2,611 questions
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Cpu mode switches fails in Qemu-i686-system
This is the original post. Look it up for more precise details.
BootLoader/Kernel-Qemu: Real Mode section, how to link into my executable. It gets executed as 32 bit
====
I think I found the issue. ...
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15
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What this error is even about? "qemu-system-arm: warning: Blocked re-entrant IO on MemoryRegion: v7m_systick at addr: 0x0"
I am using Qemu with -
qemu-system-arm \
-M mps3-an524 \
-cpu cortex-m33 \
-smp 2 \
-nographic \
-kernel firmware.elf
It is runs perfectly. UART works ...
- 63
0
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0
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19
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Bochs-bin not responding [closed]
I am making an operating system. When i try to run it with bochs bochs-bin doesn't respond and when i try to press wait it shows the error again.
Operating system: Zorin Os 18 core
bochsrc.txt file:
...
- 1
4
votes
1
answer
119
views
Qemu Bios; Configuring VGA
I'm trying to write a simple hello world bios for Qemu as an academic exercise, and I've gotten Qemu to believe the display is initialized. I see a black screen upon boot, but writing to character ...
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0
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113
views
How to run Android 13+ (aosp-arm64) on QEMU without Cuttlefish?
I have been trying to run a self-compiled AOSP build in QEMU. I have successfully compiled the AOSP source code for android-13.0.0_r84 (target aosp_arm64-eng) and obtained the following image files:
...
- 1
15
votes
1
answer
386
views
Using OUTB to set cursor position in my minimal OS kernel causes QEMU screen to flicker
I am getting started with a minimal OS kernel (just gdt and place holder idt). Using i386 assembly and freestanding C. I wanted to change the position of the cursor for which i found several sites ...
- 177
0
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40
views
DISAS_NORETURNs causing errors while attempting to intercept QEMU syscalls by tweaking the ecall() function
I am trying to modify the ecall behavior in QEMU usermode simulation, so that i can intercept system calls.
The way i intend to do it is by reading states from the CPURISCVState with tcg_gen_ld_tl -- ...
0
votes
0
answers
44
views
Fatal "unsupported VMA range" when running aarch64 TSAN binaries via qemu
Summary
I'm trying to execute binaries compiled with TSAN for aarch64 on an x86_64 host via qemu-aarch64 and encounter
FATAL: ThreadSanitizer: unsupported VMA range
FATAL: Found 47 - Supported 39, 42 ...
- 33
1
vote
0
answers
104
views
Android Studio AVD crashes with “qemu-system-x86_64.exe – APPCRASH – 0xc0000005”
I’m running automated tests using Appium, ADB, and Python, with multiple Android Studio AVDs.
When I run four AVDs simultaneously, one of them occasionally crashes with this error in Windows Event ...
- 11
3
votes
1
answer
147
views
INT 13, AH=42h fails with AH=1, CF=1
I am trying to write a simple bootloader which loads my program from LBA=1 into memory and jumps to its start. I emulate my bootloader in qemu with -drive flag passed. When I try to read blocks from ...
1
vote
1
answer
57
views
How to simulate a weakly order memory environment on a host with strong memory order?
I want to test if there are any bugs in my program where the memory sequence has not been properly used, but I do not have a weakly order memory environment for testing.
For example, on x86, all loads ...
- 563
0
votes
0
answers
138
views
Error "ioctl SNDRV_PCM_IOCTL_WRITEI_FRAMES: Input/output error", when writing frames to `/dev/snd/pcmC0D0p`
I am trying to write a c program (on linux), that plays a sine wave from the speakers, using the alsa kernel interface:
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <sound/asound.h>
#...
- 827
1
vote
1
answer
90
views
Why doesn't qemu manage to use my customized DRAM?
I need to implement a custom QEMU DRAM Device to simulate row activations and precharge cycles and enable high-frequency row access to induce emulated bit flips.
But when I run qemu on buildroot this ...
- 19
0
votes
0
answers
86
views
AArch64 RPi4b bare-metal OS hangs after MMU enable
I am currently writing a small bare-metal OS for Raspberry Pi 4b for the AArch64/Arm64 architecture.
Unfortunately the OS hangs after enabling the MMU on real hardware. When testing the OS in QEMU ...
0
votes
1
answer
50
views
HPUX 10.20 math under qemu-system-hppa virtualization
Using qemu built from the last sources in a debian 12 machine :
./configure --target-list=hppa-softmmu --enable-numa --enable-slirp
as stated in documentation [1]
I installed a fresh HPUX 10.20 from ...
- 104