596df500b6
Bootstrappable TCC needs some extra definitions that upstream TCC obtains from `tccdefs.h` in its codebase, which is also injected in the binary using a weird trick (see `c2str` in tcc's codebase). * include/stdarg.h: Add definitions for variable length arguments.
93 lines
3.5 KiB
C
93 lines
3.5 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
|
|
* GNU Mes --- Maxwell Equations of Software
|
|
* Copyright © 2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
|
|
* Copyright © 2021 W. J. van der Laan <laanwj@protonmail.com>
|
|
*
|
|
* This file is part of GNU Mes.
|
|
*
|
|
* GNU Mes is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 3 of the License, or (at
|
|
* your option) any later version.
|
|
*
|
|
* GNU Mes is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#ifndef __MES_STDARG_H
|
|
#define __MES_STDARG_H 1
|
|
|
|
#if SYSTEM_LIBC
|
|
#undef __MES_STDARG_H
|
|
#include_next <stdarg.h>
|
|
|
|
#define va_arg8(ap, type) va_arg (ap, type)
|
|
|
|
#elif (__GNUC__ || __TINYC__) && __riscv
|
|
|
|
// GCC on RISC-V always passes arguments in registers. Implementing
|
|
// these macros without the use of built-ins would be very involved.
|
|
// TINYCC tries to be GCC compatible in this case.
|
|
|
|
#if __TINYC__ < 928
|
|
// Bootstrappable TINYCC (version < 928) needs some definitions in RISC-V
|
|
typedef char *__builtin_va_list;
|
|
#define __va_reg_size (__riscv_xlen >> 3)
|
|
#define _tcc_align(addr, type) \
|
|
(((unsigned long)addr + __alignof__(type) - 1) \
|
|
& -(__alignof__(type)))
|
|
#define __builtin_va_arg(ap, type) \
|
|
(*(sizeof (type) > (2*__va_reg_size) \
|
|
? *(type **)((ap += __va_reg_size) - __va_reg_size) \
|
|
: (ap = (va_list)(_tcc_align (ap, type) \
|
|
+ (sizeof (type) + __va_reg_size - 1) \
|
|
& -__va_reg_size), \
|
|
(type *)(ap - ((sizeof (type)+ __va_reg_size - 1) \
|
|
& -__va_reg_size)))))
|
|
|
|
#define __builtin_va_end(ap) (void)(ap)
|
|
#if !defined (__builtin_va_copy)
|
|
#define __builtin_va_copy(dest, src) (dest) = (src)
|
|
#endif
|
|
#endif // __TINYC__ < 928
|
|
|
|
typedef __builtin_va_list va_list;
|
|
|
|
#define va_start(v, l) __builtin_va_start (v, l)
|
|
#define va_end(v) __builtin_va_end (v)
|
|
#define va_arg(v, l) __builtin_va_arg (v, l)
|
|
#define va_arg8(ap, type) va_arg (ap, type)
|
|
#define va_copy(d, s) __builtin_va_copy (d, s)
|
|
|
|
#else // ! SYSTEM_LIBC && ! __riscv
|
|
|
|
#include <sys/types.h>
|
|
|
|
#if __GNUC__ && __x86_64__
|
|
#define __FOO_VARARGS 1
|
|
#endif
|
|
|
|
typedef char *va_list;
|
|
#define va_start(ap, last) (void)((ap) = (char*)(&(last) + 1))
|
|
#define va_arg(ap, type) (type)(((long*)((ap) = ((ap) + sizeof (void*))))[-1])
|
|
#define va_align(ap, alignment) ((char*)((((unsigned long) (ap)) + (alignment) - 1) &~ ((alignment) - 1)))
|
|
#define va_arg8(ap, type) (type)(((double*)((ap) = (va_align((ap), 8) + sizeof(double))))[-1])
|
|
#define va_end(ap) (void)((ap) = 0)
|
|
#define va_copy(dest, src) dest = src
|
|
|
|
int vexec (char const *file_name, va_list ap);
|
|
int vfprintf (FILE * stream, char const *template, va_list ap);
|
|
int vfscanf (FILE * stream, char const *template, va_list ap);
|
|
int vprintf (char const *format, va_list ap);
|
|
int vsprintf (char *str, char const *format, va_list ap);
|
|
int vsnprintf (char *str, size_t size, char const *format, va_list ap);
|
|
int vsscanf (char const *s, char const *template, va_list ap);
|
|
|
|
#endif // ! SYSTEM_LIBC
|
|
|
|
#endif // __MES_STDARG_H
|