[PATCH] SAMPLES: kprobe_example: Make it print something on ARM.

From: Wang Long
Date: Tue Feb 03 2015 - 22:01:57 EST


This KProbes example is a little useless if it doesn't print anything.
For ARM print similar messages to those produced on x86 and PPC.

Signed-off-by: Wang Long <long.wanglong@xxxxxxxxxx>
---
samples/kprobes/kprobe_example.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/samples/kprobes/kprobe_example.c b/samples/kprobes/kprobe_example.c
index 366db1a..eba9f1a 100644
--- a/samples/kprobes/kprobe_example.c
+++ b/samples/kprobes/kprobe_example.c
@@ -42,6 +42,11 @@ static int handler_pre(struct kprobe *p, struct pt_regs *regs)
" ex1 = 0x%lx\n",
p->addr, regs->pc, regs->ex1);
#endif
+#ifdef CONFIG_ARM
+ printk(KERN_INFO "pre_handler: p->addr = 0x%p, ARM_pc = 0x%lx,"
+ " ARM_cpsr = 0x%lx\n",
+ p->addr, regs->ARM_pc, regs->ARM_cpsr);
+#endif

/* A dump_stack() here will give a stack backtrace */
return 0;
@@ -67,6 +72,10 @@ static void handler_post(struct kprobe *p, struct pt_regs *regs,
printk(KERN_INFO "post_handler: p->addr = 0x%p, ex1 = 0x%lx\n",
p->addr, regs->ex1);
#endif
+#ifdef CONFIG_ARM
+ printk(KERN_INFO "post_handler: p->addr = 0x%p, ARM_cpsr = 0x%lx\n",
+ p->addr, regs->ARM_cpsr);
+#endif
}

/*
--
1.8.3.4

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