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Why did the value of the rbx register change unexpectedly in GDB?

I am debugging a program on an

x86-64

x86-64

system

Ubuntu 22.04

Ubuntu 22.04

GDB v10.2

GDB v10.2

GCC 11.2.0

GCC 11.2.0

using

GDB

GDB

and encountered an unexpected behavior. I was inspecting the value of the

rbx

rbx

-5604

-5604

without stepping through any new instructions. I am trying to understand what caused this change, as I did not execute any additional steps

stepi

stepi

or similar commands that would modify the register value.

The sequence of GDB commands I used is in my

gdb.txt

gdb.txt

file

The value of

rbx

rbx

initially read as

in decimal format, but after running the

x/1wd $rbx

x/1wd $rbx

command, the value changed to

-5604

-5604

. I haven’t taken any further steps

stepi

stepi

continue

continue

, so I’m unsure what caused the value to change