[llvm-dev] How to get absolute address of llvm-objdump

[James Henderson via llvm-dev]

Hi,

I thought this was something that somebody had looked at a while back, but
I can't immediately find it. I've explicitly CC'ed Fangrui Song, who has
made a number of disassembly improvements in the past year. He may be able
to help.

James

On Sat, 12 Dec 2020 at 08:57, Haishan via llvm-dev <llvm-dev at lists.llvm.org>
wrote:

>
> I used llvm-objdump to dump aarch64 binary, but it prints relative address
> of .rodata section in adrp instruction.
>
> Like:
>
>   llvm-objdump
>
>   400848: 02 00 00 90   adrp    x2, #0x0
>
>   40084c: 42 60 29 91   add x2, x2, #0xa58
>
>   400850: 44 48 63 38   ldrb    w4, [x2, w3, uxtw]
>
>   400854: 65 00 00 10   adr x5, #0xc
>
>   400858: a4 88 24 8b   add x4, x5, w4, sxtb #2
>
>   40085c: 80 00 1f d6   br  x4
>
> Moreover, when debug llvm-objdump binary, this adrp MCInst express by
> MCExpr which Kind is MCExpr::Target, not immediate.
>
>
>
> But I used objdump tools of binutils, it prints absolute address. Such as:
>
>   400848:       90000002        adrp    x2, 400000 <_init-0x518>
>
>   40084c:       91296042        add     x2, x2, #0xa58
>
>   400850:       38634844        ldrb    w4, [x2,w3,uxtw]
>
>   400854:       10000065        adr     x5, 400860 <local+0x48>
>
>   400858:       8b2488a4        add     x4, x5, w4, sxtb #2
>
>   40085c:       d61f0080        br      x4
>
> So How to get absolute address with llvm MCInst?
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