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[Bug gdb/22645] gdb hangs on 32-bit ARM armv7l at SIGTRAP from "bkpt" instruction 0xe1200070
- From: "jreiser at BitWagon dot com" <sourceware-bugzilla at sourceware dot org>
- To: gdb-prs at sourceware dot org
- Date: Tue, 26 Dec 2017 04:15:14 +0000
- Subject: [Bug gdb/22645] gdb hangs on 32-bit ARM armv7l at SIGTRAP from "bkpt" instruction 0xe1200070
- Auto-submitted: auto-generated
- References: <bug-22645-4717@http.sourceware.org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=22645
--- Comment #1 from John Reiser <jreiser at BitWagon dot com> ---
The same bad behavior also occurs when the bkpt is not the first instruction:
=====
.globl _start
_start:
nop
bkpt
nop
=====
In the past gdb has had trouble when the very first instruction after execve
generated a trap:
https://bugzilla.redhat.com/show_bug.cgi?id=162775
"gdb ignores SIGTRAP at entry address"
2008-03-10 [almost ten years ago]
but the revised test case above, where the SIGTRAP is at the second
instruction, still hangs under gdb.
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