https://github.com/torvalds/linux
Revision 584fd3b31889852d0d6f3dd1e3d8e9619b660d2c authored by Peter Zijlstra on 07 June 2021, 09:45:58 UTC, committed by Peter Zijlstra on 10 June 2021, 08:08:24 UTC
When an ELF object uses extended symbol section indexes (IOW it has a
.symtab_shndx section), these must be kept in sync with the regular
symbol table (.symtab).

So for every new symbol we emit, make sure to also emit a
.symtab_shndx value to keep the arrays of equal size.

Note: since we're writing an UNDEF symbol, most GElf_Sym fields will
be 0 and we can repurpose one (st_size) to host the 0 for the xshndx
value.

Fixes: 2f2f7e47f052 ("objtool: Add elf_create_undef_symbol()")
Reported-by: Nick Desaulniers <ndesaulniers@google.com>
Suggested-by: Fangrui Song <maskray@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Link: https://lkml.kernel.org/r/YL3q1qFO9QIRL/BA@hirez.programming.kicks-ass.net
1 parent 614124b
History
Tip revision: 584fd3b31889852d0d6f3dd1e3d8e9619b660d2c authored by Peter Zijlstra on 07 June 2021, 09:45:58 UTC
objtool: Fix .symtab_shndx handling for elf_create_undef_symbol()
Tip revision: 584fd3b
File Mode Size
Documentation
LICENSES
arch
block
certs
crypto
drivers
fs
include
init
ipc
kernel
lib
mm
net
samples
scripts
security
sound
tools
usr
virt
.clang-format -rw-r--r-- 16.4 KB
.cocciconfig -rw-r--r-- 59 bytes
.get_maintainer.ignore -rw-r--r-- 71 bytes
.gitattributes -rw-r--r-- 62 bytes
.gitignore -rw-r--r-- 1.9 KB
.mailmap -rw-r--r-- 19.5 KB
COPYING -rw-r--r-- 496 bytes
CREDITS -rw-r--r-- 98.6 KB
Kbuild -rw-r--r-- 1.3 KB
Kconfig -rw-r--r-- 555 bytes
MAINTAINERS -rw-r--r-- 588.3 KB
Makefile -rw-r--r-- 64.3 KB
README -rw-r--r-- 727 bytes

README

back to top