[Bug tdep/34519] RISC-V: GDB crashes when disassembling elf32-bigriscv produced by -mbig-endian, and remote PC is byte-swapped

tromey at sourceware dot org via Gdb-prs <[email protected]> Mon, 17 Aug 2026 14:12:03 +0000

Newsgroups	gmane.comp.gdb.bugs.discuss
Message-ID	<[email protected]/bugzilla/>

https://sourceware.org/bugzilla/show_bug.cgi?id=34519

--- Comment #4 from Tom Tromey <tromey at sourceware dot org> ---
(In reply to liu xu from comment #3)

> > Could you try the gdb 18 pre-release or git master?

> I have reproduced a RISC-V big-endian remote debugging register endian issue
> with GDB 18.0.90.

> Offline GDB disassembly works correctly and GDB recognizes the file as
> elf32-bigriscv.

Ok, it sounds like upgrading gdb fixed the originally-reported bug.

> This suggests the RISC-V big-endian remote register path is applying the
> wrong byte order for register packets. 

Can you "set debug remote 1" before the "target remote"?
This will show a log of the remote protocol traffic.
Maybe from this we can see if the bug is in gdb or the remote.

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