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added raise_exception_err() - added cr2 update

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@126 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2003-05-08 15:38:04 +00:00
parent 9ba5695ce5
commit b56dad1c7b
1 changed files with 34 additions and 11 deletions
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45
exec-i386.c
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@ -149,7 +149,7 @@ void cpu_unlock(void)
/* exception support */
/* NOTE: not static to force relocation generation by GCC */
void raise_exception(int exception_index)
void raise_exception_err(int exception_index, int error_code)
{
/* NOTE: the register at this point must be saved by hand because
longjmp restore them */
@ -178,9 +178,16 @@ void raise_exception(int exception_index)
env->regs[R_EDI] = EDI;
#endif
env->exception_index = exception_index;
env->error_code = error_code;
longjmp(env->jmp_env, 1);
}
/* short cut if error_code is 0 or not present */
void raise_exception(int exception_index)
{
raise_exception_err(exception_index, 0);
}
#if defined(DEBUG_EXEC)
static const char *cc_op_str[] = {
"DYNAMIC",
@ -218,8 +225,13 @@ static const char *cc_op_str[] = {
static void cpu_x86_dump_state(FILE *f)
{
int eflags;
char cc_op_name[32];
eflags = cc_table[CC_OP].compute_all();
eflags |= (DF & DF_MASK);
if ((unsigned)env->cc_op < CC_OP_NB)
strcpy(cc_op_name, cc_op_str[env->cc_op]);
else
snprintf(cc_op_name, sizeof(cc_op_name), "[%d]", env->cc_op);
fprintf(f,
"EAX=%08x EBX=%08X ECX=%08x EDX=%08x\n"
"ESI=%08x EDI=%08X EBP=%08x ESP=%08x\n"
@ -227,7 +239,7 @@ static void cpu_x86_dump_state(FILE *f)
"EIP=%08x\n",
env->regs[R_EAX], env->regs[R_EBX], env->regs[R_ECX], env->regs[R_EDX],
env->regs[R_ESI], env->regs[R_EDI], env->regs[R_EBP], env->regs[R_ESP],
env->cc_src, env->cc_dst, cc_op_str[env->cc_op],
env->cc_src, env->cc_dst, cc_op_name,
eflags & DF_MASK ? 'D' : '-',
eflags & CC_O ? 'O' : '-',
eflags & CC_S ? 'S' : '-',
@ -280,14 +292,18 @@ static inline TranslationBlock *tb_find(TranslationBlock ***pptb,
h = pc & (CODE_GEN_HASH_SIZE - 1);
ptb = &tb_hash[h];
for(;;) {
tb = *ptb;
if (!tb)
break;
if (tb->pc == pc && tb->cs_base == cs_base && tb->flags == flags)
#if 0
/* XXX: hack to handle 16 bit modyfing code */
if (flags & (1 << GEN_FLAG_CODE32_SHIFT))
#endif
for(;;) {
tb = *ptb;
if (!tb)
break;
if (tb->pc == pc && tb->cs_base == cs_base && tb->flags == flags)
return tb;
ptb = &tb->hash_next;
}
ptb = &tb->hash_next;
}
*pptb = ptb;
return NULL;
}
@ -404,6 +420,8 @@ int cpu_x86_exec(CPUX86State *env1)
(unsigned long)env->seg_cache[R_SS].base) != 0) <<
GEN_FLAG_ADDSEG_SHIFT;
flags |= (env->eflags & VM_MASK) >> (17 - GEN_FLAG_VM_SHIFT);
flags |= (env->eflags & IOPL_MASK) >> (12 - GEN_FLAG_IOPL_SHIFT);
flags |= (env->segs[R_CS] & 3) << GEN_FLAG_CPL_SHIFT;
cs_base = env->seg_cache[R_CS].base;
pc = cs_base + env->eip;
tb = tb_find(&ptb, (unsigned long)pc, (unsigned long)cs_base,
@ -508,7 +526,10 @@ void cpu_x86_load_seg(CPUX86State *s, int seg_reg, int selector)
#include <signal.h>
#include <sys/ucontext.h>
/* 'pc' is the host PC at which the exception was raised. 'address' is
the effective address of the memory exception */
static inline int handle_cpu_signal(unsigned long pc,
unsigned long address,
sigset_t *old_set)
{
#ifdef DEBUG_SIGNAL
@ -524,7 +545,9 @@ static inline int handle_cpu_signal(unsigned long pc,
sigprocmask(SIG_SETMASK, old_set, NULL);
/* XXX: need to compute virtual pc position by retranslating
code. The rest of the CPU state should be correct. */
raise_exception(EXCP0D_GPF);
env->cr2 = address;
/* XXX: more precise exception code */
raise_exception_err(EXCP0E_PAGE, 4);
/* never comes here */
return 1;
} else {
@ -546,7 +569,7 @@ int cpu_x86_signal_handler(int host_signum, struct siginfo *info,
#endif
pc = uc->uc_mcontext.gregs[REG_EIP];
pold_set = &uc->uc_sigmask;
return handle_cpu_signal(pc, pold_set);
return handle_cpu_signal(pc, (unsigned long)info->si_addr, pold_set);
#else
#warning No CPU specific signal handler: cannot handle target SIGSEGV events
return 0;