1803762e3f
When compiling on macOS (at least in version 10.12) the TCC compiler failed to compile libtcc1.a. Three problems were solved: - The predefined macro "__APPLE__" is now available, as it is tested in the libc darwin header files - the libtcc1 Makefile defined _ANSI_SOURCE, although it used signals - stdargs.h defined va_list differently from the darwin libc. If the darwin standard library was included BEFORE stdargs this caused problems. - the darwin libc generated a warning if GCC < 4 was used - additional defines are predefined now to make darwin libc headers compile.
70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
/* va_list.c - tinycc support for va_list on X86_64 */
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#if defined __x86_64__
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#include "stdarg.h"
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/* Avoid include files, they may not be available when cross compiling */
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extern void *memset(void *s, int c, __SIZE_TYPE__ n);
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extern void abort(void);
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/* This should be in sync with our include/stdarg.h */
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#define __VA_GEN_REG 0
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#define __VA_FLOAT_REG 1
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#define __VA_STACK 2
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/* GCC compatible definition of va_list. */
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typedef struct {
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unsigned int gp_offset;
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unsigned int fp_offset;
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union {
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unsigned int overflow_offset;
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char *overflow_arg_area;
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};
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char *reg_save_area;
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} __va_list_struct;
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void __va_start(va_list ap, void *fp)
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{
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__va_list_struct * _ap = (__va_list_struct*) ap;
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memset(_ap, 0, sizeof(__va_list_struct));
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*_ap = *(__va_list_struct *)((char *)fp - 16);
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_ap->overflow_arg_area = (char *)fp + _ap->overflow_offset;
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_ap->reg_save_area = (char *)fp - 176 - 16;
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}
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void *__va_arg(va_list ap,
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int arg_type,
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int size, int align)
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{
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__va_list_struct * _ap = (__va_list_struct*) ap;
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size = (size + 7) & ~7;
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align = (align + 7) & ~7;
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switch (arg_type) {
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case __VA_GEN_REG:
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if (_ap->gp_offset + size <= 48) {
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_ap->gp_offset += size;
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return _ap->reg_save_area + _ap->gp_offset - size;
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}
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goto use_overflow_area;
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case __VA_FLOAT_REG:
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if (_ap->fp_offset < 128 + 48) {
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_ap->fp_offset += 16;
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return _ap->reg_save_area + _ap->fp_offset - 16;
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}
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size = 8;
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goto use_overflow_area;
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case __VA_STACK:
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use_overflow_area:
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_ap->overflow_arg_area += size;
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_ap->overflow_arg_area = (char*)((long long)(_ap->overflow_arg_area + align - 1) & -align);
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return _ap->overflow_arg_area - size;
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default: /* should never h_appen */
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abort();
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return 0;
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}
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}
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#endif
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