[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Bug 1914021] Re: qemu: uncaught target signal 4 (Illegal instruction) b
From: |
Peter Maydell |
Subject: |
[Bug 1914021] Re: qemu: uncaught target signal 4 (Illegal instruction) but gdb remote-debug exited normally |
Date: |
Mon, 01 Feb 2021 11:05:49 -0000 |
For me, with current head-of-git QEMU, the program crashes with a
SIGSEGV very early in execution, because:
0x00008260: e59f30f0 ldr r3, [pc, #0xf0]
loads 0 into r3, and then
0x00008270: e1a0d003 mov sp, r3
sets sp to 0, and then
0x000087b0: e92d4030 push {r4, r5, lr}
tries to write to addres 0, which causes a SEGV.
This happens whether using the gdbstub or not.
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1914021
Title:
qemu: uncaught target signal 4 (Illegal instruction) but gdb remote-
debug exited normally
Status in QEMU:
New
Bug description:
I'm getting Illegal instruction (core dumped) when running the
attached a.out_err binary in qemu, but when using Gdb to remote-debug
the program, it exited normally. will appreciate if you can help look
into this qemu issue.
readelf -h a.out_err
ELF Header:
Magic: 7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00
Class: ELF32
Data: 2's complement, little endian
Version: 1 (current)
OS/ABI: UNIX - System V
ABI Version: 0
Type: EXEC (Executable file)
Machine: ARM
Version: 0x1
Entry point address: 0x8220
Start of program headers: 52 (bytes into file)
Start of section headers: 54228 (bytes into file)
Flags: 0x5000200, Version5 EABI, soft-float ABI
Size of this header: 52 (bytes)
Size of program headers: 32 (bytes)
Number of program headers: 3
Size of section headers: 40 (bytes)
Number of section headers: 16
Section header string table index: 15
qemu-arm version 4.0.0
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1914021/+subscriptions