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ntdll: Increase the buffer size for processor features and add a check to catch future overflows.

This commit is contained in:
Huw Davies 2012-07-11 11:46:14 +01:00 committed by Alexandre Julliard
parent 0821c8024b
commit 760f487f6c
1 changed files with 2 additions and 1 deletions
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3
dlls/ntdll/nt.c
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@ -1217,7 +1217,7 @@ void fill_cpu_info(void)
unsigned long long longVal;
int value;
int cputype;
char buffer[256];
char buffer[1024];
valSize = sizeof(int);
if (sysctlbyname ("hw.optional.floatingpoint", &value, &valSize, NULL, 0) == 0)
@ -1280,6 +1280,7 @@ void fill_cpu_info(void)
if (sysctlbyname ("machdep.cpu.features", buffer, &valSize, NULL, 0) == 0)
{
cached_sci.Revision |= value;
if (!valSize) FIXME("Buffer not large enough, please increase\n");
if (strstr(buffer, "CX8")) user_shared_data->ProcessorFeatures[PF_COMPARE_EXCHANGE_DOUBLE] = TRUE;
if (strstr(buffer, "CX16")) user_shared_data->ProcessorFeatures[PF_COMPARE_EXCHANGE128] = TRUE;
if (strstr(buffer, "MMX")) user_shared_data->ProcessorFeatures[PF_MMX_INSTRUCTIONS_AVAILABLE] = TRUE;