Hi

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. Relocation specified in 
https://developer.arm.com/docs/ihi0044/latest/elf-for-the-arm-architecture-abi-2019q1-documentation#aaelf32-table4-9

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.

Testing: Builds successfully and no regressions.

Thanks
Sudi


ChangeLog entries are as follows :

*** bfd/ChnageLog ***

2019-04-04  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 ***

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

	* arm.h (R_ARM_THM_BF18): 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_BF19.
	(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_BF18.

*** opcodes/ChangeLog ***

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

	* arm-dis.c (print_insn_thumb32): Updated to accept new %Y pattern.