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Change the function that sets up the initial stack on CM3 ports to account for the post decrement used by the MCU when it alters the stack on the way into/out of interrupts.

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Richard Barry 2009-11-14 19:02:12 +00:00
parent a06c91fcc1
commit a9625ce462
4 changed files with 4 additions and 0 deletions
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1
Source/portable/GCC/ARM_CM3/port.c
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@ -115,6 +115,7 @@ portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE
{ {
/* Simulate the stack frame as it would be created by a context switch /* Simulate the stack frame as it would be created by a context switch
interrupt. */ interrupt. */
pxTopOfStack--; /* Offset added to account for the way the MCU uses the stack on entry/exit of interrupts. */
*pxTopOfStack = portINITIAL_XPSR; /* xPSR */ *pxTopOfStack = portINITIAL_XPSR; /* xPSR */
pxTopOfStack--; pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) pxCode; /* PC */ *pxTopOfStack = ( portSTACK_TYPE ) pxCode; /* PC */

1
Source/portable/GCC/ARM_CM3_MPU/port.c
View file

@ -164,6 +164,7 @@ portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE
{ {
/* Simulate the stack frame as it would be created by a context switch /* Simulate the stack frame as it would be created by a context switch
interrupt. */ interrupt. */
pxTopOfStack--; /* Offset added to account for the way the MCU uses the stack on entry/exit of interrupts. */
*pxTopOfStack = portINITIAL_XPSR; /* xPSR */ *pxTopOfStack = portINITIAL_XPSR; /* xPSR */
pxTopOfStack--; pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) pxCode; /* PC */ *pxTopOfStack = ( portSTACK_TYPE ) pxCode; /* PC */

1
Source/portable/IAR/ARM_CM3/port.c
View file

@ -116,6 +116,7 @@ portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE
{ {
/* Simulate the stack frame as it would be created by a context switch /* Simulate the stack frame as it would be created by a context switch
interrupt. */ interrupt. */
pxTopOfStack--; /* Offset added to account for the way the MCU uses the stack on entry/exit of interrupts. */
*pxTopOfStack = portINITIAL_XPSR; /* xPSR */ *pxTopOfStack = portINITIAL_XPSR; /* xPSR */
pxTopOfStack--; pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) pxCode; /* PC */ *pxTopOfStack = ( portSTACK_TYPE ) pxCode; /* PC */

1
Source/portable/RVDS/ARM_CM3/port.c
View file

@ -108,6 +108,7 @@ portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE
{ {
/* Simulate the stack frame as it would be created by a context switch /* Simulate the stack frame as it would be created by a context switch
interrupt. */ interrupt. */
pxTopOfStack--; /* Offset added to account for the way the MCU uses the stack on entry/exit of interrupts. */
*pxTopOfStack = portINITIAL_XPSR; /* xPSR */ *pxTopOfStack = portINITIAL_XPSR; /* xPSR */
pxTopOfStack--; pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) pxCode; /* PC */ *pxTopOfStack = ( portSTACK_TYPE ) pxCode; /* PC */