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| author | Matthias Schiffer <matthias.schiffer@ew.tq-group.com> | 2019-06-07 12:49:12 +0200 |
|---|---|---|
| committer | Jessica Yu <jeyu@kernel.org> | 2019-06-24 14:05:10 +0200 |
| commit | 70bac08d4157fda334fe21ee38a2e93bc434bac4 (patch) | |
| tree | 33c91f336746cba92b4772e3c0a3803ed98efa07 /arch/arm/kernel | |
| parent | 38b37d631aec80da0c65ac03a7ef680b468c7857 (diff) | |
ARM: module: recognize unwind exit sections
In addition to the prefix ".exit", ".ARM.extab.exit" and ".ARM.exidx.exit"
must be recognized as exit sections as well. Otherwise, loading modules can
fail without CONFIG_MODULE_UNLOAD depending on the memory layout, when
relocations for the unwind sections refer to the .exit.text section:
imx_sdma: section 16 reloc 0 sym '': relocation 42 out of range
(0x7f015260 -> 0xc0f5a5e8)
where 0x7F000000 is the module load area and 0xC0000000 is the vmalloc
area. Relocation 42 refers to R_ARM_PREL31, which is limited to signed
31bit offsets.
Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
Diffstat (limited to 'arch/arm/kernel')
| -rw-r--r-- | arch/arm/kernel/module.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm/kernel/module.c b/arch/arm/kernel/module.c index 3ff571c2c71c..692001aabb0f 100644 --- a/arch/arm/kernel/module.c +++ b/arch/arm/kernel/module.c @@ -58,6 +58,13 @@ void *module_alloc(unsigned long size) } #endif +bool module_exit_section(const char *name) +{ + return strstarts(name, ".exit") || + strstarts(name, ".ARM.extab.exit") || + strstarts(name, ".ARM.exidx.exit"); +} + int apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex, unsigned int relindex, struct module *module) |