linux_dsm_epyc7002/arch/x86/boot
Matt Fleming 9cb0e39423 x86/efi: Fixup GOT in all boot code paths
Maarten reported that his Macbook pro 8.2 stopped booting after commit
f23cf8bd5c ("efi/x86: efistub: Move shared dependencies to
<asm/efi.h>"), the main feature of which is changing the visibility of
symbol 'efi_early' from local to global.

By making 'efi_early' global we end up requiring an entry in the Global
Offset Table. Unfortunately, while we do include code to fixup GOT
entries in the early boot code, it's only called after we've executed
the EFI boot stub.

What this amounts to is that references to 'efi_early' in the EFI boot
stub don't point to the correct place.

Since we've got multiple boot entry points we need to be prepared to
fixup the GOT in multiple places, while ensuring that we never do it
more than once, otherwise the GOT entries will still point to the wrong
place.

Reported-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Tested-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
2014-09-08 20:52:02 +01:00
..
compressed x86/efi: Fixup GOT in all boot code paths 2014-09-08 20:52:02 +01:00
tools x86/efi: Include a .bss section within the PE/COFF headers 2014-07-10 14:21:39 +01:00
.gitignore
a20.c
apm.c
bioscall.S
bitops.h
boot.h x86, boot: Move memcmp() into string.h and string.c 2014-03-19 15:44:04 -07:00
cmdline.c
code16gcc.h x86, build: Change code16gcc.h from a C header to an assembly header 2014-06-04 13:16:48 -07:00
copy.S
cpu.c
cpucheck.c Merge branch 'x86/boot' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-04-02 12:23:49 -07:00
cpuflags.c
cpuflags.h
ctype.h
early_serial_console.c
edd.c x86, boot: Create a separate string.h file to provide standard string functions 2014-03-19 15:43:45 -07:00
header.S Merge branch 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-08-04 17:13:50 -07:00
install.sh
main.c x86, boot: Create a separate string.h file to provide standard string functions 2014-03-19 15:43:45 -07:00
Makefile x86, build: Don't get confused by local symbols 2014-05-05 15:23:35 -07:00
mca.c
memory.c
mkcpustr.c
mtools.conf.in
pm.c
pmjump.S
printf.c
regs.c x86, boot: Create a separate string.h file to provide standard string functions 2014-03-19 15:43:45 -07:00
setup.ld
string.c x86, boot: Remove misc.h inclusion from compressed/string.c 2014-05-08 08:00:06 -07:00
string.h x86, boot: Move memcmp() into string.h and string.c 2014-03-19 15:44:04 -07:00
tty.c
version.c
vesa.h
video-bios.c
video-mode.c
video-vesa.c x86, boot: Create a separate string.h file to provide standard string functions 2014-03-19 15:43:45 -07:00
video-vga.c
video.c
video.h