2008-02-20 Paul Brook <paul@codesourcery.com>

	ld/
	* emultempl/armelf.em (OPTION_FIX_V4BX_INTERWORKING): Define.
	(PARSE_AND_LIST_LONGOPTS): Add fix-v4bx-interworking.
	(PARSE_AND_LIST_OPTIONS): Ditto.
	(PARSE_AND_LIST_ARGS_CASES): Handle OPTION_FIX_V4BX_INTERWORKING.
	* emulparams/armelf.sh (OTHER_TEXT_SECTIONS): Add .v4_bx.
	* emulparams/armelf_linux.sh (OTHER_TEXT_SECTIONS): Ditto.
	* emulparams/armnto.sh (OTHER_TEXT_SECTIONS): Ditto.
	* ld.texinfo: Document --fix-v4bx-interworking.

	ld/testsuite/
	* ld-arm/armv4-bx.d: New test.
	* ld-arm/armv4-bx.s: New test.
	* ld-arm/arm.ld: Add .v4bx.
	* ld-arm/arm-elf.exp: Add armv4-bx.

	gas/testsuite/
	* gas/arm/thumb.d: Exclude EABI targets.
	* gas/arm/arch4t.d: Exclude EABI targts.
	* gas/arm/v4bx.d: New test.
	* gas/arm/v4bx.s: New test.
	* gas/arm/thumb-eabi.d: New test.
	* gas/arm/arch4t-eabi.d: New test.

	gas/
	* config/tc-arm.c (fix_v4bx): New variable.
	(do_bx): Generate V4BX relocations.
	(md_assemble): Allow bx on v4 codes when fix_v4bx.
	(md_apply_fix): Handle BFD_RELOC_ARM_V4BX.
	(tc_gen_reloc): Ditto.
	(OPTION_FIX_V4BX): Define.
	(md_longopts): Add fix-v4bx.
	(md_parse_option): Handle OPTION_FIX_V4BX.
	(md_show_usage): Document --fix-v4bx.
	* doc/c-arm.texi: Document --fix-v4bx.

	bfd/
	* reloc.c: Add BFD_RELOC_ARM_V4BX.
	* elf32-arm.c (elf32_arm_reloc_map): Add BFD_RELOC_ARM_V4BX.
	(ARM_BX_GLUE_SECTION_NAME, ARM_BX_GLUE_SECTION_NAME): Define.
	(elf32_arm_link_hash_table): Add bx_glue_size and bx_glue_offset.
	Update comment for fix_v4bx.
	(elf32_arm_link_hash_table_create): Zero bx_glue_size and
	bx_glue_offset.
	(ARM_BX_VENEER_SIZE, armbx1_tst_insn, armbx2_moveq_insn,
	armbx3_bx_insn): New.
	(bfd_elf32_arm_allocate_interworking_sections): Allocate BX veneer
	section.
	(bfd_elf32_arm_add_glue_sections_to_bfd): Ditto.
	(bfd_elf32_arm_process_before_allocation): Record BX veneers.
	(record_arm_bx_glue, elf32_arm_bx_glue): New functions.
	(elf32_arm_final_link_relocate): Handle BX veneers.
	(elf32_arm_output_arch_local_syms): Output mapping symbol for .v4_bx.
	* bfd-in2.h: Regenerate.
	* libbfd.h: Regenerate.

1 files changed, 7 insertions, 0 deletions

diff --git a/ld/emultempl/armelf.em b/ld/emultempl/armelf.em
index 7d0320d..29e9902 100644
--- a/ld/emultempl/armelf.em
+++ b/ld/emultempl/armelf.em
@@ -264,6 +264,7 @@ PARSE_AND_LIST_PROLOGUE='
 #define OPTION_VFP11_DENORM_FIX		308
 #define OPTION_NO_ENUM_SIZE_WARNING	309
 #define OPTION_PIC_VENEER		310
+#define OPTION_FIX_V4BX_INTERWORKING	311
 '
 
 PARSE_AND_LIST_SHORTOPTS=p
@@ -276,6 +277,7 @@ PARSE_AND_LIST_LONGOPTS='
   { "target1-abs", no_argument, NULL, OPTION_TARGET1_ABS},
   { "target2", required_argument, NULL, OPTION_TARGET2},
   { "fix-v4bx", no_argument, NULL, OPTION_FIX_V4BX},
+  { "fix-v4bx-interworking", no_argument, NULL, OPTION_FIX_V4BX_INTERWORKING},
   { "use-blx", no_argument, NULL, OPTION_USE_BLX},
   { "vfp11-denorm-fix", required_argument, NULL, OPTION_VFP11_DENORM_FIX},
   { "no-enum-size-warning", no_argument, NULL, OPTION_NO_ENUM_SIZE_WARNING},
@@ -289,6 +291,7 @@ PARSE_AND_LIST_OPTIONS='
   fprintf (file, _("  --target1=abs               Interpret R_ARM_TARGET1 as R_ARM_ABS32\n"));
   fprintf (file, _("  --target2=<type>            Specify definition of R_ARM_TARGET2\n"));
   fprintf (file, _("  --fix-v4bx                  Rewrite BX rn as MOV pc, rn for ARMv4\n"));
+  fprintf (file, _("  --fix-v4bx-interworking     Rewrite BX rn branch to ARMv4 interworking veneer\n"));
   fprintf (file, _("  --use-blx                   Enable use of BLX instructions\n"));
   fprintf (file, _("  --vfp11-denorm-fix          Specify how to fix VFP11 denorm erratum\n"));
   fprintf (file, _("  --no-enum-size-warning      Don'\''t warn about objects with incompatible"
@@ -325,6 +328,10 @@ PARSE_AND_LIST_ARGS_CASES='
       fix_v4bx = 1;
       break;
 
+    case OPTION_FIX_V4BX_INTERWORKING:
+      fix_v4bx = 2;
+      break;
+
     case OPTION_USE_BLX:
       use_blx = 1;
       break;