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Set EFLAGS correctly on startup

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lazymio 2022-02-25 22:44:42 +01:00
parent 186be25c40
commit d946114dfe
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GPG Key ID: DFF27E34A47CB873
2 changed files with 22 additions and 1 deletions
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2
qemu/target/i386/unicorn.c
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@ -80,7 +80,7 @@ void x86_reg_reset(struct uc_struct *uc)
memset(&env->idt, 0, sizeof(env->idt));
env->eip = 0;
env->eflags = 0;
cpu_load_eflags(env, 0, -1);
env->cc_op = CC_OP_EFLAGS;
env->fpstt = 0; /* top of stack index */

21
tests/unit/test_x86.c
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@ -932,6 +932,26 @@ static void test_x86_64_nested_emu_start_error()
OK(uc_close(uc));
}
static void test_x86_eflags_reserved_bit()
{
uc_engine *uc;
uint32_t r_eflags;
OK(uc_open(UC_ARCH_X86, UC_MODE_32, &uc));
OK(uc_reg_read(uc, UC_X86_REG_EFLAGS, &r_eflags));
TEST_CHECK((r_eflags & 2) != 0);
OK(uc_reg_write(uc, UC_X86_REG_EFLAGS, &r_eflags));
OK(uc_reg_read(uc, UC_X86_REG_EFLAGS, &r_eflags));
TEST_CHECK((r_eflags & 2) != 0);
OK(uc_close(uc));
}
TEST_LIST = {
{"test_x86_in", test_x86_in},
{"test_x86_out", test_x86_out},
@ -962,4 +982,5 @@ TEST_LIST = {
{"test_x86_nested_emu_start", test_x86_nested_emu_start},
{"test_x86_nested_emu_stop", test_x86_nested_emu_stop},
{"test_x86_64_nested_emu_start_error", test_x86_64_nested_emu_start_error},
{"test_x86_eflags_reserved_bit", test_x86_eflags_reserved_bit},
{NULL, NULL}};