linux-toradex.git/arch/tile/kernel/ptrace.c, branch v3.10.94

arch/tile: Fix syscall return value passed to tracepoint

2013-04-24T20:45:55+00:00

Currently the syscall number is passed, but it should be the return
value, which is kept in r0.

Signed-off-by: Simon Marchi 
Signed-off-by: Chris Metcalf  [using a raw 0 value]

tile: support TIF_SYSCALL_TRACEPOINT; select HAVE_SYSCALL_TRACEPOINTS

2013-03-22T19:46:18+00:00

This patch adds support for the TIF_SYSCALL_TRACEPOINT on the tile
architecture. Basically, it calls the appropriate tracepoints on syscall
entry and exit.

Signed-off-by: Simon Marchi 
Signed-off-by: Chris Metcalf

arch/tile: Call tracehook_report_syscall_{entry,exit} in syscall trace

2013-03-21T19:39:34+00:00

Call tracehook functions for syscall tracing.

The check for TIF_SYSCALL_TRACE was removed, because the same check is
done right before in the assembly file.

Signed-off-by: Simon Marchi 
Signed-off-by: Chris Metcalf  [with ptrace.h fixup]

arch/tile: implement arch_ptrace using user_regset on tile

2012-12-18T19:53:14+00:00

This patch changes arch_ptrace on tile so that it uses user_regset
to implement the PTRACE_GETREGS and PTRACE_SETREGS operations.

Signed-off-by: Simon Marchi 
Signed-off-by: Chris Metcalf

arch/tile: implement user_regset interface on tile

2012-12-18T19:53:06+00:00

This is a basic implementation of user_regset for the tile
architecture. It reuses the basic blocks that were already there.

Signed-off-by: Simon Marchi 
Signed-off-by: Chris Metcalf

arch/tile: clean up tile-specific PTRACE_SETOPTIONS

2012-12-14T17:56:54+00:00

Use the newer idioms for setting PTRACE_O_xxx and PT_TRACE_xxx flags.
Only set/clear tile-specific flags if the generic routine returns
success, since otherwise we want to avoid setting any flags at all.
Atomically update the ptrace flags with the new values.  Eliminate
the PT_TRACE_MASK_TILE bitmask and just shift PTRACE_O_MASK_TILE.
Add a BUILD_BUG_ON to avoid overlapping with generic bits.

Acked-by: Oleg Nesterov 
Signed-off-by: Chris Metcalf

arch/tile: provide PT_FLAGS_COMPAT value in pt_regs

2012-12-13T16:34:24+00:00

This flag is set for ptrace GETREGS or PEEKUSER for processes
that are COMPAT, i.e. 32-bit.  This allows things like strace
to easily discover what personality to use, for example.

Acked-by: Oleg Nesterov 
Signed-off-by: Chris Metcalf

arch/tile: don't allow user code to set the PL via ptrace or signal return

2010-11-01T19:31:17+00:00

The kernel was allowing any component of the pt_regs to be updated either
by signal handlers writing to the stack, or by processes writing via
PTRACE_POKEUSR or PTRACE_SETREGS, which meant they could set their PL
up from 0 to 1 and get access to kernel code and data (or, in practice,
cause a kernel panic).  We now always reset the ex1 field, allowing the
user to set their ICS bit only.

Signed-off-by: Chris Metcalf

ptrace: cleanup arch_ptrace() on tile

2010-10-28T01:03:12+00:00

Remove checking @addr less than 0 because @addr is now unsigned.

Signed-off-by: Namhyung Kim 
Acked-by: Chris Metcalf 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ptrace: change signature of arch_ptrace()

2010-10-28T01:03:10+00:00

Fix up the arguments to arch_ptrace() to take account of the fact that
@addr and @data are now unsigned long rather than long as of a preceding
patch in this series.

Signed-off-by: Namhyung Kim 
Cc: 
Acked-by: Roland McGrath 
Acked-by: David Howells 
Acked-by: Geert Uytterhoeven 
Acked-by: David S. Miller 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds