STM32F3xxx : GCC_ARM remove zero bss, in startup.

zero bss is done in libc init after call _start.

Author: jamike

targets/TARGET_STM/TARGET_STM32F3/TARGET_DISCO_F303VC/device/TOOLCHAIN_GCC_ARM/startup_stm32f303xc.S

@@ -50,10 +50,6 @@ 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,        0xF1E0F85F
 /**
@@ -87,18 +83,6 @@ 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
 /* Call static constructors */

targets/TARGET_STM/TARGET_STM32F3/TARGET_DISCO_F334C8/device/TOOLCHAIN_GCC_ARM/startup_stm32f334x8.S

@@ -50,10 +50,6 @@ 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,        0xF1E0F85F
 /**
@@ -87,17 +83,6 @@ 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_STM32F3/TARGET_NUCLEO_F302R8/device/TOOLCHAIN_GCC_ARM/startup_stm32f302x8.S

@@ -50,10 +50,6 @@ 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,        0xF1E0F85F
 /**
@@ -87,17 +83,6 @@ 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_STM32F3/TARGET_NUCLEO_F303K8/device/TOOLCHAIN_GCC_ARM/startup_stm32f303x8.S

@@ -50,10 +50,6 @@ 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,        0xF1E0F85F
 /**
@@ -87,17 +83,6 @@ 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_STM32F3/TARGET_NUCLEO_F303RE/device/TOOLCHAIN_GCC_ARM/startup_stm32f303xe.S

@@ -50,10 +50,6 @@ 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,        0xF1E0F85F
 /**
@@ -87,17 +83,6 @@ 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_STM32F3/TARGET_NUCLEO_F303ZE/device/TOOLCHAIN_GCC_ARM/startup_stm32f303xe.S

@@ -50,10 +50,6 @@ 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,        0xF1E0F85F
 /**
@@ -87,17 +83,6 @@ 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_STM32F3/TARGET_NUCLEO_F334R8/device/TOOLCHAIN_GCC_ARM/startup_stm32f334x8.S

@@ -50,10 +50,6 @@ 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,        0xF1E0F85F
 /**
@@ -87,17 +83,6 @@ 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