4 /* Pull in the arch specific syscall implementation */
5 #include <dl-syscalls.h>
6 /* For MAP_ANONYMOUS -- differs between platforms */
8 /* Pull in whatever this particular arch's kernel thinks the kernel version of
9 * struct stat should look like. It turns out that each arch has a different
10 * opinion on the subject, and different kernel revs use different names... */
11 #define kernel_stat stat
12 #include <bits/kernel_stat.h>
13 #include <bits/kernel_types.h>
15 #include <bits/sysnum.h>
18 /* _dl_open() parameters */
19 #define O_RDONLY 0x0000
24 /* Encoding of the file mode. */
25 #define S_IFMT 0170000 /* These bits determine file type. */
28 #define S_IFDIR 0040000 /* Directory. */
29 #define S_IFCHR 0020000 /* Character device. */
30 #define S_IFBLK 0060000 /* Block device. */
31 #define S_IFREG 0100000 /* Regular file. */
32 #define S_IFIFO 0010000 /* FIFO. */
33 #define S_IFLNK 0120000 /* Symbolic link. */
34 #define S_IFSOCK 0140000 /* Socket. */
36 /* Protection bits. */
37 #define S_ISUID 04000 /* Set user ID on execution. */
38 #define S_ISGID 02000 /* Set group ID on execution. */
39 #define S_ISVTX 01000 /* Save swapped text after use (sticky). */
40 #define S_IREAD 0400 /* Read by owner. */
41 #define S_IWRITE 0200 /* Write by owner. */
42 #define S_IEXEC 0100 /* Execute by owner. */
44 /* Stuff for _dl_mmap */
46 #define MAP_FAILED ((void *) -1)
47 #define _dl_mmap_check_error(X) (((void *)X) == MAP_FAILED)
50 #define _dl_MAX_ERRNO 4096
52 #define _dl_mmap_check_error(__res) \
53 (((long)__res) < 0 && ((long)__res) >= -_dl_MAX_ERRNO)
58 /* Here are the definitions for some syscalls that are used
59 by the dynamic linker. The idea is that we want to be able
60 to call these before the errno symbol is dynamicly linked, so
61 we use our own version here. Note that we cannot assume any
62 dynamic linking at all, so we cannot return any error codes.
63 We just punt if there is an error. */
64 #define __NR__dl_exit __NR_exit
65 static inline _syscall1(void, _dl_exit, int, status);
67 #define __NR__dl_close __NR_close
68 static inline _syscall1(int, _dl_close, int, fd);
70 #define __NR__dl_open __NR_open
71 static inline _syscall3(int, _dl_open, const char *, fn, int, flags, __kernel_mode_t, mode);
73 #define __NR__dl_write __NR_write
74 static inline _syscall3(unsigned long, _dl_write, int, fd,
75 const void *, buf, unsigned long, count);
77 #define __NR__dl_read __NR_read
78 static inline _syscall3(unsigned long, _dl_read, int, fd,
79 const void *, buf, unsigned long, count);
81 #define __NR__dl_mprotect __NR_mprotect
82 static inline _syscall3(int, _dl_mprotect, const void *, addr, unsigned long, len, int, prot);
84 #define __NR__dl_stat __NR_stat
85 static inline _syscall2(int, _dl_stat, const char *, file_name, struct stat *, buf);
87 #define __NR__dl_fstat __NR_fstat
88 static inline _syscall2(int, _dl_fstat, int, fd, struct stat *, buf);
90 #define __NR__dl_munmap __NR_munmap
91 static inline _syscall2(int, _dl_munmap, void *, start, unsigned long, length);
93 #define __NR__dl_getuid __NR_getuid
94 static inline _syscall0(uid_t, _dl_getuid);
96 #define __NR__dl_geteuid __NR_geteuid
97 static inline _syscall0(uid_t, _dl_geteuid);
99 #define __NR__dl_getgid __NR_getgid
100 static inline _syscall0(gid_t, _dl_getgid);
102 #define __NR__dl_getegid __NR_getegid
103 static inline _syscall0(gid_t, _dl_getegid);
105 #define __NR__dl_getpid __NR_getpid
106 static inline _syscall0(gid_t, _dl_getpid);
108 #define __NR__dl_readlink __NR_readlink
109 static inline _syscall3(int, _dl_readlink, const char *, path, char *, buf, size_t, bufsiz);
112 #ifdef MMAP_HAS_6_ARGS
113 #define __NR__dl_mmap __NR_mmap
114 static inline _syscall6(void *, _dl_mmap, void *, start, size_t, length,
115 int, prot, int, flags, int, fd, off_t, offset);
117 #define __NR__dl_mmap_real __NR_mmap
118 static inline _syscall1(void *, _dl_mmap_real, unsigned long *, buffer);
120 static inline void * _dl_mmap(void * addr, unsigned long size, int prot,
121 int flags, int fd, unsigned long offset)
123 unsigned long buffer[6];
125 buffer[0] = (unsigned long) addr;
126 buffer[1] = (unsigned long) size;
127 buffer[2] = (unsigned long) prot;
128 buffer[3] = (unsigned long) flags;
129 buffer[4] = (unsigned long) fd;
130 buffer[5] = (unsigned long) offset;
131 return (void *) _dl_mmap_real(buffer);
134 #elif defined __NR_mmap2
135 #define __NR___syscall_mmap2 __NR_mmap2
136 static inline _syscall6(__ptr_t, __syscall_mmap2, __ptr_t, addr,
137 size_t, len, int, prot, int, flags, int, fd, off_t, offset);
138 /*always 12, even on architectures where PAGE_SHIFT != 12 */
139 #define MMAP2_PAGE_SHIFT 12
140 static inline void * _dl_mmap(void * addr, unsigned long size, int prot,
141 int flags, int fd, unsigned long offset)
143 if (offset & ((1 << MMAP2_PAGE_SHIFT) - 1))
145 return(__syscall_mmap2(addr, size, prot, flags,
146 fd, (off_t) (offset >> MMAP2_PAGE_SHIFT)));
149 #error "Your architecture doesn't seem to provide mmap() !?"
152 #endif /* _LD_SYSCALL_H_ */