mirror of
https://github.com/hardkernel/linux.git
synced 2026-06-09 12:17:12 +09:00
1837a06a16
[ Upstream commit5564597d51] Commit6975a783d7("powerpc/boot: Allow building the zImage wrapper as a relocatable ET_DYN", 2011-04-12) changed the procedure descriptor at the start of crt0.S to have a hard-coded start address of 0x500000 rather than a reference to _zimage_start, presumably because having a reference to a symbol introduced a relocation which is awkward to handle in a position-independent executable. Unfortunately, what is at 0x500000 in the COFF image is not the first instruction, but the procedure descriptor itself, that is, a word containing 0x500000, which is not a valid instruction. Hence, booting a COFF zImage results in a "DEFAULT CATCH!, code=FFF00700" message from Open Firmware. This fixes the problem by (a) putting the procedure descriptor in the data section and (b) adding a branch to _zimage_start as the first instruction in the program. Fixes:6975a783d7("powerpc/boot: Allow building the zImage wrapper as a relocatable ET_DYN") Signed-off-by: Paul Mackerras <paulus@ozlabs.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Sasha Levin <sashal@kernel.org>
To extract the kernel vmlinux, System.map, .config or initrd from the zImage binary: objcopy -j .kernel:vmlinux -O binary zImage vmlinux.gz objcopy -j .kernel:System.map -O binary zImage System.map.gz objcopy -j .kernel:.config -O binary zImage config.gz objcopy -j .kernel:initrd -O binary zImage.initrd initrd.gz Peter