mps2: put the .gnu.sgstubs section in a hard coded address

  - if the address of the .gnu.sgtubs is not defined, it's not possible to provide a correct SAU permissions for non secure calleble code

Author: Yehor Hrek

arch/cortex-m33/mps2/src/mps2_an505_qemu/secure/partition_ARMCM33.h

@@ -125,12 +125,12 @@
 /*
 //     <o>Start Address <0-0xFFFFFFE0>
 */
-#define SAU_INIT_START2     0x10000000
+#define SAU_INIT_START2     0x10020000
 
 /*
 //     <o>End Address <0x1F-0xFFFFFFFF>
 */
-#define SAU_INIT_END2       0x1000FFFF
+#define SAU_INIT_END2       0x1002FFFF
 
 /*
 //     <o>Region is

arch/cortex-m33/mps2/src/mps2_an505_qemu/secure/secure.ld

@@ -4,7 +4,7 @@ MEMORY
 {
  /* Flash is actually 224M */
    S_FLASH     (rx)  : ORIGIN = 0x10000000, LENGTH = 512K
-   S_FLASH_END (rx)  : ORIGIN = 0x10020000, LENGTH = 32K
+   S_FLASH_END (rx)  : ORIGIN = 0x10030000, LENGTH = 32K
    S_RAM       (rwx) : ORIGIN = 0x38000000, LENGTH = 0x2000
 }
 
@@ -50,13 +50,14 @@ SECTIONS
    * '--section-start' or in a linker script, to indicate where to place these
    * veneers in memory.
    */
-  .gnu.sgstubs :
+  .gnu.sgstubs 0x10020000 : AT(0x10020000)
   {
     _ld_veneer_base = .;
     *(.gnu.sgstubs*)
     . = ALIGN(32);
     _ld_veneer_limit = .;
   } > S_FLASH
+ASSERT(SIZEOF(.gnu.sgstubs) <= 0x010000, "Error: .gnu.sgstubs section is too large!")
 
  	.heap (COPY):
 	{