[PATCH -next] objtool: use arch_jump_destination in read_intra_function_calls

[PATCH -next] objtool: use arch_jump_destination in read_intra_function_calls

[Chen Zhongjin]

arch_jump_destination() is used instead of offset + len + immediate
for jump destination.
But in read_intra_function_calls it didn't get changed.
It can make trouble for other arches development such as arm or ppc.
Fix it.

Signed-off-by: Chen Zhongjin <chenzhongjin@huawei.com>
---
 tools/objtool/check.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 0cec74da7ffe..b012d987a658 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -2233,7 +2233,7 @@ static int read_intra_function_calls(struct objtool_file *file)
 		 */
 		insn->type = INSN_JUMP_UNCONDITIONAL;
 
-		dest_off = insn->offset + insn->len + insn->immediate;
+		dest_off = arch_jump_destination(insn);
 		insn->jump_dest = find_insn(file, insn->sec, dest_off);
 		if (!insn->jump_dest) {
 			WARN_FUNC("can't find call dest at %s+0x%lx",
-- 
2.17.1

Fwd: [PATCH -next] objtool: use arch_jump_destination in read_intra_function_calls

[Chen Zhongjin]

Sorry that forgot to CC ppc.

Maybe this is related to your intra-function call warnings problem?
Just a guess.

-------- Forwarded Message --------
Subject: 	[PATCH -next] objtool: use arch_jump_destination in 
read_intra_function_calls
Date: 	Thu, 18 Aug 2022 09:45:53 +0800
From: 	Chen Zhongjin <chenzhongjin@huawei.com>
To: 	linux-kernel@vger.kernel.org
CC: 	jpoimboe@kernel.org, peterz@infradead.org, chenzhongjin@huawei.com



arch_jump_destination() is used instead of offset + len + immediate
for jump destination.
But in read_intra_function_calls it didn't get changed.
It can make trouble for other arches development such as arm or ppc.
Fix it.

Signed-off-by: Chen Zhongjin <chenzhongjin@huawei.com>
---
tools/objtool/check.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 0cec74da7ffe..b012d987a658 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -2233,7 +2233,7 @@ static int read_intra_function_calls(struct 
objtool_file *file)
*/
insn->type = INSN_JUMP_UNCONDITIONAL;
- dest_off = insn->offset + insn->len + insn->immediate;
+ dest_off = arch_jump_destination(insn);
insn->jump_dest = find_insn(file, insn->sec, dest_off);
if (!insn->jump_dest) {
WARN_FUNC("can't find call dest at %s+0x%lx",

-- 
2.17.1

[tip: objtool/core] objtool: Use arch_jump_destination() in read_intra_function_calls()

[tip-bot2 for Chen Zhongjin]

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

Commit-ID:     7b3e31869081771c63c3d006347ad06738f843b5
Gitweb:        https://git.kernel.org/tip/7b3e31869081771c63c3d006347ad06738f843b5
Author:        Chen Zhongjin <chenzhongjin@huawei.com>
AuthorDate:    Thu, 18 Aug 2022 09:45:53 +08:00
Committer:     Peter Zijlstra <peterz@infradead.org>
CommitterDate: Fri, 19 Aug 2022 19:47:56 +02:00

objtool: Use arch_jump_destination() in read_intra_function_calls()

Use arch_jump_destiation() instead of the open-coded 'offset + len +
immediate' that is x86 specific.

Avoids future trouble with other architectures.

Signed-off-by: Chen Zhongjin <chenzhongjin@huawei.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20220818014553.220261-1-chenzhongjin@huawei.com
---
 tools/objtool/check.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 0cec74d..b012d98 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -2233,7 +2233,7 @@ static int read_intra_function_calls(struct objtool_file *file)
 		 */
 		insn->type = INSN_JUMP_UNCONDITIONAL;
 
-		dest_off = insn->offset + insn->len + insn->immediate;
+		dest_off = arch_jump_destination(insn);
 		insn->jump_dest = find_insn(file, insn->sec, dest_off);
 		if (!insn->jump_dest) {
 			WARN_FUNC("can't find call dest at %s+0x%lx",