dl-syscall.h 4.3 KB

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  1. #ifndef _LD_SYSCALL_H_
  2. #define _LD_SYSCALL_H_
  3. /* Pull in the arch specific syscall implementation */
  4. #include <ld_syscalls.h>
  5. /* For MAP_ANONYMOUS -- differs between platforms */
  6. #include <asm/mman.h>
  7. /* Pull in whatever this particular arch's kernel thinks the kernel version of
  8. * struct stat should look like. It turns out that each arch has a different
  9. * opinion on the subject, and different kernel revs use different names... */
  10. #define kernel_stat stat
  11. #include <bits/kernel_stat.h>
  12. /* Encoding of the file mode. */
  13. #define S_IFMT 0170000 /* These bits determine file type. */
  14. /* File types. */
  15. #define S_IFDIR 0040000 /* Directory. */
  16. #define S_IFCHR 0020000 /* Character device. */
  17. #define S_IFBLK 0060000 /* Block device. */
  18. #define S_IFREG 0100000 /* Regular file. */
  19. #define S_IFIFO 0010000 /* FIFO. */
  20. #define S_IFLNK 0120000 /* Symbolic link. */
  21. #define S_IFSOCK 0140000 /* Socket. */
  22. /* Protection bits. */
  23. #define S_ISUID 04000 /* Set user ID on execution. */
  24. #define S_ISGID 02000 /* Set group ID on execution. */
  25. #define S_ISVTX 01000 /* Save swapped text after use (sticky). */
  26. #define S_IREAD 0400 /* Read by owner. */
  27. #define S_IWRITE 0200 /* Write by owner. */
  28. #define S_IEXEC 0100 /* Execute by owner. */
  29. /* Here are the definitions for some syscalls that are used
  30. by the dynamic linker. The idea is that we want to be able
  31. to call these before the errno symbol is dynamicly linked, so
  32. we use our own version here. Note that we cannot assume any
  33. dynamic linking at all, so we cannot return any error codes.
  34. We just punt if there is an error. */
  35. #define __NR__dl_exit __NR_exit
  36. static inline _syscall1(void, _dl_exit, int, status);
  37. #define __NR__dl_close __NR_close
  38. static inline _syscall1(int, _dl_close, int, fd);
  39. #if defined(__powerpc__) || defined(__mips__) || defined(__sh__)
  40. /* PowerPC, MIPS and SuperH have a different calling convention for mmap(). */
  41. #define __NR__dl_mmap __NR_mmap
  42. static inline _syscall6(void *, _dl_mmap, void *, start, size_t, length,
  43. int, prot, int, flags, int, fd, off_t, offset);
  44. #else
  45. #define __NR__dl_mmap_real __NR_mmap
  46. static inline _syscall1(void *, _dl_mmap_real, unsigned long *, buffer);
  47. static inline void * _dl_mmap(void * addr, unsigned long size, int prot,
  48. int flags, int fd, unsigned long offset)
  49. {
  50. unsigned long buffer[6];
  51. buffer[0] = (unsigned long) addr;
  52. buffer[1] = (unsigned long) size;
  53. buffer[2] = (unsigned long) prot;
  54. buffer[3] = (unsigned long) flags;
  55. buffer[4] = (unsigned long) fd;
  56. buffer[5] = (unsigned long) offset;
  57. return (void *) _dl_mmap_real(buffer);
  58. }
  59. #endif
  60. #ifndef _dl_MAX_ERRNO
  61. #define _dl_MAX_ERRNO 4096
  62. #endif
  63. #define _dl_mmap_check_error(__res) \
  64. (((int)__res) < 0 && ((int)__res) >= -_dl_MAX_ERRNO)
  65. #ifndef MAP_ANONYMOUS
  66. #ifdef __sparc__
  67. #define MAP_ANONYMOUS 0x20
  68. #else
  69. #error MAP_ANONYMOUS not defined and suplementary value not known
  70. #endif
  71. #endif
  72. #define __NR__dl_open __NR_open
  73. #define O_RDONLY 0x0000
  74. #define O_WRONLY 01
  75. #define O_RDWR 02
  76. #define O_CREAT 0100 /* not fcntl */
  77. static inline _syscall2(int, _dl_open, const char *, fn, int, flags);
  78. #define __NR__dl_write __NR_write
  79. static inline _syscall3(unsigned long, _dl_write, int, fd,
  80. const void *, buf, unsigned long, count);
  81. #define __NR__dl_read __NR_read
  82. static inline _syscall3(unsigned long, _dl_read, int, fd,
  83. const void *, buf, unsigned long, count);
  84. #define __NR__dl_mprotect __NR_mprotect
  85. static inline _syscall3(int, _dl_mprotect, const void *, addr, unsigned long, len, int, prot);
  86. #define __NR__dl_stat __NR_stat
  87. static inline _syscall2(int, _dl_stat, const char *, file_name, struct stat *, buf);
  88. #define __NR__dl_munmap __NR_munmap
  89. static inline _syscall2(int, _dl_munmap, void *, start, unsigned long, length);
  90. #define __NR__dl_getuid __NR_getuid
  91. static inline _syscall0(uid_t, _dl_getuid);
  92. #define __NR__dl_geteuid __NR_geteuid
  93. static inline _syscall0(uid_t, _dl_geteuid);
  94. #define __NR__dl_getgid __NR_getgid
  95. static inline _syscall0(gid_t, _dl_getgid);
  96. #define __NR__dl_getegid __NR_getegid
  97. static inline _syscall0(gid_t, _dl_getegid);
  98. #define __NR__dl_getpid __NR_getpid
  99. static inline _syscall0(gid_t, _dl_getpid);
  100. #define __NR__dl_readlink __NR_readlink
  101. static inline _syscall3(int, _dl_readlink, const char *, path, char *, buf, size_t, bufsiz);
  102. #endif /* _LD_SYSCALL_H_ */