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/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _OBJTOOL_KLP_H
#define _OBJTOOL_KLP_H
#define SHF_RELA_LIVEPATCH 0x00100000
#define SHN_LIVEPATCH 0xff20
/*
* .init.klp_objects and .init.klp_funcs are created by klp diff and used by the
* patch module init code to build the klp_patch, klp_object and klp_func
* structs needed by the livepatch API.
*/
#define KLP_OBJECTS_SEC ".init.klp_objects"
#define KLP_FUNCS_SEC ".init.klp_funcs"
/*
* __klp_relocs.<objname> are intermediate sections which are created by klp
* diff and converted into KLP symbols/relas by "objtool klp post-link". This
* is needed to work around the linker, which doesn't preserve SHN_LIVEPATCH or
* SHF_RELA_LIVEPATCH, nor does it support having two RELA sections for a
* single PROGBITS section.
*
* "objname" is the object whose loading gates the relocation: "vmlinux" for
* references to vmlinux symbols, otherwise the name of the module being
* patched. post-link uses it to name the resulting
* .klp.rela.objname.section_name sections.
*/
#define KLP_RELOCS_SEC "__klp_relocs"
#define KLP_STRINGS_SEC ".rodata.klp.str1.1"
#define KLP_TOMBSTONE_PREFIX ".klp.tombstone."
struct klp_reloc {
void *offset;
void *sym;
u32 type;
};
/*
* .klp.symid is used to correlate symbols between vmlinux.o and vmlinux, for
* calculating sympos to disambiguate duplicately-named symbols.
*/
#define KLP_SYMID_SEC ".klp.symid"
struct klp_symid {
u64 id;
u64 addr;
};
struct objtool_file;
struct elf;
struct symbol;
int klp_create_symid_sections(struct objtool_file *file);
int klp_sympos_init(struct elf *orig);
unsigned long klp_find_sympos(struct elf *elf, struct symbol *sym);
int cmd_klp_checksum(int argc, const char **argv);
int cmd_klp_diff(int argc, const char **argv);
int cmd_klp_post_link(int argc, const char **argv);
#endif /* _OBJTOOL_KLP_H */
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