STM32L1xx : GCC_ARM remove zero bss, in startup.

zero bss is done in libc init after call to _start.

Author: jamike

targets/TARGET_STM/TARGET_STM32L1/TARGET_MOTE_L152RC/device/TOOLCHAIN_GCC_ARM/startup_stm32l152xc.S

@@ -59,10 +59,6 @@ defined in linker script */
 .word _sdata
 /* end address for the .data section. defined in linker script */
 .word _edata
-/* start address for the .bss section. defined in linker script */
-.word _sbss
-/* end address for the .bss section. defined in linker script */
-.word _ebss
 
 .equ  BootRAM, 0xF108F85F
 /**
@@ -95,17 +91,6 @@ LoopCopyDataInit:
   adds r2, r0, r1
   cmp r2, r3
   bcc CopyDataInit
-  ldr r2, =_sbss
-  b LoopFillZerobss
-/* Zero fill the bss segment. */
-FillZerobss:
-  movs r3, #0
-  str r3, [r2], #4
-
-LoopFillZerobss:
-  ldr r3, = _ebss
-  cmp r2, r3
-  bcc FillZerobss
 
 /* Call the clock system intitialization function.*/
     bl  SystemInit

targets/TARGET_STM/TARGET_STM32L1/TARGET_NUCLEO_L152RE/device/TOOLCHAIN_GCC_ARM/startup_stm32l152xe.S

@@ -59,10 +59,6 @@ defined in linker script */
 .word _sdata
 /* end address for the .data section. defined in linker script */
 .word _edata
-/* start address for the .bss section. defined in linker script */
-.word _sbss
-/* end address for the .bss section. defined in linker script */
-.word _ebss
 
 .equ  BootRAM, 0xF108F85F
 /**
@@ -97,17 +93,6 @@ LoopCopyDataInit:
   adds r2, r0, r1
   cmp r2, r3
   bcc CopyDataInit
-  ldr r2, =_sbss
-  b LoopFillZerobss
-/* Zero fill the bss segment. */
-FillZerobss:
-  movs r3, #0
-  str r3, [r2], #4
-
-LoopFillZerobss:
-  ldr r3, = _ebss
-  cmp r2, r3
-  bcc FillZerobss
 
 /* Call the clock system intitialization function.*/
     bl  SystemInit

targets/TARGET_STM/TARGET_STM32L1/TARGET_NZ32_SC151/device/TOOLCHAIN_GCC_ARM/startup_stm32l151xc.S

@@ -59,10 +59,6 @@ defined in linker script */
 .word _sdata
 /* end address for the .data section. defined in linker script */
 .word _edata
-/* start address for the .bss section. defined in linker script */
-.word _sbss
-/* end address for the .bss section. defined in linker script */
-.word _ebss
 
 .equ  BootRAM, 0xF108F85F
 /**
@@ -95,17 +91,6 @@ LoopCopyDataInit:
   adds r2, r0, r1
   cmp r2, r3
   bcc CopyDataInit
-  ldr r2, =_sbss
-  b LoopFillZerobss
-/* Zero fill the bss segment. */
-FillZerobss:
-  movs r3, #0
-  str r3, [r2], #4
-
-LoopFillZerobss:
-  ldr r3, = _ebss
-  cmp r2, r3
-  bcc FillZerobss
 
 /* Call the clock system intitialization function.*/
     bl  SystemInit

targets/TARGET_STM/TARGET_STM32L1/TARGET_XDOT_L151CC/device/TOOLCHAIN_GCC_ARM/startup_stm32l151xc.S

@@ -59,10 +59,6 @@ defined in linker script */
 .word _sdata
 /* end address for the .data section. defined in linker script */
 .word _edata
-/* start address for the .bss section. defined in linker script */
-.word _sbss
-/* end address for the .bss section. defined in linker script */
-.word _ebss
 
 .equ  BootRAM, 0xF108F85F
 /**
@@ -95,17 +91,6 @@ LoopCopyDataInit:
   adds r2, r0, r1
   cmp r2, r3
   bcc CopyDataInit
-  ldr r2, =_sbss
-  b LoopFillZerobss
-/* Zero fill the bss segment. */
-FillZerobss:
-  movs r3, #0
-  str r3, [r2], #4
-
-LoopFillZerobss:
-  ldr r3, = _ebss
-  cmp r2, r3
-  bcc FillZerobss
 
 /* Call the clock system intitialization function.*/
     bl  SystemInit