1 /* vi: set sw=4 ts=4: */
3 * Copyright (C) 2000-2005 by Erik Andersen <andersen@codepoet.org>
5 * GNU Lesser General Public License version 2.1 or later.
11 /* We can't use the real errno in ldso, since it has not yet
12 * been dynamicly linked in yet. */
13 #include "sys/syscall.h"
16 #define __set_errno(X) {(_dl_errno) = (X);}
18 /* Pull in the arch specific syscall implementation */
19 #include <dl-syscalls.h>
21 /* For MAP_ANONYMOUS -- differs between platforms */
23 #include <bits/mman.h>
25 #ifdef __ARCH_HAS_DEPRECATED_SYSCALLS__
26 /* Pull in whatever this particular arch's kernel thinks the kernel version of
27 * struct stat should look like. It turns out that each arch has a different
28 * opinion on the subject, and different kernel revs use different names... */
29 #if defined(__sparc_v9__) && (__WORDSIZE == 64)
30 #define kernel_stat64 stat
32 #define kernel_stat stat
34 #include <bits/kernel_stat.h>
35 #include <bits/kernel_types.h>
37 /* Protection bits. */
38 #define S_ISUID 04000 /* Set user ID on execution. */
39 #define S_ISGID 02000 /* Set group ID on execution. */
42 /* 1. common-generic ABI doesn't need kernel_stat translation
43 * 3. S_IS?ID already provided by stat.h
49 /* Here are the definitions for some syscalls that are used
50 by the dynamic linker. The idea is that we want to be able
51 to call these before the errno symbol is dynamicly linked, so
52 we use our own version here. Note that we cannot assume any
53 dynamic linking at all, so we cannot return any error codes.
54 We just punt if there is an error. */
55 #define __NR__dl_exit __NR_exit
56 static __always_inline _syscall1(void, _dl_exit, int, status)
58 #define __NR__dl_close __NR_close
59 static __always_inline _syscall1(int, _dl_close, int, fd)
61 #if defined __NR_openat && !defined __NR_open
62 static __always_inline int _dl_open(const char *fn,
63 int flags, __kernel_mode_t mode)
65 return INLINE_SYSCALL(openat, 4, AT_FDCWD, fn, flags, mode);
68 #elif defined __NR_open
69 # define __NR__dl_open __NR_open
70 static __always_inline _syscall3(int, _dl_open, const char *, fn, int, flags,
71 __kernel_mode_t, mode)
74 #define __NR__dl_write __NR_write
75 static __always_inline _syscall3(unsigned long, _dl_write, int, fd,
76 const void *, buf, unsigned long, count)
78 #define __NR__dl_read __NR_read
79 static __always_inline _syscall3(unsigned long, _dl_read, int, fd,
80 const void *, buf, unsigned long, count)
82 #define __NR__dl_mprotect __NR_mprotect
83 static __always_inline _syscall3(int, _dl_mprotect, const void *, addr,
84 unsigned long, len, int, prot)
86 #if defined __NR_fstatat64 && !defined __NR_stat
87 # define __NR__dl_fstatat64 __NR_fstatat64
88 static __always_inline _syscall4(int, _dl_fstatat64, int, fd, const char *,
89 fn, struct stat *, stat, int, flags)
91 static __always_inline int _dl_stat(const char *file_name,
94 return _dl_fstatat64(AT_FDCWD, file_name, buf, 0);
96 #elif defined __NR_stat
97 # define __NR__dl_stat __NR_stat
98 static __always_inline _syscall2(int, _dl_stat, const char *, file_name,
102 #if defined __NR_fstat64 && !defined __NR_fstat
103 # define __NR__dl_fstat __NR_fstat64
104 #elif defined __NR_fstat
105 # define __NR__dl_fstat __NR_fstat
107 static __always_inline _syscall2(int, _dl_fstat, int, fd, struct stat *, buf)
109 #define __NR__dl_munmap __NR_munmap
110 static __always_inline _syscall2(int, _dl_munmap, void *, start, unsigned long, length)
113 # define __NR_getuid __NR_getxuid
115 #define __NR__dl_getuid __NR_getuid
116 static __always_inline _syscall0(uid_t, _dl_getuid)
119 # define __NR_geteuid __NR_getuid
121 #define __NR__dl_geteuid __NR_geteuid
122 static __always_inline _syscall0(uid_t, _dl_geteuid)
125 # define __NR_getgid __NR_getxgid
127 #define __NR__dl_getgid __NR_getgid
128 static __always_inline _syscall0(gid_t, _dl_getgid)
131 # define __NR_getegid __NR_getgid
133 #define __NR__dl_getegid __NR_getegid
134 static __always_inline _syscall0(gid_t, _dl_getegid)
137 # define __NR_getpid __NR_getxpid
139 #define __NR__dl_getpid __NR_getpid
140 static __always_inline _syscall0(gid_t, _dl_getpid)
142 #if defined __NR_readlinkat && !defined __NR_readlink
143 # define __NR__dl_readlink __NR_readlinkat
144 static __always_inline _syscall4(int, _dl_readlink, int, id, const char *, path,
145 char *, buf, size_t, bufsiz)
146 #elif defined __NR_readlink
147 # define __NR__dl_readlink __NR_readlink
148 static __always_inline _syscall3(int, _dl_readlink, const char *, path, char *, buf,
153 #define __NR___syscall_pread __NR_pread64
154 static __always_inline _syscall5(ssize_t, __syscall_pread, int, fd, void *, buf,
155 size_t, count, off_t, offset_hi, off_t, offset_lo)
157 static __always_inline ssize_t
158 _dl_pread(int fd, void *buf, size_t count, off_t offset)
160 return __syscall_pread(fd, buf, count, offset, offset >> 31);
162 #elif defined __NR_pread
163 #define __NR___syscall_pread __NR_pread
164 static __always_inline _syscall5(ssize_t, __syscall_pread, int, fd, void *, buf,
165 size_t, count, off_t, offset_hi, off_t, offset_lo)
167 static __always_inline ssize_t
168 _dl_pread(int fd, void *buf, size_t count, off_t offset)
170 return __syscall_pread(fd, buf, count, __LONG_LONG_PAIR(offset >> 31, offset));
174 #ifdef __UCLIBC_HAS_SSP__
175 # include <sys/time.h>
176 # define __NR__dl_gettimeofday __NR_gettimeofday
177 static __always_inline _syscall2(int, _dl_gettimeofday, struct timeval *, tv,
186 /* Some architectures always use 12 as page shift for mmap2() eventhough the
187 * real PAGE_SHIFT != 12. Other architectures use the same value as
190 #ifndef MMAP2_PAGE_SHIFT
191 # define MMAP2_PAGE_SHIFT 12
194 #define MAP_FAILED ((void *) -1)
195 #define _dl_mmap_check_error(X) (((void *)X) == MAP_FAILED)
197 static __always_inline
198 void *_dl_mmap(void *addr, unsigned long size, int prot,
199 int flags, int fd, unsigned long offset)
201 #if defined(__UCLIBC_MMAP_HAS_6_ARGS__) && defined(__NR_mmap)
202 /* first try mmap(), syscall6() style */
203 return (void *)INLINE_SYSCALL(mmap, 6, addr, size, prot, flags, fd, offset);
205 #elif defined(__NR_mmap2) && !defined (__mcoldfire__)
206 /* then try mmap2() */
207 unsigned long shifted;
209 if (offset & ((1 << MMAP2_PAGE_SHIFT) - 1))
212 /* gcc needs help with putting things onto the stack */
213 shifted = offset >> MMAP2_PAGE_SHIFT;
214 return (void *)INLINE_SYSCALL(mmap2, 6, addr, size, prot, flags, fd, shifted);
216 #elif defined(__NR_mmap)
217 /* finally, fall back to mmap(), syscall1() style */
218 unsigned long buffer[6];
219 buffer[0] = (unsigned long) addr;
220 buffer[1] = (unsigned long) size;
221 buffer[2] = (unsigned long) prot;
222 buffer[3] = (unsigned long) flags;
223 buffer[4] = (unsigned long) fd;
224 buffer[5] = (unsigned long) offset;
225 return (void *)INLINE_SYSCALL(mmap, 1, buffer);
227 # error "Your architecture doesn't seem to provide mmap() !?"
231 #endif /* not for L4 */
232 #endif /* _DL_SYSCALL_H */