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Re: [PATCH v1 9/9] target/m68k: fix gdb for m68xxx
From: |
Richard Henderson |
Subject: |
Re: [PATCH v1 9/9] target/m68k: fix gdb for m68xxx |
Date: |
Fri, 1 May 2020 07:45:40 -0700 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 |
On 4/30/20 12:01 PM, Alex Bennée wrote:
> From: KONRAD Frederic <address@hidden>
>
> Currently "cf-core.xml" is sent to GDB when using any m68k flavor. Thing is
> it uses the "org.gnu.gdb.coldfire.core" feature name and gdb 8.3 then expects
> a coldfire FPU instead of the default m68881 FPU.
>
> This is not OK because the m68881 floats registers are 96 bits wide so it
> crashes GDB with the following error message:
>
> (gdb) target remote localhost:7960
> Remote debugging using localhost:7960
> warning: Register "fp0" has an unsupported size (96 bits)
> warning: Register "fp1" has an unsupported size (96 bits)
> ...
> Remote 'g' packet reply is too long (expected 148 bytes, got 180 bytes): \
> 00000000000[...]0000
>
> With this patch: qemu-system-m68k -M none -cpu m68020 -s -S
>
> (gdb) tar rem :1234
> Remote debugging using :1234
> warning: No executable has been specified and target does not support
> determining executable automatically. Try using the "file" command.
> 0x00000000 in ?? ()
> (gdb) p $fp0
> $1 = nan(0xffffffffffffffff)
>
> Signed-off-by: KONRAD Frederic <address@hidden>
> Signed-off-by: Alex Bennée <address@hidden>
> Message-Id: <address@hidden>
> ---
Reviewed-by: Richard Henderson <address@hidden>
r~
- Re: [PATCH v1 9/9] target/m68k: fix gdb for m68xxx,
Richard Henderson <=