Will Deacon 304ef4e836 arm64: signal: push the unwinding prologue on the signal stack ... To allow debuggers to unwind through signal frames, we create a fake stack unwinding prologue containing the link register and frame pointer of the interrupted context. The signal frame is then offset by 16 bytes to make room for the two saved registers which are pushed onto the frame of the *interrupted* context, rather than placed directly above the signal stack. This doesn't work when an alternative signal stack is set up for a SEGV handler, which is raised in response to RLIMIT_STACK being reached. In this case, we try to push the unwinding prologue onto the full stack and subsequently take a fault which we fail to resolve, causing setup_return to return -EFAULT and handle_signal to force_sigsegv on the current task. This patch fixes the problem by including the unwinding prologue as part of the rt_sigframe definition, which is populated during setup_sigframe, ensuring that it always ends up on the signal stack. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: <stable@vger.kernel.org>		2012-11-23 18:09:19 +00:00
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boot	arm64: Build infrastructure	2012-09-17 13:42:21 +01:00
configs	arm64: Build infrastructure	2012-09-17 13:42:21 +01:00
include	arm64: Include the clkdev.h generic header	2012-11-23 18:08:12 +00:00
kernel	arm64: signal: push the unwinding prologue on the signal stack	2012-11-23 18:09:19 +00:00
lib	arm64: Miscellaneous library functions	2012-09-17 13:42:18 +01:00
mm	arm64: mm: update max_dma32 before calculating size of NORMAL zone	2012-11-14 09:54:15 +00:00
Kconfig	arm64: Force use of common clk at architecture level	2012-11-20 10:04:22 +00:00
Kconfig.debug	arm64: Build infrastructure	2012-09-17 13:42:21 +01:00
Makefile	arm64: Build infrastructure	2012-09-17 13:42:21 +01:00