Commit 2707579d authored by Josh Poimboeuf's avatar Josh Poimboeuf
Browse files

objtool: Remove flags argument from elf_create_section() 

Simplify the elf_create_section() interface a bit by removing the flags
argument.  Most callers don't care about changing the section header
flags.  If needed, they can be modified afterwards, just like any other
section header field.

Link: https://lore.kernel.org/r/515235d9cf62637a14bee37bfa9169ef20065471.1685464332.git.jpoimboe@kernel.org


Signed-off-by: default avatarJosh Poimboeuf <jpoimboe@kernel.org>
parent 809373e1

tools/objtool/check.c

+10 −7
Original line number Diff line number Diff line
@@ -677,11 +677,14 @@ static int create_static_call_sections(struct objtool_file *file) 
	list_for_each_entry(insn, &file->static_call_list, call_node)

		idx++;



	sec = elf_create_section(file->elf, ".static_call_sites", SHF_WRITE,

	sec = elf_create_section(file->elf, ".static_call_sites",

				 sizeof(struct static_call_site), idx);

	if (!sec)

		return -1;



	/* Allow modules to set the low bits of static_call_site::key */

	sec->sh.sh_flags |= SHF_WRITE;



	idx = 0;

	list_for_each_entry(insn, &file->static_call_list, call_node) {
@@ -763,7 +766,7 @@ static int create_retpoline_sites_sections(struct objtool_file *file) 
	if (!idx)

		return 0;



	sec = elf_create_section(file->elf, ".retpoline_sites", 0,

	sec = elf_create_section(file->elf, ".retpoline_sites",

				 sizeof(int), idx);

	if (!sec) {

		WARN("elf_create_section: .retpoline_sites");
@@ -809,7 +812,7 @@ static int create_return_sites_sections(struct objtool_file *file) 
	if (!idx)

		return 0;



	sec = elf_create_section(file->elf, ".return_sites", 0,

	sec = elf_create_section(file->elf, ".return_sites",

				 sizeof(int), idx);

	if (!sec) {

		WARN("elf_create_section: .return_sites");
@@ -861,7 +864,7 @@ static int create_ibt_endbr_seal_sections(struct objtool_file *file) 
	if (!idx)

		return 0;



	sec = elf_create_section(file->elf, ".ibt_endbr_seal", 0,

	sec = elf_create_section(file->elf, ".ibt_endbr_seal",

				 sizeof(int), idx);

	if (!sec) {

		WARN("elf_create_section: .ibt_endbr_seal");
@@ -920,7 +923,7 @@ static int create_cfi_sections(struct objtool_file *file) 
		idx++;

	}



	sec = elf_create_section(file->elf, ".cfi_sites", 0, sizeof(unsigned int), idx);

	sec = elf_create_section(file->elf, ".cfi_sites", sizeof(unsigned int), idx);

	if (!sec)

		return -1;
@@ -968,7 +971,7 @@ static int create_mcount_loc_sections(struct objtool_file *file) 
	list_for_each_entry(insn, &file->mcount_loc_list, call_node)

		idx++;



	sec = elf_create_section(file->elf, "__mcount_loc", 0, addrsize, idx);

	sec = elf_create_section(file->elf, "__mcount_loc", addrsize, idx);

	if (!sec)

		return -1;
@@ -1013,7 +1016,7 @@ static int create_direct_call_sections(struct objtool_file *file) 
	list_for_each_entry(insn, &file->call_list, call_node)

		idx++;



	sec = elf_create_section(file->elf, ".call_sites", 0, sizeof(unsigned int), idx);

	sec = elf_create_section(file->elf, ".call_sites", sizeof(unsigned int), idx);

	if (!sec)

		return -1;

tools/objtool/elf.c

+5 −5
Original line number Diff line number Diff line
@@ -1059,7 +1059,7 @@ static int elf_add_string(struct elf *elf, struct section *strtab, char *str) 
}



struct section *elf_create_section(struct elf *elf, const char *name,

				   unsigned int sh_flags, size_t entsize, int nr)

				   size_t entsize, int nr)

{

	struct section *sec, *shstrtab;

	size_t size = entsize * nr;
@@ -1117,7 +1117,7 @@ struct section *elf_create_section(struct elf *elf, const char *name, 
	sec->sh.sh_entsize = entsize;

	sec->sh.sh_type = SHT_PROGBITS;

	sec->sh.sh_addralign = 1;

	sec->sh.sh_flags = SHF_ALLOC | sh_flags;

	sec->sh.sh_flags = SHF_ALLOC;



	/* Add section name to .shstrtab (or .strtab for Clang) */

	shstrtab = find_section_by_name(elf, ".shstrtab");
@@ -1153,7 +1153,7 @@ static struct section *elf_create_rel_reloc_section(struct elf *elf, struct sect 
	strcpy(relocname, ".rel");

	strcat(relocname, base->name);



	sec = elf_create_section(elf, relocname, 0, sizeof(GElf_Rel), 0);

	sec = elf_create_section(elf, relocname, sizeof(GElf_Rel), 0);

	free(relocname);

	if (!sec)

		return NULL;
@@ -1185,9 +1185,9 @@ static struct section *elf_create_rela_reloc_section(struct elf *elf, struct sec 
	strcat(relocname, base->name);



	if (addrsize == sizeof(u32))

		sec = elf_create_section(elf, relocname, 0, sizeof(Elf32_Rela), 0);

		sec = elf_create_section(elf, relocname, sizeof(Elf32_Rela), 0);

	else

		sec = elf_create_section(elf, relocname, 0, sizeof(GElf_Rela), 0);

		sec = elf_create_section(elf, relocname, sizeof(GElf_Rela), 0);

	free(relocname);

	if (!sec)

		return NULL;

tools/objtool/include/objtool/elf.h

+1 −1
Original line number Diff line number Diff line
@@ -109,7 +109,7 @@ struct elf { 
};



struct elf *elf_open_read(const char *name, int flags);

struct section *elf_create_section(struct elf *elf, const char *name, unsigned int sh_flags, size_t entsize, int nr);

struct section *elf_create_section(struct elf *elf, const char *name, size_t entsize, int nr);



struct symbol *elf_create_prefix_symbol(struct elf *elf, struct symbol *orig, long size);

tools/objtool/orc_gen.c

+2 −2
Original line number Diff line number Diff line
@@ -237,12 +237,12 @@ int orc_create(struct objtool_file *file) 
		WARN("file already has .orc_unwind section, skipping");

		return -1;

	}

	orc_sec = elf_create_section(file->elf, ".orc_unwind", 0,

	orc_sec = elf_create_section(file->elf, ".orc_unwind",

				     sizeof(struct orc_entry), nr);

	if (!orc_sec)

		return -1;



	sec = elf_create_section(file->elf, ".orc_unwind_ip", 0, sizeof(int), nr);

	sec = elf_create_section(file->elf, ".orc_unwind_ip", sizeof(int), nr);

	if (!sec)

		return -1;