musl - [RFC PATCH 0/1] Stack unwinding issues with GDB on ARM.

Follow @Openwall on Twitter for new release announcements and other news

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <je45wizow3p7zkjcevk3izutnotxd4nchhi2zycchejbqv65e2@5tdvycnbtnio>
Date: Wed, 12 Mar 2025 16:40:59 +0100
From: Ignacy Gawędzki <ignacy.gawedzki@...en-communications.fr>
To: musl@...ts.openwall.com
Subject: [RFC PATCH 0/1] Stack unwinding issues with GDB on ARM.

Hi,

While inspecting a coredump from an ARM executable linked with musl, I
strumbled upon an issue with stack unwinding by GDB when $pc was in
__syscall_cp_asm.

The following patch is a proposal to help in this situation by telling
how to find the current frame start using CFI annotations.

I wonder if this is something that would be acceptable in this
situation and whether such thing should be added to other archs as
well.

Looking forward to reading your comments.

Cheers,

Ignacy

Ignacy Gawędzki (1):
  arm: Add CFA annotations to __syscall_cp_asm.

 src/thread/arm/syscall_cp.s | 3 +++
 1 file changed, 3 insertions(+)

-- 
2.45.2

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.