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How to load a RedBoot(RAM) through RedBoot(ROM)
- From: "yzj" <yzj at chinadigipro dot com>
- To: <ecos-discuss at ecos dot sourceware dot org>
- Date: Tue, 9 Mar 2004 16:38:02 +0800
- Subject: [ECOS] How to load a RedBoot(RAM) through RedBoot(ROM)
My target board is SNDS100, i made a RedBoot(starup from ROM),
and the RedBoot(ROM) is running OK!
The following is the boot message.
RedBoot(tm) bootstrap and debug environment [ROM]
Non-certified release, version UNKNOWN - built 09:36:00, Mar 9 2004
Platform: Samsung SNDS (ARM 7TDMI)
Copyright (C) 2000, 2001, 2002, Red Hat, Inc.
RAM: 0x00000000-0x01000000, [0x000059d8-0x01000000] available
RedBoot>
the memory layout of my RedBoot(ROM) is bellow:
section size addr
.rom_vectors 0x40 0x1800000
.text 0xbdf8 0x1800040
.fini 0x0 0x180be38
.rodata 0x1a8c 0x180be38
.rodata1 0x0 0x180d8c4
.fixup 0x0 0x180d8c4
.gcc_except_table 0x0 0x180d8c4
.fixed_vectors 0x140 0x20
.data 0x474 0x200
.bss 0x5360 0x674
Total 0x131d8
then i made a RedBoot(RAM), memory layout:
section size addr
.fixed_vectors 0x140 0x10200
.rom_vectors 0x40 0x20000
.text 0x8034 0x20040
.fini 0x0 0x28074
.rodata 0x1a44 0x28074
.rodata1 0x0 0x29ab8
.fixup 0x0 0x29ab8
.gcc_except_table 0x0 0x29ab8
.data 0x3ec 0x29ab8
.bss 0x33c0 0x29ea4
Total 0xd3a4
and i loaded this RedBoot(RAM) through xModem, it seem OK!
RedBoot> load -m xm
CCCCCCCCCEntry point: 0x00020040, address range: 0x00020000-0x00029ea4
xyzModem - CRC mode, 676(SOH)/0(STX)/0(CAN) packets, 9 retries
but when i type go i get the following
RedBoot> go
$T050f:88130000;0d:00000000;#e1$T050f:88130000;0d:00000000;#e1
it looks like the GDB stub.
i guess this is because of the memory loyout of the RedBoot(RAM)
how can i do??
thank you !