[thirdparty/glibc.git] / nptl / sysdeps / unix / sysv / linux / i386 / i486 / sem_timedwait.S

/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <sysdep.h>
#include <shlib-compat.h>
#include <pthread-errnos.h>

#ifndef UP
# define LOCK lock
#else
# define
#endif

#define SYS_gettimeofday	__NR_gettimeofday
#define SYS_futex		240
#define FUTEX_WAKE		1


	.text

	.globl	sem_timedwait
	.type	sem_timedwait,@function
	.align	16
	cfi_startproc
sem_timedwait:
	/* First check for cancellation.  */
	movl	%gs:CANCELHANDLING, %eax
	andl	$0xfffffff9, %eax
	cmpl	$8, %eax
	je	10f

	movl	4(%esp), %ecx

	movl	(%ecx), %eax
2:	testl	%eax, %eax
	je,pn	1f

	leal	-1(%eax), %edx
	LOCK
	cmpxchgl %edx, (%ecx)
	jne,pn	2b

	xorl	%eax, %eax
	ret

	/* Check whether the timeout value is valid.  */
1:	pushl	%esi
	cfi_adjust_cfa_offset(4)
	pushl	%edi
	cfi_adjust_cfa_offset(4)
	pushl	%ebx
	cfi_adjust_cfa_offset(4)
	subl	$12, %esp
	cfi_adjust_cfa_offset(12)

	movl	32(%esp), %edi
	cfi_offset(7, -12)		/* %edi */

	/* Check for invalid nanosecond field.  */
	cmpl	$1000000000, 4(%edi)
	movl	$EINVAL, %esi
	cfi_offset(6, -8)		/* %esi */
	jae	6f

	cfi_offset(3, -16)		/* %ebx */
7:	call	__pthread_enable_asynccancel
	movl	%eax, 8(%esp)

	xorl	%ecx, %ecx
	movl	%esp, %ebx
	movl	%ecx, %edx
	movl	$SYS_gettimeofday, %eax
	ENTER_KERNEL

	/* Compute relative timeout.  */
	movl	4(%esp), %eax
	movl	$1000, %edx
	mul	%edx		/* Milli seconds to nano seconds.  */
	movl	(%edi), %ecx
	movl	4(%edi), %edx
	subl	(%esp), %ecx
	subl	%eax, %edx
	jns	5f
	addl	$1000000000, %edx
	subl	$1, %ecx
5:	testl	%ecx, %ecx
	movl	$ETIMEDOUT, %esi
	js	6f		/* Time is already up.  */

	movl	%ecx, (%esp)	/* Store relative timeout.  */
	movl	%edx, 4(%esp)
	movl	28(%esp), %ebx
	xorl	%ecx, %ecx
	movl	%esp, %esi
	movl	$SYS_futex, %eax
	xorl	%edx, %edx
	ENTER_KERNEL
	movl	%eax, %esi

	movl	8(%esp), %eax
	call	__pthread_disable_asynccancel

	testl	%esi, %esi
	je,pt	9f
	cmpl	$-EWOULDBLOCK, %esi
	jne	3f

9:	movl	(%ebx), %eax
8:	testl	%eax, %eax
	je	7b

	leal	-1(%eax), %ecx
	LOCK
	cmpxchgl %ecx, (%ebx)
	jne,pn	8b

	addl	$12, %esp
	cfi_adjust_cfa_offset(-12)
	xorl	%eax, %eax
	popl	%ebx
	cfi_adjust_cfa_offset(-4)
	cfi_restore(3)
	popl	%edi
	cfi_adjust_cfa_offset(-4)
	cfi_restore(7)
	popl	%esi
	cfi_adjust_cfa_offset(-4)
	cfi_restore(6)
	ret

	cfi_adjust_cfa_offset(24)
	cfi_offset(6, -8)		/* %esi */
	cfi_offset(7, -12)	 	/* %edi */
	cfi_offset(3, -16)		/* %ebx */
3:	negl	%esi
6:
#ifdef PIC
	call	__i686.get_pc_thunk.bx
#else
	movl	$4f, %ebx
4:
#endif
	addl	$_GLOBAL_OFFSET_TABLE_, %ebx
#if USE___THREAD
	movl	%gs:0, %edx
	subl	errno@gottpoff(%ebx), %edx
	movl	%esi, (%edx)
#else
	call	__errno_location@plt
	movl	%esi, (%eax)
#endif

	addl	$12, %esp
	cfi_adjust_cfa_offset(-12)
	orl	$-1, %eax
	popl	%ebx
	cfi_adjust_cfa_offset(-4)
	cfi_restore(3)
	popl	%edi
	cfi_adjust_cfa_offset(-4)
	cfi_restore(7)
	popl	%esi
	cfi_adjust_cfa_offset(-4)
	cfi_restore(6)
	ret

10:	/* Canceled.  */
	movl	$0xffffffff, %gs:RESULT
	LOCK
	orl	$0x10, %gs:CANCELHANDLING
	movl	%gs:CLEANUP_JMP_BUF, %eax
	jmp	HIDDEN_JUMPTARGET (__pthread_unwind)
	cfi_endproc
	.size	sem_timedwait,.-sem_timedwait
Commit	Line	Data
a334319f	1	/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
1d087a7e UD	2	This file is part of the GNU C Library.
	3	Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
	4
	5	The GNU C Library is free software; you can redistribute it and/or
	6	modify it under the terms of the GNU Lesser General Public
	7	License as published by the Free Software Foundation; either
	8	version 2.1 of the License, or (at your option) any later version.
	9
	10	The GNU C Library is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	Lesser General Public License for more details.
	14
	15	You should have received a copy of the GNU Lesser General Public
	16	License along with the GNU C Library; if not, write to the Free
	17	Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	18	02111-1307 USA. */
	19
	20	#include <sysdep.h>
	21	#include <shlib-compat.h>
326132db	22	#include <pthread-errnos.h>
1d087a7e UD	23
	24	#ifndef UP
	25	# define LOCK lock
	26	#else
	27	# define
	28	#endif
	29
	30	#define SYS_gettimeofday __NR_gettimeofday
	31	#define SYS_futex 240
	32	#define FUTEX_WAKE 1
	33
1d087a7e UD	34
	35	.text
	36
	37	.globl sem_timedwait
	38	.type sem_timedwait,@function
	39	.align 16
7726edc2	40	cfi_startproc
1d087a7e	41	sem_timedwait:
7726edc2 UD	42	/* First check for cancellation. */
	43	movl %gs:CANCELHANDLING, %eax
	44	andl $0xfffffff9, %eax
	45	cmpl $8, %eax
	46	je 10f
	47
1d087a7e UD	48	movl 4(%esp), %ecx
	49
	50	movl (%ecx), %eax
	51	2: testl %eax, %eax
a334319f	52	je,pn 1f
1d087a7e UD	53
	54	leal -1(%eax), %edx
	55	LOCK
	56	cmpxchgl %edx, (%ecx)
a334319f	57	jne,pn 2b
1d087a7e UD	58
	59	xorl %eax, %eax
	60	ret
	61
	62	/* Check whether the timeout value is valid. */
	63	1: pushl %esi
7726edc2	64	cfi_adjust_cfa_offset(4)
1d087a7e	65	pushl %edi
7726edc2	66	cfi_adjust_cfa_offset(4)
1d087a7e	67	pushl %ebx
7726edc2 UD	68	cfi_adjust_cfa_offset(4)
	69	subl $12, %esp
	70	cfi_adjust_cfa_offset(12)
1d087a7e	71
7726edc2 UD	72	movl 32(%esp), %edi
7726edc2 UD	73	cfi_offset(7, -12) /* %edi */
1d087a7e UD	74
	75	/* Check for invalid nanosecond field. */
	76	cmpl $1000000000, 4(%edi)
7726edc2 UD	77	movl $EINVAL, %esi
7726edc2 UD	78	cfi_offset(6, -8) /* %esi */
1d087a7e UD	79	jae 6f
1d087a7e UD	80
7726edc2	81	cfi_offset(3, -16) /* %ebx */
a334319f UD	82	7: call __pthread_enable_asynccancel
	83	movl %eax, 8(%esp)
	84
	85	xorl %ecx, %ecx
1d087a7e UD	86	movl %esp, %ebx
	87	movl %ecx, %edx
	88	movl $SYS_gettimeofday, %eax
	89	ENTER_KERNEL
	90
	91	/* Compute relative timeout. */
	92	movl 4(%esp), %eax
	93	movl $1000, %edx
	94	mul %edx /* Milli seconds to nano seconds. */
	95	movl (%edi), %ecx
	96	movl 4(%edi), %edx
	97	subl (%esp), %ecx
	98	subl %eax, %edx
	99	jns 5f
	100	addl $1000000000, %edx
ccf1d573	101	subl $1, %ecx
1d087a7e	102	5: testl %ecx, %ecx
7726edc2	103	movl $ETIMEDOUT, %esi
1d087a7e UD	104	js 6f /* Time is already up. */
	105
	106	movl %ecx, (%esp) /* Store relative timeout. */
	107	movl %edx, 4(%esp)
7726edc2	108	movl 28(%esp), %ebx
1d087a7e	109	xorl %ecx, %ecx
7726edc2	110	movl %esp, %esi
1d087a7e UD	111	movl $SYS_futex, %eax
	112	xorl %edx, %edx
	113	ENTER_KERNEL
7726edc2 UD	114	movl %eax, %esi
	115
	116	movl 8(%esp), %eax
	117	call __pthread_disable_asynccancel
1d087a7e	118
7726edc2	119	testl %esi, %esi
a334319f	120	je,pt 9f
7726edc2	121	cmpl $-EWOULDBLOCK, %esi
1d087a7e UD	122	jne 3f
	123
	124	9: movl (%ebx), %eax
	125	8: testl %eax, %eax
	126	je 7b
	127
	128	leal -1(%eax), %ecx
	129	LOCK
	130	cmpxchgl %ecx, (%ebx)
a334319f	131	jne,pn 8b
1d087a7e	132
7726edc2 UD	133	addl $12, %esp
7726edc2 UD	134	cfi_adjust_cfa_offset(-12)
1d087a7e UD	135	xorl %eax, %eax
1d087a7e UD	136	popl %ebx
7726edc2 UD	137	cfi_adjust_cfa_offset(-4)
7726edc2 UD	138	cfi_restore(3)
1d087a7e	139	popl %edi
7726edc2 UD	140	cfi_adjust_cfa_offset(-4)
7726edc2 UD	141	cfi_restore(7)
1d087a7e	142	popl %esi
7726edc2 UD	143	cfi_adjust_cfa_offset(-4)
7726edc2 UD	144	cfi_restore(6)
1d087a7e UD	145	ret
1d087a7e UD	146
7726edc2 UD	147	cfi_adjust_cfa_offset(24)
7726edc2 UD	148	cfi_offset(6, -8) /* %esi */
4123718e	149	cfi_offset(7, -12) /* %edi */
7726edc2 UD	150	cfi_offset(3, -16) /* %ebx */
7726edc2 UD	151	3: negl %esi
1d087a7e UD	152	6:
	153	#ifdef PIC
	154	call __i686.get_pc_thunk.bx
	155	#else
	156	movl $4f, %ebx
	157	4:
	158	#endif
	159	addl $_GLOBAL_OFFSET_TABLE_, %ebx
	160	#if USE___THREAD
a334319f UD	161	movl %gs:0, %edx
a334319f UD	162	subl errno@gottpoff(%ebx), %edx
7726edc2	163	movl %esi, (%edx)
1d087a7e	164	#else
1d087a7e	165	call __errno_location@plt
7726edc2	166	movl %esi, (%eax)
1d087a7e UD	167	#endif
1d087a7e UD	168
7726edc2 UD	169	addl $12, %esp
7726edc2 UD	170	cfi_adjust_cfa_offset(-12)
1d087a7e UD	171	orl $-1, %eax
1d087a7e UD	172	popl %ebx
7726edc2 UD	173	cfi_adjust_cfa_offset(-4)
7726edc2 UD	174	cfi_restore(3)
1d087a7e	175	popl %edi
7726edc2 UD	176	cfi_adjust_cfa_offset(-4)
7726edc2 UD	177	cfi_restore(7)
1d087a7e	178	popl %esi
7726edc2 UD	179	cfi_adjust_cfa_offset(-4)
7726edc2 UD	180	cfi_restore(6)
1d087a7e	181	ret
7726edc2 UD	182
	183	10: /* Canceled. */
	184	movl $0xffffffff, %gs:RESULT
	185	LOCK
	186	orl $0x10, %gs:CANCELHANDLING
	187	movl %gs:CLEANUP_JMP_BUF, %eax
da0c02ee	188	jmp HIDDEN_JUMPTARGET (__pthread_unwind)
7726edc2	189	cfi_endproc
1d087a7e	190	.size sem_timedwait,.-sem_timedwait