what is stack winding and stack unwinding


 
Thread Tools Search this Thread
Top Forums Programming what is stack winding and stack unwinding
# 1  
Old 08-07-2007
what is stack winding and stack unwinding

helo can u tell me what do you mean by stack winding and stack unwinding
Regards,
Amit
# 2  
Old 08-07-2007
Sounds a little like homework. However:
When program run, each function(data, registers, program counter, etc) is mapped onto the stack as it is called. Because the function calls other functions, they too are mapped onto the stack. This is stack winding.

Unwinding is the removal of the functions from the stack in the reverse order.
# 3  
Old 08-07-2007
Where this starts getting fun is when you have exceptions or setjmp/longjmp which let you unwind the stack without returning.

Some platforms also have "structured exception handling" (OS/2,Win32) which are basically a standardised way of stack unwinding in exceptional conditions.

Some platforms (eg 32bit PA-RISC) have a bottom-up stack rather than a top-down.
Login or Register to Ask a Question

Previous Thread | Next Thread

7 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

What happens to the stack?

Consider this bad code, edited in Windows and run via CygWin after dos2unix so be aware of any hidden "\r" charatcers... #!/bin/bash n=0 stackit() { eval $1 if then exit 0 fi n=$ echo "$n" stackit stackit } stackit stackit Run under CygWin:- AMIGA:~> cd /tmp AMIGA:/tmp>... (2 Replies)
Discussion started by: wisecracker
2 Replies

2. Shell Programming and Scripting

Stack Trace

Hi All Thought it would be kind of fun to implement a stack trace for a shell script that calls functions within a sub shell. This is for bash under Linux and probably not portable - #! /bin/bash error_exit() { echo "=======================" echo $1 echo... (4 Replies)
Discussion started by: steadyonabix
4 Replies

3. UNIX for Dummies Questions & Answers

Kernel Stack vs User Mode Stack

Hi, I am new to the linux kernel development area. I want to know what is the difference between kernel mode stack and user mode stack? Does each process has a user mode stack and a kernel mode stack?? Or Each process has a user mode stack and there is only one kernel mode stack that is shared by... (4 Replies)
Discussion started by: saurabhkoar
4 Replies

4. Programming

Regarding stack analysis

I would like to know how I could do the following : void func(){ int a = 100; b=0; int c = a/b; } void sig_handler (int sig,siginfo_t *info,void *context){ //signal handling function //here I want to access the variables of func() } int main(){ struct sigaction *act =... (7 Replies)
Discussion started by: vpraveen84
7 Replies

5. UNIX for Dummies Questions & Answers

memory stack

Hello everbody: when issuing the ulimit -a, on my tru64 machone, I get the following: root@billing4# ulimit -a time(seconds) unlimited file(blocks) unlimited data(kbytes) 10485760 stack(kbytes) 32768 memory(kbytes) 10190528 coredump(blocks) 0... (1 Reply)
Discussion started by: aladdin
1 Replies

6. UNIX for Advanced & Expert Users

stack region

how can i determine that what percentage of stack region is currently is used? (i am using tru64 unix) (2 Replies)
Discussion started by: yakari
2 Replies

7. Programming

The stack layout

I try to solve the problem https://www.unix.com/showthread.php?p=86595 use stack hack method, I am puzzled the stack layout. under vc6.0, the following code work(in release mode). #include <stdio.h> void change() { int x; int j; (&x) = 5; // if in debug mode, change to (&x) = 5;... (1 Reply)
Discussion started by: ChenMing
1 Replies
Login or Register to Ask a Question