Have you solved it？？And how ？
On Sun, May 27, 2012 at 3:20 PM, Vladimir Murzin <murzi...@gmail.com> wrote:
> On Wed, May 09, 2012 at 10:45:52PM -0700, scott wrote:
>> Here is a loadable kernel module for HTC Sensation XL (runnymede-
>> crc-2.6.35).
>>
>> /*
>> * mydebug.c
>> * System Call sys_open dubugging
>> */
>>
>> #include <linux/kernel.h> /* Needed for KERN_INFO */
>> #include <linux/module.h> /* Needed by all modules */
>> #include <linux/init.h> /* Needed for macros */
>> #include <asm/unistd.h>
>> #include <linux/linkage.h>
>> #include <generated/autoconf.h>
>> #include <linux/in.h>
>> #include <linux/init_task.h>
>> #include <linux/ip.h>
>> #include <linux/kernel.h>
>> #include <linux/kmod.h>
>> #include <linux/mm.h>
>>
>> #include <linux/skbuff.h>
>> #include <linux/workqueue.h>
>>
>> #include <linux/sched.h>
>> #include <linux/stddef.h>
>> #include <linux/string.h>
>> #include <linux/syscalls.h>
>> #include <linux/tcp.h>
>> #include <linux/types.h>
>> #include <linux/version.h>
>>
>>
>> asmlinkage ssize_t (*orig_open)(const char *pathname, int flags);
>>
>> asmlinkage ssize_t hooked_open(const char *pathname, int flags)
>> {
>> printk(KERN_INFO "SYS_OPEN: %s\n", pathname);
>> return orig_open(pathname, flags);
>> }
>>
>> static int __init root_start(void)
>> {
>> unsigned long sys_addr = 0xc003b104; /* System.map */
>> unsigned long *sys_call_table= (unsigned long *)sys_addr;
>>
>> orig_open = sys_call_table[__NR_open];
>> sys_call_table[__NR_open] = hooked_open;
>> return 0;
>> }
>>
>> static void __exit root_stop(void)
>> {
>>
>> unsigned long sys_addr = 0xc003b104;
>> unsigned long *sys_call_table= (unsigned long *)sys_addr;
>>
>> sys_call_table[__NR_open] = &orig_open;
>> }
>>
>> module_init(root_start);
>> module_exit(root_stop);
>>
>> -------
>> When I buid it, the error shows below,
>>
>> make -C /home/scott/runnymede-crc-2.6.35/ M=`pwd` ARCH=arm
>> CROSS_COMPILE=~/android-ndk-r7b/toolchains/arm-linux-androideabi-4.4.3/
>> prebuilt/linux-x86/bin/arm-linux-androideabi- modules
>> make[1]: Entering directory `<home>/runnymede-crc-2.6.35'
>> CC [M] /<home>/workspace/debugkit/mydebug.o
>> cc1: warnings being treated as errors
>> /<home>/workspace/debugkit/mydebug.c: In function 'root_start':
>> /<home>/workspace/debugkit/mydebug.c:44: error: assignment makes
>> pointer from integer without a cast
>> /<home>/workspace/debugkit/mydebug.c:45: error: assignment makes
>> integer from pointer without a cast
>> /<home>/workspace/debugkit/mydebug.c: In function 'root_stop':
>> /<home>/workspace/debugkit/mydebug.c:55: error: assignment makes
>> integer from pointer without a cast
>> make[2]: *** [/<home>/workspace/debugkit/mydebug.o] Error 1
>> make[1]: *** [_module_/<home>/workspace/debugkit] Error 2
>> make[1]: Leaving directory `/home/scott/runnymede-crc-2.6.35'
>> make: *** [default] Error 2
>>
>> Anyone can give me a help for it?
>>
>> --
>> unsubscribe: android-kernel+unsubscr...@googlegroups.com
>> website: http://groups.google.com/group/android-kernel
>
>
> First of all your build environment make all warnings into errors
> (-Werror) and compiler has already worn you about that: "cc1: warnings
> being treated as errors",
> To understand reasons for these warnings quickly just bare in mind that
> sys_call_table is array of unsigned long, but you are trying to
> substitute some entries with pointers to functions and vise versa ;)
>
> Hope this helps.
>
> Best wishes
> Vladimir Murzin
>
> --
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> website: http://groups.google.com/group/android-kernel
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