can i ask how to install liblzma-5 please? in system? in the program?
You just put the .dll in the same directory as the payload-dumper-go .exe; the issue could be pretty easily avoided if it were compiled static.
In fact, I spent some time today figuring out how to static cross-compile payload-dumper-go from my Ubuntu VM to Win32, Linux x86 and armhf, since it's usually better to go for lowest common denominator, and of course having arm since on-device is where payload-dumper-go might be most useful!
After digging into the recent
Docker commit for some hints, then adding stripping and disabling DWARF debugging info generation to have the smallest binary possible, here are my notes for Linux x86:
Bash:
# install latest Go (currently 1.16.2) to /usr/local/go per the Linux instructions at https://golang.org/doc/install
export PATH=$PATH:/usr/local/go/bin
git clone https://github.com/ssut/payload-dumper-go
cd payload-dumper-go
apt-get install liblzma-dev
GOOS=linux GOARCH=386 CGO_ENABLED=1 CC=i686-linux-gnu-gcc go build -a -ldflags '-extldflags "-static -s -w"'
Then, I found that payload-dumper-go's go-xz dependency also in turn being dependent on the toolchain
hopefully containing liblzma is extremely problematic/frustrating for Go cross-compiling, but was able to hack the MSYS2 mingw-w64-i686-xz liblzma into the Ubuntu mingw-w64 toolchain to make a static Win32 build:
Bash:
apt-get install mingw-w64
# install include and lib from https://packages.msys2.org/package/mingw-w64-i686-xz to /usr/i686-w64-mingw32
GOOS=windows GOARCH=386 CGO_ENABLED=1 CC=i686-w64-mingw32-gcc go build -a -ldflags '-extldflags "-static -s -w"'
And finally, for Android, NDK gcc wasn't cooperating with `go build` but, since we're building static, Linux armhf will still work fine, but we still need a similar trick to get Ubuntu's own armhf liblzma into the armhf toolchain:
Bash:
apt-get install gcc-arm-linux-gnueabihf
# install include and lib from https://launchpad.net/ubuntu/bionic/armhf/liblzma-dev/5.2.2-1.3 to /usr/arm-linux-gnueabihf
GOOS=linux GOARCH=arm GOARM=7 CGO_ENABLED=1 CC=arm-linux-gnueabihf-gcc go build -a -ldflags '-extldflags "-static -s -w"'
I also noticed it doesn't print instructions even though there are some in the code, and have added a PR to fix that:
https://github.com/ssut/payload-dumper-go/pull/5
Hopefully
@ssssut will still see about adding Incremental OTA support at some point, maybe do something about go-xz to make cross-compiling easier, and ideally add a feature to only dump specific partitions, since extracting the entire payload.bin can be time-consuming (and RAM-consuming!) when all you want is boot.img.
So, without further ado, here are my builds:
[ Attachments removed since they're now superseded by
CI releases on GitHub in all major architectures! ]