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generated by cgit-pink 1.4.1-2-gfad0 (git 2.36.2.497.gbbea4dcf42) at 2024-11-11 09:00:06 +0000


 


@akkartik.com>  2018-07-27 16:53:47 -0700

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## first program: same as https://www.muppetlabs.com/~breadbox/software/tiny/teensy.html
# Just return 42.
#
# To run:
#   $ subx translate ex1.2.subx ex1
#   $ subx run ex1
# Expected result:
#   $ echo $?
#   42

== 0x08048054  # code segment, after leaving room for ELF header
# instruction                     effective address                                                   operand     displacement    immediate
# op          subop               mod             rm32          base        index         scale       r32
# 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
  bb/copy                                                                                                                         2a/imm32          # copy 42 to EBX
  # exit(EBX)
  b8/copy                                                                                                                         1/imm32           # copy 1 to EAX
  cd/syscall                                                                                                                      0x80/imm8         # int 80h

# vim:ft=subx