo_t info;
-};
-
-struct emulated_sigaction {
- struct target_sigaction sa;
- int pending; /* true if signal is pending */
- struct sigqueue *first;
- struct sigqueue info; /* in order to always have memory for the
- first signal, we put it here */
-};
-
-struct target_sigaltstack target_sigaltstack_used = {
+static 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 struct target_sigaction sigact_table[TARGET_NSIG];
static void host_signal_handler(int host_signum, siginfo_t *info,
void *puc);
[SIGPWR] = TARGET_SIGPWR,
[SIGSYS] = TARGET_SIGSYS,
/* next signals stay the same */
+ /* Nasty hack: Reverse SIGRTMIN and SIGRTMAX to avoid overlap with
+ host libpthread signals. This assumes noone actually uses SIGRTMAX :-/
+ To fix this properly we need to do manual signal delivery multiplexed
+ over a single host signal. */
+ [__SIGRTMIN] = __SIGRTMAX,
+ [__SIGRTMAX] = __SIGRTMIN,
};
static uint8_t target_to_host_signal_table[65];
: on_sig_stack(sp) ? SS_ONSTACK : 0);
}
-static inline int host_to_target_signal(int sig)
+int host_to_target_signal(int sig)
{
+ if (sig > 64)
+ return sig;
return host_to_target_signal_table[sig];
}
-static inline int target_to_host_signal(int sig)
+int target_to_host_signal(int sig)
{
+ if (sig > 64)
+ return sig;
return target_to_host_signal_table[sig];
}
+static inline void target_sigemptyset(target_sigset_t *set)
+{
+ memset(set, 0, sizeof(*set));
+}
+
+static inline void target_sigaddset(target_sigset_t *set, int signum)
+{
+ signum--;
+ abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW);
+ set->sig[signum / TARGET_NSIG_BPW] |= mask;
+}
+
+static inline int target_sigismember(const target_sigset_t *set, int signum)
+{
+ signum--;
+ abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW);
+ return ((set->sig[signum / TARGET_NSIG_BPW] & mask) != 0);
+}
+
static void host_to_target_sigset_internal(target_sigset_t *d,
const sigset_t *s)
{
int 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_ABI_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];
+ target_sigemptyset(d);
+ for (i = 1; i <= TARGET_NSIG; i++) {
+ if (sigismember(s, i)) {
+ target_sigaddset(d, host_to_target_signal(i));
+ }
}
-#elif TARGET_ABI_BITS == 32 && HOST_LONG_BITS == 64 && TARGET_NSIG_WORDS == 2
- d->sig[0] = target_sigmask;
- d->sig[1] = sigmask >> 32;
-#else
- /* XXX: do it */
-#endif
}
void host_to_target_sigset(target_sigset_t *d, const sigset_t *s)
d->sig[i] = tswapl(d1.sig[i]);
}
-void target_to_host_sigset_internal(sigset_t *d, const target_sigset_t *s)
+static void target_to_host_sigset_internal(sigset_t *d,
+ const target_sigset_t *s)
{
int i;
- unsigned long sigmask;
- abi_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_ABI_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_ABI_BITS == 32 && HOST_LONG_BITS == 64 && TARGET_NSIG_WORDS == 2
- ((unsigned long *)d)[0] = sigmask | ((unsigned long)(s->sig[1]) << 32);
-#else
- /* XXX: do it */
-#endif /* TARGET_ABI_BITS */
+ sigemptyset(d);
+ for (i = 1; i <= TARGET_NSIG; i++) {
+ if (target_sigismember(s, i)) {
+ sigaddset(d, target_to_host_signal(i));
+ }
+ }
}
void target_to_host_sigset(sigset_t *d, const target_sigset_t *s)
sig = host_to_target_signal(info->si_signo);
tinfo->si_signo = sig;
tinfo->si_errno = 0;
- tinfo->si_code = 0;
+ tinfo->si_code = info->si_code;
if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
sig == SIGBUS || sig == SIGTRAP) {
/* should never come here, but who knows. The information for
(void *)(long)tswapl(tinfo->_sifields._rt._sigval.sival_ptr);
}
+static int fatal_signal (int sig)
+{
+ switch (sig) {
+ case TARGET_SIGCHLD:
+ case TARGET_SIGURG:
+ case TARGET_SIGWINCH:
+ /* Ignored by default. */
+ return 0;
+ case TARGET_SIGCONT:
+ case TARGET_SIGSTOP:
+ case TARGET_SIGTSTP:
+ case TARGET_SIGTTIN:
+ case TARGET_SIGTTOU:
+ /* Job control signals. */
+ return 0;
+ default:
+ return 1;
+ }
+}
+
void signal_init(void)
{
struct sigaction act;
+ struct sigaction oact;
int i, j;
+ int host_sig;
/* generate signal conversion tables */
for(i = 1; i <= 64; i++) {
/* set all host signal handlers. ALL signals are blocked during
the handlers to serialize them. */
+ memset(sigact_table, 0, sizeof(sigact_table));
+
sigfillset(&act.sa_mask);
act.sa_flags = SA_SIGINFO;
act.sa_sigaction = host_signal_handler;
- for(i = 1; i < NSIG; i++) {
- sigaction(i, &act, NULL);
+ for(i = 1; i <= TARGET_NSIG; i++) {
+ host_sig = target_to_host_signal(i);
+ sigaction(host_sig, NULL, &oact);
+ if (oact.sa_sigaction == (void *)SIG_IGN) {
+ sigact_table[i - 1]._sa_handler = TARGET_SIG_IGN;
+ } else if (oact.sa_sigaction == (void *)SIG_DFL) {
+ sigact_table[i - 1]._sa_handler = TARGET_SIG_DFL;
+ }
+ /* If there's already a handler installed then something has
+ gone horribly wrong, so don't even try to handle that case. */
+ /* Install some handlers for our own use. We need at least
+ SIGSEGV and SIGBUS, to detect exceptions. We can not just
+ trap all signals because it affects syscall interrupt
+ behavior. But do trap all default-fatal signals. */
+ if (fatal_signal (i))
+ sigaction(host_sig, &act, NULL);
}
-
- memset(sigact_table, 0, sizeof(sigact_table));
-
- first_free = &sigqueue_table[0];
- 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;
}
/* signal queue handling */
-static inline struct sigqueue *alloc_sigqueue(void)
+static inline struct sigqueue *alloc_sigqueue(CPUState *env)
{
- struct sigqueue *q = first_free;
+ TaskState *ts = env->opaque;
+ struct sigqueue *q = ts->first_free;
if (!q)
return NULL;
- first_free = q->next;
+ ts->first_free = q->next;
return q;
}
-static inline void free_sigqueue(struct sigqueue *q)
+static inline void free_sigqueue(CPUState *env, struct sigqueue *q)
{
- q->next = first_free;
- first_free = q;
+ TaskState *ts = env->opaque;
+ q->next = ts->first_free;
+ ts->first_free = q;
}
/* abort execution with signal */
-void __attribute((noreturn)) force_sig(int sig)
+static void QEMU_NORETURN force_sig(int sig)
{
int host_sig;
+ struct sigaction act;
host_sig = target_to_host_signal(sig);
fprintf(stderr, "qemu: uncaught target signal %d (%s) - exiting\n",
sig, strsignal(host_sig));
-#if 1
- _exit(-host_sig);
-#else
- {
- struct sigaction act;
- sigemptyset(&act.sa_mask);
- act.sa_flags = SA_SIGINFO;
- act.sa_sigaction = SIG_DFL;
- sigaction(SIGABRT, &act, NULL);
- abort();
- }
-#endif
+ gdb_signalled(thread_env, sig);
+
+ /* The proper exit code for dieing from an uncaught signal is
+ * -<signal>. The kernel doesn't allow exit() or _exit() to pass
+ * a negative value. To get the proper exit code we need to
+ * actually die from an uncaught signal. Here the default signal
+ * handler is installed, we send ourself a signal and we wait for
+ * it to arrive. */
+ sigfillset(&act.sa_mask);
+ act.sa_handler = SIG_DFL;
+ sigaction(host_sig, &act, NULL);
+
+ /* For some reason raise(host_sig) doesn't send the signal when
+ * statically linked on x86-64. */
+ kill(getpid(), host_sig);
+
+ /* Make sure the signal isn't masked (just reuse the mask inside
+ of act) */
+ sigdelset(&act.sa_mask, host_sig);
+ sigsuspend(&act.sa_mask);
+
+ /* unreachable */
+ assert(0);
+
}
/* queue a signal so that it will be send to the virtual CPU as soon
as possible */
-int queue_signal(int sig, target_siginfo_t *info)
+int queue_signal(CPUState *env, int sig, target_siginfo_t *info)
{
- struct emulated_sigaction *k;
+ TaskState *ts = env->opaque;
+ struct emulated_sigtable *k;
struct sigqueue *q, **pq;
abi_ulong handler;
+ int queue;
#if defined(DEBUG_SIGNAL)
fprintf(stderr, "queue_signal: sig=%d\n",
sig);
#endif
- k = &sigact_table[sig - 1];
- handler = k->sa._sa_handler;
- if (handler == TARGET_SIG_DFL) {
+ k = &ts->sigtab[sig - 1];
+ queue = gdb_queuesig ();
+ handler = sigact_table[sig - 1]._sa_handler;
+ if (!queue && handler == TARGET_SIG_DFL) {
+ if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
+ kill(getpid(),SIGSTOP);
+ return 0;
+ } else
/* default handler : ignore some signal. The other are fatal */
if (sig != TARGET_SIGCHLD &&
sig != TARGET_SIGURG &&
- sig != TARGET_SIGWINCH) {
+ sig != TARGET_SIGWINCH &&
+ sig != TARGET_SIGCONT) {
force_sig(sig);
} else {
return 0; /* indicate ignored */
}
- } else if (handler == TARGET_SIG_IGN) {
+ } else if (!queue && handler == TARGET_SIG_IGN) {
/* ignore signal */
return 0;
- } else if (handler == TARGET_SIG_ERR) {
+ } else if (!queue && handler == TARGET_SIG_ERR) {
force_sig(sig);
} else {
pq = &k->first;
/* first signal */
q = &k->info;
} else {
- q = alloc_sigqueue();
+ q = alloc_sigqueue(env);
if (!q)
return -EAGAIN;
while (*pq != NULL)
q->next = NULL;
k->pending = 1;
/* signal that a new signal is pending */
- signal_pending = 1;
+ ts->signal_pending = 1;
return 1; /* indicates that the signal was queued */
}
}
target_siginfo_t tinfo;
/* the CPU emulator uses some host signals to detect exceptions,
- we we forward to it some signals */
- if (host_signum == SIGSEGV || host_signum == SIGBUS) {
+ we forward to it some signals */
+ if ((host_signum == SIGSEGV || host_signum == SIGBUS)
+ && info->si_code > 0) {
if (cpu_signal_handler(host_signum, info, puc))
return;
}
fprintf(stderr, "qemu: got signal %d\n", sig);
#endif
host_to_target_siginfo_noswap(&tinfo, info);
- if (queue_signal(sig, &tinfo) == 1) {
+ if (queue_signal(thread_env, sig, &tinfo) == 1) {
/* interrupt the virtual CPU as soon as possible */
- cpu_interrupt(global_env, CPU_INTERRUPT_EXIT);
+ cpu_exit(thread_env);
}
}
int do_sigaction(int sig, const struct target_sigaction *act,
struct target_sigaction *oact)
{
- struct emulated_sigaction *k;
+ struct target_sigaction *k;
struct sigaction act1;
int host_sig;
int ret = 0;
- if (sig < 1 || sig > TARGET_NSIG || sig == SIGKILL || sig == SIGSTOP)
+ if (sig < 1 || sig > TARGET_NSIG || sig == TARGET_SIGKILL || sig == TARGET_SIGSTOP)
return -EINVAL;
k = &sigact_table[sig - 1];
#if defined(DEBUG_SIGNAL)
sig, (int)act, (int)oact);
#endif
if (oact) {
- oact->_sa_handler = tswapl(k->sa._sa_handler);
- oact->sa_flags = tswapl(k->sa.sa_flags);
+ oact->_sa_handler = tswapl(k->_sa_handler);
+ oact->sa_flags = tswapl(k->sa_flags);
#if !defined(TARGET_MIPS)
- oact->sa_restorer = tswapl(k->sa.sa_restorer);
+ oact->sa_restorer = tswapl(k->sa_restorer);
#endif
- oact->sa_mask = k->sa.sa_mask;
+ oact->sa_mask = k->sa_mask;
}
if (act) {
- k->sa._sa_handler = tswapl(act->_sa_handler);
- k->sa.sa_flags = tswapl(act->sa_flags);
+ /* 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.sa_restorer = tswapl(act->sa_restorer);
+ k->sa_restorer = tswapl(act->sa_restorer);
#endif
- k->sa.sa_mask = act->sa_mask;
+ 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.sa_flags & TARGET_SA_RESTART)
+ 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._sa_handler == TARGET_SIG_IGN) {
+ if (k->_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 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;
}
return ret;
}
-#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)
{
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 */
/* XXX: save x87 state */
static int
setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate,
- CPUX86State *env, unsigned long mask)
+ CPUX86State *env, abi_ulong mask, abi_ulong fpstate_addr)
{
int err = 0;
uint16_t magic;
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, (void *)fpstate, 1);
+ cpu_x86_fsave(env, fpstate_addr, 1);
fpstate->status = fpstate->sw;
magic = 0xffff;
err |= __put_user(magic, &fpstate->magic);
- err |= __put_user(fpstate, &sc->fpstate);
+ err |= __put_user(fpstate_addr, &sc->fpstate);
/* non-iBCS2 extensions.. */
err |= __put_user(mask, &sc->oldmask);
*/
static inline abi_ulong
-get_sigframe(struct emulated_sigaction *ka, CPUX86State *env, size_t frame_size)
+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.sa_flags & TARGET_SA_ONSTACK) {
+ 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.sa_flags & TARGET_SA_RESTORER) &&
- ka->sa.sa_restorer) {
- esp = (unsigned long) ka->sa.sa_restorer;
+ !(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 emulated_sigaction *ka,
+static void setup_frame(int sig, struct target_sigaction *ka,
target_sigset_t *set, CPUX86State *env)
{
abi_ulong frame_addr;
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
goto give_sigsegv;
- err |= __put_user((/*current->exec_domain
- && current->exec_domain->signal_invmap
- && sig < 32
- ? current->exec_domain->signal_invmap[sig]
- : */ sig),
+ 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]);
+ setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0],
+ frame_addr + offsetof(struct sigframe, fpstate));
if (err)
goto give_sigsegv;
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
- if (ka->sa.sa_flags & TARGET_SA_RESTORER) {
- err |= __put_user(ka->sa.sa_restorer, &frame->pretcode);
+ if (ka->sa_flags & TARGET_SA_RESTORER) {
+ err |= __put_user(ka->sa_restorer, &frame->pretcode);
} else {
uint16_t val16;
- err |= __put_user(frame->retcode, &frame->pretcode);
+ 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));
goto give_sigsegv;
/* Set up registers for signal handler */
- env->regs[R_ESP] = h2g(frame);
- env->eip = (unsigned long) ka->sa._sa_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);
give_sigsegv:
unlock_user_struct(frame, frame_addr, 1);
if (sig == TARGET_SIGSEGV)
- ka->sa._sa_handler = TARGET_SIG_DFL;
+ 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 emulated_sigaction *ka,
+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;
+ abi_ulong frame_addr, addr;
struct rt_sigframe *frame;
int i, err = 0;
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
goto give_sigsegv;
- err |= __put_user((/*current->exec_domain
- && current->exec_domain->signal_invmap
- && sig < 32
- ? current->exec_domain->signal_invmap[sig]
- : */sig),
+ err |= __put_user(current_exec_domain_sig(sig),
&frame->sig);
- err |= __put_user((abi_ulong)&frame->info, &frame->pinfo);
- err |= __put_user((abi_ulong)&frame->uc, &frame->puc);
+ 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;
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]);
+ 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.sa_flags & TARGET_SA_RESTORER) {
- err |= __put_user(ka->sa.sa_restorer, &frame->pretcode);
+ if (ka->sa_flags & TARGET_SA_RESTORER) {
+ err |= __put_user(ka->sa_restorer, &frame->pretcode);
} else {
uint16_t val16;
-
- err |= __put_user(frame->retcode, &frame->pretcode);
+ 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));
goto give_sigsegv;
/* Set up registers for signal handler */
- env->regs[R_ESP] = (unsigned long) frame;
- env->eip = (unsigned long) ka->sa._sa_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);
give_sigsegv:
unlock_user_struct(frame, frame_addr, 1);
if (sig == TARGET_SIGSEGV)
- ka->sa._sa_handler = TARGET_SIG_DFL;
+ ka->_sa_handler = TARGET_SIG_DFL;
force_sig(TARGET_SIGSEGV /* , current */);
}
restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax)
{
unsigned int err = 0;
-
- cpu_x86_load_seg(env, R_GS, lduw(&sc->gs));
- cpu_x86_load_seg(env, R_FS, lduw(&sc->fs));
- cpu_x86_load_seg(env, R_ES, lduw(&sc->es));
- cpu_x86_load_seg(env, R_DS, lduw(&sc->ds));
-
- env->regs[R_EDI] = ldl(&sc->edi);
- env->regs[R_ESI] = ldl(&sc->esi);
- env->regs[R_EBP] = ldl(&sc->ebp);
- env->regs[R_ESP] = ldl(&sc->esp);
- env->regs[R_EBX] = ldl(&sc->ebx);
- env->regs[R_EDX] = ldl(&sc->edx);
- env->regs[R_ECX] = ldl(&sc->ecx);
- env->eip = ldl(&sc->eip);
+ 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);
- {
- unsigned int tmpflags;
- tmpflags = ldl(&sc->eflags);
- env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5);
- // regs->orig_eax = -1; /* disable syscall checks */
- }
+ tmpflags = tswapl(sc->eflags);
+ env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5);
+ // regs->orig_eax = -1; /* disable syscall checks */
- {
- struct _fpstate * buf;
- buf = (void *)ldl(&sc->fpstate);
- if (buf) {
-#if 0
- if (verify_area(VERIFY_READ, buf, sizeof(*buf)))
- goto badframe;
-#endif
- cpu_x86_frstor(env, (void *)buf, 1);
- }
+ 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 = ldl(&sc->eax);
+ *peax = tswapl(sc->eax);
return err;
-#if 0
badframe:
return 1;
-#endif
}
long do_sigreturn(CPUX86State *env)
long do_rt_sigreturn(CPUX86State *env)
{
- struct rt_sigframe *frame = (struct rt_sigframe *)g2h(env->regs[R_ESP] - 4);
+ abi_ulong frame_addr;
+ struct rt_sigframe *frame;
sigset_t set;
int eax;
-#if 0
- if (verify_area(VERIFY_READ, frame, sizeof(*frame)))
- goto badframe;
-#endif
+ 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(h2g(&frame->uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
+ 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:
- force_sig(TARGET_SIGSEGV);
+ unlock_user_struct(frame, frame_addr, 0);
+ force_sig(TARGET_SIGSEGV);
return 0;
}
abi_ulong fault_address;
};
-struct target_ucontext {
+struct target_ucontext_v1 {
abi_ulong tuc_flags;
abi_ulong tuc_link;
target_stack_t tuc_stack;
target_sigset_t tuc_sigmask; /* mask last for extensibility */
};
-struct sigframe
+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 rt_sigframe
+struct sigframe_v2
+{
+ struct target_ucontext_v2 uc;
+ abi_ulong retcode;
+};
+
+struct rt_sigframe_v1
{
- struct target_siginfo *pinfo;
- void *puc;
+ abi_ulong pinfo;
+ abi_ulong puc;
struct target_siginfo info;
- struct target_ucontext uc;
+ 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 __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)
return 1;
}
-static int
+static void
setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
- CPUState *env, unsigned long mask)
+ CPUState *env, abi_ulong mask)
{
- 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);
+ __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_error(cpsr_read(env), &sc->arm_cpsr, err);
+ __put_user(cpsr_read(env), &sc->arm_cpsr);
#endif
- __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;
+ __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 emulated_sigaction *ka, CPUState *regs, int framesize)
+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.sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp))
+ 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
}
static int
-setup_return(CPUState *env, struct emulated_sigaction *ka,
- abi_ulong *rc, void *frame, int usig)
+setup_return(CPUState *env, struct target_sigaction *ka,
+ abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr)
{
- abi_ulong handler = (abi_ulong)ka->sa._sa_handler;
+ abi_ulong handler = ka->_sa_handler;
abi_ulong retcode;
- int thumb = 0;
-#if defined(TARGET_CONFIG_CPU_32)
-#if 0
- abi_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 */
+ int thumb = handler & 1;
- if (ka->sa.sa_flags & TARGET_SA_RESTORER) {
- retcode = (abi_ulong)ka->sa.sa_restorer;
+ if (ka->sa_flags & TARGET_SA_RESTORER) {
+ retcode = ka->sa_restorer;
} else {
unsigned int idx = thumb;
- if (ka->sa.sa_flags & TARGET_SA_SIGINFO)
+ if (ka->sa_flags & TARGET_SA_SIGINFO)
idx += 2;
if (__put_user(retcodes[idx], rc))
flush_icache_range((abi_ulong)rc,
(abi_ulong)(rc + 1));
#endif
- retcode = ((abi_ulong)rc) + thumb;
+ retcode = rc_addr + thumb;
}
env->regs[0] = usig;
- env->regs[13] = h2g(frame);
+ 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
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(int usig, struct emulated_sigaction *ka,
- target_sigset_t *set, CPUState *regs)
+static void setup_frame_v1(int usig, struct target_sigaction *ka,
+ target_sigset_t *set, CPUState *regs)
{
- struct sigframe *frame;
+ struct sigframe_v1 *frame;
abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
- int i, err = 0;
+ int i;
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
return;
- err |= setup_sigcontext(&frame->sc, /*&frame->fpstate,*/ regs, set->sig[0]);
+ 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;
}
- if (err == 0)
- err = setup_return(regs, ka, &frame->retcode, frame, usig);
+ setup_return(regs, ka, &frame->retcode, frame_addr, usig,
+ frame_addr + offsetof(struct sigframe_v1, retcode));
end:
unlock_user_struct(frame, frame_addr, 1);
- // return err;
+}
+
+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(int usig, struct emulated_sigaction *ka,
- target_siginfo_t *info,
- target_sigset_t *set, CPUState *env)
+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 *frame;
+ struct rt_sigframe_v1 *frame;
abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
struct target_sigaltstack stack;
- int i, err = 0;
+ int i;
+ abi_ulong info_addr, uc_addr;
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
return /* 1 */;
- __put_user_error(&frame->info, (abi_ulong *)&frame->pinfo, err);
- __put_user_error(&frame->uc, (abi_ulong *)&frame->puc, err);
- err |= copy_siginfo_to_user(&frame->info, info);
+ 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, tuc_mcontext));
+ 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(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
- err |= setup_sigcontext(&frame->uc.tuc_mcontext, /*&frame->fpstate,*/
- env, set->sig[0]);
+ 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;
}
- 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] = (abi_ulong)frame->pinfo;
- env->regs[2] = (abi_ulong)frame->puc;
- }
+ 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);
+}
- // return err;
+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
__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);
+ cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC);
#endif
err |= !valid_user_regs(env);
return err;
}
-long do_sigreturn(CPUState *env)
+static long do_sigreturn_v1(CPUState *env)
{
- struct sigframe *frame;
+ abi_ulong frame_addr;
+ struct sigframe_v1 *frame;
target_sigset_t set;
sigset_t host_set;
int i;
if (env->regs[13] & 7)
goto badframe;
- frame = (struct sigframe *)g2h(env->regs[13]);
+ frame_addr = env->regs[13];
+ if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
+ goto badframe;
-#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 (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_rt_sigreturn(CPUState *env)
+long do_sigreturn(CPUState *env)
{
- struct rt_sigframe *frame;
+ 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;
/*
if (env->regs[13] & 7)
goto badframe;
- frame = (struct rt_sigframe *)env->regs[13];
+ frame_addr = env->regs[13];
+ if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
+ goto badframe;
-#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(h2g(&frame->uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
+ if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
goto badframe;
#if 0
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
struct target_signal_frame {
struct sparc_stackf ss;
__siginfo_t info;
- qemu_siginfo_fpu_t *fpu_save;
+ 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 */
siginfo_t info;
abi_ulong regs[20];
sigset_t mask;
- qemu_siginfo_fpu_t *fpu_save;
+ abi_ulong fpu_save;
unsigned int insns[2];
stack_t stack;
unsigned int extra_size; /* Should be 0 */
#define UREG_FP UREG_I6
#define UREG_SP UREG_O6
-static inline abi_ulong get_sigframe(struct emulated_sigaction *sa,
+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.sa_flags & TARGET_SA_ONSTACK) {
+ 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;
#endif
#define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7)))
-static void setup_frame(int sig, struct emulated_sigaction *ka,
+static void setup_frame(int sig, struct target_sigaction *ka,
target_sigset_t *set, CPUState *env)
{
abi_ulong sf_addr;
offsetof(struct target_signal_frame, info);
/* 4. signal handler */
- env->pc = ka->sa._sa_handler;
+ env->pc = ka->_sa_handler;
env->npc = (env->pc + 4);
/* 5. return to kernel instructions */
- if (ka->sa.sa_restorer)
- env->regwptr[UREG_I7] = ka->sa.sa_restorer;
+ if (ka->sa_restorer)
+ env->regwptr[UREG_I7] = ka->sa_restorer;
else {
uint32_t val32;
}
-static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
+static void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUState *env)
{
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;
+ abi_ulong fpu_save_addr;
int err, i;
- sf = (struct target_signal_frame *)g2h(env->regwptr[UREG_FP]);
+ 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]);
//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)
+ if (sf_addr & 3)
goto segv_and_exit;
err = __get_user(pc, &sf->info.si_regs.pc);
err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]);
}
- err |= __get_user(fpu_save, (abi_ulong *)&sf->fpu_save);
+ err |= __get_user(fpu_save_addr, &sf->fpu_save);
//if (fpu_save)
// err |= restore_fpu_state(env, fpu_save);
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 -ENOSYS;
+ return -TARGET_ENOSYS;
}
#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
# warning signal handling not implemented
-static void setup_frame(int sig, struct emulated_sigaction *ka,
+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 emulated_sigaction *ka,
+static void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUState *env)
{
long do_sigreturn(CPUState *env)
{
fprintf(stderr, "do_sigreturn: not implemented\n");
- return -ENOSYS;
+ return -TARGET_ENOSYS;
}
long do_rt_sigreturn(CPUState *env)
{
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
- return -ENOSYS;
+ return -TARGET_ENOSYS;
}
#elif defined(TARGET_ABI_MIPSN32)
# warning signal handling not implemented
-static void setup_frame(int sig, struct emulated_sigaction *ka,
+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 emulated_sigaction *ka,
+static void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUState *env)
{
long do_sigreturn(CPUState *env)
{
fprintf(stderr, "do_sigreturn: not implemented\n");
- return -ENOSYS;
+ return -TARGET_ENOSYS;
}
long do_rt_sigreturn(CPUState *env)
{
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
- return -ENOSYS;
+ return -TARGET_ENOSYS;
}
#elif defined(TARGET_ABI_MIPSO32)
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 = 0;
- err |= __put_user(regs->PC[regs->current_tc], &sc->sc_pc);
+ err |= __put_user(regs->active_tc.PC, &sc->sc_pc);
-#define save_gp_reg(i) do { \
- err |= __put_user(regs->gpr[i][regs->current_tc], &sc->sc_regs[i]); \
+#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(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);
+ 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
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);
+ 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->gpr[i][regs->current_tc], &sc->sc_regs[i]); \
+ 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);
* Determine which stack to use..
*/
static inline abi_ulong
-get_sigframe(struct emulated_sigaction *ka, CPUState *regs, size_t frame_size)
+get_sigframe(struct target_sigaction *ka, CPUState *regs, size_t frame_size)
{
unsigned long sp;
/* Default to using normal stack */
- sp = regs->gpr[29][regs->current_tc];
+ sp = regs->active_tc.gpr[29];
/*
* FPU emulator may have it's own trampoline active just
sp -= 32;
/* This is the X/Open sanctioned signal stack switching. */
- if ((ka->sa.sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
+ if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
}
}
/* compare linux/arch/mips/kernel/signal.c:setup_frame() */
-static void setup_frame(int sig, struct emulated_sigaction * ka,
+static void setup_frame(int sig, struct target_sigaction * ka,
target_sigset_t *set, CPUState *regs)
{
struct sigframe *frame;
* $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);
+ 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->PC[regs->current_tc] = regs->gpr[25][regs->current_tc] = ka->sa._sa_handler;
+ regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler;
unlock_user_struct(frame, frame_addr, 1);
return;
#if defined(DEBUG_SIGNAL)
fprintf(stderr, "do_sigreturn\n");
#endif
- frame_addr = regs->gpr[29][regs->current_tc];
+ frame_addr = regs->active_tc.gpr[29];
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
goto badframe;
/* Unreached */
#endif
- regs->PC[regs->current_tc] = regs->CP0_EPC;
+ 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 0;
+ return -TARGET_QEMU_ESIGRETURN;
badframe:
force_sig(TARGET_SIGSEGV/*, current*/);
return 0;
}
-static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
+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");
-}
+ struct target_rt_sigframe *frame;
+ abi_ulong frame_addr;
+ int i;
-long do_rt_sigreturn(CPUState *env)
-{
- fprintf(stderr, "do_rt_sigreturn: not implemented\n");
- return -ENOSYS;
-}
+ 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_MICROBLAZE)
+
+struct target_sigcontext {
+ struct target_pt_regs regs; /* needs to be first */
+ uint32_t oldmask;
+};
+
+/* Signal frames. */
+struct target_signal_frame {
+ struct target_sigcontext sc;
+ uint32_t extramask[TARGET_NSIG_WORDS - 1];
+ uint32_t tramp[2];
+};
+
+struct rt_signal_frame {
+ struct siginfo info;
+ struct ucontext uc;
+ uint32_t tramp[2];
+};
+
+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->regs.r14);
+ __put_user(env->regs[15], &sc->regs.r15);
+ __put_user(env->regs[16], &sc->regs.r16);
+ __put_user(env->regs[17], &sc->regs.r17);
+ __put_user(env->regs[18], &sc->regs.r18);
+ __put_user(env->regs[19], &sc->regs.r19);
+ __put_user(env->regs[20], &sc->regs.r20);
+ __put_user(env->regs[21], &sc->regs.r21);
+ __put_user(env->regs[22], &sc->regs.r22);
+ __put_user(env->regs[23], &sc->regs.r23);
+ __put_user(env->regs[24], &sc->regs.r24);
+ __put_user(env->regs[25], &sc->regs.r25);
+ __put_user(env->regs[26], &sc->regs.r26);
+ __put_user(env->regs[27], &sc->regs.r27);
+ __put_user(env->regs[28], &sc->regs.r28);
+ __put_user(env->regs[29], &sc->regs.r29);
+ __put_user(env->regs[30], &sc->regs.r30);
+ __put_user(env->regs[31], &sc->regs.r31);
+ __put_user(env->sregs[SR_PC], &sc->regs.pc);
+}
+
+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->regs.r14);
+ __get_user(env->regs[15], &sc->regs.r15);
+ __get_user(env->regs[16], &sc->regs.r16);
+ __get_user(env->regs[17], &sc->regs.r17);
+ __get_user(env->regs[18], &sc->regs.r18);
+ __get_user(env->regs[19], &sc->regs.r19);
+ __get_user(env->regs[20], &sc->regs.r20);
+ __get_user(env->regs[21], &sc->regs.r21);
+ __get_user(env->regs[22], &sc->regs.r22);
+ __get_user(env->regs[23], &sc->regs.r23);
+ __get_user(env->regs[24], &sc->regs.r24);
+ __get_user(env->regs[25], &sc->regs.r25);
+ __get_user(env->regs[26], &sc->regs.r26);
+ __get_user(env->regs[27], &sc->regs.r27);
+ __get_user(env->regs[28], &sc->regs.r28);
+ __get_user(env->regs[29], &sc->regs.r29);
+ __get_user(env->regs[30], &sc->regs.r30);
+ __get_user(env->regs[31], &sc->regs.r31);
+ __get_user(env->sregs[SR_PC], &sc->regs.pc);
+}
+
+static abi_ulong get_sigframe(struct target_sigaction *ka,
+ CPUState *env, int frame_size)
+{
+ abi_ulong sp = env->regs[1];
+
+ if ((ka->sa_flags & SA_ONSTACK) != 0 && !on_sig_stack(sp))
+ sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
+
+ return ((sp - frame_size) & -8UL);
+}
+
+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(ka, env, sizeof *frame);
+ if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
+ goto badframe;
+
+ /* 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);
+
+ /* Set up to return from userspace. If provided, use a stub
+ already in userspace. */
+ /* minus 8 is offset to cater for "rtsd r15,8" offset */
+ if (ka->sa_flags & TARGET_SA_RESTORER) {
+ env->regs[15] = ((unsigned long)ka->sa_restorer)-8;
+ } else {
+ uint32_t t;
+ /* Note, these encodings are _big endian_! */
+ /* addi r12, r0, __NR_sigreturn */
+ t = 0x31800000UL | TARGET_NR_sigreturn;
+ err |= __put_user(t, frame->tramp + 0);
+ /* brki r14, 0x8 */
+ t = 0xb9cc0008UL;
+ err |= __put_user(t, frame->tramp + 1);
+
+ /* Return from sighandler will jump to the tramp.
+ Negative 8 offset because return is rtsd r15, 8 */
+ env->regs[15] = ((unsigned long)frame->tramp) - 8;
+ }
+
+ if (err)
+ goto badframe;
+
+ /* Set up registers for signal handler */
+ env->regs[1] = (unsigned long) frame;
+ /* Signal handler args: */
+ env->regs[5] = sig; /* Arg 0: signum */
+ env->regs[6] = (unsigned long) &frame->sc; /* arg 1: sigcontext */
+
+ /* Offset of 4 to handle microblaze rtid r14, 0 */
+ env->sregs[SR_PC] = (unsigned long)ka->_sa_handler;
+
+ 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, "Microblaze 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);
+ /* We got here through a sigreturn syscall, our path back is via an
+ rtb insn so setup r14 for that. */
+ env->regs[14] = env->sregs[SR_PC];
+
+ 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, "Microblaze do_rt_sigreturn: not implemented\n");
+ return -TARGET_ENOSYS;
+}
+
+#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;
+}
+
+#elif defined(TARGET_PPC) && !defined(TARGET_PPC64)
+
+/* FIXME: Many of the structures are defined for both PPC and PPC64, but
+ the signal handling is different enough that we haven't implemented
+ support for PPC64 yet. Hence the restriction above.
+
+ There are various #if'd blocks for code for TARGET_PPC64. These
+ blocks should go away so that we can successfully run 32-bit and
+ 64-bit binaries on a QEMU configured for PPC64. */
+
+/* Size of dummy stack frame allocated when calling signal handler.
+ See arch/powerpc/include/asm/ptrace.h. */
+#if defined(TARGET_PPC64)
+#define SIGNAL_FRAMESIZE 128
+#else
+#define SIGNAL_FRAMESIZE 64
+#endif
+
+/* See arch/powerpc/include/asm/sigcontext.h. */
+struct target_sigcontext {
+ target_ulong _unused[4];
+ int32_t signal;
+#if defined(TARGET_PPC64)
+ int32_t pad0;
+#endif
+ target_ulong handler;
+ target_ulong oldmask;
+ target_ulong regs; /* struct pt_regs __user * */
+ /* TODO: PPC64 includes extra bits here. */
+};
+
+/* Indices for target_mcontext.mc_gregs, below.
+ See arch/powerpc/include/asm/ptrace.h for details. */
+enum {
+ TARGET_PT_R0 = 0,
+ TARGET_PT_R1 = 1,
+ TARGET_PT_R2 = 2,
+ TARGET_PT_R3 = 3,
+ TARGET_PT_R4 = 4,
+ TARGET_PT_R5 = 5,
+ TARGET_PT_R6 = 6,
+ TARGET_PT_R7 = 7,
+ TARGET_PT_R8 = 8,
+ TARGET_PT_R9 = 9,
+ TARGET_PT_R10 = 10,
+ TARGET_PT_R11 = 11,
+ TARGET_PT_R12 = 12,
+ TARGET_PT_R13 = 13,
+ TARGET_PT_R14 = 14,
+ TARGET_PT_R15 = 15,
+ TARGET_PT_R16 = 16,
+ TARGET_PT_R17 = 17,
+ TARGET_PT_R18 = 18,
+ TARGET_PT_R19 = 19,
+ TARGET_PT_R20 = 20,
+ TARGET_PT_R21 = 21,
+ TARGET_PT_R22 = 22,
+ TARGET_PT_R23 = 23,
+ TARGET_PT_R24 = 24,
+ TARGET_PT_R25 = 25,
+ TARGET_PT_R26 = 26,
+ TARGET_PT_R27 = 27,
+ TARGET_PT_R28 = 28,
+ TARGET_PT_R29 = 29,
+ TARGET_PT_R30 = 30,
+ TARGET_PT_R31 = 31,
+ TARGET_PT_NIP = 32,
+ TARGET_PT_MSR = 33,
+ TARGET_PT_ORIG_R3 = 34,
+ TARGET_PT_CTR = 35,
+ TARGET_PT_LNK = 36,
+ TARGET_PT_XER = 37,
+ TARGET_PT_CCR = 38,
+ /* Yes, there are two registers with #39. One is 64-bit only. */
+ TARGET_PT_MQ = 39,
+ TARGET_PT_SOFTE = 39,
+ TARGET_PT_TRAP = 40,
+ TARGET_PT_DAR = 41,
+ TARGET_PT_DSISR = 42,
+ TARGET_PT_RESULT = 43,
+ TARGET_PT_REGS_COUNT = 44
+};
+
+/* See arch/powerpc/include/asm/ucontext.h. Only used for 32-bit PPC;
+ on 64-bit PPC, sigcontext and mcontext are one and the same. */
+struct target_mcontext {
+ target_ulong mc_gregs[48];
+ /* Includes fpscr. */
+ uint64_t mc_fregs[33];
+ target_ulong mc_pad[2];
+ /* We need to handle Altivec and SPE at the same time, which no
+ kernel needs to do. Fortunately, the kernel defines this bit to
+ be Altivec-register-large all the time, rather than trying to
+ twiddle it based on the specific platform. */
+ union {
+ /* SPE vector registers. One extra for SPEFSCR. */
+ uint32_t spe[33];
+ /* Altivec vector registers. The packing of VSCR and VRSAVE
+ varies depending on whether we're PPC64 or not: PPC64 splits
+ them apart; PPC32 stuffs them together. */
+#if defined(TARGET_PPC64)
+#define NVRREG 34
+#else
+#define NVRREG 33
+#endif
+ ppc_avr_t altivec[NVRREG];
+#undef NVRREG
+ } mc_vregs __attribute__((__aligned__(16)));
+};
+
+struct target_ucontext {
+ target_ulong uc_flags;
+ target_ulong uc_link; /* struct ucontext __user * */
+ struct target_sigaltstack uc_stack;
+#if !defined(TARGET_PPC64)
+ int32_t uc_pad[7];
+ target_ulong uc_regs; /* struct mcontext __user *
+ points to uc_mcontext field */
+#endif
+ target_sigset_t uc_sigmask;
+#if defined(TARGET_PPC64)
+ target_sigset_t unused[15]; /* Allow for uc_sigmask growth */
+ struct target_sigcontext uc_mcontext;
+#else
+ int32_t uc_maskext[30];
+ int32_t uc_pad2[3];
+ struct target_mcontext uc_mcontext;
+#endif
+};
+
+/* See arch/powerpc/kernel/signal_32.c. */
+struct target_sigframe {
+ struct target_sigcontext sctx;
+ struct target_mcontext mctx;
+ int32_t abigap[56];
+};
+
+struct target_rt_sigframe {
+ struct target_siginfo info;
+ struct target_ucontext uc;
+ int32_t abigap[56];
+};
+
+/* We use the mc_pad field for the signal return trampoline. */
+#define tramp mc_pad
+
+/* See arch/powerpc/kernel/signal.c. */
+static target_ulong get_sigframe(struct target_sigaction *ka,
+ CPUState *env,
+ int frame_size)
+{
+ target_ulong oldsp, newsp;
+
+ oldsp = env->gpr[1];
+
+ if ((ka->sa_flags & TARGET_SA_ONSTACK) &&
+ (sas_ss_flags(oldsp))) {
+ oldsp = (target_sigaltstack_used.ss_sp
+ + target_sigaltstack_used.ss_size);
+ }
+
+ newsp = (oldsp - frame_size) & ~0xFUL;
+
+ return newsp;
+}
+
+static int save_user_regs(CPUState *env, struct target_mcontext *frame,
+ int sigret)
+{
+ target_ulong msr = env->msr;
+ int i;
+ target_ulong ccr = 0;
+
+ /* In general, the kernel attempts to be intelligent about what it
+ needs to save for Altivec/FP/SPE registers. We don't care that
+ much, so we just go ahead and save everything. */
+
+ /* Save general registers. */
+ for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
+ if (__put_user(env->gpr[i], &frame->mc_gregs[i])) {
+ return 1;
+ }
+ }
+ if (__put_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP])
+ || __put_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR])
+ || __put_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK])
+ || __put_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]))
+ return 1;
+
+ for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
+ ccr |= env->crf[i] << (32 - ((i + 1) * 4));
+ }
+ if (__put_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]))
+ return 1;
+
+ /* Save Altivec registers if necessary. */
+ if (env->insns_flags & PPC_ALTIVEC) {
+ for (i = 0; i < ARRAY_SIZE(env->avr); i++) {
+ ppc_avr_t *avr = &env->avr[i];
+ ppc_avr_t *vreg = &frame->mc_vregs.altivec[i];
+
+ if (__put_user(avr->u64[0], &vreg->u64[0]) ||
+ __put_user(avr->u64[1], &vreg->u64[1])) {
+ return 1;
+ }
+ }
+ /* Set MSR_VR in the saved MSR value to indicate that
+ frame->mc_vregs contains valid data. */
+ msr |= MSR_VR;
+ if (__put_user((uint32_t)env->spr[SPR_VRSAVE],
+ &frame->mc_vregs.altivec[32].u32[3]))
+ return 1;
+ }
+
+ /* Save floating point registers. */
+ if (env->insns_flags & PPC_FLOAT) {
+ for (i = 0; i < ARRAY_SIZE(env->fpr); i++) {
+ if (__put_user(env->fpr[i], &frame->mc_fregs[i])) {
+ return 1;
+ }
+ }
+ if (__put_user((uint64_t) env->fpscr, &frame->mc_fregs[32]))
+ return 1;
+ }
+
+ /* Save SPE registers. The kernel only saves the high half. */
+ if (env->insns_flags & PPC_SPE) {
+#if defined(TARGET_PPC64)
+ for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
+ if (__put_user(env->gpr[i] >> 32, &frame->mc_vregs.spe[i])) {
+ return 1;
+ }
+ }
+#else
+ for (i = 0; i < ARRAY_SIZE(env->gprh); i++) {
+ if (__put_user(env->gprh[i], &frame->mc_vregs.spe[i])) {
+ return 1;
+ }
+ }
+#endif
+ /* Set MSR_SPE in the saved MSR value to indicate that
+ frame->mc_vregs contains valid data. */
+ msr |= MSR_SPE;
+ if (__put_user(env->spe_fscr, &frame->mc_vregs.spe[32]))
+ return 1;
+ }
+
+ /* Store MSR. */
+ if (__put_user(msr, &frame->mc_gregs[TARGET_PT_MSR]))
+ return 1;
+
+ /* Set up the sigreturn trampoline: li r0,sigret; sc. */
+ if (sigret) {
+ if (__put_user(0x38000000UL | sigret, &frame->tramp[0]) ||
+ __put_user(0x44000002UL, &frame->tramp[1])) {
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+static int restore_user_regs(CPUState *env,
+ struct target_mcontext *frame, int sig)
+{
+ target_ulong save_r2 = 0;
+ target_ulong msr;
+ target_ulong ccr;
+
+ int i;
+
+ if (!sig) {
+ save_r2 = env->gpr[2];
+ }
+
+ /* Restore general registers. */
+ for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
+ if (__get_user(env->gpr[i], &frame->mc_gregs[i])) {
+ return 1;
+ }
+ }
+ if (__get_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP])
+ || __get_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR])
+ || __get_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK])
+ || __get_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]))
+ return 1;
+ if (__get_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]))
+ return 1;
+
+ for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
+ env->crf[i] = (ccr >> (32 - ((i + 1) * 4))) & 0xf;
+ }
+
+ if (!sig) {
+ env->gpr[2] = save_r2;
+ }
+ /* Restore MSR. */
+ if (__get_user(msr, &frame->mc_gregs[TARGET_PT_MSR]))
+ return 1;
+
+ /* If doing signal return, restore the previous little-endian mode. */
+ if (sig)
+ env->msr = (env->msr & ~MSR_LE) | (msr & MSR_LE);
+
+ /* Restore Altivec registers if necessary. */
+ if (env->insns_flags & PPC_ALTIVEC) {
+ for (i = 0; i < ARRAY_SIZE(env->avr); i++) {
+ ppc_avr_t *avr = &env->avr[i];
+ ppc_avr_t *vreg = &frame->mc_vregs.altivec[i];
+
+ if (__get_user(avr->u64[0], &vreg->u64[0]) ||
+ __get_user(avr->u64[1], &vreg->u64[1])) {
+ return 1;
+ }
+ }
+ /* Set MSR_VEC in the saved MSR value to indicate that
+ frame->mc_vregs contains valid data. */
+ if (__get_user(env->spr[SPR_VRSAVE],
+ (target_ulong *)(&frame->mc_vregs.altivec[32].u32[3])))
+ return 1;
+ }
+
+ /* Restore floating point registers. */
+ if (env->insns_flags & PPC_FLOAT) {
+ uint64_t fpscr;
+ for (i = 0; i < ARRAY_SIZE(env->fpr); i++) {
+ if (__get_user(env->fpr[i], &frame->mc_fregs[i])) {
+ return 1;
+ }
+ }
+ if (__get_user(fpscr, &frame->mc_fregs[32]))
+ return 1;
+ env->fpscr = (uint32_t) fpscr;
+ }
+
+ /* Save SPE registers. The kernel only saves the high half. */
+ if (env->insns_flags & PPC_SPE) {
+#if defined(TARGET_PPC64)
+ for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
+ uint32_t hi;
+
+ if (__get_user(hi, &frame->mc_vregs.spe[i])) {
+ return 1;
+ }
+ env->gpr[i] = ((uint64_t)hi << 32) | ((uint32_t) env->gpr[i]);
+ }
+#else
+ for (i = 0; i < ARRAY_SIZE(env->gprh); i++) {
+ if (__get_user(env->gprh[i], &frame->mc_vregs.spe[i])) {
+ return 1;
+ }
+ }
+#endif
+ if (__get_user(env->spe_fscr, &frame->mc_vregs.spe[32]))
+ return 1;
+ }
+
+ return 0;
+}
+
+static void setup_frame(int sig, struct target_sigaction *ka,
+ target_sigset_t *set, CPUState *env)
+{
+ struct target_sigframe *frame;
+ struct target_sigcontext *sc;
+ target_ulong frame_addr, newsp;
+ int err = 0;
+ int signal;
+
+ frame_addr = get_sigframe(ka, env, sizeof(*frame));
+ if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
+ goto sigsegv;
+ sc = &frame->sctx;
+
+ signal = current_exec_domain_sig(sig);
+
+ err |= __put_user(h2g(ka->_sa_handler), &sc->handler);
+ err |= __put_user(set->sig[0], &sc->oldmask);
+#if defined(TARGET_PPC64)
+ err |= __put_user(set->sig[0] >> 32, &sc->_unused[3]);
+#else
+ err |= __put_user(set->sig[1], &sc->_unused[3]);
+#endif
+ err |= __put_user(h2g(&frame->mctx), &sc->regs);
+ err |= __put_user(sig, &sc->signal);
+
+ /* Save user regs. */
+ err |= save_user_regs(env, &frame->mctx, TARGET_NR_sigreturn);
+
+ /* The kernel checks for the presence of a VDSO here. We don't
+ emulate a vdso, so use a sigreturn system call. */
+ env->lr = (target_ulong) h2g(frame->mctx.tramp);
+
+ /* Turn off all fp exceptions. */
+ env->fpscr = 0;
+
+ /* Create a stack frame for the caller of the handler. */
+ newsp = frame_addr - SIGNAL_FRAMESIZE;
+ err |= __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp);
+
+ if (err)
+ goto sigsegv;
+
+ /* Set up registers for signal handler. */
+ env->gpr[1] = newsp;
+ env->gpr[3] = signal;
+ env->gpr[4] = (target_ulong) h2g(sc);
+ env->nip = (target_ulong) ka->_sa_handler;
+ /* Signal handlers are entered in big-endian mode. */
+ env->msr &= ~MSR_LE;
+
+ unlock_user_struct(frame, frame_addr, 1);
+ return;
+
+sigsegv:
+ unlock_user_struct(frame, frame_addr, 1);
+ if (logfile)
+ fprintf (logfile, "segfaulting from setup_frame\n");
+ force_sig(SIGSEGV);
+}
+
+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 *rt_sf;
+ struct target_mcontext *frame;
+ target_ulong rt_sf_addr, newsp = 0;
+ int i, err = 0;
+ int signal;
+
+ rt_sf_addr = get_sigframe(ka, env, sizeof(*rt_sf));
+ if (!lock_user_struct(VERIFY_WRITE, rt_sf, rt_sf_addr, 1))
+ goto sigsegv;
+
+ signal = current_exec_domain_sig(sig);
+
+ err |= copy_siginfo_to_user(&rt_sf->info, info);
+
+ err |= __put_user(0, &rt_sf->uc.uc_flags);
+ err |= __put_user(0, &rt_sf->uc.uc_link);
+ err |= __put_user((target_ulong)target_sigaltstack_used.ss_sp,
+ &rt_sf->uc.uc_stack.ss_sp);
+ err |= __put_user(sas_ss_flags(env->gpr[1]),
+ &rt_sf->uc.uc_stack.ss_flags);
+ err |= __put_user(target_sigaltstack_used.ss_size,
+ &rt_sf->uc.uc_stack.ss_size);
+ err |= __put_user(h2g (&rt_sf->uc.uc_mcontext),
+ &rt_sf->uc.uc_regs);
+ for(i = 0; i < TARGET_NSIG_WORDS; i++) {
+ err |= __put_user(set->sig[i], &rt_sf->uc.uc_sigmask.sig[i]);
+ }
+
+ frame = &rt_sf->uc.uc_mcontext;
+ err |= save_user_regs(env, frame, TARGET_NR_rt_sigreturn);
+
+ /* The kernel checks for the presence of a VDSO here. We don't
+ emulate a vdso, so use a sigreturn system call. */
+ env->lr = (target_ulong) h2g(frame->tramp);
+
+ /* Turn off all fp exceptions. */
+ env->fpscr = 0;
+
+ /* Create a stack frame for the caller of the handler. */
+ newsp = rt_sf_addr - (SIGNAL_FRAMESIZE + 16);
+ err |= __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp);
+
+ if (err)
+ goto sigsegv;
+
+ /* Set up registers for signal handler. */
+ env->gpr[1] = newsp;
+ env->gpr[3] = (target_ulong) signal;
+ env->gpr[4] = (target_ulong) h2g(&rt_sf->info);
+ env->gpr[5] = (target_ulong) h2g(&rt_sf->uc);
+ env->gpr[6] = (target_ulong) h2g(rt_sf);
+ env->nip = (target_ulong) ka->_sa_handler;
+ /* Signal handlers are entered in big-endian mode. */
+ env->msr &= ~MSR_LE;
+
+ unlock_user_struct(rt_sf, rt_sf_addr, 1);
+ return;
+
+sigsegv:
+ unlock_user_struct(rt_sf, rt_sf_addr, 1);
+ if (logfile)
+ fprintf (logfile, "segfaulting from setup_rt_frame\n");
+ force_sig(SIGSEGV);
+
+}
+
+long do_sigreturn(CPUState *env)
+{
+ struct target_sigcontext *sc = NULL;
+ struct target_mcontext *sr = NULL;
+ target_ulong sr_addr, sc_addr;
+ sigset_t blocked;
+ target_sigset_t set;
+
+ sc_addr = env->gpr[1] + SIGNAL_FRAMESIZE;
+ if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1))
+ goto sigsegv;
+
+#if defined(TARGET_PPC64)
+ set.sig[0] = sc->oldmask + ((long)(sc->_unused[3]) << 32);
+#else
+ if(__get_user(set.sig[0], &sc->oldmask) ||
+ __get_user(set.sig[1], &sc->_unused[3]))
+ goto sigsegv;
+#endif
+ target_to_host_sigset_internal(&blocked, &set);
+ sigprocmask(SIG_SETMASK, &blocked, NULL);
+
+ if (__get_user(sr_addr, &sc->regs))
+ goto sigsegv;
+ if (!lock_user_struct(VERIFY_READ, sr, sr_addr, 1))
+ goto sigsegv;
+ if (restore_user_regs(env, sr, 1))
+ goto sigsegv;
+
+ unlock_user_struct(sr, sr_addr, 1);
+ unlock_user_struct(sc, sc_addr, 1);
+ return -TARGET_QEMU_ESIGRETURN;
+
+sigsegv:
+ unlock_user_struct(sr, sr_addr, 1);
+ unlock_user_struct(sc, sc_addr, 1);
+ if (logfile)
+ fprintf (logfile, "segfaulting from do_sigreturn\n");
+ force_sig(SIGSEGV);
+ return 0;
+}
+
+/* See arch/powerpc/kernel/signal_32.c. */
+static int do_setcontext(struct target_ucontext *ucp, CPUState *env, int sig)
+{
+ struct target_mcontext *mcp;
+ target_ulong mcp_addr;
+ sigset_t blocked;
+ target_sigset_t set;
+
+ if (copy_from_user(&set, h2g(ucp) + offsetof(struct target_ucontext, uc_sigmask),
+ sizeof (set)))
+ return 1;
+
+#if defined(TARGET_PPC64)
+ fprintf (stderr, "do_setcontext: not implemented\n");
+ return 0;
+#else
+ if (__get_user(mcp_addr, &ucp->uc_regs))
+ return 1;
+
+ if (!lock_user_struct(VERIFY_READ, mcp, mcp_addr, 1))
+ return 1;
+
+ target_to_host_sigset_internal(&blocked, &set);
+ sigprocmask(SIG_SETMASK, &blocked, NULL);
+ if (restore_user_regs(env, mcp, sig))
+ goto sigsegv;
+
+ unlock_user_struct(mcp, mcp_addr, 1);
+ return 0;
+
+sigsegv:
+ unlock_user_struct(mcp, mcp_addr, 1);
+ return 1;
+#endif
+}
+
+long do_rt_sigreturn(CPUState *env)
+{
+ struct target_rt_sigframe *rt_sf = NULL;
+ target_ulong rt_sf_addr;
+
+ rt_sf_addr = env->gpr[1] + SIGNAL_FRAMESIZE + 16;
+ if (!lock_user_struct(VERIFY_READ, rt_sf, rt_sf_addr, 1))
+ goto sigsegv;
+
+ if (do_setcontext(&rt_sf->uc, env, 1))
+ goto sigsegv;
+
+ do_sigaltstack(rt_sf_addr
+ + offsetof(struct target_rt_sigframe, uc.uc_stack),
+ 0, env->gpr[1]);
+
+ unlock_user_struct(rt_sf, rt_sf_addr, 1);
+ return -TARGET_QEMU_ESIGRETURN;
+
+sigsegv:
+ unlock_user_struct(rt_sf, rt_sf_addr, 1);
+ if (logfile)
+ fprintf (logfile, "segfaulting from do_rt_sigreturn\n");
+ force_sig(SIGSEGV);
+ return 0;
+}
#else
-static void setup_frame(int sig, struct emulated_sigaction *ka,
+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 emulated_sigaction *ka,
+static void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUState *env)
{
long do_sigreturn(CPUState *env)
{
fprintf(stderr, "do_sigreturn: not implemented\n");
- return -ENOSYS;
+ return -TARGET_ENOSYS;
}
long do_rt_sigreturn(CPUState *env)
{
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
- return -ENOSYS;
+ return -TARGET_ENOSYS;
}
#endif
-void process_pending_signals(void *cpu_env)
+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_sigaction *k;
+ struct emulated_sigtable *k;
+ struct target_sigaction *sa;
struct sigqueue *q;
+ TaskState *ts = cpu_env->opaque;
- if (!signal_pending)
+ if (!ts->signal_pending)
return;
- k = sigact_table;
+ /* 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 */
- signal_pending = 0;
+ ts->signal_pending = 0;
return;
handle_signal:
sig = gdb_handlesig (cpu_env, sig);
if (!sig) {
- fprintf (stderr, "Lost signal\n");
- abort();
+ sa = NULL;
+ handler = TARGET_SIG_IGN;
+ } else {
+ sa = &sigact_table[sig - 1];
+ handler = sa->_sa_handler;
}
- 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) {
+ /* 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) {
force_sig(sig);
} else {
/* compute the blocked signals during the handler execution */
- target_to_host_sigset(&set, &k->sa.sa_mask);
+ target_to_host_sigset(&set, &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))
+ if (!(sa->sa_flags & TARGET_SA_NODEFER))
sigaddset(&set, target_to_host_signal(sig));
/* block signals in the handler using Linux */
}
#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);
+ if (sa->sa_flags & TARGET_SA_SIGINFO)
+ setup_rt_frame(sig, sa, &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;
+ 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(q);
+ free_sigqueue(cpu_env, q);
}
projects / qemu / blobdiff