Questions tagged [stack-pointer]
The register that points to the current location in the call-stack. Details vary by CPU architecture, but implicit use by push/pop instructions is common. (Please also include an architecture tag!)
stack-pointer
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How to prepare stack pointer for bare metal Rust?
I'm trying to write an x86 bootloader and operating system completely in Rust (no separate assembly files, only inline assembly within Rust).
My bootloader works completely as intended within the QEMU ...
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How to get the stack pointer and return address and restore them to a previous state
I'm trying to implement a poor man's call with current continuation for a program written in C. I can "easily" access and memcpy the relevant part of the C stack (obviously, that's not ...
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If the stack grows downwards, how does it not overlap with other stuff in the address space?
I realized I never really thought of this.
If I made a large enough recursive call chain, wouldn't the stack eventually grow down enough that it will overlap with other things, like shared libraries (...
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ARM Cortex-M PC and SP values - reset behavior
I am trying to understand the ARM cortex-M hardware behavior on reset; particularly how the SP and PC values are written upon a cold start or hard reset.
Basically, it would seem the hardware (aka PE ...
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Why does the Stack Pointer in MIPS Typically Start at 0x7FFFFFFC but not 0x80000000?
According to Patterson & Hennessy's Computer Organization and Design (MIPS Edition),
the stack pointer $sp is typically initialized to 0x7FFFFFFC.
the stack pointer $sp is always pointing at the ...
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Using end of memory address as process stack pointer value causing INVPC hard fault
In STM32L432KC(arm cortex-m4+FPU) there are two ram memory blocks. Following is a snippet from the linker script I use.
_e_ram2_stack = ORIGIN(RAM2) + LENGTH(RAM2);
_e_ram_stack = ORIGIN(RAM ) + ...
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How Stack is filled and how ESP behaves during stack overflow exploitation
I sent the following string using python to the vulnerable application
buffer = prefix + overflow + return_addr (of JMP ESP) + NOPs + shellcode
The above buffer string successfully gave me the reverse ...
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Clang ignores -mstack-alignment=XX flag
This is related to an issue described in this question -- a reproducible example can be found there, as well as a description of the environment (briefly: Apple Silicon with macOS Sonoma and clang 15)....
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Cortex M4 stacking and unstacking with a diferent stack pointer
It is possible to achieve this in a cortex-m4? What i mean is having PSP only on that intervals, and all the rest MSP when there is an interrupt?
The objective is just to do the stacking and ...
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I can't use RSP to reference the end of the stack
in my system (x86_64), when I'm using GDB, both RBP and RSP point to the same memory address after pushing a new stack frame, therefore I can't reference the end of the stack with the register RSP ...
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STM8 Assembly startup code: Access Core registers to initialize stack pointer
I am currently trying to write startup code in assembly for an STM8 without any vendor libraries. More specifically, I am using an STM8S103f3p6. I am still inexperienced in assembly and with startup ...
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Frame, Stack Frame in process Stacking Unstacking
Stacking process
When I talked about the stacking process I was talking about the frame that it would store the data of CPU registers like PC(Program counter) or LR but the advisor said it wasn't and ...
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Stack pointer add on loop
Learning some reverse engineering and I came across some examples of loops in x86 assembly
00401036 mov [ebp+var_4], 0
0040103D mov [ebp+var_8], 0
00401044 loc_401044:
00401044 ...
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STM32 and SP value at startup: should the reset handler set SP manually?
I am experiencing a sporadic bug on some STM32F7s. While usually SP register takes its initial value from reset vector (stored in persistent read-only memory), sometimes it is initially set to an ...
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What happens in the CPU if I pop / push all the stack?
I am doing an energy profile of an ARM processor for an academic project. I managed to measure the power consumption of several assembly instructions by running them in a ~200 insts loop, e.g.:
.rept ...
