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[binutils, ARM, 10/16] BFCSEL infrastructure with new global reloc R_ARM_THM_BF12

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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 BFCSEL 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_BF12.

The inconsistency between external R_ARM_THM_BF12 and internal
BFD_RELOC_ARM_THUMB_BF13 is because internally we count the static bit-0 of the
immediate and we don't externally.

ChangeLog entries are as follows :

ChangeLog entries are as follows :

*** bfd/ChnageLog ***

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

	* reloc.c (BFD_RELOC_ARM_THUMB_BF13): New.
	* bfd-in2.h: Regenerated.
	* libbfd.h: Regenerated.
	* elf32-arm.c (elf32_arm_howto_table_1): New entry for R_ARM_THM_BF13.
	(elf32_arm_reloc_map elf32_arm_reloc_map): Map BFD_RELOC_ARM_THUMB_BF13
	and R_ARM_THM_BF12 together.
	(elf32_arm_final_link_relocate): New switch case for R_ARM_THM_BF13.

*** elfcpp/ChangeLog ***

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

	* arm.h (R_ARM_THM_BF12): New relocation code.

*** gas/ChangeLog ***

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

	* config/tc-arm.c (md_pcrel_from_section): New switch case for
	BFD_RELOC_ARM_THUMB_BF13.
	(md_appdy_fix): Likewise.
	(tc_gen_reloc): Likewise.

*** include/ChangeLog ***

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

	* elf/arm.h (START_RELOC_NUMBERS): New entry for R_ARM_THM_BF12.

*** opcodes/ChangeLog ***

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

	* arm-dis.c (print_insn_thumb32): Updated to accept new %Z pattern.
This commit is contained in:
Andre Vieira 2019-04-15 11:46:54 +01:00
parent 65d1bc05e8
commit 1889da7048
13 changed files with 152 additions and 1 deletions
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1
elfcpp/arm.h
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@ -197,6 +197,7 @@ enum
// 131 - 135 Unallocated
// Relocations for Armv8.1-M Mainline (BF/BFL)
R_ARM_THM_BF16 = 136, // Static Thumb32 ((S + A) | T) – P
R_ARM_THM_BF12 = 137, // Static Thumb32 ((S + A) | T) – P
R_ARM_THM_BF18 = 138, // Static Thumb32 ((S + A) | T) – P
// 139 Unallocated
// 140 - 159 Dynamic Reserved for future allocation