aboutsummaryrefslogtreecommitdiff
path: root/linuxthreads/sysdeps/unix/sysv/linux/i386/sysdep-cancel.h
blob: 3fdec5d6ddd2f405248c745b1e77f76d3e8ec589 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
/* Copyright (C) 2002, 2003 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, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <sysdep.h>
#include <tls.h>
#include <pt-machine.h>
#ifndef __ASSEMBLER__
# include <linuxthreads/internals.h>
#endif

#if !defined NOT_IN_libc || defined IS_IN_libpthread

# undef PSEUDO
# define PSEUDO(name, syscall_name, args)				      \
  .text;								      \
  ENTRY (name)								      \
    SINGLE_THREAD_P;							      \
    jne L(pseudo_cancel);						      \
    DO_CALL (syscall_name, args);					      \
    cmpl $-4095, %eax;							      \
    jae SYSCALL_ERROR_LABEL;						      \
    ret;								      \
  L(pseudo_cancel):							      \
    CENABLE								      \
    SAVE_OLDTYPE_##args							      \
    PUSHCARGS_##args							      \
    DOCARGS_##args							      \
    movl $SYS_ify (syscall_name), %eax;					      \
    int $0x80								      \
    POPCARGS_##args;							      \
    POPSTATE_##args							      \
    cmpl $-4095, %eax;							      \
    jae SYSCALL_ERROR_LABEL;						      \
  L(pseudo_end):

# define SAVE_OLDTYPE_0	movl %eax, %edx;
# define SAVE_OLDTYPE_1	SAVE_OLDTYPE_0
# define SAVE_OLDTYPE_2	pushl %eax;
# define SAVE_OLDTYPE_3	SAVE_OLDTYPE_2
# define SAVE_OLDTYPE_4	SAVE_OLDTYPE_2
# define SAVE_OLDTYPE_5	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; PUSHCARGS_0
# define DOCARGS_1	_DOARGS_1 (4)
# define POPCARGS_1	POPCARGS_0; movl %edx, %ebx
# define _PUSHCARGS_1	pushl %ebx; L(PUSHBX2): _PUSHCARGS_0
# define _POPCARGS_1	_POPCARGS_0; popl %ebx; L(POPBX2):

# 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; L(PUSHSI2): _PUSHCARGS_3
# define _POPCARGS_4	_POPCARGS_3; popl %esi; L(POPSI2):

# define PUSHCARGS_5	_PUSHCARGS_5
# define DOCARGS_5	_DOARGS_5 (36)
# define POPCARGS_5	_POPCARGS_5
# define _PUSHCARGS_5	pushl %edi; L(PUSHDI2): _PUSHCARGS_4
# define _POPCARGS_5	_POPCARGS_4; popl %edi; L(POPDI2):

# ifdef IS_IN_libpthread
#  define CENABLE	call __pthread_enable_asynccancel;
#  define CDISABLE	call __pthread_disable_asynccancel
# else
#  define CENABLE	call __libc_enable_asynccancel;
#  define CDISABLE	call __libc_disable_asynccancel
# endif
# define POPSTATE_0	pushl %eax; movl %ecx, %eax; CDISABLE; popl %eax;
# define POPSTATE_1	POPSTATE_0
# define POPSTATE_2	xchgl (%esp), %eax; CDISABLE; popl %eax;
# define POPSTATE_3	POPSTATE_2
# define POPSTATE_4	POPSTATE_2
# define POPSTATE_5	POPSTATE_2

#if !defined NOT_IN_libc
# define __local_multiple_threads __libc_multiple_threads
#else
# define __local_multiple_threads __pthread_multiple_threads
#endif

# ifndef __ASSEMBLER__
#  if defined FLOATING_STACKS && USE___THREAD && defined PIC
#   define SINGLE_THREAD_P \
  __builtin_expect (THREAD_GETMEM (THREAD_SELF,				      \
				   p_header.data.multiple_threads) == 0, 1)
#  else
extern int __local_multiple_threads attribute_hidden;
#   define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
#  endif
# else
#  if !defined PIC
#   define SINGLE_THREAD_P cmpl $0, __local_multiple_threads
#  elif defined FLOATING_STACKS && USE___THREAD
#   define SINGLE_THREAD_P cmpl $0, %gs:MULTIPLE_THREADS_OFFSET
#  else
#   if !defined HAVE_HIDDEN || !USE___THREAD
#    define SINGLE_THREAD_P \
  SETUP_PIC_REG (cx);				\
  addl $_GLOBAL_OFFSET_TABLE_, %ecx;		\
  cmpl $0, __local_multiple_threads@GOTOFF(%ecx)
#   else
#    define SINGLE_THREAD_P \
  call __i686.get_pc_thunk.cx;			\
  addl $_GLOBAL_OFFSET_TABLE_, %ecx;		\
  cmpl $0, __local_multiple_threads@GOTOFF(%ecx)
#   endif
#  endif
# endif

#elif !defined __ASSEMBLER__

/* This code should never be used but we define it anyhow.  */
# define SINGLE_THREAD_P (1)

#endif