diff options
Diffstat (limited to 'i386/i386/fpu.c')
| -rw-r--r-- | i386/i386/fpu.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/i386/i386/fpu.c b/i386/i386/fpu.c index 69c495c8..c5401fca 100644 --- a/i386/i386/fpu.c +++ b/i386/i386/fpu.c @@ -185,6 +185,11 @@ init_fpu(void) cpuid(eax, ebx, ecx, edx); if (eax & CPU_FEATURE_XSAVES) { fp_xsave_size = offsetof(struct i386_fpsave_state, xfp_save_state) + ebx; + if (fp_xsave_size < sizeof(struct i386_fpsave_state)) + panic("CPU-provided xstate size %d " + "is smaller than our minimum %d!\n", + fp_xsave_size, + sizeof(struct i386_fpsave_state)); fp_save_kind = FP_XSAVES; } else { @@ -192,6 +197,11 @@ init_fpu(void) ecx = 0x0; cpuid(eax, ebx, ecx, edx); fp_xsave_size = offsetof(struct i386_fpsave_state, xfp_save_state) + ebx; + if(fp_xsave_size < sizeof(struct i386_fpsave_state)); + panic("CPU-provided xstate size %d " + "is smaller than our minimum %d!\n", + fp_xsave_size, + sizeof(struct i386_fpsave_state)); if (eax & CPU_FEATURE_XSAVEOPT) fp_save_kind = FP_XSAVEOPT; |