--- a/packages/net/lwip_tcpip/current/ChangeLog
+++ b/packages/net/lwip_tcpip/current/ChangeLog
@@ -1,3 +1,10 @@
+2011-01-30  Ilija Kocho  <ilijak@siva.com.mk>
+
+	* cdl/lwip_net.cdl: New CDL option CYGSEM_LWIP_MEM_SECTION.
+	* include/lwipopts.h: Enter MEM_SECTION entity.
+	* src/mem.c, src/memp.c: Add an ability to use GCC section
+	attribute for statically allocated buffers, pbufs, and heap.
+
 2011-01-02  Ilija Kocho  <ilijak@siva.com.mk>
 
 	* src/ecos/sequential.c, src/ecos/simple.c: Fixed miltiple-line

--- a/packages/net/lwip_tcpip/current/cdl/lwip_net.cdl
+++ b/packages/net/lwip_tcpip/current/cdl/lwip_net.cdl
@@ -1422,6 +1422,33 @@ cdl_package CYGPKG_NET_LWIP {
                 to accomodate single full size TCP frame in one pbuf, including
                 TCP_MSS, IP header, and link header."
         }       
+
+        cdl_component CYGOPT_LWIP_MEM_PLF_SPEC {
+            display         "Platform/application specific memory settings"
+            flavor          none
+            no_define
+            description     "
+                Platform or application specific settings such as special
+                memory section and memory constrains."
+
+            cdl_option CYGSEM_LWIP_MEM_SECTION {
+                display         "Place lwIP buffers and heap in special\
+                                        memory section."
+                flavor          bool
+                default_value   is_active(CYGDAT_LWIP_MEM_SECTION_NAME)
+                active_if       CYGDAT_LWIP_MEM_SECTION_NAME
+
+                description     "
+                    If you need lwIP buffers to appear in some special
+                    memory section (it is useful for devices with low
+                    memory footprint that is in addition fragmented
+                    in several non-contiguous blocks) the platform
+                    config file should provide the name of this section
+                    through CYGDAT_LWIP_MEM_SECTION_NAME option, if so,
+                    you can let to use the GCC section attribute for
+                    needed variables by this option."
+            }
+        }
     }
     
     cdl_component CYGPKG_LWIP_THREADS {

--- a/packages/net/lwip_tcpip/current/include/lwipopts.h
+++ b/packages/net/lwip_tcpip/current/include/lwipopts.h
@@ -51,6 +51,14 @@
 #define MEMP_MEM_MALLOC             defined(CYGIMP_LWIP_MEMP_MEM_MALLOC)
 #define MEM_ALIGNMENT               CYGNUM_LWIP_MEM_ALIGNMENT
 #define MEM_SIZE                    CYGNUM_LWIP_MEM_SIZE
+
+#if defined(CYGSEM_LWIP_MEM_SECTION) && CYGSEM_LWIP_MEM_SECTION
+# include <cyg/infra/cyg_type.h>
+# define MEM_SECTION CYGBLD_ATTRIB_SECTION(CYGDAT_LWIP_MEM_SECTION_NAME)
+#else
+# define MEM_SECTION
+#endif
+
 #define MEMP_OVERFLOW_CHECK         defined(CYGDBG_LWIP_MEMP_OVERFLOW_CHECK)
 #define MEMP_SANITY_CHECK           defined(CYGDBG_LWIP_MEMP_SANITY_CHECK)
 

--- a/packages/net/lwip_tcpip/current/src/core/mem.c
+++ b/packages/net/lwip_tcpip/current/src/core/mem.c
@@ -172,7 +172,7 @@ struct mem {
 #define MEM_SIZE_ALIGNED     LWIP_MEM_ALIGN_SIZE(MEM_SIZE)
 
 /** the heap. we need one struct mem at the end and some room for alignment */
-static u8_t ram_heap[MEM_SIZE_ALIGNED + (2*SIZEOF_STRUCT_MEM) + MEM_ALIGNMENT];
+static u8_t ram_heap[MEM_SIZE_ALIGNED + (2*SIZEOF_STRUCT_MEM) + MEM_ALIGNMENT] MEM_SECTION;
 /** pointer to the heap (ram_heap): for alignment, ram is now a pointer instead of an array */
 static u8_t *ram;
 /** the last entry, always unused! */

--- a/packages/net/lwip_tcpip/current/src/core/memp.c
+++ b/packages/net/lwip_tcpip/current/src/core/memp.c
@@ -146,7 +146,7 @@ static const char *memp_desc[MEMP_MAX] =
 static u8_t memp_memory[MEM_ALIGNMENT - 1 
 #define LWIP_MEMPOOL(name,num,size,desc) + ( (num) * (MEMP_SIZE + MEMP_ALIGN_SIZE(size) ) )
 #include "lwip/memp_std.h"
-];
+] MEM_SECTION;
 
 #if MEMP_SANITY_CHECK
 /**