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Re: ARM long branch stub: thumb
Here is an updated patch, using the veneer code provided by Paul.
I have also modified the Thumb -> Arm stub which also used to push
registers on the stack.
Christophe.
2009-02-19 Christophe Lyon <christophe.lyon@st.com>
bfd/
* elf32-arm.c (elf32_arm_stub_long_branch_thumb_only): Fix stub
code.
(elf32_arm_stub_long_branch_v4t_thumb_arm): Likewise.
(arm_type_of_stub): Use Thumb-only long branch stub (non-PIC) when
BLX is not available. Fix typo in warning message. Add comments
and improve formatting.
(arm_build_one_stub): Adjust to new
elf32_arm_stub_long_branch_v4t_thumb_arm stub.
(arm_map_one_stub): Likewise.
testsuite/
* ld-arm/arm-elf.exp: Rewrite non-EABI variants of
thumb2-bl-as-thumb1-bad and thumb2-bl-bad tests, which now
pass. farcall-thumb-thumb now passes in EABI mode.
* ld-arm/farcall-thumb-arm-pic-veneer.d: Fixed name, source, as
and ld flags to match intended test.
* ld-arm/farcall-thumb-arm.d: New expected result.
* ld-arm/farcall-thumb-thumb-m.d: Likewise.
* ld-arm/farcall-thumb-thumb-m-pic-veneer.d: Fixed name and ld
flags.
* ld-arm/farcall-thumb-thumb-pic-veneer.d: Likewise.
* ld-arm/farcall-thumb-thumb.d: New expected result, this test is
now expected to pass.
* ld-arm/thumb2-bl-as-thumb1-bad-noeabi.d: Likewise.
* ld-arm/thumb2-bl-bad-noeabi.d: Likewise.
* ld-arm/thumb2-bl-as-thumb1-bad.d: Update addresses according to
new use.
* ld-arm/thumb2-bl-as-thumb1-bad.s: Update comment.
Index: bfd/elf32-arm.c
===================================================================
RCS file: /cvs/src/src/bfd/elf32-arm.c,v
retrieving revision 1.172
diff -u -p -r1.172 elf32-arm.c
--- bfd/elf32-arm.c 18 Feb 2009 16:56:37 -0000 1.172
+++ bfd/elf32-arm.c 20 Feb 2009 14:12:23 -0000
@@ -2032,11 +2032,11 @@ static const bfd_vma elf32_arm_stub_long
to ARM. */
static const bfd_vma elf32_arm_stub_long_branch_thumb_only[] =
{
- 0x4e02b540, /* push {r6, lr} */
- /* ldr r6, [pc, #8] */
- 0x473046fe, /* mov lr, pc */
- /* bx r6 */
- 0xbf00bd40, /* pop {r6, pc} */
+ 0x4802b401, /* push {r0} */
+ /* ldr r0, [pc, #8] */
+ 0xbc014684, /* mov ip, r0 */
+ /* pop {r0} */
+ 0xbf004760, /* bx ip */
/* nop */
0x00000000, /* dcd R_ARM_ABS32(X) */
};
@@ -2045,13 +2045,10 @@ static const bfd_vma elf32_arm_stub_long
available. */
static const bfd_vma elf32_arm_stub_long_branch_v4t_thumb_arm[] =
{
- 0x4e03b540, /* push {r6, lr} */
- /* ldr r6, [pc, #12] */
- 0x473046fe, /* mov lr, pc */
- /* bx r6 */
- 0xe8bd4040, /* pop {r6, pc} */
- 0xe12fff1e, /* bx lr */
- 0x00000000, /* dcd R_ARM_ABS32(X) */
+ 0x46c04778, /* bx pc */
+ /* nop */
+ 0xe51ff004, /* ldr pc, [pc, #-4] */
+ 0x00000000, /* dcd R_ARM_ABS32(X) */
};
/* V4T Thumb -> ARM short branch stub. Shorter variant of the above
@@ -2819,20 +2816,27 @@ arm_type_of_stub (struct bfd_link_info *
if (!thumb_only)
{
stub_type = (info->shared | globals->pic_veneer)
+ /* PIC stubs. */
? ((globals->use_blx)
+ /* V5T and above. */
? arm_stub_long_branch_any_any_pic
+ /* not yet supported on V4T. */
: arm_stub_none)
- : (globals->use_blx)
- ? arm_stub_long_branch_any_any
- : arm_stub_none;
+
+ /* non-PIC stubs. */
+ : ((globals->use_blx)
+ /* V5T and above. */
+ ? arm_stub_long_branch_any_any
+ /* V4T. */
+ : arm_stub_long_branch_thumb_only);
}
else
{
stub_type = (info->shared | globals->pic_veneer)
+ /* PIC stub not yet supported on V4T. */
? arm_stub_none
- : (globals->use_blx)
- ? arm_stub_long_branch_thumb_only
- : arm_stub_none;
+ /* non-PIC stub. */
+ : arm_stub_long_branch_thumb_only;
}
}
else
@@ -2849,12 +2853,19 @@ arm_type_of_stub (struct bfd_link_info *
}
stub_type = (info->shared | globals->pic_veneer)
+ /* PIC stubs. */
? ((globals->use_blx)
+ /* V5T and above. */
? arm_stub_long_branch_any_any_pic
+ /* not yet supported on V4T. */
: arm_stub_none)
- : (globals->use_blx)
- ? arm_stub_long_branch_any_any
- : arm_stub_long_branch_v4t_thumb_arm;
+
+ /* non-PIC stubs. */
+ : ((globals->use_blx)
+ /* V5T and above. */
+ ? arm_stub_long_branch_any_any
+ /* V4T. */
+ : arm_stub_long_branch_v4t_thumb_arm);
/* Handle v4t short branches. */
if ((stub_type == arm_stub_long_branch_v4t_thumb_arm)
@@ -2876,7 +2887,7 @@ arm_type_of_stub (struct bfd_link_info *
{
(*_bfd_error_handler)
(_("%B(%s): warning: interworking not enabled.\n"
- " first occurrence: %B: Thumb call to ARM"),
+ " first occurrence: %B: ARM call to Thumb"),
sym_sec->owner, input_bfd, name);
}
@@ -2887,10 +2898,14 @@ arm_type_of_stub (struct bfd_link_info *
|| !globals->use_blx)
{
stub_type = (info->shared | globals->pic_veneer)
+ /* PIC stubs. */
? arm_stub_long_branch_any_any_pic
- : (globals->use_blx)
- ? arm_stub_long_branch_any_any
- : arm_stub_long_branch_v4t_arm_thumb;
+ /* non-PIC stubs. */
+ : ((globals->use_blx)
+ /* V5T and above. */
+ ? arm_stub_long_branch_any_any
+ /* V4T. */
+ : arm_stub_long_branch_v4t_arm_thumb);
}
}
else
@@ -2900,7 +2915,9 @@ arm_type_of_stub (struct bfd_link_info *
|| (branch_offset < ARM_MAX_BWD_BRANCH_OFFSET))
{
stub_type = (info->shared | globals->pic_veneer)
+ /* PIC stubs. */
? arm_stub_long_branch_any_any_pic
+ /* non-PIC stubs. */
: arm_stub_long_branch_any_any;
}
}
@@ -3188,7 +3205,7 @@ arm_build_one_stub (struct bfd_hash_entr
case arm_stub_long_branch_v4t_thumb_arm:
_bfd_final_link_relocate (elf32_arm_howto_from_type (R_ARM_ABS32),
stub_bfd, stub_sec, stub_sec->contents,
- stub_entry->stub_offset + 16, sym_value, 0);
+ stub_entry->stub_offset + 8, sym_value, 0);
break;
case arm_stub_short_branch_v4t_thumb_arm:
{
@@ -11697,9 +11714,9 @@ arm_map_one_stub (struct bfd_hash_entry
return FALSE;
if (!elf32_arm_output_map_sym (osi, ARM_MAP_THUMB, addr))
return FALSE;
- if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr + 8))
+ if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr + 4))
return FALSE;
- if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 16))
+ if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 8))
return FALSE;
break;
case arm_stub_short_branch_v4t_thumb_arm:
Index: ld/testsuite/ld-arm/arm-elf.exp
===================================================================
RCS file: /cvs/src/src/ld/testsuite/ld-arm/arm-elf.exp,v
retrieving revision 1.44
diff -u -p -r1.44 arm-elf.exp
--- ld/testsuite/ld-arm/arm-elf.exp 5 Feb 2009 21:54:43 -0000 1.44
+++ ld/testsuite/ld-arm/arm-elf.exp 20 Feb 2009 14:12:33 -0000
@@ -190,10 +190,20 @@ run_dump_test "emit-relocs1"
# Exclude non-ARM-EABI targets.
if { ![istarget "arm*-*-*eabi"] } {
- # Special variants of these tests, as no farcall stub is generated
- # for a non-ARM-EABI target
- run_dump_test "thumb2-bl-as-thumb1-bad-noeabi"
- run_dump_test "thumb2-bl-bad-noeabi"
+ # Special variants of these tests, as a different farcall stub is
+ # generated for a non-ARM-EABI target: indeed in such a case,
+ # there are no attributes to indicate that blx can be used.
+
+ set arm_noeabi_tests {
+ {"Thumb-2-as-Thumb-1 BL" "-Ttext 0x1000 --section-start .foo=0x100100c" "" {thumb2-bl-as-thumb1-bad.s}
+ {{objdump -d thumb2-bl-as-thumb1-bad-noeabi.d}}
+ "thumb2-bl-as-thumb1-bad"}
+ {"Thumb-2 BL" "-Ttext 0x1000 --section-start .foo=0x100100c" "" {thumb2-bl-bad.s}
+ {{objdump -d thumb2-bl-bad-noeabi.d}}
+ "thumb2-bl-bad"}
+ }
+ run_ld_link_tests $arm_noeabi_tests
+
return
}
@@ -241,7 +251,7 @@ set armeabitests {
{"MOVW/MOVT against shared libraries" "tmpdir/arm-lib.so" "" {arm-app-movw.s}
{{objdump -Rw arm-app.r}}
"arm-app-movw"}
- {"Thumb-2-as-Thumb-1 BL" "-Ttext 0x1000 --section-start .foo=0x40100c" "" {thumb2-bl-as-thumb1-bad.s}
+ {"Thumb-2-as-Thumb-1 BL" "-Ttext 0x1000 --section-start .foo=0x100100c" "" {thumb2-bl-as-thumb1-bad.s}
{{objdump -d thumb2-bl-as-thumb1-bad.d}}
"thumb2-bl-as-thumb1-bad"}
{"Thumb-2 BL" "-Ttext 0x1000 --section-start .foo=0x100100c" "" {thumb2-bl-bad.s}
@@ -277,6 +287,9 @@ set armeabitests {
{"Thumb-Thumb farcall M profile" "-Ttext 0x1000 --section-start .foo=0x2001014" "-march=armv7m" {farcall-thumb-thumb.s}
{{objdump -d farcall-thumb-thumb-m.d}}
"farcall-thumb-thumb-m"}
+ {"Thumb-Thumb farcall" "-Ttext 0x1000 --section-start .foo=0x2001014" "-march=armv4t" {farcall-thumb-thumb.s}
+ {{objdump -d farcall-thumb-thumb.d}}
+ "farcall-thumb-thumb"}
{"Thumb-Thumb farcall with BLX (PIC veneer)" "-Ttext 0x1000 --section-start .foo=0x2001014 --pic-veneer" "-march=armv5t" {farcall-thumb-thumb.s}
{{objdump -d farcall-thumb-thumb-blx-pic-veneer.d}}
"farcall-thumb-thumb-blx-pic-veneer"}
@@ -328,7 +341,6 @@ run_dump_test "attr-merge-wchar-24-nowar
run_dump_test "attr-merge-wchar-40-nowarn"
run_dump_test "attr-merge-wchar-42-nowarn"
run_dump_test "attr-merge-wchar-44-nowarn"
-run_dump_test "farcall-thumb-thumb"
run_dump_test "farcall-thumb-thumb-pic-veneer"
run_dump_test "farcall-thumb-thumb-m-pic-veneer"
run_dump_test "farcall-thumb-arm-pic-veneer"
Index: ld/testsuite/ld-arm/farcall-thumb-arm-pic-veneer.d
===================================================================
RCS file: /cvs/src/src/ld/testsuite/ld-arm/farcall-thumb-arm-pic-veneer.d,v
retrieving revision 1.1
diff -u -p -r1.1 farcall-thumb-arm-pic-veneer.d
--- ld/testsuite/ld-arm/farcall-thumb-arm-pic-veneer.d 15 May 2008 17:00:15 -0000 1.1
+++ ld/testsuite/ld-arm/farcall-thumb-arm-pic-veneer.d 20 Feb 2009 14:12:33 -0000
@@ -1,5 +1,5 @@
-#name: Thumb-Thumb farcall without BLX
-#source: farcall-thumb-thumb.s
-#as: -march=armv4t
-#ld: -Ttext 0x1000 --section-start .foo=0x2001014
+#name: Thumb-ARM farcall without BLX (PIC veneer)
+#source: farcall-thumb-arm.s
+#as: -march=armv4t -W
+#ld: -Ttext 0x1000 --section-start .foo=0x2001014 --pic-veneer
#error: .*\(.text\+0x0\): relocation truncated to fit: R_ARM_THM_CALL against `bar'
Index: ld/testsuite/ld-arm/farcall-thumb-arm.d
===================================================================
RCS file: /cvs/src/src/ld/testsuite/ld-arm/farcall-thumb-arm.d,v
retrieving revision 1.4
diff -u -p -r1.4 farcall-thumb-arm.d
--- ld/testsuite/ld-arm/farcall-thumb-arm.d 25 Jun 2008 14:28:48 -0000 1.4
+++ ld/testsuite/ld-arm/farcall-thumb-arm.d 20 Feb 2009 14:12:33 -0000
@@ -3,17 +3,14 @@
Disassembly of section .text:
00001000 <__bar_from_thumb>:
- 1000: b540 push {r6, lr}
- 1002: 4e03 ldr r6, \[pc, #12\] \(1010 <__bar_from_thumb\+0x10>\)
- 1004: 46fe mov lr, pc
- 1006: 4730 bx r6
- 1008: e8bd4040 pop {r6, lr}
- 100c: e12fff1e bx lr
- 1010: 02001014 .word 0x02001014
- 1014: 00000000 .word 0x00000000
+ 1000: 4778 bx pc
+ 1002: 46c0 nop \(mov r8, r8\)
+ 1004: e51ff004 ldr pc, \[pc, #-4\] ; 1008 <__bar_from_thumb\+0x8>
+ 1008: 02001014 .word 0x02001014
+ 100c: 00000000 .word 0x00000000
-00001018 <_start>:
- 1018: f7ff fff2 bl 1000 <__bar_from_thumb>
+00001010 <_start>:
+ 1010: f7ff fff6 bl 1000 <__bar_from_thumb>
Disassembly of section .foo:
02001014 <bar>:
Index: ld/testsuite/ld-arm/farcall-thumb-thumb-m-pic-veneer.d
===================================================================
RCS file: /cvs/src/src/ld/testsuite/ld-arm/farcall-thumb-thumb-m-pic-veneer.d,v
retrieving revision 1.1
diff -u -p -r1.1 farcall-thumb-thumb-m-pic-veneer.d
--- ld/testsuite/ld-arm/farcall-thumb-thumb-m-pic-veneer.d 15 May 2008 17:00:15 -0000 1.1
+++ ld/testsuite/ld-arm/farcall-thumb-thumb-m-pic-veneer.d 20 Feb 2009 14:12:33 -0000
@@ -1,5 +1,5 @@
-#name: Thumb-Thumb farcall without BLX
+#name: Thumb-Thumb farcall M profile (PIC veneer)
#source: farcall-thumb-thumb.s
#as: -march=armv4t
-#ld: -Ttext 0x1000 --section-start .foo=0x2001014
+#ld: -Ttext 0x1000 --section-start .foo=0x2001014 --pic-veneer
#error: .*\(.text\+0x0\): relocation truncated to fit: R_ARM_THM_CALL against `bar'
Index: ld/testsuite/ld-arm/farcall-thumb-thumb-m.d
===================================================================
RCS file: /cvs/src/src/ld/testsuite/ld-arm/farcall-thumb-thumb-m.d,v
retrieving revision 1.3
diff -u -p -r1.3 farcall-thumb-thumb-m.d
--- ld/testsuite/ld-arm/farcall-thumb-thumb-m.d 25 Jun 2008 14:28:48 -0000 1.3
+++ ld/testsuite/ld-arm/farcall-thumb-thumb-m.d 20 Feb 2009 14:12:33 -0000
@@ -3,11 +3,11 @@
Disassembly of section .text:
00001000 <__bar_veneer>:
- 1000: b540 push {r6, lr}
- 1002: 4e02 ldr r6, \[pc, #8\] \(100c <__bar_veneer\+0xc>\)
- 1004: 46fe mov lr, pc
- 1006: 4730 bx r6
- 1008: bd40 pop {r6, pc}
+ 1000: b401 push {r0}
+ 1002: 4802 ldr r0, \[pc, #8\] \(100c <__bar_veneer\+0xc>\)
+ 1004: 4684 mov ip, r0
+ 1006: bc01 pop {r0}
+ 1008: 4760 bx ip
100a: bf00 nop
100c: 02001015 .word 0x02001015
Index: ld/testsuite/ld-arm/farcall-thumb-thumb-pic-veneer.d
===================================================================
RCS file: /cvs/src/src/ld/testsuite/ld-arm/farcall-thumb-thumb-pic-veneer.d,v
retrieving revision 1.1
diff -u -p -r1.1 farcall-thumb-thumb-pic-veneer.d
--- ld/testsuite/ld-arm/farcall-thumb-thumb-pic-veneer.d 15 May 2008 17:00:15 -0000 1.1
+++ ld/testsuite/ld-arm/farcall-thumb-thumb-pic-veneer.d 20 Feb 2009 14:12:33 -0000
@@ -1,5 +1,5 @@
-#name: Thumb-Thumb farcall without BLX
+#name: Thumb-Thumb farcall without BLX (PIC veneer)
#source: farcall-thumb-thumb.s
#as: -march=armv4t
-#ld: -Ttext 0x1000 --section-start .foo=0x2001014
+#ld: -Ttext 0x1000 --section-start .foo=0x2001014 --pic-veneer
#error: .*\(.text\+0x0\): relocation truncated to fit: R_ARM_THM_CALL against `bar'
Index: ld/testsuite/ld-arm/farcall-thumb-thumb.d
===================================================================
RCS file: /cvs/src/src/ld/testsuite/ld-arm/farcall-thumb-thumb.d,v
retrieving revision 1.1
diff -u -p -r1.1 farcall-thumb-thumb.d
--- ld/testsuite/ld-arm/farcall-thumb-thumb.d 15 May 2008 17:00:15 -0000 1.1
+++ ld/testsuite/ld-arm/farcall-thumb-thumb.d 20 Feb 2009 14:12:33 -0000
@@ -1,5 +1,19 @@
-#name: Thumb-Thumb farcall without BLX
-#source: farcall-thumb-thumb.s
-#as: -march=armv4t
-#ld: -Ttext 0x1000 --section-start .foo=0x2001014
-#error: .*\(.text\+0x0\): relocation truncated to fit: R_ARM_THM_CALL against `bar'
+.*: file format .*
+
+Disassembly of section .text:
+
+00001000 <__bar_veneer>:
+ 1000: b401 push {r0}
+ 1002: 4802 ldr r0, \[pc, #8\] \(100c <__bar_veneer\+0xc>\)
+ 1004: 4684 mov ip, r0
+ 1006: bc01 pop {r0}
+ 1008: 4760 bx ip
+ 100a: bf00 nop
+ 100c: 02001015 .word 0x02001015
+
+00001010 <_start>:
+ 1010: f7ff fff6 bl 1000 <__bar_veneer>
+Disassembly of section .foo:
+
+02001014 <bar>:
+ 2001014: 4770 bx lr
Index: ld/testsuite/ld-arm/thumb2-bl-as-thumb1-bad-noeabi.d
===================================================================
RCS file: /cvs/src/src/ld/testsuite/ld-arm/thumb2-bl-as-thumb1-bad-noeabi.d,v
retrieving revision 1.1
diff -u -p -r1.1 thumb2-bl-as-thumb1-bad-noeabi.d
--- ld/testsuite/ld-arm/thumb2-bl-as-thumb1-bad-noeabi.d 31 May 2008 16:04:57 -0000 1.1
+++ ld/testsuite/ld-arm/thumb2-bl-as-thumb1-bad-noeabi.d 20 Feb 2009 14:12:33 -0000
@@ -1,4 +1,19 @@
-#name: Thumb-2-as-Thumb-1 BL failure test
-#source: thumb2-bl-as-thumb1-bad.s
-#ld: -Ttext 0x1000 --section-start .foo=0x401004
-#error: .*\(.text\+0x0\): relocation truncated to fit: R_ARM_THM_CALL against `bar'
+.*: file format .*
+
+Disassembly of section .text:
+
+00001000 <__bar_veneer>:
+ 1000: b401 push {r0}
+ 1002: 4802 ldr r0, \[pc, #8\] \(100c <__bar_veneer\+0xc>\)
+ 1004: 4684 mov ip, r0
+ 1006: bc01 pop {r0}
+ 1008: 4760 bx ip
+ 100a: bf00 nop
+ 100c: 0100100d .word 0x0100100d
+
+00001010 <_start>:
+ 1010: f7ff fff6 bl 1000 <__bar_veneer>
+Disassembly of section .foo:
+
+0100100c <bar>:
+ 100100c: 4770 bx lr
Index: ld/testsuite/ld-arm/thumb2-bl-as-thumb1-bad.d
===================================================================
RCS file: /cvs/src/src/ld/testsuite/ld-arm/thumb2-bl-as-thumb1-bad.d,v
retrieving revision 1.4
diff -u -p -r1.4 thumb2-bl-as-thumb1-bad.d
--- ld/testsuite/ld-arm/thumb2-bl-as-thumb1-bad.d 25 Jun 2008 14:28:48 -0000 1.4
+++ ld/testsuite/ld-arm/thumb2-bl-as-thumb1-bad.d 20 Feb 2009 14:12:33 -0000
@@ -4,11 +4,11 @@ Disassembly of section .text:
00001000 <__bar_veneer>:
1000: e51ff004 ldr pc, \[pc, #-4\] ; 1004 <__bar_veneer\+0x4>
- 1004: 0040100d .word 0x0040100d
+ 1004: 0100100d .word 0x0100100d
00001008 <_start>:
1008: f7ff effa blx 1000 <__bar_veneer>
Disassembly of section .foo:
-0040100c <bar>:
- 40100c: 4770 bx lr
+0100100c <bar>:
+ 100100c: 4770 bx lr
Index: ld/testsuite/ld-arm/thumb2-bl-as-thumb1-bad.s
===================================================================
RCS file: /cvs/src/src/ld/testsuite/ld-arm/thumb2-bl-as-thumb1-bad.s,v
retrieving revision 1.3
diff -u -p -r1.3 thumb2-bl-as-thumb1-bad.s
--- ld/testsuite/ld-arm/thumb2-bl-as-thumb1-bad.s 15 May 2008 17:00:15 -0000 1.3
+++ ld/testsuite/ld-arm/thumb2-bl-as-thumb1-bad.s 20 Feb 2009 14:12:33 -0000
@@ -12,7 +12,7 @@
_start:
bl bar
-@ We will place the section .foo at 0x40100c.
+@ We will place the section .foo at 0x100100c.
.section .foo, "xa"
.thumb_func
Index: ld/testsuite/ld-arm/thumb2-bl-bad-noeabi.d
===================================================================
RCS file: /cvs/src/src/ld/testsuite/ld-arm/thumb2-bl-bad-noeabi.d,v
retrieving revision 1.1
diff -u -p -r1.1 thumb2-bl-bad-noeabi.d
--- ld/testsuite/ld-arm/thumb2-bl-bad-noeabi.d 31 May 2008 16:04:57 -0000 1.1
+++ ld/testsuite/ld-arm/thumb2-bl-bad-noeabi.d 20 Feb 2009 14:12:33 -0000
@@ -1,4 +1,19 @@
-#name: Thumb-2 BL failure test
-#source: thumb2-bl-bad.s
-#ld: -Ttext 0x1000 --section-start .foo=0x1001004
-#error: .*\(.text\+0x0\): relocation truncated to fit: R_ARM_THM_CALL against `bar'
+.*: file format .*
+
+Disassembly of section .text:
+
+00001000 <__bar_veneer>:
+ 1000: b401 push {r0}
+ 1002: 4802 ldr r0, \[pc, #8\] \(100c <__bar_veneer\+0xc>\)
+ 1004: 4684 mov ip, r0
+ 1006: bc01 pop {r0}
+ 1008: 4760 bx ip
+ 100a: bf00 nop
+ 100c: 0100100d .word 0x0100100d
+
+00001010 <_start>:
+ 1010: f7ff fff6 bl 1000 <__bar_veneer>
+Disassembly of section .foo:
+
+0100100c <bar>:
+ 100100c: 4770 bx lr