Re: [OpenBIOS] Booting SunOS from OpenBIOS

[Tarl Neustaedter]

On 2013-Mar-26 04:33 , Artyom Tarasenko wrote:
> Not a bootable ELF image
> Loading a.out image...
> Loaded 7680 bytes
> entry point is 0x4000
> bootpath: /iommu/sbus/espdma/esp/sd@0,0
>
> Jumping to entry point 00004000 for type 00000005...
> switching to new context:
> Unhandled Exception 0x00000007
> PC = 0x00401a04 NPC = 0x00401a08
> Stopping execution
>
> Is the OpenBIOS guess correct and SunOS 4.x actually does have an a.out loader?

It shouldn't be a.out. The bootloader (on blocks 1-15) of a Solaris disk 
is an fcode file (compiled forth).

Booting SunOS from OpenBIOS

[Artyom Tarasenko]

On Tue, Mar 26, 2013 at 5:12 PM, Tarl Neustaedter  wrote:
> On 2013-Mar-26 04:33 , Artyom Tarasenko wrote:
> > Not a bootable ELF image
> > Loading a.out image...
> > Loaded 7680 bytes
> > entry point is 0x4000
> > bootpath: /iommu/sbus/espdma/esp/sd@0,0
> >
> > Jumping to entry point 00004000 for type 00000005...
> > switching to new context:
> > Unhandled Exception 0x00000007
> > PC = 0x00401a04 NPC = 0x00401a08
> > Stopping execution
> >
> > Is the OpenBIOS guess correct and SunOS 4.x actually does have an a.out
> > loader?
>
> It shouldn't be a.out. The bootloader (on blocks 1-15) of a Solaris disk is
> an fcode file (compiled forth).

That would explain it, but are you sure that was already so in the
SunOS 4.x times?

$ dd if=sunos.img of=sunos4.bb bs=512 skip=1 count=15
15+0 records in
15+0 records out
7680 bytes (7.7 kB) copied, 6.3956e-05 s, 120 MB/s
$  file sunos4.bb
sunos4.bb: sparc executable not stripped
$  sparc64-linux-gnu-objdump -x sunos4.bb

sunos4.bb:     file format a.out-sunos-big
sunos4.bb
architecture: sparc, flags 0x0000003e:
EXEC_P, HAS_LINENO, HAS_DEBUG, HAS_SYMS, HAS_LOCALS
start address 0x00440000

Sections:
Idx Name          Size      VMA               LMA               File off  Algn
  0 .text         00001a58  00000000  00000000  00000020  2**3
                  CONTENTS, ALLOC, LOAD, CODE
  1 .data         00000310  00001a58  00001a58  00001a78  2**3
                  CONTENTS, ALLOC, LOAD, DATA
  2 .bss          0000c588  00001d68  00001d68  00000000  2**3
                  ALLOC
sparc64-linux-gnu-objdump: sunos4.bb: File truncated