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New posts in cpu-registers
Why Assembly x86_64 syscall parameters are not in alphabetical order like i386
Oct 22, 2025
assembly
x86
x86-64
cpu-registers
calling-convention
Performance comparison: 64 bit and 32 bit multiplication [closed]
Oct 23, 2025
c
performance
cpu
cpu-registers
Meaning of XMM register values shown in Visual Studio debugger's register window
Oct 19, 2025
visual-studio
sse
visual-studio-debugging
cpu-registers
Why does Windows use RCX, RDX for pointers in a fresh x64 process, different from EAX, EBX in a newly created 32-bit process?
Oct 18, 2025
windows
assembly
x86-64
32bit-64bit
cpu-registers
Meaning of pc in gdb (alias?)
Oct 14, 2025
assembly
gcc
gdb
cpu-registers
program-counter
Are "Protection rings" and "CPU modes" the same thing?
Oct 17, 2025
operating-system
cpu
cpu-architecture
cpu-registers
What's the advantage of having nonvolatile registers in a calling convention?
Oct 14, 2025
assembly
x86-64
cpu-architecture
cpu-registers
calling-convention
Why do we use sub esp, 4 instead of push a register in assembly?
Sep 18, 2025
assembly
optimization
x86
stack
cpu-registers
Why the %r0 of SPARC or MIPS, is always 0?
Sep 16, 2025
assembly
mips
cpu-architecture
cpu-registers
sparc
What does the gdb 'x' command do?
Sep 10, 2025
memory
assembly
gdb
cpu-registers
How to force an unused memory read in C that won't be optimized away?
Sep 09, 2025
c
embedded
microcontroller
volatile
cpu-registers
What is the difference between "mov (%rax),%eax" and "mov %rax,%eax"?
Mar 12, 2023
assembly
x86
x86-64
cpu-registers
Swap most significant byte and least significant byte in assembler
Mar 11, 2023
assembly
x86
byte
cpu-registers
Do the x86 segment registers have special meaning/usage on modern CPUs and OSes?
Feb 14, 2023
x86
history
cpu-registers
memory-segmentation
What is this pattern where the EBX register is used for memory access?
Feb 09, 2023
x86
reverse-engineering
cpu-registers
push return values in stack frame
Jan 21, 2023
assembly
stack
cpu-registers
machine-code
stack-frame
How do you add CH to EAX in x86 assembly?
Jan 16, 2023
assembly
x86
cpu-registers
Why are the cpu-registers in OllyDbg not sorted alphabetically?
Dec 29, 2022
assembly
cpu-registers
ollydbg
Are RAX, RBX, RCX, RDX, RSI, RDI, RBP, RSP, R8-R15 interchangable?
Dec 28, 2022
assembly
x86-64
cpu-registers
Why are x86 registers named the way they are?
Sep 02, 2025
assembly
x86
naming
history
cpu-registers
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