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Filename Latest commit message Latest commit date
Paul Mackerras 5564597d51 powerpc: Fix COFF zImage booting on old powermacs
Commit 6975a783d7 ("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>
2018-11-27 10:55:11 +11:00
arch powerpc: Fix COFF zImage booting on old powermacs 2018-11-27 10:55:11 +11:00
block
certs
crypto
Documentation This pull request contains updates for UBIFS: 2018-11-04 14:46:04 -08:00
drivers This pull request contains updates for UBIFS: 2018-11-04 14:46:04 -08:00
firmware
fs This pull request contains updates for UBIFS: 2018-11-04 14:46:04 -08:00
include NFS client bugfixes for Linux 4.20 2018-11-04 08:20:09 -08:00
init
ipc
kernel Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-11-03 18:37:09 -07:00
lib
LICENSES
mm
net NFS client bugfixes for Linux 4.20 2018-11-04 08:20:09 -08:00
samples
scripts Kbuild updates for v4.20 (2nd) 2018-11-03 10:47:33 -07:00
security
sound
tools selftests/powerpc: Adjust wild_bctr to build with old binutils 2018-11-15 23:05:17 +11:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
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Makefile Linux 4.20-rc1 2018-11-04 15:37:52 -08:00
README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.