Handle X86_64_PC64 relocation.

Those are generated by some cygwin compilers.

ChangeLog

@@ -1,3 +1,9 @@
+2013-12-16  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	Handle X86_64_PC64 relocation.
+
+	Those are generated by some cygwin compilers.
+
 2013-12-16  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	Determine the need for mingw-related stubs at compile time rather than

grub-core/kern/x86_64/dl.c

@@ -80,6 +80,13 @@ grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr,
 	  }
 	  break;
 
+	case R_X86_64_PC64:
+	  {
+	    *addr64 += rel->r_addend + sym->st_value -
+	      (Elf64_Xword) seg->addr - rel->r_offset;
+	  }
+	  break;
+
 	case R_X86_64_32:
 	  {
 	    grub_uint64_t value = *addr32 + rel->r_addend + sym->st_value;

include/grub/elf.h

@@ -1132,6 +1132,7 @@ typedef struct
 #define R_X86_64_PC16		13
 #define R_X86_64_8		14
 #define R_X86_64_PC8		15
+#define R_X86_64_PC64		24
 
 /* Legal values for ST_TYPE subfield of st_info (symbol type).  */
 

util/grub-mkimagexx.c

@@ -709,6 +709,18 @@ SUFFIX (relocate_addresses) (Elf_Ehdr *e, Elf_Shdr *sections,
 		    break;
 		  }
 
+		case R_X86_64_PC64:
+		  {
+		    *target = grub_host_to_target64 (grub_target_to_host64 (*target)
+						     + addend + sym_addr
+						     - target_section_addr - offset
+						     - image_target->vaddr_offset);
+		    grub_util_info ("relocating an R_X86_64_PC64 entry to 0x%llx at the offset 0x%llx",
+				    (unsigned long long) *target,
+				    (unsigned long long) offset);
+		    break;
+		  }
+
 		case R_X86_64_32:
 		case R_X86_64_32S:
 		  {