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* gendef (sigreturn): Call stabilize_sig_stack to ensure that there are no

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pending signals.  Restore edx later.
(sigdelayed): Save edx earlier.
* malloc_wrapper.cc (malloc_init): Add some more debugging output.
This commit is contained in:
Christopher Faylor
2004-03-04 05:31:14 +00:00
parent 13a47bd66a
commit 08b0a057eb
5 changed files with 50 additions and 38 deletions
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66
winsup/cygwin/gendef
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@@ -128,8 +128,8 @@ __sigbe:
2: movl \$-4,%eax # now decrement aux stack
xadd %eax,$tls::stackptr(%edx) # and get pointer
xorl %ebx,%ebx
xchgl %ebx,-4(%eax) #
xchgl %ebx,8(%esp)
xchgl %ebx,-4(%eax) # get return address from signal stack
xchgl %ebx,8(%esp) # restore ebx/real return address
decl $tls::stacklock(%edx) # release lock
popl %eax
popl %edx
@@ -172,29 +172,47 @@ __ZN7_cygtls6lockedEv:
movl $tls::pstacklock(%eax),%eax
ret
.extern __ZN7_cygtls19call_signal_handlerEv
stabilize_sig_stack:
1: movl %fs:4,%edx
movl \$1,%eax
lock xchgl %eax,$tls::stacklock(%edx)
movl %eax,$tls::spinning(%edx) # flag if we are waiting for lock
orl %eax,%eax
jz 2f
xorl %eax,%eax
call _low_priority_sleep
jmp 1b
2: cmpl \$0,$tls::sig(%edx)
jz 3f
decl $tls::stacklock(%edx) # unlock
movl \$-$tls::sizeof__cygtls,%eax # point to beginning
addl %edx,%eax # of tls block
call __ZN7_cygtls19call_signal_handlerEv
jmp 1b
3: ret
.global _sigreturn
.stabs "sigreturn:F(0,1)",36,0,0,_sigreturn
_sigreturn:
addl \$4,%esp # Remove argument
addl \$4,%esp # Remove argument
call _set_process_mask\@4
movl %fs:4,%ebx
call stabilize_sig_stack
# cmpl \$0,$tls::sig(%ebx) # Did a signal come in?
# jnz 3f # Yes, if non-zero
1: popl %edx # saved errno
testl %edx,%edx # Is it < 0
jl 2f # yup. ignore it
movl $tls::errno_addr(%ebx),%eax
movl %edx,(%eax)
1: popl %ebx # saved errno
testl %ebx,%ebx # Is it < 0
jl 2f # yup. ignore it
movl $tls::errno_addr(%edx),%eax
movl %ebx,(%eax)
2: popl %eax
popl %ebx
popl %ecx
popl %edx
popl %edi
popl %esi
popf
decl $tls::stacklock(%edx) # relinquish lock
popl %edx
popl %ebp
jmp __sigbe
@@ -203,10 +221,10 @@ _sigreturn:
_sigdelayed:
pushl %ebp
movl %esp,%ebp
pushl %edx
pushf
pushl %esi
pushl %edi
pushl %edx
pushl %ecx
pushl %ebx
pushl %eax
@@ -236,26 +254,6 @@ EOF
sub longjmp {
return <<EOF;
.extern __ZN7_cygtls19call_signal_handlerEv
stabilize_sig_stack:
1: movl %fs:4,%edx
movl \$1,%eax
lock xchgl %eax,$tls::stacklock(%edx)
movl %eax,$tls::spinning(%edx) # flag if we are waiting for lock
orl %eax,%eax
jz 2f
xorl %eax,%eax
call _low_priority_sleep
jmp 1b
2: cmpl \$0,$tls::sig(%edx)
jz 3f
decl $tls::stacklock(%edx) # unlock
movl \$-$tls::sizeof__cygtls,%eax # point to beginning
addl %edx,%eax # of tls block
call __ZN7_cygtls19call_signal_handlerEv
jmp 1b
3: ret
.globl _setjmp
_setjmp:
pushl %ebp