Jens Scharsig wrote:

Hello

I am back again on u-boot. I can't run the have the hello_world example. I get exceptions after start it. So I diassemble and discover the code. I think the entry point is fault or the initcode is missed.

You did not says what address you specified for the "go" command. But if you "read" the README file, it will show you how to run it properly.

... int hello_world (int argc, char *argv[]) { 20000: 4e56 0000 linkw %fp,#0 int i;

/* Print the ABI version */
app_startup(argv);

20004: 2f2e 000c movel %fp@(12),%sp@- 20008: 206d 000c moveal %a5@(12),%a0 2000c: 4e90 jsr %a0@ ...

a0 should load with be contains 00020134

... 00020134 <app_startup>:

extern unsigned long __bss_start, _end;

void app_startup(char **argv) { 20134: 4e56 0000 linkw %fp,#0 unsigned long * cp = &__bss_start; ...

but moveal %a5@(12),%a0 gets a different address. How or where to initialize the a5 register.

Any sugestions

Thx Jens

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Hello again,

int hello_world (int argc, char *argv[]) { 20000: 4e56 0000 linkw %fp,#0 int i;

/* Print the ABI version */
app_startup(argv);

20004: 2f2e 000c movel %fp@(12),%sp@- 20008: 206d 000c moveal %a5@(12),%a0 2000c: 4e90 jsr %a0@

I think, blame it on my problem is the moveal %a5@(12),%a0. I can't find any initilalize command for a5 in the hole code. Has anybody a simple example with a working initialize sequence?

Thx Jens