Our internal program is written in C and makes extensive use of snprintf() for many pieces, and I noticed that during debugging with perf record/report, it's sp
I'm taking a course on computer structure and I'm lost. I was given the following file: Hello.s: #This is a simple "Hello World!" program .section .rodat
I'm developing a microkernel for my personal research. I have chosen to run my kernel at 0xf0000000, leaving 3.75 GiB for user space programs. When my kernel st
I couldn't find much information or specification that suits me, so I have no choice but to ask here. When we call some function with the call instruction and t
Once I initialize and load my GDT into the GDTR using lgdt, how can I update the GDT later? Am I correct if I use the sgdt command to get the base address and t
So I've been practicing to write simple subroutines in FASMW using the CDECL and STDCALL calling conventions and it got me wondering about what the printf funct
I try to put on stack the values contained by array_output but every time I print the values from the stack it prints just 0s. If I try to print the array simpl
I am fairly new to assembly, but I'm trying to dive into the world of low level computing. I'm trying to learn how to write assembly code that would run as boot
I'm testing the memory bandwidth on a desktop and a server. Sklyake desktop 4 cores/8 hardware threads Skylake server Xeon 8168 dual socket 48 cores (24 per so
/* jump to reset vector. esp := 0 */ int main(int argc, char **argv) { PRINT("reset\n"); _eflags = 0; // interrupt disabled __asm__ __volatile__ ("\
(This question refers specifically to x86/x86_64) I'm working on an application that needs to insert a small block of instructions at specific points within ano
Specifically is: mov %eax, %ds Slower than mov %eax, %ebx Or are they the same speed. I've researched online, but have been unable to find a definitive an
I have an old pc powered by an Intel Core2 Quad [email protected] (both Bios and linux dmidecode don't tell more than that), I can add that the CPU belongs to: Family
I'm trying to find the minimum value of a list using assembly language. I'm trying to use -1 to compare all the other values to. my current code is data_items:
I'm trying to find the minimum value of a list using assembly language. I'm trying to use -1 to compare all the other values to. my current code is data_items:
I am new to assembly language. Please help me how to find the higher bits after these instruction MOV AX,08H MOV BX, 07H ADD AX,BX I know a little bit shiftin
I recently made a program with C++ and ASM. Can anyone help me make this code a more efficient one , in the ASM part or both. I would really a
Speaking of the memory model of C++ for concurrency, Stroustrup's C++ Programming Language, 4th ed., sect. 41.2.1, says: ... (like most modern hardware) the
This question is about terminology for 32-bit vs. 64-bit x86. If I have 2 directories with source code of the same program - one for 32-bit Windows and another
I am trying to load only the first byte in a register after data is passed into it for example if I have the following ASM code global _start section .data stri