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Change the stack alignment when a task first starts in the CM4F GCC, Tasking and Keil ports.

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This commit is contained in:
Richard Barry 2012-04-16 18:23:32 +00:00
parent 68289d136f
commit 63369b2a97
6 changed files with 20 additions and 6 deletions
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4
Source/portable/GCC/ARM_CM4F/port.c
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@ -126,7 +126,7 @@ portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE
/* Offset added to account for the way the MCU uses the stack on entry/exit
of interrupts, and to ensure alignment. */
pxTopOfStack -= 2;
pxTopOfStack--;
*pxTopOfStack = portINITIAL_XPSR; /* xPSR */
pxTopOfStack--;
@ -138,7 +138,7 @@ portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE
pxTopOfStack -= 5; /* R12, R3, R2 and R1. */
*pxTopOfStack = ( portSTACK_TYPE ) pvParameters; /* R0 */
/* A save method is being used that requiers each task to maintain its
/* A save method is being used that requires each task to maintain its
own exec return value. */
pxTopOfStack--;
*pxTopOfStack = portINITIAL_EXEC_RETURN;