linux-kernel - [PATCH] modpost: define more R_ARM

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Date:   Wed, 28 Jun 2023 01:32:05 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     linux-kbuild@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Masahiro Yamada <masahiroy@...nel.org>,
        Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nicolas Schier <nicolas@...sle.eu>
Subject: [PATCH] modpost: define more R_ARM_* for old distributions

On CentOS 7, the following build error occurs.

scripts/mod/modpost.c: In function 'addend_arm_rel':
scripts/mod/modpost.c:1312:7: error: 'R_ARM_MOVW_ABS_NC' undeclared (first use in this function); did you mean 'R_ARM_THM_ABS5'?
  case R_ARM_MOVW_ABS_NC:
       ^~~~~~~~~~~~~~~~~
       R_ARM_THM_ABS5
scripts/mod/modpost.c:1312:7: note: each undeclared identifier is reported only once for each function it appears in
scripts/mod/modpost.c:1313:7: error: 'R_ARM_MOVT_ABS' undeclared (first use in this function); did you mean 'R_ARM_THM_ABS5'?
  case R_ARM_MOVT_ABS:
       ^~~~~~~~~~~~~~
       R_ARM_THM_ABS5
scripts/mod/modpost.c:1326:7: error: 'R_ARM_THM_MOVW_ABS_NC' undeclared (first use in this function); did you mean 'R_ARM_THM_ABS5'?
  case R_ARM_THM_MOVW_ABS_NC:
       ^~~~~~~~~~~~~~~~~~~~~
       R_ARM_THM_ABS5
scripts/mod/modpost.c:1327:7: error: 'R_ARM_THM_MOVT_ABS' undeclared (first use in this function); did you mean 'R_ARM_THM_ABS5'?
  case R_ARM_THM_MOVT_ABS:
       ^~~~~~~~~~~~~~~~~~
       R_ARM_THM_ABS5

Fixes: 12ca2c67d742 ("modpost: detect section mismatch for R_ARM_{MOVW_ABS_NC,MOVT_ABS}")
Fixes: cd1824fb7a37 ("modpost: detect section mismatch for R_ARM_THM_{MOVW_ABS_NC,MOVT_ABS}")
Reported-by: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
---

 scripts/mod/modpost.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 73f4f5588b67..603a4f9587a4 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -1286,6 +1286,23 @@ static int addend_386_rel(uint32_t *location, Elf_Rela *r)
 #ifndef	R_ARM_THM_JUMP24
 #define	R_ARM_THM_JUMP24	30
 #endif
+
+#ifndef R_ARM_MOVW_ABS_NC
+#define R_ARM_MOVW_ABS_NC	43
+#endif
+
+#ifndef R_ARM_MOVT_ABS
+#define R_ARM_MOVT_ABS		44
+#endif
+
+#ifndef R_ARM_THM_MOVW_ABS_NC
+#define R_ARM_THM_MOVW_ABS_NC	47
+#endif
+
+#ifndef R_ARM_THM_MOVT_ABS
+#define R_ARM_THM_MOVT_ABS	48
+#endif
+
 #ifndef	R_ARM_THM_JUMP19
 #define	R_ARM_THM_JUMP19	51
 #endif
-- 
2.39.2