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f3c13160 | 1 | /* Cancellable system call stubs. Linux/PowerPC version. |
0470fa46 | 2 | Copyright (C) 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. |
f3c13160 RM |
3 | This file is part of the GNU C Library. |
4 | Contributed by Franz Sirl <Franz.Sirl-kernel@lauterbach.com>, 2003. | |
5 | ||
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. | |
10 | ||
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. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ | |
f3c13160 RM |
19 | |
20 | #include <sysdep.h> | |
21 | #include <tls.h> | |
22 | #ifndef __ASSEMBLER__ | |
23 | # include <nptl/pthreadP.h> | |
24 | #endif | |
25 | ||
7a114794 | 26 | #if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt |
f3c13160 RM |
27 | |
28 | # undef PSEUDO | |
29 | # define PSEUDO(name, syscall_name, args) \ | |
30 | .section ".text"; \ | |
31 | ENTRY (name) \ | |
32 | SINGLE_THREAD_P; \ | |
33 | bne- .Lpseudo_cancel; \ | |
5777d565 UD |
34 | .type __##syscall_name##_nocancel,@function; \ |
35 | .globl __##syscall_name##_nocancel; \ | |
36 | __##syscall_name##_nocancel: \ | |
f3c13160 RM |
37 | DO_CALL (SYS_ify (syscall_name)); \ |
38 | PSEUDO_RET; \ | |
5777d565 | 39 | .size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \ |
f3c13160 RM |
40 | .Lpseudo_cancel: \ |
41 | stwu 1,-48(1); \ | |
6080ecdf | 42 | cfi_adjust_cfa_offset (48); \ |
f3c13160 RM |
43 | mflr 9; \ |
44 | stw 9,52(1); \ | |
6080ecdf | 45 | cfi_offset (lr, 4); \ |
f3c13160 RM |
46 | DOCARGS_##args; /* save syscall args around CENABLE. */ \ |
47 | CENABLE; \ | |
48 | stw 3,16(1); /* store CENABLE return value (MASK). */ \ | |
49 | UNDOCARGS_##args; /* restore syscall args. */ \ | |
50 | DO_CALL (SYS_ify (syscall_name)); \ | |
51 | mfcr 0; /* save CR/R3 around CDISABLE. */ \ | |
52 | stw 3,8(1); \ | |
53 | stw 0,12(1); \ | |
54 | lwz 3,16(1); /* pass MASK to CDISABLE. */ \ | |
55 | CDISABLE; \ | |
56 | lwz 4,52(1); \ | |
57 | lwz 0,12(1); /* restore CR/R3. */ \ | |
58 | lwz 3,8(1); \ | |
59 | mtlr 4; \ | |
60 | mtcr 0; \ | |
9759bbf1 | 61 | addi 1,1,48; |
f3c13160 RM |
62 | |
63 | # define DOCARGS_0 | |
64 | # define UNDOCARGS_0 | |
65 | ||
66 | # define DOCARGS_1 stw 3,20(1); DOCARGS_0 | |
67 | # define UNDOCARGS_1 lwz 3,20(1); UNDOCARGS_0 | |
68 | ||
69 | # define DOCARGS_2 stw 4,24(1); DOCARGS_1 | |
70 | # define UNDOCARGS_2 lwz 4,24(1); UNDOCARGS_1 | |
71 | ||
72 | # define DOCARGS_3 stw 5,28(1); DOCARGS_2 | |
73 | # define UNDOCARGS_3 lwz 5,28(1); UNDOCARGS_2 | |
74 | ||
75 | # define DOCARGS_4 stw 6,32(1); DOCARGS_3 | |
76 | # define UNDOCARGS_4 lwz 6,32(1); UNDOCARGS_3 | |
77 | ||
78 | # define DOCARGS_5 stw 7,36(1); DOCARGS_4 | |
79 | # define UNDOCARGS_5 lwz 7,36(1); UNDOCARGS_4 | |
80 | ||
81 | # define DOCARGS_6 stw 8,40(1); DOCARGS_5 | |
82 | # define UNDOCARGS_6 lwz 8,40(1); UNDOCARGS_5 | |
83 | ||
84 | # ifdef IS_IN_libpthread | |
b0e196a4 UD |
85 | # define CENABLE bl __pthread_enable_asynccancel@local |
86 | # define CDISABLE bl __pthread_disable_asynccancel@local | |
bbde8527 | 87 | # elif !defined NOT_IN_libc |
b0e196a4 UD |
88 | # define CENABLE bl __libc_enable_asynccancel@local |
89 | # define CDISABLE bl __libc_disable_asynccancel@local | |
bbde8527 | 90 | # elif defined IS_IN_librt |
0470fa46 JJ |
91 | # define CENABLE bl __librt_enable_asynccancel@local |
92 | # define CDISABLE bl __librt_disable_asynccancel@local | |
bbde8527 UD |
93 | # else |
94 | # error Unsupported library | |
f3c13160 RM |
95 | # endif |
96 | ||
97 | # ifndef __ASSEMBLER__ | |
98 | # define SINGLE_THREAD_P \ | |
468777e1 UD |
99 | __builtin_expect (THREAD_GETMEM (THREAD_SELF, \ |
100 | header.multiple_threads) == 0, 1) | |
f3c13160 RM |
101 | # else |
102 | # define SINGLE_THREAD_P \ | |
103 | lwz 10,MULTIPLE_THREADS_OFFSET(2); \ | |
104 | cmpwi 10,0 | |
105 | # endif | |
106 | ||
107 | #elif !defined __ASSEMBLER__ | |
108 | ||
6e627806 | 109 | # define SINGLE_THREAD_P (1) |
ce6e047f | 110 | # define NO_CANCELLATION 1 |
f3c13160 RM |
111 | |
112 | #endif | |
6e627806 UD |
113 | |
114 | #ifndef __ASSEMBLER__ | |
115 | # define RTLD_SINGLE_THREAD_P \ | |
116 | __builtin_expect (THREAD_GETMEM (THREAD_SELF, \ | |
117 | header.multiple_threads) == 0, 1) | |
118 | #endif |