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>
23 /* Pull in whatever this particular arch's kernel thinks the kernel version of
24 * struct stat should look like. It turns out that each arch has a different
25 * opinion on the subject, and different kernel revs use different names... */
26 #if defined(__sparc_v9__) && (__WORDSIZE == 64)
27 #define kernel_stat64 stat
29 #define kernel_stat stat
31 #include <bits/kernel_stat.h>
32 #include <bits/kernel_types.h>
34 /* Protection bits. */
35 #define S_ISUID 04000 /* Set user ID on execution. */
36 #define S_ISGID 02000 /* Set group ID on execution. */
39 /* Here are the definitions for some syscalls that are used
40 by the dynamic linker. The idea is that we want to be able
41 to call these before the errno symbol is dynamicly linked, so
42 we use our own version here. Note that we cannot assume any
43 dynamic linking at all, so we cannot return any error codes.
44 We just punt if there is an error. */
45 #define __NR__dl_exit __NR_exit
46 static __always_inline _syscall1(void, _dl_exit, int, status)
48 #define __NR__dl_close __NR_close
49 static __always_inline _syscall1(int, _dl_close, int, fd)
51 #define __NR__dl_open __NR_open
52 static __always_inline _syscall3(int, _dl_open, const char *, fn, int, flags,
53 __kernel_mode_t, mode)
55 #define __NR__dl_write __NR_write
56 static __always_inline _syscall3(unsigned long, _dl_write, int, fd,
57 const void *, buf, unsigned long, count)
59 #define __NR__dl_read __NR_read
60 static __always_inline _syscall3(unsigned long, _dl_read, int, fd,
61 const void *, buf, unsigned long, count)
63 #define __NR__dl_mprotect __NR_mprotect
64 static __always_inline _syscall3(int, _dl_mprotect, const void *, addr,
65 unsigned long, len, int, prot)
67 #define __NR__dl_stat __NR_stat
68 static __always_inline _syscall2(int, _dl_stat, const char *, file_name,
71 #define __NR__dl_fstat __NR_fstat
72 static __always_inline _syscall2(int, _dl_fstat, int, fd, struct stat *, buf)
74 #define __NR__dl_munmap __NR_munmap
75 static __always_inline _syscall2(int, _dl_munmap, void *, start, unsigned long, length)
78 # define __NR_getuid __NR_getxuid
80 #define __NR__dl_getuid __NR_getuid
81 static __always_inline _syscall0(uid_t, _dl_getuid)
84 # define __NR_geteuid __NR_getuid
86 #define __NR__dl_geteuid __NR_geteuid
87 static __always_inline _syscall0(uid_t, _dl_geteuid)
90 # define __NR_getgid __NR_getxgid
92 #define __NR__dl_getgid __NR_getgid
93 static __always_inline _syscall0(gid_t, _dl_getgid)
96 # define __NR_getegid __NR_getgid
98 #define __NR__dl_getegid __NR_getegid
99 static __always_inline _syscall0(gid_t, _dl_getegid)
102 # define __NR_getpid __NR_getxpid
104 #define __NR__dl_getpid __NR_getpid
105 static __always_inline _syscall0(gid_t, _dl_getpid)
107 #define __NR__dl_readlink __NR_readlink
108 static __always_inline _syscall3(int, _dl_readlink, const char *, path, char *, buf,
112 #define __NR___syscall_pread __NR_pread64
113 static __always_inline _syscall5(ssize_t, __syscall_pread, int, fd, void *, buf,
114 size_t, count, off_t, offset_hi, off_t, offset_lo)
116 static __always_inline ssize_t
117 _dl_pread(int fd, void *buf, size_t count, off_t offset)
119 return __syscall_pread(fd, buf, count, offset, offset >> 31);
121 #elif defined __NR_pread
122 #define __NR___syscall_pread __NR_pread
123 static __always_inline _syscall5(ssize_t, __syscall_pread, int, fd, void *, buf,
124 size_t, count, off_t, offset_hi, off_t, offset_lo)
126 static __always_inline ssize_t
127 _dl_pread(int fd, void *buf, size_t count, off_t offset)
129 return __syscall_pread(fd, buf, count, __LONG_LONG_PAIR(offset >> 31, offset));
133 #ifdef __UCLIBC_HAS_SSP__
134 # include <sys/time.h>
135 # define __NR__dl_gettimeofday __NR_gettimeofday
136 static __always_inline _syscall2(int, _dl_gettimeofday, struct timeval *, tv,
145 /* Some architectures always use 12 as page shift for mmap2() eventhough the
146 * real PAGE_SHIFT != 12. Other architectures use the same value as
149 #ifndef MMAP2_PAGE_SHIFT
150 # define MMAP2_PAGE_SHIFT 12
153 #define MAP_FAILED ((void *) -1)
154 #define _dl_mmap_check_error(X) (((void *)X) == MAP_FAILED)
156 static __always_inline
157 void *_dl_mmap(void *addr, unsigned long size, int prot,
158 int flags, int fd, unsigned long offset)
160 #if defined(__UCLIBC_MMAP_HAS_6_ARGS__) && defined(__NR_mmap)
161 /* first try mmap(), syscall6() style */
162 return (void *)INLINE_SYSCALL(mmap, 6, addr, size, prot, flags, fd, offset);
164 #elif defined(__NR_mmap2) && !defined (__mcoldfire__)
165 /* then try mmap2() */
166 unsigned long shifted;
168 if (offset & ((1 << MMAP2_PAGE_SHIFT) - 1))
171 /* gcc needs help with putting things onto the stack */
172 shifted = offset >> MMAP2_PAGE_SHIFT;
173 return (void *)INLINE_SYSCALL(mmap2, 6, addr, size, prot, flags, fd, shifted);
175 #elif defined(__NR_mmap)
176 /* finally, fall back to mmap(), syscall1() style */
177 unsigned long buffer[6];
178 buffer[0] = (unsigned long) addr;
179 buffer[1] = (unsigned long) size;
180 buffer[2] = (unsigned long) prot;
181 buffer[3] = (unsigned long) flags;
182 buffer[4] = (unsigned long) fd;
183 buffer[5] = (unsigned long) offset;
184 return (void *)INLINE_SYSCALL(mmap, 1, buffer);
186 # error "Your architecture doesn't seem to provide mmap() !?"
190 #endif /* _LD_SYSCALL_H_ */