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https://github.com/adron-s/mtik_initrd_hacks.git
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first commit
This commit is contained in:
Sergey Sergeev
commit
1423b9e5c7
13 changed files with 103 additions and 0 deletions
5
.gitignore
vendored
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5
.gitignore
vendored
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.*
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!.gitignore
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kernel.headers
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bins/*
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kernel-new.elf
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1
README.md
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1
README.md
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# mtik_initrd_hacks
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BIN
cpio-fs/bin/busybox
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BIN
cpio-fs/bin/busybox
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7
cpio-fs/etc/rc.d/rc.S
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cpio-fs/etc/rc.d/rc.S
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#!/bin/sh
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/bin/busybox --install /bin
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mount -v proc /proc -n -t proc
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sh
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cpio-fs/init
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cpio-fs/init
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BIN
cpio-fs/oldinit
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BIN
cpio-fs/oldinit
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BIN
cpio-fs/order
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BIN
cpio-fs/order
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20
dump_elf.sh
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dump_elf.sh
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#!/bin/sh
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OPENWRT_DIR=/home/prog/openwrt/lede-all/2019-openwrt-all/openwrt-ipq806x
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export STAGING_DIR=$OPENWRT_DIR/staging_dir/toolchain-arm_cortex-a15+neon-vfpv4_gcc-7.4.0_musl_eabi
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#OPENWRT_DIR=/home/prog/openwrt/lede-all/2019-openwrt-all/openwrt-ipq4xxx
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#export STAGING_DIR=${OPENWRT_DIR}/staging_dir/toolchain-arm_cortex-a7+neon-vfpv4_gcc-7.4.0_musl_eabi
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GCC=$STAGING_DIR/bin/arm-openwrt-linux-gcc
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OBJDUMP=$STAGING_DIR/bin/arm-openwrt-linux-objdump
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OBJCOPY=$STAGING_DIR/bin/arm-openwrt-linux-objcopy
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LD=$STAGING_DIR/bin/arm-openwrt-linux-ld
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${OBJDUMP} -x kernel.elf > ./kernel.headers
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#${OBJDUMP} -x kernel-new.elf > ./kernel.headers
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#${OBJCOPY} -j .text -j initrd -S ./kernel.elf ./kernel.OWL1
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#${OBJCOPY} -R initrd -S ./kernel.elf ./kernel.OWL1
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#${OBJCOPY} -j .rodata -O binary ./kernel.elf ./kernel.OWL1
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#initrd is kernel.p2-p3
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init/compile_for_arm.sh
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init/compile_for_arm.sh
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#!/bin/bash
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OPENWRT_DIR=/home/prog/openwrt/lede-all/2019-openwrt-all/openwrt-ipq806x
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export STAGING_DIR=$OPENWRT_DIR/staging_dir/toolchain-arm_cortex-a15+neon-vfpv4_gcc-7.4.0_musl_eabi
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#OPENWRT_DIR=/home/prog/openwrt/lede-all/2019-openwrt-all/openwrt-ipq4xxx
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#export STAGING_DIR=${OPENWRT_DIR}/staging_dir/toolchain-arm_cortex-a7+neon-vfpv4_gcc-7.4.0_musl_eabi
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GCC=$STAGING_DIR/bin/arm-openwrt-linux-gcc
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OD=$STAGING_DIR/bin/arm-openwrt-linux-objdump
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OC=$STAGING_DIR/bin/arm-openwrt-linux-objcopy
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LD=$STAGING_DIR/bin/arm-openwrt-linux-ld
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$GCC -static ./init.c -o ../cpio-fs/init
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$OC --strip-all ../cpio-fs/init ../cpio-fs/init
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init/init.c
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init/init.c
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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extern char** environ;
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int main(int argc, char *argv[]){
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char *new_argv[] = { "/bin/busybox", "sh", "/etc/rc.d/rc.S", NULL };
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environ[0] = "PATH=/sbin:/bin";
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environ[1] = NULL;
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execvp(new_argv[0], new_argv);
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return 0;
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}
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BIN
kernel.elf
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kernel.elf
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pack.sh
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pack.sh
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#!/bin/sh
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OPENWRT_DIR=/home/prog/openwrt/lede-all/2019-openwrt-all/openwrt-ipq806x
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export STAGING_DIR=$OPENWRT_DIR/staging_dir/toolchain-arm_cortex-a15+neon-vfpv4_gcc-7.4.0_musl_eabi
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#OPENWRT_DIR=/home/prog/openwrt/lede-all/2019-openwrt-all/openwrt-ipq4xxx
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#export STAGING_DIR=${OPENWRT_DIR}/staging_dir/toolchain-arm_cortex-a7+neon-vfpv4_gcc-7.4.0_musl_eabi
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GCC=$STAGING_DIR/bin/arm-openwrt-linux-gcc
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OBJDUMP=$STAGING_DIR/bin/arm-openwrt-linux-objdump
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OBJCOPY=$STAGING_DIR/bin/arm-openwrt-linux-objcopy
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LD=$STAGING_DIR/bin/arm-openwrt-linux-ld
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cd cpio-fs
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#find . 2>/dev/null | cpio --quiet -o --format='newc' > ../bins/x1.cpio
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find . 2>/dev/null | cpio --quiet -o --format='newc' | \
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xz --check=crc32 --lzma2=dict=512KiB > ../bins/kernel.p3-new.xz
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#cat ../initramfs.cpio | xz --check=crc32 --lzma2=dict=512KiB > ../bins/kernel.p3-new.xz
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cd ..
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cat ./bins/kernel.p2.xz ./bins/kernel.p3-new.xz > ./bins/kernel-new.combo
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${OBJCOPY} --update-section initrd=./bins/kernel-new.combo ./kernel.elf ./kernel-new.elf
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cat ./kernel-new.elf > /var/lib/tftpboot/linux_t1.bin
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16
unpack.sh
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unpack.sh
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#!/bin/sh
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exit 0
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dd if=kernel.elf bs=1 skip=0 count=43504 of=./bins/kernel.HEAD
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dd if=kernel.elf bs=1 skip=43504 count=1605632 of=./bins/kernel.p2.xz
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dd if=kernel.elf bs=1 skip=1649136 count=84812 of=./bins/kernel.p3.xz
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dd if=kernel.elf bs=1 skip=1733948 of=./bins/kernel.TAIL
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#( xz -dc --single-stream > ./bins/initramfs.cpio && cat > ./bins/p3-tail.bin ) < ./bins/kernel.p3.xz
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xz -dc > ./bins/initramfs.cpio < ./bins/kernel.p3.xz
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rm -Rf cpio-fs
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mkdir cpio-fs
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cd cpio-fs
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cpio -idv < ../bins/initramfs.cpio
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