Bug 79091

Summary: [i386] [patch] Small optimization for i386/support.s
Product: Base System Reporter: Andrey Simonenko <simon>
Component: i386Assignee: freebsd-i386 (Nobody) <i386>
Status: Open ---    
Severity: Affects Only Me    
Priority: Normal    
Version: 5.3-RELEASE   
Hardware: Any   
OS: Any   
Description Flags
file.diff none

Description Andrey Simonenko 2005-03-21 15:40:02 UTC
suword(), suword16(), subyte() and copyinstr() from i386/support.s
restore "trashed" register %ecx, but this register is not really
trashed in case of non I386_CPU in su*() functions and in copyinstr().

The same situation with the same functions in amd64/support.S.

And the same situation with 4.x, 5.x and HEAD.
Comment 1 Remko Lodder freebsd_committer 2010-07-14 08:06:16 UTC
State Changed
From-To: open->feedback

Hello, the code in question is using 'rcx' now instead of 'ecx'to restore 
the registers. That might have solved your problem can you please have a look at that please and confirm whether it's still relevant?
Comment 2 b. f. 2011-05-31 19:44:42 UTC
Feedback for this PR was received on the freebsd-i386 mailing list,
but was not recorded here:


Comment 3 Brendan Fabeny freebsd_committer 2011-06-22 14:59:43 UTC
State Changed
From-To: feedback->open

Feedback has been received
Comment 4 Eitan Adler freebsd_committer freebsd_triage 2017-12-31 08:00:54 UTC
For bugs matching the following criteria:

Status: In Progress Changed: (is less than) 2014-06-01

Reset to default assignee and clear in-progress tags.

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