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USAGE.md

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This file describes how to manually set up a directory for use with the permuter. You probably don't need to do this! In normal circumstances, ./import.py does all this for you. See README.md for more details.

  • create a directory that will contain all of the input files for the invokation
  • put a compile command into <dir>/compile.sh (see e.g. compile_example.sh; it will be invoked as ./compile.sh input.c -o output.o)
  • gcc -E -P -I header_dir -D'__attribute__(x)=' orig_c_file.c > <dir>/base.c
  • python3 strip_other_fns.py <dir>/base.c func_name
  • put asm for func_name into <dir>/target.s, with the following header:
.set noat
.set noreorder
.set gp=64
.macro glabel label
    .global \label
	.type \label, @function
    \label:
.endm
  • arm-none-eabi-as -mthumb -mthumb-interwork -mcpu=arm7tdmi <dir>/target.s -o <dir>/target.o
  • optional sanity checks:
    • <dir>/compile.sh <dir>/base.c -o <dir>/base.o
    • ./diff.sh <dir>/target.o <dir>/base.o
  • ./permuter.py <dir>