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better signal/exception support

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@42 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard
2003-03-23 16:49:39 +00:00
parent 66fb9763af
commit 9de5e440b9
15 changed files with 644 additions and 208 deletions
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52
linux-user/main.c
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@ -33,7 +33,10 @@
FILE *logfile = NULL;
int loglevel;
unsigned long x86_stack_size;
/* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
we allocate a bigger stack. Need a better solution, for example
by remapping the process stack directly at the right place */
unsigned long x86_stack_size = 512 * 1024;
unsigned long stktop;
void gemu_log(const char *fmt, ...)
@ -102,10 +105,11 @@ uint64_t gdt_table[6];
void cpu_loop(struct CPUX86State *env)
{
int err;
uint8_t *pc;
target_siginfo_t info;
for(;;) {
int err;
uint8_t *pc;
err = cpu_x86_exec(env);
pc = env->seg_cache[R_CS].base + env->eip;
switch(err) {
@ -122,12 +126,42 @@ void cpu_loop(struct CPUX86State *env)
env->regs[R_EDI],
env->regs[R_EBP]);
} else {
goto trap_error;
/* XXX: more precise info */
info.si_signo = SIGSEGV;
info.si_errno = 0;
info.si_code = 0;
info._sifields._sigfault._addr = 0;
queue_signal(info.si_signo, &info);
}
break;
case EXCP00_DIVZ:
/* division by zero */
info.si_signo = SIGFPE;
info.si_errno = 0;
info.si_code = TARGET_FPE_INTDIV;
info._sifields._sigfault._addr = env->eip;
queue_signal(info.si_signo, &info);
break;
case EXCP04_INTO:
case EXCP05_BOUND:
info.si_signo = SIGSEGV;
info.si_errno = 0;
info.si_code = 0;
info._sifields._sigfault._addr = 0;
queue_signal(info.si_signo, &info);
break;
case EXCP06_ILLOP:
info.si_signo = SIGILL;
info.si_errno = 0;
info.si_code = TARGET_ILL_ILLOPN;
info._sifields._sigfault._addr = env->eip;
queue_signal(info.si_signo, &info);
break;
case EXCP_INTERRUPT:
/* just indicate that signals should be handled asap */
break;
default:
trap_error:
fprintf(stderr, "0x%08lx: Unknown exception %d, aborting\n",
fprintf(stderr, "0x%08lx: Unknown exception CPU %d, aborting\n",
(long)pc, err);
abort();
}
@ -144,6 +178,9 @@ void usage(void)
exit(1);
}
/* XXX: currently only used for async signals (see signal.c) */
CPUX86State *global_env;
int main(int argc, char **argv)
{
const char *filename;
@ -199,6 +236,7 @@ int main(int argc, char **argv)
signal_init();
env = cpu_x86_init();
global_env = env;
/* linux register setup */
env->regs[R_EAX] = regs->eax;