mes/lib/libc+tcc-mes.c

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/* -*-comment-start: "//";comment-end:""-*-
* Mes --- Maxwell Equations of Software
* Copyright © 2017 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
*
* This file is part of Mes.
*
* 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.
*
* 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 Mes. If not, see <http://www.gnu.org/licenses/>.
*/
#include <setjmp.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <signal.h>
#include <sys/mman.h>
#include <sys/time.h>
#include <unistd.h>
#include <libc-mes.c>
#include <linux+tcc-mes.c>
#include <libc+tcc.c>
#include <getopt.c>
int errno;
void
longjmp (jmp_buf env, int val)
{
val = val == 0 ? 1 : val;
asm ("mov____0x8(%ebp),%eax !0x0c"); // val
asm ("mov____0x8(%ebp),%ebp !0x08"); // env*
asm ("mov____0x8(%ebp),%ebx !0x4"); // env.__pc
asm ("mov____0x8(%ebp),%esp !0x8"); // env.__sp
asm ("mov____0x8(%ebp),%ebp !0x0"); // env.__bp
asm ("jmp____*%ebx");
// not reached
exit (42);
}
#if 0
int
setjmp_debug (jmp_buf env, int val)
{
int i;
#if 1
i = env->__bp;
i = env->__pc;
i = env->__sp;
#else
i = env[0].__bp;
i = env[0].__pc;
i = env[0].__sp;
#endif
return val == 0 ? 1 : val;
}
#endif
int
setjmp (__jmp_buf *env)
{
int *p = (int*)&env;
env[0].__bp = p[-2];
env[0].__pc = p[-1];
env[0].__sp = (int)&env;
return 0;
}