uaa@rouge:~/utk/utkernel_source/kernel/sysmain/build/app_h8s2212$ h8300-elf-gdb  kernel-rom.rom
GNU gdb 6.7
Copyright (C) 2007 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "--host=i686-pc-linux-gnu --target=h8300-elf"...
(gdb) target sim
Connected to the simulator.
(gdb) load
Loading section .text, size 0x39f0 vma 0x0
Loading section .data, size 0x40 vma 0xf780
Start address 0x0
Transfer rate: 119168 bits in <1 sec.
(gdb) show arch
The target architecture is set automatically (currently h8300hn)
(gdb) b __reset
Breakpoint 1 at 0x0
(gdb) b _start
Breakpoint 2 at 0x204
(gdb) info reg
The program has no registers now.
(gdb) run
Starting program: /home/uaa/utk/utkernel_source/kernel/sysmain/build/app_h8s2212/kernel-rom.rom 

Breakpoint 1, 0x00000000 in __reset ()
(gdb) info reg
r0             0x0000  0
r1             0x0000  0
r2             0x0000  0
r3             0x0000  0
r4             0x0000  0
r5             0x0000  0
r6             0x0000  0
sp             0x0000  0
ccr            0x00        0	I-0 UI-0 H-0 U-0 N-0 Z-0 V-0 C-0 u> u>= != >= > 
pc             0x0000  0
cycles         0x0004  4
tick           0x0002  2
inst           0x0000  0
(gdb) jump _start
Continuing at 0x204.

Breakpoint 2, 0x00000204 in _start ()
(gdb) disas _start
Dump of assembler code for function _start:
0x00000204 <_start+0>:	mov.l	#0xff80,er7
0x0000020a <_start+6>:	ldc	#0xc0,ccr
0x0000020c <_start+8>:	mov.w	#0xf780,r2
0x00000210 <_start+12>:	mov.w	#0xf7c0,r3
0x00000214 <_start+16>:	cmp.w	r2,r3
0x00000216 <_start+18>:	ble	.+22 (0x22e)
0x00000218 <_start+20>:	mov.w	#0x39f0,r1
End of assembler dump.
(gdb) ni
0x0000020a in _start ()
(gdb) info reg
r0             0x0000  0
r1             0x0000  0
r2             0x0000  0
r3             0x0000  0
r4             0x0000  0
r5             0x0000  0
r6             0x0000  0
sp             0x0000  0
ccr            0x00        0	I-0 UI-0 H-0 U-0 N-0 Z-0 V-0 C-0 u> u>= != >= > 
pc             0x020a  522
cycles         0x000a  10
tick           0x0004  4
inst           0x0000  0
(gdb) ni
0x0000020c in _start ()
(gdb) info reg
r0             0x0000  0
r1             0x0000  0
r2             0x0000  0
r3             0x0000  0
r4             0x0000  0
r5             0x0000  0
r6             0x0000  0
sp             0x0000  0
ccr            0x00        0	I-0 UI-0 H-0 U-0 N-0 Z-0 V-0 C-0 u> u>= != >= > 
pc             0x020c  524
cycles         0x000c  12
tick           0x0005  5
inst           0x0000  0
(gdb) ni
0x00000210 in _start ()
(gdb) info reg
r0             0x0000  0
r1             0x0000  0
r2             0xf780  63360
r3             0x0000  0
r4             0x0000  0
r5             0x0000  0
r6             0x0000  0
sp             0x0000  0
ccr            0x00        0	I-0 UI-0 H-0 U-0 N-0 Z-0 V-0 C-0 u> u>= != >= > 
pc             0x0210  528
cycles         0x0010  16
tick           0x0006  6
inst           0x0000  0
(gdb) ni
0x00000214 in _start ()
(gdb) info reg
r0             0x0000  0
r1             0x0000  0
r2             0xf780  63360
r3             0xf7c0  63424
r4             0x0000  0
r5             0x0000  0
r6             0x0000  0
sp             0x0000  0
ccr            0x00        0	I-0 UI-0 H-0 U-0 N-0 Z-0 V-0 C-0 u> u>= != >= > 
pc             0x0214  532
cycles         0x0014  20
tick           0x0007  7
inst           0x0000  0
(gdb)