syscalls.h 1.6 KB

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  1. #ifndef _BITS_SYSCALLS_H
  2. #define _BITS_SYSCALLS_H
  3. #ifndef _SYSCALL_H
  4. # error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead."
  5. #endif
  6. #ifndef __ASSEMBLER__
  7. #include <errno.h>
  8. #define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
  9. ({ \
  10. register int _a1 __asm__("r12"); \
  11. register int _scno __asm__("r8") = name; \
  12. LOAD_ARGS_##nr (args); \
  13. __asm__ __volatile__("scall /* syscall " #name " */" \
  14. : "=r" (_a1) \
  15. : "r"(_scno) ASM_ARGS_##nr \
  16. : "cc", "memory"); \
  17. _a1; \
  18. })
  19. #define INTERNAL_SYSCALL_ERROR_P(val, err) \
  20. ((unsigned int)(val) >= 0xfffff001U)
  21. #define LOAD_ARGS_0() do { } while(0)
  22. #define ASM_ARGS_0
  23. #define LOAD_ARGS_1(a1) \
  24. _a1 = (int) (a1); \
  25. LOAD_ARGS_0()
  26. #define ASM_ARGS_1 ASM_ARGS_0, "r"(_a1)
  27. #define LOAD_ARGS_2(a1, a2) \
  28. register int _a2 __asm__("r11") = (int)(a2); \
  29. LOAD_ARGS_1(a1)
  30. #define ASM_ARGS_2 ASM_ARGS_1, "r"(_a2)
  31. #define LOAD_ARGS_3(a1, a2, a3) \
  32. register int _a3 __asm__("r10") = (int)(a3); \
  33. LOAD_ARGS_2(a1, a2)
  34. #define ASM_ARGS_3 ASM_ARGS_2, "r"(_a3)
  35. #define LOAD_ARGS_4(a1, a2, a3, a4) \
  36. register int _a4 __asm__("r9") = (int)(a4); \
  37. LOAD_ARGS_3(a1, a2, a3)
  38. #define ASM_ARGS_4 ASM_ARGS_3, "r"(_a4)
  39. #define LOAD_ARGS_5(a1, a2, a3, a4, a5) \
  40. register int _a5 __asm__("r5") = (int)(a5); \
  41. LOAD_ARGS_4(a1, a2, a3, a4)
  42. #define ASM_ARGS_5 ASM_ARGS_4, "r"(_a5)
  43. #define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6) \
  44. register int _a6 __asm__("r3") = (int)(a6); \
  45. LOAD_ARGS_5(a1, a2, a3, a4, a5)
  46. #define ASM_ARGS_6 ASM_ARGS_5, "r"(_a6)
  47. #endif /* __ASSEMBLER__ */
  48. #endif /* _BITS_SYSCALLS_H */