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Message-ID: <6575e76e737521d3ff352dc9867613f33abd3116.1758067943.git.jpoimboe@kernel.org>
Date: Wed, 17 Sep 2025 09:03:52 -0700
From: Josh Poimboeuf <jpoimboe@...nel.org>
To: x86@...nel.org
Cc: linux-kernel@...r.kernel.org,
Petr Mladek <pmladek@...e.com>,
Miroslav Benes <mbenes@...e.cz>,
Joe Lawrence <joe.lawrence@...hat.com>,
live-patching@...r.kernel.org,
Song Liu <song@...nel.org>,
laokz <laokz@...mail.com>,
Jiri Kosina <jikos@...nel.org>,
Marcos Paulo de Souza <mpdesouza@...e.com>,
Weinan Liu <wnliu@...gle.com>,
Fazla Mehrab <a.mehrab@...edance.com>,
Chen Zhongjin <chenzhongjin@...wei.com>,
Puranjay Mohan <puranjay@...nel.org>,
Dylan Hatch <dylanbhatch@...gle.com>,
Peter Zijlstra <peterz@...radead.org>
Subject: [PATCH v4 44/63] objtool: Add annotype() helper
... for reading annotation types.
Signed-off-by: Josh Poimboeuf <jpoimboe@...nel.org>
---
tools/objtool/arch/loongarch/orc.c | 1 -
tools/objtool/arch/powerpc/decode.c | 1 -
tools/objtool/arch/x86/decode.c | 1 -
tools/objtool/arch/x86/orc.c | 1 -
tools/objtool/check.c | 5 +----
tools/objtool/include/objtool/elf.h | 13 +++++++++++++
tools/objtool/include/objtool/endianness.h | 9 ++++-----
tools/objtool/orc_dump.c | 1 -
tools/objtool/orc_gen.c | 1 -
tools/objtool/special.c | 1 -
10 files changed, 18 insertions(+), 16 deletions(-)
diff --git a/tools/objtool/arch/loongarch/orc.c b/tools/objtool/arch/loongarch/orc.c
index b58c5ff443c92..ffd3a3c858ae7 100644
--- a/tools/objtool/arch/loongarch/orc.c
+++ b/tools/objtool/arch/loongarch/orc.c
@@ -5,7 +5,6 @@
#include <objtool/check.h>
#include <objtool/orc.h>
#include <objtool/warn.h>
-#include <objtool/endianness.h>
int init_orc_entry(struct orc_entry *orc, struct cfi_state *cfi, struct instruction *insn)
{
diff --git a/tools/objtool/arch/powerpc/decode.c b/tools/objtool/arch/powerpc/decode.c
index d4cb02120a6bd..3a9b748216edc 100644
--- a/tools/objtool/arch/powerpc/decode.c
+++ b/tools/objtool/arch/powerpc/decode.c
@@ -7,7 +7,6 @@
#include <objtool/arch.h>
#include <objtool/warn.h>
#include <objtool/builtin.h>
-#include <objtool/endianness.h>
int arch_ftrace_match(const char *name)
{
diff --git a/tools/objtool/arch/x86/decode.c b/tools/objtool/arch/x86/decode.c
index 6bb46d9981533..b2c320f701f94 100644
--- a/tools/objtool/arch/x86/decode.c
+++ b/tools/objtool/arch/x86/decode.c
@@ -19,7 +19,6 @@
#include <objtool/elf.h>
#include <objtool/arch.h>
#include <objtool/warn.h>
-#include <objtool/endianness.h>
#include <objtool/builtin.h>
#include <arch/elf.h>
diff --git a/tools/objtool/arch/x86/orc.c b/tools/objtool/arch/x86/orc.c
index 7176b9ec5b058..735e150ca6b73 100644
--- a/tools/objtool/arch/x86/orc.c
+++ b/tools/objtool/arch/x86/orc.c
@@ -5,7 +5,6 @@
#include <objtool/check.h>
#include <objtool/orc.h>
#include <objtool/warn.h>
-#include <objtool/endianness.h>
int init_orc_entry(struct orc_entry *orc, struct cfi_state *cfi, struct instruction *insn)
{
diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 6d21b83b9377a..969a61766f4a6 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -14,7 +14,6 @@
#include <objtool/check.h>
#include <objtool/special.h>
#include <objtool/warn.h>
-#include <objtool/endianness.h>
#include <linux/objtool_types.h>
#include <linux/hashtable.h>
@@ -2273,9 +2272,7 @@ static int read_annotate(struct objtool_file *file,
}
for_each_reloc(sec->rsec, reloc) {
- type = *(u32 *)(sec->data->d_buf + (reloc_idx(reloc) * sec->sh.sh_entsize) + 4);
- type = bswap_if_needed(file->elf, type);
-
+ type = annotype(file->elf, sec, reloc);
offset = reloc->sym->offset + reloc_addend(reloc);
insn = find_insn(file, reloc->sym->sec, offset);
diff --git a/tools/objtool/include/objtool/elf.h b/tools/objtool/include/objtool/elf.h
index 9f135c262659e..814cfc0bbf16b 100644
--- a/tools/objtool/include/objtool/elf.h
+++ b/tools/objtool/include/objtool/elf.h
@@ -13,10 +13,14 @@
#include <linux/hashtable.h>
#include <linux/rbtree.h>
#include <linux/jhash.h>
+
+#include <objtool/endianness.h>
#include <arch/elf.h>
#define SYM_NAME_LEN 512
+#define bswap_if_needed(elf, val) __bswap_if_needed(&elf->ehdr, val)
+
#ifdef LIBELF_USE_DEPRECATED
# define elf_getshdrnum elf_getshnum
# define elf_getshdrstrndx elf_getshstrndx
@@ -401,6 +405,15 @@ static inline void set_reloc_type(struct elf *elf, struct reloc *reloc, unsigned
mark_sec_changed(elf, reloc->sec, true);
}
+static inline unsigned int annotype(struct elf *elf, struct section *sec,
+ struct reloc *reloc)
+{
+ unsigned int type;
+
+ type = *(u32 *)(sec->data->d_buf + (reloc_idx(reloc) * 8) + 4);
+ return bswap_if_needed(elf, type);
+}
+
#define RELOC_JUMP_TABLE_BIT 1UL
/* Does reloc mark the beginning of a jump table? */
diff --git a/tools/objtool/include/objtool/endianness.h b/tools/objtool/include/objtool/endianness.h
index 4d2aa9b0fe2fd..aebcd23386685 100644
--- a/tools/objtool/include/objtool/endianness.h
+++ b/tools/objtool/include/objtool/endianness.h
@@ -4,7 +4,6 @@
#include <linux/kernel.h>
#include <endian.h>
-#include <objtool/elf.h>
/*
* Does a byte swap if target file endianness doesn't match the host, i.e. cross
@@ -12,16 +11,16 @@
* To be used for multi-byte values conversion, which are read from / about
* to be written to a target native endianness ELF file.
*/
-static inline bool need_bswap(struct elf *elf)
+static inline bool need_bswap(GElf_Ehdr *ehdr)
{
return (__BYTE_ORDER == __LITTLE_ENDIAN) ^
- (elf->ehdr.e_ident[EI_DATA] == ELFDATA2LSB);
+ (ehdr->e_ident[EI_DATA] == ELFDATA2LSB);
}
-#define bswap_if_needed(elf, val) \
+#define __bswap_if_needed(ehdr, val) \
({ \
__typeof__(val) __ret; \
- bool __need_bswap = need_bswap(elf); \
+ bool __need_bswap = need_bswap(ehdr); \
switch (sizeof(val)) { \
case 8: \
__ret = __need_bswap ? bswap_64(val) : (val); break; \
diff --git a/tools/objtool/orc_dump.c b/tools/objtool/orc_dump.c
index 1dd9fc18fe624..5a979f52425ab 100644
--- a/tools/objtool/orc_dump.c
+++ b/tools/objtool/orc_dump.c
@@ -8,7 +8,6 @@
#include <objtool/objtool.h>
#include <objtool/orc.h>
#include <objtool/warn.h>
-#include <objtool/endianness.h>
int orc_dump(const char *filename)
{
diff --git a/tools/objtool/orc_gen.c b/tools/objtool/orc_gen.c
index 9d380abc2ed35..1045e1380ffde 100644
--- a/tools/objtool/orc_gen.c
+++ b/tools/objtool/orc_gen.c
@@ -12,7 +12,6 @@
#include <objtool/check.h>
#include <objtool/orc.h>
#include <objtool/warn.h>
-#include <objtool/endianness.h>
struct orc_list_entry {
struct list_head list;
diff --git a/tools/objtool/special.c b/tools/objtool/special.c
index fc2cf8dba1c03..e262af9171436 100644
--- a/tools/objtool/special.c
+++ b/tools/objtool/special.c
@@ -15,7 +15,6 @@
#include <objtool/builtin.h>
#include <objtool/special.h>
#include <objtool/warn.h>
-#include <objtool/endianness.h>
struct special_entry {
const char *sec;
--
2.50.0
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