kernel.git/arch/arm/kernel/traps.c, branch linux-3.17.y

ARM: 8226/1: cacheflush: get rid of restarting block

2014-12-06T23:57:29Z

commit 3f4aa45ceea5789a4aade536acc27f2e0d3da5e1 upstream. We cannot restart cacheflush safely if a process provides user-defined signal handler and signal is pending. In this case -EINTR is returned and it is expected that process re-invokes syscall. However, there are a few problems with that: * looks like nobody bothers checking return value from cacheflush * but if it did, we don't provide the restart address for that, so the process has to use the same range again * ...and again, what might lead to looping forever So, remove cacheflush restarting code and terminate cache flushing as early as fatal signal is pending. Reported-by: Chanho Min Signed-off-by: Vladimir Murzin Acked-by: Will Deacon Signed-off-by: Russell King Signed-off-by: Greg Kroah-Hartman

ARM: 8148/1: flush TLS and thumbee register state during exec

2014-09-16T15:09:32Z

The TPIDRURO and TPIDRURW registers need to be flushed during exec; otherwise TLS information is potentially leaked. TPIDRURO in particular needs careful treatment. Since flush_thread basically needs the same code used to set the TLS in arm_syscall, pull that into a common set_tls helper in tls.h and use it in both places. Similarly, TEEHBR needs to be cleared during exec as well. Clearing its save slot in thread_info isn't right as there is no guarantee that a thread switch will occur before the new program runs. Just setting the register directly is sufficient. Signed-off-by: Nathan Lynch Acked-by: Will Deacon Cc: Signed-off-by: Russell King

ARM: 8074/1: traps: Make use of the frame_pointer macro

2014-07-18T11:29:18Z

Use the newly-introduced frame_pointer macro to extract the correct FP based on whether we are in THUMB2 mode or not. Signed-off-by: Nikolay Borisov Acked-by: Will Deacon Signed-off-by: Russell King

Dump the registers on undefined instruction userspace faults

2014-04-11T13:48:39Z

Signed-off-by: Russell King

Merge branches 'amba', 'fixes', 'kees', 'misc' and 'unstable/sa11x0' into for-next

2014-01-21T21:26:33Z

ARM: 7939/1: traps: fix opcode endianness when read from user memory

2014-01-11T12:06:59Z

Currently code has an inverted logic: opcode from user memory is swapped to a proper endianness only in case of read error. While normally opcode should be swapped only if it was read correctly from user memory. Reviewed-by: Victor Kamensky Signed-off-by: Ben Dooks Signed-off-by: Taras Kondratiuk Signed-off-by: Russell King

ARM: fix "bad mode in ... handler" message for undefined instructions

2014-01-05T14:00:00Z

The array was missing the final entry for the undefined instruction exception handler; this commit adds it. Cc: Signed-off-by: Russell King

ARM: make kernel oops easier to read

2013-12-29T12:32:30Z

We don't need the offset for the first function name in each backtrace entry; this needlessly consumes screen space. This is virtually always the first or second instruction in the called function. Also, recognise stmfd instructions which include r10 as a valid stack saving instruction, and when dumping the registers, dump six registers per line rather than five, and fix the wrapping. Signed-off-by: Russell King

ARM: 7917/1: cacheflush: correctly limit range of memory region being flushed

2013-12-09T23:24:35Z

The __do_cache_op function operates with a 'chunk' size of one page but fails to limit the size of the final chunk so as to not exceed the specified memory region. Fix this. Cc: Reported-by: Christian Gmeiner Tested-by: Christian Gmeiner Acked-by: Will Deacon Signed-off-by: Jon Medhurst Signed-off-by: Russell King

ARM: 7892/1: Fix warning for V7M builds

2013-11-19T00:41:03Z

Fixes a harmless warning when building for V7M (!MMU): arch/arm/kernel/traps.c:859:123: warning: 'kuser_init' defined but not used [-Wunused-function] By making the stub static inline instead of just static. Fixes: f6f91b0d9fd9 ('ARM: allow kuser helpers to be removed from the vector page') Signed-off-by: Olof Johansson Signed-off-by: Russell King