diff --git a/demos/nil/NIL-STM32F303-DISCOVERY/Makefile b/demos/nil/NIL-STM32F303-DISCOVERY/Makefile
index 4ff59d9af..041b276bf 100644
--- a/demos/nil/NIL-STM32F303-DISCOVERY/Makefile
+++ b/demos/nil/NIL-STM32F303-DISCOVERY/Makefile
@@ -41,8 +41,19 @@ endif
 # Architecture or project specific options
 #
 
+# Stack size to be allocated to the Cortex-M process stack. This stack is
+# the stack used by the main() thread.
+ifeq ($(USE_PROCESS_STACKSIZE),)
+  USE_PROCESS_STACKSIZE = 0x100
+endif
+
+# Stack size to the allocated to the Cortex-M main/exceptions stack. This
+# stack is used for processing interrupts and exceptions.
+ifeq ($(USE_EXCEPTIONS_STACKSIZE),)
+  USE_EXCEPTIONS_STACKSIZE = 0x400
+endif
+
 # Enables the use of FPU on Cortex-M4.
-# Enable this if you really want to use the STM FWLib.
 ifeq ($(USE_FPU),)
   USE_FPU = no
 endif
@@ -74,7 +85,7 @@ include $(CHIBIOS)/os/nil/ports/ARMCMx/compilers/GCC/mk/port_stm32f30x.mk
 #include $(CHIBIOS)/test/test.mk
 
 # Define linker script file here
-LDSCRIPT= $(PORTLD)/STM32F303xC.ld
+LDSCRIPT = $(PORTLD)/STM32F303xC.ld
 
 # C sources that can be compiled in ARM or THUMB mode depending on the global
 # setting.
@@ -160,29 +171,6 @@ CPPWARN = -Wall -Wextra
 # Compiler settings
 ##############################################################################
 
-##############################################################################
-# Start of default section
-#
-
-# List all default C defines here, like -D_DEBUG=1
-DDEFS =
-
-# List all default ASM defines here, like -D_DEBUG=1
-DADEFS =
-
-# List all default directories to look for include files here
-DINCDIR =
-
-# List the default directory to look for the libraries here
-DLIBDIR =
-
-# List all default libraries here
-DLIBS =
-
-#
-# End of default section
-##############################################################################
-
 ##############################################################################
 # Start of user section
 #
@@ -206,15 +194,6 @@ ULIBS =
 # End of user defines
 ##############################################################################
 
-ifeq ($(USE_FPU),yes)
-  USE_OPT += -mfloat-abi=softfp -mfpu=fpv4-sp-d16 -fsingle-precision-constant
-  DDEFS += -DCORTEX_USE_FPU=TRUE
-  DADEFS += -DCORTEX_USE_FPU=TRUE
-else
-  DDEFS += -DCORTEX_USE_FPU=FALSE
-  DADEFS += -DCORTEX_USE_FPU=FALSE
-endif
-
 ifeq ($(USE_FWLIB),yes)
   include $(CHIBIOS)/ext/stm32lib/stm32lib.mk
   CSRC += $(STM32SRC)
@@ -222,4 +201,5 @@ ifeq ($(USE_FWLIB),yes)
   USE_OPT += -DUSE_STDPERIPH_DRIVER
 endif
 
-include $(CHIBIOS)/os/common/ports/ARMCMx/compilers/GCC/rules.mk
+RULESPATH = $(CHIBIOS)/os/common/ports/ARMCMx/compilers/GCC
+include $(RULESPATH)/rules.mk
diff --git a/os/common/ports/ARMCMx/compilers/GCC/ld/STM32F051x8.ld b/os/common/ports/ARMCMx/compilers/GCC/ld/STM32F051x8.ld
index 838fb6207..7f0bf713b 100644
--- a/os/common/ports/ARMCMx/compilers/GCC/ld/STM32F051x8.ld
+++ b/os/common/ports/ARMCMx/compilers/GCC/ld/STM32F051x8.ld
@@ -21,133 +21,10 @@
 /*
  * ST32F051x8 memory setup.
  */
-__main_stack_size__     = 0x0400;
-__process_stack_size__  = 0x0200;
-
 MEMORY
 {
     flash : org = 0x08000000, len = 64k
     ram : org = 0x20000000, len = 8k
 }
 
-__ram_start__           = ORIGIN(ram);
-__ram_size__            = LENGTH(ram);
-__ram_end__             = __ram_start__ + __ram_size__;
-
-ENTRY(Reset_Handler)
-
-SECTIONS
-{
-    . = 0;
-    _text = .;
-
-    startup : ALIGN(16) SUBALIGN(16)
-    {
-        KEEP(*(vectors))
-    } > flash
-
-    constructors : ALIGN(4) SUBALIGN(4)
-    {
-        PROVIDE(__init_array_start = .);
-        KEEP(*(SORT(.init_array.*)))
-        KEEP(*(.init_array))
-        PROVIDE(__init_array_end = .);
-    } > flash
-
-    destructors : ALIGN(4) SUBALIGN(4)
-    {
-        PROVIDE(__fini_array_start = .);
-        KEEP(*(.fini_array))
-        KEEP(*(SORT(.fini_array.*)))
-        PROVIDE(__fini_array_end = .);
-    } > flash
-
-    .text : ALIGN(16) SUBALIGN(16)
-    {
-        *(.text.startup.*)
-        *(.text)
-        *(.text.*)
-        *(.rodata)
-        *(.rodata.*)
-        *(.glue_7t)
-        *(.glue_7)
-        *(.gcc*)
-    } > flash
-
-    .ARM.extab :
-    {
-        *(.ARM.extab* .gnu.linkonce.armextab.*)
-    } > flash
-
-    .ARM.exidx : {
-        PROVIDE(__exidx_start = .);
-        *(.ARM.exidx* .gnu.linkonce.armexidx.*)
-        PROVIDE(__exidx_end = .);
-     } > flash
-
-    .eh_frame_hdr :
-    {
-        *(.eh_frame_hdr)
-    } > flash
-
-    .eh_frame : ONLY_IF_RO
-    {
-        *(.eh_frame)
-    } > flash
-    
-    .textalign : ONLY_IF_RO
-    {
-        . = ALIGN(8);
-    } > flash
-
-    . = ALIGN(4);
-    _etext = .;
-    _textdata = _etext;
-
-    .stacks :
-    {
-        . = ALIGN(8);
-        __main_stack_base__ = .;
-        . += __main_stack_size__;
-        . = ALIGN(8);
-        __main_stack_end__ = .;
-        __process_stack_base__ = .;
-        __main_thread_stack_base__ = .;
-        . += __process_stack_size__;
-        . = ALIGN(8);
-        __process_stack_end__ = .;
-        __main_thread_stack_end__ = .;
-    } > ram
-
-    .data :
-    {
-        . = ALIGN(4);
-        PROVIDE(_data = .);
-        *(.data)
-        . = ALIGN(4);
-        *(.data.*)
-        . = ALIGN(4);
-        *(.ramtext)
-        . = ALIGN(4);
-        PROVIDE(_edata = .);
-    } > ram AT > flash
-
-    .bss :
-    {
-        . = ALIGN(4);
-        PROVIDE(_bss_start = .);
-        *(.bss)
-        . = ALIGN(4);
-        *(.bss.*)
-        . = ALIGN(4);
-        *(COMMON)
-        . = ALIGN(4);
-        PROVIDE(_bss_end = .);
-    } > ram    
-}
-
-PROVIDE(end = .);
-_end            = .;
-
-__heap_base__   = _end;
-__heap_end__    = __ram_end__;
+INCLUDE rules.ld
diff --git a/os/common/ports/ARMCMx/compilers/GCC/ld/STM32F303xC.ld b/os/common/ports/ARMCMx/compilers/GCC/ld/STM32F303xC.ld
index 8f03734f4..28a6bbe00 100644
--- a/os/common/ports/ARMCMx/compilers/GCC/ld/STM32F303xC.ld
+++ b/os/common/ports/ARMCMx/compilers/GCC/ld/STM32F303xC.ld
@@ -21,9 +21,6 @@
 /*
  * ST32F303xC memory setup.
  */
-__main_stack_size__     = 0x0400;
-__process_stack_size__  = 0x0200;
-
 MEMORY
 {
     flash : org = 0x08000000, len = 256k
@@ -31,124 +28,4 @@ MEMORY
     ccmram : org = 0x10000000, len = 8k
 }
 
-__ram_start__           = ORIGIN(ram);
-__ram_size__            = LENGTH(ram);
-__ram_end__             = __ram_start__ + __ram_size__;
-
-ENTRY(Reset_Handler)
-
-SECTIONS
-{
-    . = 0;
-    _text = .;
-
-    startup : ALIGN(16) SUBALIGN(16)
-    {
-        KEEP(*(vectors))
-    } > flash
-
-    constructors : ALIGN(4) SUBALIGN(4)
-    {
-        PROVIDE(__init_array_start = .);
-        KEEP(*(SORT(.init_array.*)))
-        KEEP(*(.init_array))
-        PROVIDE(__init_array_end = .);
-    } > flash
-
-    destructors : ALIGN(4) SUBALIGN(4)
-    {
-        PROVIDE(__fini_array_start = .);
-        KEEP(*(.fini_array))
-        KEEP(*(SORT(.fini_array.*)))
-        PROVIDE(__fini_array_end = .);
-    } > flash
-
-    .text : ALIGN(16) SUBALIGN(16)
-    {
-        *(.text.startup.*)
-        *(.text)
-        *(.text.*)
-        *(.rodata)
-        *(.rodata.*)
-        *(.glue_7t)
-        *(.glue_7)
-        *(.gcc*)
-    } > flash
-
-    .ARM.extab :
-    {
-        *(.ARM.extab* .gnu.linkonce.armextab.*)
-    } > flash
-
-    .ARM.exidx : {
-        PROVIDE(__exidx_start = .);
-        *(.ARM.exidx* .gnu.linkonce.armexidx.*)
-        PROVIDE(__exidx_end = .);
-     } > flash
-
-    .eh_frame_hdr :
-    {
-        *(.eh_frame_hdr)
-    } > flash
-
-    .eh_frame : ONLY_IF_RO
-    {
-        *(.eh_frame)
-    } > flash
-    
-    .textalign : ONLY_IF_RO
-    {
-        . = ALIGN(8);
-    } > flash
-
-    . = ALIGN(4);
-    _etext = .;
-    _textdata = _etext;
-
-    .stacks :
-    {
-        . = ALIGN(8);
-        __main_stack_base__ = .;
-        . += __main_stack_size__;
-        . = ALIGN(8);
-        __main_stack_end__ = .;
-        __process_stack_base__ = .;
-        __main_thread_stack_base__ = .;
-        . += __process_stack_size__;
-        . = ALIGN(8);
-        __process_stack_end__ = .;
-        __main_thread_stack_end__ = .;
-    } > ram
-
-    .data :
-    {
-        . = ALIGN(4);
-        PROVIDE(_data = .);
-        *(.data)
-        . = ALIGN(4);
-        *(.data.*)
-        . = ALIGN(4);
-        *(.ramtext)
-        . = ALIGN(4);
-        PROVIDE(_edata = .);
-    } > ram AT > flash
-
-    .bss :
-    {
-        . = ALIGN(4);
-        PROVIDE(_bss_start = .);
-        *(.bss)
-        . = ALIGN(4);
-        *(.bss.*)
-        . = ALIGN(4);
-        *(COMMON)
-        . = ALIGN(4);
-        PROVIDE(_bss_end = .);
-    } > ram    
-}
-
-PROVIDE(end = .);
-_end            = .;
-
-__heap_base__   = _end;
-__heap_end__    = __ram_end__;
+INCLUDE rules.ld
diff --git a/os/common/ports/ARMCMx/compilers/GCC/ld/STM32F373xC.ld b/os/common/ports/ARMCMx/compilers/GCC/ld/STM32F373xC.ld
index 0fb2af344..042d9519f 100644
--- a/os/common/ports/ARMCMx/compilers/GCC/ld/STM32F373xC.ld
+++ b/os/common/ports/ARMCMx/compilers/GCC/ld/STM32F373xC.ld
@@ -21,133 +21,10 @@
 /*
  * ST32F373xC memory setup.
  */
-__main_stack_size__     = 0x0400;
-__process_stack_size__  = 0x0200;
-
 MEMORY
 {
     flash : org = 0x08000000, len = 256k
     ram : org = 0x20000000, len = 32k
 }
 
-__ram_start__           = ORIGIN(ram);
-__ram_size__            = LENGTH(ram);
-__ram_end__             = __ram_start__ + __ram_size__;
-
-ENTRY(Reset_Handler)
-
-SECTIONS
-{
-    . = 0;
-    _text = .;
-
-    startup : ALIGN(16) SUBALIGN(16)
-    {
-        KEEP(*(vectors))
-    } > flash
-
-    constructors : ALIGN(4) SUBALIGN(4)
-    {
-        PROVIDE(__init_array_start = .);
-        KEEP(*(SORT(.init_array.*)))
-        KEEP(*(.init_array))
-        PROVIDE(__init_array_end = .);
-    } > flash
-
-    destructors : ALIGN(4) SUBALIGN(4)
-    {
-        PROVIDE(__fini_array_start = .);
-        KEEP(*(.fini_array))
-        KEEP(*(SORT(.fini_array.*)))
-        PROVIDE(__fini_array_end = .);
-    } > flash
-
-    .text : ALIGN(16) SUBALIGN(16)
-    {
-        *(.text.startup.*)
-        *(.text)
-        *(.text.*)
-        *(.rodata)
-        *(.rodata.*)
-        *(.glue_7t)
-        *(.glue_7)
-        *(.gcc*)
-    } > flash
-
-    .ARM.extab :
-    {
-        *(.ARM.extab* .gnu.linkonce.armextab.*)
-    } > flash
-
-    .ARM.exidx : {
-        PROVIDE(__exidx_start = .);
-        *(.ARM.exidx* .gnu.linkonce.armexidx.*)
-        PROVIDE(__exidx_end = .);
-     } > flash
-
-    .eh_frame_hdr :
-    {
-        *(.eh_frame_hdr)
-    } > flash
-
-    .eh_frame : ONLY_IF_RO
-    {
-        *(.eh_frame)
-    } > flash
-    
-    .textalign : ONLY_IF_RO
-    {
-        . = ALIGN(8);
-    } > flash
-
-    . = ALIGN(4);
-    _etext = .;
-    _textdata = _etext;
-
-    .stacks :
-    {
-        . = ALIGN(8);
-        __main_stack_base__ = .;
-        . += __main_stack_size__;
-        . = ALIGN(8);
-        __main_stack_end__ = .;
-        __process_stack_base__ = .;
-        __main_thread_stack_base__ = .;
-        . += __process_stack_size__;
-        . = ALIGN(8);
-        __process_stack_end__ = .;
-        __main_thread_stack_end__ = .;
-    } > ram
-
-    .data :
-    {
-        . = ALIGN(4);
-        PROVIDE(_data = .);
-        *(.data)
-        . = ALIGN(4);
-        *(.data.*)
-        . = ALIGN(4);
-        *(.ramtext)
-        . = ALIGN(4);
-        PROVIDE(_edata = .);
-    } > ram AT > flash
-
-    .bss :
-    {
-        . = ALIGN(4);
-        PROVIDE(_bss_start = .);
-        *(.bss)
-        . = ALIGN(4);
-        *(.bss.*)
-        . = ALIGN(4);
-        *(COMMON)
-        . = ALIGN(4);
-        PROVIDE(_bss_end = .);
-    } > ram    
-}
-
-PROVIDE(end = .);
-_end            = .;
-
-__heap_base__   = _end;
-__heap_end__    = __ram_end__;
+INCLUDE rules.ld
diff --git a/os/common/ports/ARMCMx/compilers/GCC/ld/STM32F405xG.ld b/os/common/ports/ARMCMx/compilers/GCC/ld/STM32F405xG.ld
index 8f95d5c42..52ec669d6 100644
--- a/os/common/ports/ARMCMx/compilers/GCC/ld/STM32F405xG.ld
+++ b/os/common/ports/ARMCMx/compilers/GCC/ld/STM32F405xG.ld
@@ -21,9 +21,6 @@
 /*
  * ST32F405xG memory setup.
  */
-__main_stack_size__     = 0x0400;
-__process_stack_size__  = 0x0200;
-
 MEMORY
 {
     flash : org = 0x08000000, len = 1M
@@ -32,124 +29,4 @@ MEMORY
     ccmram : org = 0x10000000, len = 64k
 }
 
-__ram_start__           = ORIGIN(ram);
-__ram_size__            = LENGTH(ram);
-__ram_end__             = __ram_start__ + __ram_size__;
-
-ENTRY(ResetHandler)
-
-SECTIONS
-{
-    . = 0;
-    _text = .;
-
-    startup : ALIGN(16) SUBALIGN(16)
-    {
-        KEEP(*(vectors))
-    } > flash
-
-    constructors : ALIGN(4) SUBALIGN(4)
-    {
-        PROVIDE(__init_array_start = .);
-        KEEP(*(SORT(.init_array.*)))
-        KEEP(*(.init_array))
-        PROVIDE(__init_array_end = .);
-    } > flash
-
-    destructors : ALIGN(4) SUBALIGN(4)
-    {
-        PROVIDE(__fini_array_start = .);
-        KEEP(*(.fini_array))
-        KEEP(*(SORT(.fini_array.*)))
-        PROVIDE(__fini_array_end = .);
-    } > flash
-
-    .text : ALIGN(16) SUBALIGN(16)
-    {
-        *(.text.startup.*)
-        *(.text)
-        *(.text.*)
-        *(.rodata)
-        *(.rodata.*)
-        *(.glue_7t)
-        *(.glue_7)
-        *(.gcc*)
-    } > flash
-
-    .ARM.extab :
-    {
-        *(.ARM.extab* .gnu.linkonce.armextab.*)
-    } > flash
-
-    .ARM.exidx : {
-        PROVIDE(__exidx_start = .);
-        *(.ARM.exidx* .gnu.linkonce.armexidx.*)
-        PROVIDE(__exidx_end = .);
-     } > flash
-
-    .eh_frame_hdr :
-    {
-        *(.eh_frame_hdr)
-    } > flash
-
-    .eh_frame : ONLY_IF_RO
-    {
-        *(.eh_frame)
-    } > flash
-    
-    .textalign : ONLY_IF_RO
-    {
-        . = ALIGN(8);
-    } > flash
-
-    . = ALIGN(4);
-    _etext = .;
-    _textdata = _etext;
-
-    .stacks :
-    {
-        . = ALIGN(8);
-        __main_stack_base__ = .;
-        . += __main_stack_size__;
-        . = ALIGN(8);
-        __main_stack_end__ = .;
-        __process_stack_base__ = .;
-        __main_thread_stack_base__ = .;
-        . += __process_stack_size__;
-        . = ALIGN(8);
-        __process_stack_end__ = .;
-        __main_thread_stack_end__ = .;
-    } > ram
-
-    .data :
-    {
-        . = ALIGN(4);
-        PROVIDE(_data = .);
-        *(.data)
-        . = ALIGN(4);
-        *(.data.*)
-        . = ALIGN(4);
-        *(.ramtext)
-        . = ALIGN(4);
-        PROVIDE(_edata = .);
-    } > ram AT > flash
-
-    .bss :
-    {
-        . = ALIGN(4);
-        PROVIDE(_bss_start = .);
-        *(.bss)
-        . = ALIGN(4);
-        *(.bss.*)
-        . = ALIGN(4);
-        *(COMMON)
-        . = ALIGN(4);
-        PROVIDE(_bss_end = .);
-    } > ram    
-}
-
-PROVIDE(end = .);
-_end            = .;
-
-__heap_base__   = _end;
-__heap_end__    = __ram_end__;
+INCLUDE rules.ld
diff --git a/os/common/ports/ARMCMx/compilers/GCC/ld/STM32F407xG.ld b/os/common/ports/ARMCMx/compilers/GCC/ld/STM32F407xG.ld
index 9d34f2ca9..3c1648384 100644
--- a/os/common/ports/ARMCMx/compilers/GCC/ld/STM32F407xG.ld
+++ b/os/common/ports/ARMCMx/compilers/GCC/ld/STM32F407xG.ld
@@ -21,9 +21,6 @@
 /*
  * ST32F407xG memory setup.
  */
-__main_stack_size__     = 0x0400;
-__process_stack_size__  = 0x0200;
-
 MEMORY
 {
     flash : org = 0x08000000, len = 1M
@@ -32,124 +29,4 @@ MEMORY
     ccmram : org = 0x10000000, len = 64k
 }
 
-__ram_start__           = ORIGIN(ram);
-__ram_size__            = LENGTH(ram);
-__ram_end__             = __ram_start__ + __ram_size__;
-
-ENTRY(Reset_Handler)
-
-SECTIONS
-{
-    . = 0;
-    _text = .;
-
-    startup : ALIGN(16) SUBALIGN(16)
-    {
-        KEEP(*(vectors))
-    } > flash
-
-    constructors : ALIGN(4) SUBALIGN(4)
-    {
-        PROVIDE(__init_array_start = .);
-        KEEP(*(SORT(.init_array.*)))
-        KEEP(*(.init_array))
-        PROVIDE(__init_array_end = .);
-    } > flash
-
-    destructors : ALIGN(4) SUBALIGN(4)
-    {
-        PROVIDE(__fini_array_start = .);
-        KEEP(*(.fini_array))
-        KEEP(*(SORT(.fini_array.*)))
-        PROVIDE(__fini_array_end = .);
-    } > flash
-
-    .text : ALIGN(16) SUBALIGN(16)
-    {
-        *(.text.startup.*)
-        *(.text)
-        *(.text.*)
-        *(.rodata)
-        *(.rodata.*)
-        *(.glue_7t)
-        *(.glue_7)
-        *(.gcc*)
-    } > flash
-
-    .ARM.extab :
-    {
-        *(.ARM.extab* .gnu.linkonce.armextab.*)
-    } > flash
-
-    .ARM.exidx : {
-        PROVIDE(__exidx_start = .);
-        *(.ARM.exidx* .gnu.linkonce.armexidx.*)
-        PROVIDE(__exidx_end = .);
-     } > flash
-
-    .eh_frame_hdr :
-    {
-        *(.eh_frame_hdr)
-    } > flash
-
-    .eh_frame : ONLY_IF_RO
-    {
-        *(.eh_frame)
-    } > flash
-    
-    .textalign : ONLY_IF_RO
-    {
-        . = ALIGN(8);
-    } > flash
-
-    . = ALIGN(4);
-    _etext = .;
-    _textdata = _etext;
-
-    .stacks :
-    {
-        . = ALIGN(8);
-        __main_stack_base__ = .;
-        . += __main_stack_size__;
-        . = ALIGN(8);
-        __main_stack_end__ = .;
-        __process_stack_base__ = .;
-        __main_thread_stack_base__ = .;
-        . += __process_stack_size__;
-        . = ALIGN(8);
-        __process_stack_end__ = .;
-        __main_thread_stack_end__ = .;
-    } > ram
-
-    .data :
-    {
-        . = ALIGN(4);
-        PROVIDE(_data = .);
-        *(.data)
-        . = ALIGN(4);
-        *(.data.*)
-        . = ALIGN(4);
-        *(.ramtext)
-        . = ALIGN(4);
-        PROVIDE(_edata = .);
-    } > ram AT > flash
-
-    .bss :
-    {
-        . = ALIGN(4);
-        PROVIDE(_bss_start = .);
-        *(.bss)
-        . = ALIGN(4);
-        *(.bss.*)
-        . = ALIGN(4);
-        *(COMMON)
-        . = ALIGN(4);
-        PROVIDE(_bss_end = .);
-    } > ram    
-}
-
-PROVIDE(end = .);
-_end            = .;
-
-__heap_base__   = _end;
-__heap_end__    = __ram_end__;
+INCLUDE rules.ld
diff --git a/os/common/ports/ARMCMx/compilers/GCC/ld/STM32L152xB.ld b/os/common/ports/ARMCMx/compilers/GCC/ld/STM32L152xB.ld
index 966c2cef3..5a364f30b 100644
--- a/os/common/ports/ARMCMx/compilers/GCC/ld/STM32L152xB.ld
+++ b/os/common/ports/ARMCMx/compilers/GCC/ld/STM32L152xB.ld
@@ -21,133 +21,10 @@
 /*
  * ST32L152xB memory setup.
  */
-__main_stack_size__     = 0x0400;
-__process_stack_size__  = 0x0200;
-
 MEMORY
 {
     flash : org = 0x08000000, len = 128k
     ram : org = 0x20000000, len = 16k
 }
 
-__ram_start__           = ORIGIN(ram);
-__ram_size__            = LENGTH(ram);
-__ram_end__             = __ram_start__ + __ram_size__;
-
-ENTRY(ResetHandler)
-
-SECTIONS
-{
-    . = 0;
-    _text = .;
-
-    startup : ALIGN(16) SUBALIGN(16)
-    {
-        KEEP(*(vectors))
-    } > flash
-
-    constructors : ALIGN(4) SUBALIGN(4)
-    {
-        PROVIDE(__init_array_start = .);
-        KEEP(*(SORT(.init_array.*)))
-        KEEP(*(.init_array))
-        PROVIDE(__init_array_end = .);
-    } > flash
-
-    destructors : ALIGN(4) SUBALIGN(4)
-    {
-        PROVIDE(__fini_array_start = .);
-        KEEP(*(.fini_array))
-        KEEP(*(SORT(.fini_array.*)))
-        PROVIDE(__fini_array_end = .);
-    } > flash
-
-    .text : ALIGN(16) SUBALIGN(16)
-    {
-        *(.text.startup.*)
-        *(.text)
-        *(.text.*)
-        *(.rodata)
-        *(.rodata.*)
-        *(.glue_7t)
-        *(.glue_7)
-        *(.gcc*)
-    } > flash
-
-    .ARM.extab :
-    {
-        *(.ARM.extab* .gnu.linkonce.armextab.*)
-    } > flash
-
-    .ARM.exidx : {
-        PROVIDE(__exidx_start = .);
-        *(.ARM.exidx* .gnu.linkonce.armexidx.*)
-        PROVIDE(__exidx_end = .);
-     } > flash
-
-    .eh_frame_hdr :
-    {
-        *(.eh_frame_hdr)
-    } > flash
-
-    .eh_frame : ONLY_IF_RO
-    {
-        *(.eh_frame)
-    } > flash
-    
-    .textalign : ONLY_IF_RO
-    {
-        . = ALIGN(8);
-    } > flash
-
-    . = ALIGN(4);
-    _etext = .;
-    _textdata = _etext;
-
-    .stacks :
-    {
-        . = ALIGN(8);
-        __main_stack_base__ = .;
-        . += __main_stack_size__;
-        . = ALIGN(8);
-        __main_stack_end__ = .;
-        __process_stack_base__ = .;
-        __main_thread_stack_base__ = .;
-        . += __process_stack_size__;
-        . = ALIGN(8);
-        __process_stack_end__ = .;
-        __main_thread_stack_end__ = .;
-    } > ram
-
-    .data :
-    {
-        . = ALIGN(4);
-        PROVIDE(_data = .);
-        *(.data)
-        . = ALIGN(4);
-        *(.data.*)
-        . = ALIGN(4);
-        *(.ramtext)
-        . = ALIGN(4);
-        PROVIDE(_edata = .);
-    } > ram AT > flash
-
-    .bss :
-    {
-        . = ALIGN(4);
-        PROVIDE(_bss_start = .);
-        *(.bss)
-        . = ALIGN(4);
-        *(.bss.*)
-        . = ALIGN(4);
-        *(COMMON)
-        . = ALIGN(4);
-        PROVIDE(_bss_end = .);
-    } > ram    
-}
-
-PROVIDE(end = .);
-_end            = .;
-
-__heap_base__   = _end;
-__heap_end__    = __ram_end__;
+INCLUDE rules.ld
diff --git a/os/common/ports/ARMCMx/compilers/GCC/ld/STM32F407xG_CCM.ld b/os/common/ports/ARMCMx/compilers/GCC/rules.ld
similarity index 77%
rename from os/common/ports/ARMCMx/compilers/GCC/ld/STM32F407xG_CCM.ld
rename to os/common/ports/ARMCMx/compilers/GCC/rules.ld
index c23f1412f..7da83fefa 100644
--- a/os/common/ports/ARMCMx/compilers/GCC/ld/STM32F407xG_CCM.ld
+++ b/os/common/ports/ARMCMx/compilers/GCC/rules.ld
@@ -18,20 +18,6 @@
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-/*
- * ST32F407xG memory setup.
- */
-__main_stack_size__     = 0x0400;
-__process_stack_size__  = 0x0200;
-
-MEMORY
-{
-    flash : org = 0x08000000, len = 1M
-    ram : org = 0x20000000, len = 112k
-    ethram : org = 0x2001C000, len = 16k
-    ccmram : org = 0x10000000, len = 64k
-}
-
 __ram_start__           = ORIGIN(ram);
 __ram_size__            = LENGTH(ram);
 __ram_end__             = __ram_start__ + __ram_size__;
@@ -119,28 +105,7 @@ SECTIONS
         . = ALIGN(8);
         __process_stack_end__ = .;
         __main_thread_stack_end__ = .;
-    } > ccmram
-
-    .ccm :
-    {
-        PROVIDE(_cmm_start = .);
-        . = ALIGN(4);
-        *(.bss.mainthread.*)
-        . = ALIGN(4);
-        *(.bss._idle_thread_wa)
-        . = ALIGN(4);
-        *(.bss.rlist)
-        . = ALIGN(4);
-        *(.bss.vtlist)
-        . = ALIGN(4);
-        *(.bss.endmem)
-        . = ALIGN(4);
-        *(.bss.nextmem)
-        . = ALIGN(4);
-        *(.bss.default_heap)
-        . = ALIGN(4);
-        PROVIDE(_cmm_end = .);
-    } > ccmram
+    } > ram
 
     .data :
     {
diff --git a/os/common/ports/ARMCMx/compilers/GCC/rules.mk b/os/common/ports/ARMCMx/compilers/GCC/rules.mk
index 33531d201..7b1cfb68a 100644
--- a/os/common/ports/ARMCMx/compilers/GCC/rules.mk
+++ b/os/common/ports/ARMCMx/compilers/GCC/rules.mk
@@ -1,5 +1,40 @@
 # ARM Cortex-Mx common makefile scripts and rules.
 
+##############################################################################
+# Processing options coming from the upper Makefile.
+#
+
+# FPU-related options
+ifeq ($(USE_FPU),yes)
+  USE_OPT += -mfloat-abi=softfp -mfpu=fpv4-sp-d16 -fsingle-precision-constant
+  DDEFS += -DCORTEX_USE_FPU=TRUE
+  DADEFS += -DCORTEX_USE_FPU=TRUE
+else
+  DDEFS += -DCORTEX_USE_FPU=FALSE
+  DADEFS += -DCORTEX_USE_FPU=FALSE
+endif
+
+# Garbage collection
+ifeq ($(USE_LINK_GC),yes)
+  LDOPT := --gc-sections
+else
+  LDOPT :=
+endif
+
+# Process stack size
+ifeq ($(USE_PROCESS_STACKSIZE),)
+  LDOPT := $(LDOPT),--defsym=__process_stack_size__=0x400
+else
+  LDOPT := $(LDOPT),--defsym=__process_stack_size__=$(USE_PROCESS_STACKSIZE)
+endif
+
+# Exceptions stack size
+ifeq ($(USE_EXCEPTIONS_STACKSIZE),)
+  LDOPT := $(LDOPT),--defsym=__main_stack_size__=0x400
+else
+  LDOPT := $(LDOPT),--defsym=__main_stack_size__=$(USE_EXCEPTIONS_STACKSIZE)
+endif
+
 # Output directory and files
 ifeq ($(BUILDDIR),)
   BUILDDIR = build
@@ -61,11 +96,7 @@ ASFLAGS   = $(MCFLAGS) -Wa,-amhls=$(LSTDIR)/$(notdir $(<:.s=.lst)) $(ADEFS)
 ASXFLAGS  = $(MCFLAGS) -Wa,-amhls=$(LSTDIR)/$(notdir $(<:.S=.lst)) $(ADEFS)
 CFLAGS    = $(MCFLAGS) $(OPT) $(COPT) $(CWARN) -Wa,-alms=$(LSTDIR)/$(notdir $(<:.c=.lst)) $(DEFS)
 CPPFLAGS  = $(MCFLAGS) $(OPT) $(CPPOPT) $(CPPWARN) -Wa,-alms=$(LSTDIR)/$(notdir $(<:.cpp=.lst)) $(DEFS)
-ifeq ($(USE_LINK_GC),yes)
-  LDFLAGS = $(MCFLAGS) -nostartfiles -T$(LDSCRIPT) -Wl,-Map=$(BUILDDIR)/$(PROJECT).map,--cref,--no-warn-mismatch,--gc-sections $(LLIBDIR)
-else
-  LDFLAGS = $(MCFLAGS) -nostartfiles -T$(LDSCRIPT) -Wl,-Map=$(BUILDDIR)/$(PROJECT).map,--cref,--no-warn-mismatch $(LLIBDIR)
-endif
+LDFLAGS   = $(MCFLAGS) -nostartfiles $(LLIBDIR) -Wl,-Map=$(BUILDDIR)/$(PROJECT).map,--cref,--no-warn-mismatch,--library-path=$(RULESPATH),--script=$(LDSCRIPT),$(LDOPT)
 
 # Thumb interwork enabled only if needed because it kills performance.
 ifneq ($(TSRC),)