summaryrefslogtreecommitdiff
path: root/libpthread/nptl/sysdeps/unix/sysv/linux/sh/sysdep-cancel.h
blob: dbaa44385dea4a5ca67f80437a110260b4b7882a (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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
/* Copyright (C) 2003, 2004 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 <tls.h>
#include <sysdep.h>
#ifndef __ASSEMBLER__
# include <pthreadP.h>
#endif

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

# define _IMM12 #-12
# define _IMM16 #-16
# define _IMP16 #16
# undef PSEUDO
# define PSEUDO(name, syscall_name, args) \
  .text; \
  ENTRY (name); \
  .Lpseudo_start: \
    SINGLE_THREAD_P; \
    bf .Lpseudo_cancel; \
    .type __##syscall_name##_nocancel,@function; \
    .globl __##syscall_name##_nocancel; \
    __##syscall_name##_nocancel: \
    DO_CALL (syscall_name, args); \
    mov r0,r1; \
    mov _IMM12,r2; \
    shad r2,r1; \
    not r1,r1; \
    tst r1,r1; \
    bt .Lsyscall_error; \
    bra .Lpseudo_end; \
     nop; \
    .size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \
 .Lpseudo_cancel: \
    sts.l pr,@-r15; \
 .LCFI0: \
    add _IMM16,r15; \
    SAVE_ARGS_##args; \
 .LCFI1: \
    CENABLE; \
    LOAD_ARGS_##args; \
    add _IMP16,r15; \
 .LCFI2: \
    lds.l @r15+,pr; \
 .LCFI3: \
    DO_CALL(syscall_name, args); \
    SYSCALL_INST_PAD; \
    sts.l pr,@-r15; \
 .LCFI4: \
    mov.l r0,@-r15; \
 .LCFI5: \
    CDISABLE; \
    mov.l @r15+,r0; \
 .LCFI6: \
    lds.l @r15+,pr; \
 .LCFI7: \
    mov r0,r1; \
    mov _IMM12,r2; \
    shad r2,r1; \
    not r1,r1; \
    tst r1,r1; \
    bf .Lpseudo_end; \
 .Lsyscall_error: \
    SYSCALL_ERROR_HANDLER; \
 .Lpseudo_end: \
 /* Create unwinding information for the syscall wrapper.  */ \
 .section .eh_frame,"a",@progbits; \
 .Lframe1: \
    .ualong .LECIE1-.LSCIE1; \
 .LSCIE1: \
    .ualong 0x0; \
    .byte   0x1; \
    AUGMENTATION_STRING; \
    .uleb128 0x1; \
    .sleb128 -4; \
    .byte   0x11; \
    AUGMENTATION_PARAM; \
    .byte   0xc; \
    .uleb128 0xf; \
    .uleb128 0x0; \
    .align 2; \
 .LECIE1: \
 .LSFDE1: \
    .ualong .LEFDE1-.LASFDE1; \
 .LASFDE1: \
    .ualong .LASFDE1-.Lframe1; \
    START_SYMBOL_REF; \
    .ualong .Lpseudo_end - .Lpseudo_start; \
    AUGMENTATION_PARAM_FDE; \
    .byte   0x4; \
    .ualong .LCFI0-.Lpseudo_start; \
    .byte   0xe; \
    .uleb128 0x4; \
    .byte   0x91; \
    .uleb128 0x1; \
    .byte   0x4; \
    .ualong .LCFI1-.LCFI0; \
    .byte   0xe; \
    .uleb128 0x14; \
    FRAME_REG_##args; \
    .byte   0x4; \
    .ualong .LCFI2-.LCFI1; \
    .byte   0xe; \
    .uleb128 0x4; \
    .byte   0x4; \
    .ualong .LCFI3-.LCFI2; \
    .byte   0xe; \
    .uleb128 0x0; \
    .byte   0xd1; \
    .byte   0x4; \
    .ualong .LCFI4-.LCFI3; \
    .byte   0xe; \
    .uleb128 0x4; \
    .byte   0x91; \
    .uleb128 0x1; \
    .byte   0x4; \
    .ualong .LCFI5-.LCFI4; \
    .byte   0xe; \
    .uleb128 0x8; \
    .byte   0x80; \
    .uleb128 0x2; \
    .byte   0x4; \
    .ualong .LCFI6-.LCFI5; \
    .byte   0xe; \
    .uleb128 0x4; \
    .byte   0xc0; \
    .byte   0x4; \
    .ualong .LCFI7-.LCFI6; \
    .byte   0xe; \
    .uleb128 0x0; \
    .byte   0xd1; \
    .align 2; \
 .LEFDE1: \
 .previous

# ifdef SHARED
#  define AUGMENTATION_STRING .string "zR"
#  define AUGMENTATION_PARAM .uleb128 1; .byte 0x1b
#  define AUGMENTATION_PARAM_FDE .uleb128 0
#  define START_SYMBOL_REF .long .Lpseudo_start-.
# else
#  define AUGMENTATION_STRING .ascii "\0"
#  define AUGMENTATION_PARAM
#  define AUGMENTATION_PARAM_FDE
#  define START_SYMBOL_REF .long .Lpseudo_start
# endif

# define FRAME_REG_0	/* Nothing.  */
# define FRAME_REG_1	FRAME_REG_0; .byte 0x84; .uleb128 5
# define FRAME_REG_2	FRAME_REG_1; .byte 0x85; .uleb128 4
# define FRAME_REG_3	FRAME_REG_2; .byte 0x86; .uleb128 3
# define FRAME_REG_4	FRAME_REG_3; .byte 0x87; .uleb128 2
# define FRAME_REG_5	FRAME_REG_4
# define FRAME_REG_6	FRAME_REG_5

# undef PSEUDO_END
# define PSEUDO_END(sym) \
  END (sym)

# define SAVE_ARGS_0	/* Nothing.  */
# define SAVE_ARGS_1	SAVE_ARGS_0; mov.l r4,@(0,r15)
# define SAVE_ARGS_2	SAVE_ARGS_1; mov.l r5,@(4,r15)
# define SAVE_ARGS_3	SAVE_ARGS_2; mov.l r6,@(8,r15)
# define SAVE_ARGS_4	SAVE_ARGS_3; mov.l r7,@(12,r15)
# define SAVE_ARGS_5	SAVE_ARGS_4
# define SAVE_ARGS_6	SAVE_ARGS_5

# define LOAD_ARGS_0	/* Nothing.  */
# define LOAD_ARGS_1	LOAD_ARGS_0; mov.l @(0,r15),r4
# define LOAD_ARGS_2	LOAD_ARGS_1; mov.l @(4,r15),r5
# define LOAD_ARGS_3	LOAD_ARGS_2; mov.l @(8,r15),r6
# define LOAD_ARGS_4	LOAD_ARGS_3; mov.l @(12,r15),r7
# define LOAD_ARGS_5	LOAD_ARGS_4
# define LOAD_ARGS_6	LOAD_ARGS_5

# ifdef IS_IN_libpthread
#  define __local_enable_asynccancel	__pthread_enable_asynccancel
#  define __local_disable_asynccancel	__pthread_disable_asynccancel
# elif !defined NOT_IN_libc
#  define __local_enable_asynccancel	__libc_enable_asynccancel
#  define __local_disable_asynccancel	__libc_disable_asynccancel
# elif defined IS_IN_librt
#  define __local_enable_asynccancel	__librt_enable_asynccancel
#  define __local_disable_asynccancel	__librt_disable_asynccancel
# else
#  error Unsupported library
# endif

# define CENABLE \
	mov.l 1f,r0; \
	bsrf r0; \
	 nop; \
     0: bra 2f; \
	 mov r0,r2; \
	.align 2; \
     1: .long __local_enable_asynccancel - 0b; \
     2:

# define CDISABLE \
	mov.l 1f,r0; \
	bsrf r0; \
	 mov r2,r4; \
     0: bra 2f; \
	 nop; \
	.align 2; \
     1: .long __local_disable_asynccancel - 0b; \
     2:

# ifndef __ASSEMBLER__
#  define SINGLE_THREAD_P \
  __builtin_expect (THREAD_GETMEM (THREAD_SELF, \
				   header.multiple_threads) == 0, 1)
# else
#  define SINGLE_THREAD_P \
	stc gbr,r0; \
	mov.w 0f,r1; \
	sub r1,r0; \
	mov.l @(MULTIPLE_THREADS_OFFSET,r0),r0; \
	bra 1f; \
	 tst r0,r0; \
     0: .word TLS_PRE_TCB_SIZE; \
     1:

# endif

#elif !defined __ASSEMBLER__

# define SINGLE_THREAD_P (1)
# define NO_CANCELLATION 1

#endif