Questions tagged [x86]
The processor architecture of most PCs and servers, including the 386/486/Pentium/… (IA-32) 32-bit family and the amd64 64-bit family. Most x86 processors are made by Intel or AMD.
231 questions
1 vote
0 answers
25 views
How to step over an "int 3" on x86_64 with KVM?
On the x86 platform, the int 3 instruction causes a breakpoint trap. For KVM, the Virtual CPUs can be configured to exit to the hypervisor on this trap, by enabling the flags KVM_GUESTDBG_ENABLE and ...
- 11
1 vote
1 answer
66 views
Qemu: EFI stub: ERROR: Failed to decompress kernel
I created a raw disk image with qemu-img and created an EFI and an EXT4 filesystem on it with losetup, fdisk, mkfs.vfat and mkfs.ext4. As a quick hack, because I couldn't find efi shell on the laptop ...
- 131
2 votes
0 answers
61 views
Using Das U-Boot to boot Linux on x86_64 UEFI platform
I have some troubles booting Linux Kernel from Das U-Boot on x86_64 UEFI Platform. I tried to use default efi application defconfig target (x86-app), with addition scsi, sata and some other config ...
- 21
0 votes
0 answers
30 views
Signal handling in debugger in linux
I am working on a debugger and found an issue. I start at the beginning of the dynamic linker (this is a low-level debugger). At this address, I set it so that for a particular signal, the process ...
-1 votes
1 answer
68 views
Linux not reading /boot directory off of USB
I'm attempting to run 32 bit linux off of a usb for an old XP machine. There are important files on the computer's base drive, so formatting or partitioning isn't on the cards. So far I've tried AntiX ...
0 votes
1 answer
618 views
Why am I unable to start/run Lutris after installing it?
Recently, I tried installing Lutris and Wine on my machine (which uses Debian 12 as its operating system with a 64-bit architecture and Plasma for my desktop). First, I installed Wine via this guide ...
- 1
5 votes
2 answers
1k views
Why does exception in interrupt always lead to Kernel Panic?
If a CPU exception in kernel, such as bad memory access or invalid opcode, happens in the context of servicing a user process (like syscall or page-in), or in a kthread process, then, until ...
- 149
1 vote
1 answer
292 views
Changing the GNUPG home directory on NixOS
I'm setting up NixOS 24.05 and I'm using the equivalent version of Home Manager. I'm trying to move the directory for GNUPG to $HOME/.local/share/gnupg also known as $XDG_DATA_HOME/gnupg. I know that ...
- 11
0 votes
1 answer
334 views
How is my x86_64 machine is running an arm64 binary? [duplicate]
My machine's architecture is x86_64 and I've cross-compiled arm64 assembly (from here) into an executable. However the binary is still runnable on my machine... how? Here are the outputs to the ...
- 3
1 vote
1 answer
705 views
Unmet dependencies and broken packages after installing libstdc++6
When trying to use screenshare with audio on vesktop, I got an error from the app that read "your c++ library is too old to run venmic", which prompted me to try and update it. I followed ...
- 63
0 votes
1 answer
64 views
How can you tell internal USB controllers (South Bridge) apart from external (Motherboard) controllers?
I recently built a workstation and am running into issues getting Linux to boot. After a lot of trial and error (because mostly the behavior I see is indefinite hangs) I think I've narrowed the issue ...
- 2,601
0 votes
1 answer
408 views
running X86 Virtualbox VM on an Apple silicon Mac, UTM not working
My college provides a virtual machine (SliTaz VM, possibly an old Linux distro) to run veriluoc which is a software to design and simulate logic gates. The problem is that VM was designed to run on ...
3 votes
1 answer
526 views
Differences between qemu-i386 and Linux IA32 emulation
On x86-64 Linux, there are two options for running 32-bit applications: one can be built into the kernel itself via the option CONFIG_IA32_EMULATION (normally on for most kernels), and the other is ...
- 133
0 votes
0 answers
311 views
How to read watchdog registers on x86 Linux?
I want to read the Intel iTCO watchdog registers on my Intel Lynx Point system. I found the watchdog here: [ 5598.341020] iTCO_wdt iTCO_wdt.1.auto: Found a Lynx Point TCO device (Version=2, TCOBASE=...
- 153
75 votes
1 answer
10k views
Why is 'H' / 72 / 0x48 the second most common byte in executables?
(If the score of this question is 72, please don't upvote!) I ran this: cat /usr/bin/* | perl -ne 'map {$a{$_}++} split//; END{print map { "$a{$_}\t$_\n" } keys %a}' | grep --text . | ...
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