lkml.org 
[lkml]   [2007]   [Dec]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[patch-early-RFC 05/10] LTTng instrumentation PPC
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
---
arch/ppc/kernel/misc.S | 2 +-
arch/ppc/kernel/time.c | 4 ++++
arch/ppc/kernel/traps.c | 3 +++
arch/ppc/mm/fault.c | 3 +++
4 files changed, 11 insertions(+), 1 deletion(-)
Index: linux-2.6-lttng/arch/ppc/kernel/misc.S
===================================================================
--- linux-2.6-lttng.orig/arch/ppc/kernel/misc.S 2007-11-13 09:25:23.000000000 -0500
+++ linux-2.6-lttng/arch/ppc/kernel/misc.S 2007-11-13 09:50:11.000000000 -0500
@@ -868,7 +868,7 @@ _GLOBAL(_get_SP)
* Create a kernel thread
* kernel_thread(fn, arg, flags)
*/
-_GLOBAL(kernel_thread)
+_GLOBAL(original_kernel_thread)
stwu r1,-16(r1)
stw r30,8(r1)
stw r31,12(r1)
Index: linux-2.6-lttng/arch/ppc/kernel/time.c
===================================================================
--- linux-2.6-lttng.orig/arch/ppc/kernel/time.c 2007-11-13 09:25:23.000000000 -0500
+++ linux-2.6-lttng/arch/ppc/kernel/time.c 2007-11-13 09:50:11.000000000 -0500
@@ -139,7 +139,10 @@ void timer_interrupt(struct pt_regs * re
if (atomic_read(&ppc_n_lost_interrupts) != 0)
do_IRQ(regs);

+ trace_mark(kernel_arch_trap_entry, "trap_id %ld ip #p%ld",
+ regs->trap, instruction_pointer(regs));
old_regs = set_irq_regs(regs);
+
irq_enter();

while ((next_dec = tb_ticks_per_jiffy - tb_delta(&jiffy_stamp)) <= 0) {
@@ -192,6 +195,7 @@ void timer_interrupt(struct pt_regs * re

irq_exit();
set_irq_regs(old_regs);
+ trace_mark(kernel_arch_trap_exit, MARK_NOARGS);
}

/*
Index: linux-2.6-lttng/arch/ppc/kernel/traps.c
===================================================================
--- linux-2.6-lttng.orig/arch/ppc/kernel/traps.c 2007-11-13 09:25:23.000000000 -0500
+++ linux-2.6-lttng/arch/ppc/kernel/traps.c 2007-11-13 09:50:11.000000000 -0500
@@ -108,11 +108,14 @@ void _exception(int signr, struct pt_reg
debugger(regs);
die("Exception in kernel mode", regs, signr);
}
+ trace_mark(kernel_arch_trap_entry, "trap_id %ld ip #p%ld", regs->trap,
+ instruction_pointer(regs));
info.si_signo = signr;
info.si_errno = 0;
info.si_code = code;
info.si_addr = (void __user *) addr;
force_sig_info(signr, &info, current);
+ trace_mark(kernel_arch_trap_exit, MARK_NOARGS);

/*
* Init gets no signals that it doesn't have a handler for.
Index: linux-2.6-lttng/arch/ppc/mm/fault.c
===================================================================
--- linux-2.6-lttng.orig/arch/ppc/mm/fault.c 2007-11-13 09:25:23.000000000 -0500
+++ linux-2.6-lttng/arch/ppc/mm/fault.c 2007-11-13 09:50:11.000000000 -0500
@@ -250,7 +250,10 @@ good_area:
* the fault.
*/
survive:
+ trace_mark(kernel_arch_trap_entry, "trap_id %ld ip #p%ld",
+ regs->trap, instruction_pointer(regs));
fault = handle_mm_fault(mm, vma, address, is_write);
+ trace_mark(kernel_arch_trap_exit, MARK_NOARGS);
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM)
goto out_of_memory;
--
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68


\
 
 \ /
  Last update: 2007-12-06 04:03    [from the cache]
©2003-2014 Jasper Spaans. Advertise on this site