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* elf32-arm.c (cortex_a8_erratum_scan): If the stub is a Thumb
	branch to a PLT entry, redirect it to the PLT's Thumb entry point.

ld/testsuite/
	* ld-arm/cortex-a8-fix-b-plt.s, ld-arm/cortex-a8-fix-b-plt.d,
	ld-arm/cortex-a8-fix-bcc-plt.s, ld-arm/cortex-a8-fix-bcc-plt.d,
	ld-arm/cortex-a8-fix-bl-plt.s, ld-arm/cortex-a8-fix-bl-plt.d,
	ld-arm/cortex-a8-fix-blx-plt.s, ld-arm/cortex-a8-fix-blx-plt.d,
	ld-arm/cortex-a8-fix-plt.ld: New tests.
	* ld-arm/arm-elf.exp: Run them.
This commit is contained in:
Richard Sandiford
2011-05-06 10:21:32 +00:00
parent 1342dcfc82
commit 7d24e6a65a
13 changed files with 217 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
bfd/ChangeLog
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@ -1,3 +1,8 @@
2011-05-06 Richard Sandiford <richard.sandiford@linaro.org>
* elf32-arm.c (cortex_a8_erratum_scan): If the stub is a Thumb
branch to a PLT entry, redirect it to the PLT's Thumb entry point.
2011-05-05 Bernd Schmidt <bernds@codesourcery.com> 2011-05-05 Bernd Schmidt <bernds@codesourcery.com>
* elf32-tic6x.c (elf32_tic6x_final_link): New function. * elf32-tic6x.c (elf32_tic6x_final_link): New function.

8
bfd/elf32-arm.c
View File

@ -4556,6 +4556,7 @@ cortex_a8_erratum_scan (bfd *input_bfd,
bfd_vma target; bfd_vma target;
enum elf32_arm_stub_type stub_type = arm_stub_none; enum elf32_arm_stub_type stub_type = arm_stub_none;
struct a8_erratum_reloc key, *found; struct a8_erratum_reloc key, *found;
bfd_boolean use_plt = FALSE;
key.from = base_vma + i; key.from = base_vma + i;
found = (struct a8_erratum_reloc *) found = (struct a8_erratum_reloc *)
@ -4567,7 +4568,6 @@ cortex_a8_erratum_scan (bfd *input_bfd,
{ {
char *error_message = NULL; char *error_message = NULL;
struct elf_link_hash_entry *entry; struct elf_link_hash_entry *entry;
bfd_boolean use_plt = FALSE;
/* We don't care about the error returned from this /* We don't care about the error returned from this
function, only if there is glue or not. */ function, only if there is glue or not. */
@ -4671,6 +4671,12 @@ cortex_a8_erratum_scan (bfd *input_bfd,
offset = offset =
(bfd_signed_vma) (found->destination - pc_for_insn); (bfd_signed_vma) (found->destination - pc_for_insn);
/* If the stub will use a Thumb-mode branch to a
PLT target, redirect it to the preceding Thumb
entry point. */
if (stub_type != arm_stub_a8_veneer_blx && use_plt)
offset -= PLT_THUMB_STUB_SIZE;
target = pc_for_insn + offset; target = pc_for_insn + offset;
/* The BLX stub is ARM-mode code. Adjust the offset to /* The BLX stub is ARM-mode code. Adjust the offset to

9
ld/testsuite/ChangeLog
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@ -1,3 +1,12 @@
2011-05-06 Richard Sandiford <richard.sandiford@linaro.org>
* ld-arm/cortex-a8-fix-b-plt.s, ld-arm/cortex-a8-fix-b-plt.d,
ld-arm/cortex-a8-fix-bcc-plt.s, ld-arm/cortex-a8-fix-bcc-plt.d,
ld-arm/cortex-a8-fix-bl-plt.s, ld-arm/cortex-a8-fix-bl-plt.d,
ld-arm/cortex-a8-fix-blx-plt.s, ld-arm/cortex-a8-fix-blx-plt.d,
ld-arm/cortex-a8-fix-plt.ld: New tests.
* ld-arm/arm-elf.exp: Run them.
2011-05-05 Bernd Schmidt <bernds@codesourcery.com> 2011-05-05 Bernd Schmidt <bernds@codesourcery.com>
* ld-tic6x/shared-nopic.d: New test. * ld-tic6x/shared-nopic.d: New test.

20
ld/testsuite/ld-arm/arm-elf.exp
View File

@ -210,18 +210,38 @@ set armelftests {
"-EL -Ttext=0x8f00 --fix-cortex-a8" "-EL" {cortex-a8-fix-b.s} "-EL -Ttext=0x8f00 --fix-cortex-a8" "-EL" {cortex-a8-fix-b.s}
{{objdump -dr cortex-a8-fix-b.d}} {{objdump -dr cortex-a8-fix-b.d}}
"cortex-a8-fix-b"} "cortex-a8-fix-b"}
{"Cortex-A8 erratum fix, b.w to PLT"
"-EL -Tcortex-a8-fix-plt.ld --fix-cortex-a8 -shared" "-EL"
{cortex-a8-fix-b-plt.s}
{{objdump -dr cortex-a8-fix-b-plt.d}}
"cortex-a8-fix-b-plt"}
{"Cortex-A8 erratum fix, bl.w" {"Cortex-A8 erratum fix, bl.w"
"-EL -Ttext=0x8f00 --fix-cortex-a8" "-EL" {cortex-a8-fix-bl.s} "-EL -Ttext=0x8f00 --fix-cortex-a8" "-EL" {cortex-a8-fix-bl.s}
{{objdump -dr cortex-a8-fix-bl.d}} {{objdump -dr cortex-a8-fix-bl.d}}
"cortex-a8-fix-bl"} "cortex-a8-fix-bl"}
{"Cortex-A8 erratum fix, bl.w to PLT"
"-EL -Tcortex-a8-fix-plt.ld --fix-cortex-a8 -shared" "-EL"
{cortex-a8-fix-bl-plt.s}
{{objdump -dr cortex-a8-fix-bl-plt.d}}
"cortex-a8-fix-bl-plt"}
{"Cortex-A8 erratum fix, bcc.w" {"Cortex-A8 erratum fix, bcc.w"
"-EL -Ttext=0x8f00 --fix-cortex-a8" "-EL" {cortex-a8-fix-bcc.s} "-EL -Ttext=0x8f00 --fix-cortex-a8" "-EL" {cortex-a8-fix-bcc.s}
{{objdump -dr cortex-a8-fix-bcc.d}} {{objdump -dr cortex-a8-fix-bcc.d}}
"cortex-a8-fix-bcc"} "cortex-a8-fix-bcc"}
{"Cortex-A8 erratum fix, bcc.w to PLT"
"-EL -Tcortex-a8-fix-plt.ld --fix-cortex-a8 -shared" "-EL"
{cortex-a8-fix-bcc-plt.s}
{{objdump -dr cortex-a8-fix-bcc-plt.d}}
"cortex-a8-fix-bcc-plt"}
{"Cortex-A8 erratum fix, blx.w" {"Cortex-A8 erratum fix, blx.w"
"-EL -Ttext=0x8f00 --fix-cortex-a8" "-EL" {cortex-a8-fix-blx.s} "-EL -Ttext=0x8f00 --fix-cortex-a8" "-EL" {cortex-a8-fix-blx.s}
{{objdump -dr cortex-a8-fix-blx.d}} {{objdump -dr cortex-a8-fix-blx.d}}
"cortex-a8-fix-blx"} "cortex-a8-fix-blx"}
{"Cortex-A8 erratum fix, blx.w to PLT"
"-EL -Tcortex-a8-fix-plt.ld --fix-cortex-a8 -shared" "-EL"
{cortex-a8-fix-blx-plt.s}
{{objdump -dr cortex-a8-fix-blx-plt.d}}
"cortex-a8-fix-blx-plt"}
{"Cortex-A8 erratum fix, relocate b.w to ARM" {"Cortex-A8 erratum fix, relocate b.w to ARM"
"-EL -Ttext=0x8f00 --fix-cortex-a8" "-EL" {cortex-a8-arm-target.s cortex-a8-fix-b-rel.s} "-EL -Ttext=0x8f00 --fix-cortex-a8" "-EL" {cortex-a8-arm-target.s cortex-a8-fix-b-rel.s}
{{objdump -dr cortex-a8-fix-b-rel-arm.d}} {{objdump -dr cortex-a8-fix-b-rel-arm.d}}

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ld/testsuite/ld-arm/cortex-a8-fix-b-plt.d Normal file
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@ -0,0 +1,30 @@
.*
Disassembly of section \.plt:
00008000 <\.plt>:
8000: e52de004 push {lr} ; \(str lr, \[sp, #-4\]!\)
8004: e59fe004 ldr lr, \[pc, #4\] ; 8010 <foo-0xfe0>
8008: e08fe00e add lr, pc, lr
800c: e5bef008 ldr pc, \[lr, #8\]!
8010: 00000ffc \.word 0x00000ffc
8014: 4778 bx pc
8016: 46c0 nop ; \(mov r8, r8\)
8018: e28fc600 add ip, pc, #0
801c: e28cca00 add ip, ip, #0
8020: e5bcfff8 ldr pc, \[ip, #4088\]! ; 0xff8
Disassembly of section \.text:
00008ff0 <foo>:
8ff0: 46c0 nop ; \(mov r8, r8\)
8ff2: f240 0000 movw r0, #0
8ff6: f240 0000 movw r0, #0
8ffa: f240 0000 movw r0, #0
8ffe: f000 b803 b\.w 9008 <foo\+0x18>
9002: 0000 movs r0, r0
9004: 0000 movs r0, r0
9006: 0000 movs r0, r0
9008: f7ff b804 b\.w 8014 <foo-0xfdc>

10
ld/testsuite/ld-arm/cortex-a8-fix-b-plt.s Normal file
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@ -0,0 +1,10 @@
.syntax unified
.globl foo
.type foo,%function
.thumb_func
foo:
nop @ 0x00
movw r0,#0 @ 0x02
movw r0,#0 @ 0x06
movw r0,#0 @ 0x0a
b.w bar(PLT) @ 0x0e

32
ld/testsuite/ld-arm/cortex-a8-fix-bcc-plt.d Normal file
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@ -0,0 +1,32 @@
.*
Disassembly of section \.plt:
00008000 <\.plt>:
8000: e52de004 push {lr} ; \(str lr, \[sp, #-4\]!\)
8004: e59fe004 ldr lr, \[pc, #4\] ; 8010 <foo-0xfe0>
8008: e08fe00e add lr, pc, lr
800c: e5bef008 ldr pc, \[lr, #8\]!
8010: 00001004 \.word 0x00001004
8014: 4778 bx pc
8016: 46c0 nop ; \(mov r8, r8\)
8018: e28fc600 add ip, pc, #0
801c: e28cca01 add ip, ip, #4096 ; 0x1000
8020: e5bcf000 ldr pc, \[ip\]!
Disassembly of section \.text:
00008ff0 <foo>:
8ff0: 46c0 nop ; \(mov r8, r8\)
8ff2: f240 0000 movw r0, #0
8ff6: f240 0000 movw r0, #0
8ffa: f240 0000 movw r0, #0
8ffe: f000 b803 b\.w 9008 <foo\+0x18>
9002: 0000 movs r0, r0
9004: 0000 movs r0, r0
9006: 0000 movs r0, r0
9008: d001 beq\.n 900e <foo\+0x1e>
900a: f7ff bffa b\.w 9002 <foo\+0x12>
900e: f7ff b801 b\.w 8014 <foo-0xfdc>

10
ld/testsuite/ld-arm/cortex-a8-fix-bcc-plt.s Normal file
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@ -0,0 +1,10 @@
.syntax unified
.globl foo
.type foo,%function
.thumb_func
foo:
nop @ 0x00
movw r0,#0 @ 0x02
movw r0,#0 @ 0x06
movw r0,#0 @ 0x0a
beq.w bar(PLT) @ 0x0e

28
ld/testsuite/ld-arm/cortex-a8-fix-bl-plt.d Normal file
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@ -0,0 +1,28 @@
.*
Disassembly of section \.plt:
00008000 <\.plt>:
8000: e52de004 push {lr} ; \(str lr, \[sp, #-4\]!\)
8004: e59fe004 ldr lr, \[pc, #4\] ; 8010 <foo-0xfe0>
8008: e08fe00e add lr, pc, lr
800c: e5bef008 ldr pc, \[lr, #8\]!
8010: 00000ffc \.word 0x00000ffc
8014: e28fc600 add ip, pc, #0
8018: e28cca00 add ip, ip, #0
801c: e5bcfffc ldr pc, \[ip, #4092\]! ; 0xffc
Disassembly of section \.text:
00008ff0 <foo>:
8ff0: 46c0 nop ; \(mov r8, r8\)
8ff2: f240 0000 movw r0, #0
8ff6: f240 0000 movw r0, #0
8ffa: f240 0000 movw r0, #0
8ffe: f000 e804 blx 9008 <foo\+0x18>
9002: 0000 movs r0, r0
9004: 0000 movs r0, r0
9006: 0000 movs r0, r0
9008: eafffc01 b 8014 <foo-0xfdc>

10
ld/testsuite/ld-arm/cortex-a8-fix-bl-plt.s Normal file
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@ -0,0 +1,10 @@
.syntax unified
.globl foo
.type foo,%function
.thumb_func
foo:
nop @ 0x00
movw r0,#0 @ 0x02
movw r0,#0 @ 0x06
movw r0,#0 @ 0x0a
bl bar(PLT) @ 0x0e

28
ld/testsuite/ld-arm/cortex-a8-fix-blx-plt.d Normal file
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@ -0,0 +1,28 @@
.*
Disassembly of section \.plt:
00008000 <\.plt>:
8000: e52de004 push {lr} ; \(str lr, \[sp, #-4\]!\)
8004: e59fe004 ldr lr, \[pc, #4\] ; 8010 <foo-0xfe0>
8008: e08fe00e add lr, pc, lr
800c: e5bef008 ldr pc, \[lr, #8\]!
8010: 00000ffc \.word 0x00000ffc
8014: e28fc600 add ip, pc, #0
8018: e28cca00 add ip, ip, #0
801c: e5bcfffc ldr pc, \[ip, #4092\]! ; 0xffc
Disassembly of section \.text:
00008ff0 <foo>:
8ff0: 46c0 nop ; \(mov r8, r8\)
8ff2: f240 0000 movw r0, #0
8ff6: f240 0000 movw r0, #0
8ffa: f240 0000 movw r0, #0
8ffe: f000 e804 blx 9008 <foo\+0x18>
9002: 0000 movs r0, r0
9004: 0000 movs r0, r0
9006: 0000 movs r0, r0
9008: eafffc01 b 8014 <foo-0xfdc>

10
ld/testsuite/ld-arm/cortex-a8-fix-blx-plt.s Normal file
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@ -0,0 +1,10 @@
.syntax unified
.globl foo
.type foo,%function
.thumb_func
foo:
nop @ 0x00
movw r0,#0 @ 0x02
movw r0,#0 @ 0x06
movw r0,#0 @ 0x0a
blx bar @ 0x0e

18
ld/testsuite/ld-arm/cortex-a8-fix-plt.ld Normal file
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@ -0,0 +1,18 @@
OUTPUT_ARCH(arm)
ENTRY(_start)
SECTIONS
{
. = 0x07000;
.hash : { *(.hash) }
.gnu.hash : { *(.gnu.hash) }
.dynsym : { *(.dynsym) }
.dynstr : { *(.dynstr) }
.rel.dyn : { *(.rel.dyn) }
.rel.plt : { *(.rel.plt) }
. = 0x08000;
.plt : { *(.plt) }
. = 0x08ff0;
.text : { *(.text) }
. = 0x10000;
.dynamic : { *(.dynamic) }
}