linux-kernel - [tip: objtool/urgent] objtool: Fix objtool regression on x32 systems

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Date:   Thu, 19 May 2022 21:57:18 -0000
From:   "tip-bot2 for Mikulas Patocka" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Mikulas Patocka <mpatocka@...hat.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: objtool/urgent] objtool: Fix objtool regression on x32 systems

The following commit has been merged into the objtool/urgent branch of tip:

Commit-ID:     c1d2d643378ce89358f65caf9748a6f044086919
Gitweb:        https://git.kernel.org/tip/c1d2d643378ce89358f65caf9748a6f044086919
Author:        Mikulas Patocka <mpatocka@...hat.com>
AuthorDate:    Mon, 16 May 2022 11:06:36 -04:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Thu, 19 May 2022 23:46:12 +02:00

objtool: Fix objtool regression on x32 systems

Commit c087c6e7b551 ("objtool: Fix type of reloc::addend") failed to
appreciate cross building from ILP32 hosts, where 'int' == 'long' and
the issue persists.

As such, use s64/int64_t/Elf64_Sxword for this field and suffer the
pain that is ISO C99 printf formats for it.

Fixes: c087c6e7b551 ("objtool: Fix type of reloc::addend")
Signed-off-by: Mikulas Patocka <mpatocka@...hat.com>
[peterz: reword changelog, s/long long/s64/]
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Link: https://lkml.kernel.org/r/alpine.LRH.2.02.2205161041260.11556@file01.intranet.prod.int.rdu2.redhat.com
---
 tools/objtool/check.c               |  9 +++++----
 tools/objtool/elf.c                 |  2 +-
 tools/objtool/include/objtool/elf.h |  4 ++--
 3 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index ca5b746..8a0971a 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -5,6 +5,7 @@
 
 #include <string.h>
 #include <stdlib.h>
+#include <inttypes.h>
 #include <sys/mman.h>
 
 #include <arch/elf.h>
@@ -560,12 +561,12 @@ static int add_dead_ends(struct objtool_file *file)
 		else if (reloc->addend == reloc->sym->sec->sh.sh_size) {
 			insn = find_last_insn(file, reloc->sym->sec);
 			if (!insn) {
-				WARN("can't find unreachable insn at %s+0x%lx",
+				WARN("can't find unreachable insn at %s+0x%" PRIx64,
 				     reloc->sym->sec->name, reloc->addend);
 				return -1;
 			}
 		} else {
-			WARN("can't find unreachable insn at %s+0x%lx",
+			WARN("can't find unreachable insn at %s+0x%" PRIx64,
 			     reloc->sym->sec->name, reloc->addend);
 			return -1;
 		}
@@ -595,12 +596,12 @@ reachable:
 		else if (reloc->addend == reloc->sym->sec->sh.sh_size) {
 			insn = find_last_insn(file, reloc->sym->sec);
 			if (!insn) {
-				WARN("can't find reachable insn at %s+0x%lx",
+				WARN("can't find reachable insn at %s+0x%" PRIx64,
 				     reloc->sym->sec->name, reloc->addend);
 				return -1;
 			}
 		} else {
-			WARN("can't find reachable insn at %s+0x%lx",
+			WARN("can't find reachable insn at %s+0x%" PRIx64,
 			     reloc->sym->sec->name, reloc->addend);
 			return -1;
 		}
diff --git a/tools/objtool/elf.c b/tools/objtool/elf.c
index 22c2a07..e84cf15 100644
--- a/tools/objtool/elf.c
+++ b/tools/objtool/elf.c
@@ -547,7 +547,7 @@ static struct section *elf_create_reloc_section(struct elf *elf,
 						int reltype);
 
 int elf_add_reloc(struct elf *elf, struct section *sec, unsigned long offset,
-		  unsigned int type, struct symbol *sym, long addend)
+		  unsigned int type, struct symbol *sym, s64 addend)
 {
 	struct reloc *reloc;
 
diff --git a/tools/objtool/include/objtool/elf.h b/tools/objtool/include/objtool/elf.h
index 9b36802..82e57eb 100644
--- a/tools/objtool/include/objtool/elf.h
+++ b/tools/objtool/include/objtool/elf.h
@@ -73,7 +73,7 @@ struct reloc {
 	struct symbol *sym;
 	unsigned long offset;
 	unsigned int type;
-	long addend;
+	s64 addend;
 	int idx;
 	bool jump_table_start;
 };
@@ -135,7 +135,7 @@ 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);
 
 int elf_add_reloc(struct elf *elf, struct section *sec, unsigned long offset,
-		  unsigned int type, struct symbol *sym, long addend);
+		  unsigned int type, struct symbol *sym, s64 addend);
 int elf_add_reloc_to_insn(struct elf *elf, struct section *sec,
 			  unsigned long offset, unsigned int type,
 			  struct section *insn_sec, unsigned long insn_off);