From: Martin Mares <mj@ucw.cz>
Date: Sun, 24 Aug 2008 21:59:24 +0000 (+0200)
Subject: Detect breakpoint instructions, which are reported as syscall #-1.
X-Git-Tag: python-dummy-working~137
X-Git-Url: http://mj.ucw.cz/gitweb/?a=commitdiff_plain;h=2df8a8134aabd09151bfb3bb04c2a201a60d10b0;p=moe.git

Detect breakpoint instructions, which are reported as syscall #-1.
---

diff --git a/box/box.c b/box/box.c
index 2aaec6a..a9a9ec5 100644
--- a/box/box.c
+++ b/box/box.c
@@ -901,6 +901,8 @@ boxkeeper(void)
 	      static int stop_count = -1;
 	      if (ptrace(PTRACE_GETREGS, box_pid, NULL, &u) < 0)
 		die("ptrace(PTRACE_GETREGS): %m");
+	      if (u.regs.orig_eax < 0)		/* Process issued a breakpoint instruction */
+		err("SG: Breakpoint");
 	      stop_count++;
 	      if (!stop_count)			/* Traceme request */
 		msg(">> Traceme request caught\n");