.cia -> .elf

mkelf.sh

#!/bin/bash

set -e

FN="$(basename "$1" .cia)_tmp"
rm -rf "$FN"
mkdir "$FN"
ctrtool --contents="$FN/contents" "$1" >/dev/null
ctrtool --exefsdir="$FN/exefs" --decompresscode "$FN/contents.0000.00000000" >/dev/null
ASD="$(ctrtool "$FN/contents.0000.00000000" | grep Code)"

TEXT_ADDR=$(echo $ASD | sed 's/.*Code text address: \(0x[0-9A-F]*\).*/\1/')
CORO_ADDR=$(echo $ASD | sed 's/.*Code ro address: \(0x[0-9A-F]*\).*/\1/')
CORW_ADDR=$(echo $ASD | sed 's/.*Code data address: \(0x[0-9A-F]*\).*/\1/')

TEXT_FSIZ=$(echo $ASD | sed 's/.*Code text size: \(0x[0-9A-F]*\).*/\1/')
CORO_FSIZ=$(echo $ASD | sed 's/.*Code ro size: \(0x[0-9A-F]*\).*/\1/')
CORW_FSIZ=$(echo $ASD | sed 's/.*Code data size: \(0x[0-9A-F]*\).*/\1/')

TEXT_SKIP=$(echo $ASD | sed 's/.*Code text max pages: 0x[0-9A-F]* (\(0x[0-9A-F]*\)).*/\1/')
CORO_SKIP=$(echo $ASD | sed 's/.*Code ro max pages: 0x[0-9A-F]* (\(0x[0-9A-F]*\)).*/\1/')
CORW_SKIP=$(echo $ASD | sed 's/.*Code data max pages: 0x[0-9A-F]* (\(0x[0-9A-F]*\)).*/\1/')

CBSS_SIZE=$(echo $ASD | sed 's/.*Code bss size: \(0x[0-9A-F]*\).*/\1/')
CSTK_SIZE=$(echo $ASD | sed 's/.*Code stack size: \(0x[0-9A-F]*\).*/\1/')


dd if="$FN/exefs/code.bin" bs=1 count=$((TEXT_FSIZ)) 2>/dev/null | pv >"$FN/text.bin"
dd if="$FN/exefs/code.bin" bs=1 count=$((CORO_FSIZ)) skip=$((TEXT_SKIP)) 2>/dev/null | pv >"$FN/ro.bin"
dd if="$FN/exefs/code.bin" bs=1 count=$((CORW_FSIZ)) skip=$((TEXT_SKIP + CORO_SKIP)) 2>/dev/null | pv >"$FN/rw.bin"

arm-none-eabi-objcopy -I binary -O elf32-littlearm --rename-section .data=.text "$FN/text.bin" "$FN/text.o"
arm-none-eabi-objcopy -I binary -O elf32-littlearm --rename-section .data=.rodata "$FN/ro.bin" "$FN/ro.o"
arm-none-eabi-objcopy -I binary -O elf32-littlearm --rename-section .data=.data "$FN/rw.bin" "$FN/rw.o"

cat >"$FN/e2elf.ld" <<EOF
OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
OUTPUT_ARCH(arm)

MEMORY
{
EOF

echo "    textregion : ORIGIN = $TEXT_ADDR, LENGTH = $TEXT_SKIP" >>"$FN/e2elf.ld"
echo "    roregion : ORIGIN = $CORO_ADDR, LENGTH = $CORO_SKIP" >>"$FN/e2elf.ld"
echo "    rwregion : ORIGIN = $CORW_ADDR, LENGTH = $((CORW_SKIP + CBSS_SIZE))" >>"$FN/e2elf.ld"

cat >>"$FN/e2elf.ld" <<EOF
}

PHDRS
{
    text PT_LOAD FLAGS(5);
    rodata PT_LOAD FLAGS(4);
    data PT_LOAD FLAGS(6);
    bss PT_LOAD;
}

SECTIONS
{
    .init : ALIGN(4)
    {
        __text_start = .;
        KEEP (*(.init))
    } >textregion :text

    .text : ALIGN (4)
    {

        *(.text*)
        *(.stub)
        *(.gnu.warning)
        *(.gnu.linkonce.t*)
        *(.glue_7)
        *(.glue_7t)
    } >textregion

    __text_end = .;

    .rodata :
    {
        *(.rodata)
        *all.rodata*(*)
        *(.roda)
        *(.rodata.*)
        *(.gnu.linkonce.r*)
        SORT(CONSTRUCTORS)
    } >roregion :rodata

    .data :
    {
        *(.data)
        *(.data.*)
        *(.gnu.linkonce.d*)
    } >rwregion :data

    .bss :
    {
EOF

echo "        . = . + $CBSS_SIZE;" >>"$FN/e2elf.ld"

cat >>"$FN/e2elf.ld" <<EOF
    } >rwregion :bss

    __bss_end = .;
    __bss_end__ = .;

    _end = .;
    __end__ = .;
    PROVIDE (end = _end);
    
EOF

echo "    .stack $CSTK_SIZE : { _stack = .; *(.stack) }" >>"$FN/e2elf.ld"
echo "}" >>"$FN/e2elf.ld"

arm-none-eabi-ld --accept-unknown-input-arch -T "$FN/e2elf.ld" -o "$(basename $1 .cia).elf" "$FN/text.o" "$FN/ro.o" "$FN/rw.o"