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Subject[PATCH 3/3] Initialize and use trec_snapshot and trec_print_snapshot.
Date
Trec's are initialized early in main.c and then dump
trec's in die(), panic() and do_page_fault().

Signed-off-by: Wink Saville <wink@saville.com>
---
arch/x86_64/kernel/traps.c | 5 +++++
arch/x86_64/mm/fault.c | 6 ++++++
init/main.c | 4 ++++
kernel/panic.c | 5 +++++
4 files changed, 20 insertions(+), 0 deletions(-)
diff --git a/arch/x86_64/kernel/traps.c b/arch/x86_64/kernel/traps.c
index 09d2e8a..b4f1a36 100644
--- a/arch/x86_64/kernel/traps.c
+++ b/arch/x86_64/kernel/traps.c
@@ -32,6 +32,7 @@
#include <linux/unwind.h>
#include <linux/uaccess.h>
#include <linux/bug.h>
+#include <linux/trec.h>

#include <asm/system.h>
#include <asm/io.h>
@@ -547,9 +548,13 @@ void die(const char * str, struct pt_regs * regs, long err)
{
unsigned long flags = oops_begin();

+ trec_snapshot();
+
if (!user_mode(regs))
report_bug(regs->rip);

+ trec_print_snapshot();
+
__die(str, regs, err);
oops_end(flags);
do_exit(SIGSEGV);
diff --git a/arch/x86_64/mm/fault.c b/arch/x86_64/mm/fault.c
index 6ada723..e92f6bc 100644
--- a/arch/x86_64/mm/fault.c
+++ b/arch/x86_64/mm/fault.c
@@ -24,6 +24,7 @@
#include <linux/module.h>
#include <linux/kprobes.h>
#include <linux/uaccess.h>
+#include <linux/trec.h>

#include <asm/system.h>
#include <asm/pgalloc.h>
@@ -535,6 +536,8 @@ no_context:

flags = oops_begin();

+ trec_snapshot();
+
if (address < PAGE_SIZE)
printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference");
else
@@ -548,6 +551,9 @@ no_context:
__die("Oops", regs, error_code);
/* Executive summary in case the body of the oops scrolled away */
printk(KERN_EMERG "CR2: %016lx\n", address);
+
+ trec_print_snapshot();
+
oops_end(flags);
do_exit(SIGKILL);

diff --git a/init/main.c b/init/main.c
index a92989e..46bc440 100644
--- a/init/main.c
+++ b/init/main.c
@@ -54,6 +54,7 @@
#include <linux/lockdep.h>
#include <linux/pid_namespace.h>
#include <linux/device.h>
+#include <linux/trec.h>

#include <asm/io.h>
#include <asm/bugs.h>
@@ -517,6 +518,9 @@ asmlinkage void __init start_kernel(void)
early_boot_irqs_off();
early_init_irq_lock_class();

+ trec_init();
+ TREC0();
+
/*
* Interrupts are still disabled. Do necessary setups, then
* enable them
diff --git a/kernel/panic.c b/kernel/panic.c
index 623d182..52812f2 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -19,6 +19,7 @@
#include <linux/nmi.h>
#include <linux/kexec.h>
#include <linux/debug_locks.h>
+#include <linux/trec.h>

int panic_on_oops;
int tainted;
@@ -66,6 +67,8 @@ NORET_TYPE void panic(const char * fmt, ...)
unsigned long caller = (unsigned long) __builtin_return_address(0);
#endif

+ trec_snapshot();
+
/*
* It's possible to come here directly from a panic-assertion and not
* have preempt disabled. Some functions called from here want
@@ -96,6 +99,8 @@ NORET_TYPE void panic(const char * fmt, ...)
smp_send_stop();
#endif

+ trec_print_snapshot();
+
atomic_notifier_call_chain(&panic_notifier_list, 0, buf);

if (!panic_blink)
--
1.5.0.rc2
-
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