uprobe programming on ARM Target - linux-kernel

Question

I want place a uprobe on target ARMV7 Board, i have uprobe_example.ko which is build against kernel 2.6.39.
insmod uprobe_example.ko vaddr=$vaddr pid=$!
Uprobes handles interesting events in the lifetime of the probed
+process, such as fork, clone, exec, and exit.
# insmod uprobe_example.ko pid=1461 vaddr=0x000084ac
[15245.267358] up: Unknown parameterpid'`
I want to Insert this module with the above parameters, it is not allowing.
/*
* Usage: insmod uprobe_example.ko pid=<pid> vaddr=<address> [verbose=0]
* where <pid> identifies the probed process and <address> is the virtual
* address of the probed instruction.
*/
static int pid = 0;
module_param(pid, int, 0);
MODULE_PARM_DESC(pid, “pid”);
static int verbose = 1;
module_param(verbose, int, 0);
MODULE_PARM_DESC(verbose, “verbose”);
static long vaddr = 0;
module_param(vaddr, long, 0);
MODULE_PARM_DESC(vaddr, “vaddr”);
static int nhits;
static struct uprobe usp;
static void uprobe_handler(struct uprobe *u, struct pt_regs *regs)
{
nhits++;
if (verbose)
printk(KERN_INFO “Hit #%d on probepoint at %#lx\n”,
nhits, u->vaddr);
}
int __init init_module(void)
{
int ret;
usp.pid = pid;
usp.vaddr = vaddr;
usp.handler = uprobe_handler;
printk(KERN_INFO “Registering uprobe on pid %d, vaddr %#lx\n”,
usp.pid, usp.vaddr);
ret = register_uprobe(&usp);
if (ret != 0) {
printk(KERN_ERR “register_uprobe() failed, returned %d\n”, ret);
return -1;
}
return 0;
}
void __exit cleanup_module(void)
{
printk(KERN_INFO “Unregistering uprobe on pid %d, vaddr %#lx\n”,
usp.pid, usp.vaddr);
printk(KERN_INFO “Probepoint was hit %d times\n”, nhits);
unregister_uprobe(&usp);
}
Make File
obj-m := uprobe_example.o
KERNELDIR ?= $(DLI_KERNEL)
PWD := $(shell pwd)
default:
$(MAKE) -C $(KERNELDIR) M=$(PWD) EXTRA_CFLAGS=-I`pwd` modules
#sync.sh up.ko
clean:
rm -f *.o *.ko *.mod.c *.symvers
rm -f trace/*.o arch/*.o

Answer 1

obj-m += uprobe_example.o
KERNELDIR ?= $(DLI_KERNEL)
all:
make -C $(KERNELDIR) M=$(PWD) modules
clean:
make -C $(KERNELDIR) M=$(PWD) clean
This Makefile will work fine, without any errors