---

yaml --- r: 78 b: refs/heads/master c: f1290ec h: refs/heads/master v: v3
git-mirror · Apr 16, 2005 · e1b26e5 · e1b26e5
1 parent 39c7421
commit e1b26e5
Show file tree

Hide file tree

Showing 3 changed files with 11 additions and 8 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: e502cdd63de666832b3b65017bb607c22d2868de
+refs/heads/master: f1290ec93e5da4a748ca4758a00b580283e06596
diff --git a/trunk/arch/x86_64/mm/fault.c b/trunk/arch/x86_64/mm/fault.c
@@ -62,21 +62,19 @@ void bust_spinlocks(int yes)
 static noinline int is_prefetch(struct pt_regs *regs, unsigned long addr,
 				unsigned long error_code)
 { 
-	unsigned char *instr = (unsigned char *)(regs->rip);
+	unsigned char *instr;
 	int scan_more = 1;
 	int prefetch = 0; 
-	unsigned char *max_instr = instr + 15;
+	unsigned char *max_instr;
 
 	/* If it was a exec fault ignore */
 	if (error_code & (1<<4))
 		return 0;
 
-	/* Code segments in LDT could have a non zero base. Don't check
-	   when that's possible */
-	if (regs->cs & (1<<2))
-		return 0;
+	instr = (unsigned char *)convert_rip_to_linear(current, regs);
+	max_instr = instr + 15;
 
-	if ((regs->cs & 3) != 0 && regs->rip >= TASK_SIZE)
+	if ((regs->cs & 3) != 0 && instr >= (unsigned char *)TASK_SIZE)
 		return 0;
 
 	while (scan_more && instr < max_instr) { 

diff --git a/trunk/include/asm-x86_64/ptrace.h b/trunk/include/asm-x86_64/ptrace.h
@@ -86,6 +86,11 @@ struct pt_regs {
 extern unsigned long profile_pc(struct pt_regs *regs);
 void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
 
+struct task_struct;
+
+extern unsigned long
+convert_rip_to_linear(struct task_struct *child, struct pt_regs *regs);
+
 enum {
         EF_CF   = 0x00000001,
         EF_PF   = 0x00000004,