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>
20 /* For MAP_ANONYMOUS -- differs between platforms */
22 #include <bits/mman.h>
24 #ifdef __ARCH_HAS_DEPRECATED_SYSCALLS__
25 /* Pull in whatever this particular arch's kernel thinks the kernel version of
26 * struct stat should look like. It turns out that each arch has a different
27 * opinion on the subject, and different kernel revs use different names... */
28 #if defined(__sparc_v9__) && (__WORDSIZE == 64)
29 #define kernel_stat64 stat
31 #define kernel_stat stat
33 #include <bits/kernel_stat.h>
34 #include <bits/kernel_types.h>
36 /* Protection bits. */
37 #define S_ISUID 04000 /* Set user ID on execution. */
38 #define S_ISGID 02000 /* Set group ID on execution. */
41 /* 1. common-generic ABI doesn't need kernel_stat translation
42 * 3. S_IS?ID already provided by stat.h
48 /* Here are the definitions for some syscalls that are used
49 by the dynamic linker. The idea is that we want to be able
50 to call these before the errno symbol is dynamicly linked, so
51 we use our own version here. Note that we cannot assume any
52 dynamic linking at all, so we cannot return any error codes.
53 We just punt if there is an error. */
54 #define __NR__dl_exit __NR_exit
55 static __always_inline _syscall1(void, _dl_exit, int, status)
57 #define __NR__dl_close __NR_close
58 static __always_inline _syscall1(int, _dl_close, int, fd)
60 #if defined __NR_openat && !defined __NR_open
61 static __always_inline int _dl_open(const char *fn,
62 int flags, __kernel_mode_t mode)
64 return INLINE_SYSCALL(openat, 4, AT_FDCWD, fn, flags, mode);
67 #elif defined __NR_open
68 # define __NR__dl_open __NR_open
69 static __always_inline _syscall3(int, _dl_open, const char *, fn, int, flags,
70 __kernel_mode_t, mode)
73 #define __NR__dl_write __NR_write
74 static __always_inline _syscall3(unsigned long, _dl_write, int, fd,
75 const void *, buf, unsigned long, count)
77 #define __NR__dl_read __NR_read
78 static __always_inline _syscall3(unsigned long, _dl_read, int, fd,
79 const void *, buf, unsigned long, count)
81 #define __NR__dl_mprotect __NR_mprotect
82 static __always_inline _syscall3(int, _dl_mprotect, const void *, addr,
83 unsigned long, len, int, prot)
85 #if defined __NR_fstatat64 && !defined __NR_stat
86 # define __NR__dl_fstatat64 __NR_fstatat64
87 static __always_inline _syscall4(int, _dl_fstatat64, int, fd, const char *,
88 fn, struct stat *, stat, int, flags)
90 static __always_inline int _dl_stat(const char *file_name,
93 return _dl_fstatat64(AT_FDCWD, file_name, buf, 0);
95 #elif defined __NR_stat
96 # define __NR__dl_stat __NR_stat
97 static __always_inline _syscall2(int, _dl_stat, const char *, file_name,
101 #if defined __NR_fstat64 && !defined __NR_fstat
102 # define __NR__dl_fstat __NR_fstat64
103 #elif defined __NR_fstat
104 # define __NR__dl_fstat __NR_fstat
106 static __always_inline _syscall2(int, _dl_fstat, int, fd, struct stat *, buf)
108 #define __NR__dl_munmap __NR_munmap
109 static __always_inline _syscall2(int, _dl_munmap, void *, start, unsigned long, length)
112 # define __NR_getuid __NR_getxuid
114 #define __NR__dl_getuid __NR_getuid
115 static __always_inline _syscall0(uid_t, _dl_getuid)
118 # define __NR_geteuid __NR_getuid
120 #define __NR__dl_geteuid __NR_geteuid
121 static __always_inline _syscall0(uid_t, _dl_geteuid)
124 # define __NR_getgid __NR_getxgid
126 #define __NR__dl_getgid __NR_getgid
127 static __always_inline _syscall0(gid_t, _dl_getgid)
130 # define __NR_getegid __NR_getgid
132 #define __NR__dl_getegid __NR_getegid
133 static __always_inline _syscall0(gid_t, _dl_getegid)
136 # define __NR_getpid __NR_getxpid
138 #define __NR__dl_getpid __NR_getpid
139 static __always_inline _syscall0(gid_t, _dl_getpid)
141 #if defined __NR_readlinkat && !defined __NR_readlink
142 # define __NR__dl_readlink __NR_readlinkat
143 static __always_inline _syscall4(int, _dl_readlink, int, id, const char *, path,
144 char *, buf, size_t, bufsiz)
145 #elif defined __NR_readlink
146 # define __NR__dl_readlink __NR_readlink
147 static __always_inline _syscall3(int, _dl_readlink, const char *, path, char *, buf,
152 #define __NR___syscall_pread __NR_pread64
153 static __always_inline _syscall5(ssize_t, __syscall_pread, int, fd, void *, buf,
154 size_t, count, off_t, offset_hi, off_t, offset_lo)
156 static __always_inline ssize_t
157 _dl_pread(int fd, void *buf, size_t count, off_t offset)
159 return __syscall_pread(fd, buf, count, offset, offset >> 31);
161 #elif defined __NR_pread
162 #define __NR___syscall_pread __NR_pread
163 static __always_inline _syscall5(ssize_t, __syscall_pread, int, fd, void *, buf,
164 size_t, count, off_t, offset_hi, off_t, offset_lo)
166 static __always_inline ssize_t
167 _dl_pread(int fd, void *buf, size_t count, off_t offset)
169 return __syscall_pread(fd, buf, count, __LONG_LONG_PAIR(offset >> 31, offset));
173 #ifdef __UCLIBC_HAS_SSP__
174 # include <sys/time.h>
175 # define __NR__dl_gettimeofday __NR_gettimeofday
176 static __always_inline _syscall2(int, _dl_gettimeofday, struct timeval *, tv,
185 /* Some architectures always use 12 as page shift for mmap2() eventhough the
186 * real PAGE_SHIFT != 12. Other architectures use the same value as
189 #ifndef MMAP2_PAGE_SHIFT
190 # define MMAP2_PAGE_SHIFT 12
193 #define MAP_FAILED ((void *) -1)
194 #define _dl_mmap_check_error(X) (((void *)X) == MAP_FAILED)
196 static __always_inline
197 void *_dl_mmap(void *addr, unsigned long size, int prot,
198 int flags, int fd, unsigned long offset)
200 #if defined(__UCLIBC_MMAP_HAS_6_ARGS__) && defined(__NR_mmap)
201 /* first try mmap(), syscall6() style */
202 return (void *)INLINE_SYSCALL(mmap, 6, addr, size, prot, flags, fd, offset);
204 #elif defined(__NR_mmap2) && !defined (__mcoldfire__)
205 /* then try mmap2() */
206 unsigned long shifted;
208 if (offset & ((1 << MMAP2_PAGE_SHIFT) - 1))
211 /* gcc needs help with putting things onto the stack */
212 shifted = offset >> MMAP2_PAGE_SHIFT;
213 return (void *)INLINE_SYSCALL(mmap2, 6, addr, size, prot, flags, fd, shifted);
215 #elif defined(__NR_mmap)
216 /* finally, fall back to mmap(), syscall1() style */
217 unsigned long buffer[6];
218 buffer[0] = (unsigned long) addr;
219 buffer[1] = (unsigned long) size;
220 buffer[2] = (unsigned long) prot;
221 buffer[3] = (unsigned long) flags;
222 buffer[4] = (unsigned long) fd;
223 buffer[5] = (unsigned long) offset;
224 return (void *)INLINE_SYSCALL(mmap, 1, buffer);
226 # error "Your architecture doesn't seem to provide mmap() !?"
230 #endif /* _DL_SYSCALL_H */