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<div class="moz-cite-prefix">Den 02-06-2013 23:15, Michael Ring
skrev:<br>
</div>
<blockquote cite="mid:51ABB5F2.6080305@michael-ring.org" type="cite">
<meta content="text/html; charset=ISO-8859-1"
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<div class="moz-cite-prefix">Unfortunately that does not seem to
work (or I use it wrong):<br>
<br>
This procedure:<br>
<br>
procedure _general_exception_handler; assembler; nostackframe;
public name '_GENERAL_EXCEPTION_HANDLER';<br>
asm<br>
.section "reset"<br>
sdbbp 0;<br>
.Lloopb:<br>
b .Lloopb<br>
end;<br>
<br>
translates to:<br>
<br>
.section .text.n_pic32mx1xxfxxxc_$$__general_exception_handler<br>
.balign 4<br>
.globl PIC32MX1XXFXXXC_$$__GENERAL_EXCEPTION_HANDLER<br>
.type
PIC32MX1XXFXXXC_$$__GENERAL_EXCEPTION_HANDLER,@function<br>
PIC32MX1XXFXXXC_$$__GENERAL_EXCEPTION_HANDLER:<br>
.globl _GENERAL_EXCEPTION_HANDLER<br>
.type _GENERAL_EXCEPTION_HANDLER,@function<br>
_GENERAL_EXCEPTION_HANDLER:<br>
.ent PIC32MX1XXFXXXC_$$__GENERAL_EXCEPTION_HANDLER<br>
<br>
.section reset<br>
sdbbp 0<br>
.Lj11:<br>
b .Lj11<br>
jr $ra<br>
nop<br>
.set macro<br>
.set reorder<br>
.end PIC32MX1XXFXXXC_$$__GENERAL_EXCEPTION_HANDLER<br>
.Lt3:<br>
.Le2:<br>
.size PIC32MX1XXFXXXC_$$__GENERAL_EXCEPTION_HANDLER,
.Le2 - PIC32MX1XXFXXXC_$$__GENERAL_EXCEPTION_HANDLER<br>
.Ll8:<br>
<br>
which creates an assembler error:<br>
<br>
/Users/ring/devel/fpc/rtl/units/mipsel-embedded/pic32mx1xxfxxxc.s:94:
Error: operation combines symbols in different segments<br>
<br>
the error is from the .size line.<br>
<br>
<br>
<br>
Am 02.06.13 22:51, schrieb Jeppe Græsdal Johansen:<br>
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<blockquote cite="mid:51ABB040.70305@j-software.dk" type="cite">
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<div class="moz-cite-prefix">Den 02-06-2013 22:41, Michael Ring
skrev:<br>
</div>
<blockquote cite="mid:51ABADE9.2010307@michael-ring.org"
type="cite">
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charset=ISO-8859-1">
Hi, perhaps I am overseeing a simple solution for my problem:<br>
<br>
On the pic32 there are two flash areas, one at 0x9d000000 for
the main program and another at 0xbfc00000 that is called Boot
Flash. On reset the program starts in the boot flash at the
first address.<br>
<br>
I have written the startup code for the chips now but I need
to distribute some procedures between the two memory areas,
for obvious reasons I must have some code at address
0xbfc00000 or the chip will not boot correctly ;-).<br>
<br>
My thought was now to tweak the linker script in the same way
the original linker scripts of pic32 work:<br>
<br>
MEMORY<br>
{<br>
kseg0_program_mem (rx) : ORIGIN = 0x9D000000, LENGTH =
0x80000<br>
kseg1_boot_mem : ORIGIN = 0xBFC00000, LENGTH =
0x490<br>
}<br>
<br>
SECTIONS<br>
{<br>
.reset _RESET_ADDR :<br>
{<br>
KEEP(*(.reset))<br>
KEEP(*(.reset.startup))<br>
} > kseg1_boot_mem<br>
}<br>
<br>
In assembler I can then simply write: <br>
.section .reset,code and<br>
.section .reset.startup,code<br>
<br>
and then the code, this will automagically end up in the
kseg1_boot_mem, but this does not work with the inline
assembler. Any ideas on how to do this the correct way? Is
there something more intelligent than to write a plain
assembler file?<br>
<br>
TnX,<br>
<br>
Michael<br>
</blockquote>
<br>
You should be able to use<br>
.section ".reset" </blockquote>
<br>
</blockquote>
<br>
Try<br>
<br>
procedure _general_exception_handler; assembler; nostackframe;
public name '_GENERAL_EXCEPTION_HANDLER';<br>
asm<br>
.section "reset"<br>
sdbbp 0;<br>
.Lloopb:<br>
b .Lloopb<br>
.text<br>
end;<br>
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