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objtool: Add mark_sec_changed()

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Ensure elf->changed always gets set when sec->changed gets set.

Link: https://lore.kernel.org/r/9a810a8d2e28af6ba07325362d0eb4703bb09d3a.1685464332.git.jpoimboe@kernel.org
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
This commit is contained in:
Josh Poimboeuf 2023-05-30 10:20:58 -07:00
parent eb0481bbc4
commit ff4082730c
2 changed files with 29 additions and 16 deletions
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31
tools/objtool/elf.c
View File

@ -562,7 +562,8 @@ int elf_add_reloc(struct elf *elf, struct section *sec, unsigned long offset,
elf_hash_add(reloc, &reloc->hash, reloc_hash(reloc));
sec->rsec->sh.sh_size += sec->rsec->sh.sh_entsize;
sec->rsec->changed = true;
mark_sec_changed(elf, sec->rsec, true);
return 0;
}
@ -577,7 +578,7 @@ static void elf_dirty_reloc_sym(struct elf *elf, struct symbol *sym)
struct reloc *reloc;
list_for_each_entry(reloc, &sym->reloc_list, sym_reloc_entry)
reloc->sec->changed = true;
mark_sec_changed(elf, reloc->sec, true);
}
/*
@ -654,7 +655,7 @@ static int elf_update_symbol(struct elf *elf, struct section *symtab,
symtab_data->d_align = 1;
symtab_data->d_type = ELF_T_SYM;
symtab->changed = true;
mark_sec_changed(elf, symtab, true);
symtab->truncate = true;
if (t) {
@ -669,7 +670,7 @@ static int elf_update_symbol(struct elf *elf, struct section *symtab,
shndx_data->d_align = sizeof(Elf32_Word);
shndx_data->d_type = ELF_T_WORD;
symtab_shndx->changed = true;
mark_sec_changed(elf, symtab_shndx, true);
symtab_shndx->truncate = true;
}
@ -773,11 +774,11 @@ non_local:
}
symtab->sh.sh_size += symtab->sh.sh_entsize;
symtab->changed = true;
mark_sec_changed(elf, symtab, true);
if (symtab_shndx) {
symtab_shndx->sh.sh_size += sizeof(Elf32_Word);
symtab_shndx->changed = true;
mark_sec_changed(elf, symtab_shndx, true);
}
return sym;
@ -1040,7 +1041,8 @@ static int elf_add_string(struct elf *elf, struct section *strtab, char *str)
len = strtab->sh.sh_size;
strtab->sh.sh_size += data->d_size;
strtab->changed = true;
mark_sec_changed(elf, strtab, true);
return len;
}
@ -1075,7 +1077,6 @@ struct section *elf_create_section(struct elf *elf, const char *name,
}
sec->idx = elf_ndxscn(s);
sec->changed = true;
sec->data = elf_newdata(s);
if (!sec->data) {
@ -1122,7 +1123,7 @@ struct section *elf_create_section(struct elf *elf, const char *name,
elf_hash_add(section, &sec->hash, sec->idx);
elf_hash_add(section_name, &sec->name_hash, str_hash(sec->name));
elf->changed = true;
mark_sec_changed(elf, sec, true);
return sec;
}
@ -1208,9 +1209,8 @@ int elf_write_insn(struct elf *elf, struct section *sec,
}
memcpy(data->d_buf + offset, insn, len);
elf_flagdata(data, ELF_C_SET, ELF_F_DIRTY);
elf->changed = true;
mark_sec_changed(elf, sec, true);
return 0;
}
@ -1235,7 +1235,7 @@ int elf_write_reloc(struct elf *elf, struct reloc *reloc)
return -1;
}
elf->changed = true;
mark_sec_changed(elf, rsec, true);
return 0;
}
@ -1307,12 +1307,14 @@ int elf_write(struct elf *elf)
if (sec->truncate)
elf_truncate_section(elf, sec);
if (sec->changed) {
if (sec_changed(sec)) {
s = elf_getscn(elf->elf, sec->idx);
if (!s) {
WARN_ELF("elf_getscn");
return -1;
}
/* Note this also flags the section dirty */
if (!gelf_update_shdr(s, &sec->sh)) {
WARN_ELF("gelf_update_shdr");
return -1;
@ -1324,8 +1326,7 @@ int elf_write(struct elf *elf)
return -1;
}
sec->changed = false;
elf->changed = true;
mark_sec_changed(elf, sec, false);
}
}

14
tools/objtool/include/objtool/elf.h
View File

@ -39,7 +39,7 @@ struct section {
Elf_Data *data;
char *name;
int idx;
bool changed, text, rodata, noinstr, init, truncate;
bool _changed, text, rodata, noinstr, init, truncate;
struct reloc *reloc_data;
};
@ -164,6 +164,18 @@ static inline bool is_reloc_sec(struct section *sec)
return sec->sh.sh_type == SHT_RELA || sec->sh.sh_type == SHT_REL;
}
static inline bool sec_changed(struct section *sec)
{
return sec->_changed;
}
static inline void mark_sec_changed(struct elf *elf, struct section *sec,
bool changed)
{
sec->_changed = changed;
elf->changed |= changed;
}
#define for_each_sec(file, sec) \
list_for_each_entry(sec, &file->elf->sections, list)