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authorRichard Weinberger <richard@nod.at>2013-09-23 17:38:02 +0200
committerRichard Weinberger <richard@nod.at>2013-11-17 11:27:30 +0100
commitf72c22e45e8f8fe78c7f793d983bee5bed63497e (patch)
tree0e3051e2d357548d086a2ac00c4bfe201fe4e31d /arch/um/os-Linux/umid.c
parentum: Rewrite show_stack() (diff)
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um: Make stack trace reliable against kernel mode faults
As UML uses an alternative signal stack we cannot use the current stack pointer for stack dumping if UML itself dies by SIGSEGV. To bypass this issue we save regs taken from mcontext in our segv handler into thread_struct and use these regs to obtain the stack pointer in show_stack(). Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/um/os-Linux/umid.c')
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