#!/usr/bin/env python3

import struct, sys

import hackyelf

if len(sys.argv) == 1:
    printf("Usage: %s <input.elf> > <output.cfg>" % sys.argv[0], file=sys.stderr)
    sys.exit(1)

elfblob = None
with open(sys.argv[1], 'rb') as f:
    elfblob = f.read()

elf = hackyelf.parse(elfblob)

print("""

# TODO: reset halt maybe?
halt

""")

endian = '<' if elf.ident[5] == 1 else '>'
for phdr in elf.phdrs:
    lenbytes = min(phdr.filesz, phdr.memsz)
    zerobytes = phdr.memsz - lenbytes

    baseaddr = phdr.paddr if phdr.paddr else phdr.vaddr
    # text/data
    lenm4 = lenbytes - (lenbytes & 3)
    data = struct.unpack('%c%dI' % (endian, lenm4>>2), elfblob[phdr.off:(phdr.off+lenm4)])
    for i in range(0, lenbytes, 4):
        print("mww 0x%08x 0x%08x" % ((baseaddr + i), data[i>>2]))
    if lenm4 != lenbytes:
        for i in range(lenm4, lenbytes):
            print("mwb 0x%08x 0x%02x" % ((baseaddr + i), elfblob[phdr.off + i]))

    # bss
    if zerobytes:
        print("mwb 0x%08x 0x00 0x%08x" % ((baseaddr + lenbytes), zerobytes))


print("""

# set pc to entrypoint
reg pc 0x%08x

""" % elf.entry)