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authorPeter Zijlstra <peterz@infradead.org>2021-03-26 16:12:08 +0100
committerIngo Molnar <mingo@kernel.org>2021-04-02 12:44:37 +0200
commitd0c5c4cc73da0b05b0d9e5f833f2d859e1b45f8e (patch)
treeb9f0b2e78272ec8b314572c802645a87138535fa /tools/objtool
parentef47cc01cb4abcd760d8ac66b9361d6ade4d0846 (diff)
objtool: Create reloc sections implicitly
Have elf_add_reloc() create the relocation section implicitly. Suggested-by: Josh Poimboeuf <jpoimboe@redhat.com> 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/20210326151259.880174448@infradead.org
Diffstat (limited to 'tools/objtool')
-rw-r--r--tools/objtool/check.c6
-rw-r--r--tools/objtool/elf.c9
-rw-r--r--tools/objtool/include/objtool/elf.h1
-rw-r--r--tools/objtool/orc_gen.c2
4 files changed, 8 insertions, 10 deletions
diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 61fe29ae4cd4..600fa67153d3 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -459,9 +459,6 @@ static int create_static_call_sections(struct objtool_file *file)
if (!sec)
return -1;
- if (!elf_create_reloc_section(file->elf, sec, SHT_RELA))
- return -1;
-
idx = 0;
list_for_each_entry(insn, &file->static_call_list, static_call_node) {
@@ -547,9 +544,6 @@ static int create_mcount_loc_sections(struct objtool_file *file)
if (!sec)
return -1;
- if (!elf_create_reloc_section(file->elf, sec, SHT_RELA))
- return -1;
-
idx = 0;
list_for_each_entry(insn, &file->mcount_loc_list, mcount_loc_node) {
diff --git a/tools/objtool/elf.c b/tools/objtool/elf.c
index 0ab52ac3f861..7b65ae3beea4 100644
--- a/tools/objtool/elf.c
+++ b/tools/objtool/elf.c
@@ -447,11 +447,18 @@ err:
return -1;
}
+static struct section *elf_create_reloc_section(struct elf *elf,
+ struct section *base,
+ int reltype);
+
int elf_add_reloc(struct elf *elf, struct section *sec, unsigned long offset,
unsigned int type, struct symbol *sym, int addend)
{
struct reloc *reloc;
+ if (!sec->reloc && !elf_create_reloc_section(elf, sec, SHT_RELA))
+ return -1;
+
reloc = malloc(sizeof(*reloc));
if (!reloc) {
perror("malloc");
@@ -829,7 +836,7 @@ static struct section *elf_create_rela_reloc_section(struct elf *elf, struct sec
return sec;
}
-struct section *elf_create_reloc_section(struct elf *elf,
+static struct section *elf_create_reloc_section(struct elf *elf,
struct section *base,
int reltype)
{
diff --git a/tools/objtool/include/objtool/elf.h b/tools/objtool/include/objtool/elf.h
index 825ad326201d..463f329f1c66 100644
--- a/tools/objtool/include/objtool/elf.h
+++ b/tools/objtool/include/objtool/elf.h
@@ -122,7 +122,6 @@ static inline u32 reloc_hash(struct reloc *reloc)
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_reloc_section(struct elf *elf, struct section *base, int reltype);
int elf_add_reloc(struct elf *elf, struct section *sec, unsigned long offset,
unsigned int type, struct symbol *sym, int addend);
diff --git a/tools/objtool/orc_gen.c b/tools/objtool/orc_gen.c
index 1b57be6508f4..dc9b7dd314b0 100644
--- a/tools/objtool/orc_gen.c
+++ b/tools/objtool/orc_gen.c
@@ -225,8 +225,6 @@ int orc_create(struct objtool_file *file)
sec = elf_create_section(file->elf, ".orc_unwind_ip", 0, sizeof(int), nr);
if (!sec)
return -1;
- if (!elf_create_reloc_section(file->elf, sec, SHT_RELA))
- return -1;
/* Write ORC entries to sections: */
list_for_each_entry(entry, &orc_list, list) {