about summary refs log tree commit diff
path: root/sysdeps/unix/sysv/linux/s390/s390-32/sysdep-cancel.h
blob: b1e80bcfcdd1dc59a5695690b337225f83b2411a (plain) (blame)
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
/* Copyright (C) 2003-2017 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.

   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 IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)

# undef PSEUDO
# define PSEUDO(name, syscall_name, args)				      \
	.text;								      \
L(pseudo_cancel):							      \
	cfi_startproc;							      \
	STM_##args							      \
	stm	%r12,%r15,48(%r15);					      \
	cfi_offset (%r15, -36);						      \
	cfi_offset (%r14, -40);						      \
	cfi_offset (%r13, -44);						      \
	cfi_offset (%r12, -48);						      \
	lr	%r14,%r15;						      \
	ahi	%r15,-96;						      \
	cfi_adjust_cfa_offset (96);					      \
	st	%r14,0(%r15);						      \
	basr    %r13,0;							      \
0:	l	%r1,1f-0b(%r13);					      \
	bas	%r14,0(%r1,%r13);					      \
	lr	%r0,%r2;						      \
	LM_##args							      \
	.if SYS_ify (syscall_name) < 256;				      \
	svc SYS_ify (syscall_name);					      \
	.else;								      \
	lhi %r1,SYS_ify (syscall_name);					      \
	svc 0;								      \
	.endif;								      \
	LR7_##args							      \
	l	%r1,2f-0b(%r13);					      \
	lr	%r12,%r2;						      \
	lr	%r2,%r0;						      \
	bas	%r14,0(%r1,%r13);					      \
	lr	%r2,%r12;						      \
	lm	%r12,%r15,48+96(%r15);					      \
	cfi_endproc;							      \
	j	L(pseudo_check);					      \
1:	.long	CENABLE-0b;						      \
2:	.long	CDISABLE-0b;						      \
ENTRY(name)								      \
	SINGLE_THREAD_P(%r1)						      \
	jne	L(pseudo_cancel);					      \
.type	__##syscall_name##_nocancel,@function;				      \
.globl	__##syscall_name##_nocancel;					      \
__##syscall_name##_nocancel:						      \
	DO_CALL(syscall_name, args);					      \
L(pseudo_check):							      \
	lhi	%r4,-4095;						      \
	clr	%r2,%r4;						      \
	jnl	SYSCALL_ERROR_LABEL;					      \
.size	__##syscall_name##_nocancel,.-__##syscall_name##_nocancel;	      \
L(pseudo_end):

# if IS_IN (libpthread)
#  define CENABLE	__pthread_enable_asynccancel
#  define CDISABLE	__pthread_disable_asynccancel
# elif IS_IN (libc)
#  define CENABLE	__libc_enable_asynccancel
#  define CDISABLE	__libc_disable_asynccancel
# elif IS_IN (librt)
#  define CENABLE	__librt_enable_asynccancel
#  define CDISABLE	__librt_disable_asynccancel
# else
#  error Unsupported library
# endif

#define STM_0		/* Nothing */
#define STM_1		st %r2,8(%r15);
#define STM_2		stm %r2,%r3,8(%r15);
#define STM_3		stm %r2,%r4,8(%r15);
#define STM_4		stm %r2,%r5,8(%r15);
#define STM_5		stm %r2,%r5,8(%r15);
#define STM_6		stm %r2,%r7,8(%r15);

#define LM_0		/* Nothing */
#define LM_1		l %r2,8+96(%r15);
#define LM_2		lm %r2,%r3,8+96(%r15);
#define LM_3		lm %r2,%r4,8+96(%r15);
#define LM_4		lm %r2,%r5,8+96(%r15);
#define LM_5		lm %r2,%r5,8+96(%r15);
#define LM_6		lm %r2,%r5,8+96(%r15); \
			cfi_offset (%r7, -68); \
			l %r7,96+96(%r15);

#define LR7_0		/* Nothing */
#define LR7_1		/* Nothing */
#define LR7_2		/* Nothing */
#define LR7_3		/* Nothing */
#define LR7_4		/* Nothing */
#define LR7_5		/* Nothing */
#define LR7_6		l %r7,28+96(%r15); \
			cfi_restore (%r7);

# ifndef __ASSEMBLER__
#  define SINGLE_THREAD_P \
  __builtin_expect (THREAD_GETMEM (THREAD_SELF,				      \
				   header.multiple_threads) == 0, 1)
# else
#  define SINGLE_THREAD_P(reg) \
	ear	reg,%a0;						      \
	icm	reg,15,MULTIPLE_THREADS_OFFSET(reg);
# 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