From: Jens Scharsig <esw@bus-elektronik.de>
To: u-boot@lists.denx.de
Subject: [U-Boot-Users] Coldfile 5282 - Hello_world again
Date: Fri, 27 Jan 2006 16:34:26 +0100 [thread overview]
Message-ID: <drdei2$i0q$1@sea.gmane.org> (raw)
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.
...
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 at -
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
next reply other threads:[~2006-01-27 15:34 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-27 15:34 Jens Scharsig [this message]
2006-01-27 17:29 ` [U-Boot-Users] Coldfile 5282 - Hello_world again Andrew Wozniak
2006-01-30 7:12 ` [U-Boot-Users] " Jens Scharsig
2006-01-30 15:03 ` Jens Scharsig
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