瀏覽代碼

[PATCH] i386: print EIP/ESP last

Print summary registers (EIP and SS:ESP only) as last death info.  This
makes this important data visible in case it had scrolled off the top of
the display.  Similar to what x86_64 does.  Suggested by Andi Kleen.

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Randy Dunlap 19 年之前
父節點
當前提交
7bee5c0fd2
共有 1 個文件被更改,包括 15 次插入1 次删除
  1. 15 1
      arch/i386/kernel/traps.c

+ 15 - 1
arch/i386/kernel/traps.c

@@ -365,6 +365,9 @@ void die(const char * str, struct pt_regs * regs, long err)
 
 	if (++die.lock_owner_depth < 3) {
 		int nl = 0;
+		unsigned long esp;
+		unsigned short ss;
+
 		handle_BUG(regs);
 		printk(KERN_EMERG "%s: %04lx [#%d]\n", str, err & 0xffff, ++die_counter);
 #ifdef CONFIG_PREEMPT
@@ -387,8 +390,19 @@ void die(const char * str, struct pt_regs * regs, long err)
 			printk("\n");
 		if (notify_die(DIE_OOPS, str, regs, err,
 					current->thread.trap_no, SIGSEGV) !=
-				NOTIFY_STOP)
+				NOTIFY_STOP) {
 			show_registers(regs);
+			/* Executive summary in case the oops scrolled away */
+			esp = (unsigned long) (&regs->esp);
+			savesegment(ss, ss);
+			if (user_mode(regs)) {
+				esp = regs->esp;
+				ss = regs->xss & 0xffff;
+			}
+			printk(KERN_EMERG "EIP: [<%08lx>] ", regs->eip);
+			print_symbol("%s", regs->eip);
+			printk(" SS:ESP %04x:%08lx\n", ss, esp);
+		}
 		else
 			regs = NULL;
   	} else