Re: gdbserver: Target description specified unknown architecture “aarch64”

[Peter Balazovic <balazovic dot peter at gmail dot com>]

under ubuntu I installed

sudo apt-get update
sudo apt-get install gdb-multiarch

at terminal:
~/work/test1$ gdb-multiarch -q "my_hello_application"

(gdb) set architecture
Display all 184 possibilities? (y or n)
aarch64                        mips:4400
aarch64:ilp32                  mips:4600
alpha                          mips:4650
alpha:ev4                      mips:5000
alpha:ev5                      mips:5400
alpha:ev6                      mips:5500
arm                            mips:5900
armv2                          mips:6000
armv2a                         mips:7000
armv3                          mips:8000
armv3m                         mips:9000
armv4                          mips:isa32
armv4t                         mips:isa32r2
armv5                          mips:isa32r3
armv5t                         mips:isa32r5
armv5te                        mips:isa32r6
auto                           mips:isa64
ep9312                         mips:isa64r2
hppa1.0                        mips:isa64r3
i386                           mips:isa64r5
i386:intel                     mips:isa64r6
i386:nacl                      mips:loongson_2e
i386:x64-32                    mips:loongson_2f

it seems it communicates ... I use
https://www.tutorialspoint.com/unix_commands/gdbserver.htm

if you find other way around just post it :)


On Thu, Nov 29, 2018 at 7:05 AM Peter Balazovic <balazovic.peter@gmail.com>
wrote:

> understand, question is how to add more supported machines on gdb ...
>
> On Thu, Nov 29, 2018 at 1:22 AM Pedro Alves <palves@redhat.com> wrote:
>
>> On 11/28/2018 10:42 PM, Peter Balazovic wrote:
>> > this is mine config available on gdb
>> >
>> > (gdb) show configuration
>> > This GDB was configured as follows:
>> >    configure --host=x86_64-w64-mingw32 --target=x86_64-w64-mingw32
>>                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^
>>
>> As suspected, here's the problem ^^
>>
>> > ("Relocatable" means the directory can be moved with the GDB
>> installation
>> > tree, and GDB will still find it.)
>> > (gdb) set architecture
>> > auto               i386:intel         i386:x64-32
>> i386:x64-32:nacl
>> >  i386:x86-64:intel  i8086
>> > i386               i386:nacl          i386:x64-32:intel  i386:x86-64
>> > i386:x86-64:nacl
>>
>> As you can see, your build of gdb only supports x86 machines.
>>
>> With an --enable-targets=all build, I see many, many more entries:
>>
>> (gdb) set architecture
>> Requires an argument. Valid arguments are ARC600, A6, ARC601, ARC700, A7,
>> ARCv2, EM, HS, arm, armv2, armv2a, armv3, armv3m, armv4, armv4t, armv5,
>> armv5t, armv5te, xscale, ep9312, iwmmxt, iwmmxt2, armv5tej, armv6, armv6kz,
>> armv6t2, armv6k, armv7, armv6-m, armv6s-m, armv7e-m, armv8-a, armv8-r,
>> armv8-m.base, armv8-m.main, arm_any, avr, avr:1, avr:2, avr:25, avr:3,
>> avr:31, avr:35, avr:4, avr:5, avr:51, avr:6, avr:100, avr:101, avr:102,
>> avr:103, avr:104, avr:105, avr:106, avr:107, bfin, cris, crisv32,
>> cris:common_v10_v32, csky, [...]
>> ia64-elf64, ia64-elf32, auto.
>> (gdb)
>>
>> ... including the aarch64 you need:
>>
>> (gdb) set architecture aarch64<TAB>
>> aarch64        aarch64:ilp32
>>
>> >
>> >
>> > On Wed, Nov 28, 2018 at 11:28 PM Pedro Alves <palves@redhat.com> wrote:
>> >
>> >> On 11/28/2018 06:31 PM, Peter Balazovic wrote:
>> >>
>> >>> I am looking for an advice to correctly debug with ARM remote target.
>> >>
>> >> Does "set architecture <TAB><TAB>" give you the option to select
>> aarch64?
>> >>
>> >> It sounds like your gdb is not configured to support Aarch64.
>> >>
>> >> You'll need a gdb configured with
>> >>   --target=aarch64-linux-gnu
>> >> or
>> >>   --enable-targets=aarch64-linux-gnu
>> >>   --enable-targets=all
>> >>
>> >> Try "show configuration" in gdb.
>>
>> Thanks,
>> Pedro Alves
>>
>