add the R_ARM_V4BX relocation to the ARM kernel module loader

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15208 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/generic-2.6/patches-2.6.28/230-add-r_arm_v4bx-relocation-for-arm-module-loader.patch

+diff --git a/arch/arm/include/asm/elf.h b/arch/arm/include/asm/elf.h
+index a58378c..ce3b36e 100644
+--- a/arch/arm/include/asm/elf.h
++++ b/arch/arm/include/asm/elf.h
+@@ -50,6 +50,7 @@  typedef struct user_fp elf_fpregset_t;
+ #define R_ARM_ABS32	2
+ #define R_ARM_CALL	28
+ #define R_ARM_JUMP24	29
++#define R_ARM_V4BX	40
+ 
+ /*
+  * These are used to set parameters in the core dumps.
+diff --git a/arch/arm/kernel/module.c b/arch/arm/kernel/module.c
+index dab48f2..9f509fd 100644
+--- a/arch/arm/kernel/module.c
++++ b/arch/arm/kernel/module.c
+@@ -132,6 +132,15 @@  apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
+ 			*(u32 *)loc |= offset & 0x00ffffff;
+ 			break;
+ 
++	       case R_ARM_V4BX:
++		       /* Preserve Rm and the condition code. Alter
++			* other bits to re-code instruction as
++			* MOV PC,Rm.
++			*/
++		       *(u32 *)loc &= 0xf000000f;
++		       *(u32 *)loc |= 0x01a0f000;
++		       break;
++
+ 		default:
+ 			printk(KERN_ERR "%s: unknown relocation: %u\n",
+ 			       module->name, ELF32_R_TYPE(rel->r_info));
+