Fix resolution of R_ARM_THM_ALU_PREL_11_0 relocation against Thumb symbols.

	PR ld/21458
	* elf32-arm.c (elf32_arm_final_link_relocate): Set the bottom bit
	of the value when resolving a R_ARM_THM_ALU_PREL_11_0 relocation
	and the destination is a Thumb symbol.

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 5205548..917a349 100644 (file)
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,10 @@
+2017-05-09  Andrew Goedhart  <Andrewgoedhart@simplepowersolutions.co.za>
+
+       PR ld/21458
+       * elf32-arm.c (elf32_arm_final_link_relocate): Set the bottom bit
+       of the value when resolving a R_ARM_THM_ALU_PREL_11_0 relocation
+       and the destination is a Thumb symbol.
+
 2017-05-08  H.J. Lu  <hongjiu.lu@intel.com>
 
        * elf32-i386.c (elf_i386_get_synthetic_symtab): Add missing

diff --git a/bfd/elf32-arm.c b/bfd/elf32-arm.c
index 8dcaf45..23a02c0 100644 (file)
--- a/bfd/elf32-arm.c
+++ b/bfd/elf32-arm.c
@@ -10511,6 +10511,10 @@ elf32_arm_final_link_relocate (reloc_howto_type *           howto,
        if (value >= 0x1000)
          return bfd_reloc_overflow;
 
+       /* Destination is Thumb.  Force bit 0 to 1 to reflect this.  */
+       if (branch_type == ST_BRANCH_TO_THUMB)
+         value |= 1;
+
        insn = (insn & 0xfb0f8f00) | (value & 0xff)
             | ((value & 0x700) << 4)
             | ((value & 0x800) << 15);