From: "linux-os \(Dick Johnson\)" <[email protected]>
Subject: Re: [HELP] How to get address of module
Date: Mon, 8 Aug 2005 09:51:25 -0400
> What do you want the address of in your driver? Do you want the
> address of its various entry points (hint, the stuff you put
> into the "struct file_operations"), or its startup code, module_init(),
> exit code, module_exit(), etc.
>
> These are can all be obtained using conventional 'C' syntax. You
> don't need to search some list somehere. You driver isn't just
> put somewhere en-masse. The code is in the .text segment, relocated
> to exist in allocated memory. The data sections are also relocated
> to different sections of allocated memory.
>
> You get the address of a function by referencing its name:
>
> static int ioctl(struct inode *inp, struct file *fp, size_t cmd, unsigned long
> arg)
> {
> unsigned long val;
> switch(cmd)
> {
> case GET_ADDRESS_OF_IOCTL:
> val = (unsigned long) ioctl;
> if(put_user(val, (unsigned long *)arg))
> return -EFAULT
> break;
> case ETC:
> }
>
> Your driver probably has many functions, therefore it has many
> addresses. It's not just a single "module" somewhere.
Thank you.
What I wanted is: given the segfault address, I would like to
1) get which module it is in
2) in that module, within which function it segfaulted
module_address_lookup() would do!
HK.
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