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develop a 'customized ld'
- From: "sean yang" <seanatpurdue at hotmail dot com>
- To: binutils at sourceware dot org
- Date: Sat, 10 Sep 2005 10:21:22 +0000
- Subject: develop a 'customized ld'
- Bcc:
Hi folks,
I am looking at the source codes in ld directory(source code related to the
linker) as I want to develop a slightly different linker. Basically, what I
want to do is to find the address of some instructions in a program at link
time.
For example, I want to find the program counter(i.e., the address of the
instruction) of "call '@foo'" instruction at link time.
#demo.c
extern int foo(int);
int main(){
int i, j;
i=foo(1); //which will be compiled to something like "push 1; call
@foo;..."
j=foo(i);
}//the assebly code is not syntatically correct--only try to show my goal.
Conceptually, this doesn't seem to need much code modification---keep most
pass intact and add a customized pass to achieve what i want. ld is a quite
big project to me, honestly. And this is my first time to touch it. Could
someone give me some hint where should I start? Can any expert assess the
difficulty of achieving such functionality?
Thanks,
Sean
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