tree 0bf8046bb1fa6ccb51df76b56819dee6b6d7487b
parent 5d86456d3852cb95a38d2b23fe01cede54984ba5
author Jeff Dike <jdike@addtoit.com> 1178488285 -0700
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1178565182 -0700

uml: kernel segfaults should dump proper registers

If there's a segfault inside the kernel, we want a dump of the registers at
the point of the segfault, not the registers at the point of calling panic or
the last userspace registers.

sig_handler_common_skas now uses a static register set in the case of a
SIGSEGV to avoid messing up the process registers if the segfault turns out to
be non-fatal.

The architecture sigcontext-to-pt_regs copying code was repurposed to copy
data out of the SEGV stack frame.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>