How to execute function

Hi, this question is suitable to micro controller programming. I have a function and fix its location at some particular address in linker file. Now i want to execute this function on particular condition. How to do it? I am thinking of using function pointers like

Code:

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Void (*fctptr) (void).

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Can i assign an address to this fctptr same as the address of the function in linker file like fctptr = (void *)8000.
Any help? This is the typical application of bootloader.

Given this
void (*fctptr) (void);
You call it with
fctptr();

> Can i assign an address to this fctptr same as the address of the function in linker file like fctptr = (void *)8000.
Yeah, you should be able to.

my confusion is if i a pointer is pointing to unsigned char like

Code:

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unsigned char *p;

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then we type cast it to unsigned char and assign to p like for example

Code:

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p = (unsigned char *)0x100;

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but in the case of function pointers how should i type cast like for exampe

Code:

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int (*fptr)(int);

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and if i am trying to assign any address how should i typecast? can i do simply as below?

Code:

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fptr = (void *)1000;

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For everything can i simply use (void *)?

A function pointer cast looks like this.

Code:

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#include <stdio.h>
 
int main ( ) {
  int (*fp)(void);
  fp = (int(*)(void))100;
  if ( fp() ) {
  }
  return 0;
}

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Now i Understand, Thanks.