This is the mail archive of the
ecos-discuss@sources.redhat.com
mailing list for the eCos project.
porting to Atmel-AT91, stub memory-layout, .bss does not fit
- To: ecos-discuss at sources dot redhat dot com
- Subject: [ECOS] porting to Atmel-AT91, stub memory-layout, .bss does not fit
- From: Andreas Bürgel <ab at genologic dot de>
- Date: Mon, 30 Oct 2000 14:47:23 +0100
- Organization: GenoLogic GmbH, Dortmund
Hi,
I'm porting eCos to a custom board with the Atmel AT91 processor
(ARM7TDMI-core, 8kB on-chip SRAM), using the edb7xxx as template.
After processor-reset the processor has the following memory map:
0x00000000 - 0x000FFFFF external device such as boot-PROM/Flash
0x00300000 - 0x0031FFFF 8kB on-chip SRAM
0xFFC00000 - 0xFFFFFFFF on-chip peripherals I/O
other address-space is reserved
So I wrote the following ldi-file:
MEMORY
{
rom : ORIGIN = 0, LENGTH = 0x80000
reserved : ORIGIN = 0x100000, LENGTH = 0x200000
onchip_ram : ORIGIN = 0x300000, LENGTH = 0x2000
reserved2 : ORIGIN = 0x302000, LENGTH = 0xff8fe000
peripheral : ORIGIN = 0xffc00000, LENGTH = 0x3fffff
}
SECTIONS
{
SECTIONS_BEGIN
SECTION_rom_vectors (rom, 0, LMA_EQ_VMA)
SECTION_rodata (rom, ALIGN (0x4), LMA_EQ_VMA)
SECTION_text (rom, ALIGN (0x4), LMA_EQ_VMA)
SECTION_data (rom, ALIGN (0x4), LMA_EQ_VMA)
SECTION_bss (onchip_ram, 0x300000, LMA_EQ_VMA)
SECTIONS_END
}
When I'm compiling the GDB-Stub, the linkers says
"/tools/H-i686-pc-linux-gnu/arm-elf/bin/ld: address 0x302dbc of
/boeller/home/andreas/develop/eCos/AT91/install/bin/gdb_module.img
section .bss is not within region onchip_ram"
Who eats up the on-chip ram space? The stub isn't much more than a
skeleton.
Thanks in advance.
--
--------------------------------------------------
Andreas Bürgel Software Engineer
ab@genologic.de GenoLogic GmbH, Dortmund, Germany