70 lines
2 KiB
Plaintext
70 lines
2 KiB
Plaintext
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### GNU Mes --- Maxwell Equations of Software
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### Copyright © 2017,2019 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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### Commentary:
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# elf32-body-hello-mes.hex2: `Hello, GNU Mes!' for i686-linux written in
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# hex2 assembly, for usage with generic elf32-header.hex2 and
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# elf32-footer-single-main.hex.
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# This ELF binary contains a symbol table which means that objdump and
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# gdb can be used to inspect and debug.
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### Code:
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# DEFINE SYS_exit 1
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# DEFINE SYS_write 4
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# DEFINE stdout 1
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# @200
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:ELF_text
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:_start
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e8 %main # call +11 <main>
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00 00 00
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00 00 00 00
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00 00 00 00
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# @210
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:main
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# print <hello>
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b8 04 00 00 00 # mov $SYS_write,%eax
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68 %bye>hello # push $(bye-hello)
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68 &hello # push $hello
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68 01 00 00 00 # push $stdout
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68 00 00 00 00 # push ??
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cd 80 # int $0x80
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# exit 0
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b8 01 00 00 00 # mov $SYS_exit,%eax
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68 00 00 00 00 # push 0
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68 00 00 00 00 # push ??
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cd 80 # int $0x80
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f4 # hlt
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00 00 00 00 00 00 00 00 00 00 # align to @240
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00 00 00
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# @240
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:ELF_data
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:hello
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48 65 6c 6c 6f 2c 20 47 # Hello, G
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4e 55 20 4d 65 73 21 0a # NU Mes!\n
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:bye
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00
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