linux-stable.git/arch/arm/kernel/entry-common.S, branch v3.6.7

ARM: 7475/1: sys_trace: allow all syscall arguments to be updated via ptrace

2012-07-28T10:11:53+00:00

Prior to syscall invocation, __sys_trace only reloads r0-r3 from the
kernel stack, preventing the debugger from updating arguments 5-7 when
signalled via ptrace.

This patch updates the code to reload r0-r6, updating arguments 5 and 6
on the stack (argument 7 is only used by OABI indirect syscalls and
can remain in a register).

Reported-by: Al Viro 
Signed-off-by: Will Deacon 
Signed-off-by: Russell King

ARM: 7474/1: get rid of TIF_SYSCALL_RESTARTSYS

2012-07-28T10:11:52+00:00

just let do_work_pending() return 1 on normal local restarts and
-1 on those that had been caused by ERESTART_RESTARTBLOCK (and 0
is still "all done, sod off to userland now").  And let the asm
glue flip scno to restart_syscall(2) one if it got negative from
us...

[will: resolved conflicts with audit fixes]

Signed-off-by: Al Viro 
Signed-off-by: Will Deacon 
Signed-off-by: Russell King

ARM: 7473/1: deal with handlerless restarts without leaving the kernel

2012-07-28T10:11:52+00:00

Signed-off-by: Al Viro 
Signed-off-by: Will Deacon 
Signed-off-by: Russell King

ARM: 7472/1: pull all work_pending logics into C function

2012-07-28T10:11:52+00:00

Signed-off-by: Al Viro 
Signed-off-by: Will Deacon 
Signed-off-by: Russell King

ARM: 7456/1: ptrace: provide separate functions for tracing syscall {entry,exit}

2012-07-09T16:44:14+00:00

The syscall_trace on ARM takes a `why' parameter to indicate whether or
not we are entering or exiting a system call. This can be confusing for
people looking at the code since (a) it conflicts with the why register
alias in the entry assembly code and (b) it is not immediately clear
what it represents.

This patch splits up the syscall_trace function into separate wrappers
for syscall entry and exit, allowing the low-level syscall handling
code to branch to the appropriate function.

Reported-by: Al Viro 
Reviewed-by: Catalin Marinas 
Signed-off-by: Will Deacon 
Signed-off-by: Russell King

ARM: 7454/1: entry: don't bother with syscall tracing on ret_from_fork path

2012-07-09T16:44:12+00:00

ret_from_fork is setup for a freshly spawned child task via copy_thread,
called from copy_process. The latter function clears TIF_SYSCALL_TRACE
and also resets the child task's audit_context to NULL, meaning that
there is little point invoking the system call tracing routines.
Furthermore, getting hold of the syscall number is a complete pain and
it looks like the current code doesn't even bother.

This patch removes the syscall tracing checks from ret_from_fork.

Reviewed-by: Catalin Marinas 
Signed-off-by: Will Deacon 
Signed-off-by: Russell King

Merge branch 'for-arm' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal.git into for-linus

2012-05-29T21:13:55+00:00

Conflicts:
	arch/arm/kernel/ptrace.c

arm: if we get into work_pending while returning to kernel mode, just go away

2012-05-21T18:38:24+00:00

checking in do_signal() is pointless - if we get there with !user_mode(regs)
(and we might), we'll end up looping indefinitely.  Check in work_pending
and break out of the loop if so.

Acked-by: Russell King 
Signed-off-by: Al Viro

arm: trim _TIF_WORK_MASK, get rid of useless test and branch...

2012-05-21T18:36:32+00:00

Acked-by: Russell King 
Signed-off-by: Al Viro

ARM: Remove support for ARMv3 ARM610 and ARM710 CPUs

2012-05-05T04:50:50+00:00

This patch removes support for ARMv3 CPUs, which haven't worked properly
for quite some time (see the FIXME comment in arch/arm/mm/fault.c).  The
only V3 parts left is the cache model for ARMv3, which is needed for some
odd reason by ARM740T CPUs, and being able to build with -march=armv3,
which is required for the RiscPC platform due to its bus structure.

Acked-by: Will Deacon 
Acked-by: Jean-Christophe PLAGNIOL-VILLARD 
Signed-off-by: Russell King