Will Deacon b9a4b9d084 arm64: debug: Don't propagate UNKNOWN FAR into si_code for debug signals
FAR_EL1 is UNKNOWN for all debug exceptions other than those caused by
taking a hardware watchpoint. Unfortunately, if a debug handler returns
a non-zero value, then we will propagate the UNKNOWN FAR value to
userspace via the si_addr field of the SIGTRAP siginfo_t.

Instead, let's set si_addr to take on the PC of the faulting instruction,
which we have available in the current pt_regs.

Cc: <stable@vger.kernel.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2019-03-01 16:23:17 +00:00
..
2019-01-06 16:33:10 -08:00
2019-01-16 23:31:17 +09:00
2019-01-16 23:31:18 +09:00
2019-01-20 10:33:18 +12:00
2019-01-06 16:33:10 -08:00
2019-01-06 16:33:10 -08:00