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| author | Irene Knapp <ireneista@irenes.space> | 2026-10-05 01:58:58 -0700 |
|---|---|---|
| committer | Irene Knapp <ireneista@irenes.space> | 2026-10-05 01:58:58 -0700 |
| commit | e889b122cee2eb60cd1577c22560c8918b30d749 (patch) | |
| tree | 1c45bc3869657e4f1b5b6f551bd815b07db86897 /historical/exit-code.gnu.asm | |
| parent | 7acba568178af4048135a858a7ca9c6fb9c00520 (diff) | |
move around a bunch of the files that aren't actually in use
to better describe their status Force-Push: yes Change-Id: If5ef70b7872700ff36ef07f20aac1f3b991dff45
Diffstat (limited to 'historical/exit-code.gnu.asm')
| -rw-r--r-- | historical/exit-code.gnu.asm | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/historical/exit-code.gnu.asm b/historical/exit-code.gnu.asm new file mode 100644 index 0000000..48b7e62 --- /dev/null +++ b/historical/exit-code.gnu.asm @@ -0,0 +1,29 @@ +/* + * This file was a very early example, written by consulting [1]. It was + * useful primarily to see how the GNU assembler handles these opcodes, to + * better understand the encoding. + * + * [1] https://www.muppetlabs.com/~breadbox/software/tiny/teensy.html + * + * + * gcc -o exit-code -nostartfiles -nostdlib exit-code.gnu.asm && ./exit-code ; echo $? + * + * or + * + * as -o exit-code.o exit-code.gnu.asm && ld -s -o exit-code exit-code.o && ./exit-code; echo $? + * + * Can't use nasm, nasm is 32-bit only. + * + * Since you get a nice clean file, you can then do: + * + * objdump --disassemble exit-code + */ +.text + +.global _start + +_start: + mov $60, %eax + mov $42, %edi + syscall + |