lkml.org 
[lkml]   [2008]   [Aug]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC][PATCH 2/4] checkpoint/restart: x86 support
Dave Hansen wrote:
> On Fri, 2008-08-08 at 19:04 -0400, Oren Laadan wrote:
>
>>> struct pt_regs is part of the kernel ABI, it will not change.
>>>
>> I'm in favor about keeping the format identical between the variations of
>> each architecture. Note, however, that "struct pt_regs" won't do because it
>> may change with these variations.
>>
>
> "Part of the kernel ABI" makes it sound to me like it won't change.
> Who's right here? :)

Struct pt_regs is not ABI, and can (and has) changed on x86. It's not
suitable for a checkpoint structure because it only contains the
registers that the kernel trashes, not all usermode registers (on i386,
it leaves out %gs, for example). asm-x86/ptrace-abi.h does define stuff
that's fixed in stone; it expresses it in terms of a register array,
with constants defining what element is which register.

J


\
 
 \ /
  Last update: 2008-08-10 16:59    [W:0.205 / U:0.100 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site