[arm] Add TARGET2 and PREL31 relocations

[Richard Earnshaw]

On Fri, 2004-09-17 at 02:02, Paul Brook wrote:
> The attached patch adds gas, ld and bfd support for the R_ARM_TARGET2 and 
> R_ARM_PREL31 relocations. It also add bfd support for R_ARM_GOT_PREL 
> relocation.
> 
> The R_ARM_TARGET2 relocation maps to either a R_ARM_ABS32 or R_ARM_GOT_PREL 
> relocation (or other values in as-yet unsupported targets). We need to know 
> which of these the target is using before we scan the input symbols, so that 
> we can size the .got section correctly. I moved the setting of th TARGET{1,2} 
> meanings from arm_elf_before_allocation to 
> arm_elf_create_output_section_statements for this reason.
> 
> R_ARM_PREL31 is similar to R_ARM_REL32, but only a 31-bit offset.
> 
> Tested with cross to arm-none-elf and building --enable-targets=all.
> Ok?
> 
> Paul
> 
> 2004-09-17 Paul Brook  <paul@codesourcery.com>
> 
> bfd/
>  * bfd-in.h (bfd_elf32_arm_set_target_relocs): Add prototype.
>  (bfd_elf32_arm_process_before_allocation): Update prototype.
>  * bfd-in2.h: Regenerate.
>  * bfd/elf32-arm.h (elf32_arm_link_hash_table): Add target2_reloc.
>  (elf32_arm_link_hash_table_create): Set it.
>  (bfd_elf32_arm_process_before_allocation): Remove target1_is_rel.
>  (bfd_elf32_arm_set_target_relocs): New function.
>  (arm_real_reloc_type): New function.
>  (elf32_arm_final_link_relocate): Use it.  Handle R_ARM_PREL31 and
>  R_ARM_GOT_PREL.  Remove R_ARM_TARGET1.
>  (elf32_arm_gc_sweep_hook): Ditto.
>  (elf32_arm_check_relocs): Ditto.
>  (elf32_arm_relocate_section): Handle R_ARM_GOT_PREL.
>  * elfarm-nabi.c (elf32_arm_howto_table): Add R_ARM_PREL31 and
>  R_ARM_GOT_TARGET2.
>  (elf32_arm_got_prel): New variable.
>  (elf32_arm_howto_from_type): New function.
>  (elf32_arm_info_to_howto): Use it.
>  (elf32_arm_reloc_map): Add BFD_RELOC_ARM_PREL31 and
>  BFD_RELOC_ARM_TARGET2.
>  * libbfd.h: Regenerate.
>  * reloc.c: Add BFD_RELOC_ARM_TARGET2 and BFD_RELOC_ARM_PREL31.
> gas/
>  * config/tc-arm.c (s_arm_rel31): New funciton.
>  (md_pseudo_table): Add .rel31.
>  (md_apply_fix3): Handle BFD_RELOC_ARM_TARGET2, 
>  BFD_RELOC_32_PCREL and BFD_RELOC_ARM_PREL31.
>  (tc_gen_reloc): Handle BFD_RELOC_ARM_PREL31 and BFD_RELOC_ARM_TARGET2.
>  (arm_fix_adjustable): Return 0 for BFD_RELOC_ARM_TARGET2.
>  (arm_parse_reloc): Add (target2).
> gas/testsuite/
>  * gas/arm/pic.s: Add (target2).
>  * gas/arm/pic.d: Ditto.
> include/
>  * elf/arm.h: Remove R_ARM_STKCHK and R_ARM_THM_STKCHK.
>  Add R_ARM_TARGET2, R_ARM_PREL31, R_ARM_GOT_ABS, R_ARM_GOT_PREL,
>  R_ARM_GOT_BREL12, R_ARM_GOTOFF12 and R_ARM_GOTRELAX.
> ld/
>  * ld.texinfo: Rename arm-specific section.  Document --target*
>  * emulparams/armelf_fbsd.sh: Set TARGET2_TYPE.
>  * emulparams/armelf_linux.sh: Ditto.
>  * emulparams/armelf_nbsd.sh: Ditto.
>  * emultempl/armelf.em: Set default for TARGET2_TYPE.
>  (target2_type): New variable.
>  (arm_elf_before_allocation): Don't pass target1_type.
>  (arm_elf_create_output_section_statements): New function.
>  (PARSE_AND_LIST_PROLOGUE): Add OPTION_TARGET2.
>  (PARSE_AND_LIST_LONGOPTS, PARSE_AND_LIST_OPTIONS): Add --target=.
>  (PARSE_AND_LIST_ARGS_CASES): Handle OPTION_TARGET2.
>  (LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS): Set.
>  * emultempl/armelf_oabi.em (_before_allocation): Remove extra
>  argument to bfd_elf32_arm_process_before_allocation.
> ld/testsuite/
>  * ld-arm/arm-target1-{abs,rel}.d}: New files.
>  * ld-arm/arm-target1.s: New file.
>  * ld-arm/arm-target2-{,got-}rel.d: New files.
>  * ld-arm/arm-target2.s: New file.
>  * ld-arm/arm-rel31.d: New files.
>  * ld-arm/arm-rel31.s: New files.
>  * ld-arm/arm.ld: New file.
>  * ld-arm/arm-elf.exp: Add new tests.

OK.