<p dir="ltr">Thanks all, but my problem was much simpler, not including confdefs.h I copied one of the included samples and am getting much further.<br>
</p>
<div class="gmail_quote">On 14 Feb 2013 20:14, "Joel Sherrill" <<a href="mailto:joel.sherrill@oarcorp.com">joel.sherrill@oarcorp.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On 2/14/2013 2:00 PM, Matthew J Fletcher wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On 14/02/13 19:38, Gedare Bloom wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On Thu, Feb 14, 2013 at 2:16 PM, Joel Sherrill<br>
<<a href="mailto:joel.sherrill@oarcorp.com" target="_blank">joel.sherrill@oarcorp.com</a>> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On 2/14/2013 1:09 PM, Matthew J Fletcher wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi,<br>
<br>
I am using RTEMS 4.10.2, and a custom BSP based on the ARM rtl22xx.<br>
<br>
I am running through the asm startup ok and calling into boot_card(),<br>
stepping through its all working fine, work_area_start, work_area_size,<br>
heap_start and heap_size are setup as i expect from my linkscript.<br>
<br>
But the test of "work_area_size <= Configuration.work_space_size" fails<br>
because Configuration.work_space_size looks like 0xfffffff, the only<br>
place that assigns to Configuration.work_space_size is a few lines<br>
further down.<br>
<br>
Does this code presume that the BSP has set the Configuration structure<br>
to zero, or the whole memory ? even so the aforementioned test seems odd<br>
as its just testing memory has been initialised.<br>
<br>
</blockquote></blockquote>
We do assume the .bss section is initialized to 0, although I'm not<br>
sure if that is still a necessary assumption. But I don't think that<br>
is the problem here, because if the value of<br>
Configuration.work_space_size was 0 then this test would still fail.<br>
<br>
The work_space_size calculation is done in the<br>
cpukit/sapi/include/confdefs.h file, but that can be a bit messy to<br>
try to figure out.<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Or am i missing some RTEMS initialisation call that needs to be done<br>
before boot_card() ?<br>
</blockquote>
No but there may be some basic C language assumptions not<br>
being met. Configuration is in the .data section and that value<br>
does not look like it was initialized to.<br>
<br>
Is your download correct?<br>
<br>
</blockquote>
You can disassemble your binary image and inspect the value of the<br>
Configuration.work_space_size field in the data section.<br>
</blockquote>
Sorry i dont seem to have the objdump skills, i did a -D (disassemble<br>
all sections), although it produced massive output i dont see a<br>
structure called 'Configuration', i get a block like<br>
<br>
814085f4 <Configuration>:<br>
814085f4: 00000000 andeq r0, r0, r0<br>
814085f8: 00010830 andeq r0, r1, r0, lsr r8<br>
</blockquote>
This isn't code but this is enough to see that what is in memory and used<br>
by the code is NOT what was in the object. The workspace_address field<br>
is 0. The second field is the size and is 0x00010830. You saw 0xFFFFFFFFF.<br>
<br>
Either the download didn't go where you thought, memory access isn't<br>
setup write, etc.<br>
<br>
Download and look at those two addresses BEFORE you run at all.<br>
If you don't see those values, it is nothing to do with RTEMS. :)<br>
<br>
.bss is uninitialized global and static date. It gets zeroed.<br>
.data is your global and static data that is initialized.<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
814085fc: 00000000 andeq r0, r0, r0<br>
81408600: 00002710 andeq r2, r0, r0, lsl r7<br>
81408604: 00000032 andeq r0, r0, r2, lsr r0<br>
81408608: 8118d3a0 tsthi r8, r0, lsr #7<br>
8140860c: 00001000 andeq r1, r0, r0<br>
81408610: 00001000 andeq r1, r0, r0<br>
...<br>
81408620: 00000002 andeq r0, r0, r2<br>
81408624: 00000002 andeq r0, r0, r2<br>
81408628: 8140868c smlalbbhi r8, r0, ip, r6<br>
8140862c: 00000001 andeq r0, r0, r1<br>
81408630: 8140866c cmphi r0, ip, ror #12<br>
<br>
is it possible to pretty print that in some way ?<br>
<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
- Matthew<br>
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</blockquote>
<br>
<br>
--<br>
Joel Sherrill, Ph.D. Director of Research & Development<br>
joel.sherrill@OARcorp.com On-Line Applications Research<br>
Ask me about RTEMS: a free RTOS Huntsville AL 35805<br>
Support Available (256) 722-9985<br>
<br>
<br>
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</blockquote></blockquote>
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</blockquote>
<br>
<br>
-- <br>
Joel Sherrill, Ph.D. Director of Research & Development<br>
joel.sherrill@OARcorp.com On-Line Applications Research<br>
Ask me about RTEMS: a free RTOS Huntsville AL 35805<br>
Support Available (256) 722-9985<br>
<br>
</blockquote></div>