restrict reading from /proc/<pid>/maps to those who share ->mm or can ptrace pid

[safe/jmp/linux-2.6] / include / linux / ptrace.h

diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h
index dc6f364..3ea5750 100644 (file)
--- a/include/linux/ptrace.h
+++ b/include/linux/ptrace.h
@@ -16,12 +16,10 @@
 #define PTRACE_KILL               8
 #define PTRACE_SINGLESTEP         9
 
-#define PTRACE_ATTACH          0x10
-#define PTRACE_DETACH          0x11
+#define PTRACE_ATTACH            16
+#define PTRACE_DETACH            17
 
 #define PTRACE_SYSCALL           24
-#define PTRACE_SYSEMU            31
-#define PTRACE_SYSEMU_SINGLESTEP  32
 
 /* 0x4200-0x4300 are reserved for architecture-independent additions.  */
 #define PTRACE_SETOPTIONS      0x4200
@@ -53,6 +51,10 @@
 #ifdef __KERNEL__
 /*
  * Ptrace flags
+ *
+ * The owner ship rules for task->ptrace which holds the ptrace
+ * flags is simple.  When a task is running it owns it's task->ptrace
+ * flags.  When the a task is stopped the ptracer owns task->ptrace.
  */
 
 #define PT_PTRACED     0x00000001
@@ -78,6 +80,10 @@
 #include <linux/compiler.h>            /* For unlikely.  */
 #include <linux/sched.h>               /* For struct task_struct.  */
 
+
+extern long arch_ptrace(struct task_struct *child, long request, long addr, long data);
+extern struct task_struct *ptrace_get_task_struct(pid_t pid);
+extern int ptrace_traceme(void);
 extern int ptrace_readdata(struct task_struct *tsk, unsigned long src, char __user *dst, int len);
 extern int ptrace_writedata(struct task_struct *tsk, char __user *src, unsigned long dst, int len);
 extern int ptrace_attach(struct task_struct *tsk);
@@ -91,6 +97,7 @@ extern void __ptrace_link(struct task_struct *child,
 extern void __ptrace_unlink(struct task_struct *child);
 extern void ptrace_untrace(struct task_struct *child);
 extern int ptrace_may_attach(struct task_struct *task);
+extern int __ptrace_may_attach(struct task_struct *task);
 
 static inline void ptrace_link(struct task_struct *child,
                               struct task_struct *new_parent)
@@ -104,6 +111,8 @@ static inline void ptrace_unlink(struct task_struct *child)
                __ptrace_unlink(child);
 }
 
+int generic_ptrace_peekdata(struct task_struct *tsk, long addr, long data);
+int generic_ptrace_pokedata(struct task_struct *tsk, long addr, long data);
 
 #ifndef force_successful_syscall_return
 /*