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Save FPU state when saving context. For XMM-capable CPUs only (for now).

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This commit is contained in:
Konstantin Belousov 2010-04-10 00:47:08 +03:00
parent 117ccd246d
commit 9fe75c7d93
1 changed files with 4 additions and 6 deletions
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10
src/x86/getcontext.S
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@ -103,12 +103,10 @@ _Ux86_getcontext:
FREEBSD_UC_MCONTEXT_OWNEDFP_OFF(%eax)
movl $FREEBSD_UC_MCONTEXT_FPFMT_XMM,\
FREEBSD_UC_MCONTEXT_FPFORMAT_OFF(%eax)
/*
leal LINUX_UC_FPREGS_MEM_OFF(%eax), %ecx
movl %ecx, (LINUX_UC_MCONTEXT_OFF+LINUX_SC_FPSTATE_OFF)(%eax)
fnstenv (%ecx)
fldenv (%ecx)
*/
/* Require CPU with fxsave implemented, and enabled by OS. */
fxsave FREEBSD_UC_MCONTEXT_FPSTATE_OFF(%eax)
movl $FREEBSD_UC_MCONTEXT_MC_LEN_VAL,\
FREEBSD_UC_MCONTEXT_MC_LEN_OFF(%eax)
#endif