From: Changbin Du <changbin.du@gmail.com>
To: Andrew Burgess <andrew.burgess@embecosm.com>
Cc: Changbin Du <changbin.du@gmail.com>, gdb-patches@sourceware.org
Subject: Re: [PATCH] gdb/riscv: fix creating breakpoints at invalid addresses
Date: Thu, 25 Mar 2021 09:39:25 +0000 [thread overview]
Message-ID: <20210325093924.ak2xw6nz7jet7hml@mail.google.com> (raw)
In-Reply-To: <20210325091752.GO5520@embecosm.com>
On Thu, Mar 25, 2021 at 09:17:52AM +0000, Andrew Burgess wrote:
> * Changbin Du via Gdb-patches <gdb-patches@sourceware.org> [2021-03-25 08:47:57 +0000]:
>
> > To allow breakpoints to be created at invalid addresses,
> > target_read_code() is used instead of read_code(). The
> > original read_code() should be removed, otherwise the
> > breakpoint command will fail.
> >
> > (gdb) hbreak setup_arch
> > Cannot access memory at address 0xffffffe000c036ac
> >
> > gdb/ChangeLog:
> > 2021-03-24 Changbin Du <changbin.du@gmail.com>
> >
> > * riscv-tdep.c (riscv_breakpoint_kind_from_pc): Update.
>
> Can you change this to 'Remove call to read_code.' or similar. Just
> saying 'Update.' isn't very helpful.
>
Sure, please checkout in v2. Thanks.
> Approved with that change.
>
> Thanks,
> Andrew
>
>
>
> > ---
> > gdb/ChangeLog | 4 ++++
> > gdb/riscv-tdep.c | 1 -
> > 2 files changed, 4 insertions(+), 1 deletion(-)
> >
> > diff --git a/gdb/ChangeLog b/gdb/ChangeLog
> > index a548c58e8f72..a84299a2cc38 100644
> > --- a/gdb/ChangeLog
> > +++ b/gdb/ChangeLog
> > @@ -1,3 +1,7 @@
> > +2021-03-25 Changbin Du <changbin.du@gmail.com>
> > +
> > + * riscv-tdep.c (riscv_breakpoint_kind_from_pc): Update.
> > +
> > 2021-03-24 Simon Marchi <simon.marchi@polymtl.ca>
> >
> > * target.h (current_top_target): Remove, make callers use the
> > diff --git a/gdb/riscv-tdep.c b/gdb/riscv-tdep.c
> > index ca3efaf71cf8..c17839968465 100644
> > --- a/gdb/riscv-tdep.c
> > +++ b/gdb/riscv-tdep.c
> > @@ -706,7 +706,6 @@ riscv_breakpoint_kind_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr)
> > user. */
> > if (target_read_code (*pcptr, buf, 1) == -1)
> > buf[0] = 0;
> > - read_code (*pcptr, buf, 1);
> > }
> >
> > if (riscv_debug_breakpoints)
> > --
> > 2.27.0
> >
> >
--
Cheers,
Changbin Du
prev parent reply other threads:[~2021-03-25 9:39 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-25 8:47 Changbin Du
2021-03-25 9:17 ` Andrew Burgess
2021-03-25 9:39 ` Changbin Du [this message]
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