change log for rtems (2011-07-27)
Joel Sherrill
joel.sherrill at OARcorp.com
Thu Jul 28 13:25:27 UTC 2011
Till,
Some powerpc bsps have their own start.S including
qemuppc and psim. Could you make a sweep across
them and see if this needs to be done to them?
Thanks.
--joel
On 07/27/2011 09:10 PM, rtems-vc at rtems.org wrote:
> *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
> <http://www.rtems.com/cgi-bin/viewcvs.cgi//rtems/c/src/lib/libbsp/powerpc/ChangeLog.diff?r1=text&tr1=1.265&r2=text&tr2=1.266&diff_format=h>
> 1.266 c/src/lib/libbsp/powerpc/ChangeLog
> M
> <http://www.rtems.com/cgi-bin/viewcvs.cgi//rtems/c/src/lib/libbsp/powerpc/shared/start/preload.S.diff?r1=text&tr1=1.2&r2=text&tr2=1.3&diff_format=h>
> 1.3 c/src/lib/libbsp/powerpc/shared/start/preload.S
> M
> <http://www.rtems.com/cgi-bin/viewcvs.cgi//rtems/c/src/lib/libbsp/powerpc/shared/start/start.S.diff?r1=text&tr1=1.28&r2=text&tr2=1.29&diff_format=h>
> 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.
> */
>
> --
> Generated by Deluxe Loginfo
> <http://www.codewiz.org/projects/index.html#loginfo> 2.122 by Bernardo
> Innocenti <bernie at develer.com>
>
--
Joel Sherrill, Ph.D. Director of Research& Development
joel.sherrill at OARcorp.com On-Line Applications Research
Ask me about RTEMS: a free RTOS Huntsville AL 35805
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