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| author | Kartik Agaram <vc@akkartik.com> | 2018-07-06 23:34:10 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2018-07-06 23:34:10 -0700 |
| commit | a62f334c60bc19c581de27bd7b2a865647bcb00f (patch) | |
| tree | 99bece4ae713110b56350b710cc4d6dd1a83ac2e /subx/ex2.subx | |
| parent | 517a471bc0945657dc331c16d4bed74c7dc5b3b5 (diff) | |
| download | mu-a62f334c60bc19c581de27bd7b2a865647bcb00f.tar.gz | |
4317 - example program: simple addition
Diffstat (limited to 'subx/ex2.subx')
| -rw-r--r-- | subx/ex2.subx | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/subx/ex2.subx b/subx/ex2.subx new file mode 100644 index 00000000..39f784e9 --- /dev/null +++ b/subx/ex2.subx @@ -0,0 +1,13 @@ +## add 1 and 1 + +# opcode ModR/M SIB displacement immediate +# instruction mod, reg, Reg/Mem bits scale, index, base +# 1-3 bytes 0/1 byte 0/1 byte 0/1/2/4 bytes 0/1/2/4 bytes + bb 2a 00 00 00 # copy 0x2a (42) to EBX + bb 42/imm32 # copy 42 to EBX + 81 c3 1/imm32 # add 1 to EBX + # exit + 05 01 00 00 00 # copy 1 to EAX + cd 80 # int 80h + +# vim:ft=subx |