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x86: properly calculate EFLAGS when UC_HOOK_CODE is used. this should fix issue #246

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Nguyen Anh Quynh 2015-11-05 20:26:39 +08:00
parent 95745eff3b
commit 51323c9c17
4 changed files with 7 additions and 7 deletions
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7
qemu/target-i386/cc_helper.c
View File

@ -328,12 +328,7 @@ void helper_write_eflags(CPUX86State *env, target_ulong t0,
target_ulong helper_read_eflags(CPUX86State *env)
{
uint32_t eflags;
eflags = cpu_cc_compute_all(env, CC_OP);
eflags |= (env->df & DF_MASK);
eflags |= env->eflags & ~(VM_MASK | RF_MASK);
return eflags;
return cpu_compute_eflags(env);
}
void helper_clts(CPUX86State *env)

3
qemu/target-i386/cpu.h
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@ -839,6 +839,7 @@ typedef struct CPUX86State {
/* standard registers */
target_ulong regs[CPU_NB_REGS];
target_ulong eip;
target_ulong eflags0; // copy of eflags that does not change thru the BB
target_ulong eflags; /* eflags register. During CPU emulation, CC
flags and DF are set to zero because they are
stored elsewhere */
@ -1314,7 +1315,7 @@ void update_fp_status(CPUX86State *env);
static inline uint32_t cpu_compute_eflags(CPUX86State *env)
{
return env->eflags | cpu_cc_compute_all(env, CC_OP) | (env->df & DF_MASK);
return env->eflags0 | cpu_cc_compute_all(env, CC_OP) | (env->df & DF_MASK);
}
/* NOTE: the translator must set DisasContext.cc_op to CC_OP_EFLAGS

1
qemu/target-i386/helper.c
View File

@ -1141,4 +1141,5 @@ void x86_cpu_exec_exit(CPUState *cs)
CPUX86State *env = &cpu->env;
env->eflags = cpu_compute_eflags(env);
env->eflags0 = env->eflags;
}

3
qemu/target-i386/unicorn.c
View File

@ -70,6 +70,7 @@ void x86_reg_reset(struct uc_struct *uc)
env->eip = 0;
env->eflags = 0;
env->eflags0 = 0;
env->fpstt = 0; /* top of stack index */
env->fpus = 0;
@ -580,6 +581,7 @@ int x86_reg_write(struct uc_struct *uc, unsigned int regid, const void *value)
break;
case UC_X86_REG_EFLAGS:
X86_CPU(uc, mycpu)->env.eflags = *(uint32_t *)value;
X86_CPU(uc, mycpu)->env.eflags0 = *(uint32_t *)value;
break;
case UC_X86_REG_EAX:
X86_CPU(uc, mycpu)->env.regs[R_EAX] = *(uint32_t *)value;
@ -693,6 +695,7 @@ int x86_reg_write(struct uc_struct *uc, unsigned int regid, const void *value)
break;
case UC_X86_REG_EFLAGS:
X86_CPU(uc, mycpu)->env.eflags = *(uint64_t *)value;
X86_CPU(uc, mycpu)->env.eflags0 = *(uint64_t *)value;
break;
case UC_X86_REG_RAX:
X86_CPU(uc, mycpu)->env.regs[R_EAX] = *(uint64_t *)value;