forked from mirrors/linux
786d35d45c
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>
83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
#ifndef _LINUX_MODULELOADER_H
|
|
#define _LINUX_MODULELOADER_H
|
|
/* The stuff needed for archs to support modules. */
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/elf.h>
|
|
|
|
/* These may be implemented by architectures that need to hook into the
|
|
* module loader code. Architectures that don't need to do anything special
|
|
* can just rely on the 'weak' default hooks defined in kernel/module.c.
|
|
* Note, however, that at least one of apply_relocate or apply_relocate_add
|
|
* must be implemented by each architecture.
|
|
*/
|
|
|
|
/* Adjust arch-specific sections. Return 0 on success. */
|
|
int module_frob_arch_sections(Elf_Ehdr *hdr,
|
|
Elf_Shdr *sechdrs,
|
|
char *secstrings,
|
|
struct module *mod);
|
|
|
|
/* Additional bytes needed by arch in front of individual sections */
|
|
unsigned int arch_mod_section_prepend(struct module *mod, unsigned int section);
|
|
|
|
/* Allocator used for allocating struct module, core sections and init
|
|
sections. Returns NULL on failure. */
|
|
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.
|
|
*/
|
|
#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
|
|
*/
|
|
#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,
|
|
const Elf_Shdr *sechdrs,
|
|
struct module *mod);
|
|
|
|
/* Any cleanup needed when module leaves. */
|
|
void module_arch_cleanup(struct module *mod);
|
|
|
|
#endif
|