[patch] Arm branch locations and BLX conversion
Paul Brook
paul@codesourcery.com
Fri Oct 28 01:59:00 GMT 2005
The attached makes gas generate the new eabi branch relocations
(R_ARM_CALL/R_ARM_JUMP24), and avoids the obsolete XPC25/THM_XPC22
relocations.
It also implements BL<->BLX conversion for interworking of the CALL
relocations.
I'm not entirely happy about having check_use_blx, but I couldn't find anyhere
convenient to set globals->use_blx after elf32_arm_merge_eabi_attributes.
Tested with cross to arm-none-eabi.
Ok?
Paul
2005-10-27 Paul Brook <paul@codesourcery.com>
bfd/
* bfd-in2.h: Regenerate.
* elf32-arm.c (elf32_arm_reloc_map): Add BFD_RELOC_ARM_PCREL_CALL and
BFD_RELOC_ARM_PCREL_JUMP.
(check_use_blx): New function.
(bfd_elf32_arm_process_before_allocation): Don't allocate glue if
using BLX.
(elf32_arm_final_link_relocate): Perform bl<->blx conversion for
R_ARM_CALL and R_ARM_THM.
(elf32_arm_get_eabi_attr_int): New function.
(elf32_arm_size_dynamic_sections): Call check_use_blx.
* libbfd.h: Regenerate.
* reloc.c: Add BFD_RELOC_ARM_PCREL_CALL and BFD_RELOC_ARM_PCREL_JUMP.
gas/
* config/tc-arm.c (do_branch): Generate EABI branch relocations.
(do_bl): New function.
(do_blx): Generate BFD_RELOC_ARM_PCREL_CALL relocation.
(do_t_blx): Generate BFD_RELOC_THUMB_PCREL_BRANCH23.
(insns): Use do_bl.
(md_pcrel_from_section): Add BFD_RELOC_ARM_PCREL_CALL and
BFD_RELOC_ARM_PCREL_JUMP.
(md_apply_fix): Merge BFD_RELOC_ARM_PCREL_BRANCH and
BFD_RELOC_ARM_PCREL_BLX cases. Handle BFD_RELOC_ARM_PCREL_CALL and
BFD_RELOC_ARM_PCREL_JUMP.
(tc_gen_reloc): Handle BFD_RELOC_ARM_PCREL_CALL and
BFD_RELOC_ARM_PCREL_JUMP.
gas/testsuite/
* gas/arm/pic.d: Allow R_ARM_CALL relocations.
include/elf/
* arm.h (elf32_arm_get_eabi_attr_int): Add prototype.
ld/testsuite/
* ld-arm/arm-call.d: New test.
* ld-arm/arm-call1.s: New file.
* ld-arm/arm-call1.s: New file.
* ld-arm/arm-elf.exp: Add arm-call and mixed-app-v5.
* ld-arm/arm.ld: Add .glue_7 and .ARM.attribues.
* ld-arm/mixed-app-v5.d: New file.
* ld-arm/mixed-app.r: Tweak expected output.
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