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<p class=MsoNormal>My latest endaevor has me cross compiling a stand alone
application for MPC8548 PPC for a U-Boot Based target. There is no Operating
System to run on the target to speak of, just my application. I'm building the
application in Code Warrior using an 8548_init.S hardware intialization file.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>1) My first thought was that this should be as simple as
using the .ELF image that codewarrior produces, right? So I build a simple
hello_world application and sent it down to my target. U-Boot recognizes it as
an ELF image, sets up the segements, and tries to run it! But then low and
behold, the U-Boot flash image comes up again. <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>=> bootelf 400000<o:p></o:p></p>
<p class=MsoNormal>Loading .init @ 0x00002000 (972 bytes)<o:p></o:p></p>
<p class=MsoNormal>Loading .text @ 0x000023d0 (7624 bytes)<o:p></o:p></p>
<p class=MsoNormal>Loading .rodata @ 0x00004198 (256 bytes)<o:p></o:p></p>
<p class=MsoNormal>Loading .ctors @ 0x00004298 (8 bytes)<o:p></o:p></p>
<p class=MsoNormal>Loading .dtors @ 0x000042a0 (8 bytes)<o:p></o:p></p>
<p class=MsoNormal>Loading extab @ 0x000042a8 (16 bytes)<o:p></o:p></p>
<p class=MsoNormal>Loading extabindex @ 0x000042b8 (72 bytes)<o:p></o:p></p>
<p class=MsoNormal>Loading .data @ 0x00004300 (1024 bytes)<o:p></o:p></p>
<p class=MsoNormal>Loading .sdata @ 0x00004700 (44 bytes)<o:p></o:p></p>
<p class=MsoNormal>Clearing .sbss @ 0x00004730 (28 bytes)<o:p></o:p></p>
<p class=MsoNormal>Clearing .bss @ 0x00004750 (784 bytes)<o:p></o:p></p>
<p class=MsoNormal>Loading .abs.00000c00 @ 0x00000c00 (244 bytes)<o:p></o:p></p>
<p class=MsoNormal>## Starting application at 0x00002044 ...<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>U-Boot 1.3.0 (Jul 21 2008 - 12:20:51)<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>CPU: 8548_E, Version: 2.1, (0x80390021)<o:p></o:p></p>
<p class=MsoNormal>Core: E500, Version: 2.2, (0x80210022)<o:p></o:p></p>
<p class=MsoNormal>Clock Configuration:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>2) My next thought was to try and wrap it as a stand alone
application image using "mkimage" Ok, Great To no avail....<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>$ mkimage -A ppc -O u-boot -T standalone -C none -a 2000 -e
2044 -n "Hiya stranger" -d debug.bin uDebug.bin <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>## Total Size = 0x00003ea0 = 16032 Bytes<o:p></o:p></p>
<p class=MsoNormal>=> bootm 400000<o:p></o:p></p>
<p class=MsoNormal>## Booting image at 00400000 ...<o:p></o:p></p>
<p class=MsoNormal> Image Name: Hiya stranger<o:p></o:p></p>
<p class=MsoNormal> Image Type: PowerPC U-Boot Standalone Program
(uncompressed)<o:p></o:p></p>
<p class=MsoNormal> Data Size: 15968 Bytes = 15.6 kB<o:p></o:p></p>
<p class=MsoNormal> Load Address: 00002000<o:p></o:p></p>
<p class=MsoNormal> Entry Point: 00002044<o:p></o:p></p>
<p class=MsoNormal> Verifying Checksum ... OK<o:p></o:p></p>
<p class=MsoNormal>OK<o:p></o:p></p>
<p class=MsoNormal>**bleep**: 00000000 XER: 20000000 LR: 0FFD6378 REGS:
0ff9dc98 TRAP: 0700 DAR: 00000000<o:p></o:p></p>
<p class=MsoNormal>MSR: 00021200 EE: 0 PR: 0 FP: 0 ME: 1 IR/DR: 00<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>GPR00: 0FFD634C 0FF9DD88 00000200 00000001 0FFA048C 00000000
00005E5C 00000000<o:p></o:p></p>
<p class=MsoNormal>GPR08: 00000000 0FF9E00C 00000170 0FFD398C 0FF9DB70 0000C700
0FFF9A00 10040000<o:p></o:p></p>
<p class=MsoNormal>GPR16: 00000000 0FFEC9B4 00000000 00400040 00000001 00400000
00000000 00000001<o:p></o:p></p>
<p class=MsoNormal>GPR24: 0FFF52F8 0FFA0488 00000002 00002044 00400040 0FF9DF80
0FFFA2AC 00400000<o:p></o:p></p>
<p class=MsoNormal>** Illegal Instruction **<o:p></o:p></p>
<p class=MsoNormal>Call backtrace:<o:p></o:p></p>
<p class=MsoNormal>0FFD634C 0FFE3790 0FFE28E4 0FFE2D54 0FFD4600 0FFCABC8
0FFC162C<o:p></o:p></p>
<p class=MsoNormal>Program Check Exception<o:p></o:p></p>
<p class=MsoNormal>**bleep**: 0<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>How do I go about exporting my code warrior application so
that I can run it as stand-alone on a U-Boot based target? Thanks so much<o:p></o:p></p>
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