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| author | Will Deacon <will.deacon@arm.com> | 2019-03-01 13:28:00 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2019-03-01 16:23:17 +0000 |
| commit | b9a4b9d084d978f80eb9210727c81804588b42ff (patch) | |
| tree | fcaf5289b28a6782441211facb51f65d02f1f196 /arch/arm64/kernel/probes | |
| parent | 3cd0ddb3deec43bd1cfcdd39d3dde37a0135d0c6 (diff) | |
| download | linux-b9a4b9d084d978f80eb9210727c81804588b42ff.tar.bz2 | |
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>
Diffstat (limited to 'arch/arm64/kernel/probes')
0 files changed, 0 insertions, 0 deletions