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  1. #ifndef _STDARG_H_
  2. #define _STDARG_H_
  3.  
  4. #include <stddef.h>
  5.  
  6. #ifdef __x86_64__
  7. #ifndef _WIN64
  8.  
  9. //This should be in sync with the declaration on our lib/libtcc1.c
  10. /* GCC compatible definition of va_list. */
  11. typedef struct {
  12.     unsigned int gp_offset;
  13.     unsigned int fp_offset;
  14.     union {
  15.         unsigned int overflow_offset;
  16.         char *overflow_arg_area;
  17.     };
  18.     char *reg_save_area;
  19. } __va_list_struct;
  20.  
  21. typedef __va_list_struct va_list[1];
  22.  
  23. extern void  _FUNC(__va_start)(__va_list_struct *ap, void *fp);
  24. extern void* _FUNC(__va_arg)(__va_list_struct *ap, int arg_type, int size, int align);
  25.  
  26. #define va_start(ap, last) __va_start(ap, __builtin_frame_address(0))
  27. #define va_arg(ap, type)                                                \
  28.     (*(type *)(__va_arg(ap, __builtin_va_arg_types(type), sizeof(type), __alignof__(type))))
  29. #define va_copy(dest, src) (*(dest) = *(src))
  30. #define va_end(ap)
  31.  
  32. #else /* _WIN64 */
  33. typedef char *va_list;
  34. #define va_start(ap,last) __builtin_va_start(ap,last)
  35. #define va_arg(ap,type) (ap += 8, sizeof(type)<=8 ? *(type*)ap : **(type**)ap)
  36. #define va_copy(dest, src) ((dest) = (src))
  37. #define va_end(ap)
  38. #endif
  39.  
  40. #elif __arm__
  41. typedef char *va_list;
  42. #define _tcc_alignof(type) ((int)&((struct {char c;type x;} *)0)->x)
  43. #define _tcc_align(addr,type) (((unsigned)addr + _tcc_alignof(type) - 1) \
  44.                                & ~(_tcc_alignof(type) - 1))
  45. #define va_start(ap,last) ap = ((char *)&(last)) + ((sizeof(last)+3)&~3)
  46. #define va_arg(ap,type) (ap = (void *) ((_tcc_align(ap,type)+sizeof(type)+3) \
  47.                         &~3), *(type *)(ap - ((sizeof(type)+3)&~3)))
  48. #define va_copy(dest, src) (dest) = (src)
  49. #define va_end(ap)
  50.  
  51. #elif defined(__aarch64__)
  52. typedef struct {
  53.     void *__stack;
  54.     void *__gr_top;
  55.     void *__vr_top;
  56.     int   __gr_offs;
  57.     int   __vr_offs;
  58. } va_list;
  59. #define va_start(ap, last) __va_start(ap, last)
  60. #define va_arg(ap, type) __va_arg(ap, type)
  61. #define va_end(ap)
  62. #define va_copy(dest, src) ((dest) = (src))
  63.  
  64. #else /* __i386__ */
  65. typedef char *va_list;
  66. /* only correct for i386 */
  67. #define va_start(ap,last) ap = ((char *)&(last)) + ((sizeof(last)+3)&~3)
  68. #define va_arg(ap,type) (ap += (sizeof(type)+3)&~3, *(type *)(ap - ((sizeof(type)+3)&~3)))
  69. #define va_copy(dest, src) (dest) = (src)
  70. #define va_end(ap)
  71. #endif
  72.  
  73. /* fix a buggy dependency on GCC in libio.h */
  74. typedef va_list __gnuc_va_list;
  75. #define _VA_LIST_DEFINED
  76.  
  77. #endif /* _STDARG_H */
  78.