9273a64098
* lib/linux/x86-mes-gcc/crt0.c: Split from lib/linux/crt0.c. * lib/linux/x86-mes-gcc/crt1.c: Split from lib/linux/crt1.c. * lib/linux/x86-mes-gcc/crti.c: Split from lib/linux/crti.c. * lib/linux/x86-mes-gcc/crtn.c: Split from lib/linux/crtn.c. * lib/linux/x86-mes/crt0.c: Split from lib/linux/crt0.c. * lib/linux/x86-mes/crt1.c: Split from lib/linux/crt1.c. * lib/linux/x86-mes/crti.c: Split from lib/linux/crti.c. * lib/linux/x86-mes/crtn.c: Split from lib/linux/crtn.c. * build-aux/build-cc.sh: Update. * build-aux/build-cc32.sh: Update. * build-aux/build-mes.sh: Update.
58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
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* GNU Mes --- Maxwell Equations of Software
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* Copyright © 2017,2018 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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// no clue what crt0.o is and why gcc-2.6.3 needs it
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// instead of calling main, it seems to call either _main or ___main,
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// let's try _main first
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char **environ = 0;
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int _main (int argc, char *argv[]);
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int
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_start ()
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{
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asm ("mov____%ebp,%eax");
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asm ("add____$i8,%eax !4");
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asm ("movzbl_(%eax),%eax");
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asm ("add____$i8,%eax !3");
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asm ("shl____$i8,%eax !0x02");
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asm ("add____%ebp,%eax");
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asm ("mov____%eax,0x32 &environ");
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asm ("mov____%ebp,%eax");
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asm ("add____$i8,%eax !8");
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asm ("push___%eax");
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asm ("mov____%ebp,%eax");
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asm ("add____$i8,%eax !4");
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asm ("movzbl_(%eax),%eax");
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asm ("push___%eax");
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_main ();
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asm ("mov____%eax,%ebx");
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asm ("mov____$i32,%eax %1");
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asm ("int____$0x80");
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asm ("hlt");
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}
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