svdavidson writes in Bug 459: add support for x86_64 relocations from modutils 2.4.27

git-svn-id: svn://busybox.net/trunk/busybox@11724 69ca8d6d-28ef-0310-b511-8ec308f3f277

1 files changed, 72 insertions, 1 deletions

diff --git a/modutils/insmod.c b/modutils/insmod.c
index 94e66f48c..38bddbb6f 100644
--- a/modutils/insmod.c
+++ b/modutils/insmod.c
@@ -296,6 +296,9 @@ extern int insmod_ng_main( int argc, char **argv);
 #if defined(__x86_64__)
 #define MATCH_MACHINE(x) (x == EM_X86_64)
 #define SHT_RELM        SHT_RELA
+#define CONFIG_USE_GOT_ENTRIES
+#define CONFIG_GOT_ENTRY_SIZE 8
+#define CONFIG_USE_SINGLE
 #define Elf64_RelM      Elf64_Rela
 #define ELFCLASSM       ELFCLASS64
 #endif
@@ -858,7 +861,6 @@ arch_apply_relocation(struct obj_file *f,
 
         switch (ELF32_R_TYPE(rel->r_info)) {
 
-
 #if defined(__arm__)
                 case R_ARM_NONE:
                         break;
@@ -1010,6 +1012,75 @@ arch_apply_relocation(struct obj_file *f,
                         *loc += v - got;
                         break;
 
+#elif defined(__x86_64__)
+
+                case R_X86_64_NONE:
+                        break;
+
+                case R_X86_64_64:
+                        *loc += v;
+                        break;
+
+                case R_X86_64_32:
+                        *(unsigned int *) loc += v;
+                        if (v > 0xffffffff)
+                        {
+                                ret = obj_reloc_overflow; /* Kernel module compiled without -mcmodel=kernel. */
+                                /* error("Possibly is module compiled without -mcmodel=kernel!"); */
+                        }
+                        break;
+
+                case R_X86_64_32S:
+                        *(signed int *) loc += v;
+                        break;
+
+                case R_X86_64_16:
+                        *(unsigned short *) loc += v;
+                        break;
+
+                case R_X86_64_8:
+                        *(unsigned char *) loc += v;
+                        break;
+
+                case R_X86_64_PC32:
+                        *(unsigned int *) loc += v - dot;
+                        break;
+
+                case R_X86_64_PC16:
+                        *(unsigned short *) loc += v - dot;
+                        break;
+
+                case R_X86_64_PC8:
+                        *(unsigned char *) loc += v - dot;
+                        break;
+
+                case R_X86_64_GLOB_DAT:
+                case R_X86_64_JUMP_SLOT:
+                        *loc = v;
+                        break;
+
+                case R_X86_64_RELATIVE:
+                        *loc += f->baseaddr;
+                        break;
+
+                case R_X86_64_GOT32:
+                case R_X86_64_GOTPCREL:
+                        goto bb_use_got;
+#if 0
+                        assert(isym != NULL);
+                        if (!isym->gotent.reloc_done)
+                        {
+                                isym->gotent.reloc_done = 1;
+                                *(Elf64_Addr *)(ifile->got->contents + isym->gotent.offset) = v;
+                        }
+                        /* XXX are these really correct?  */
+                        if (ELF64_R_TYPE(rel->r_info) == R_X86_64_GOTPCREL)
+                                *(unsigned int *) loc += v + isym->gotent.offset;
+                        else
+                                *loc += isym->gotent.offset;
+                        break;
+#endif
+
 #elif defined(__mc68000__)
 
                 case R_68K_NONE: