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authorDavid Howells <dhowells@redhat.com>2012-09-28 09:01:03 +0400
committerRusty Russell <rusty@rustcorp.com.au>2012-09-28 09:01:03 +0400
commit786d35d45cc40b2a51a18f73e14e135d47fdced7 (patch)
treedf18f4dc3f8a333267e74089760043769b3b6184 /include/linux/moduleloader.h
parent6ede81239e31cfacbb1e2d260530cd80d13cf0db (diff)
downloadlinux-786d35d45cc40b2a51a18f73e14e135d47fdced7.tar.xz
Make most arch asm/module.h files use asm-generic/module.h
Use the mapping of Elf_[SPE]hdr, Elf_Addr, Elf_Sym, Elf_Dyn, Elf_Rel/Rela, ELF_R_TYPE() and ELF_R_SYM() to either the 32-bit version or the 64-bit version into asm-generic/module.h for all arches bar MIPS. Also, use the generic definition mod_arch_specific where possible. To this end, I've defined three new config bools: (*) HAVE_MOD_ARCH_SPECIFIC Arches define this if they don't want to use the empty generic mod_arch_specific struct. (*) MODULES_USE_ELF_RELA Arches define this if their modules can contain RELA records. This causes the Elf_Rela mapping to be emitted and allows apply_relocate_add() to be defined by the arch rather than have the core emit an error message. (*) MODULES_USE_ELF_REL Arches define this if their modules can contain REL records. This causes the Elf_Rel mapping to be emitted and allows apply_relocate() to be defined by the arch rather than have the core emit an error message. Note that it is possible to allow both REL and RELA records: m68k and mips are two arches that do this. With this, some arch asm/module.h files can be deleted entirely and replaced with a generic-y marker in the arch Kbuild file. Additionally, I have removed the bits from m32r and score that handle the unsupported type of relocation record as that's now handled centrally. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'include/linux/moduleloader.h')
-rw-r--r--include/linux/moduleloader.h36
1 files changed, 32 insertions, 4 deletions
diff --git a/include/linux/moduleloader.h b/include/linux/moduleloader.h
index b2be02ebf453..560ca53a75fa 100644
--- a/include/linux/moduleloader.h
+++ b/include/linux/moduleloader.h
@@ -28,21 +28,49 @@ void *module_alloc(unsigned long size);
/* Free memory returned from module_alloc. */
void module_free(struct module *mod, void *module_region);
-/* Apply the given relocation to the (simplified) ELF. Return -error
- or 0. */
+/*
+ * Apply the given relocation to the (simplified) ELF. Return -error
+ * or 0.
+ */
+#ifdef CONFIG_MODULES_USE_ELF_REL
int apply_relocate(Elf_Shdr *sechdrs,
const char *strtab,
unsigned int symindex,
unsigned int relsec,
struct module *mod);
+#else
+static inline int apply_relocate(Elf_Shdr *sechdrs,
+ const char *strtab,
+ unsigned int symindex,
+ unsigned int relsec,
+ struct module *me)
+{
+ printk(KERN_ERR "module %s: REL relocation unsupported\n", me->name);
+ return -ENOEXEC;
+}
+#endif
-/* Apply the given add relocation to the (simplified) ELF. Return
- -error or 0 */
+/*
+ * Apply the given add relocation to the (simplified) ELF. Return
+ * -error or 0
+ */
+#ifdef CONFIG_MODULES_USE_ELF_RELA
int apply_relocate_add(Elf_Shdr *sechdrs,
const char *strtab,
unsigned int symindex,
unsigned int relsec,
struct module *mod);
+#else
+static inline int apply_relocate_add(Elf_Shdr *sechdrs,
+ const char *strtab,
+ unsigned int symindex,
+ unsigned int relsec,
+ struct module *me)
+{
+ printk(KERN_ERR "module %s: REL relocation unsupported\n", me->name);
+ return -ENOEXEC;
+}
+#endif
/* Any final processing of module before access. Return -error or 0. */
int module_finalize(const Elf_Ehdr *hdr,