From: richardbarry <richardbarry@1d2547de-c912-0410-9cb9-b8ca96c0e9e2>
Date: Sat, 14 Nov 2009 19:02:12 +0000 (+0000)
Subject: Change the function that sets up the initial stack on CM3 ports to account for the... 
X-Git-Tag: V6.0.1~2
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=fe4172a673fcc37bf8af83ab8dacab6f3b6952fe;p=freertos

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.

git-svn-id: https://svn.code.sf.net/p/freertos/code/trunk@933 1d2547de-c912-0410-9cb9-b8ca96c0e9e2
---

diff --git a/Source/portable/GCC/ARM_CM3/port.c b/Source/portable/GCC/ARM_CM3/port.c
index 146efa7ea..c9f317d34 100644
--- a/Source/portable/GCC/ARM_CM3/port.c
+++ b/Source/portable/GCC/ARM_CM3/port.c
@@ -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
 	interrupt. */
+	pxTopOfStack--; /* Offset added to account for the way the MCU uses the stack on entry/exit of interrupts. */
 	*pxTopOfStack = portINITIAL_XPSR;	/* xPSR */
 	pxTopOfStack--;
 	*pxTopOfStack = ( portSTACK_TYPE ) pxCode;	/* PC */
diff --git a/Source/portable/GCC/ARM_CM3_MPU/port.c b/Source/portable/GCC/ARM_CM3_MPU/port.c
index 859fc5b83..7b2d7254a 100644
--- a/Source/portable/GCC/ARM_CM3_MPU/port.c
+++ b/Source/portable/GCC/ARM_CM3_MPU/port.c
@@ -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
 	interrupt. */
+	pxTopOfStack--; /* Offset added to account for the way the MCU uses the stack on entry/exit of interrupts. */
 	*pxTopOfStack = portINITIAL_XPSR;	/* xPSR */
 	pxTopOfStack--;
 	*pxTopOfStack = ( portSTACK_TYPE ) pxCode;	/* PC */
diff --git a/Source/portable/IAR/ARM_CM3/port.c b/Source/portable/IAR/ARM_CM3/port.c
index ff794e4b3..e2ce7fca1 100644
--- a/Source/portable/IAR/ARM_CM3/port.c
+++ b/Source/portable/IAR/ARM_CM3/port.c
@@ -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
 	interrupt. */
+	pxTopOfStack--; /* Offset added to account for the way the MCU uses the stack on entry/exit of interrupts. */
 	*pxTopOfStack = portINITIAL_XPSR;	/* xPSR */
 	pxTopOfStack--;
 	*pxTopOfStack = ( portSTACK_TYPE ) pxCode;	/* PC */
diff --git a/Source/portable/RVDS/ARM_CM3/port.c b/Source/portable/RVDS/ARM_CM3/port.c
index 6bee97c46..11e7d1874 100644
--- a/Source/portable/RVDS/ARM_CM3/port.c
+++ b/Source/portable/RVDS/ARM_CM3/port.c
@@ -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
 	interrupt. */
+	pxTopOfStack--; /* Offset added to account for the way the MCU uses the stack on entry/exit of interrupts. */
 	*pxTopOfStack = portINITIAL_XPSR;	/* xPSR */
 	pxTopOfStack--;
 	*pxTopOfStack = ( portSTACK_TYPE ) pxCode;	/* PC */