1 /* Pull in compiler and arch stuff */
3 /* Pull in the arch specific type information */
5 /* Pull in the arch specific syscall implementation */
6 #include "ld_syscalls.h"
7 /* For MAP_ANONYMOUS -- differs between platforms */
9 /* Pull in whatever this particular arch's kernel thinks the kernel version of
10 * struct stat should look like. It turns out that each arch has a different
11 * opinion on the subject, and different kernel revs use different names... */
16 /* Encoding of the file mode. */
17 #define S_IFMT 0170000 /* These bits determine file type. */
20 #define S_IFDIR 0040000 /* Directory. */
21 #define S_IFCHR 0020000 /* Character device. */
22 #define S_IFBLK 0060000 /* Block device. */
23 #define S_IFREG 0100000 /* Regular file. */
24 #define S_IFIFO 0010000 /* FIFO. */
25 #define S_IFLNK 0120000 /* Symbolic link. */
26 #define S_IFSOCK 0140000 /* Socket. */
28 /* Protection bits. */
30 #define S_ISUID 04000 /* Set user ID on execution. */
31 #define S_ISGID 02000 /* Set group ID on execution. */
32 #define S_ISVTX 01000 /* Save swapped text after use (sticky). */
33 #define S_IREAD 0400 /* Read by owner. */
34 #define S_IWRITE 0200 /* Write by owner. */
35 #define S_IEXEC 0100 /* Execute by owner. */
38 /* Here are the definitions for some syscalls that are used
39 by the dynamic linker. The idea is that we want to be able
40 to call these before the errno symbol is dynamicly linked, so
41 we use our own version here. Note that we cannot assume any
42 dynamic linking at all, so we cannot return any error codes.
43 We just punt if there is an error. */
46 #define __NR__dl_exit __NR_exit
47 static inline _syscall1(void, _dl_exit, int, status);
50 #define __NR__dl_close __NR_close
51 static inline _syscall1(int, _dl_close, int, fd);
54 #if defined(__powerpc) || defined(__mips__) || defined(__sh__)
55 /* PowerPC, MIPS and SuperH have a different calling convention for mmap(). */
56 #define __NR__dl_mmap __NR_mmap
57 static inline _syscall6(void *, _dl_mmap, void *, start, size_t, length,
58 int, prot, int, flags, int, fd, off_t, offset);
60 #define __NR__dl_mmap_real __NR_mmap
61 static inline _syscall1(void *, _dl_mmap_real, unsigned long *, buffer);
63 static inline void * _dl_mmap(void * addr, unsigned long size, int prot,
64 int flags, int fd, unsigned long offset)
66 unsigned long buffer[6];
68 buffer[0] = (unsigned long) addr;
69 buffer[1] = (unsigned long) size;
70 buffer[2] = (unsigned long) prot;
71 buffer[3] = (unsigned long) flags;
72 buffer[4] = (unsigned long) fd;
73 buffer[5] = (unsigned long) offset;
74 return (void *) _dl_mmap_real(buffer);
79 #define _dl_MAX_ERRNO 4096
81 #define _dl_mmap_check_error(__res) \
82 (((int)__res) < 0 && ((int)__res) >= -_dl_MAX_ERRNO)
85 #define MAP_ANONYMOUS 0x20
87 #error MAP_ANONYMOUS not defined and suplementary value not known
92 #define __NR__dl_open __NR_open
93 #define O_RDONLY 0x0000
96 #define O_CREAT 0100 /* not fcntl */
97 static inline _syscall2(int, _dl_open, const char *, fn, int, flags);
99 #define __NR__dl_write __NR_write
100 static inline _syscall3(unsigned long, _dl_write, int, fd,
101 const void *, buf, unsigned long, count);
104 #define __NR__dl_read __NR_read
105 static inline _syscall3(unsigned long, _dl_read, int, fd,
106 const void *, buf, unsigned long, count);
108 #define __NR__dl_mprotect __NR_mprotect
109 static inline _syscall3(int, _dl_mprotect, const void *, addr, unsigned long, len, int, prot);
113 #define __NR__dl_stat __NR_stat
114 static inline _syscall2(int, _dl_stat, const char *, file_name, struct stat *, buf);
117 #define __NR__dl_munmap __NR_munmap
118 static inline _syscall2(int, _dl_munmap, void *, start, unsigned long, length);
120 #define __NR__dl_getuid __NR_getuid
121 static inline _syscall0(uid_t, _dl_getuid);
123 #define __NR__dl_geteuid __NR_geteuid
124 static inline _syscall0(uid_t, _dl_geteuid);
126 #define __NR__dl_getgid __NR_getgid
127 static inline _syscall0(gid_t, _dl_getgid);
129 #define __NR__dl_getegid __NR_getegid
130 static inline _syscall0(gid_t, _dl_getegid);
132 #define __NR__dl_getpid __NR_getpid
133 static inline _syscall0(gid_t, _dl_getpid);
136 * Not an actual syscall, but we need something in assembly to say whether
139 static inline int _dl_suid_ok(void)
141 uid_t uid, euid, gid, egid;
144 euid = _dl_geteuid();
146 egid = _dl_getegid();
148 if(uid == euid && gid == egid)
154 #define __NR__dl_readlink __NR_readlink
155 static inline _syscall3(int, _dl_readlink, const char *, path, char *, buf, size_t, bufsiz);