From 6bb8791f8021bc17aab97ec8c0b26bd70ebe48b1 Mon Sep 17 00:00:00 2001
From: cgf <cgf>
Date: Fri, 5 Mar 2004 19:09:03 +0000
Subject: [PATCH] * gendef (sigdelayed): Handle return here rather than going
 through sigbe to ensure that flags are properly restored.

---
 winsup/cygwin/ChangeLog |  58 +++++++++++------------
 winsup/cygwin/gendef    | 123 ++++++++++++++++++++++++++----------------------
 2 files changed, 96 insertions(+), 85 deletions(-)

diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index e403dd6b49..31876aec9c 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,41 +1,41 @@
+2004-03-05  Christopher Faylor  <cgf@redhat.com>
+
+	* gendef (sigdelayed): Handle return here rather than going through
+	sigbe to ensure that flags are properly restored.
+
 2004-03-04  Thomas Pfaff  <tpfaff@gmx.net>
 
-	* include/pthread.h (PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP):
-	New define.
+	* include/pthread.h (PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP): New
+	define.
 	(PTHREAD_NORMAL_MUTEX_INITIALIZER_NP): Ditto.
 	(PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP): Ditto.
-	* thread.cc (pthread_mutex::is_good_initializer):
-	Check for all posssible initializers
+	* thread.cc (pthread_mutex::is_good_initializer): Check for all
+	posssible initializers
 	(pthread_mutex::is_good_initializer_or_object): Ditto.
 	(pthread_mutex::is_good_initializer_or_bad_object): Ditto.
-	(verifyable_object_isvalid): Support up to three static
-	initializers.
+	(verifyable_object_isvalid): Support up to three static initializers.
 	(verifyable_object_isvalid (void const *,long)): Remove.
-	(pthread_cond::is_good_initializer_or_bad_object): Remove
-	unneeded objectState var.
-	(pthread_cond::init): Condition remains unchanged when creation
-	has failed.
-	(pthread_rwlock::is_good_initializer_or_bad_object): Remove
-	unneeded objectState var.
-	(pthread_rwlock::init): Rwlock remains unchanged when creation
-	has failed.
-	(pthread_mutex::init): Remove obsolete comment.
-	Mutex remains unchanged when creation has failed. Add support
-	for new initializers.
-	(pthread_mutex_getprioceiling): Do not create mutex,
-	just return ENOSYS.
+	(pthread_cond::is_good_initializer_or_bad_object): Remove unneeded
+	objectState var.
+	(pthread_cond::init): Condition remains unchanged when creation has
+	failed.
+	(pthread_rwlock::is_good_initializer_or_bad_object): Remove unneeded
+	objectState var.
+	(pthread_rwlock::init): Rwlock remains unchanged when creation has
+	failed.
+	(pthread_mutex::init): Remove obsolete comment.  Mutex remains
+	unchanged when creation has failed.  Add support for new initializers.
+	(pthread_mutex_getprioceiling): Do not create mutex, just return
+	ENOSYS.
 	(pthread_mutex_lock): Simplify.
 	(pthread_mutex_trylock): Remove unneeded local themutex.
-	(pthread_mutex_unlock): Just return EPERM if mutex is not
-	initialized.
-	(pthread_mutex_setprioceiling): Do not create mutex,
-	just return ENOSYS.
-	* thread.h (verifyable_object_isvalid): Support up to three
-	static initializers.
-	(verifyable_object_isvalid (void const *,long)): Remove
-	prototype.
-	(pthread_mutex::init): Add optional initializer to parameter
-	list.
+	(pthread_mutex_unlock): Just return EPERM if mutex is not initialized.
+	(pthread_mutex_setprioceiling): Do not create mutex, just return
+	ENOSYS.
+	* thread.h (verifyable_object_isvalid): Support up to three static
+	initializers.
+	(verifyable_object_isvalid (void const *,long)): Remove prototype.
+	(pthread_mutex::init): Add optional initializer to parameter list.
 
 2004-03-03  Christopher Faylor  <cgf@redhat.com>
 
diff --git a/winsup/cygwin/gendef b/winsup/cygwin/gendef
index 141a4e77ef..a208cbe31c 100755
--- a/winsup/cygwin/gendef
+++ b/winsup/cygwin/gendef
@@ -87,7 +87,7 @@ EOF
 	$res = <<EOF . longjmp () . $res;
 	.text
 
-	.stabs	"_sigfe:F(0,1)",36,0,0,__sigbe
+	.stabs	"_sigfe:F(0,1)",36,0,0,__sigfe
 __sigfe:
 	pushl	%ebx
 	pushl	%edx
@@ -135,6 +135,72 @@ __sigbe:
 	popl	%edx
 	ret
 
+	.global	_sigreturn
+	.stabs	"sigreturn:F(0,1)",36,0,0,_sigreturn
+_sigreturn:
+	addl	\$4,%esp				# Remove argument
+	call	_set_process_mask\@4
+
+1:	movl	%fs:4,%edx
+	movl	\$1,%eax				# potential lock value
+	lock	xchgl %eax,$tls::stacklock(%edx)	# see if we can grab it
+	movl	%eax,$tls::spinning(%edx)		# flag if we are waiting for lock
+	orl	%eax,%eax				# it will be zero
+	jz	2f					#  if so
+	xorl	%eax,%eax				# nope.  not zero
+	call	_low_priority_sleep			# sleep
+	jmp	1b					#  and loop
+2:	popl	%ebx					# saved errno
+	testl	%ebx,%ebx				# Is it < 0
+	jl	3f					# yup.  ignore it
+	movl	$tls::errno_addr(%edx),%eax
+	movl	%ebx,(%eax)
+3:	movl	\$-4,%eax				# now decrement aux stack
+	xadd	%eax,$tls::stackptr(%edx)		#  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::stacklock(%edx)			# unlock
+
+	popl	%eax
+	popl	%ebx
+	popl	%ecx
+	popl	%edx
+	popl	%edi
+	popl	%esi
+	popf
+	ret
+
+	.global	_sigdelayed
+	.stabs	"sigdelayed:F(0,1)",36,0,0,_sigdelayed
+_sigdelayed:
+	pushl	%ebp
+	movl	%esp,%ebp
+	pushf
+	pushl	%esi
+	pushl	%edi
+	pushl	%edx
+	pushl	%ecx
+	pushl	%ebx
+	pushl	%eax
+	movl	%fs:4,%ebx
+	pushl	$tls::saved_errno(%ebx)	# saved errno
+3:	pushl	$tls::oldmask(%ebx)	# oldmask
+	pushl	$tls::sig(%ebx)		# signal argument
+	pushl	\$_sigreturn
+
+	call	_reset_signal_arrived\@0
+	pushl	$tls::func(%ebx)	# signal func
+	pushl	$tls::newmask(%ebx)	# newmask - eaten by set_process_mask
+
+	call	_set_process_mask\@4
+	cmpl	\$0,$tls::threadkill(%ebx)#pthread_kill signal?
+	jnz	4f			#yes.  Callee clears signal number
+	movl	\$0,$tls::sig(%ebx)	# zero the signal number as a
+					# flag to the signal handler thread
+					# that it is ok to set up sigsave
+4:	ret
+
 	.global	__ZN7_cygtls3popEv
 __ZN7_cygtls3popEv:
 1:	pushl	%ebx
@@ -191,61 +257,6 @@ stabilize_sig_stack:
 	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
-	call	_set_process_mask\@4
-
-	call	stabilize_sig_stack
-
-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	%edi
-	popl	%esi
-	popf
-	decl	$tls::stacklock(%edx)			# relinquish lock
-	popl	%edx
-	popl	%ebp
-	jmp	__sigbe
-
-	.global	_sigdelayed
-	.stabs	"sigdelayed:F(0,1)",36,0,0,_sigdelayed
-_sigdelayed:
-	pushl	%ebp
-	movl	%esp,%ebp
-	pushl	%edx
-	pushf
-	pushl	%esi
-	pushl	%edi
-	pushl	%ecx
-	pushl	%ebx
-	pushl	%eax
-	movl	%fs:4,%ebx
-	pushl	$tls::saved_errno(%ebx)	# saved errno
-3:	pushl	$tls::oldmask(%ebx)	# oldmask
-	pushl	$tls::sig(%ebx)		# signal argument
-	pushl	\$_sigreturn
-
-	call	_reset_signal_arrived\@0
-	pushl	$tls::func(%ebx)	# signal func
-	pushl	$tls::newmask(%ebx)	# newmask - eaten by set_process_mask
-
-	call	_set_process_mask\@4
-	cmpl	\$0,$tls::threadkill(%ebx)#pthread_kill signal?
-	jnz	4f			#yes.  Callee clears signal number
-	movl	\$0,$tls::sig(%ebx)	# zero the signal number as a
-					# flag to the signal handler thread
-					# that it is ok to set up sigsave
-4:	ret
-
 EOF
     }
     return $res;
-- 
2.11.0