From: Nick Clifton <nickc@redhat.com>
Date: Wed, 1 Jul 2009 14:48:26 +0000 (+0000)
Subject:         PR 10072
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=e1ec24c6f31afae5a5175abecdcd9fd4d7893c4b;p=binutils-gdb.git

    PR 10072
        * elf32-arm.c (elf32_arm_final_link_relocate): Add code to handle
        to R_ARM_THM_PC8 relocation.
---

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 6b00d40bd6f..aca27d57612 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,9 @@
+2009-07-01  Nick Clifton  <nickc@redhat.com>
+
+	PR 10072
+	* elf32-arm.c (elf32_arm_final_link_relocate): Add code to handle
+	to R_ARM_THM_PC8 relocation.
+
 2009-06-29  Nick Clifton  <nickc@redhat.com>
 
 	* elf-m10300.c (mn10300_elf_relax_section): Allow for the
diff --git a/bfd/elf32-arm.c b/bfd/elf32-arm.c
index cd40eefbf5c..2d53304e4e3 100644
--- a/bfd/elf32-arm.c
+++ b/bfd/elf32-arm.c
@@ -7178,6 +7178,40 @@ elf32_arm_final_link_relocate (reloc_howto_type *           howto,
         return bfd_reloc_ok;
       }
 
+    case R_ARM_THM_PC8:
+      /* PR 10073:  This reloc is not generated by the GNU toolchain,
+	 but it is supported for compatibility with third party libraries
+	 generated by other compilers, specifically the ARM/IAR.  */
+      {
+	bfd_vma insn;
+	bfd_signed_vma relocation;
+
+	insn = bfd_get_16 (input_bfd, hit_data);
+
+        if (globals->use_rel)
+	  addend = (insn & 0x00ff) << 2;
+
+	relocation = value + addend;
+	relocation -= (input_section->output_section->vma
+		       + input_section->output_offset
+		       + rel->r_offset);
+
+        value = abs (relocation);
+
+	/* We do not check for overflow of this reloc.  Although strictly
+	   speaking this is incorrect, it appears to be necessary in order
+	   to work with IAR generated relocs.  Since GCC and GAS do not
+	   generate R_ARM_THM_PC8 relocs, the lack of a check should not be
+	   a problem for them.  */
+	value &= 0x3fc;
+
+	insn = (insn & 0xff00) | (value >> 2);
+
+	bfd_put_16 (input_bfd, insn, hit_data);
+
+        return bfd_reloc_ok;
+      }
+
     case R_ARM_THM_PC12:
       /* Corresponds to: ldr.w reg, [pc, #offset].  */
       {