[thirdparty/glibc.git] / nptl / sysdeps / unix / sysv / linux / i386 / sysdep-cancel.h

/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Jakub Jelinek <jakub@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, see
   <http://www.gnu.org/licenses/>.  */

#include <sysdep.h>
#include <tls.h>
#ifndef __ASSEMBLER__
# include <nptl/pthreadP.h>
#endif

#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt

# undef PSEUDO
# define PSEUDO(name, syscall_name, args)				      \
  .text;								      \
  ENTRY (name)								      \
    cmpl $0, %gs:MULTIPLE_THREADS_OFFSET;				      \
    jne L(pseudo_cancel);						      \
  .type __##syscall_name##_nocancel,@function;				      \
  .globl __##syscall_name##_nocancel;					      \
  __##syscall_name##_nocancel:						      \
    DO_CALL (syscall_name, args);					      \
    cmpl $-4095, %eax;							      \
    jae SYSCALL_ERROR_LABEL;						      \
    ret;								      \
  .size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel;	      \
  L(pseudo_cancel):							      \
    CENABLE								      \
    SAVE_OLDTYPE_##args							      \
    PUSHCARGS_##args							      \
    DOCARGS_##args							      \
    movl $SYS_ify (syscall_name), %eax;					      \
    ENTER_KERNEL;							      \
    POPCARGS_##args;							      \
    POPSTATE_##args							      \
    cmpl $-4095, %eax;							      \
    jae SYSCALL_ERROR_LABEL

# define SAVE_OLDTYPE_0	movl %eax, %ecx;
# define SAVE_OLDTYPE_1	SAVE_OLDTYPE_0
# define SAVE_OLDTYPE_2	pushl %eax; cfi_adjust_cfa_offset (4);
# define SAVE_OLDTYPE_3	SAVE_OLDTYPE_2
# define SAVE_OLDTYPE_4	SAVE_OLDTYPE_2
# define SAVE_OLDTYPE_5	SAVE_OLDTYPE_2
# define SAVE_OLDTYPE_6	SAVE_OLDTYPE_2

# define PUSHCARGS_0	/* No arguments to push.  */
# define DOCARGS_0	/* No arguments to frob.  */
# define POPCARGS_0	/* No arguments to pop.  */
# define _PUSHCARGS_0	/* No arguments to push.  */
# define _POPCARGS_0	/* No arguments to pop.  */

# define PUSHCARGS_1	movl %ebx, %edx; cfi_register (ebx, edx); PUSHCARGS_0
# define DOCARGS_1	_DOARGS_1 (4)
# define POPCARGS_1	POPCARGS_0; movl %edx, %ebx; cfi_restore (ebx);
# define _PUSHCARGS_1	pushl %ebx; cfi_adjust_cfa_offset (4); \
			cfi_rel_offset (ebx, 0); _PUSHCARGS_0
# define _POPCARGS_1	_POPCARGS_0; popl %ebx; \
			cfi_adjust_cfa_offset (-4); cfi_restore (ebx);

# define PUSHCARGS_2	PUSHCARGS_1
# define DOCARGS_2	_DOARGS_2 (12)
# define POPCARGS_2	POPCARGS_1
# define _PUSHCARGS_2	_PUSHCARGS_1
# define _POPCARGS_2	_POPCARGS_1

# define PUSHCARGS_3	_PUSHCARGS_2
# define DOCARGS_3	_DOARGS_3 (20)
# define POPCARGS_3	_POPCARGS_3
# define _PUSHCARGS_3	_PUSHCARGS_2
# define _POPCARGS_3	_POPCARGS_2

# define PUSHCARGS_4	_PUSHCARGS_4
# define DOCARGS_4	_DOARGS_4 (28)
# define POPCARGS_4	_POPCARGS_4
# define _PUSHCARGS_4	pushl %esi; cfi_adjust_cfa_offset (4); \
			cfi_rel_offset (esi, 0); _PUSHCARGS_3
# define _POPCARGS_4	_POPCARGS_3; popl %esi; \
			cfi_adjust_cfa_offset (-4); cfi_restore (esi);

# define PUSHCARGS_5	_PUSHCARGS_5
# define DOCARGS_5	_DOARGS_5 (36)
# define POPCARGS_5	_POPCARGS_5
# define _PUSHCARGS_5	pushl %edi; cfi_adjust_cfa_offset (4); \
			cfi_rel_offset (edi, 0); _PUSHCARGS_4
# define _POPCARGS_5	_POPCARGS_4; popl %edi; \
			cfi_adjust_cfa_offset (-4); cfi_restore (edi);

# define PUSHCARGS_6	_PUSHCARGS_6
# define DOCARGS_6	_DOARGS_6 (44)
# define POPCARGS_6	_POPCARGS_6
# define _PUSHCARGS_6	pushl %ebp; cfi_adjust_cfa_offset (4); \
			cfi_rel_offset (ebp, 0); _PUSHCARGS_5
# define _POPCARGS_6	_POPCARGS_5; popl %ebp; \
			cfi_adjust_cfa_offset (-4); cfi_restore (ebp);

# ifdef IS_IN_libpthread
#  define CENABLE	call __pthread_enable_asynccancel;
#  define CDISABLE	call __pthread_disable_asynccancel
# elif !defined NOT_IN_libc
#  define CENABLE	call __libc_enable_asynccancel;
#  define CDISABLE	call __libc_disable_asynccancel
# elif defined IS_IN_librt
#  define CENABLE	call __librt_enable_asynccancel;
#  define CDISABLE	call __librt_disable_asynccancel
# else
#  error Unsupported library
# endif
# define POPSTATE_0 \
 pushl %eax; cfi_adjust_cfa_offset (4); movl %ecx, %eax; \
 CDISABLE; popl %eax; cfi_adjust_cfa_offset (-4);
# define POPSTATE_1	POPSTATE_0
# define POPSTATE_2	xchgl (%esp), %eax; CDISABLE; popl %eax; \
			cfi_adjust_cfa_offset (-4);
# define POPSTATE_3	POPSTATE_2
# define POPSTATE_4	POPSTATE_3
# define POPSTATE_5	POPSTATE_4
# define POPSTATE_6	POPSTATE_5

# ifndef __ASSEMBLER__
#  define SINGLE_THREAD_P \
  __builtin_expect (THREAD_GETMEM (THREAD_SELF, \
				   header.multiple_threads) == 0, 1)
# else
#  define SINGLE_THREAD_P cmpl $0, %gs:MULTIPLE_THREADS_OFFSET
# endif

#elif !defined __ASSEMBLER__

# define SINGLE_THREAD_P (1)
# define NO_CANCELLATION 1

#endif

#ifndef __ASSEMBLER__
# define RTLD_SINGLE_THREAD_P \
  __builtin_expect (THREAD_GETMEM (THREAD_SELF, \
				   header.multiple_threads) == 0, 1)
#endif
Commit	Line	Data
842a39cd	1	/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
86b2dc40 UD	2	This file is part of the GNU C Library.
	3	Contributed by Jakub Jelinek <jakub@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
59ba27a6 PE	16	License along with the GNU C Library; if not, see
59ba27a6 PE	17	<http://www.gnu.org/licenses/>. */
86b2dc40 UD	18
	19	#include <sysdep.h>
	20	#include <tls.h>
a4baf360	21	#ifndef __ASSEMBLER__
6ee8d334 UD	22	# include <nptl/pthreadP.h>
6ee8d334 UD	23	#endif
86b2dc40	24
7a114794	25	#if !defined NOT_IN_libc \|\| defined IS_IN_libpthread \|\| defined IS_IN_librt
86b2dc40	26
6ee8d334 UD	27	# undef PSEUDO
6ee8d334 UD	28	# define PSEUDO(name, syscall_name, args) \
86b2dc40 UD	29	.text; \
	30	ENTRY (name) \
	31	cmpl $0, %gs:MULTIPLE_THREADS_OFFSET; \
	32	jne L(pseudo_cancel); \
8348dcc8 UD	33	.type __##syscall_name##_nocancel,@function; \
	34	.globl __##syscall_name##_nocancel; \
	35	__##syscall_name##_nocancel: \
86b2dc40 UD	36	DO_CALL (syscall_name, args); \
	37	cmpl $-4095, %eax; \
	38	jae SYSCALL_ERROR_LABEL; \
	39	ret; \
8348dcc8	40	.size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \
86b2dc40	41	L(pseudo_cancel): \
6ee8d334	42	CENABLE \
86b2dc40	43	SAVE_OLDTYPE_##args \
09d65ff3	44	PUSHCARGS_##args \
86b2dc40 UD	45	DOCARGS_##args \
86b2dc40 UD	46	movl $SYS_ify (syscall_name), %eax; \
4ae7142d	47	ENTER_KERNEL; \
09d65ff3 UD	48	POPCARGS_##args; \
09d65ff3 UD	49	POPSTATE_##args \
86b2dc40	50	cmpl $-4095, %eax; \
842a39cd	51	jae SYSCALL_ERROR_LABEL
86b2dc40	52
4d961dc7	53	# define SAVE_OLDTYPE_0 movl %eax, %ecx;
e700a908	54	# define SAVE_OLDTYPE_1 SAVE_OLDTYPE_0
5085cd1f	55	# define SAVE_OLDTYPE_2 pushl %eax; cfi_adjust_cfa_offset (4);
e700a908 UD	56	# define SAVE_OLDTYPE_3 SAVE_OLDTYPE_2
	57	# define SAVE_OLDTYPE_4 SAVE_OLDTYPE_2
	58	# define SAVE_OLDTYPE_5 SAVE_OLDTYPE_2
11bf311e	59	# define SAVE_OLDTYPE_6 SAVE_OLDTYPE_2
6ee8d334	60
09d65ff3 UD	61	# define PUSHCARGS_0 /* No arguments to push. */
	62	# define DOCARGS_0 /* No arguments to frob. */
	63	# define POPCARGS_0 /* No arguments to pop. */
	64	# define _PUSHCARGS_0 /* No arguments to push. */
	65	# define _POPCARGS_0 /* No arguments to pop. */
	66
5085cd1f	67	# define PUSHCARGS_1 movl %ebx, %edx; cfi_register (ebx, edx); PUSHCARGS_0
e700a908	68	# define DOCARGS_1 _DOARGS_1 (4)
5085cd1f UD	69	# define POPCARGS_1 POPCARGS_0; movl %edx, %ebx; cfi_restore (ebx);
	70	# define _PUSHCARGS_1 pushl %ebx; cfi_adjust_cfa_offset (4); \
	71	cfi_rel_offset (ebx, 0); _PUSHCARGS_0
	72	# define _POPCARGS_1 _POPCARGS_0; popl %ebx; \
	73	cfi_adjust_cfa_offset (-4); cfi_restore (ebx);
09d65ff3 UD	74
09d65ff3 UD	75	# define PUSHCARGS_2 PUSHCARGS_1
6ee8d334	76	# define DOCARGS_2 _DOARGS_2 (12)
09d65ff3 UD	77	# define POPCARGS_2 POPCARGS_1
	78	# define _PUSHCARGS_2 _PUSHCARGS_1
	79	# define _POPCARGS_2 _POPCARGS_1
	80
	81	# define PUSHCARGS_3 _PUSHCARGS_2
6ee8d334	82	# define DOCARGS_3 _DOARGS_3 (20)
09d65ff3 UD	83	# define POPCARGS_3 _POPCARGS_3
	84	# define _PUSHCARGS_3 _PUSHCARGS_2
	85	# define _POPCARGS_3 _POPCARGS_2
	86
	87	# define PUSHCARGS_4 _PUSHCARGS_4
6ee8d334	88	# define DOCARGS_4 _DOARGS_4 (28)
09d65ff3	89	# define POPCARGS_4 _POPCARGS_4
5085cd1f UD	90	# define _PUSHCARGS_4 pushl %esi; cfi_adjust_cfa_offset (4); \
	91	cfi_rel_offset (esi, 0); _PUSHCARGS_3
	92	# define _POPCARGS_4 _POPCARGS_3; popl %esi; \
	93	cfi_adjust_cfa_offset (-4); cfi_restore (esi);
09d65ff3 UD	94
09d65ff3 UD	95	# define PUSHCARGS_5 _PUSHCARGS_5
6ee8d334	96	# define DOCARGS_5 _DOARGS_5 (36)
09d65ff3	97	# define POPCARGS_5 _POPCARGS_5
5085cd1f UD	98	# define _PUSHCARGS_5 pushl %edi; cfi_adjust_cfa_offset (4); \
	99	cfi_rel_offset (edi, 0); _PUSHCARGS_4
	100	# define _POPCARGS_5 _POPCARGS_4; popl %edi; \
	101	cfi_adjust_cfa_offset (-4); cfi_restore (edi);
6ee8d334	102
11bf311e UD	103	# define PUSHCARGS_6 _PUSHCARGS_6
	104	# define DOCARGS_6 _DOARGS_6 (44)
	105	# define POPCARGS_6 _POPCARGS_6
	106	# define _PUSHCARGS_6 pushl %ebp; cfi_adjust_cfa_offset (4); \
	107	cfi_rel_offset (ebp, 0); _PUSHCARGS_5
	108	# define _POPCARGS_6 _POPCARGS_5; popl %ebp; \
	109	cfi_adjust_cfa_offset (-4); cfi_restore (ebp);
	110
6ee8d334 UD	111	# ifdef IS_IN_libpthread
	112	# define CENABLE call __pthread_enable_asynccancel;
	113	# define CDISABLE call __pthread_disable_asynccancel
bbde8527	114	# elif !defined NOT_IN_libc
6ee8d334 UD	115	# define CENABLE call __libc_enable_asynccancel;
6ee8d334 UD	116	# define CDISABLE call __libc_disable_asynccancel
bbde8527 UD	117	# elif defined IS_IN_librt
	118	# define CENABLE call __librt_enable_asynccancel;
	119	# define CDISABLE call __librt_disable_asynccancel
	120	# else
	121	# error Unsupported library
6ee8d334	122	# endif
09d65ff3	123	# define POPSTATE_0 \
5085cd1f UD	124	pushl %eax; cfi_adjust_cfa_offset (4); movl %ecx, %eax; \
5085cd1f UD	125	CDISABLE; popl %eax; cfi_adjust_cfa_offset (-4);
e700a908	126	# define POPSTATE_1 POPSTATE_0
5085cd1f UD	127	# define POPSTATE_2 xchgl (%esp), %eax; CDISABLE; popl %eax; \
5085cd1f UD	128	cfi_adjust_cfa_offset (-4);
09d65ff3 UD	129	# define POPSTATE_3 POPSTATE_2
	130	# define POPSTATE_4 POPSTATE_3
	131	# define POPSTATE_5 POPSTATE_4
11bf311e	132	# define POPSTATE_6 POPSTATE_5
6ee8d334	133
a4baf360	134	# ifndef __ASSEMBLER__
bd499a3b	135	# define SINGLE_THREAD_P \
55c11fbd RM	136	__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
55c11fbd RM	137	header.multiple_threads) == 0, 1)
bd499a3b UD	138	# else
	139	# define SINGLE_THREAD_P cmpl $0, %gs:MULTIPLE_THREADS_OFFSET
	140	# endif
86b2dc40	141
a4baf360	142	#elif !defined __ASSEMBLER__
86b2dc40	143
6e627806	144	# define SINGLE_THREAD_P (1)
ce6e047f	145	# define NO_CANCELLATION 1
86b2dc40 UD	146
86b2dc40 UD	147	#endif
6e627806 UD	148
	149	#ifndef __ASSEMBLER__
	150	# define RTLD_SINGLE_THREAD_P \
	151	__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
	152	header.multiple_threads) == 0, 1)
	153	#endif