[Bug binutils/12534] arm: disassembly of pc-relative ldrd instructions not fully annotated in Thumb

[dave.martin at linaro dot org]

http://sourceware.org/bugzilla/show_bug.cgi?id=12534

--- Comment #2 from Dave Martin <dave.martin at linaro dot org> 2011-04-12 
10:35:21 UTC ---
(In reply to comment #1)
> Hi Dave,
> 
>   I believe that this problem is fixed now.  Please could you check locally 
> and
> confirm ?
> 
> Cheers
>   Nick

This doesn't seem to work for me.  As before, the disassembly works as expected
in ARM, but not in Thumb:

binutils$ cat CVS/Root 
:pserver:address@hidden/cvs/src

binutils$ TZ= cvs -z6 update -D'2011-04-12 09:30'
[...]

binutils$ ./configure --build=x86_64-pc-linux-gnu --target=x86_64-pc-linux-gnu
--target=arm-elf-eabi && make
[...]

binutils$ cat <<EOF >ldr-tst.s
.syntax unified

.globl d
d:      .quad   0

.type f, %function
f:      ldrd    r0, r1, d
       nop
       ldrd    r0, r1, d
       ldr     r0, d
       nop
       ldr     r0, d
EOF
binutils$ gas/as-new -mthumb -o ldr-tst.o ldr-tst.s
ldr-tst.s: Assembler messages:
ldr-tst.s:7: Error: cannot represent T32_OFFSET_IMM relocation in this object
file format
ldr-tst.s:9: Error: cannot represent T32_OFFSET_IMM relocation in this object
file format
ldr-tst.s:10: Error: cannot represent T32_OFFSET_IMM relocation in this object
file format
ldr-tst.s:12: Error: cannot represent T32_OFFSET_IMM relocation in this object
file format
binutils$ grep -v '\.globl' ldr-tst.s | gas/as-new -mthumb -o ldr-tst.o -
binutils$ binutils/objdump -d ldr-tst.o

ldr-tst.o:     file format elf32-littlearm


Disassembly of section .text:

00000000 <d>:
    ...

00000008 <f>:
   8:    e95f 0103     ldrd    r0, r1, [pc, #-12]
   c:    46c0          nop            ; (mov r8, r8)
   e:    e95f 0104     ldrd    r0, r1, [pc, #-16]
  12:    f85f 0014     ldr.w    r0, [pc, #-20]    ; 0 <d>
  16:    46c0          nop            ; (mov r8, r8)
  18:    f85f 001c     ldr.w    r0, [pc, #-28]    ; 0 <d>
binutils$ gas/as-new -mthumb -o ldr-tst.o ldr-tst.s
ldr-tst.s: Assembler messages:
ldr-tst.s:7: Error: cannot represent OFFSET_IMM8 relocation in this object file
format
ldr-tst.s:9: Error: cannot represent OFFSET_IMM8 relocation in this object file
format
binutils$ grep -v '\.globl' ldr-tst.s | gas/as-new -mthumb -o ldr-tst.o -
binutils$ binutils/objdump -d ldr-tst.o

ldr-tst.o:     file format elf32-littlearm


Disassembly of section .text:

00000000 <d>:
    ...

00000008 <f>:
   8:    e14f01d0     ldrd    r0, [pc, #-16]    ; 0 <d>
   c:    e1a00000     nop            ; (mov r0, r0)
  10:    e14f01d8     ldrd    r0, [pc, #-24]    ; 0 <d>
  14:    e51f001c     ldr    r0, [pc, #-28]    ; 0 <d>
  18:    e1a00000     nop            ; (mov r0, r0)
  1c:    e51f0024     ldr    r0, [pc, #-36]    ; 0 <d>
binutils$ exit

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