59 lines
1.7 KiB
C
59 lines
1.7 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
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* GNU Mes --- Maxwell Equations of Software
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* Copyright © 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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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____%rbp,%rax");
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asm ("add____$i8,%rax !8");
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asm ("mov____(%rax),%rax");
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asm ("add____$i8,%rax !0x03");
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asm ("shl____$i8,%rax !0x03");
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asm ("add____%rbp,%rax");
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// 40017a: 48 a3 88 77 66 55 44 movabs %rax,0x1122334455667788
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// 48 89 05 bd 0e 20 00 mov %rax,0x200ebd(%rip) # 601000 <_GLOBAL_OFFSET_TABLE_>
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// FIXME: 64-bit addresses...DUNNO!
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// asm ("mov____%rax,0x32 &environ");
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asm ("mov____%rbp,%rax");
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asm ("add____$i8,%rax !16");
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asm ("mov____%rax,%rsi");
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asm ("mov____%rbp,%rax");
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asm ("add____$i8,%rax !8");
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asm ("mov____(%rax),%rax");
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asm ("mov____%rax,%rdi");
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main ();
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// FIXME
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//asm ("call32 &main !00 !00 !00 !00");
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asm ("mov____%rax,%rdi");
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asm ("mov____$i32,%rax %0x3c");
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asm ("syscall");
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asm ("hlt");
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}
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