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[binutils, ARM, 8/16] BFL infrastructure with new global reloc R_ARM_THM_BF18

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This patch is part of a series of patches to add support for Armv8.1-M Mainline instructions to binutils.
This adds infrastructure for the BFL instructions which is one of the first instructions in Arm that have more than one relocations in them.

This adds a new relocation R_ARM_THM_BF18.

The inconsistency between external R_ARM_THM_BF18 and internal
BFD_RELOC_ARM_THUMB_BF19 is because internally we count the static bit-0 of the immediate and we don't externally.

ChangeLog entries are as follows :

*** bfd/ChangeLog ***

2019-04-15  Sudakshina Das  <sudi.das@arm.com>

	* reloc.c (BFD_RELOC_ARM_THUMB_BF19): New
	* libbfd.h: Regenerated.
	* bfd-in2.h: Regenerated.
	* bfd-elf32-arm.c (elf32_arm_howto_table_1): New entry for R_ARM_THM_BF18.
	(elf32_arm_reloc_map elf32_arm_reloc_map): Map BFD_RELOC_ARM_THUMB_BF19
	and R_ARM_THM_BF18 together.
	(elf32_arm_final_link_relocate): New switch case for R_ARM_THM_BF19.

*** elfcpp/ChangeLog ***

2019-04-15  Sudakshina Das  <sudi.das@arm.com>

	* arm.h (R_ARM_THM_BF18): New relocation code.

*** gas/ChangeLog ***

2019-04-15  Sudakshina Das  <sudi.das@arm.com>

	* config/tc-arm.c (md_pcrel_from_section): New switch case for
	BFD_RELOC_ARM_THUMB_BF19.
	(md_appdy_fix): Likewise.
	(tc_gen_reloc): Likewise.

*** include/ChangeLog ***

2019-04-15  Sudakshina Das  <sudi.das@arm.com>

	* elf/arm.h (START_RELOC_NUMBERS): New entry for R_ARM_THM_BF18.

*** opcodes/ChangeLog ***

2019-04-15  Sudakshina Das  <sudi.das@arm.com>

	* arm-dis.c (print_insn_thumb32): Updated to accept new %Y pattern.
This commit is contained in:
Andre Vieira
2019-04-15 11:37:51 +01:00
parent f1c7f42126
commit 1caf72a584
13 changed files with 154 additions and 1 deletions
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1
include/elf/arm.h
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@ -242,6 +242,7 @@ START_RELOC_NUMBERS (elf_arm_reloc_type)
RELOC_NUMBER (R_ARM_THM_ALU_ABS_G2_NC,134)
RELOC_NUMBER (R_ARM_THM_ALU_ABS_G3_NC,135)
RELOC_NUMBER (R_ARM_THM_BF16, 136)
RELOC_NUMBER (R_ARM_THM_BF18, 138)
RELOC_NUMBER (R_ARM_IRELATIVE, 160)
RELOC_NUMBER (R_ARM_GOTFUNCDESC, 161)