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Arm: Fix performance issue with thumb-2 tailcalls

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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.
This commit is contained in:
Tamar Christina 2019-08-20 16:34:26 +01:00
parent d7a11d1383
commit b4e87f2c1e
26 changed files with 130 additions and 86 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
bfd/ChangeLog
View File

@ -1,3 +1,14 @@
2019-08-20 Tamar Christina <tamar.christina@arm.com>
* 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.
2019-08-19 Tom Tromey <tromey@adacore.com>
* dwarf2.c (_bfd_dwarf2_find_symbol_bias): Create hash table

25
bfd/elf32-arm.c
View File

@ -2329,6 +2329,11 @@ static const unsigned long dl_tlsdesc_lazy_trampoline [] =
0x00000018, /* 4: .word _GLOBAL_OFFSET_TABLE_ - 2b - 8 */
};
/* NOTE: [Thumb nop sequence]
When adding code that transitions from Thumb to Arm the instruction that
should be used for the alignment padding should be 0xe7fd (b .-2) instead of
a nop for performance reasons. */
/* ARM FDPIC PLT entry. */
/* The last 5 words contain PLT lazy fragment code and data. */
static const bfd_vma elf32_arm_fdpic_plt_entry [] =
@ -2446,8 +2451,8 @@ static const bfd_vma elf32_thumb2_plt_entry [] =
0x0c00f240, /* movw ip, #0xNNNN */
0x0c00f2c0, /* movt ip, #0xNNNN */
0xf8dc44fc, /* add ip, pc */
0xbf00f000 /* ldr.w pc, [ip] */
/* nop */
0xe7fdf000 /* ldr.w pc, [ip] */
/* b .-2 */
};
/* The format of the first entry in the procedure linkage table
@ -2487,7 +2492,7 @@ static const bfd_vma elf32_arm_vxworks_shared_plt_entry[] =
static const bfd_vma elf32_arm_plt_thumb_stub [] =
{
0x4778, /* bx pc */
0x46c0 /* nop */
0xe7fd /* b .-2 */
};
/* The entries in a PLT when using a DLL-based target with multiple
@ -2574,6 +2579,8 @@ typedef struct
int reloc_addend;
} insn_sequence;
/* See note [Thumb nop sequence] when adding a veneer. */
/* Arm/Thumb -> Arm/Thumb long branch stub. On V5T and above, use blx
to reach the stub if necessary. */
static const insn_sequence elf32_arm_stub_long_branch_any_any[] =
@ -2624,7 +2631,7 @@ static const insn_sequence elf32_arm_stub_long_branch_thumb2_only_pure[] =
static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb[] =
{
THUMB16_INSN (0x4778), /* bx pc */
THUMB16_INSN (0x46c0), /* nop */
THUMB16_INSN (0xe7fd), /* b .-2 */
ARM_INSN (0xe59fc000), /* ldr ip, [pc, #0] */
ARM_INSN (0xe12fff1c), /* bx ip */
DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
@ -2635,7 +2642,7 @@ static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb[] =
static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm[] =
{
THUMB16_INSN (0x4778), /* bx pc */
THUMB16_INSN (0x46c0), /* nop */
THUMB16_INSN (0xe7fd), /* b .-2 */
ARM_INSN (0xe51ff004), /* ldr pc, [pc, #-4] */
DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
};
@ -2645,7 +2652,7 @@ static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm[] =
static const insn_sequence elf32_arm_stub_short_branch_v4t_thumb_arm[] =
{
THUMB16_INSN (0x4778), /* bx pc */
THUMB16_INSN (0x46c0), /* nop */
THUMB16_INSN (0xe7fd), /* b .-2 */
ARM_REL_INSN (0xea000000, -8), /* b (X-8) */
};
@ -2683,7 +2690,7 @@ static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb_pic[] =
static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm_pic[] =
{
THUMB16_INSN (0x4778), /* bx pc */
THUMB16_INSN (0x46c0), /* nop */
THUMB16_INSN (0xe7fd), /* b .-2 */
ARM_INSN (0xe59fc000), /* ldr ip, [pc, #0] */
ARM_INSN (0xe08cf00f), /* add pc, ip, pc */
DATA_WORD (0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X) */
@ -2707,7 +2714,7 @@ static const insn_sequence elf32_arm_stub_long_branch_thumb_only_pic[] =
static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb_pic[] =
{
THUMB16_INSN (0x4778), /* bx pc */
THUMB16_INSN (0x46c0), /* nop */
THUMB16_INSN (0xe7fd), /* b .-2 */
ARM_INSN (0xe59fc004), /* ldr ip, [pc, #4] */
ARM_INSN (0xe08fc00c), /* add ip, pc, ip */
ARM_INSN (0xe12fff1c), /* bx ip */
@ -2728,7 +2735,7 @@ static const insn_sequence elf32_arm_stub_long_branch_any_tls_pic[] =
static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_tls_pic[] =
{
THUMB16_INSN (0x4778), /* bx pc */
THUMB16_INSN (0x46c0), /* nop */
THUMB16_INSN (0xe7fd), /* b .-2 */
ARM_INSN (0xe59f1000), /* ldr r1, [pc, #0] */
ARM_INSN (0xe081f00f), /* add pc, r1, pc */
DATA_WORD (0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X) */

26
ld/ChangeLog
View File

@ -1,3 +1,29 @@
2019-08-20 Tamar Christina <tamar.christina@arm.com>
* 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.
2019-08-16 H.J. Lu <hongjiu.lu@intel.com>
PR ld/24905

2
ld/testsuite/ld-arm/cortex-a8-fix-b-plt.d
View File

@ -12,7 +12,7 @@ Disassembly of section \.plt:
8010: 00000ffc \.word 0x00000ffc
00008014 <bar@plt>:
8014: 4778 bx pc
8016: 46c0 nop ; \(mov r8, r8\)
8016: e7fd b.n .+ <.+>
8018: e28fc600 add ip, pc, #0, 12
801c: e28cca00 add ip, ip, #0, 20
8020: e5bcfff8 ldr pc, \[ip, #4088\]! ; 0xff8

2
ld/testsuite/ld-arm/cortex-a8-fix-b-rel-arm.d
View File

@ -79,5 +79,5 @@ Disassembly of section \.text:
00009010 <__targetfn_from_thumb>:
9010: 4778 bx pc
9012: 46c0 nop ; \(mov r8, r8\)
9012: e7fd b.n .+ <.+>
9014: eaffffb9 b 8f00 <targetfn>

2
ld/testsuite/ld-arm/cortex-a8-fix-bcc-plt.d
View File

@ -12,7 +12,7 @@ Disassembly of section \.plt:
8010: 00001004 \.word 0x00001004
00008014 <bar@plt>:
8014: 4778 bx pc
8016: 46c0 nop ; \(mov r8, r8\)
8016: e7fd b.n .+ <.+>
8018: e28fc600 add ip, pc, #0, 12
801c: e28cca01 add ip, ip, #4096 ; 0x1000
8020: e5bcf000 ldr pc, \[ip, #0\]!

2
ld/testsuite/ld-arm/farcall-cond-thumb-arm.d
View File

@ -9,7 +9,7 @@ Disassembly of section .text:
00058008 <__bar_from_thumb>:
58008: 4778 bx pc
5800a: 46c0 nop ; \(mov r8, r8\)
5800a: e7fd b.n .+ <.+>
5800c: ea02fffb b 118000 <bar>
Disassembly of section .foo:

4
ld/testsuite/ld-arm/farcall-mixed-app.d
View File

@ -14,7 +14,7 @@ Disassembly of section .plt:
.*: .*
.* <lib_func2@plt>:
.*: 4778 bx pc
.*: 46c0 nop ; \(mov r8, r8\)
.*: e7fd b.n .+ <.+>
.*: e28fc6.* add ip, pc, #.*
.*: e28cca.* add ip, ip, #.* ; 0x.*
.*: e5bcf.* ldr pc, \[ip, #.*\]!.*
@ -82,7 +82,7 @@ Disassembly of section .far_thumb:
.* <__lib_func2_from_thumb>:
.*: 4778 bx pc
.*: 46c0 nop ; \(mov r8, r8\)
.*: e7fd b.n .+ <.+>
.*: e51ff004 ldr pc, \[pc, #-4\] ; 2200018 <__lib_func2_from_thumb\+0x8>
.*: 000081e0 .word 0x000081e0
.*: 00000000 .word 0x00000000

4
ld/testsuite/ld-arm/farcall-mixed-app2.d
View File

@ -14,7 +14,7 @@ Disassembly of section .plt:
.*: .*
.* <lib_func2@plt>:
.*: 4778 bx pc
.*: 46c0 nop ; \(mov r8, r8\)
.*: e7fd b.n .+ <.+>
.*: e28fc6.* add ip, pc, #.*
.*: e28cca.* add ip, ip, #.* ; 0x.*
.*: e5bcf.* ldr pc, \[ip, #.*\]!.*
@ -56,7 +56,7 @@ Disassembly of section .mid_thumb:
.* <__lib_func2_from_thumb>:
.*: 4778 bx pc
.*: 46c0 nop ; \(mov r8, r8\)
.*: e7fd b.n .+ <.+>
.*: e51ff004 ldr pc, \[pc, #-4\] ; 10081e8 <__lib_func2_from_thumb\+0x8>
.*: 000081e0 .word 0x000081e0
.*: 00000000 .word 0x00000000

20
ld/testsuite/ld-arm/farcall-mixed-lib-v4t.d
View File

@ -13,25 +13,25 @@ Disassembly of section .plt:
.*: .* .word .*
.* <app_func@plt>:
.*: 4778 bx pc
.*: 46c0 nop ; \(mov r8, r8\)
.*: e7fd b.n .+ <.+>
.*: e28fc6.* add ip, pc, #.*
.*: e28cca.* add ip, ip, #.* ; 0x.*
.*: e5bcf.* ldr pc, \[ip, #.*\]! ; .*
.* <app_func_weak@plt>:
.*: 4778 bx pc
.*: 46c0 nop ; \(mov r8, r8\)
.*: e7fd b.n .+ <.+>
.*: e28fc6.* add ip, pc, #.*
.*: e28cca.* add ip, ip, #.* ; 0x.*
.*: e5bcf.* ldr pc, \[ip, #.*\]! ; 0x.*
.* <lib_func3@plt>:
.*: 4778 bx pc
.*: 46c0 nop ; \(mov r8, r8\)
.*: e7fd b.n .+ <.+>
.*: e28fc6.* add ip, pc, #.*
.*: e28cca.* add ip, ip, #.* ; 0x.*
.*: e5bcf.* ldr pc, \[ip, #.*\]! ; 0x.*
.* <lib_func4@plt>:
.*: 4778 bx pc
.*: 46c0 nop ; \(mov r8, r8\)
.*: e7fd b.n .+ <.+>
.*: e28fc6.* add ip, pc, #.*
.*: e28cca.* add ip, ip, #.* ; 0x.*
.*: e5bcf.* ldr pc, \[ip, #.*\]! ; 0x.*
@ -59,28 +59,28 @@ Disassembly of section .text:
.* <__app_func_from_thumb>:
.*: 4778 bx pc
.*: 46c0 nop ; \(mov r8, r8\)
.*: e7fd b.n .+ <.+>
.*: e59fc000 ldr ip, \[pc\] ; .* <__app_func_from_thumb\+0xc>
.*: e08cf00f add pc, ip, pc
.*: feffff.. .word 0xfeffff..
.* <__lib_func4_from_thumb>:
.*: 4778 bx pc
.*: 46c0 nop ; \(mov r8, r8\)
.*: e7fd b.n .+ <.+>
.*: e59fc000 ldr ip, \[pc\] ; .* <__lib_func4_from_thumb\+0xc>
.*: e08cf00f add pc, ip, pc
.*: feffff.. .word 0xfeffff..
.* <__app_func_weak_from_thumb>:
.*: 4778 bx pc
.*: 46c0 nop ; \(mov r8, r8\)
.*: e7fd b.n .+ <.+>
.*: e59fc000 ldr ip, \[pc\] ; .* <__app_func_weak_from_thumb\+0xc>
.*: e08cf00f add pc, ip, pc
.*: feffff.. .word 0xfeffff..
.* <__lib_func3_from_thumb>:
.*: 4778 bx pc
.*: 46c0 nop ; \(mov r8, r8\)
.*: e7fd b.n .+ <.+>
.*: e59fc000 ldr ip, \[pc\] ; .* <__lib_func3_from_thumb\+0xc>
.*: e08cf00f add pc, ip, pc
.*: feffff.. .word 0xfeffff..
@ -94,14 +94,14 @@ Disassembly of section .text:
.* <__app_func_weak_from_thumb>:
.*: 4778 bx pc
.*: 46c0 nop ; \(mov r8, r8\)
.*: e7fd b.n .+ <.+>
.*: e59fc000 ldr ip, \[pc\] ; .* <__app_func_weak_from_thumb\+0xc>
.*: e08cf00f add pc, ip, pc
.*: fdffff34 .word 0xfdffff34
.* <__app_func_from_thumb>:
.*: 4778 bx pc
.*: 46c0 nop ; \(mov r8, r8\)
.*: e7fd b.n .+ <.+>
.*: e59fc000 ldr ip, \[pc\] ; .* <__app_func_from_thumb\+0xc>
.*: e08cf00f add pc, ip, pc
.*: fdffff14 .word 0xfdffff14

2
ld/testsuite/ld-arm/farcall-thumb-arm-pic-veneer.d
View File

@ -9,7 +9,7 @@ Disassembly of section .text:
01f01018 <__bar_from_thumb>:
1f01018: 4778 bx pc
1f0101a: 46c0 nop ; \(mov r8, r8\)
1f0101a: e7fd b.n .+ <.+>
1f0101c: e59fc000 ldr ip, \[pc\] ; 1f01024 <__bar_from_thumb\+0xc>
1f01020: e08cf00f add pc, ip, pc
1f01024: 000fffec .word 0x000fffec

2
ld/testsuite/ld-arm/farcall-thumb-arm-short.d
View File

@ -9,7 +9,7 @@ Disassembly of section .text:
00001008 <__bar_from_thumb>:
1008: 4778 bx pc
100a: 46c0 nop ; \(mov r8, r8\)
100a: e7fd b.n .+ <.+>
100c: ea000400 b 2014 <bar>
Disassembly of section .foo:

4
ld/testsuite/ld-arm/farcall-thumb-arm.d
View File

@ -9,13 +9,13 @@ Disassembly of section .text:
01f01018 <__bar_from_thumb>:
1f01018: 4778 bx pc
1f0101a: 46c0 nop ; \(mov r8, r8\)
1f0101a: e7fd b.n .+ <.+>
1f0101c: e51ff004 ldr pc, \[pc, #-4\] ; 1f01020 <__bar_from_thumb\+0x8>
1f01020: 02001014 .word 0x02001014
01f01024 <__bar_from_thumb>:
1f01024: 4778 bx pc
1f01026: 46c0 nop ; \(mov r8, r8\)
1f01026: e7fd b.n .+ <.+>
1f01028: ea03fff9 b 2001014 <bar>
1f0102c: 00000000 andeq r0, r0, r0

2
ld/testsuite/ld-arm/farcall-thumb-thumb-pic-veneer.d
View File

@ -9,7 +9,7 @@ Disassembly of section .text:
00001008 <__bar_veneer>:
1008: 4778 bx pc
100a: 46c0 nop ; \(mov r8, r8\)
100a: e7fd b.n .+ <.+>
100c: e59fc004 ldr ip, \[pc, #4\] ; 1018 <__bar_veneer\+0x10>
1010: e08fc00c add ip, pc, ip
1014: e12fff1c bx ip

2
ld/testsuite/ld-arm/farcall-thumb-thumb.d
View File

@ -9,7 +9,7 @@ Disassembly of section .text:
00001008 <__bar_veneer>:
1008: 4778 bx pc
100a: 46c0 nop ; \(mov r8, r8\)
100a: e7fd b.n .+ <.+>
100c: e59fc000 ldr ip, \[pc\] ; 1014 <__bar_veneer\+0xc>
1010: e12fff1c bx ip
1014: 02001015 .word 0x02001015

2
ld/testsuite/ld-arm/fix-arm1176-on.d
View File

@ -9,7 +9,7 @@ Disassembly of section .foo:
[0-9a-f]+ <__func_to_branch_to_veneer>:
+[0-9a-f]+: 4778 bx pc
+[0-9a-f]+: 46c0 nop ; \(mov r8, r8\)
+[0-9a-f]+: e7fd b.n .+ <.+>
+[0-9a-f]+: e51ff004 ldr pc, \[pc, #-4\] ; 2001020 <__func_to_branch_to_veneer\+0x8>
+[0-9a-f]+: ........ .word 0x........
+[0-9a-f]+: 00000000 .word 0x00000000

32
ld/testsuite/ld-arm/ifunc-10.dd
View File

@ -18,7 +18,7 @@ Disassembly of section \.plt:
#------------------------------------------------------------------------------
00009014 <atf2@plt>:
9014: 4778 bx pc
9016: 46c0 nop ; \(mov r8, r8\)
9016: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ atf2's .plt entry
#------------------------------------------------------------------------------
@ -37,7 +37,7 @@ Disassembly of section \.plt:
#------------------------------------------------------------------------------
00009030 <ttf2@plt>:
9030: 4778 bx pc
9032: 46c0 nop ; \(mov r8, r8\)
9032: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ ttf2's .plt entry
#------------------------------------------------------------------------------
@ -49,7 +49,7 @@ Disassembly of section \.plt:
#------------------------------------------------------------------------------
00009040 <tbf2@plt>:
9040: 4778 bx pc
9042: 46c0 nop ; \(mov r8, r8\)
9042: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ tbf2's .plt entry
#------------------------------------------------------------------------------
@ -75,7 +75,7 @@ Disassembly of section \.plt:
#------------------------------------------------------------------------------
00009068 <abf4@plt>:
9068: 4778 bx pc
906a: 46c0 nop ; \(mov r8, r8\)
906a: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ abf4's .plt entry
#------------------------------------------------------------------------------
@ -87,7 +87,7 @@ Disassembly of section \.plt:
#------------------------------------------------------------------------------
00009078 <tbf4@plt>:
9078: 4778 bx pc
907a: 46c0 nop ; \(mov r8, r8\)
907a: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ tbf4's .plt entry
#------------------------------------------------------------------------------
@ -99,7 +99,7 @@ Disassembly of section \.plt:
#------------------------------------------------------------------------------
00009088 <ttf4@plt>:
9088: 4778 bx pc
908a: 46c0 nop ; \(mov r8, r8\)
908a: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ ttf4's .plt entry
#------------------------------------------------------------------------------
@ -111,7 +111,7 @@ Disassembly of section \.plt:
#------------------------------------------------------------------------------
00009098 <atf4@plt>:
9098: 4778 bx pc
909a: 46c0 nop ; \(mov r8, r8\)
909a: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ atf4's .plt entry
#------------------------------------------------------------------------------
@ -130,7 +130,7 @@ Disassembly of section \.plt:
#------------------------------------------------------------------------------
000090b4 <abf2@plt>:
90b4: 4778 bx pc
90b6: 46c0 nop ; \(mov r8, r8\)
90b6: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ abf2's .plt entry
#------------------------------------------------------------------------------
@ -151,7 +151,7 @@ Disassembly of section \.iplt:
#------ thumb entry to atf1's .iplt entry
#------------------------------------------------------------------------------
90d0: 4778 bx pc
90d2: 46c0 nop ; \(mov r8, r8\)
90d2: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ atf1's .iplt entry
#------------------------------------------------------------------------------
@ -162,7 +162,7 @@ Disassembly of section \.iplt:
#------ thumb entry to abf1's .iplt entry
#------------------------------------------------------------------------------
90e0: 4778 bx pc
90e2: 46c0 nop ; \(mov r8, r8\)
90e2: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ abf1's .iplt entry
#------------------------------------------------------------------------------
@ -179,7 +179,7 @@ Disassembly of section \.iplt:
#------ thumb entry to ttf1's .iplt entry
#------------------------------------------------------------------------------
90fc: 4778 bx pc
90fe: 46c0 nop ; \(mov r8, r8\)
90fe: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ ttf1's .iplt entry
#------------------------------------------------------------------------------
@ -190,7 +190,7 @@ Disassembly of section \.iplt:
#------ thumb entry to tbf1's .iplt entry
#------------------------------------------------------------------------------
910c: 4778 bx pc
910e: 46c0 nop ; \(mov r8, r8\)
910e: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ tbf1's .iplt entry
#------------------------------------------------------------------------------
@ -201,7 +201,7 @@ Disassembly of section \.iplt:
#------ thumb entry to atf3
#------------------------------------------------------------------------------
911c: 4778 bx pc
911e: 46c0 nop ; \(mov r8, r8\)
911e: e7fd b.n .+ <.+>
00009120 <atf3>:
9120: e28fc600 add ip, pc, #0, 12
@ -211,7 +211,7 @@ Disassembly of section \.iplt:
#------ thumb entry to abf3
#------------------------------------------------------------------------------
912c: 4778 bx pc
912e: 46c0 nop ; \(mov r8, r8\)
912e: e7fd b.n .+ <.+>
00009130 <abf3>:
9130: e28fc600 add ip, pc, #0, 12
@ -221,7 +221,7 @@ Disassembly of section \.iplt:
#------ thumb entry to ttf3
#------------------------------------------------------------------------------
913c: 4778 bx pc
913e: 46c0 nop ; \(mov r8, r8\)
913e: e7fd b.n .+ <.+>
00009140 <ttf3>:
9140: e28fc600 add ip, pc, #0, 12
@ -231,7 +231,7 @@ Disassembly of section \.iplt:
#------ thumb entry to tbf3
#------------------------------------------------------------------------------
914c: 4778 bx pc
914e: 46c0 nop ; \(mov r8, r8\)
914e: e7fd b.n .+ <.+>
00009150 <tbf3>:
9150: e28fc600 add ip, pc, #0, 12

8
ld/testsuite/ld-arm/ifunc-2.dd
View File

@ -21,7 +21,7 @@ Disassembly of section \.iplt:
#------ thumb entry to f3's .iplt entry
#------------------------------------------------------------------------------
9018: 4778 bx pc
901a: 46c0 nop ; \(mov r8, r8\)
901a: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ f3's .iplt entry
#------------------------------------------------------------------------------
@ -32,7 +32,7 @@ Disassembly of section \.iplt:
#------ thumb entry to f4's .iplt entry
#------------------------------------------------------------------------------
9028: 4778 bx pc
902a: 46c0 nop ; \(mov r8, r8\)
902a: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ f4's .iplt entry
#------------------------------------------------------------------------------
@ -43,7 +43,7 @@ Disassembly of section \.iplt:
#------ thumb entry to f7
#------------------------------------------------------------------------------
9038: 4778 bx pc
903a: 46c0 nop ; \(mov r8, r8\)
903a: e7fd b.n .+ <.+>
0000903c <f7>:
903c: e28fc600 add ip, pc, #0, 12
@ -58,7 +58,7 @@ Disassembly of section \.iplt:
#------ thumb entry to f8
#------------------------------------------------------------------------------
9054: 4778 bx pc
9056: 46c0 nop ; \(mov r8, r8\)
9056: e7fd b.n .+ <.+>
00009058 <f8>:
9058: e28fc600 add ip, pc, #0, 12

32
ld/testsuite/ld-arm/ifunc-4.dd
View File

@ -18,7 +18,7 @@ Disassembly of section \.plt:
#------------------------------------------------------------------------------
00009014 <atf2@plt>:
9014: 4778 bx pc
9016: 46c0 nop ; \(mov r8, r8\)
9016: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ atf2's .plt entry
#------------------------------------------------------------------------------
@ -30,7 +30,7 @@ Disassembly of section \.plt:
#------------------------------------------------------------------------------
00009024 <ttf2@plt>:
9024: 4778 bx pc
9026: 46c0 nop ; \(mov r8, r8\)
9026: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ ttf2's .plt entry
#------------------------------------------------------------------------------
@ -42,7 +42,7 @@ Disassembly of section \.plt:
#------------------------------------------------------------------------------
00009034 <tbf2@plt>:
9034: 4778 bx pc
9036: 46c0 nop ; \(mov r8, r8\)
9036: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ tbf2's .plt entry
#------------------------------------------------------------------------------
@ -68,7 +68,7 @@ Disassembly of section \.plt:
#------------------------------------------------------------------------------
0000905c <abf2@plt>:
905c: 4778 bx pc
905e: 46c0 nop ; \(mov r8, r8\)
905e: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ abf2's .plt entry
#------------------------------------------------------------------------------
@ -89,7 +89,7 @@ Disassembly of section \.iplt:
#------ thumb entry to atf1's .iplt entry
#------------------------------------------------------------------------------
9078: 4778 bx pc
907a: 46c0 nop ; \(mov r8, r8\)
907a: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ atf1's .iplt entry
#------------------------------------------------------------------------------
@ -100,7 +100,7 @@ Disassembly of section \.iplt:
#------ thumb entry to abf1's .iplt entry
#------------------------------------------------------------------------------
9088: 4778 bx pc
908a: 46c0 nop ; \(mov r8, r8\)
908a: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ abf1's .iplt entry
#------------------------------------------------------------------------------
@ -117,7 +117,7 @@ Disassembly of section \.iplt:
#------ thumb entry to ttf1's .iplt entry
#------------------------------------------------------------------------------
90a4: 4778 bx pc
90a6: 46c0 nop ; \(mov r8, r8\)
90a6: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ ttf1's .iplt entry
#------------------------------------------------------------------------------
@ -128,7 +128,7 @@ Disassembly of section \.iplt:
#------ thumb entry to tbf1's .iplt entry
#------------------------------------------------------------------------------
90b4: 4778 bx pc
90b6: 46c0 nop ; \(mov r8, r8\)
90b6: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ tbf1's .iplt entry
#------------------------------------------------------------------------------
@ -145,7 +145,7 @@ Disassembly of section \.iplt:
#------ thumb entry to atf3's .iplt entry
#------------------------------------------------------------------------------
90d0: 4778 bx pc
90d2: 46c0 nop ; \(mov r8, r8\)
90d2: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ atf3's .iplt entry
#------------------------------------------------------------------------------
@ -156,7 +156,7 @@ Disassembly of section \.iplt:
#------ thumb entry to abf3's .iplt entry
#------------------------------------------------------------------------------
90e0: 4778 bx pc
90e2: 46c0 nop ; \(mov r8, r8\)
90e2: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ abf3's .iplt entry
#------------------------------------------------------------------------------
@ -167,7 +167,7 @@ Disassembly of section \.iplt:
#------ thumb entry to ttf3's .iplt entry
#------------------------------------------------------------------------------
90f0: 4778 bx pc
90f2: 46c0 nop ; \(mov r8, r8\)
90f2: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ ttf3's .iplt entry
#------------------------------------------------------------------------------
@ -178,7 +178,7 @@ Disassembly of section \.iplt:
#------ thumb entry to tbf3's .iplt entry
#------------------------------------------------------------------------------
9100: 4778 bx pc
9102: 46c0 nop ; \(mov r8, r8\)
9102: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ tbf3's .iplt entry
#------------------------------------------------------------------------------
@ -195,7 +195,7 @@ Disassembly of section \.iplt:
#------ thumb entry to abf4's .iplt entry
#------------------------------------------------------------------------------
911c: 4778 bx pc
911e: 46c0 nop ; \(mov r8, r8\)
911e: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ abf4's .iplt entry
#------------------------------------------------------------------------------
@ -206,7 +206,7 @@ Disassembly of section \.iplt:
#------ thumb entry to tbf4's .iplt entry
#------------------------------------------------------------------------------
912c: 4778 bx pc
912e: 46c0 nop ; \(mov r8, r8\)
912e: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ tbf4's .iplt entry
#------------------------------------------------------------------------------
@ -217,7 +217,7 @@ Disassembly of section \.iplt:
#------ thumb entry to ttf4's .iplt entry
#------------------------------------------------------------------------------
913c: 4778 bx pc
913e: 46c0 nop ; \(mov r8, r8\)
913e: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ ttf4's .iplt entry
#------------------------------------------------------------------------------
@ -234,7 +234,7 @@ Disassembly of section \.iplt:
#------ thumb entry to atf4's .iplt entry
#------------------------------------------------------------------------------
9158: 4778 bx pc
915a: 46c0 nop ; \(mov r8, r8\)
915a: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ atf4's .iplt entry
#------------------------------------------------------------------------------

4
ld/testsuite/ld-arm/ifunc-6.dd
View File

@ -9,7 +9,7 @@ Disassembly of section \.iplt:
#------ thumb entry to f3's .iplt entry
#------------------------------------------------------------------------------
9000: 4778 bx pc
9002: 46c0 nop ; \(mov r8, r8\)
9002: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ f3's .iplt entry
#------------------------------------------------------------------------------
@ -26,7 +26,7 @@ Disassembly of section \.iplt:
#------ thumb entry to f4's .iplt entry
#------------------------------------------------------------------------------
901c: 4778 bx pc
901e: 46c0 nop ; \(mov r8, r8\)
901e: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ f4's .iplt entry
#------------------------------------------------------------------------------

16
ld/testsuite/ld-arm/ifunc-8.dd
View File

@ -15,7 +15,7 @@ Disassembly of section \.iplt:
#------ thumb entry to atf1's .iplt entry
#------------------------------------------------------------------------------
900c: 4778 bx pc
900e: 46c0 nop ; \(mov r8, r8\)
900e: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ atf1's .iplt entry
#------------------------------------------------------------------------------
@ -26,7 +26,7 @@ Disassembly of section \.iplt:
#------ thumb entry to abf1's .iplt entry
#------------------------------------------------------------------------------
901c: 4778 bx pc
901e: 46c0 nop ; \(mov r8, r8\)
901e: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ abf1's .iplt entry
#------------------------------------------------------------------------------
@ -43,7 +43,7 @@ Disassembly of section \.iplt:
#------ thumb entry to ttf1's .iplt entry
#------------------------------------------------------------------------------
9038: 4778 bx pc
903a: 46c0 nop ; \(mov r8, r8\)
903a: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ ttf1's .iplt entry
#------------------------------------------------------------------------------
@ -54,7 +54,7 @@ Disassembly of section \.iplt:
#------ thumb entry to tbf1's .iplt entry
#------------------------------------------------------------------------------
9048: 4778 bx pc
904a: 46c0 nop ; \(mov r8, r8\)
904a: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ tbf1's .iplt entry
#------------------------------------------------------------------------------
@ -65,7 +65,7 @@ Disassembly of section \.iplt:
#------ thumb entry to atf3's .iplt entry
#------------------------------------------------------------------------------
9058: 4778 bx pc
905a: 46c0 nop ; \(mov r8, r8\)
905a: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ atf3's .iplt entry
#------------------------------------------------------------------------------
@ -76,7 +76,7 @@ Disassembly of section \.iplt:
#------ thumb entry to abf3's .iplt entry
#------------------------------------------------------------------------------
9068: 4778 bx pc
906a: 46c0 nop ; \(mov r8, r8\)
906a: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ abf3's .iplt entry
#------------------------------------------------------------------------------
@ -87,7 +87,7 @@ Disassembly of section \.iplt:
#------ thumb entry to ttf3's .iplt entry
#------------------------------------------------------------------------------
9078: 4778 bx pc
907a: 46c0 nop ; \(mov r8, r8\)
907a: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ ttf3's .iplt entry
#------------------------------------------------------------------------------
@ -98,7 +98,7 @@ Disassembly of section \.iplt:
#------ thumb entry to tbf3's .iplt entry
#------------------------------------------------------------------------------
9088: 4778 bx pc
908a: 46c0 nop ; \(mov r8, r8\)
908a: e7fd b.n .+ <.+>
#------------------------------------------------------------------------------
#------ tbf3's .iplt entry
#------------------------------------------------------------------------------

2
ld/testsuite/ld-arm/jump-reloc-veneers-long.d
View File

@ -16,7 +16,7 @@ Disassembly of section .text:
000080.. <[^>]*>:
80..: 4778 bx pc
80..: 46c0 nop ; \(mov r8, r8\)
80..: e7fd b.n .+ <.+>
80..: e59fc000 ldr ip, \[pc\] ; 80.. <__dest_veneer\+0xc>
80..: e12fff1c bx ip
80..: 09000001 .word 0x09000001

2
ld/testsuite/ld-arm/mixed-app.d
View File

@ -14,7 +14,7 @@ Disassembly of section .plt:
.*: .*
.* <lib_func2@plt>:
.*: 4778 bx pc
.*: 46c0 nop ; \(mov r8, r8\)
.*: e7fd b.n .+ <.+>
.*: e28fc6.* add ip, pc, #.*
.*: e28cca.* add ip, ip, #.* ; 0x.*
.*: e5bcf.* ldr pc, \[ip, #.*\]!.*

2
ld/testsuite/ld-arm/thumb2-b-interwork.d
View File

@ -11,6 +11,6 @@ Disassembly of section .text:
[0-9a-f]+ <__bar_from_thumb>:
+[0-9a-f]+: 4778 bx pc
+[0-9a-f]+: 46c0 nop ; \(mov r8, r8\)
+[0-9a-f]+: e7fd b.n .+ <.+>
+[0-9a-f]+: eafffffc b [0-9a-f]+ <bar>

2
ld/testsuite/ld-arm/tls-longplt.d
View File

@ -58,7 +58,7 @@ Disassembly of section .foo:
04001038 <__unnamed_veneer>:
4001038: 4778 bx pc
400103a: 46c0 nop ; .*
400103a: e7fd b.n .+ <.+>
400103c: e51ff004 ldr pc, \[pc, #-4\] ; .*
4001040: 000081b0 .word 0x000081b0
4001044: 00000000 .word 0x00000000

4
ld/testsuite/ld-arm/tls-thumb1.d
View File

@ -38,7 +38,7 @@ Disassembly of section .text:
000081a0 <__unnamed_veneer>:
.*: 4778 bx pc
.*: 46c0 nop ; .*
.*: e7fd b.n .+ <.+>
.*: e59f1000 ldr r1, \[pc\] ; .*
.*: e081f00f add pc, r1, pc
.*: ffffffa0 .word 0xffffffa0
@ -67,7 +67,7 @@ Disassembly of section .foo:
0400103c <__unnamed_veneer>:
.*: 4778 bx pc
.*: 46c0 nop ; .*
.*: e7fd b.n .+ <.+>
.*: e59f1000 ldr r1, \[pc\] ; .*
.*: e081f00f add pc, r1, pc
.*: fc007104 .word 0xfc007104