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 /* Avoid conflicting definition for va_list on musl libc */
  20 #ifndef __DEFINED_va_list
  21 typedef __va_list_struct va_list[1];
  22 #define __DEFINED_va_list
  23 #endif
  24
  25 void __va_start(__va_list_struct *ap, void *fp);
  26 void *__va_arg(__va_list_struct *ap, int arg_type, int size, int align);
  27
  28 #define va_start(ap, last) __va_start(ap, __builtin_frame_address(0))
  29 #define va_arg(ap, type)                                                \
  30     (*(type *)(__va_arg(ap, __builtin_va_arg_types(type), sizeof(type), __alignof__(type))))
  31 #define va_copy(dest, src) (*(dest) = *(src))
  32 #define va_end(ap)
  33
  34 /* avoid conflicting definition for va_list on Macs. */
  35 #define _VA_LIST_T
  36
  37 #else /* _WIN64 */
  38 typedef char *va_list;
  39 #define va_start(ap,last) __builtin_va_start(ap,last)
  40 #define va_arg(ap, t) ((sizeof(t) > 8 || (sizeof(t) & (sizeof(t) - 1))) \
  41         ? **(t **)((ap += 8) - 8) : *(t  *)((ap += 8) - 8))
  42 #define va_copy(dest, src) ((dest) = (src))
  43 #define va_end(ap)
  44 #endif
  45
  46 #elif __arm__
  47 typedef char *va_list;
  48 #define _tcc_alignof(type) ((int)&((struct {char c;type x;} *)0)->x)
  49 #define _tcc_align(addr,type) (((unsigned)addr + _tcc_alignof(type) - 1) \
  50                                & ~(_tcc_alignof(type) - 1))
  51 #define va_start(ap,last) ap = ((char *)&(last)) + ((sizeof(last)+3)&~3)
  52 #define va_arg(ap,type) (ap = (void *) ((_tcc_align(ap,type)+sizeof(type)+3) \
  53                         &~3), *(type *)(ap - ((sizeof(type)+3)&~3)))
  54 #define va_copy(dest, src) (dest) = (src)
  55 #define va_end(ap)
  56
  57 #elif defined(__aarch64__)
  58 typedef struct {
  59     void *__stack;
  60     void *__gr_top;
  61     void *__vr_top;
  62     int   __gr_offs;
  63     int   __vr_offs;
  64 } va_list;
  65 #define va_start(ap, last) __va_start(ap, last)
  66 #define va_arg(ap, type) __va_arg(ap, type)
  67 #define va_end(ap)
  68 #define va_copy(dest, src) ((dest) = (src))
  69
  70 #else /* __i386__ */
  71 typedef char *va_list;
  72 /* only correct for i386 */
  73 #define va_start(ap,last) ap = ((char *)&(last)) + ((sizeof(last)+3)&~3)
  74 #define va_arg(ap,type) (ap += (sizeof(type)+3)&~3, *(type *)(ap - ((sizeof(type)+3)&~3)))
  75 #define va_copy(dest, src) (dest) = (src)
  76 #define va_end(ap)
  77 #endif
  78
  79 /* fix a buggy dependency on GCC in libio.h */
  80 typedef va_list __gnuc_va_list;
  81 #define _VA_LIST_DEFINED
  82
  83 #endif /* _STDARG_H */