include/stdarg.h

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