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[Bug 1909392] Re: qemu-arm crashes (SIGSEGV) when executing push instruc
From: |
Richard Henderson |
Subject: |
[Bug 1909392] Re: qemu-arm crashes (SIGSEGV) when executing push instruction |
Date: |
Tue, 29 Dec 2020 20:08:17 -0000 |
The program is buggy.
The first instruction sets the stack to 0x20020000,
but that address is not mapped.
Program Headers:
Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
LOAD 0x010000 0x08000000 0x08000000 0x0025c 0x0025c R E 0x10000
LOAD 0x020000 0x20000000 0x0800025c 0x00000 0x00600 RW 0x10000
The data segment only goes from 0x20000000 - 0x20000600.
** Changed in: qemu
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1909392
Title:
qemu-arm crashes (SIGSEGV) when executing push instruction
Status in QEMU:
Invalid
Bug description:
Dear all,
I am afraid I found a problem, it seems like qemu-arm crashes when executing
assembly push instruction.
I use qemu version 5.2.0, but it checked an older version (4.2.1) and the
problem was also present. I start qemu using "qemu-arm -cpu cortex-m4
-singlestep -g 1234 <path to elf file>"
Callstack before crash (host)
#0 0x000055555575961f in stl_he_p (ptr=0x2002fffc, v=0) at
/home/faust1002/Programming/qemu/qemu-5.2.0/include/qemu/bswap.h:353
#1 0x0000555555759716 in stl_le_p (ptr=0x2002fffc, v=0) at
/home/faust1002/Programming/qemu/qemu-5.2.0/include/qemu/bswap.h:395
#2 0x000055555575d3c3 in tcg_qemu_tb_exec (env=0x555555d28050,
tb_ptr=0x7fffe800010a "\r\b") at ../tcg/tci.c:1221
#3 0x00005555556bd982 in cpu_tb_exec (cpu=0x555555d1fd70,
itb=0x7fffe8000000) at ../accel/tcg/cpu-exec.c:178
#4 0x00005555556be57e in cpu_loop_exec_tb (cpu=0x555555d1fd70,
tb=0x7fffe8000000, last_tb=0x7fffffffd8a8, tb_exit=0x7fffffffd8a0) at
../accel/tcg/cpu-exec.c:658
#5 0x00005555556be7ea in cpu_exec (cpu=0x555555d1fd70) at
../accel/tcg/cpu-exec.c:771
#6 0x000055555560af1d in cpu_loop (env=0x555555d28050) at
../linux-user/arm/cpu_loop.c:237
#7 0x00005555557415a7 in main (argc=7, argv=0x7fffffffe0f8,
envp=0x7fffffffe138) at ../linux-user/main.c:861
Callstack before crash (target)
Program received signal SIGSEGV, Segmentation fault.
Reset_Handler () at startup.s:48
48 push {r14}
Please find the elf file I use attached.
Kind regards
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