From: Vineet Gupta <vgupta@synopsys.com>
Date: Mon, 12 Sep 2016 23:50:50 +0000 (-0700)
Subject: ARC: module: support R_ARC_32_PCREL relocation
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=94f4fb0841bfa5c1088a1b3a879a65bdd675ecd2;p=openwrt%2Fstaging%2Fblogic.git

ARC: module: support R_ARC_32_PCREL relocation

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---

diff --git a/arch/arc/include/asm/elf.h b/arch/arc/include/asm/elf.h
index 51a99e25fe33..7096f97a1434 100644
--- a/arch/arc/include/asm/elf.h
+++ b/arch/arc/include/asm/elf.h
@@ -23,8 +23,7 @@
 /* ARC Relocations (kernel Modules only) */
 #define  R_ARC_32		0x4
 #define  R_ARC_32_ME		0x1B
-#define  R_ARC_S25H_PCREL	0x10
-#define  R_ARC_S25W_PCREL	0x11
+#define  R_ARC_32_PCREL		0x31
 
 /*to set parameters in the core dumps */
 #define ELF_ARCH		EM_ARCOMPACT
diff --git a/arch/arc/kernel/module.c b/arch/arc/kernel/module.c
index 376e04622962..576a238434a1 100644
--- a/arch/arc/kernel/module.c
+++ b/arch/arc/kernel/module.c
@@ -106,10 +106,12 @@ int apply_relocate_add(Elf32_Shdr *sechdrs,
 		 */
 		relo_type = ELF32_R_TYPE(rel_entry[i].r_info);
 
-		if (likely(R_ARC_32_ME == relo_type))
+		if (likely(R_ARC_32_ME == relo_type))	/* ME ( S + A ) */
 			arc_write_me((unsigned short *)location, relocation);
-		else if (R_ARC_32 == relo_type)
+		else if (R_ARC_32 == relo_type)		/* ( S + A ) */
 			*((Elf32_Addr *) location) = relocation;
+		else if (R_ARC_32_PCREL == relo_type)	/* ( S + A ) - PDATA ) */
+			*((Elf32_Addr *) location) = relocation - location;
 		else
 			goto relo_err;