summaryrefslogtreecommitdiff
path: root/libpthread/linuxthreads/sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h
blob: 9ea779e0d55de750af6833f6749e49837caddf5b (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
/* Copyright (C) 2003 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   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>
#ifndef __ASSEMBLER__
# include <linuxthreads/internals.h>
#endif

#if !defined NOT_IN_libc || defined IS_IN_libpthread

# ifdef PROF
#  define PSEUDO_PROF				\
	.set noat;				\
	lda	AT, _mcount;			\
	jsr	AT, (AT), _mcount;		\
	.set at
# else
#  define PSEUDO_PROF
# endif

/* ??? Assumes that nothing comes between PSEUDO and PSEUDO_END
   besides "ret".  */

# undef PSEUDO
# define PSEUDO(name, syscall_name, args)			\
	.globl name;						\
	.align 4;						\
	.type name, @function;					\
	.usepv name, std;					\
	cfi_startproc;						\
__LABEL(name)							\
	ldgp	gp, 0(pv);					\
	PSEUDO_PROF;						\
	PSEUDO_PREPARE_ARGS					\
	SINGLE_THREAD_P(t0);					\
	bne	t0, $pseudo_cancel;				\
	lda	v0, SYS_ify(syscall_name);			\
	call_pal PAL_callsys;					\
	bne	a3, SYSCALL_ERROR_LABEL;			\
__LABEL($pseudo_ret)						\
	.subsection 2;						\
__LABEL($pseudo_cancel)						\
	subq	sp, 64, sp;					\
	cfi_def_cfa_offset(64);					\
	stq	ra, 0(sp);					\
	cfi_offset(ra, -64);					\
	SAVE_ARGS_##args;					\
	CENABLE;						\
	LOAD_ARGS_##args;					\
	lda	v0, SYS_ify(syscall_name);			\
	call_pal PAL_callsys;					\
	stq	v0, 8(sp);					\
	bne	a3, $multi_error;				\
	CDISABLE;						\
	ldq	ra, 0(sp);					\
	ldq	v0, 8(sp);					\
	addq	sp, 64, sp;					\
	cfi_remember_state;					\
	cfi_restore(ra);					\
	cfi_def_cfa_offset(0);					\
	ret;							\
	cfi_restore_state;					\
__LABEL($multi_error)						\
	CDISABLE;						\
	ldq	ra, 0(sp);					\
	ldq	v0, 8(sp);					\
	addq	sp, 64, sp;					\
	cfi_restore(ra);					\
	cfi_def_cfa_offset(0);					\
__LABEL($syscall_error)						\
	SYSCALL_ERROR_HANDLER;					\
	.previous

# undef PSEUDO_END
# define PSEUDO_END(sym)					\
	.subsection 2;						\
	cfi_endproc;						\
	.size sym, .-sym

# define SAVE_ARGS_0	/* Nothing.  */
# define SAVE_ARGS_1	SAVE_ARGS_0; stq a0, 8(sp)
# define SAVE_ARGS_2	SAVE_ARGS_1; stq a1, 16(sp)
# define SAVE_ARGS_3	SAVE_ARGS_2; stq a2, 24(sp)
# define SAVE_ARGS_4	SAVE_ARGS_3; stq a3, 32(sp)
# define SAVE_ARGS_5	SAVE_ARGS_4; stq a4, 40(sp)
# define SAVE_ARGS_6	SAVE_ARGS_5; stq a5, 48(sp)

# define LOAD_ARGS_0	/* Nothing.  */
# define LOAD_ARGS_1	LOAD_ARGS_0; ldq a0, 8(sp)
# define LOAD_ARGS_2	LOAD_ARGS_1; ldq a1, 16(sp)
# define LOAD_ARGS_3	LOAD_ARGS_2; ldq a2, 24(sp)
# define LOAD_ARGS_4	LOAD_ARGS_3; ldq a3, 32(sp)
# define LOAD_ARGS_5	LOAD_ARGS_4; ldq a4, 40(sp)
# define LOAD_ARGS_6	LOAD_ARGS_5; ldq a5, 48(sp)

# ifdef IS_IN_libpthread
#  define __local_enable_asynccancel	__pthread_enable_asynccancel
#  define __local_disable_asynccancel	__pthread_disable_asynccancel
#  define __local_multiple_threads	__pthread_multiple_threads
# else
#  define __local_enable_asynccancel	__libc_enable_asynccancel
#  define __local_disable_asynccancel	__libc_disable_asynccancel
#  define __local_multiple_threads	__libc_multiple_threads
# endif

# ifdef PIC
#  define CENABLE	bsr ra, __local_enable_asynccancel !samegp
#  define CDISABLE	bsr ra, __local_disable_asynccancel !samegp
# else
#  define CENABLE	jsr ra, __local_enable_asynccancel; ldgp ra, 0(gp)
#  define CDISABLE	jsr ra, __local_disable_asynccancel; ldgp ra, 0(gp)
# endif

# ifndef __ASSEMBLER__
extern int __local_multiple_threads attribute_hidden;
#   define SINGLE_THREAD_P \
  __builtin_expect (__local_multiple_threads == 0, 1)
# elif defined(PIC)
#  define SINGLE_THREAD_P(reg)  ldl reg, __local_multiple_threads(gp) !gprel
# else
#  define SINGLE_THREAD_P(reg)					\
	ldah	reg, __local_multiple_threads(gp) !gprelhigh;	\
	ldl	reg, __local_multiple_threads(reg) !gprellow
# endif

#elif !defined __ASSEMBLER__

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

#endif