mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-15 04:31:49 +08:00
8cb6e17571
Looking at the ARM disassembler output, every comment seems to start
with a ';' character, so I assumed this was the correct character to
start an assembler comment.
I then spotted a couple of places where there was no ';', but instead,
just a '@' character. I thought that this was a case of a missing
';', and proposed a patch to add the missing ';' characters.
Turns out I was wrong, '@' is actually the ARM assembler comment
character, while ';' is the statement separator. Thus this:
nop ;@ comment
is two statements, the first is the 'nop' instruction, while the
second contains no instructions, just the '@ comment' comment text.
This:
nop @ comment
is a single 'nop' instruction followed by a comment. And finally,
this:
nop ; comment
is two statements, the first contains the 'nop' instruction, while the
second contains the instruction 'comment', which obviously isn't
actually an instruction at all.
Why this matters is that, in the next commit, I would like to add
libopcodes syntax styling support for ARM.
The question then is how should the disassembler style the three cases
above?
As '@' is the actual comment start character then clearly the '@' and
anything after it can be styled as a comment. But what about ';' in
the second example? Style as text? Style as a comment?
And the third example is even harder, what about the 'comment' text?
Style as an instruction mnemonic? Style as text? Style as a comment?
I think the only sensible answer is to move the disassembler to use
'@' consistently as its comment character, and remove all the uses of
';'.
Then, in the next commit, it's obvious what to do.
There's obviously a *lot* of tests that get updated by this commit,
the only actual code changes are in opcodes/arm-dis.c.
60 lines
1.5 KiB
Makefile
60 lines
1.5 KiB
Makefile
.*: file format elf32-.*arm
|
|
architecture: armv6t2, flags 0x00000150:
|
|
HAS_SYMS, DYNAMIC, D_PAGED
|
|
start address 0x.*
|
|
|
|
Disassembly of section .plt:
|
|
|
|
00008170 <.plt>:
|
|
.*: e52de004 push {lr} @ .*
|
|
.*: e59fe004 ldr lr, \[pc, #4\] @ .*
|
|
.*: e08fe00e add lr, pc, lr
|
|
.*: e5bef008 ldr pc, \[lr, #8\]!
|
|
.*: 000080e0 .word 0x000080e0
|
|
.*: e08e0000 add r0, lr, r0
|
|
.*: e5901004 ldr r1, \[r0, #4\]
|
|
.*: e12fff11 bx r1
|
|
.*: e52d2004 push {r2} @ .*
|
|
.*: e59f200c ldr r2, \[pc, #12\] @ .*
|
|
.*: e59f100c ldr r1, \[pc, #12\] @ .*
|
|
.*: e79f2002 ldr r2, \[pc, r2\]
|
|
.*: e081100f add r1, r1, pc
|
|
.*: e12fff12 bx r2
|
|
.*: 000080d8 .word 0x000080d8
|
|
.*: 000080b8 .word 0x000080b8
|
|
|
|
Disassembly of section .text:
|
|
|
|
000081b0 <text>:
|
|
.*: e59f0004 ldr r0, \[pc, #4\] @ .*
|
|
.*: fafffff2 blx .* <\.plt\+0x14>
|
|
.*: e1a00000 nop @ .*
|
|
.*: 000080b4 .word 0x000080b4
|
|
.*: 4801 ldr r0, \[pc, #4\] @ .*
|
|
.*: f7ff efe0 blx .* <\.plt\+0x14>
|
|
.*: bf00 nop
|
|
.*: 000080a5 .word 0x000080a5
|
|
|
|
Disassembly of section .foo:
|
|
|
|
04001000 <foo>:
|
|
.*: e59f0004 ldr r0, \[pc, #4\] @ .*
|
|
.*: fa000009 blx 4001030 .*
|
|
.*: e1a00000 nop @ .*
|
|
.*: fc00f264 .word 0xfc00f264
|
|
.*: e59f0004 ldr r0, \[pc, #4\] @ .*
|
|
.*: fa000005 blx 4001030 .*
|
|
.*: e1a00000 nop @ .*
|
|
.*: fc00f25c .word 0xfc00f25c
|
|
.*: 4801 ldr r0, \[pc, #4\] @ .*
|
|
.*: f000 e806 blx 4001030 .*
|
|
.*: bf00 nop
|
|
.*: fc00f245 .word 0xfc00f245
|
|
.*: 00000000 .word 0x00000000
|
|
|
|
04001030 <__unnamed_veneer>:
|
|
.*: e59f1000 ldr r1, \[pc\] @ .*
|
|
.*: e08ff001 add pc, pc, r1
|
|
.*: fc007148 .word 0xfc007148
|
|
.*: 00000000 .word 0x00000000
|