757d603e4c
* include/libmes-mini.h (g_stdin, g_stdout, g_stderr): Rename to __stdin, __stdout, __stderr. Update users.
77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
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* GNU Mes --- Maxwell Equations of Software
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* Copyright © 2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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*
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* This file is part of GNU Mes.
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*
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* GNU Mes is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* GNU Mes is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libmes-mini.h>
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//int main (int argc, char *argv[], char *envp[]);
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void
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_start ()
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{
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asm (
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"mov $0,%%eax\n\t"
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"mov %%eax,%0\n"
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: "=r" (__stdin)
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: //no inputs ""
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);
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asm (
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"mov $1,%%eax\n\t"
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"mov %%eax,%0\n"
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: "=r" (__stdout)
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: //no inputs ""
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);
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asm (
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"mov $2,%%eax\n\t"
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"mov %%eax,%0\n"
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: "=r" (__stderr)
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: //no inputs ""
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);
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asm (
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"mov %%ebp,%%eax\n\t"
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"add $4,%%eax\n\t"
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"movzbl (%%eax),%%eax\n\t"
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"add $3,%%eax\n\t"
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"shl $2,%%eax\n\t"
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"add %%ebp,%%eax\n\t"
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"mov %%eax,%0\n\t"
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"push %%eax\n\t"
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: "=r" (environ)
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: //no inputs ""
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);
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asm (
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"mov %ebp,%eax\n\t"
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"add $8,%eax\n\t"
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"push %eax\n\t"
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"mov %ebp,%eax\n\t"
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"add $4,%eax\n\t"
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"movzbl (%eax),%eax\n\t"
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"push %eax\n\t"
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"call main\n\t"
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"mov %eax,%ebx\n\t"
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"mov $1,%eax\n\t"
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"int $0x80\n\t"
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"hlt \n\t"
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);
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}
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