diff options
author | Peter Zijlstra <peterz@infradead.org> | 2021-03-26 18:12:10 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-07-25 12:26:16 +0300 |
commit | b69e1b4b689faa1af25a0a76cd1ef8c612770608 (patch) | |
tree | 448bc6c66bf0bdd936b8e686fbe13f6caa996b04 /tools/objtool | |
parent | da962cd0a2fe2e2c29c75f425fb29fc09b4233cc (diff) | |
download | linux-b69e1b4b689faa1af25a0a76cd1ef8c612770608.tar.xz |
objtool: Extract elf_symbol_add()
commit 9a7827b7789c630c1efdb121daa42c6e77dce97f upstream.
Create a common helper to add symbols.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Link: https://lkml.kernel.org/r/20210326151300.003468981@infradead.org
[bwh: Backported to 5.10: rb_add() parameter order is different]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/objtool')
-rw-r--r-- | tools/objtool/elf.c | 56 |
1 files changed, 31 insertions, 25 deletions
diff --git a/tools/objtool/elf.c b/tools/objtool/elf.c index 07805b13abe0..74f4b3bb7961 100644 --- a/tools/objtool/elf.c +++ b/tools/objtool/elf.c @@ -341,12 +341,39 @@ static int read_sections(struct elf *elf) return 0; } +static void elf_add_symbol(struct elf *elf, struct symbol *sym) +{ + struct list_head *entry; + struct rb_node *pnode; + + sym->type = GELF_ST_TYPE(sym->sym.st_info); + sym->bind = GELF_ST_BIND(sym->sym.st_info); + + sym->offset = sym->sym.st_value; + sym->len = sym->sym.st_size; + + rb_add(&sym->sec->symbol_tree, &sym->node, symbol_to_offset); + pnode = rb_prev(&sym->node); + if (pnode) + entry = &rb_entry(pnode, struct symbol, node)->list; + else + entry = &sym->sec->symbol_list; + list_add(&sym->list, entry); + elf_hash_add(elf->symbol_hash, &sym->hash, sym->idx); + elf_hash_add(elf->symbol_name_hash, &sym->name_hash, str_hash(sym->name)); + + /* + * Don't store empty STT_NOTYPE symbols in the rbtree. They + * can exist within a function, confusing the sorting. + */ + if (!sym->len) + rb_erase(&sym->node, &sym->sec->symbol_tree); +} + static int read_symbols(struct elf *elf) { struct section *symtab, *symtab_shndx, *sec; struct symbol *sym, *pfunc; - struct list_head *entry; - struct rb_node *pnode; int symbols_nr, i; char *coldstr; Elf_Data *shndx_data = NULL; @@ -391,9 +418,6 @@ static int read_symbols(struct elf *elf) goto err; } - sym->type = GELF_ST_TYPE(sym->sym.st_info); - sym->bind = GELF_ST_BIND(sym->sym.st_info); - if ((sym->sym.st_shndx > SHN_UNDEF && sym->sym.st_shndx < SHN_LORESERVE) || (shndx_data && sym->sym.st_shndx == SHN_XINDEX)) { @@ -406,32 +430,14 @@ static int read_symbols(struct elf *elf) sym->name); goto err; } - if (sym->type == STT_SECTION) { + if (GELF_ST_TYPE(sym->sym.st_info) == STT_SECTION) { sym->name = sym->sec->name; sym->sec->sym = sym; } } else sym->sec = find_section_by_index(elf, 0); - sym->offset = sym->sym.st_value; - sym->len = sym->sym.st_size; - - rb_add(&sym->sec->symbol_tree, &sym->node, symbol_to_offset); - pnode = rb_prev(&sym->node); - if (pnode) - entry = &rb_entry(pnode, struct symbol, node)->list; - else - entry = &sym->sec->symbol_list; - list_add(&sym->list, entry); - elf_hash_add(elf->symbol_hash, &sym->hash, sym->idx); - elf_hash_add(elf->symbol_name_hash, &sym->name_hash, str_hash(sym->name)); - - /* - * Don't store empty STT_NOTYPE symbols in the rbtree. They - * can exist within a function, confusing the sorting. - */ - if (!sym->len) - rb_erase(&sym->node, &sym->sec->symbol_tree); + elf_add_symbol(elf, sym); } if (stats) |