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@xxxxxxxxxxxxxxx>
---
v2: Use __weak function as suggested by Jessica
arch/arm/kernel/module.c | 7 +++++++
1 file changed, 7 insertions(+)
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)
--
2.17.1
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