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Merge remote-tracking branch 'mrexoida/avx-bug' into dev

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Mio 2022-07-23 19:26:07 +08:00
commit 2efee81df3
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4
qemu/target/i386/translate.c
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@ -3378,6 +3378,10 @@ static void gen_sse(CPUX86State *env, DisasContext *s, int b,
if (is_xmm)
reg |= rex_r;
mod = (modrm >> 6) & 3;
/* VEX.L (256 bit) encodings are not supported */
if (s->vex_l != 0) {
goto illegal_op; // perhaps it should be unknown_op?
}
if (sse_fn_epp == SSE_SPECIAL) {
b |= (b1 << 8);
switch(b) {

25
tests/regress/x86_vex.c
View File

@ -47,12 +47,37 @@ static void test_vmovdqu(void)
OK(uc_close(uc));
}
/* https://github.com/unicorn-engine/unicorn/issues/1656 */
static void test_vex_l(void)
{
uc_engine *uc;
uc_err err;
/* vmovdqu ymm1, [rcx] */
char code[] = { '\xC5', '\xFE', '\x6F', '\x09' };
/* initialize memory and run emulation */
OK(uc_open(UC_ARCH_X86, UC_MODE_64, &uc));
OK(uc_mem_map(uc, 0, 2 * 1024 * 1024, UC_PROT_ALL));
OK(uc_mem_write(uc, 0, code, sizeof(code) / sizeof(code[0])));
err = uc_emu_start(uc, 0, sizeof(code) / sizeof(code[0]), 0, 0);
if(err != UC_ERR_INSN_INVALID) {
fprintf(stderr, "%s", uc_strerror(err));
assert(false);
}
OK(uc_close(uc));
}
/* TODO: Add more vex prefixed instructions
Suggestions: vxorpd, vxorps, vandpd, ... */
int main(int argc, char **argv, char **envp)
{
test_vmovdqu();
test_vex_l();
return 0;
}