21 lines
1.1 KiB
Plaintext
21 lines
1.1 KiB
Plaintext
## first program: same as https://www.muppetlabs.com/~breadbox/software/tiny/teensy.html
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# Just return 42.
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#
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# To run:
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# $ subx translate ex1.2.subx ex1
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# $ subx run ex1
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# Expected result:
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# $ echo $?
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# 42
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== 0x08048054 # code segment, after leaving room for ELF header
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# instruction effective address operand displacement immediate
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# op subop mod rm32 base index scale r32
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# 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes
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bb/copy 2a/imm32 # copy 42 to EBX
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# exit(EBX)
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b8/copy 1/imm32 # copy 1 to EAX
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cd/syscall 0x80/imm8 # int 80h
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# vim:ft=subx
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