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a334319f UD |
1 | /* Copyright (C) 1992, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 |
2 | Free Software Foundation, Inc. | |
cfc91acd RM |
3 | This file is part of the GNU C Library. |
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. */ | |
1e2f8718 | 19 | |
cfc91acd RM |
20 | /* Alan Modra <amodra@bigpond.net.au> rewrote the INLINE_SYSCALL macro */ |
21 | ||
22 | #ifndef _LINUX_POWERPC_SYSDEP_H | |
23 | #define _LINUX_POWERPC_SYSDEP_H 1 | |
24 | ||
25 | #include <sysdeps/unix/powerpc/sysdep.h> | |
26 | ||
27 | /* Define __set_errno() for INLINE_SYSCALL macro below. */ | |
28 | #ifndef __ASSEMBLER__ | |
29 | #include <errno.h> | |
30 | #endif | |
31 | ||
5bfed16d UD |
32 | /* Some systen calls got renamed over time, but retained the same semantics. |
33 | Handle them here so they can be catched by both C and assembler stubs in | |
34 | glibc. */ | |
35 | ||
36 | #ifdef __NR_pread64 | |
37 | # ifdef __NR_pread | |
38 | # error "__NR_pread and __NR_pread64 both defined???" | |
39 | # endif | |
40 | # define __NR_pread __NR_pread64 | |
41 | #endif | |
42 | ||
43 | #ifdef __NR_pwrite64 | |
44 | # ifdef __NR_pwrite | |
45 | # error "__NR_pwrite and __NR_pwrite64 both defined???" | |
46 | # endif | |
47 | # define __NR_pwrite __NR_pwrite64 | |
48 | #endif | |
49 | ||
cfc91acd RM |
50 | /* For Linux we can use the system call table in the header file |
51 | /usr/include/asm/unistd.h | |
52 | of the kernel. But these symbols do not follow the SYS_* syntax | |
53 | so we have to redefine the `SYS_ify' macro here. */ | |
54 | #undef SYS_ify | |
55 | #ifdef __STDC__ | |
56 | # define SYS_ify(syscall_name) __NR_##syscall_name | |
57 | #else | |
58 | # define SYS_ify(syscall_name) __NR_/**/syscall_name | |
59 | #endif | |
60 | ||
61 | #ifdef __ASSEMBLER__ | |
62 | ||
63 | /* This seems to always be the case on PPC. */ | |
a334319f | 64 | #define ALIGNARG(log2) log2 |
cfc91acd | 65 | /* For ELF we need the `.type' directive to make shared libs work right. */ |
a334319f UD |
66 | #define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg; |
67 | #define ASM_SIZE_DIRECTIVE(name) .size name,.-name | |
cfc91acd | 68 | |
a334319f | 69 | #endif /* __ASSEMBLER__ */ |
cfc91acd RM |
70 | |
71 | #undef INLINE_SYSCALL | |
cfc91acd | 72 | |
cfc91acd RM |
73 | /* This version is for kernels that implement system calls that |
74 | behave like function calls as far as register saving. */ | |
1e2f8718 UD |
75 | #define INLINE_SYSCALL(name, nr, args...) \ |
76 | ({ \ | |
574b892e | 77 | INTERNAL_SYSCALL_DECL (sc_err); \ |
c67a469f | 78 | long int sc_ret = INTERNAL_SYSCALL (name, sc_err, nr, args); \ |
574b892e UD |
79 | if (INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \ |
80 | { \ | |
81 | __set_errno (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err)); \ | |
82 | sc_ret = -1L; \ | |
83 | } \ | |
84 | sc_ret; \ | |
cfc91acd RM |
85 | }) |
86 | ||
aff4519d UD |
87 | /* Define a macro which expands inline into the wrapper code for a system |
88 | call. This use is for internal calls that do not need to handle errors | |
89 | normally. It will never touch errno. This returns just what the kernel | |
90 | gave back in the non-error (CR0.SO cleared) case, otherwise (CR0.SO set) | |
91 | the negation of the return value in the kernel gets reverted. */ | |
92 | ||
1e2f8718 | 93 | #undef INTERNAL_SYSCALL |
2edb61e3 | 94 | #define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \ |
aff4519d | 95 | ({ \ |
c67a469f UD |
96 | register long int r0 __asm__ ("r0"); \ |
97 | register long int r3 __asm__ ("r3"); \ | |
98 | register long int r4 __asm__ ("r4"); \ | |
99 | register long int r5 __asm__ ("r5"); \ | |
100 | register long int r6 __asm__ ("r6"); \ | |
101 | register long int r7 __asm__ ("r7"); \ | |
102 | register long int r8 __asm__ ("r8"); \ | |
a334319f | 103 | LOADARGS_##nr(name, args); \ |
aff4519d UD |
104 | __asm__ __volatile__ \ |
105 | ("sc\n\t" \ | |
574b892e | 106 | "mfcr %0\n\t" \ |
aff4519d UD |
107 | "0:" \ |
108 | : "=&r" (r0), \ | |
1e2f8718 UD |
109 | "=&r" (r3), "=&r" (r4), "=&r" (r5), \ |
110 | "=&r" (r6), "=&r" (r7), "=&r" (r8) \ | |
aff4519d | 111 | : ASM_INPUT_##nr \ |
1e2f8718 | 112 | : "r9", "r10", "r11", "r12", \ |
aff4519d | 113 | "cr0", "ctr", "memory"); \ |
574b892e UD |
114 | err = r0; \ |
115 | (int) r3; \ | |
aff4519d | 116 | }) |
2edb61e3 | 117 | #define INTERNAL_SYSCALL(name, err, nr, args...) \ |
a334319f | 118 | INTERNAL_SYSCALL_NCS (__NR_##name, err, nr, ##args) |
574b892e | 119 | |
1e2f8718 | 120 | #undef INTERNAL_SYSCALL_DECL |
c67a469f | 121 | #define INTERNAL_SYSCALL_DECL(err) long int err |
1e2f8718 UD |
122 | |
123 | #undef INTERNAL_SYSCALL_ERROR_P | |
124 | #define INTERNAL_SYSCALL_ERROR_P(val, err) \ | |
a334319f | 125 | (__builtin_expect (err & (1 << 28), 0)) |
574b892e | 126 | |
1e2f8718 UD |
127 | #undef INTERNAL_SYSCALL_ERRNO |
128 | #define INTERNAL_SYSCALL_ERRNO(val, err) (val) | |
aff4519d UD |
129 | |
130 | #define LOADARGS_0(name, dummy) \ | |
2edb61e3 | 131 | r0 = name |
c67a469f UD |
132 | #define LOADARGS_1(name, __arg1) \ |
133 | long int arg1 = (long int) (__arg1); \ | |
aff4519d | 134 | LOADARGS_0(name, 0); \ |
2edb61e3 | 135 | extern void __illegally_sized_syscall_arg1 (void); \ |
c67a469f | 136 | if (__builtin_classify_type (__arg1) != 5 && sizeof (__arg1) > 8) \ |
2edb61e3 | 137 | __illegally_sized_syscall_arg1 (); \ |
c67a469f UD |
138 | r3 = arg1 |
139 | #define LOADARGS_2(name, __arg1, __arg2) \ | |
140 | long int arg2 = (long int) (__arg2); \ | |
141 | LOADARGS_1(name, __arg1); \ | |
2edb61e3 | 142 | extern void __illegally_sized_syscall_arg2 (void); \ |
c67a469f | 143 | if (__builtin_classify_type (__arg2) != 5 && sizeof (__arg2) > 8) \ |
2edb61e3 | 144 | __illegally_sized_syscall_arg2 (); \ |
c67a469f UD |
145 | r4 = arg2 |
146 | #define LOADARGS_3(name, __arg1, __arg2, __arg3) \ | |
147 | long int arg3 = (long int) (__arg3); \ | |
148 | LOADARGS_2(name, __arg1, __arg2); \ | |
2edb61e3 | 149 | extern void __illegally_sized_syscall_arg3 (void); \ |
c67a469f | 150 | if (__builtin_classify_type (__arg3) != 5 && sizeof (__arg3) > 8) \ |
2edb61e3 | 151 | __illegally_sized_syscall_arg3 (); \ |
c67a469f UD |
152 | r5 = arg3 |
153 | #define LOADARGS_4(name, __arg1, __arg2, __arg3, __arg4) \ | |
154 | long int arg4 = (long int) (__arg4); \ | |
155 | LOADARGS_3(name, __arg1, __arg2, __arg3); \ | |
2edb61e3 | 156 | extern void __illegally_sized_syscall_arg4 (void); \ |
c67a469f | 157 | if (__builtin_classify_type (__arg4) != 5 && sizeof (__arg4) > 8) \ |
2edb61e3 | 158 | __illegally_sized_syscall_arg4 (); \ |
c67a469f UD |
159 | r6 = arg4 |
160 | #define LOADARGS_5(name, __arg1, __arg2, __arg3, __arg4, __arg5) \ | |
161 | long int arg5 = (long int) (__arg5); \ | |
162 | LOADARGS_4(name, __arg1, __arg2, __arg3, __arg4); \ | |
2edb61e3 | 163 | extern void __illegally_sized_syscall_arg5 (void); \ |
c67a469f | 164 | if (__builtin_classify_type (__arg5) != 5 && sizeof (__arg5) > 8) \ |
2edb61e3 | 165 | __illegally_sized_syscall_arg5 (); \ |
c67a469f UD |
166 | r7 = arg5 |
167 | #define LOADARGS_6(name, __arg1, __arg2, __arg3, __arg4, __arg5, __arg6) \ | |
168 | long int arg6 = (long int) (__arg6); \ | |
169 | LOADARGS_5(name, __arg1, __arg2, __arg3, __arg4, __arg5); \ | |
2edb61e3 | 170 | extern void __illegally_sized_syscall_arg6 (void); \ |
c67a469f | 171 | if (__builtin_classify_type (__arg6) != 5 && sizeof (__arg6) > 8) \ |
2edb61e3 | 172 | __illegally_sized_syscall_arg6 (); \ |
c67a469f | 173 | r8 = arg6 |
cfc91acd RM |
174 | |
175 | #define ASM_INPUT_0 "0" (r0) | |
176 | #define ASM_INPUT_1 ASM_INPUT_0, "1" (r3) | |
177 | #define ASM_INPUT_2 ASM_INPUT_1, "2" (r4) | |
178 | #define ASM_INPUT_3 ASM_INPUT_2, "3" (r5) | |
179 | #define ASM_INPUT_4 ASM_INPUT_3, "4" (r6) | |
180 | #define ASM_INPUT_5 ASM_INPUT_4, "5" (r7) | |
181 | #define ASM_INPUT_6 ASM_INPUT_5, "6" (r8) | |
182 | ||
cfc91acd | 183 | #endif /* linux/powerpc/powerpc64/sysdep.h */ |