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e869cd4ccb
>From the kernel patch:
[
It was observed that the kernel embeds the path in the x86 boot
artifacts.
From https://bugzilla.yoctoproject.org/show_bug.cgi?id=13458:
[
If you turn on the buildpaths QA test, or try a reproducible build, you
discover that the kernel image contains build paths.
$ strings bzImage-5.0.19-yocto-standard |grep tmp/
out of pgt_buf in
/data/poky-tmp/reproducible/tmp/work-shared/qemux86-64/kernel-source/arch/x86/boot/compressed/kaslr_64.c!?
But what's this in the top-level Makefile:
$ git grep prefix-map
Makefile:KBUILD_CFLAGS += $(call
cc-option,-fmacro-prefix-map=$(srctree)/=)
So the __FILE__ shouldn't be using the full path. However
arch/x86/boot/compressed/Makefile has this:
KBUILD_CFLAGS := -m$(BITS) -O2
So that clears KBUILD_FLAGS, removing the -fmacro-prefix-map option.
]
Other architectures do not clear the flags, but instead prune before
adding boot or specific options. There's no obvious reason why x86 isn't
doing the same thing (pruning vs clearing) and no build or boot issues
have been observed.
So we make x86 can do the same thing, and we no longer have embedded paths.
]
This issue has been reported upstream, and a patch submission is
pending, but for now, we'll soak the proposed patch in linux-yocto to
see if any issues are found
[YOCTO: #13458]
(From OE-Core rev: 78b0ff5960814af935a8089ec49c51d76f148149)
(From OE-Core rev: a45a6e12d6ce3a531ad924d3e548de8a95055866)
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
QEMU Emulation Targets ====================== To simplify development, the build system supports building images to work with the QEMU emulator in system emulation mode. Several architectures are currently supported in 32 and 64 bit variants: * ARM (qemuarm + qemuarm64) * x86 (qemux86 + qemux86-64) * PowerPC (qemuppc only) * MIPS (qemumips + qemumips64) Use of the QEMU images is covered in the Yocto Project Reference Manual. The appropriate MACHINE variable value corresponding to the target is given in brackets.