9a70b64a6922b81402a5cba4e758f90e9d575549
[kopensolaris-gnu/glibc.git] / linuxthreads / sysdeps / unix / sysv / linux / powerpc / powerpc32 / sysdep-cancel.h
1 /* Copyright (C) 2003 Free Software Foundation, Inc.
2    This file is part of the GNU C Library.
3    Contributed by Franz Sirl <Franz.Sirl-kernel@lauterbach.com>, 2003.
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
16    License along with the GNU C Library; if not, write to the Free
17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18    02111-1307 USA.  */
19
20 #include <sysdep.h>
21 #ifndef __ASSEMBLER__
22 # include <linuxthreads/internals.h>
23 #endif
24
25 #if !defined NOT_IN_libc || defined IS_IN_libpthread
26
27 # undef PSEUDO
28 # define PSEUDO(name, syscall_name, args)                               \
29   .section ".text";                                                     \
30   ENTRY (name)                                                          \
31     SINGLE_THREAD_P;                                                    \
32     bne- .Lpseudo_cancel;                                               \
33     DO_CALL (SYS_ify (syscall_name));                                   \
34     PSEUDO_RET;                                                         \
35   .Lpseudo_cancel:                                                      \
36     stwu 1,-48(1);                                                      \
37     mflr 9;                                                             \
38     stw 9,52(1);                                                        \
39     DOCARGS_##args;     /* save syscall args around CENABLE.  */        \
40     CENABLE;                                                            \
41     stw 3,16(1);        /* store CENABLE return value (MASK).  */       \
42     UNDOCARGS_##args;   /* restore syscall args.  */                    \
43     DO_CALL (SYS_ify (syscall_name));                                   \
44     mfcr 0;             /* save CR/R3 around CDISABLE.  */              \
45     stw 3,8(1);                                                         \
46     stw 0,12(1);                                                        \
47     lwz 3,16(1);        /* pass MASK to CDISABLE.  */                   \
48     CDISABLE;                                                           \
49     lwz 4,52(1);                                                        \
50     lwz 0,12(1);        /* restore CR/R3. */                            \
51     lwz 3,8(1);                                                         \
52     mtlr 4;                                                             \
53     mtcr 0;                                                             \
54     addi 1,1,48;
55
56 # define DOCARGS_0
57 # define UNDOCARGS_0
58
59 # define DOCARGS_1      stw 3,20(1); DOCARGS_0
60 # define UNDOCARGS_1    lwz 3,20(1); UNDOCARGS_0
61
62 # define DOCARGS_2      stw 4,24(1); DOCARGS_1
63 # define UNDOCARGS_2    lwz 4,24(1); UNDOCARGS_1
64
65 # define DOCARGS_3      stw 5,28(1); DOCARGS_2
66 # define UNDOCARGS_3    lwz 5,28(1); UNDOCARGS_2
67
68 # define DOCARGS_4      stw 6,32(1); DOCARGS_3
69 # define UNDOCARGS_4    lwz 6,32(1); UNDOCARGS_3
70
71 # define DOCARGS_5      stw 7,36(1); DOCARGS_4
72 # define UNDOCARGS_5    lwz 7,36(1); UNDOCARGS_4
73
74 # ifdef IS_IN_libpthread
75 #  define CENABLE       bl JUMPTARGET(__pthread_enable_asynccancel)
76 #  define CDISABLE      bl JUMPTARGET(__pthread_disable_asynccancel)
77 #  define __local_multiple_threads __pthread_multiple_threads
78 # else
79 #  define CENABLE       bl JUMPTARGET(__libc_enable_asynccancel)
80 #  define CDISABLE      bl JUMPTARGET(__libc_disable_asynccancel)
81 #  define __local_multiple_threads __libc_multiple_threads
82 # endif
83
84 # ifndef __ASSEMBLER__
85 extern int __local_multiple_threads attribute_hidden;
86 #  define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
87 # else
88 #  if !defined PIC
89 #   define SINGLE_THREAD_P                                              \
90   lis 10,__local_multiple_threads@ha;                                   \
91   lwz 10,__local_multiple_threads@l(10);                                \
92   cmpwi 10,0
93 #  else
94 #   define SINGLE_THREAD_P                                              \
95   mflr 9;                                                               \
96   bl _GLOBAL_OFFSET_TABLE_@local-4;                                     \
97   mflr 10;                                                              \
98   mtlr 9;                                                               \
99   lwz 10,__local_multiple_threads@got(10);                              \
100   lwz 10,0(10);                                                         \
101   cmpwi 10,0
102 #  endif
103 # endif
104
105 #elif !defined __ASSEMBLER__
106
107 /* This code should never be used but we define it anyhow.  */
108 # define SINGLE_THREAD_P (1)
109
110 #endif