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| author | Kevin Wolf <mail@kevin-wolf.de> | 2009-10-02 22:28:57 +0200 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2009-10-04 23:10:22 +0200 |
| commit | 09d85fb8432e816eb6f9a0512f04bf8e8a218d2f (patch) | |
| tree | 55015404e940c80a22d0f67cc221f59bf53821de /target-i386/op_helper.c | |
| parent | 94f4af02a1705974fceb90b47e884f44184b1f22 (diff) | |
| download | qemu-09d85fb8432e816eb6f9a0512f04bf8e8a218d2f.zip qemu-09d85fb8432e816eb6f9a0512f04bf8e8a218d2f.tar.gz qemu-09d85fb8432e816eb6f9a0512f04bf8e8a218d2f.tar.bz2 | |
target-i386: Fix exceptions for fxsave/fxrstor
This patch corrects the following aspects of exception generation in
fxsave/fxrstor:
* Generate #GP if the operand is not aligned to a 16 byte boundary
* Generate #UD if the LOCK prefix is used
* For CR0.EM = 1 #NM is generated, not #UD
Signed-off-by: Kevin Wolf <mail@kevin-wolf.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'target-i386/op_helper.c')
| -rw-r--r-- | target-i386/op_helper.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/target-i386/op_helper.c b/target-i386/op_helper.c index ef0acfc..26fe612 100644 --- a/target-i386/op_helper.c +++ b/target-i386/op_helper.c @@ -4350,6 +4350,11 @@ void helper_fxsave(target_ulong ptr, int data64) CPU86_LDouble tmp; target_ulong addr; + /* The operand must be 16 byte aligned */ + if (ptr & 0xf) { + raise_exception(EXCP0D_GPF); + } + fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11; fptag = 0; for(i = 0; i < 8; i++) { @@ -4406,6 +4411,11 @@ void helper_fxrstor(target_ulong ptr, int data64) CPU86_LDouble tmp; target_ulong addr; + /* The operand must be 16 byte aligned */ + if (ptr & 0xf) { + raise_exception(EXCP0D_GPF); + } + env->fpuc = lduw(ptr); fpus = lduw(ptr + 2); fptag = lduw(ptr + 4); |