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example/syscall: Fix typo and unmatch types

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This commit is contained in:
linD026 2022-12-25 12:33:52 +08:00
parent 0decb83073
commit 6062f64bcf
1 changed files with 5 additions and 4 deletions
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9
examples/syscall.c
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@ -75,7 +75,7 @@ module_param(uid, int, 0644);
* Another reason for this is that we can not get sys_open. * Another reason for this is that we can not get sys_open.
* It is a static variable, so it is not exported. * It is a static variable, so it is not exported.
*/ */
static asmlinkage int (*original_call)(const char *, int, int); static asmlinkage int (*original_call)(const char __user *, int, umode_t);
/* The function we will replace sys_open (the function called when you /* The function we will replace sys_open (the function called when you
* call the open system call) with. To find the exact prototype, with * call the open system call) with. To find the exact prototype, with
@ -87,7 +87,8 @@ static asmlinkage int (*original_call)(const char *, int, int);
* wreck havoc and require programs to be recompiled, since the system * wreck havoc and require programs to be recompiled, since the system
* calls are the interface between the kernel and the processes). * calls are the interface between the kernel and the processes).
*/ */
static asmlinkage int our_sys_open(const char *filename, int flags, int mode) static asmlinkage int our_sys_open(const char __user *filename, int flags,
umode_t mode)
{ {
int i = 0; int i = 0;
char ch; char ch;
@ -107,7 +108,7 @@ static asmlinkage int our_sys_open(const char *filename, int flags, int mode)
return original_call(filename, flags, mode); return original_call(filename, flags, mode);
} }
static unsigned long **aquire_sys_call_table(void) static unsigned long **acquire_sys_call_table(void)
{ {
#ifdef HAVE_KSYS_CLOSE #ifdef HAVE_KSYS_CLOSE
unsigned long int offset = PAGE_OFFSET; unsigned long int offset = PAGE_OFFSET;
@ -185,7 +186,7 @@ static void disable_write_protection(void)
static int __init syscall_start(void) static int __init syscall_start(void)
{ {
if (!(sys_call_table = aquire_sys_call_table())) if (!(sys_call_table = acquire_sys_call_table()))
return -1; return -1;
disable_write_protection(); disable_write_protection();