From 1d943da0cf9154e7ce78ce867cdbb91531c5d78e Mon Sep 17 00:00:00 2001 From: Matthew Sotoudeh Date: Tue, 25 Jul 2023 14:58:33 -0700 Subject: initial dietc commit --- scripts/stdincludes/stdarg.h | 46 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 scripts/stdincludes/stdarg.h (limited to 'scripts/stdincludes/stdarg.h') diff --git a/scripts/stdincludes/stdarg.h b/scripts/stdincludes/stdarg.h new file mode 100644 index 0000000..73563b4 --- /dev/null +++ b/scripts/stdincludes/stdarg.h @@ -0,0 +1,46 @@ +#ifndef _STDARG_H +#define _STDARG_H + +typedef struct { + unsigned int gp_offset; unsigned int fp_offset; + void *overflow_arg_area; void *reg_save_area; +} __va_elem; +typedef __va_elem va_list; +typedef va_list __builtin_va_list; +typedef va_list __gnuc_va_list; + +extern void __builtin_va_start(void *ap, void *last); +#define va_start(ap, last) do { void *_ap = ≈ __builtin_va_start(_ap, last); } while (0) +#define va_end(ap) +static void *__va_arg_mem(__va_elem *ap, int sz, int align) { + unsigned long p = ap->overflow_arg_area; + if (align > 8) + p = (p + 15) / 16 * 16; + ap->overflow_arg_area = ((unsigned long)p + sz + 7) / 8 * 8; + return (void*)p; +} +static void *__va_arg_gp(__va_elem *ap, int sz, int align) { + if (ap->gp_offset >= 48) + return __va_arg_mem(ap, sz, align); + + void *r = ap->reg_save_area + ap->gp_offset; + ap->gp_offset += 8; + return r; +} +static void *__va_arg_fp(__va_elem *ap, int sz, int align) { + if (ap->fp_offset >= 112) + return __va_arg_mem(ap, sz, align); + + void *r = ap->reg_save_area + ap->fp_offset; + ap->fp_offset += 8; + return r; +} +#define va_arg(ap, ty) \ + ({ \ + int klass = __builtin_reg_class(ty); \ + *(ty *)(klass == 0 ? __va_arg_gp(&ap, sizeof(ty), _Alignof(ty)) : \ + klass == 1 ? __va_arg_fp(&ap, sizeof(ty), _Alignof(ty)) : \ + __va_arg_mem(&ap, sizeof(ty), _Alignof(ty))); \ + }) + +#endif -- cgit v1.2.3