diff options
| author | Joe Richey <joerichey@google.com> | 2022-12-24 16:16:04 -0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2023-01-11 09:59:38 +0100 |
| commit | b585edca34a817fdb751dfe94fbd3cde32ffe60d (patch) | |
| tree | 6b154790e20b49c6f1aeed2e7aa427965e3a4c5f /target | |
| parent | acedc9a660f83b362a1dec4b699e85d5dd82a067 (diff) | |
i386: Emit correct error code for 64-bit IDT entry
When in 64-bit mode, IDT entiries are 16 bytes, so `intno * 16` is used
for base/limit/offset calculations. However, even in 64-bit mode, the
exception error code still uses bits [3,16) for the invlaid interrupt
index.
This means the error code should still be `intno * 8 + 2` even in 64-bit
mode.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1382
Signed-off-by: Joe Richey <joerichey@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'target')
| -rw-r--r-- | target/i386/tcg/seg_helper.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/target/i386/tcg/seg_helper.c b/target/i386/tcg/seg_helper.c index 539189b4d1..03b58e94a2 100644 --- a/target/i386/tcg/seg_helper.c +++ b/target/i386/tcg/seg_helper.c @@ -882,7 +882,7 @@ static void do_interrupt64(CPUX86State *env, int intno, int is_int, dt = &env->idt; if (intno * 16 + 15 > dt->limit) { - raise_exception_err(env, EXCP0D_GPF, intno * 16 + 2); + raise_exception_err(env, EXCP0D_GPF, intno * 8 + 2); } ptr = dt->base + intno * 16; e1 = cpu_ldl_kernel(env, ptr); @@ -895,18 +895,18 @@ static void do_interrupt64(CPUX86State *env, int intno, int is_int, case 15: /* 386 trap gate */ break; default: - raise_exception_err(env, EXCP0D_GPF, intno * 16 + 2); + raise_exception_err(env, EXCP0D_GPF, intno * 8 + 2); break; } dpl = (e2 >> DESC_DPL_SHIFT) & 3; cpl = env->hflags & HF_CPL_MASK; /* check privilege if software int */ if (is_int && dpl < cpl) { - raise_exception_err(env, EXCP0D_GPF, intno * 16 + 2); + raise_exception_err(env, EXCP0D_GPF, intno * 8 + 2); } /* check valid bit */ if (!(e2 & DESC_P_MASK)) { - raise_exception_err(env, EXCP0B_NOSEG, intno * 16 + 2); + raise_exception_err(env, EXCP0B_NOSEG, intno * 8 + 2); } selector = e1 >> 16; offset = ((target_ulong)e3 << 32) | (e2 & 0xffff0000) | (e1 & 0x0000ffff); |