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boot/startup: Add optional stack fill in startup #3398

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boot/startup: Add optional stack fill in startup #3398

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10 changes: 10 additions & 0 deletions boot/startup/src/arch/cortex_m0/cortex_m0_startup.s
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,8 @@
* under the License.
*/

#include "syscfg/syscfg.h"

.syntax unified
.arch armv6-m

Expand Down Expand Up @@ -64,6 +66,14 @@ Reset_Handler:

.L_zero_table_done:

#if MYNEWT_VAL_MAIN_STACK_FILL
ldr r2, =0xdeadbeef
ldr r0, =__StackLimit
0: stm r0!, {r2}
cmp r0, sp
blt 0b
#endif

ldr r0, =__HeapBase
ldr r1, =__HeapLimit
bl _sbrkInit
Expand Down
10 changes: 10 additions & 0 deletions boot/startup/src/arch/cortex_m3/cortex_m3_startup.s
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,8 @@
* under the License.
*/

#include "syscfg/syscfg.h"

.syntax unified
.arch armv7-m

Expand Down Expand Up @@ -67,6 +69,14 @@ Reset_Handler:
b .L_for_each_zero_region
.L_zero_table_done:

#if MYNEWT_VAL_MAIN_STACK_FILL
ldr r2, =0xdeadbeef
ldr r0, =__StackLimit
0: stm r0!, {r2}
cmp r0, sp
blt 0b
#endif

ldr r0, =__HeapBase
ldr r1, =__HeapLimit
bl _sbrkInit
Expand Down
10 changes: 10 additions & 0 deletions boot/startup/src/arch/cortex_m33/cortex_m33_startup.s
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,8 @@
* under the License.
*/

#include "syscfg/syscfg.h"

.syntax unified
.arch armv7-m

Expand Down Expand Up @@ -70,6 +72,14 @@ Reset_Handler:
b .L_for_each_zero_region
.L_zero_table_done:

#if MYNEWT_VAL_MAIN_STACK_FILL
ldr r2, =0xdeadbeef
ldr r0, =__StackLimit
0: stm r0!, {r2}
cmp r0, sp
blt 0b
#endif

ldr r0, =__HeapBase
ldr r1, =__HeapLimit
bl _sbrkInit
Expand Down
10 changes: 10 additions & 0 deletions boot/startup/src/arch/cortex_m4/cortex_m4_startup.s
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,8 @@
* under the License.
*/

#include "syscfg/syscfg.h"

.syntax unified
.arch armv7-m

Expand Down Expand Up @@ -67,6 +69,14 @@ Reset_Handler:
b .L_for_each_zero_region
.L_zero_table_done:

#if MYNEWT_VAL_MAIN_STACK_FILL
ldr r2, =0xdeadbeef
ldr r0, =__StackLimit
0: stm r0!, {r2}
cmp r0, sp
blt 0b
#endif

ldr r0, =__HeapBase
ldr r1, =__HeapLimit
bl _sbrkInit
Expand Down
10 changes: 10 additions & 0 deletions boot/startup/src/arch/cortex_m7/cortex_m7_startup.s
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,8 @@
* under the License.
*/

#include "syscfg/syscfg.h"

.syntax unified
.arch armv7-m

Expand Down Expand Up @@ -67,6 +69,14 @@ Reset_Handler:
b .L_for_each_zero_region
.L_zero_table_done:

#if MYNEWT_VAL_MAIN_STACK_FILL
ldr r2, =0xdeadbeef
ldr r0, =__StackLimit
0: stm r0!, {r2}
cmp r0, sp
blt 0b
#endif

ldr r0, =__HeapBase
ldr r1, =__HeapLimit
bl _sbrkInit
Expand Down
4 changes: 4 additions & 0 deletions boot/startup/syscfg.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,10 @@ syscfg.defs:
For bootloader it's main stack, for application this stack is used by interrupts
and exceptions.
value: 768
MAIN_STACK_FILL:
description: >
Fill main stack (interrupt stack) with pattern on startup.
value: 0
INCLUDE_IMAGE_HEADER:
description: Add image header to generated executable.
value: 1
Expand Down