Collectives™ on Stack Overflow
Find centralized, trusted content and collaborate around the technologies you use most.
Learn more about Collectives1vote
1answer
87views
Why am I getting `-bash: ./animalprogram.bin: No such file or directory` on a fully built and linked program?
OK so I'm trying to create some educational content, and I seem to have come to an impasse myself. I'm building a very simple C / ASM project just to demonstrate linkage. All appears fine and well ...
4votes
0answers
83views
WRITE Access violation on `RET` instruction
I got a report from my application saying:Access violation at address 00000000004FE77A in module 'Sample.exe' (offset FE77A). Write of address 0000000048000300The RIP is the same 00000000004FE77A ...
- 5,698
0votes
0answers
38views
Meaning of Q in SSE instruction mnemonics
I'm learning SSE programming and I come across this instruction:(V)CVTDQ2PS—Convert Packed Doubleword Integers to Packed Single-Precision FloatingPointI thought CVT means convert, D means Dword, ...
- 347
2votes
1answer
56views
u-boot fails to boot for qemu on x86_64 platform
I have compiled u-boot from source for x86_64 platform.git clone https://source.denx.de/u-boot/u-boot.gitcd u-bootmake qemu-x86_64_defconfig The u-boot.bin binary is generated successfully....
- 459
-1votes
1answer
74views
Incorrect result in custom assembly function (converting str to long) [duplicate]
I wanted to rewrite some functions from C to assembly in my project, one of them is converting a string to long long integer.It looks like this: if, for example, the rdi register points to the ...
2votes
1answer
51views
jmp 0x1234 does not compile in clang with .intel_syntax?
Using clang on macOS with Xcode, the following x86_64 assembly code compiles successfully, which does NOT use Intel Syntax. The jmp instruction jumps to a displacement of 0x1234 bytes from the current ...
0votes
1answer
56views
Can't extract a path from HTTP request in assembly [duplicate]
I am trying to extract a file path from an HTTP request in x86-64 assembly. However, the extracted path appears to be an empty string when I try to use it with the open syscall. The HTTP request is ...
- 1
-1votes
1answer
91views
Why these ascii characters in this string in asm code will automatically subtract 1?
org 0x7c00BOOTDRIVE equ 0x9000flatcode equ 0x0008 flatdata equ 0x0010 ...
- 115
0votes
0answers
26views
macOS Assembly: Preventing Segmentation Fault When Calling ___error() in System Call Error Handling [duplicate]
I'm working on implementing a custom read function in x86_64 assembly for macOS and encountering an intriguing issue with error handling.When implementing system call error management, I need to set ...
1vote
0answers
75views
Calling dlopen by setting the registers using ptrace throws SIGSEGV - Intel 64
I'm trying to load a shared library (controller process) into another process (target) using ptrace.NOTE: Both the controller and target are using the same version of libc. /usr/lib/libc.so.6I'm ...
- 1,323
3votes
1answer
113views
Why does MSVC x64 C use 8-byte int32 parameter alignment instead of 4-byte?
I'm writing a C compiler as a hobby and would like it to be able to link against C static libraries produced by MSVC.I read the Microsoft x64 ABI, and it doesn't seem to have a strongly mandated ...
- 93
0votes
1answer
74views
Using Win32 API in assembly crashes with exit code -1073741819 (0xC0000005) - access violation
I'm trying to rewrite the following C code in x86_64 assembly as a learning exercise. It calls the Win32 API functions.#include <windows.h>__attribute__((section(".rdata"))) ...
- 27
2votes
1answer
107views
Intel ICX C++ compiler often generates slower code
We are trying to switch from the old Intel icc/icl compiler to the new icx compiler. After seeing a substantial performance degradation (in the order of 30%), and trying all the optimization options ...
- 41
0votes
0answers
25views
Weird Behavior in Assembly, printing doesn't work when I loop it [duplicate]
I am learning assembly 64 bit in windows and I made a bubble sort algorithm but it doesn't work when I put the print in a loop instead of copying and pasting the same line with increasing amounts of ...
1vote
0answers
98views
Setting up paging and managing memory in low-level C (kernel) without OS
I have an issue where I think I just misunderstands how this works.In low-level C code (aka running C code without an OS) I have to create a way for memory to be managed, providing my own malloc ...
- 11
- The Overflow Blog
- Featured on Meta
Related Tags
assembly × 4774
c × 1229
x86 × 1178
linux × 1053
nasm × 941
gcc × 726
c++ × 661
att × 310
calling-convention × 298
windows × 257
cpu-architecture × 251
macos × 246
64-bit × 229
intel × 223
inline-assembly × 202
gdb × 197
gnu-assembler × 196
system-calls × 192
performance × 191
cpu-registers × 186
linux-kernel × 165
sse × 156
masm × 153
disassembly × 144
reverse-engineering × 140
more related tagsHot Network Questions
- NPN Transistor Saturation: "Ib must be at least 10% of Ic", how strict is that rule?
- In the second and third books of "Remembrance of Earth's Past," why is the game still being mentioned when no one needs recruiting anymore?
- Is a person who testifies to Congress immune from civil action for their testimony?
- How to stop a genetically enhanced army from becoming a state within a state?
- Why is sacrificing my bishop to capture a pawn considered the best move?
- Why did the DOGE saving estimates go from 1 or 2 trillion USD down to 150 billion USD for FY26?
- How can I professionally address repeated lack of detail in user stories without causing tension in the team?
- Can you construct a 3x3x3 cube using 9 red, 9 green and 9 blue unit cubes such that there is no “line” of 3 unit cubes that are all the same color?
- nive tecti sunt : past participle + esse or perfect passive?
- What gives the executive branch the power to freeze a college’s funding?
- Labeling displaced points QGIS does not honor displaced position
- Can constructor's member initializer include initialization of another member?
- Why was Aristotle respected a lot during the Medieval era?
- Why is git commit signing not using ssh-agent?
- Frame dependence of De Broglie wavelenth
- Understanding the type of regression to use when data is an average of 3 Likert items and residuals are not random?
- Removing elements based on nested dictionary values
- Why doesn’t `sudo -E` preserve `PERL5LIB`?
- LEDs with current limiting resisters on a stripboard
- What prevents solar sails from being used?
- How true is it that there is such a thing as an optimal tariff rate?
- Why is the law of definite proportions necessary?
- Polarisability of the hydrogen atom from second-order Rayleigh-Schrodinger perturbation theory
- How to describe a killing blow, finishing move, or a last hit as a fighter?