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kpatch/kpatch-build/lookup.h

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merge add-patches-section functionality into create-obj-diff In preparation for dynamic symbol linking, the symbol lookup logic is going to move into create-diff-obj anyway. We might as well minimize the code duplication and pull this into create-diff-obj. This avoids having to re-parse the ELF file modify it in-place. Signed-off-by: Seth Jennings <sjenning@redhat.com> Conflicts: kpatch-build/kpatch-build
2014-05-14 20:43:58 +00:00
#ifndef _LOOKUP_H_
#define _LOOKUP_H_
lookup: convert lookup functions to return bool IMO, the code is easier to follow if these functions return bool. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
2019-11-01 19:59:05 +00:00
#include <stdbool.h>
Make lookup_symbol() accept struct symbol as an argument At the moment lookup_symbol() takes symbol name as an argument which might not be enough in some cases (e.g. for objectfiles built from multiple source files). Make it accept full symbol structure. Signed-off-by: Artem Savkov <asavkov@redhat.com>
2021-08-02 09:22:32 +00:00
#include "kpatch-elf.h"
lookup: convert lookup functions to return bool IMO, the code is easier to follow if these functions return bool. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
2019-11-01 19:59:05 +00:00
merge add-patches-section functionality into create-obj-diff In preparation for dynamic symbol linking, the symbol lookup logic is going to move into create-diff-obj anyway. We might as well minimize the code duplication and pull this into create-diff-obj. This avoids having to re-parse the ELF file modify it in-place. Signed-off-by: Seth Jennings <sjenning@redhat.com> Conflicts: kpatch-build/kpatch-build
2014-05-14 20:43:58 +00:00
struct lookup_table;
struct lookup_result {
lookup: add 'objname' to lookup table and lookup results This will be needed for the upcoming dynrela refactoring. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
2019-11-01 20:03:14 +00:00
char *objname;
lookup: rename 'value' -> 'addr' Rename 'value' to 'addr' to more accurately describe it. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
2018-04-18 18:39:56 +00:00
unsigned long addr;
merge add-patches-section functionality into create-obj-diff In preparation for dynamic symbol linking, the symbol lookup logic is going to move into create-diff-obj anyway. We might as well minimize the code duplication and pull this into create-diff-obj. This avoids having to re-parse the ELF file modify it in-place. Signed-off-by: Seth Jennings <sjenning@redhat.com> Conflicts: kpatch-build/kpatch-build
2014-05-14 20:43:58 +00:00
unsigned long size;
lookup: rename 'pos' to 'sympos' To more accurately describe its purpose. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
2018-04-18 18:41:24 +00:00
unsigned long sympos;
create-diff-object: refactor dynrela conversion The dynrela (aka .klp.rela) conversion logic is notoriously complex and fragile. Simplify it and improve the comments. This is mainly a cosmetic change. In theory it shouldn't change functionality or break anything. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
2018-03-22 20:22:10 +00:00
bool global, exported;
merge add-patches-section functionality into create-obj-diff In preparation for dynamic symbol linking, the symbol lookup logic is going to move into create-diff-obj anyway. We might as well minimize the code duplication and pull this into create-diff-obj. This avoids having to re-parse the ELF file modify it in-place. Signed-off-by: Seth Jennings <sjenning@redhat.com> Conflicts: kpatch-build/kpatch-build
2014-05-14 20:43:58 +00:00
};
lookup: add 'objname' to lookup table and lookup results This will be needed for the upcoming dynrela refactoring. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
2019-11-01 20:03:14 +00:00
struct lookup_table *lookup_open(char *symtab_path, char *objname,
Switch to per-file lookup table pointers. So far create-diff-object worked only with objectfiles built from a single source file. To support object-files built from multiple sources such as linked vmlinux.o, we call locals_match() for each of STT_FILE symbols and store the pointer to the beginning of appropriate symbol block in lookup table in each symbol. Signed-off-by: Artem Savkov <asavkov@redhat.com>
2021-08-02 09:32:23 +00:00
char *symvers_path, struct kpatch_elf *kelf);
merge add-patches-section functionality into create-obj-diff In preparation for dynamic symbol linking, the symbol lookup logic is going to move into create-diff-obj anyway. We might as well minimize the code duplication and pull this into create-diff-obj. This avoids having to re-parse the ELF file modify it in-place. Signed-off-by: Seth Jennings <sjenning@redhat.com> Conflicts: kpatch-build/kpatch-build
2014-05-14 20:43:58 +00:00
void lookup_close(struct lookup_table *table);
Make lookup_symbol() accept struct symbol as an argument At the moment lookup_symbol() takes symbol name as an argument which might not be enough in some cases (e.g. for objectfiles built from multiple source files). Make it accept full symbol structure. Signed-off-by: Artem Savkov <asavkov@redhat.com>
2021-08-02 09:22:32 +00:00
bool lookup_symbol(struct lookup_table *table, struct symbol *sym,
create-diff-object: refactor dynrela conversion The dynrela (aka .klp.rela) conversion logic is notoriously complex and fragile. Simplify it and improve the comments. This is mainly a cosmetic change. In theory it shouldn't change functionality or break anything. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
2018-03-22 20:22:10 +00:00
struct lookup_result *result);
merge add-patches-section functionality into create-obj-diff In preparation for dynamic symbol linking, the symbol lookup logic is going to move into create-diff-obj anyway. We might as well minimize the code duplication and pull this into create-diff-obj. This avoids having to re-parse the ELF file modify it in-place. Signed-off-by: Seth Jennings <sjenning@redhat.com> Conflicts: kpatch-build/kpatch-build
2014-05-14 20:43:58 +00:00
#endif /* _LOOKUP_H_ */