Commit 786d35d4 authored by David Howells's avatar David Howells Committed by Rusty Russell
Browse files

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: default avatarDavid Howells <dhowells@redhat.com>
Acked-by: default avatarSam Ravnborg <sam@ravnborg.org>
Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
parent 6ede8123

arch/Kconfig

+19 −0
Original line number Diff line number Diff line
@@ -281,4 +281,23 @@ config SECCOMP_FILTER 


	  See Documentation/prctl/seccomp_filter.txt for details.



config HAVE_MOD_ARCH_SPECIFIC

	bool

	help

	  The arch uses struct mod_arch_specific to store data.  Many arches

	  just need a simple module loader without arch specific data - those

	  should not enable this.



config MODULES_USE_ELF_RELA

	bool

	help

	  Modules only use ELF RELA relocations.  Modules with ELF REL

	  relocations will give an error.



config MODULES_USE_ELF_REL

	bool

	help

	  Modules only use ELF REL relocations.  Modules with ELF RELA

	  relocations will give an error.



source "kernel/gcov/Kconfig"

arch/alpha/Kconfig

+2 −0
Original line number Diff line number Diff line
@@ -20,6 +20,8 @@ config ALPHA 
	select GENERIC_CMOS_UPDATE

	select GENERIC_STRNCPY_FROM_USER

	select GENERIC_STRNLEN_USER

	select HAVE_MOD_ARCH_SPECIFIC

	select MODULES_USE_ELF_RELA

	help

	  The Alpha is a 64-bit general-purpose processor designed and

	  marketed by the Digital Equipment Corporation of blessed memory,

arch/alpha/include/asm/module.h

+2 −8
Original line number Diff line number Diff line 
#ifndef _ALPHA_MODULE_H

#define _ALPHA_MODULE_H



#include <asm-generic/module.h>



struct mod_arch_specific

{

	unsigned int gotsecindex;

};



#define Elf_Sym Elf64_Sym

#define Elf_Shdr Elf64_Shdr

#define Elf_Ehdr Elf64_Ehdr

#define Elf_Phdr Elf64_Phdr

#define Elf_Dyn Elf64_Dyn

#define Elf_Rel Elf64_Rel

#define Elf_Rela Elf64_Rela



#define ARCH_SHF_SMALL SHF_ALPHA_GPREL



#ifdef MODULE

arch/arm/Kconfig

+2 −0
Original line number Diff line number Diff line
@@ -49,6 +49,8 @@ config ARM 
	select GENERIC_STRNCPY_FROM_USER

	select GENERIC_STRNLEN_USER

	select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN

	select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND

	select MODULES_USE_ELF_REL

	help

	  The ARM series is a line of low-power-consumption RISC chip designs

	  licensed by ARM Ltd and targeted at embedded applications and

arch/arm/include/asm/module.h

+2 −6
Original line number Diff line number Diff line 
#ifndef _ASM_ARM_MODULE_H

#define _ASM_ARM_MODULE_H



#define Elf_Shdr	Elf32_Shdr

#define Elf_Sym		Elf32_Sym

#define Elf_Ehdr	Elf32_Ehdr

#include <asm-generic/module.h>



struct unwind_table;
@@ -16,13 +14,11 @@ enum { 
	ARM_SEC_DEVEXIT,

	ARM_SEC_MAX,

};

#endif



struct mod_arch_specific {

#ifdef CONFIG_ARM_UNWIND

	struct unwind_table *unwind[ARM_SEC_MAX];

#endif

};

#endif



/*

 * Add the ARM architecture version to the version magic string

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