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authorMatthias Schiffer <matthias.schiffer@ew.tq-group.com>2019-06-07 13:49:12 +0300
committerJessica Yu <jeyu@kernel.org>2019-06-24 15:05:10 +0300
commit70bac08d4157fda334fe21ee38a2e93bc434bac4 (patch)
tree33c91f336746cba92b4772e3c0a3803ed98efa07 /arch/arm/kernel/module.c
parent38b37d631aec80da0c65ac03a7ef680b468c7857 (diff)
downloadlinux-70bac08d4157fda334fe21ee38a2e93bc434bac4.tar.xz
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/module.c')
-rw-r--r--arch/arm/kernel/module.c7
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)