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b4e87f2c1e
binutils-gdb/ld/testsuite
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Tamar Christina b4e87f2c1e Arm: Fix performance issue with thumb-2 tailcalls 
We currently use a padding NOP after a Thumb to Arm interworking veneer (BX pc).
The NOP is never executed but may result in a performance penalty on some cores.

For this reason this patch changes the NOPs after Thumb to Arm veneers into B .-2
and adds a note to this in the source code for future reference.

bfd/ChangeLog:

	* elf32-arm.c (elf32_thumb2_plt_entry, elf32_arm_plt_thumb_stub,
	elf32_arm_stub_long_branch_v4t_thumb_thumb,
	elf32_arm_stub_long_branch_v4t_thumb_arm,
	elf32_arm_stub_short_branch_v4t_thumb_arm,
	elf32_arm_stub_long_branch_v4t_thumb_arm_pic,
	elf32_arm_stub_long_branch_v4t_thumb_thumb_pic,
	elf32_arm_stub_long_branch_v4t_thumb_tls_pic): Change nop to branch to
	previous instruction.

ld/ChangeLog:

	* testsuite/ld-arm/cortex-a8-fix-b-plt.d: Update Testcase.
	* testsuite/ld-arm/cortex-a8-fix-b-rel-arm.d: Likewise.
	* testsuite/ld-arm/cortex-a8-fix-bcc-plt.d: Likewise.
	* testsuite/ld-arm/farcall-cond-thumb-arm.d: Likewise.
	* testsuite/ld-arm/farcall-mixed-app.d: Likewise.
	* testsuite/ld-arm/farcall-mixed-app2.d: Likewise.
	* testsuite/ld-arm/farcall-mixed-lib-v4t.d: Likewise.
	* testsuite/ld-arm/farcall-thumb-arm-pic-veneer.d: Likewise.
	* testsuite/ld-arm/farcall-thumb-arm-short.d: Likewise.
	* testsuite/ld-arm/farcall-thumb-arm.d: Likewise.
	* testsuite/ld-arm/farcall-thumb-thumb-pic-veneer.d: Likewise.
	* testsuite/ld-arm/farcall-thumb-thumb.d: Likewise.
	* testsuite/ld-arm/fix-arm1176-on.d: Likewise.
	* testsuite/ld-arm/ifunc-10.dd: Likewise.
	* testsuite/ld-arm/ifunc-2.dd: Likewise.
	* testsuite/ld-arm/ifunc-4.dd: Likewise.
	* testsuite/ld-arm/ifunc-6.dd: Likewise.
	* testsuite/ld-arm/ifunc-8.dd: Likewise.
	* testsuite/ld-arm/jump-reloc-veneers-long.d: Likewise.
	* testsuite/ld-arm/mixed-app.d: Likewise.
	* testsuite/ld-arm/thumb2-b-interwork.d: Likewise.
	* testsuite/ld-arm/tls-longplt.d: Likewise.
	* testsuite/ld-arm/tls-thumb1.d: Likewise.
2019-08-20 16:35:28 +01:00
..
config Use better test for usable compiler in ld testsuite. 2019-04-24 12:14:56 -07:00
ld-aarch64 Change the output of readelf's note display so that the "Data size" column header is left justified. 2019-08-08 17:04:31 +01:00
ld-alpha Fix alpha testsuite regression 2019-06-14 10:23:20 +09:30
ld-arc [ARC] Add linker relaxation. 2019-07-24 16:33:29 +03:00
ld-arm Arm: Fix performance issue with thumb-2 tailcalls 2019-08-20 16:35:28 +01:00
ld-auto-import Use better test for usable compiler in ld testsuite. 2019-04-24 12:14:56 -07:00
ld-avr Fix PR 24571 - Relaxation does not shorten jmp or call to target at pc-relative range boundary 2019-05-21 12:48:06 +05:30
ld-bootstrap Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-bpf ld: use a specific linker script in BPF targets 2019-08-07 13:57:30 +02:00
ld-cdtest Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-checks Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-cris Dynamic TLS section symbols 2019-07-13 09:57:50 +09:30
ld-crx Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-csky Add support for the C_SKY series of processors. 2018-07-30 12:24:14 +01:00
ld-cygwin Use better test for usable compiler in ld testsuite. 2019-04-24 12:14:56 -07:00
ld-d10v Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-discard Support tcl procedure calls in run_dump_test xfail 2019-05-30 00:52:08 +09:30
ld-elf Add support for a MIPS specific .MIPS.xhash section. 2019-08-09 11:06:37 +01:00
ld-elfcomm Use better test for usable compiler in ld testsuite. 2019-04-24 12:14:56 -07:00
ld-elfvers Use better test for usable compiler in ld testsuite. 2019-04-24 12:14:56 -07:00
ld-elfvsb Use better test for usable compiler in ld testsuite. 2019-04-24 12:14:56 -07:00
ld-elfweak Use better test for usable compiler in ld testsuite. 2019-04-24 12:14:56 -07:00
ld-fastcall Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-frv Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-gc Use better test for usable compiler in ld testsuite. 2019-04-24 12:14:56 -07:00
ld-h8300 Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-i386 Change the output of readelf's note display so that the "Data size" column header is left justified. 2019-08-08 17:04:31 +01:00
ld-ia64 Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-ifunc Use better test for usable compiler in ld testsuite. 2019-04-24 12:14:56 -07:00
ld-libs Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-linkonce Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-m68hc11 Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-m68k run_dump_test source in build directory 2019-01-08 18:50:54 +10:30
ld-mep Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-metag Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-mips-elf Add support for a MIPS specific .MIPS.xhash section. 2019-08-09 11:06:37 +01:00
ld-misc Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-mmix Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-mn10300 Use better test for usable compiler in ld testsuite. 2019-04-24 12:14:56 -07:00
ld-msp430-elf MSP430 Linker: Define __crt0_init_bss/__crt0_movedata symbols when .lower or .either prefixed sections are present. 2019-04-17 15:05:08 +01:00
ld-nds32 Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-nios2 Run more ld tests when not native 2017-01-02 23:48:08 +10:30
ld-or1k Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-pe Use better test for usable compiler in ld testsuite. 2019-04-24 12:14:56 -07:00
ld-pie Use better test for usable compiler in ld testsuite. 2019-04-24 12:14:56 -07:00
ld-plugin Ajdust lto-3r and lto-5r tests for powerpc64 2019-07-26 10:02:34 +09:30
ld-powerpc PowerPC tlsie test fix 2019-08-02 12:41:05 +09:30
ld-pru Fix binary compatibility between GCC and the TI compiler for the PRU target. 2018-05-09 11:39:32 +01:00
ld-riscv-elf RISC-V: Fix lui relaxation issue with code at address 0. 2019-08-15 12:01:13 -07:00
ld-s12z Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-s390 Dynamic TLS section symbols 2019-07-13 09:57:50 +09:30
ld-scripts Move ld-scripts size tests 2019-07-23 18:22:01 +09:30
ld-selective Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-sh Use better test for usable compiler in ld testsuite. 2019-04-24 12:14:56 -07:00
ld-shared Use better test for usable compiler in ld testsuite. 2019-04-24 12:14:56 -07:00
ld-size Use better test for usable compiler in ld testsuite. 2019-04-24 12:14:56 -07:00
ld-sparc Dynamic TLS section symbols 2019-07-13 09:57:50 +09:30
ld-spu Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-srec ld: use a specific linker script in BPF targets 2019-08-07 13:57:30 +02:00
ld-tic6x Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-tilegx Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-tilepro Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-undefined ld: use a specific linker script in BPF targets 2019-08-07 13:57:30 +02:00
ld-unique Use better test for usable compiler in ld testsuite. 2019-04-24 12:14:56 -07:00
ld-v850 Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-vax-elf Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-visium Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-vxworks Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-x86-64 x86-64: Move PIC check for PC-relative relocations back 2019-08-16 14:25:58 -07:00
ld-xc16x Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-xstormy16 Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
ld-xtensa bfd: xtensa: fix shrink_dynamic_reloc_sections for export-dynamic 2019-03-29 10:02:10 -07:00
ld-z8k Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
lib s12z genelf.em 2019-05-30 01:01:42 +09:30
ChangeLog-2004
ChangeLog-2005
ChangeLog-2006
ChangeLog-2007
ChangeLog-2008
ChangeLog-2009
ChangeLog-2010
ChangeLog-2011
ChangeLog-2012
ChangeLog-2013
ChangeLog-2014
ChangeLog-2015 binutils ChangeLog rotation 2016-01-01 22:59:17 +10:30
ChangeLog-9303