/*
- * Emulation of Linux signal handling
+ * Emulation of Linux signals
*
* Copyright (c) 2003 Fabrice Bellard
*
*/
#include <stdlib.h>
#include <stdio.h>
+#include <string.h>
#include <stdarg.h>
#include <signal.h>
+#include <errno.h>
#include <sys/ucontext.h>
-/* Algorithm strongly inspired from em86 : we queue the signals so
- that we can handle them at precise points in the emulated code. */
+#include "gemu.h"
+
+#include "syscall_defs.h"
+
+#ifdef TARGET_I386
+#include "cpu-i386.h"
+#include "syscall-i386.h"
+#endif
+
+/* signal handling inspired from em86. */
+
+//#define DEBUG_SIGNAL
+
+#define MAX_SIGQUEUE_SIZE 1024
+
+struct sigqueue {
+ struct sigqueue *next;
+ siginfo_t info;
+};
struct emulated_sigaction {
struct target_sigaction sa;
- int nb_pending;
- struct target_siginfo info;
+ 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 emulated_sigaction sigact_table[NSIG];
-int signal_pending;
+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,
+ void *puc);
+
+/* XXX: do it properly */
static inline int host_to_target_signal(int sig)
{
return sig;
return sig;
}
+void host_to_target_sigset(target_sigset_t *d, sigset_t *s)
+{
+ int i;
+ for(i = 0;i < TARGET_NSIG_WORDS; i++) {
+ d->sig[i] = tswapl(((unsigned long *)s)[i]);
+ }
+}
+
+void target_to_host_sigset(sigset_t *d, target_sigset_t *s)
+{
+ int i;
+ for(i = 0;i < TARGET_NSIG_WORDS; i++) {
+ ((unsigned long *)d)[i] = tswapl(s->sig[i]);
+ }
+}
+
+void host_to_target_old_sigset(target_ulong *old_sigset,
+ const sigset_t *sigset)
+{
+ *old_sigset = tswap32(*(unsigned long *)sigset & 0xffffffff);
+}
+
+void target_to_host_old_sigset(sigset_t *sigset,
+ const target_ulong *old_sigset)
+{
+ sigemptyset(sigset);
+ *(unsigned long *)sigset = tswapl(*old_sigset);
+}
+
+/* XXX: finish it */
+void host_to_target_siginfo(target_siginfo_t *tinfo, siginfo_t *info)
+{
+ tinfo->si_signo = tswap32(info->si_signo);
+ tinfo->si_errno = tswap32(info->si_errno);
+ tinfo->si_code = tswap32(info->si_code);
+}
+
+/* XXX: finish it */
+void target_to_host_siginfo(siginfo_t *info, target_siginfo_t *tinfo)
+{
+ info->si_signo = tswap32(tinfo->si_signo);
+ info->si_errno = tswap32(tinfo->si_errno);
+ info->si_code = tswap32(tinfo->si_code);
+}
+
void signal_init(void)
{
struct sigaction act;
act.sa_flags = SA_SIGINFO;
act.sa_sigaction = host_signal_handler;
for(i = 1; i < NSIG; i++) {
- sigaction(i, &sa, NULL);
+ 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++)
+ 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)
+{
+ struct sigqueue *q = first_free;
+ if (!q)
+ return NULL;
+ first_free = q->next;
+ return q;
}
+static inline void free_sigqueue(struct sigqueue *q)
+{
+ q->next = first_free;
+ first_free = q;
+}
+
+static int queue_signal(struct emulated_sigaction *k, int sig, siginfo_t *info)
+{
+ struct sigqueue *q, **pq;
+
+ pq = &k->first;
+ if (!k->pending || sig < TARGET_SIGRTMIN) {
+ /* first signal or non real time signal */
+ q = &k->info;
+ } else {
+ q = alloc_sigqueue();
+ if (!q)
+ return -EAGAIN;
+ while (*pq != NULL)
+ pq = &(*pq)->next;
+ }
+ *pq = q;
+ q->info = *info;
+ q->next = NULL;
+ k->pending = 1;
+ /* signal that a new signal is pending */
+ signal_pending = 1;
+ return 0;
+}
+
+void force_sig(int sig)
+{
+ int host_sig;
+ /* abort execution with signal */
+ host_sig = target_to_host_signal(sig);
+ fprintf(stderr, "gemu: uncaught target signal %d (%s) - exiting\n",
+ sig, strsignal(host_sig));
+ _exit(-host_sig);
+}
+
+
static void host_signal_handler(int host_signum, siginfo_t *info,
void *puc)
{
- struct ucontext *uc = puc;
- int signum;
+ struct emulated_sigaction *k;
+ int sig;
+ target_ulong handler;
+
/* get target signal number */
- signum = host_to_target(host_signum);
- if (signum >= TARGET_NSIG)
+ sig = host_to_target_signal(host_signum);
+ if (sig < 1 || sig > TARGET_NSIG)
return;
- /* we save the old mask */
-
-
+ k = &sigact_table[sig - 1];
+#ifdef DEBUG_SIGNAL
+ fprintf(stderr, "gemu: got signal %d\n", sig);
+#endif
+ 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 signal */
+ } else if (handler == TARGET_SIG_ERR) {
+ force_sig(sig);
+ } else {
+ queue_signal(k, sig, info);
+ }
+}
+
+int do_sigaction(int sig, const struct target_sigaction *act,
+ struct target_sigaction *oact)
+{
+ struct emulated_sigaction *k;
+
+ if (sig < 1 || sig > TARGET_NSIG)
+ return -EINVAL;
+ k = &sigact_table[sig - 1];
+#if defined(DEBUG_SIGNAL) && 0
+ 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);
+ oact->sa_restorer = tswapl(k->sa.sa_restorer);
+ 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);
+ k->sa.sa_restorer = tswapl(act->sa_restorer);
+ k->sa.sa_mask = act->sa_mask;
+ }
+ return 0;
+}
+
+#ifdef TARGET_I386
+
+/* from the Linux kernel */
+
+struct target_fpreg {
+ uint16_t significand[4];
+ uint16_t exponent;
+};
+
+struct target_fpxreg {
+ uint16_t significand[4];
+ uint16_t exponent;
+ uint16_t padding[3];
+};
+
+struct target_xmmreg {
+ target_ulong element[4];
+};
+
+struct target_fpstate {
+ /* Regular FPU environment */
+ target_ulong cw;
+ target_ulong sw;
+ target_ulong tag;
+ target_ulong ipoff;
+ target_ulong cssel;
+ target_ulong dataoff;
+ target_ulong datasel;
+ struct target_fpreg _st[8];
+ uint16_t status;
+ uint16_t magic; /* 0xffff = regular FPU data only */
+
+ /* FXSR FPU environment */
+ target_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */
+ target_ulong mxcsr;
+ target_ulong reserved;
+ struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */
+ struct target_xmmreg _xmm[8];
+ target_ulong padding[56];
+};
+
+#define X86_FXSR_MAGIC 0x0000
+
+struct target_sigcontext {
+ uint16_t gs, __gsh;
+ uint16_t fs, __fsh;
+ uint16_t es, __esh;
+ uint16_t ds, __dsh;
+ target_ulong edi;
+ target_ulong esi;
+ target_ulong ebp;
+ target_ulong esp;
+ target_ulong ebx;
+ target_ulong edx;
+ target_ulong ecx;
+ target_ulong eax;
+ target_ulong trapno;
+ target_ulong err;
+ target_ulong eip;
+ uint16_t cs, __csh;
+ target_ulong eflags;
+ target_ulong esp_at_signal;
+ uint16_t ss, __ssh;
+ target_ulong fpstate; /* pointer */
+ target_ulong oldmask;
+ 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 */
+};
+
+struct sigframe
+{
+ target_ulong pretcode;
+ int sig;
+ struct target_sigcontext sc;
+ struct target_fpstate fpstate;
+ target_ulong extramask[TARGET_NSIG_WORDS-1];
+ char retcode[8];
+};
+
+struct rt_sigframe
+{
+ target_ulong pretcode;
+ int sig;
+ target_ulong pinfo;
+ target_ulong puc;
+ struct target_siginfo info;
+ struct target_ucontext uc;
+ struct target_fpstate fpstate;
+ char retcode[8];
+};
+
+/*
+ * 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, siginfo_t *info)
+{
+ host_to_target_siginfo(tinfo, info);
+ return 0;
+}
+
+/* XXX: save x87 state */
+static int
+setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate,
+ CPUX86State *env, unsigned long mask)
+{
+ int err = 0;
+
+ err |= __put_user(env->segs[R_GS], (unsigned int *)&sc->gs);
+ err |= __put_user(env->segs[R_FS], (unsigned int *)&sc->fs);
+ err |= __put_user(env->segs[R_ES], (unsigned int *)&sc->es);
+ err |= __put_user(env->segs[R_DS], (unsigned int *)&sc->ds);
+ err |= __put_user(env->regs[R_EDI], &sc->edi);
+ err |= __put_user(env->regs[R_ESI], &sc->esi);
+ err |= __put_user(env->regs[R_EBP], &sc->ebp);
+ err |= __put_user(env->regs[R_ESP], &sc->esp);
+ err |= __put_user(env->regs[R_EBX], &sc->ebx);
+ err |= __put_user(env->regs[R_EDX], &sc->edx);
+ err |= __put_user(env->regs[R_ECX], &sc->ecx);
+ err |= __put_user(env->regs[R_EAX], &sc->eax);
+ err |= __put_user(/*current->thread.trap_no*/ 0, &sc->trapno);
+ err |= __put_user(/*current->thread.error_code*/ 0, &sc->err);
+ err |= __put_user(env->eip, &sc->eip);
+ err |= __put_user(env->segs[R_CS], (unsigned int *)&sc->cs);
+ err |= __put_user(env->eflags, &sc->eflags);
+ err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal);
+ err |= __put_user(env->segs[R_SS], (unsigned int *)&sc->ss);
+#if 0
+ tmp = save_i387(fpstate);
+ if (tmp < 0)
+ err = 1;
+ else
+ err |= __put_user(tmp ? fpstate : NULL, &sc->fpstate);
+#else
+ err |= __put_user(0, &sc->fpstate);
+#endif
+ /* non-iBCS2 extensions.. */
+ err |= __put_user(mask, &sc->oldmask);
+ err |= __put_user(/*current->thread.cr2*/ 0, &sc->cr2);
+
+ return err;
}
+/*
+ * Determine which stack to use..
+ */
-void process_pending_signals(void)
+static inline void *
+get_sigframe(struct emulated_sigaction *ka, CPUX86State *env, size_t frame_size)
{
- int signum;
- target_ulong _sa_handler;
+ unsigned long esp;
+
+ /* 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;
+ }
+
+ /* This is the legacy signal stack switching. */
+ else if ((regs->xss & 0xffff) != __USER_DS &&
+ !(ka->sa.sa_flags & SA_RESTORER) &&
+ ka->sa.sa_restorer) {
+ esp = (unsigned long) ka->sa.sa_restorer;
+ }
+#endif
+ return (void *)((esp - frame_size) & -8ul);
+}
+
+#define TF_MASK TRAP_FLAG
+
+static void setup_frame(int sig, struct emulated_sigaction *ka,
+ target_sigset_t *set, CPUX86State *env)
+{
+ struct sigframe *frame;
+ int 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
+ ? current->exec_domain->signal_invmap[sig]
+ : */ sig),
+ &frame->sig);
+ if (err)
+ goto give_sigsegv;
+
+ setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0]);
+ 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;
+
+ /* 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);
+ } else {
+ err |= __put_user(frame->retcode, &frame->pretcode);
+ /* This is popl %eax ; movl $,%eax ; int $0x80 */
+ err |= __put_user(0xb858, (short *)(frame->retcode+0));
+ err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2));
+ err |= __put_user(0x80cd, (short *)(frame->retcode+6));
+ }
+
+ if (err)
+ goto give_sigsegv;
+
+ /* Set up registers for signal handler */
+ env->regs[R_ESP] = (unsigned long) frame;
+ env->eip = (unsigned long) ka->sa._sa_handler;
+
+ cpu_x86_load_seg(env, R_DS, __USER_DS);
+ cpu_x86_load_seg(env, R_ES, __USER_DS);
+ cpu_x86_load_seg(env, R_SS, __USER_DS);
+ cpu_x86_load_seg(env, R_CS, __USER_CS);
+ env->eflags &= ~TF_MASK;
+
+ return;
+
+give_sigsegv:
+ if (sig == TARGET_SIGSEGV)
+ ka->sa._sa_handler = TARGET_SIG_DFL;
+ force_sig(TARGET_SIGSEGV /* , current */);
+}
+
+static void setup_rt_frame(int sig, struct emulated_sigaction *ka, siginfo_t *info,
+ target_sigset_t *set, CPUX86State *env)
+{
+ struct rt_sigframe *frame;
+ int 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
+ ? current->exec_domain->signal_invmap[sig]
+ : */sig),
+ &frame->sig);
+ err |= __put_user((target_ulong)&frame->info, &frame->pinfo);
+ err |= __put_user((target_ulong)&frame->uc, &frame->puc);
+ err |= copy_siginfo_to_user(&frame->info, info);
+ if (err)
+ goto give_sigsegv;
- struct emulated_sigaction *esig;
+ /* 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,
+ env, set->sig[0]);
+ err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
+ 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);
+ } else {
+ err |= __put_user(frame->retcode, &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));
+ err |= __put_user(0x80cd, (short *)(frame->retcode+5));
+ }
+
+ if (err)
+ goto give_sigsegv;
+
+ /* Set up registers for signal handler */
+ env->regs[R_ESP] = (unsigned long) frame;
+ env->eip = (unsigned long) ka->sa._sa_handler;
+
+ cpu_x86_load_seg(env, R_DS, __USER_DS);
+ cpu_x86_load_seg(env, R_ES, __USER_DS);
+ cpu_x86_load_seg(env, R_SS, __USER_DS);
+ cpu_x86_load_seg(env, R_CS, __USER_CS);
+ env->eflags &= ~TF_MASK;
+
+ return;
+
+give_sigsegv:
+ if (sig == TARGET_SIGSEGV)
+ ka->sa._sa_handler = TARGET_SIG_DFL;
+ force_sig(TARGET_SIGSEGV /* , current */);
+}
+
+static int
+restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax)
+{
+ unsigned int err = 0;
+
+
+
+#define COPY(x) err |= __get_user(regs->x, &sc->x)
+
+#define COPY_SEG(seg) \
+ { unsigned short tmp; \
+ err |= __get_user(tmp, &sc->seg); \
+ regs->x##seg = tmp; }
+
+#define COPY_SEG_STRICT(seg) \
+ { unsigned short tmp; \
+ err |= __get_user(tmp, &sc->seg); \
+ regs->x##seg = tmp|3; }
+
+#define GET_SEG(seg) \
+ { unsigned short tmp; \
+ err |= __get_user(tmp, &sc->seg); \
+ loadsegment(seg,tmp); }
+
+ 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);
+
+ 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 */
+ }
+
+#if 0
+ {
+ struct _fpstate * buf;
+ err |= __get_user(buf, &sc->fpstate);
+ if (buf) {
+ if (verify_area(VERIFY_READ, buf, sizeof(*buf)))
+ goto badframe;
+ err |= restore_i387(buf);
+ }
+ }
+#endif
+ *peax = ldl(&sc->eax);
+ return err;
+#if 0
+badframe:
+ return 1;
+#endif
+}
+
+long do_sigreturn(CPUX86State *env)
+{
+ struct sigframe *frame = (struct sigframe *)(env->regs[R_ESP] - 8);
+ target_sigset_t target_set;
+ sigset_t set;
+ int eax, i;
+
+ /* 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];
+
+ target_to_host_sigset(&set, &target_set);
+ sigprocmask(SIG_SETMASK, &set, NULL);
+
+ /* restore registers */
+ if (restore_sigcontext(env, &frame->sc, &eax))
+ goto badframe;
+ return eax;
+
+badframe:
+ force_sig(TARGET_SIGSEGV);
+ return 0;
+}
+
+long do_rt_sigreturn(CPUX86State *env)
+{
+ struct rt_sigframe *frame = (struct rt_sigframe *)(env->regs[R_ESP] - 4);
+ target_sigset_t target_set;
+ 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);
+ sigprocmask(SIG_SETMASK, &set, NULL);
+
+ if (restore_sigcontext(env, &frame->uc.uc_mcontext, &eax))
+ goto badframe;
+
+#if 0
+ if (__copy_from_user(&st, &frame->uc.uc_stack, sizeof(st)))
+ 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:
+ force_sig(TARGET_SIGSEGV);
+ return 0;
+}
+
+#endif
+
+void process_pending_signals(void *cpu_env)
+{
+ int sig;
+ target_ulong handler;
+ target_sigset_t set;
+ struct emulated_sigaction *k;
+ struct sigqueue *q;
+
if (!signal_pending)
return;
- esig = sigact_table;
- for(signum = 1; signum < TARGET_NSIG; signum++) {
- if (esig->nb_pending != 0)
+ k = sigact_table;
+ for(sig = 1; sig <= TARGET_NSIG; sig++) {
+ if (k->pending)
goto handle_signal;
- esig++;
+ k++;
}
/* if no signal is pending, just return */
signal_pending = 0;
return;
+
handle_signal:
- _sa_handler = esig->sa._sa_handler;
- if (_sa_handler == TARGET_SIG_DFL) {
- /* default handling
+#ifdef DEBUG_SIGNAL
+ fprintf(stderr, "gemu: process signal %d\n", sig);
+#endif
+ /* dequeue signal */
+ q = k->first;
+ k->first = q->next;
+ if (!k->first)
+ k->pending = 0;
+
+ 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 {
+ set = k->sa.sa_mask;
+ /* send the signal to the CPU */
+ if (k->sa.sa_flags & TARGET_SA_SIGINFO)
+ setup_rt_frame(sig, k, &q->info, &set, cpu_env);
+ else
+ setup_frame(sig, k, &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);
+}
-}
#include "syscall-i386.h"
#endif
+void host_to_target_siginfo(target_siginfo_t *tinfo, siginfo_t *info);
+void target_to_host_siginfo(siginfo_t *info, target_siginfo_t *tinfo);
+long do_sigreturn(CPUX86State *env);
+long do_rt_sigreturn(CPUX86State *env);
+
#define __NR_sys_uname __NR_uname
#define __NR_sys_getcwd1 __NR_getcwd
#define __NR_sys_statfs __NR_statfs
#define __NR_sys_fstatfs __NR_fstatfs
#define __NR_sys_getdents __NR_getdents
#define __NR_sys_getdents64 __NR_getdents64
+#define __NR_sys_rt_sigqueueinfo __NR_rt_sigqueueinfo
#ifdef __NR_gettid
_syscall0(int, gettid)
loff_t *, res, uint, wh);
_syscall2(int,sys_statfs,const char *,path,struct kernel_statfs *,buf)
_syscall2(int,sys_fstatfs,int,fd,struct kernel_statfs *,buf)
+_syscall3(int,sys_rt_sigqueueinfo,int,pid,int,sig,siginfo_t *,uinfo)
+
+extern int personality(int);
static inline long get_errno(long ret)
{
#endif
}
-/* XXX: incorrect for some archs */
-static void host_to_target_old_sigset(target_ulong *old_sigset,
- const sigset_t *sigset)
+static inline void target_to_host_timeval(struct timeval *tv,
+ struct target_timeval *target_tv)
{
- *old_sigset = tswap32(*(unsigned long *)sigset & 0xffffffff);
+ tv->tv_sec = tswapl(target_tv->tv_sec);
+ tv->tv_usec = tswapl(target_tv->tv_usec);
}
-static void target_to_host_old_sigset(sigset_t *sigset,
- const target_ulong *old_sigset)
+static inline void host_to_target_timeval(struct target_timeval *target_tv,
+ struct timeval *tv)
{
- sigemptyset(sigset);
- *(unsigned long *)sigset = tswapl(*old_sigset);
+ target_tv->tv_sec = tswapl(tv->tv_sec);
+ target_tv->tv_usec = tswapl(tv->tv_usec);
}
ret = get_errno(setsid());
break;
case TARGET_NR_sigaction:
-#if 1
{
- ret = 0;
+ struct target_old_sigaction *old_act = (void *)arg2;
+ struct target_old_sigaction *old_oact = (void *)arg3;
+ struct target_sigaction act, oact, *pact;
+ if (old_act) {
+ act._sa_handler = old_act->_sa_handler;
+ target_siginitset(&act.sa_mask, old_act->sa_mask);
+ act.sa_flags = old_act->sa_flags;
+ act.sa_restorer = old_act->sa_restorer;
+ pact = &act;
+ } else {
+ pact = NULL;
+ }
+ ret = get_errno(do_sigaction(arg1, pact, &oact));
+ if (!is_error(ret) && old_oact) {
+ old_oact->_sa_handler = oact._sa_handler;
+ old_oact->sa_mask = oact.sa_mask.sig[0];
+ old_oact->sa_flags = oact.sa_flags;
+ old_oact->sa_restorer = oact.sa_restorer;
+ }
}
break;
-#else
- goto unimplemented;
-#endif
+ case TARGET_NR_rt_sigaction:
+ ret = get_errno(do_sigaction(arg1, (void *)arg2, (void *)arg3));
+ break;
case TARGET_NR_sgetmask:
- goto unimplemented;
+ {
+ sigset_t cur_set;
+ target_ulong target_set;
+ sigprocmask(0, NULL, &cur_set);
+ host_to_target_old_sigset(&target_set, &cur_set);
+ ret = target_set;
+ }
+ break;
case TARGET_NR_ssetmask:
- goto unimplemented;
+ {
+ sigset_t set, oset, cur_set;
+ target_ulong target_set = arg1;
+ sigprocmask(0, NULL, &cur_set);
+ target_to_host_old_sigset(&set, &target_set);
+ sigorset(&set, &set, &cur_set);
+ sigprocmask(SIG_SETMASK, &set, &oset);
+ host_to_target_old_sigset(&target_set, &oset);
+ ret = target_set;
+ }
+ break;
+ case TARGET_NR_sigprocmask:
+ {
+ int how = arg1;
+ sigset_t set, oldset, *set_ptr;
+ target_ulong *pset = (void *)arg2, *poldset = (void *)arg3;
+
+ if (pset) {
+ switch(how) {
+ case TARGET_SIG_BLOCK:
+ how = SIG_BLOCK;
+ break;
+ case TARGET_SIG_UNBLOCK:
+ how = SIG_UNBLOCK;
+ break;
+ case TARGET_SIG_SETMASK:
+ how = SIG_SETMASK;
+ break;
+ default:
+ ret = -EINVAL;
+ goto fail;
+ }
+ target_to_host_old_sigset(&set, pset);
+ set_ptr = &set;
+ } else {
+ how = 0;
+ set_ptr = NULL;
+ }
+ ret = get_errno(sigprocmask(arg1, set_ptr, &oldset));
+ if (!is_error(ret) && poldset) {
+ host_to_target_old_sigset(poldset, &oldset);
+ }
+ }
+ break;
+ case TARGET_NR_rt_sigprocmask:
+ {
+ int how = arg1;
+ sigset_t set, oldset, *set_ptr;
+ target_sigset_t *pset = (void *)arg2;
+ target_sigset_t *poldset = (void *)arg3;
+
+ if (pset) {
+ switch(how) {
+ case TARGET_SIG_BLOCK:
+ how = SIG_BLOCK;
+ break;
+ case TARGET_SIG_UNBLOCK:
+ how = SIG_UNBLOCK;
+ break;
+ case TARGET_SIG_SETMASK:
+ how = SIG_SETMASK;
+ break;
+ default:
+ ret = -EINVAL;
+ goto fail;
+ }
+ target_to_host_sigset(&set, pset);
+ set_ptr = &set;
+ } else {
+ how = 0;
+ set_ptr = NULL;
+ }
+ ret = get_errno(sigprocmask(how, set_ptr, &oldset));
+ if (!is_error(ret) && poldset) {
+ host_to_target_sigset(poldset, &oldset);
+ }
+ }
+ break;
+ case TARGET_NR_sigpending:
+ {
+ sigset_t set;
+ ret = get_errno(sigpending(&set));
+ if (!is_error(ret)) {
+ host_to_target_old_sigset((target_ulong *)arg1, &set);
+ }
+ }
+ break;
+ case TARGET_NR_rt_sigpending:
+ {
+ sigset_t set;
+ ret = get_errno(sigpending(&set));
+ if (!is_error(ret)) {
+ host_to_target_sigset((target_sigset_t *)arg1, &set);
+ }
+ }
+ break;
+ case TARGET_NR_sigsuspend:
+ {
+ sigset_t set;
+ target_to_host_old_sigset(&set, (target_ulong *)arg1);
+ ret = get_errno(sigsuspend(&set));
+ }
+ break;
+ case TARGET_NR_rt_sigsuspend:
+ {
+ sigset_t set;
+ target_to_host_sigset(&set, (target_sigset_t *)arg1);
+ ret = get_errno(sigsuspend(&set));
+ }
+ break;
+ case TARGET_NR_rt_sigtimedwait:
+ {
+ target_sigset_t *target_set = (void *)arg1;
+ target_siginfo_t *target_uinfo = (void *)arg2;
+ struct target_timespec *target_uts = (void *)arg3;
+ sigset_t set;
+ struct timespec uts, *puts;
+ siginfo_t uinfo;
+
+ target_to_host_sigset(&set, target_set);
+ if (target_uts) {
+ puts = &uts;
+ puts->tv_sec = tswapl(target_uts->tv_sec);
+ puts->tv_nsec = tswapl(target_uts->tv_nsec);
+ } else {
+ puts = NULL;
+ }
+ ret = get_errno(sigtimedwait(&set, &uinfo, puts));
+ if (!is_error(ret) && target_uinfo) {
+ host_to_target_siginfo(target_uinfo, &uinfo);
+ }
+ }
+ break;
+ case TARGET_NR_rt_sigqueueinfo:
+ {
+ siginfo_t uinfo;
+ target_to_host_siginfo(&uinfo, (target_siginfo_t *)arg3);
+ ret = get_errno(sys_rt_sigqueueinfo(arg1, arg2, &uinfo));
+ }
+ break;
+ case TARGET_NR_sigreturn:
+ /* NOTE: ret is eax, so not transcoding must be done */
+ ret = do_sigreturn(cpu_env);
+ break;
+ case TARGET_NR_rt_sigreturn:
+ /* NOTE: ret is eax, so not transcoding must be done */
+ ret = do_rt_sigreturn(cpu_env);
+ break;
case TARGET_NR_setreuid:
ret = get_errno(setreuid(arg1, arg2));
break;
case TARGET_NR_setregid:
ret = get_errno(setregid(arg1, arg2));
break;
- case TARGET_NR_sigsuspend:
- goto unimplemented;
- case TARGET_NR_sigpending:
- goto unimplemented;
case TARGET_NR_sethostname:
ret = get_errno(sethostname((const char *)arg1, arg2));
break;
case TARGET_NR_syslog:
goto unimplemented;
case TARGET_NR_setitimer:
- goto unimplemented;
+ {
+ struct target_itimerval *target_value = (void *)arg2;
+ struct target_itimerval *target_ovalue = (void *)arg3;
+ struct itimerval value, ovalue, *pvalue;
+
+ if (target_value) {
+ pvalue = &value;
+ target_to_host_timeval(&pvalue->it_interval,
+ &target_value->it_interval);
+ target_to_host_timeval(&pvalue->it_value,
+ &target_value->it_value);
+ } else {
+ pvalue = NULL;
+ }
+ ret = get_errno(setitimer(arg1, pvalue, &ovalue));
+ if (!is_error(ret) && target_ovalue) {
+ host_to_target_timeval(&target_ovalue->it_interval,
+ &ovalue.it_interval);
+ host_to_target_timeval(&target_ovalue->it_value,
+ &ovalue.it_value);
+ }
+ }
+ break;
case TARGET_NR_getitimer:
- goto unimplemented;
+ {
+ struct target_itimerval *target_value = (void *)arg2;
+ struct itimerval value;
+
+ ret = get_errno(getitimer(arg1, &value));
+ if (!is_error(ret) && target_value) {
+ host_to_target_timeval(&target_value->it_interval,
+ &value.it_interval);
+ host_to_target_timeval(&target_value->it_value,
+ &value.it_value);
+ }
+ }
+ break;
case TARGET_NR_stat:
ret = get_errno(stat((const char *)arg1, &st));
goto do_stat;
case TARGET_NR_fsync:
ret = get_errno(fsync(arg1));
break;
- case TARGET_NR_sigreturn:
- goto unimplemented;
case TARGET_NR_clone:
ret = get_errno(do_fork(cpu_env, arg1, arg2));
break;
case TARGET_NR_mprotect:
ret = get_errno(mprotect((void *)arg1, arg2, arg3));
break;
- case TARGET_NR_sigprocmask:
- {
- int how = arg1;
- sigset_t set, oldset, *set_ptr;
- target_ulong *pset = (void *)arg2, *poldset = (void *)arg3;
-
- switch(how) {
- case TARGET_SIG_BLOCK:
- how = SIG_BLOCK;
- break;
- case TARGET_SIG_UNBLOCK:
- how = SIG_UNBLOCK;
- break;
- case TARGET_SIG_SETMASK:
- how = SIG_SETMASK;
- break;
- default:
- ret = -EINVAL;
- goto fail;
- }
-
- if (pset) {
- target_to_host_old_sigset(&set, pset);
- set_ptr = &set;
- } else {
- set_ptr = NULL;
- }
- ret = get_errno(sigprocmask(arg1, set_ptr, &oldset));
- if (!is_error(ret) && poldset) {
- host_to_target_old_sigset(poldset, &oldset);
- }
- }
- break;
case TARGET_NR_create_module:
case TARGET_NR_init_module:
case TARGET_NR_delete_module:
case TARGET_NR_setresgid:
case TARGET_NR_getresgid:
case TARGET_NR_prctl:
- case TARGET_NR_rt_sigreturn:
- case TARGET_NR_rt_sigaction:
- case TARGET_NR_rt_sigprocmask:
- case TARGET_NR_rt_sigpending:
- case TARGET_NR_rt_sigtimedwait:
- case TARGET_NR_rt_sigqueueinfo:
- case TARGET_NR_rt_sigsuspend:
case TARGET_NR_pread:
case TARGET_NR_pwrite:
goto unimplemented;
projects / qemu.git / commitdiff