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* gendef (sigdelayed (x86_64)): Save and restore FPU control word.

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(_sigdelayed (x86)): Ditto.  Save and restore XMM registers.  Add
	comment.
	(_setjmp (x86)): Save FPU control word, following FreeBSD here.
	(_longjmp (x86)): Restore FPU control word.
This commit is contained in:
Corinna Vinschen 2014-01-27 20:08:36 +00:00
parent a3973a22ca
commit ed89fbc3ff
2 changed files with 41 additions and 4 deletions
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8
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,11 @@
2014-01-27 Corinna Vinschen <corinna@vinschen.de>
* gendef (sigdelayed (x86_64)): Save and restore FPU control word.
(_sigdelayed (x86)): Ditto. Save and restore XMM registers. Add
comment.
(_setjmp (x86)): Save FPU control word, following FreeBSD here.
(_longjmp (x86)): Restore FPU control word.
2014-01-24 Christopher Faylor <me.cygwin2014@cgf.cx>
* winf.cc (linebuf::fromargv): Treat '=' as a special character.

37
winsup/cygwin/gendef
View File

@ -225,8 +225,9 @@ sigdelayed:
pushq %rax
.seh_pushreg %rax
pushf
subq \$0x120,%rsp
.seh_stackalloc 0x120
subq \$0x130,%rsp
.seh_stackalloc 0x130
fnstcw 0x120(%rsp)
movdqa %xmm15,0x110(%rsp)
movdqa %xmm14,0x100(%rsp)
movdqa %xmm13,0xf0(%rsp)
@ -285,7 +286,9 @@ sigdelayed:
movdqa 0xf0(%rsp),%xmm13
movdqa 0x100(%rsp),%xmm14
movdqa 0x110(%rsp),%xmm15
addq \$0x120,%rsp
fninit
fldcw 0x120(%rsp)
addq \$0x130,%rsp
popf
popq %rax
popq %rbx
@ -449,6 +452,8 @@ __sigbe: # return here after cygwin syscall
_sigdelayed:
pushl %ebp
movl %esp,%ebp
# We could be called from an interrupted thread which doesn't know
# about his fate, so save and restore everything and the kitchen sink.
pushf
pushl %esi
pushl %edi
@ -456,6 +461,16 @@ _sigdelayed:
pushl %ecx
pushl %ebx
pushl %eax
subl \$0x84,%esp
fnstcw 0x80(%esp)
movdqu %xmm7,0x70(%esp)
movdqu %xmm6,0x60(%esp)
movdqu %xmm5,0x50(%esp)
movdqu %xmm4,0x40(%esp)
movdqu %xmm3,0x30(%esp)
movdqu %xmm2,0x20(%esp)
movdqu %xmm1,0x10(%esp)
movdqu %xmm0,(%esp)
movl %fs:4,%ebx # get tls
pushl $tls::saved_errno(%ebx) # saved errno
@ -480,11 +495,22 @@ _sigdelayed:
xadd %eax,$tls::stackptr(%ebx) # and get pointer
xorl %ebp,%ebp
xchgl %ebp,-4(%eax) # get return address from signal stack
xchgl %ebp,28(%esp) # store real return address
xchgl %ebp,0xa0(%esp) # store real return address
leave: xorl %eax,%eax
movl %eax,$tls::incyg(%ebx)
movl %eax,$tls::stacklock(%ebx) # unlock
movdqu (%esp),%xmm0
movdqu 0x10(%esp),%xmm1
movdqu 0x20(%esp),%xmm2
movdqu 0x30(%esp),%xmm3
movdqu 0x40(%esp),%xmm4
movdqu 0x50(%esp),%xmm5
movdqu 0x60(%esp),%xmm6
movdqu 0x70(%esp),%xmm7
fninit
fldcw 0x80(%esp)
addl \$0x84,%esp
popl %eax
popl %ebx
popl %ecx
@ -745,6 +771,7 @@ _setjmp:
movw %ax,42(%edi)
movl %fs:0,%eax
movl %eax,44(%edi)
fnstcw 56(%edi)
pushl %ebx
call stabilize_sig_stack
movl $tls::stackptr(%ebx),%eax # save stack pointer contents
@ -847,6 +874,8 @@ _longjmp:
movl 24(%edi),%ebp
pushfl
popl %ebx
fninit
fldcw 56(%edi)
movl 44(%edi),%eax
movl %eax,%fs:0
movw 42(%edi),%ax