linux-kernel - [PATCH] Detect section mismatches in thumb relocations

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Date:	Fri, 31 Jan 2014 13:33:13 -0500
From:	David Long <dave.long@...aro.org>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	Rusty Russell <rusty@...tcorp.com.au>,
	James Hogan <james.hogan@...tec.com>,
	Andi Kleen <ak@...ux.intel.com>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] Detect section mismatches in thumb relocations

From: "David A. Long" <dave.long@...aro.org>

Add processing for normally encountered thumb relocation types so that
section mismatches will be detected.

Signed-off-by: David A. Long <dave.long@...aro.org>
---
 scripts/mod/modpost.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 1785576..9e6c996 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -1498,6 +1498,16 @@ static int addend_386_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r)
 #define R_ARM_JUMP24	29
 #endif
 
+#ifndef	R_ARM_THM_CALL
+#define	R_ARM_THM_CALL		10
+#endif
+#ifndef	R_ARM_THM_JUMP24
+#define	R_ARM_THM_JUMP24	30
+#endif
+#ifndef	R_ARM_THM_JUMP19
+#define	R_ARM_THM_JUMP19	51
+#endif
+
 static int addend_arm_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r)
 {
 	unsigned int r_typ = ELF_R_TYPE(r->r_info);
@@ -1511,6 +1521,9 @@ static int addend_arm_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r)
 	case R_ARM_PC24:
 	case R_ARM_CALL:
 	case R_ARM_JUMP24:
+	case R_ARM_THM_CALL:
+	case R_ARM_THM_JUMP24:
+	case R_ARM_THM_JUMP19:
 		/* From ARM ABI: ((S + A) | T) - P */
 		r->r_addend = (int)(long)(elf->hdr +
 		              sechdr->sh_offset +
-- 
1.8.1.2

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