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Add support for Thumb-2 long branch veneers
2016-06-17 Thomas Preud'homme <thomas.preudhomme@arm.com> Tony Wang <tony.wang@arm.com> bfd/ * elf32-arm.c (elf32_arm_stub_long_branch_thumb2_only): Define stub sequence. (stub_long_branch_thumb2_only): Define stub. (arm_stub_is_thumb): Add case for arm_stub_long_branch_thumb2_only. (arm_stub_long_branch_thumb2_only): Likewise. (arm_type_of_stub): Use arm_stub_long_branch_thumb2_only for Thumb-2 capable targets. ld/ * testsuite/ld-arm/arm-elf.exp (Thumb-Thumb farcall M profile): Assemble for ARMv6-M. (Thumb2-Thumb2 farcall M profile): New testcase. * testsuite/ld-arm/farcall-thumb2-thumb2-m.d: New file. * testsuite/ld-arm/jump-reloc-veneers-cond-long-backward.d: Update to reflect the use of Thumb-2 veneers for Thumb-2 capable targets. * testsuite/ld-arm/jump-reloc-veneers-cond-long.d: Likewise.
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Thomas Preud'homme
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80c135e554
@ -1,3 +1,14 @@
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2016-06-17 Thomas Preud'homme <thomas.preudhomme@arm.com>
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Tony Wang <tony.wang@arm.com>
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* elf32-arm.c (elf32_arm_stub_long_branch_thumb2_only): Define stub
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sequence.
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(stub_long_branch_thumb2_only): Define stub.
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(arm_stub_is_thumb): Add case for arm_stub_long_branch_thumb2_only.
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(arm_stub_long_branch_thumb2_only): Likewise.
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(arm_type_of_stub): Use arm_stub_long_branch_thumb2_only for Thumb-2
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capable targets.
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2016-06-17 Jose E. Marchesi <jose.marchesi@oracle.com>
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* archures.c (bfd_mach_sparc_v8plusc): Define.
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@ -2402,6 +2402,13 @@ static const insn_sequence elf32_arm_stub_long_branch_thumb_only[] =
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DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
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};
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/* Thumb -> Thumb long branch stub in thumb2 encoding. Used on armv7. */
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static const insn_sequence elf32_arm_stub_long_branch_thumb2_only[] =
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{
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THUMB32_INSN (0xf85ff000), /* ldr.w pc, [pc, #-0] */
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DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(x) */
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};
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/* V4T Thumb -> Thumb long branch stub. Using the stack is not
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allowed. */
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static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb[] =
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@ -2625,7 +2632,8 @@ static const insn_sequence elf32_arm_stub_a8_veneer_blx[] =
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DEF_STUB(a8_veneer_b_cond) \
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DEF_STUB(a8_veneer_b) \
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DEF_STUB(a8_veneer_bl) \
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DEF_STUB(a8_veneer_blx)
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DEF_STUB(a8_veneer_blx) \
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DEF_STUB(long_branch_thumb2_only) \
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#define DEF_STUB(x) arm_stub_##x,
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enum elf32_arm_stub_type
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@ -3781,6 +3789,7 @@ arm_stub_is_thumb (enum elf32_arm_stub_type stub_type)
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switch (stub_type)
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{
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case arm_stub_long_branch_thumb_only:
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case arm_stub_long_branch_thumb2_only:
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case arm_stub_long_branch_v4t_thumb_arm:
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case arm_stub_short_branch_v4t_thumb_arm:
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case arm_stub_long_branch_v4t_thumb_arm_pic:
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@ -3945,7 +3954,8 @@ arm_type_of_stub (struct bfd_link_info *info,
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/* PIC stub. */
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? arm_stub_long_branch_thumb_only_pic
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/* non-PIC stub. */
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: arm_stub_long_branch_thumb_only;
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: (thumb2 ? arm_stub_long_branch_thumb2_only
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: arm_stub_long_branch_thumb_only);
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}
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}
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else
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@ -4418,6 +4428,7 @@ arm_stub_required_alignment (enum elf32_arm_stub_type stub_type)
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case arm_stub_long_branch_any_any:
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case arm_stub_long_branch_v4t_arm_thumb:
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case arm_stub_long_branch_thumb_only:
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case arm_stub_long_branch_thumb2_only:
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case arm_stub_long_branch_v4t_thumb_thumb:
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case arm_stub_long_branch_v4t_thumb_arm:
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case arm_stub_short_branch_v4t_thumb_arm:
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11
ld/ChangeLog
11
ld/ChangeLog
@ -1,3 +1,14 @@
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2016-06-17 Thomas Preud'homme <thomas.preudhomme@arm.com>
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Tony Wang <tony.wang@arm.com>
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* testsuite/ld-arm/arm-elf.exp (Thumb-Thumb farcall M profile):
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Assemble for ARMv6-M.
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(Thumb2-Thumb2 farcall M profile): New testcase.
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* testsuite/ld-arm/farcall-thumb2-thumb2-m.d: New file.
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* testsuite/ld-arm/jump-reloc-veneers-cond-long-backward.d: Update to
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reflect the use of Thumb-2 veneers for Thumb-2 capable targets.
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* testsuite/ld-arm/jump-reloc-veneers-cond-long.d: Likewise.
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2016-06-16 H.J. Lu <hongjiu.lu@intel.com>
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* testsuite/ld-i386/i386.exp: Run pr19636-2e-nacl.
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@ -474,9 +474,12 @@ set armeabitests_nonacl {
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{"Thumb-Thumb farcall with BLX" "--no-fix-arm1176 -Ttext 0x1000 --section-start .foo=0x2001014" "" "-march=armv5t" {farcall-thumb-thumb.s}
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{{objdump -d farcall-thumb-thumb-blx.d}}
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"farcall-thumb-thumb-blx"}
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{"Thumb-Thumb farcall M profile" "-Ttext 0x1000 --section-start .foo=0x2001014" "" "-march=armv7-m" {farcall-thumb-thumb.s}
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{"Thumb-Thumb farcall M profile" "-Ttext 0x1000 --section-start .foo=0x2001014" "" "-march=armv6-m" {farcall-thumb-thumb.s}
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{{objdump -d farcall-thumb-thumb-m.d}}
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"farcall-thumb-thumb-m"}
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{"Thumb2-Thumb2 farcall M profile" "-Ttext 0x1000 --section-start .foo=0x2001014" "" "-march=armv7-m" {farcall-thumb-thumb.s}
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{{objdump -d farcall-thumb2-thumb2-m.d}}
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"farcall-thumb2-thumb2-m"}
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{"Thumb-Thumb farcall v8-M Baseline" "-Ttext 0x1000 --section-start .foo=0x2001014" "" "-march=armv8-m.base" {farcall-thumb-thumb.s}
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{{objdump -d farcall-thumb-thumb-m.d}}
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"farcall-thumb-thumb-v8-m-base"}
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17
ld/testsuite/ld-arm/farcall-thumb2-thumb2-m.d
Normal file
17
ld/testsuite/ld-arm/farcall-thumb2-thumb2-m.d
Normal file
@ -0,0 +1,17 @@
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.*: file format .*
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Disassembly of section .text:
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00001000 <_start>:
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1000: f000 f802 bl 1008 <__bar_veneer>
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1004: 0000 movs r0, r0
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\.\.\.
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00001008 <__bar_veneer>:
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1008: f85f f000 ldr.w pc, \[pc\] ; 100c <__bar_veneer\+0x4>
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100c: 02001015 .word 0x02001015
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Disassembly of section .foo:
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02001014 <bar>:
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2001014: 4770 bx lr
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@ -15,10 +15,5 @@ Disassembly of section .text:
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...
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001080.. <[^>]*>:
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1080..: b401 push {r0}
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1080..: 4802 ldr r0, \[pc, #8\] ; \(108014 <__dest_veneer\+0xc>\)
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1080..: 4684 mov ip, r0
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1080..: bc01 pop {r0}
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1080..: 4760 bx ip
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1080..: bf00 nop
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1080..: f85f f000 ldr.w pc, \[pc\] ; 10800c <__dest_veneer\+0x4>
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1080..: 00008003 .word 0x00008003
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@ -15,10 +15,5 @@ Disassembly of section .text:
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...
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000080.. <[^>]*>:
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80..: b401 push {r0}
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80..: 4802 ldr r0, \[pc, #8\] ; \(80.. <__dest_veneer\+0xc>\)
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80..: 4684 mov ip, r0
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80..: bc01 pop {r0}
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80..: 4760 bx ip
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80..: bf00 nop
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80..: f85f f000 ldr.w pc, \[pc\] ; 800c <__dest_veneer\+0x4>
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80..: 00108005 .word 0x00108005
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