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  1. 20 8月, 2009 12 次提交
  3. 19 8月, 2009 2 次提交
  5. 18 8月, 2009 6 次提交
  7. 16 8月, 2009 3 次提交
    • M
      sh: Add support for DWARF GNU extensions · cd7246f0
      由 Matt Fleming 提交于 
      Also, remove the "fix" to DW_CFA_def_cfa_register where we reset the
frame's cfa_offset to 0. This action is incorrect when handling
DW_CFA_def_cfa_register as the DWARF spec specifically states that the
previous contents of cfa_offset should be used with the new
register. The reason that I thought cfa_offset should be reset to 0 was
because it was being assigned a bogus value prior to executing the
DW_CFA_def_cfa_register op. It turns out that the bogus cfa_offset value
came from interpreting .cfi_escape pseudo-ops (those used by the GNU
extensions) as CFA_DW_def_cfa ops.
Signed-off-by: NMatt Fleming <matt@console-pimps.org>
      cd7246f0
    • M
      sh: Try again at getting the initial return address for an unwind · b955873b
      由 Matt Fleming 提交于 
      The previous hack for calculating the return address for the first frame
we unwind (dwarf_unwinder_dump) didn't always work. The problem was that
it assumed once it read the rule for calculating the return address,
there would be no new rules for calculating it. This isn't true because
the way in which the CFA is calculated can change as you progress
through a function and the return address is figured out using the
CFA. Therefore, the way to calculate the return address can change.

So, instead of using some offset from the beginning of
dwarf_unwind_stack which is just a flakey approach, and instead of
executing instructions from the FDE until the return address is setup,
we now figure out the pc in dwarf_unwind_stack() just before we call
dwarf_cfa_execute_insns().
Signed-off-by: NMatt Fleming <matt@console-pimps.org>
      b955873b
    • P
      sh: Merge the _32/_64 variants of arch/sh/kernel/Makefile. · 38f9ddf4
      由 Paul Mundt 提交于 
      This uses the BITS export as per x86 in order to allow the same Makefile
to be used.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      38f9ddf4
  9. 15 8月, 2009 11 次提交
  11. 14 8月, 2009 6 次提交
    • P
      sh: unwinder: Convert frame allocations to GFP_ATOMIC. · 0fc11e36
      由 Paul Mundt 提交于 
      save_stack_trace_tsk() and friends can be called from atomic context (as
triggered by latencytop), and subsequently hit two problematic allocation
points that were using GFP_KERNEL (these were dwarf_unwind_stack() and
dwarf_frame_alloc_regs()). Convert these over to GFP_ATOMIC and get
latencytop working with the DWARF unwinder.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      0fc11e36
    • L
      Linux 2.6.31-rc6 · 64f1607f
      由 Linus Torvalds 提交于
      64f1607f
    • L
      genirq: prevent wakeup of freed irq thread · 2d860ad7
      由 Linus Torvalds 提交于 
      free_irq() can remove an irqaction while the corresponding interrupt
is in progress, but free_irq() sets action->thread to NULL
unconditionally, which might lead to a NULL pointer dereference in
handle_IRQ_event() when the hard interrupt context tries to wake up
the handler thread.

Prevent this by moving the thread stop after synchronize_irq(). No
need to set action->thread to NULL either as action is going to be
freed anyway.

This fixes a boot crash reported against preempt-rt which uses the
mainline irq threads code to implement full irq threading.

[ tglx: removed local irqthread variable ]
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
      2d860ad7
    • P
      Merge branch 'sh/dwarf-unwinder' · 718dbf37
      由 Paul Mundt 提交于
      718dbf37
    • M
      sh: Delete DWARF_ARCH_UNWIND_OFFSET · f8264667
      由 Matt Fleming 提交于 
      Trying to figure out the best value for DWARF_ARCH_UNWIND_OFFSET is
tricky at best. Various things can change the size (and offset from the
beginning of the function) of the prologue. Notably, turning on ftrace
adds calls to mcount at the beginning of functions, thereby pushing the
prologue further into the function.

So replace DWARF_ARCH_UNWIND_OFFSET with some code that continues to
execute CFA instructions until the value of return address register is
defined. This is safe to do because we know that the return address must
have been pushed onto the frame before our first function call; we just
can't figure out where at compile-time.
Signed-off-by: NMatt Fleming <matt@console-pimps.org>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      f8264667
    • P
      sh: oprofile: Kill off dead valid_kernel_stack(). · f54aab4a
      由 Paul Mundt 提交于 
      This is no longer used, kill it off.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      f54aab4a