* I compile gdbserver for RISCV on gdb10.1 version, and there is a error
@ 2020-11-13 2:43 hilihui
2020-11-13 13:13 ` Simon Marchi
0 siblings, 1 reply; 6+ messages in thread
From: hilihui @ 2020-11-13 2:43 UTC (permalink / raw)
To: gdb
../../gdbserver/linux-riscv-low.cc:170:42: error: invalid application of 'sizeof' to incomplete type '__riscv_mc_q_ext_state' sizeof (struct __riscv_mc_q_ext_state), OPTIONAL_REGS, ^It seems that "__riscv_mc_q_ext_state" is not defined. How to resolve this question? Thanks!
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: I compile gdbserver for RISCV on gdb10.1 version, and there is a error
2020-11-13 2:43 I compile gdbserver for RISCV on gdb10.1 version, and there is a error hilihui
@ 2020-11-13 13:13 ` Simon Marchi
2020-11-14 3:08 ` Jim Wilson
0 siblings, 1 reply; 6+ messages in thread
From: Simon Marchi @ 2020-11-13 13:13 UTC (permalink / raw)
To: hilihui, gdb
On 2020-11-12 9:43 p.m., hilihui@sina.com wrote:
> ../../gdbserver/linux-riscv-low.cc:170:42: error: invalid application of 'sizeof' to incomplete type '__riscv_mc_q_ext_state' sizeof (struct __riscv_mc_q_ext_state), OPTIONAL_REGS, ^It seems that "__riscv_mc_q_ext_state" is not defined. How to resolve this question? Thanks!
>
In glibc, this type is provided here:
https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/riscv/sys/ucontext.h;h=a4e49fe37a1397fa1babeb0dcefb77341f1e7ad1;hb=HEAD#l65
And it appears to have been there since the beginning of the RISC-V support.
What libc is your system using?
Simon
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: I compile gdbserver for RISCV on gdb10.1 version, and there is a error
2020-11-13 13:13 ` Simon Marchi
@ 2020-11-14 3:08 ` Jim Wilson
0 siblings, 0 replies; 6+ messages in thread
From: Jim Wilson @ 2020-11-14 3:08 UTC (permalink / raw)
To: Simon Marchi; +Cc: hilihui, gdb
On Fri, Nov 13, 2020 at 5:13 AM Simon Marchi <simark@simark.ca> wrote:
> On 2020-11-12 9:43 p.m., hilihui@sina.com wrote:
> > ../../gdbserver/linux-riscv-low.cc:170:42: error: invalid application of
> 'sizeof' to incomplete type '__riscv_mc_q_ext_state' sizeof (struct
> __riscv_mc_q_ext_state), OPTIONAL_REGS,
> ^It seems that "__riscv_mc_q_ext_state" is not defined. How to
> resolve this question? Thanks!
> >
>
> In glibc, this type is provided here:
>
>
> https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/riscv/sys/ucontext.h;h=a4e49fe37a1397fa1babeb0dcefb77341f1e7ad1;hb=HEAD#l65
>
> And it appears to have been there since the beginning of the RISC-V
> support.
>
Since the beginning of upstream support, yes. But it was an academic
project for years before it was upstreamed and some people are stuck with
old stuff because they forked a while back and never upgraded. Or maybe
haven't upgraded yet. The ETH Zurich pulp project for instance.
> What libc is your system using?
>
He sent me private mail too. I suspect he is missing the linux kernel
RISC-V specific ptrace support also. That came after the glibc support.
Jim
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: I compile gdbserver for RISCV on gdb10.1 version, and there is a error
2020-11-20 20:37 ` Jim Wilson
@ 2020-11-21 17:03 ` Rodney M. Bates
0 siblings, 0 replies; 6+ messages in thread
From: Rodney M. Bates @ 2020-11-21 17:03 UTC (permalink / raw)
To: gdb
On 11/20/20 2:37 PM, Jim Wilson wrote:
> On Fri, Nov 20, 2020 at 7:48 AM Rodney M. Bates <rodney_bates@lcwb.coop>
> wrote:
>
>> On 11/16/20 3:55 PM, Jim Wilson wrote:
>>> If you have an old linux kernel, gdb will not work due to bugs in the
>> linux
>>> kernel ptrace support. I submitted two patches to fix two problems in
>> Fall
>>> 2018. Then there was a third patch to add support for FP registers but
>> you
>>> only need that one if you want to look at FP registers. You definitely
>>
>> How old a Linux kernel has these bugs?
>>
>
> Fall 2018. I don't know linux kernel version numbers. You can look it
> up. Certainly 4.15 won't work without patches. But another person pointed
> at a patched 4.15 tree that has the two most important patches.
>
OK, thanks.
> Jim
>
--
Rodney Bates
rodney.m.bates@acm.org
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: I compile gdbserver for RISCV on gdb10.1 version, and there is a error
2020-11-20 15:47 ` Rodney M. Bates
@ 2020-11-20 20:37 ` Jim Wilson
2020-11-21 17:03 ` Rodney M. Bates
0 siblings, 1 reply; 6+ messages in thread
From: Jim Wilson @ 2020-11-20 20:37 UTC (permalink / raw)
To: rodney.m.bates; +Cc: gdb
On Fri, Nov 20, 2020 at 7:48 AM Rodney M. Bates <rodney_bates@lcwb.coop>
wrote:
> On 11/16/20 3:55 PM, Jim Wilson wrote:
> > If you have an old linux kernel, gdb will not work due to bugs in the
> linux
> > kernel ptrace support. I submitted two patches to fix two problems in
> Fall
> > 2018. Then there was a third patch to add support for FP registers but
> you
> > only need that one if you want to look at FP registers. You definitely
>
> How old a Linux kernel has these bugs?
>
Fall 2018. I don't know linux kernel version numbers. You can look it
up. Certainly 4.15 won't work without patches. But another person pointed
at a patched 4.15 tree that has the two most important patches.
Jim
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: I compile gdbserver for RISCV on gdb10.1 version, and there is a error
2020-11-16 21:55 ` Jim Wilson
@ 2020-11-20 15:47 ` Rodney M. Bates
2020-11-20 20:37 ` Jim Wilson
0 siblings, 1 reply; 6+ messages in thread
From: Rodney M. Bates @ 2020-11-20 15:47 UTC (permalink / raw)
To: gdb
On 11/16/20 3:55 PM, Jim Wilson wrote:
> On Mon, Nov 16, 2020 at 5:38 AM <hilihui@sina.com> wrote:
>
>> So do you mean that the gdb for RISCV on some project is not supported,
>> because these projects still use the old linux kernel system.
>>
>> Now i am working on "https://github.com/pulp-platform/ariane-sdk"
>> project, and the project still use the old linux kernel system, so the gdb
>> on the platform is not available.
>>
>
> If you have an old linux kernel, gdb will not work due to bugs in the linux
> kernel ptrace support. I submitted two patches to fix two problems in Fall
> 2018. Then there was a third patch to add support for FP registers but you
> only need that one if you want to look at FP registers. You definitely
How old a Linux kernel has these bugs?
> need the first two patches in the kernel.
>
> Jim
>
--
Rodney Bates
rodney.m.bates@acm.org
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2020-11-21 17:04 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2020-11-13 2:43 I compile gdbserver for RISCV on gdb10.1 version, and there is a error hilihui
2020-11-13 13:13 ` Simon Marchi
2020-11-14 3:08 ` Jim Wilson
[not found] <20201116133833.1659C5D000A6@webmail.sinamail.sina.com.cn>
2020-11-16 21:55 ` Jim Wilson
2020-11-20 15:47 ` Rodney M. Bates
2020-11-20 20:37 ` Jim Wilson
2020-11-21 17:03 ` Rodney M. Bates
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