diff options
| author | Corinna Vinschen <corinna@vinschen.de> | 2014-01-28 00:08:36 +0400 |
|---|---|---|
| committer | Corinna Vinschen <corinna@vinschen.de> | 2014-01-28 00:08:36 +0400 |
| commit | ed89fbc3ff110b01f753010bda1e770d14908875 (patch) | |
| tree | cbfd701b9a891004b3799f88d31d7aebd5f4520d /winsup/cygwin/gendef | |
| parent | a3973a22ca37d04b2292ec3dc9d26102d7f6b4d6 (diff) | |
* 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.
Diffstat (limited to 'winsup/cygwin/gendef')
| -rwxr-xr-x | winsup/cygwin/gendef | 37 |
1 files changed, 33 insertions, 4 deletions
diff --git a/winsup/cygwin/gendef b/winsup/cygwin/gendef index 2bb790588..fc033b530 100755 --- a/winsup/cygwin/gendef +++ b/winsup/cygwin/gendef @@ -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 |