From 2feac34e3fc27b22997d3a3794974192c345eb26 Mon Sep 17 00:00:00 2001
From: drath <drath@b42882b7-edfa-0310-969c-e2dbd0fdcd60>
Date: Fri, 22 Aug 2008 12:08:47 +0000
Subject: [PATCH] - fix a off-by-one error in the buffer read/write code that
 checks for a address wrap

git-svn-id: svn://svn.berlios.de/openocd/trunk@957 b42882b7-edfa-0310-969c-e2dbd0fdcd60
---
 src/target/target.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/target/target.c b/src/target/target.c
index 9f633ee1a..d91928d1d 100644
--- a/src/target/target.c
+++ b/src/target/target.c
@@ -870,7 +870,7 @@ int target_write_buffer(struct target_s *target, u32 address, u32 size, u8 *buff
 		return ERROR_FAIL;
 	}
 
-	if (address+size<address)
+	if ((address + size - 1) < address)
 	{
 		/* GDB can request this when e.g. PC is 0xfffffffc*/
 		LOG_ERROR("address+size wrapped(0x%08x, 0x%08x)", address, size);
@@ -946,7 +946,7 @@ int target_read_buffer(struct target_s *target, u32 address, u32 size, u8 *buffe
 		return ERROR_FAIL;
 	}
 
-	if (address+size<address)
+	if ((address + size - 1) < address)
 	{
 		/* GDB can request this when e.g. PC is 0xfffffffc*/
 		LOG_ERROR("address+size wrapped(0x%08x, 0x%08x)", address, size);