forked from mirrors/linux
0fea6e9af8
Some #ifdef CONFIG_KASAN checks are only relevant for software KASAN modes (either related to shadow memory or compiler instrumentation). Expand those into CONFIG_KASAN_GENERIC || CONFIG_KASAN_SW_TAGS. Link: https://lkml.kernel.org/r/e6971e432dbd72bb897ff14134ebb7e169bdcf0c.1606161801.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <andreyknvl@google.com> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Reviewed-by: Alexander Potapenko <glider@google.com> Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Branislav Rankov <Branislav.Rankov@arm.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Evgenii Stepanov <eugenis@google.com> Cc: Kevin Brodsky <kevin.brodsky@arm.com> Cc: Marco Elver <elver@google.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
107 lines
3.1 KiB
C
107 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_MODULELOADER_H
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#define _LINUX_MODULELOADER_H
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/* The stuff needed for archs to support modules. */
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#include <linux/module.h>
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#include <linux/elf.h>
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/* These may be implemented by architectures that need to hook into the
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* module loader code. Architectures that don't need to do anything special
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* can just rely on the 'weak' default hooks defined in kernel/module.c.
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* Note, however, that at least one of apply_relocate or apply_relocate_add
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* must be implemented by each architecture.
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*/
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/* Adjust arch-specific sections. Return 0 on success. */
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int module_frob_arch_sections(Elf_Ehdr *hdr,
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Elf_Shdr *sechdrs,
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char *secstrings,
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struct module *mod);
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/* Additional bytes needed by arch in front of individual sections */
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unsigned int arch_mod_section_prepend(struct module *mod, unsigned int section);
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/* Allocator used for allocating struct module, core sections and init
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sections. Returns NULL on failure. */
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void *module_alloc(unsigned long size);
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/* Free memory returned from module_alloc. */
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void module_memfree(void *module_region);
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/* Determines if the section name is an init section (that is only used during
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* module loading).
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*/
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bool module_init_section(const char *name);
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/* Determines if the section name is an exit section (that is only used during
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* module unloading)
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*/
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bool module_exit_section(const char *name);
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/*
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* Apply the given relocation to the (simplified) ELF. Return -error
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* or 0.
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*/
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#ifdef CONFIG_MODULES_USE_ELF_REL
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int apply_relocate(Elf_Shdr *sechdrs,
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const char *strtab,
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unsigned int symindex,
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unsigned int relsec,
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struct module *mod);
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#else
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static inline int apply_relocate(Elf_Shdr *sechdrs,
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const char *strtab,
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unsigned int symindex,
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unsigned int relsec,
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struct module *me)
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{
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printk(KERN_ERR "module %s: REL relocation unsupported\n",
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module_name(me));
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return -ENOEXEC;
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}
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#endif
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/*
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* Apply the given add relocation to the (simplified) ELF. Return
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* -error or 0
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*/
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#ifdef CONFIG_MODULES_USE_ELF_RELA
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int apply_relocate_add(Elf_Shdr *sechdrs,
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const char *strtab,
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unsigned int symindex,
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unsigned int relsec,
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struct module *mod);
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#else
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static inline int apply_relocate_add(Elf_Shdr *sechdrs,
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const char *strtab,
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unsigned int symindex,
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unsigned int relsec,
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struct module *me)
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{
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printk(KERN_ERR "module %s: REL relocation unsupported\n",
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module_name(me));
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return -ENOEXEC;
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}
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#endif
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/* Any final processing of module before access. Return -error or 0. */
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int module_finalize(const Elf_Ehdr *hdr,
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const Elf_Shdr *sechdrs,
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struct module *mod);
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/* Any cleanup needed when module leaves. */
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void module_arch_cleanup(struct module *mod);
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/* Any cleanup before freeing mod->module_init */
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void module_arch_freeing_init(struct module *mod);
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#if (defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)) && \
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!defined(CONFIG_KASAN_VMALLOC)
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#include <linux/kasan.h>
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#define MODULE_ALIGN (PAGE_SIZE << KASAN_SHADOW_SCALE_SHIFT)
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#else
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#define MODULE_ALIGN PAGE_SIZE
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#endif
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#endif
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