syscalls.h 2.3 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. #define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
  8. ({ \
  9. LOAD_ARGS_##nr (args); \
  10. register int __ret __asm__("r1"); \
  11. register int _scno __asm__("r8") = name; \
  12. __asm__ __volatile__("scall" \
  13. : "=r" (__ret) \
  14. : "r"(_scno) ASM_ARGS_##nr \
  15. : __SYSCALL_CLOBBERS ); \
  16. __ret; \
  17. })
  18. /* original port had ret >= -125 ?! */
  19. #define LOAD_ARGS_0() do { } while(0)
  20. #define ASM_ARGS_0
  21. #define LOAD_ARGS_1(a1) \
  22. int _a1 = (int)(a1); \
  23. LOAD_ARGS_0(); \
  24. register int __a1 __asm__("r1") = _a1
  25. #define ASM_ARGS_1 ASM_ARGS_0, "0"(__a1)
  26. #define LOAD_ARGS_2(a1, a2) \
  27. int _a2 = (int)(a2); \
  28. LOAD_ARGS_1(a1); \
  29. register int __a2 __asm__("r2") = _a2
  30. #define ASM_ARGS_2 ASM_ARGS_1, "r"(__a2)
  31. #define LOAD_ARGS_3(a1, a2, a3) \
  32. int _a3 = (int)(a3); \
  33. LOAD_ARGS_2(a1, a2); \
  34. register int __a3 __asm__("r3") = _a3
  35. #define ASM_ARGS_3 ASM_ARGS_2, "r"(__a3)
  36. #define LOAD_ARGS_4(a1, a2, a3, a4) \
  37. int _a4 = (int)(a4); \
  38. LOAD_ARGS_3(a1, a2, a3); \
  39. register int __a4 __asm__("r4") = _a4
  40. #define ASM_ARGS_4 ASM_ARGS_3, "r"(__a4)
  41. #define LOAD_ARGS_5(a1, a2, a3, a4, a5) \
  42. int _a5 = (int)(a5); \
  43. LOAD_ARGS_4(a1, a2, a3, a4); \
  44. register int __a5 __asm__("r5") = _a5
  45. #define ASM_ARGS_5 ASM_ARGS_4, "r"(__a5)
  46. #define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6) \
  47. int _a6 = (int)(a6); \
  48. LOAD_ARGS_5(a1, a2, a3, a4, a5); \
  49. register int __a6 __asm__("r6") = _a6
  50. #define ASM_ARGS_6 ASM_ARGS_5, "r"(__a6)
  51. #define __SYSCALL_CLOBBERS
  52. #endif /* __ASSEMBLER__ */
  53. #endif /* _BITS_SYSCALLS_H */