From mboxrd@z Thu Jan 1 00:00:00 1970 From: Raj Patil Date: Fri, 14 Mar 2003 15:08:51 +0000 Subject: [Linux-ia64] How to set/reset gp pointer : info needed MIME-Version: 1 Content-Type: multipart/mixed; boundary="0-328902887-1047654531=:30698" Message-Id: List-Id: To: linux-ia64@vger.kernel.org --0-328902887-1047654531=:30698 Content-Type: text/plain; charset=us-ascii Hello, I am not sure whether this is the right group for me to ask this or get the kind of information I am looking for. I apologize if this is not the right group. I am relatively new to Linux/ia64 and this question is related to ia64. Hence, decided to post it here I am looking for some info on how to set/unset the gp pointer, locations/cases where I need to set and any other issues I need to worry. Any pointers to some documentation or sample code or notes will be really appreciated. Reason: I am just trying to port an utility to ia64 based Linux platform from x86 platform. It adds an entry to syscall table to point to a function in a module. It is like adding a new temp syscall for a small duration. By looking at some documentation, I realized that I need to set the gp pointer correctly before calling the function (not sure exactly wehre and how). So, I am looking for some docs/notes which clarify my doubts like -what in general needs to be done to set/reset gp (where?). -Does this need to be done if one is adding an entry to ia32 syscall table too? -If this new function in the module calls other kernel functions in between, should it worry about gp pointer before calling the kernel functions etc. I have access to RH Advanced Server 2.1 running on an HP Itanium-2 box. Thank you very much for any pointers/info. Regards, Raj --------------------------------- Do you Yahoo!? Yahoo! Web Hosting - establish your business online --0-328902887-1047654531=:30698 Content-Type: text/html; charset=us-ascii

Hello,

I am not sure whether this is the right group for me to ask this or get the

kind of information I am looking for. I apologize if this is not the

right group. I am relatively new to Linux/ia64 and this question is related

to ia64. Hence, decided to post it here

I am looking for some info on how to set/unset the gp pointer, locations/cases

where I need to set and any other issues I need to worry. Any pointers to

some documentation or sample code or notes will be really appreciated.

Reason: I am just trying to port an utility to ia64 based Linux platform from

x86 platform. It adds an entry to syscall table to point to a function in

a module. It is like adding a new temp syscall for a small duration.

By looking at some documentation, I realized that I need to set

the gp pointer correctly before calling the function (not sure exactly wehre

and how). So, I am looking for some docs/notes which clarify my doubts like

-what in general needs to be done to set/reset gp (where?).

-Does this need to be done if one is adding an entry to ia32 syscall

table too?

-If this new function in the module calls other kernel functions in between,

should it worry about gp pointer before calling the kernel functions etc.

I have access to RH Advanced Server 2.1 running on an HP Itanium-2 box.

Thank you very much for any pointers/info.

Regards,

Raj


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