diff options
Diffstat (limited to 'stdarg.h')
| -rw-r--r-- | stdarg.h | 73 |
1 files changed, 72 insertions, 1 deletions
@@ -1,6 +1,75 @@ #ifndef _STDARG_H #define _STDARG_H +#ifdef __x86_64__ + +#ifdef __TINYC__ + +#include <stdlib.h> + +/* GCC compatible definition of va_list. */ +struct __va_list_struct { + unsigned int gp_offset; + unsigned int fp_offset; + union { + unsigned int overflow_offset; + char *overflow_arg_area; + }; + char *reg_save_area; +}; + +typedef struct __va_list_struct *va_list; + +/* avoid #define malloc tcc_malloc. + XXX: add __malloc or something into libtcc? */ +inline void *__va_list_malloc(size_t size) { return malloc(size); } +inline void __va_list_free(void *ptr) { free(ptr); } + +/* XXX: this lacks the support of aggregated types. */ +#define va_start(ap, last) \ + (ap = (va_list)__va_list_malloc(sizeof(struct __va_list_struct)), \ + *ap = *(struct __va_list_struct*)( \ + (char*)__builtin_frame_address(0) - 16), \ + ap->overflow_arg_area = ((char *)__builtin_frame_address(0) + \ + ap->overflow_offset), \ + ap->reg_save_area = (char *)__builtin_frame_address(0) - 176 - 16 \ + ) +#define va_arg(ap, type) \ + (*(type*)(__builtin_types_compatible_p(type, long double) \ + ? (ap->overflow_arg_area += 16, \ + ap->overflow_arg_area - 16) \ + : __builtin_types_compatible_p(type, double) \ + ? (ap->fp_offset < 128 + 48 \ + ? (ap->fp_offset += 16, \ + ap->reg_save_area + ap->fp_offset - 16) \ + : (ap->overflow_arg_area += 8, \ + ap->overflow_arg_area - 8)) \ + : (ap->gp_offset < 48 \ + ? (ap->gp_offset += 8, \ + ap->reg_save_area + ap->gp_offset - 8) \ + : (ap->overflow_arg_area += 8, \ + ap->overflow_arg_area - 8)) \ + )) +#define va_copy(dest, src) \ + ((dest) = (va_list)malloc(sizeof(struct __va_list_struct)), \ + *(dest) = *(src)) +#define va_end(ap) __va_list_free(ap) + +#else + +/* for GNU C */ + +typedef __builtin_va_list va_list; + +#define va_start(ap, last) __builtin_va_start(ap, last) +#define va_arg(ap, type) __builtin_va_arg(ap, type) +#define va_copy(dest, src) __builtin_va_copy(dest, src) +#define va_end(ap) __builtin_va_end(ap) + +#endif + +#else + typedef char *va_list; /* only correct for i386 */ @@ -9,8 +78,10 @@ typedef char *va_list; #define va_copy(dest, src) (dest) = (src) #define va_end(ap) +#endif + /* fix a buggy dependency on GCC in libio.h */ typedef va_list __gnuc_va_list; #define _VA_LIST_DEFINED -#endif +#endif /* _STDARG_H */ |