From: Doug Evans <dje@google.com>
Date: Mon, 28 Sep 2009 21:09:15 +0000 (+0000)
Subject: 	(TRAP_REMOVE_SYSCALL_FLAG): New macro.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=66d990c74963fb25d8448e4d081fa757b427a5bc;p=binutils-gdb.git

	(TRAP_REMOVE_SYSCALL_FLAG): New macro.
	(linux_nat_wait_1): Mask off is-syscall bit in wait status for
	TRAP_IS_SYSCALL before passing value to caller.
---

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 347582829d1..06271505dad 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,6 +1,9 @@
 2009-09-28  Doug Evans  <dje@google.com>
 
 	* linux-nat.c (status_to_str): Handle TRAP_IS_SYSCALL.
+	(TRAP_REMOVE_SYSCALL_FLAG): New macro.
+	(linux_nat_wait_1): Mask off is-syscall bit in wait status for
+	TRAP_IS_SYSCALL before passing value to caller.
 
 2009-09-28  Ulrich Weigand  <uweigand@de.ibm.com>
 
diff --git a/gdb/linux-nat.c b/gdb/linux-nat.c
index 48affdb1ffe..9b8cf480866 100644
--- a/gdb/linux-nat.c
+++ b/gdb/linux-nat.c
@@ -70,6 +70,7 @@
 /* To be used when one needs to know wether a
    WSTOPSIG (status) is a syscall */
 #define TRAP_IS_SYSCALL (SIGTRAP | 0x80)
+#define TRAP_REMOVE_SYSCALL_FLAG(status) ((status) & ~(0x80 << 8))
 
 /* This comment documents high-level logic of this file. 
 
@@ -3012,6 +3013,12 @@ retry:
 
 	  lp = linux_nat_filter_event (lwpid, status, options);
 
+	  /* If this was a syscall trap, we no longer need or want
+	     the 0x80 flag, remove it.  */
+	  if (WIFSTOPPED (status)
+	      && WSTOPSIG (status) == TRAP_IS_SYSCALL)
+	    status = TRAP_REMOVE_SYSCALL_FLAG (status);
+
 	  if (lp
 	      && ptid_is_pid (ptid)
 	      && ptid_get_pid (lp->ptid) != ptid_get_pid (ptid))