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 #else /* _WIN64 */
  31 typedef char *va_list;
  32 #define va_start(ap,last) __builtin_va_start(ap,last)
  33 #define va_arg(ap,type) (ap += 8, sizeof(type)<=8 ? *(type*)ap : **(type**)ap)
  34 #define va_copy(dest, src) ((dest) = (src))
  35 #define va_end(ap)
  36 #endif
  37
  38 #elif __arm__
  39 typedef char *va_list;
  40 #define _tcc_alignof(type) ((int)&((struct {char c;type x;} *)0)->x)
  41 #define _tcc_align(addr,type) (((unsigned)addr + _tcc_alignof(type) - 1) \
  42                                & ~(_tcc_alignof(type) - 1))
  43 #define va_start(ap,last) ap = ((char *)&(last)) + ((sizeof(last)+3)&~3)
  44 #define va_arg(ap,type) (ap = (void *) ((_tcc_align(ap,type)+sizeof(type)+3) \
  45                         &~3), *(type *)(ap - ((sizeof(type)+3)&~3)))
  46 #define va_copy(dest, src) (dest) = (src)
  47 #define va_end(ap)
  48
  49 #else /* __i386__ */
  50 typedef char *va_list;
  51 /* only correct for i386 */
  52 #define va_start(ap,last) ap = ((char *)&(last)) + ((sizeof(last)+3)&~3)
  53 #define va_arg(ap,type) (ap += (sizeof(type)+3)&~3, *(type *)(ap - ((sizeof(type)+3)&~3)))
  54 #define va_copy(dest, src) (dest) = (src)
  55 #define va_end(ap)
  56 #endif
  57
  58 /* fix a buggy dependency on GCC in libio.h */
  59 typedef va_list __gnuc_va_list;
  60 #define _VA_LIST_DEFINED
  61
  62 #endif /* _STDARG_H */