mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-23 02:05:57 +01:00
split build and run scripts due to option conflicts
Remove -v from travis as it blew log length
This commit is contained in:
Ciro Santilli
@@ -4,8 +4,9 @@ sudo: required
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||||
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install: |
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cd "$TRAVIS_BUILD_DIR"
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./configure -t
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bash -x ./configure -t
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||||
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script: |
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cd "$TRAVIS_BUILD_DIR"
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bash -x ./run -e 'init=/poweroff.out' -j 16 -n -v
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bash -x ./build -j 16
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bash -x ./run -e 'init=/poweroff.out' -n
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|
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@@ -6,6 +6,6 @@ Testing you should do before pushing: new modules:
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New arch:
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||||
|
||||
- `./run -a ARCH`
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- `./build -a ARCH && ./run -a ARCH`
|
||||
- `wget google.com` for Internet
|
||||
- `./runqemu -a ARCH -d` and `./rungdb -a ARCH`
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- `./run -a ARCH -d` and `./rungdb -a ARCH`
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|
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77
build
Executable file
77
build
Executable file
@@ -0,0 +1,77 @@
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#!/usr/bin/env bash
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set -e
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arch=x86_64
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extra_targets=''
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j="$(($(nproc) - 2))"
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x11=false
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||||
v=0
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||||
while getopts 'a:e:j:nt:v' OPT; do
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||||
case "$OPT" in
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||||
a)
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arch="$OPTARG"
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||||
;;
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j)
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j="$OPTARG"
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;;
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t)
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extra_targets="$extra_args $OPTARG"
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||||
;;
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x)
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x11=true
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;;
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v)
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v=1
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;;
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esac
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done
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case "$arch" in
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||||
x86_64)
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defconfig=qemu_x86_64_defconfig
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;;
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||||
arm)
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# qemu_arm_vexpress_defconfig required a newer QEMU than 2.0.0 on a Ubuntu host.
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||||
# so let's stick to versatile for now.
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defconfig=qemu_arm_versatile_defconfig
|
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;;
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||||
aarch64)
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defconfig=qemu_aarch64_virt_defconfig
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;;
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mips64)
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defconfig=qemu_mips64r6_malta_defconfig
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;;
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esac
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cd kernel_module
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./make-host.sh -j "$j" clean
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cd ../buildroot
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for p in $(find '../buildroot_patches/' -maxdepth 1 -name '*.patch' -print); do
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patch -N -r - -p 1 <"$p" || :
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done
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outdir="output.${arch}~"
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make O="$outdir" BR2_EXTERNAL="$(pwd)/../kernel_module" "$defconfig"
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# TODO Can't get rid of this for now.
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# http://stackoverflow.com/questions/44078245/is-it-possible-to-use-config-fragments-with-buildroots-config
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cat ../buildroot_config_fragment >> "${outdir}/.config"
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if $x11; then
|
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cat ../buildroot_config_fragment_x11 >> "${outdir}/.config"
|
||||
fi
|
||||
make O="$outdir" olddefconfig
|
||||
# HOST_QEMU_OPTS is a hack that happens to work because the QEMU package luckly uses += at all times.
|
||||
# It shouldn't be necessary in the first place: https://bugs.busybox.net/show_bug.cgi?id=9936
|
||||
#
|
||||
# Even if were an autotools package, there is no general way currently to pass extra configs to it:
|
||||
# https://stackoverflow.com/questions/44341188/how-to-pass-extra-custom-configure-autotools-options-to-a-buildroot-package/44341225#44341225
|
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time \
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env \
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-u LD_LIBRARY_PATH \
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make \
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O="$outdir" \
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BR2_JLEVEL="$j" \
|
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HOST_QEMU_OPTS="--enable-debug --enable-sdl --extra-cflags='-DDEBUG_PL061=1' --with-sdlabi=2.0 --enable-trace-backends=simple" \
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||||
V="$v" \
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kernel_module-rebuild \
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$extra_targets \
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all \
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;
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cd ..
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./runqemu "$@"
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@@ -8,7 +8,7 @@
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|
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Best attempt so far:
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time ./runqemu -n -e 'init=/poweroff.out' -- -trace exec_tb,file=trace && \
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time ./run -n -e 'init=/poweroff.out' -- -trace exec_tb,file=trace && \
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time ./qemu/scripts/simpletrace.py qemu/trace-events trace >trace.txt && \
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wc -l trace.txt && \
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sed '/0x1000000/q' trace.txt >trace-boot.txt && \
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|
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@@ -2,7 +2,7 @@
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||||
|
||||
To GDB the Linux kernel, first run:
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|
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./runqemu -d
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./run -d
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|
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If you want to break immediately at a symbol, e.g. `start_kernel` of the boot sequence, run on another shell:
|
||||
|
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@@ -46,7 +46,7 @@ So we cannot set the breakpoints before `insmod`.
|
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|
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However, the Linux kernel GDB scripts offer the `lx-symbols` command, which takes care of that beautifully for us:
|
||||
|
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./runqemu -d
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./run -d
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./rungdb
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|
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In QEMU:
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|
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@@ -91,7 +91,7 @@ Custom init process:
|
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|
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- Shell 1:
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|
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./runqemu -d -e 'init=/sleep_forever.out' -n
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./run -d -e 'init=/sleep_forever.out' -n
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- Shell 2:
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@@ -101,7 +101,7 @@ BusyBox custom init process:
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|
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- Shell 1:
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|
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./runqemu -d -e 'init=/bin/ls' -n
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./run -d -e 'init=/bin/ls' -n
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- Shell 2:
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||||
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@@ -113,7 +113,7 @@ BusyBox default init process:
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- Shell 1:
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./runqemu -d -n
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./run -d -n
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- Shell 2:
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@@ -127,7 +127,7 @@ Non-init process:
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- Shell 1
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./runqemu -d -n
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./run -d -n
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- Shell 2
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@@ -47,6 +47,7 @@ Reserve 12Gb of disk:
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git clone --recursive https://github.com/cirosantilli/linux-kernel-module-cheat
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cd linux-kernel-module-cheat
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./configure
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./build
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./run
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||||
The first build will take a while ([GCC](https://stackoverflow.com/questions/10833672/buildroot-environment-with-host-toolchain), Linux kernel), e.g.:
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@@ -80,23 +81,18 @@ Good bets inside guest are:
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||||
/modulename.sh
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||||
/modulename.out
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||||
|
||||
## Save rebuild time
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||||
## Rebuild
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||||
After the first build, you can also run just:
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./runqemu
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||||
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to save a few seconds. `./run` wouldn't rebuild everything, but checking timestamps takes a few moments.
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If you make changes to the kernel modules or most configurations, you can just use again:
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If you make changes to the kernel modules or most configurations tracked on this repository, you can just use again:
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./build
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./run
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||||
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and they will updated.
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and the modified files will be rebuilt.
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||||
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But if you change any package besides `kernel_module`, you must also request those packages to be reconfigured or rebuilt with extra targets, e.g.:
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If you change any package besides `kernel_module`, you must also request those packages to be reconfigured or rebuilt with extra targets, e.g.:
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||||
|
||||
./run -t linux-reconfigure -t host-qemu-reconfigure
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||||
./build -t linux-reconfigure -t host-qemu-reconfigure
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||||
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||||
Those aren't turned on by default because they take quite a few seconds.
|
||||
|
||||
@@ -104,20 +100,20 @@ Those aren't turned on by default because they take quite a few seconds.
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||||
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||||
The root filesystem is persistent across:
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||||
|
||||
./runqemu
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||||
./run
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||||
date >f
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||||
sync
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||||
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||||
then:
|
||||
|
||||
./runqemu
|
||||
./run
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||||
cat f
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||||
|
||||
This is particularly useful to re-run shell commands from the history of a previous session with `Ctrl + R`.
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||||
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When you do:
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./run
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./build
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||||
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||||
the disk image gets overwritten by a fresh filesystem and you lose all changes.
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||||
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||||
@@ -144,7 +140,7 @@ but I never managed to increase that buffer:
|
||||
|
||||
Show serial output of QEMU directly on the current terminal, without opening a QEMU window:
|
||||
|
||||
./runqemu -n
|
||||
./run -n
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||||
|
||||
To exit, just do a regular:
|
||||
|
||||
@@ -273,7 +269,7 @@ When you start interacting with QEMU hardware, it is useful to see what is going
|
||||
|
||||
This is of course trivial since QEMU is just an userland program on the host, but we make it a bit easier with:
|
||||
|
||||
./runqemu -q
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||||
./run -q
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||||
|
||||
Then you could:
|
||||
|
||||
|
||||
6
init.md
6
init.md
@@ -20,11 +20,11 @@ Is the default BusyBox `/init` too bloated for you, minimalism freak?
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||||
|
||||
No problem, just use the `init` kernel boot parameter:
|
||||
|
||||
./runqemu -e 'init=/sleep_forever.out'
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||||
./run -e 'init=/sleep_forever.out'
|
||||
|
||||
Remember that shell scripts can also be used for `init` <https://unix.stackexchange.com/questions/174062/init-as-a-shell-script/395375#395375>:
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||||
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||||
./runqemu -e 'init=/count.sh'
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./run -e 'init=/count.sh'
|
||||
|
||||
Also remember that if your init returns, the kernel will panic, there are just two non-panic possibilities:
|
||||
|
||||
@@ -41,4 +41,4 @@ Add this line to `rootfs_post_build_script`:
|
||||
|
||||
To restore it, run:
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||||
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||||
./run -t initscripts-reconfigure
|
||||
./build -t initscripts-reconfigure
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||||
|
||||
2
kgdb.md
2
kgdb.md
@@ -8,7 +8,7 @@ Cheaper than JTAG (free) and easier to setup (all you need is serial), but with
|
||||
|
||||
Usage:
|
||||
|
||||
./runqemu -k
|
||||
./run -k
|
||||
./rungdb -k
|
||||
|
||||
In GDB:
|
||||
|
||||
@@ -6,15 +6,12 @@ The portability of the kernel and toolchains is amazing: change an option and mo
|
||||
|
||||
First build:
|
||||
|
||||
./build -a arm
|
||||
./run -a arm
|
||||
|
||||
Run without build:
|
||||
|
||||
./runqemu -a arm
|
||||
|
||||
Debug:
|
||||
|
||||
./runqemu -a arm -d
|
||||
./run -a arm -d
|
||||
# On another terminal.
|
||||
./rungdb -a arm
|
||||
|
||||
@@ -25,7 +22,7 @@ TODOs:
|
||||
|
||||
## aarch64
|
||||
|
||||
./run -a aarch64
|
||||
./build -a aarch64
|
||||
|
||||
TODOs:
|
||||
|
||||
@@ -39,4 +36,4 @@ TODOs:
|
||||
|
||||
## mips64
|
||||
|
||||
./run -a mips64
|
||||
./build -a mips64
|
||||
|
||||
173
run
173
run
@@ -1,77 +1,120 @@
|
||||
#!/usr/bin/env bash
|
||||
|
||||
set -e
|
||||
arch='x86_64'
|
||||
extra_targets=''
|
||||
j="$(($(nproc) - 2))"
|
||||
x11=false
|
||||
v=0
|
||||
while getopts a:e:j:nt:v OPT; do
|
||||
|
||||
# CLI handling.
|
||||
arch=x86_64
|
||||
debug=false
|
||||
debug_qemu=''
|
||||
kgdb=false
|
||||
nographic=false
|
||||
# norandmaps: Don't use address space randomization. Equivalent to echo 0 > /proc/sys/kernel/randomize_va_space.
|
||||
# printk.time=y: log in format: "[time ] msg" for all printk messages.
|
||||
extra_append='norandmaps printk.devkmsg=on printk.time=y'
|
||||
extra_flags=''
|
||||
while getopts a:de:knqt:x OPT; do
|
||||
case "$OPT" in
|
||||
'a')
|
||||
a)
|
||||
arch="$OPTARG"
|
||||
;;
|
||||
'j')
|
||||
j="$OPTARG"
|
||||
;;
|
||||
't')
|
||||
extra_targets="$extra_args $OPTARG"
|
||||
;;
|
||||
'x')
|
||||
x11=true
|
||||
;;
|
||||
'v')
|
||||
v=1
|
||||
;;
|
||||
;;
|
||||
d)
|
||||
debug=true
|
||||
extra_flags="$extra_flags -S -s"
|
||||
;;
|
||||
e)
|
||||
extra_append="$extra_append $OPTARG"
|
||||
;;
|
||||
k)
|
||||
debug=true
|
||||
extra_append="$extra_append kgdbwait"
|
||||
# For those who want to try KDB.
|
||||
#extra_append="$extra_append kgdbwait kgdboc=kbd"
|
||||
extra_flags="$extra_flags -serial tcp::1234,server,nowait"
|
||||
kgdb=true
|
||||
;;
|
||||
n)
|
||||
extra_append="$extra_append console=ttyS0"
|
||||
extra_flags="$extra_flags -nographic"
|
||||
nographic=true
|
||||
;;
|
||||
q)
|
||||
debug_qemu='gdb -q -ex start --args'
|
||||
;;
|
||||
esac
|
||||
done
|
||||
shift "$(($OPTIND - 1))"
|
||||
extra_flags="$extra_flags $@"
|
||||
|
||||
buildroot_out_dir="./buildroot/output.${arch}~"
|
||||
images_dir="$buildroot_out_dir/images"
|
||||
qemu_common="\
|
||||
$debug_qemu \
|
||||
$buildroot_out_dir/host/usr/bin/qemu-system-${arch} \
|
||||
-m 128M \
|
||||
-monitor telnet::45454,server,nowait \
|
||||
-netdev user,hostfwd=tcp::45455-:45455,id=net0 \
|
||||
-smp 1 \
|
||||
"
|
||||
# The base QEMU commands are found under board/qemu/*/readme.tx
|
||||
case "$arch" in
|
||||
'x86_64')
|
||||
defconfig='qemu_x86_64_defconfig'
|
||||
x86_64)
|
||||
if $kgdb; then
|
||||
extra_append="$extra_append kgdboc=ttyS0,115200"
|
||||
fi
|
||||
cmd="$qemu_common \
|
||||
-M pc \
|
||||
-append 'root=/dev/vda nopat $extra_append' \
|
||||
-device edu \
|
||||
-device lkmc_pci_min \
|
||||
-device virtio-net-pci,netdev=net0 \
|
||||
-drive file=${images_dir}/rootfs.ext2,if=virtio,format=raw \
|
||||
-kernel ${images_dir}/bzImage \
|
||||
$extra_flags \
|
||||
"
|
||||
;;
|
||||
'arm')
|
||||
# qemu_arm_vexpress_defconfig required a newer QEMU than 2.0.0 on a Ubuntu host.
|
||||
# so let's stick to versatile for now.
|
||||
defconfig='qemu_arm_versatile_defconfig'
|
||||
arm)
|
||||
if $kgdb; then
|
||||
extra_append="$extra_append kgdboc=ttyAMA0,115200"
|
||||
fi
|
||||
cmd="$qemu_common \
|
||||
-M versatilepb \
|
||||
-append 'root=/dev/sda $extra_append' \
|
||||
-device rtl8139,netdev=net0 \
|
||||
-drive file=${images_dir}/rootfs.ext2,if=scsi,format=raw \
|
||||
-dtb ${images_dir}/versatile-pb.dtb \
|
||||
-kernel ${images_dir}/zImage \
|
||||
-serial stdio \
|
||||
$extra_flags \
|
||||
"
|
||||
;;
|
||||
'aarch64')
|
||||
defconfig='qemu_aarch64_virt_defconfig'
|
||||
aarch64)
|
||||
if $kgdb; then
|
||||
extra_append="$extra_append kgdboc=ttyAMA0,115200"
|
||||
fi
|
||||
cmd="$qemu_common \
|
||||
-M virt \
|
||||
-append 'root=/dev/sda $extra_append' \
|
||||
-cpu cortex-a57 \
|
||||
-device virtio-net-device,netdev=net0 \
|
||||
-drive file=${images_dir}/rootfs.cpio,if=scsi,format=raw \
|
||||
-kernel ${images_dir}/Image \
|
||||
-nographic \
|
||||
-serial stdio \
|
||||
$extra_flags \
|
||||
"
|
||||
;;
|
||||
'mips64')
|
||||
defconfig='qemu_mips64r6_malta_defconfig'
|
||||
mips64)
|
||||
cmd="$qemu_common \
|
||||
-M malta \
|
||||
-append 'root=/dev/hda $extra_append' \
|
||||
-cpu I6400 \
|
||||
-device pcnet \
|
||||
-drive file=${images_dir}/rootfs.ext2,format=raw \
|
||||
-kernel ${images_dir}/vmlinux \
|
||||
-nographic \
|
||||
$extra_flags \
|
||||
"
|
||||
;;
|
||||
esac
|
||||
|
||||
cd kernel_module
|
||||
./make-host.sh -j "$j" clean
|
||||
cd ../buildroot
|
||||
for p in $(find '../buildroot_patches/' -maxdepth 1 -name '*.patch' -print); do
|
||||
patch -N -r - -p 1 <"$p" || :
|
||||
done
|
||||
outdir="output.${arch}~"
|
||||
make O="$outdir" BR2_EXTERNAL="$(pwd)/../kernel_module" "$defconfig"
|
||||
# TODO Can't get rid of this for now.
|
||||
# http://stackoverflow.com/questions/44078245/is-it-possible-to-use-config-fragments-with-buildroots-config
|
||||
cat ../buildroot_config_fragment >> "${outdir}/.config"
|
||||
if $x11; then
|
||||
cat ../buildroot_config_fragment_x11 >> "${outdir}/.config"
|
||||
fi
|
||||
make O="$outdir" olddefconfig
|
||||
# HOST_QEMU_OPTS is a hack that happens to work because the QEMU package luckly uses += at all times.
|
||||
# It shouldn't be necessary in the first place: https://bugs.busybox.net/show_bug.cgi?id=9936
|
||||
#
|
||||
# Even if were an autotools package, there is no general way currently to pass extra configs to it:
|
||||
# https://stackoverflow.com/questions/44341188/how-to-pass-extra-custom-configure-autotools-options-to-a-buildroot-package/44341225#44341225
|
||||
time \
|
||||
env \
|
||||
-u LD_LIBRARY_PATH \
|
||||
make \
|
||||
O="$outdir" \
|
||||
BR2_JLEVEL="$j" \
|
||||
HOST_QEMU_OPTS="--enable-debug --enable-sdl --extra-cflags='-DDEBUG_PL061=1' --with-sdlabi=2.0 --enable-trace-backends=simple" \
|
||||
V="$v" \
|
||||
kernel_module-rebuild \
|
||||
$extra_targets \
|
||||
all \
|
||||
;
|
||||
cd ..
|
||||
./runqemu "$@"
|
||||
echo "$cmd"
|
||||
eval "$cmd"
|
||||
|
||||
120
runqemu
120
runqemu
@@ -1,120 +0,0 @@
|
||||
#!/usr/bin/env bash
|
||||
|
||||
set -e
|
||||
|
||||
# CLI handling.
|
||||
arch='x86_64'
|
||||
debug=false
|
||||
debug_qemu=''
|
||||
kgdb=false
|
||||
nographic=false
|
||||
# norandmaps: Don't use address space randomization. Equivalent to echo 0 > /proc/sys/kernel/randomize_va_space.
|
||||
# printk.time=y: log in format: "[time ] msg" for all printk messages.
|
||||
extra_append='norandmaps printk.devkmsg=on printk.time=y'
|
||||
extra_flags=''
|
||||
while getopts a:de:knqt:x OPT; do
|
||||
case "$OPT" in
|
||||
a)
|
||||
arch="$OPTARG"
|
||||
;;
|
||||
d)
|
||||
debug=true
|
||||
extra_flags="$extra_flags -S -s"
|
||||
;;
|
||||
e)
|
||||
extra_append="$extra_append $OPTARG"
|
||||
;;
|
||||
k)
|
||||
debug=true
|
||||
extra_append="$extra_append kgdbwait"
|
||||
# For those who want to try KDB.
|
||||
#extra_append="$extra_append kgdbwait kgdboc=kbd"
|
||||
extra_flags="$extra_flags -serial tcp::1234,server,nowait"
|
||||
kgdb=true
|
||||
;;
|
||||
n)
|
||||
extra_append="$extra_append console=ttyS0"
|
||||
extra_flags="$extra_flags -nographic"
|
||||
nographic=true
|
||||
;;
|
||||
q)
|
||||
debug_qemu='gdb -q -ex start --args'
|
||||
;;
|
||||
esac
|
||||
done
|
||||
shift "$(($OPTIND - 1))"
|
||||
extra_flags="$extra_flags $@"
|
||||
|
||||
buildroot_out_dir="./buildroot/output.${arch}~"
|
||||
images_dir="$buildroot_out_dir/images"
|
||||
qemu_common="\
|
||||
$debug_qemu \
|
||||
$buildroot_out_dir/host/usr/bin/qemu-system-${arch} \
|
||||
-m 128M \
|
||||
-monitor telnet::45454,server,nowait \
|
||||
-netdev user,hostfwd=tcp::45455-:45455,id=net0 \
|
||||
-smp 1 \
|
||||
"
|
||||
# The base QEMU commands are found under board/qemu/*/readme.tx
|
||||
case "$arch" in
|
||||
'x86_64')
|
||||
if $kgdb; then
|
||||
extra_append="$extra_append kgdboc=ttyS0,115200"
|
||||
fi
|
||||
cmd="$qemu_common \
|
||||
-M pc \
|
||||
-append 'root=/dev/vda nopat $extra_append' \
|
||||
-device edu \
|
||||
-device lkmc_pci_min \
|
||||
-device virtio-net-pci,netdev=net0 \
|
||||
-drive file=${images_dir}/rootfs.ext2,if=virtio,format=raw \
|
||||
-kernel ${images_dir}/bzImage \
|
||||
$extra_flags \
|
||||
"
|
||||
;;
|
||||
'arm')
|
||||
if $kgdb; then
|
||||
extra_append="$extra_append kgdboc=ttyAMA0,115200"
|
||||
fi
|
||||
cmd="$qemu_common \
|
||||
-M versatilepb \
|
||||
-append 'root=/dev/sda $extra_append' \
|
||||
-device rtl8139,netdev=net0 \
|
||||
-drive file=${images_dir}/rootfs.ext2,if=scsi,format=raw \
|
||||
-dtb ${images_dir}/versatile-pb.dtb \
|
||||
-kernel ${images_dir}/zImage \
|
||||
-serial stdio \
|
||||
$extra_flags \
|
||||
"
|
||||
;;
|
||||
'aarch64')
|
||||
if $kgdb; then
|
||||
extra_append="$extra_append kgdboc=ttyAMA0,115200"
|
||||
fi
|
||||
cmd="$qemu_common \
|
||||
-M virt \
|
||||
-append 'root=/dev/sda $extra_append' \
|
||||
-cpu cortex-a57 \
|
||||
-device virtio-net-device,netdev=net0 \
|
||||
-drive file=${images_dir}/rootfs.cpio,if=scsi,format=raw \
|
||||
-kernel ${images_dir}/Image \
|
||||
-nographic \
|
||||
-serial stdio \
|
||||
$extra_flags \
|
||||
"
|
||||
;;
|
||||
'mips64')
|
||||
cmd="$qemu_common \
|
||||
-M malta \
|
||||
-append 'root=/dev/hda $extra_append' \
|
||||
-cpu I6400 \
|
||||
-device pcnet \
|
||||
-drive file=${images_dir}/rootfs.ext2,format=raw \
|
||||
-kernel ${images_dir}/vmlinux \
|
||||
-nographic \
|
||||
$extra_flags \
|
||||
"
|
||||
;;
|
||||
esac
|
||||
echo "$cmd"
|
||||
eval "$cmd"
|
||||
5
x11.md
5
x11.md
@@ -4,9 +4,10 @@ Only tested successfully in `x86_64`.
|
||||
|
||||
Build:
|
||||
|
||||
./run -x
|
||||
./build -x
|
||||
./run
|
||||
|
||||
We don't build X11 by default because it takes a considerable amount of time (~20%), and is not expected to be used by most users.
|
||||
We don't build X11 by default because it takes a considerable amount of time (~20%), and is not expected to be used by most users: you need to pass the `-x` flag to enable it.
|
||||
|
||||
Inside QEMU:
|
||||
|
||||
|
||||
Reference in New Issue
Block a user