Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394...

[pandora-kernel.git] / arch / i386 / kernel / ptrace.c

diff --git a/arch/i386/kernel/ptrace.c b/arch/i386/kernel/ptrace.c
index f3f94ac..af8aabe 100644 (file)
--- a/arch/i386/kernel/ptrace.c
+++ b/arch/i386/kernel/ptrace.c
@@ -45,7 +45,7 @@
 /*
  * Offset of eflags on child stack..
  */
-#define EFL_OFFSET ((EFL-2)*4-sizeof(struct pt_regs))
+#define EFL_OFFSET offsetof(struct pt_regs, eflags)
 
 static inline struct pt_regs *get_child_regs(struct task_struct *task)
 {
@@ -54,24 +54,24 @@ static inline struct pt_regs *get_child_regs(struct task_struct *task)
 }
 
 /*
- * this routine will get a word off of the processes privileged stack. 
- * the offset is how far from the base addr as stored in the TSS.  
- * this routine assumes that all the privileged stacks are in our
+ * This routine will get a word off of the processes privileged stack.
+ * the offset is bytes into the pt_regs structure on the stack.
+ * This routine assumes that all the privileged stacks are in our
  * data space.
  */   
 static inline int get_stack_long(struct task_struct *task, int offset)
 {
        unsigned char *stack;
 
-       stack = (unsigned char *)task->thread.esp0;
+       stack = (unsigned char *)task->thread.esp0 - sizeof(struct pt_regs);
        stack += offset;
        return (*((int *)stack));
 }
 
 /*
- * this routine will put a word on the processes privileged stack. 
- * the offset is how far from the base addr as stored in the TSS.  
- * this routine assumes that all the privileged stacks are in our
+ * This routine will put a word on the processes privileged stack.
+ * the offset is bytes into the pt_regs structure on the stack.
+ * This routine assumes that all the privileged stacks are in our
  * data space.
  */
 static inline int put_stack_long(struct task_struct *task, int offset,
@@ -79,7 +79,7 @@ static inline int put_stack_long(struct task_struct *task, int offset,
 {
        unsigned char * stack;
 
-       stack = (unsigned char *) task->thread.esp0;
+       stack = (unsigned char *)task->thread.esp0 - sizeof(struct pt_regs);
        stack += offset;
        *(unsigned long *) stack = data;
        return 0;
@@ -114,7 +114,7 @@ static int putreg(struct task_struct *child,
        }
        if (regno > ES*4)
                regno -= 1*4;
-       put_stack_long(child, regno - sizeof(struct pt_regs), value);
+       put_stack_long(child, regno, value);
        return 0;
 }
 
@@ -137,7 +137,6 @@ static unsigned long getreg(struct task_struct *child,
                default:
                        if (regno > ES*4)
                                regno -= 1*4;
-                       regno = regno - sizeof(struct pt_regs);
                        retval &= get_stack_long(child, regno);
        }
        return retval;