make _estack be double-word aligned

dhalbert · dhalbert · commit efbf08266b6d · 2018-01-24T19:24:36.000-05:00
diff --git a/ports/atmel-samd/boards/samd21x18-bootloader-crystalless.ld b/ports/atmel-samd/boards/samd21x18-bootloader-crystalless.ld
@@ -11,7 +11,8 @@ MEMORY
 }
 
 /* top end of the stack */
-_estack = ORIGIN(RAM) + LENGTH(RAM) - 4;
+/* stack must be double-word (8 byte) aligned */
+_estack = ORIGIN(RAM) + LENGTH(RAM) - 8;
 _bootloader_dbl_tap = _estack;
 
 /* define output sections */
diff --git a/ports/atmel-samd/boards/samd21x18-bootloader-external-flash-crystalless.ld b/ports/atmel-samd/boards/samd21x18-bootloader-external-flash-crystalless.ld
@@ -11,7 +11,8 @@ MEMORY
 }
 
 /* top end of the stack */
-_estack = ORIGIN(RAM) + LENGTH(RAM) - 4;
+/* stack must be double-word (8 byte) aligned */
+_estack = ORIGIN(RAM) + LENGTH(RAM) - 8;
 _bootloader_dbl_tap = _estack;
 
 /* define output sections */
diff --git a/ports/atmel-samd/boards/samd21x18-bootloader-external-flash.ld b/ports/atmel-samd/boards/samd21x18-bootloader-external-flash.ld
@@ -10,7 +10,8 @@ MEMORY
 }
 
 /* top end of the stack */
-_estack = ORIGIN(RAM) + LENGTH(RAM) - 4;
+/* stack must be double-word (8 byte) aligned */
+_estack = ORIGIN(RAM) + LENGTH(RAM) - 8;
 _bootloader_dbl_tap = _estack;
 
 /* define output sections */
diff --git a/ports/atmel-samd/boards/samd21x18-bootloader.ld b/ports/atmel-samd/boards/samd21x18-bootloader.ld
@@ -11,7 +11,8 @@ MEMORY
 }
 
 /* top end of the stack */
-_estack = ORIGIN(RAM) + LENGTH(RAM) - 4;
+/* stack must be double-word (8 byte) aligned */
+_estack = ORIGIN(RAM) + LENGTH(RAM) - 8;
 _bootloader_dbl_tap = _estack;
 
 /* define output sections */
diff --git a/ports/atmel-samd/boards/samd51x18-bootloader-external-flash.ld b/ports/atmel-samd/boards/samd51x18-bootloader-external-flash.ld
@@ -10,7 +10,8 @@ MEMORY
 }
 
 /* top end of the stack */
-_estack = ORIGIN(RAM) + LENGTH(RAM) - 4;
+/* stack must be double-word (8 byte) aligned */
+_estack = ORIGIN(RAM) + LENGTH(RAM) - 8;
 _bootloader_dbl_tap = _estack;
 
 /* define output sections */
diff --git a/ports/atmel-samd/boards/samd51x19-bootloader-external-flash.ld b/ports/atmel-samd/boards/samd51x19-bootloader-external-flash.ld
@@ -10,7 +10,8 @@ MEMORY
 }
 
 /* top end of the stack */
-_estack = ORIGIN(RAM) + LENGTH(RAM) - 4;
+/* stack must be double-word (8 byte) aligned */
+_estack = ORIGIN(RAM) + LENGTH(RAM) - 8;
 _bootloader_dbl_tap = _estack;
 
 /* define output sections */
diff --git a/ports/atmel-samd/boards/samd51x19-bootloader.ld b/ports/atmel-samd/boards/samd51x19-bootloader.ld
@@ -10,7 +10,8 @@ MEMORY
 }
 
 /* top end of the stack */
-_estack = ORIGIN(RAM) + LENGTH(RAM) - 4;
+/* stack must be double-word (8 byte) aligned */
+_estack = ORIGIN(RAM) + LENGTH(RAM) - 8;
 _bootloader_dbl_tap = _estack;
 
 /* define output sections */
diff --git a/ports/atmel-samd/boards/samd51x20-bootloader-external-flash.ld b/ports/atmel-samd/boards/samd51x20-bootloader-external-flash.ld
@@ -10,7 +10,8 @@ MEMORY
 }
 
 /* top end of the stack */
-_estack = ORIGIN(RAM) + LENGTH(RAM) - 4;
+/* stack must be double-word (8 byte) aligned */
+_estack = ORIGIN(RAM) + LENGTH(RAM) - 8;
 _bootloader_dbl_tap = _estack;
 
 /* define output sections */
diff --git a/ports/atmel-samd/boards/samd51x20-bootloader.ld b/ports/atmel-samd/boards/samd51x20-bootloader.ld
@@ -10,7 +10,8 @@ MEMORY
 }
 
 /* top end of the stack */
-_estack = ORIGIN(RAM) + LENGTH(RAM) - 4;
+/* stack must be double-word (8 byte) aligned */
+_estack = ORIGIN(RAM) + LENGTH(RAM) - 8;
 _bootloader_dbl_tap = _estack;
 
 /* define output sections */

Original file line number	Diff line number	Diff line change
`@@ -11,7 +11,8 @@ MEMORY`
`11`	`11`	`}`
`12`	`12`
`13`	`13`	`/* top end of the stack */`
`14`		`-_estack = ORIGIN(RAM) + LENGTH(RAM) - 4;`
	`14`	`+/* stack must be double-word (8 byte) aligned */`
	`15`	`+_estack = ORIGIN(RAM) + LENGTH(RAM) - 8;`
`15`	`16`	`_bootloader_dbl_tap = _estack;`
`16`	`17`
`17`	`18`	`/* define output sections */`
Original file line number	Diff line number	Diff line change
`@@ -10,7 +10,8 @@ MEMORY`
`10`	`10`	`}`
`11`	`11`
`12`	`12`	`/* top end of the stack */`
`13`		`-_estack = ORIGIN(RAM) + LENGTH(RAM) - 4;`
	`13`	`+/* stack must be double-word (8 byte) aligned */`
	`14`	`+_estack = ORIGIN(RAM) + LENGTH(RAM) - 8;`
`14`	`15`	`_bootloader_dbl_tap = _estack;`
`15`	`16`
`16`	`17`	`/* define output sections */`