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* gendef (sigdelayed): Remember to pop all of the saved registers. 

(sigreturn): Add "leave" label.
This commit is contained in:
Christopher Faylor 2011-12-16 16:32:25 +00:00
parent 6bd406f9ed
commit 56d06b9af3
2 changed files with 42 additions and 37 deletions
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5
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,8 @@
2011-12-16 Christopher Faylor <me.cygwin2011@cgf.cx>
* gendef (sigdelayed): Remember to pop all of the saved registers.
(sigreturn): Add "leave" label.
2011-12-16 Christopher Faylor <me.cygwin2011@cgf.cx>
* fhandler.cc (fhandler_base_overlapped::wait_overlapped): Fix

74
winsup/cygwin/gendef
View File

@ -160,42 +160,6 @@ __sigbe: # return here after cygwin syscall
popl %ebx
ret
.global _sigreturn
_sigreturn:
movl %fs:4,%ebx
incl $tls::incyg(%ebx)
addl \$12,%esp # remove arguments
call _set_process_mask\@4
1: movl \$1,%eax # potential lock value
xchgl %eax,$tls::stacklock(%ebx) # see if we can grab it
movl %eax,$tls::spinning(%ebx) # flag if we are waiting for lock
testl %eax,%eax # it will be zero
jz 2f # if so
call _yield # sleep
jmp 1b # and loop
2: popl %edx # saved errno
testl %edx,%edx # Is it < 0
jl 3f # yup. ignore it
movl $tls::errno_addr(%ebx),%eax
movl %edx,(%eax)
3: movl \$-4,%eax # now decrement aux stack
xadd %eax,$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
decl $tls::incyg(%ebx)
decl $tls::stacklock(%ebx) # unlock
popl %eax
popl %ebx
popl %ecx
popl %edx
popl %edi
popl %esi
popf
ret
.global _sigdelayed
_sigdelayed:
pushl %ebp
@ -223,7 +187,7 @@ _sigdelayed:
2: incl $tls::incyg(%ebx)
movl $tls::sig(%ebx),%eax
testl %eax,%eax
jz 4f # call_signal_handler may have beat us
jz leave # call_signal_handler may have beat us
# to it
pushl $tls::saved_errno(%ebx) # saved errno
call _set_process_mask_delta
@ -247,6 +211,42 @@ _sigdelayed:
decl $tls::stacklock(%ebx)
ret # return via signal handler
.global _sigreturn
_sigreturn:
movl %fs:4,%ebx
incl $tls::incyg(%ebx)
addl \$12,%esp # remove arguments
call _set_process_mask\@4
1: movl \$1,%eax # potential lock value
xchgl %eax,$tls::stacklock(%ebx) # see if we can grab it
movl %eax,$tls::spinning(%ebx) # flag if we are waiting for lock
testl %eax,%eax # it will be zero
jz 2f # if so
call _yield # sleep
jmp 1b # and loop
2: popl %edx # saved errno
testl %edx,%edx # Is it < 0
jl 3f # yup. ignore it
movl $tls::errno_addr(%ebx),%eax
movl %edx,(%eax)
3: movl \$-4,%eax # now decrement aux stack
xadd %eax,$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
leave: decl $tls::incyg(%ebx)
decl $tls::stacklock(%ebx) # unlock
popl %eax
popl %ebx
popl %ecx
popl %edx
popl %edi
popl %esi
popf
ret
.global __ZN7_cygtls3popEv
__ZN7_cygtls3popEv:
1: pushl %ebx