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| author | Corinna Vinschen <corinna@vinschen.de> | 2013-05-21 18:26:48 +0000 |
|---|---|---|
| committer | Corinna Vinschen <corinna@vinschen.de> | 2013-05-21 18:26:48 +0000 |
| commit | 2cf3d4faaeaf7fa4208a6b4271260e1fec0d33f7 (patch) | |
| tree | aa7e3fd267da9dbddce8f83199f58a29a6405e5d /winsup/cygwin/gendef | |
| parent | e0ce0961fe3b045efe21e9608beda2e837f839d0 (diff) | |
| download | cygnal-2cf3d4faaeaf7fa4208a6b4271260e1fec0d33f7.tar.gz cygnal-2cf3d4faaeaf7fa4208a6b4271260e1fec0d33f7.tar.bz2 cygnal-2cf3d4faaeaf7fa4208a6b4271260e1fec0d33f7.zip | |
x86_64 only:
* gendef (_sigfe_maybe): Drop pushing %r12, use %r10 instead since we
don't call yield anymore.
(_sigfe): Ditto.
(_sigbe): Ditto.
Diffstat (limited to 'winsup/cygwin/gendef')
| -rwxr-xr-x | winsup/cygwin/gendef | 51 |
1 files changed, 20 insertions, 31 deletions
diff --git a/winsup/cygwin/gendef b/winsup/cygwin/gendef index a9906fdaf..37077997b 100755 --- a/winsup/cygwin/gendef +++ b/winsup/cygwin/gendef @@ -130,44 +130,36 @@ EOF .text .seh_proc _sigfe_maybe -_sigfe_maybe: - pushq %r12 - .seh_pushreg %r12 +_sigfe_maybe: # stack is aligned on entry! .seh_endprologue - movq %gs:8,%r12 # location of bottom of stack - addq \$$tls::initialized,%r12 # where we will be looking - cmpq %r12,%rsp # stack loc > than tls - jge 0f # yep. we don't have a tls. - subq \$$tls::initialized,%r12 # where we will be looking - movl $tls::initialized(%r12),%r11d + movq %gs:8,%r10 # location of bottom of stack + addq \$$tls::initialized,%r10 # where we will be looking + cmpq %r10,%rsp # stack loc > than tls + ret # yep. we don't have a tls. + subq \$$tls::initialized,%r10 # where we will be looking + movl $tls::initialized(%r10),%r11d cmpl \$0xc763173f,%r11d # initialized? je 1f -0: - popq %r12 - ret .seh_endproc .seh_proc _sigfe _sigfe: # stack is aligned on entry! - pushq %r12 - .seh_pushreg %r12 .seh_endprologue - movq %gs:8,%r12 # location of bottom of stack + movq %gs:8,%r10 # location of bottom of stack 1: movl \$1,%r11d # potential lock value - xchgl %r11d,$tls::stacklock(%r12) # see if we can grab it - movl %r11d,$tls::spinning(%r12) # flag if we are waiting for lock + xchgl %r11d,$tls::stacklock(%r10) # see if we can grab it + movl %r11d,$tls::spinning(%r10) # flag if we are waiting for lock testl %r11d,%r11d # it will be zero jz 2f # if so pause jmp 1b # loop 2: movq \$8,%rax # have the lock, now increment the - xaddq %rax,$tls::stackptr(%r12) # stack pointer and get pointer + xaddq %rax,$tls::stackptr(%r10) # stack pointer and get pointer leaq _sigbe(%rip),%r11 # new place to return to - xchgq %r11,16(%rsp) # exchange with real return value + xchgq %r11,8(%rsp) # exchange with real return value movq %r11,(%rax) # store real return value on alt stack - incl $tls::incyg(%r12) - decl $tls::stacklock(%r12) # remove lock - popq %r12 # restore saved value + incl $tls::incyg(%r10) + decl $tls::stacklock(%r10) # remove lock popq %rax # pop real function address from stack jmp *%rax # and jmp to it .seh_endproc @@ -175,23 +167,20 @@ _sigfe: # stack is aligned on entry! .seh_proc _sigfe _sigbe: # return here after cygwin syscall # stack is aligned on entry! - pushq %r12 - .seh_pushreg %r12 .seh_endprologue - movq %gs:8,%r12 # address of bottom of tls + movq %gs:8,%r10 # address of bottom of tls 1: movl \$1,%r11d # potential lock value - xchgl %r11d,$tls::stacklock(%r12) # see if we can grab it - movl %r11d,$tls::spinning(%r12) # flag if we are waiting for lock + xchgl %r11d,$tls::stacklock(%r10) # see if we can grab it + movl %r11d,$tls::spinning(%r10) # flag if we are waiting for lock testl %r11d,%r11d # it will be zero jz 2f # if so pause jmp 1b # and loop 2: movq \$-8,%r11 # now decrement aux stack - xaddq %r11,$tls::stackptr(%r12) # and get pointer + xaddq %r11,$tls::stackptr(%r10) # and get pointer movq -8(%r11),%r11 # get return address from signal stack - decl $tls::incyg(%r12) - decl $tls::stacklock(%r12) # release lock - popq %r12 + decl $tls::incyg(%r10) + decl $tls::stacklock(%r10) # release lock jmp *%r11 # "return" to caller .seh_endproc |