davidxu 2006-05-28 06:51:57 UTC
FreeBSD src repository
Modified files:
sys/i386/i386 machdep.c ptrace_machdep.c
Log:
Clear high 16 bits of mxcsr register, according to Intel document, if
the high 16 bits is non-zero, fxrstor instruction will generate GP fault,
resulting kernel crash, this bug can be triggered by setcontext and
ptrace(PT_SETXMMREGS).
Revision Changes Path
1.627 +3 -0 src/sys/i386/i386/machdep.c
1.5 +2 -0 src/sys/i386/i386/ptrace_machdep.c
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