change log for rtems (2011-07-27)

rtems-vc at rtems.org rtems-vc at rtems.org
Thu Jul 28 02:10:59 UTC 2011


 *strauman*:
2011-07-27  Till Straumann <strauman at slac.stanford.edu>

	* shared/start/start.S, shared/start/preload.S:
	Make sure stack is 16-byte aligned and the TOS
	is tagged with a NULL pointer (used as a terminator
	when printing stack traces).

M  1.266  c/src/lib/libbsp/powerpc/ChangeLog
M    1.3  c/src/lib/libbsp/powerpc/shared/start/preload.S
M   1.29  c/src/lib/libbsp/powerpc/shared/start/start.S

diff -u rtems/c/src/lib/libbsp/powerpc/ChangeLog:1.265 rtems/c/src/lib/libbsp/powerpc/ChangeLog:1.266
--- rtems/c/src/lib/libbsp/powerpc/ChangeLog:1.265	Tue Jul 26 23:21:25 2011
+++ rtems/c/src/lib/libbsp/powerpc/ChangeLog	Wed Jul 27 20:13:19 2011
@@ -1,3 +1,10 @@
+2011-07-27  Till Straumann <strauman at slac.stanford.edu>
+
+	* shared/start/start.S, shared/start/preload.S:
+	Make sure stack is 16-byte aligned and the TOS
+	is tagged with a NULL pointer (used as a terminator
+	when printing stack traces).
+
 2011-07-26  Till Straumann <strauman at slac.stanford.edu>
 
 	* shared/irq/openpic_i8259_irq.c: silenced compiler warnings.

diff -u rtems/c/src/lib/libbsp/powerpc/shared/start/preload.S:1.2 rtems/c/src/lib/libbsp/powerpc/shared/start/preload.S:1.3
--- rtems/c/src/lib/libbsp/powerpc/shared/start/preload.S:1.2	Sun Nov 29 22:32:24 2009
+++ rtems/c/src/lib/libbsp/powerpc/shared/start/preload.S	Wed Jul 27 20:13:20 2011
@@ -84,7 +84,7 @@
  * if DESTINATION_ADDR is not 0
  */
 #define KERNELBASE			0x0
-#define INITIAL_STACK		0x78					/* 8-byte aligned */
+#define INITIAL_STACK		0x70					/* 16-byte aligned */
 #define CACHE_LINE_SIZE		PPC_CACHE_ALIGNMENT 	/* autodetect doesn't work, see below */
 #define	ASSUME_RTEMS_INSTALLS_VECTORS				/* assume we need not load vectors */
 #define DONT_USE_R5_ENTRY							/* always dynamically determine the address we're running from */
@@ -211,6 +211,9 @@
 
 	/* setup initial stack for rtems early boot */
 	li		r1,INITIAL_STACK
+	/* tag TOS with a NULL pointer (for stack trace) */
+	li      r0, 0
+	stw     r0, 0(r1)
 	/* disable the MMU and fire up rtems */
 	mfmsr	r0
 	ori 	r0,r0,MSR_IR|MSR_DR|MSR_IP|MSR_ME

diff -u rtems/c/src/lib/libbsp/powerpc/shared/start/start.S:1.28 rtems/c/src/lib/libbsp/powerpc/shared/start/start.S:1.29
--- rtems/c/src/lib/libbsp/powerpc/shared/start/start.S:1.28	Fri Jan 28 14:29:53 2011
+++ rtems/c/src/lib/libbsp/powerpc/shared/start/start.S	Wed Jul 27 20:13:20 2011
@@ -130,6 +130,12 @@
 	li   r0, (CPU_STACK_ALIGNMENT-1)
 	andc r1, r9, r0
 	/*
+	 * Tag TOS with a NULL (terminator for stack dump)
+	 */
+	li   r0, 0
+	stw  r0, 0(r1)
+	
+	/*
 	 * We are now in a environment that is totally independent from
 	 * bootloader setup.
 	 */



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