Merge branch 'master' into for-linus

1 files changed, 34 insertions, 0 deletions

diff --git a/arch/arm/kernel/module.c b/arch/arm/kernel/module.c
index c628bdf6c430..6b4605893f1e 100644
--- a/arch/arm/kernel/module.c
+++ b/arch/arm/kernel/module.c
@@ -102,7 +102,9 @@ apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
                 unsigned long loc;
                 Elf32_Sym *sym;
                 s32 offset;
+#ifdef CONFIG_THUMB2_KERNEL
                 u32 upper, lower, sign, j1, j2;
+#endif
 
                 offset = ELF32_R_SYM(rel->r_info);
                 if (offset < 0 || offset > (symsec->sh_size / sizeof(Elf32_Sym))) {
@@ -185,6 +187,7 @@ apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
                                         (offset & 0x0fff);
                         break;
 
+#ifdef CONFIG_THUMB2_KERNEL
                 case R_ARM_THM_CALL:
                 case R_ARM_THM_JUMP24:
                         upper = *(u16 *)loc;
@@ -233,9 +236,40 @@ apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
                         *(u16 *)(loc + 2) = (u16)((lower & 0xd000) |
                                                   (j1 << 13) | (j2 << 11) |
                                                   ((offset >> 1) & 0x07ff));
+                        break;
+
+                case R_ARM_THM_MOVW_ABS_NC:
+                case R_ARM_THM_MOVT_ABS:
                         upper = *(u16 *)loc;
                         lower = *(u16 *)(loc + 2);
+
+                        /*
+                         * MOVT/MOVW instructions encoding in Thumb-2:
+                         *
+                         * i    = upper[10]
+                         * imm4 = upper[3:0]
+                         * imm3 = lower[14:12]
+                         * imm8 = lower[7:0]
+                         *
+                         * imm16 = imm4:i:imm3:imm8
+                         */
+                        offset = ((upper & 0x000f) << 12) |
+                                ((upper & 0x0400) << 1) |
+                                ((lower & 0x7000) >> 4) | (lower & 0x00ff);
+                        offset = (offset ^ 0x8000) - 0x8000;
+                        offset += sym->st_value;
+
+                        if (ELF32_R_TYPE(rel->r_info) == R_ARM_THM_MOVT_ABS)
+                                offset >>= 16;
+
+                        *(u16 *)loc = (u16)((upper & 0xfbf0) |
+                                            ((offset & 0xf000) >> 12) |
+                                            ((offset & 0x0800) >> 1));
+                        *(u16 *)(loc + 2) = (u16)((lower & 0x8f00) |
+                                                  ((offset & 0x0700) << 4) |
+                                                  (offset & 0x00ff));
                         break;
+#endif
 
                 default:
                         printk(KERN_ERR "%s: unknown relocation: %u\n",