CVS commit: src/sys/arch/i386/i386

[David Laight <dsl%netbsd.org@localhost>]

Module Name:    src
Committed By:   dsl
Date:           Sun Jan 17 22:21:18 UTC 2010

Modified Files:
        src/sys/arch/i386/i386: trap.c vector.S

Log Message:
Fix 'fault on load of %gs during retirn to userspace' to look for the
  correct instruction bytes.
Take the 'fault on load segment register' through the same path as 'fault
  on iret' so we don't have to fixup the broken stackframe that contains a
  mix of user and kernel registers,
Update comments about how the faults during return to userspace are processed.
Setting an invalid %gs in the saved context of a signal handler causes
  a SIGSEGV handler to be entered with what look like valid registers.


To generate a diff of this commit:
cvs rdiff -u -r1.252 -r1.253 src/sys/arch/i386/i386/trap.c
cvs rdiff -u -r1.50 -r1.51 src/sys/arch/i386/i386/vector.S

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.