1 /* Cancellable system call stubs. Linux/PowerPC version.
2 Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Franz Sirl <Franz.Sirl-kernel@lauterbach.com>, 2003.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
24 # include <nptl/pthreadP.h>
27 #if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
30 # define PSEUDO(name, syscall_name, args) \
35 bne- .Lpseudo_cancel; \
36 .type __##syscall_name##_nocancel,@function; \
37 .globl __##syscall_name##_nocancel; \
38 __##syscall_name##_nocancel: \
39 DO_CALL (SYS_ify (syscall_name)); \
41 .size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \
44 cfi_adjust_cfa_offset (48); \
49 DOCARGS_##args; /* save syscall args around CENABLE. */ \
51 stw 3,16(1); /* store CENABLE return value (MASK). */ \
52 UNDOCARGS_##args; /* restore syscall args. */ \
53 DO_CALL (SYS_ify (syscall_name)); \
54 mfcr 0; /* save CR/R3 around CDISABLE. */ \
57 lwz 3,16(1); /* pass MASK to CDISABLE. */ \
60 lwz 0,12(1); /* restore CR/R3. */ \
71 # define DOCARGS_1 stw 3,20(1); DOCARGS_0
72 # define UNDOCARGS_1 lwz 3,20(1); UNDOCARGS_0
74 # define DOCARGS_2 stw 4,24(1); DOCARGS_1
75 # define UNDOCARGS_2 lwz 4,24(1); UNDOCARGS_1
77 # define DOCARGS_3 stw 5,28(1); DOCARGS_2
78 # define UNDOCARGS_3 lwz 5,28(1); UNDOCARGS_2
80 # define DOCARGS_4 stw 6,32(1); DOCARGS_3
81 # define UNDOCARGS_4 lwz 6,32(1); UNDOCARGS_3
83 # define DOCARGS_5 stw 7,36(1); DOCARGS_4
84 # define UNDOCARGS_5 lwz 7,36(1); UNDOCARGS_4
86 # define DOCARGS_6 stw 8,40(1); DOCARGS_5
87 # define UNDOCARGS_6 lwz 8,40(1); UNDOCARGS_5
92 # ifdef IS_IN_libpthread
93 # define CENABLE bl __pthread_enable_asynccancel@local
94 # define CDISABLE bl __pthread_disable_asynccancel@local
95 # elif !defined NOT_IN_libc
96 # define CENABLE bl __libc_enable_asynccancel@local
97 # define CDISABLE bl __libc_disable_asynccancel@local
98 # elif defined IS_IN_librt
99 # define CENABLE bl JUMPTARGET(__librt_enable_asynccancel)
100 # define CDISABLE bl JUMPTARGET(__librt_disable_asynccancel)
101 # if defined HAVE_AS_REL16 && defined __PIC__
107 addis 30,30,_GLOBAL_OFFSET_TABLE-1b@ha; \
108 addi 30,30,_GLOBAL_OFFSET_TABLE-1b@l
110 # define CGOTRESTORE \
114 # error Unsupported library
117 # ifndef __ASSEMBLER__
118 # define SINGLE_THREAD_P \
119 __builtin_expect (THREAD_GETMEM (THREAD_SELF, \
120 header.multiple_threads) == 0, 1)
122 # define SINGLE_THREAD_P \
123 lwz 10,MULTIPLE_THREADS_OFFSET(2); \
127 #elif !defined __ASSEMBLER__
129 # define SINGLE_THREAD_P (1)
130 # define NO_CANCELLATION 1