Re: [avr-gcc-list] problems with linker

[Theodore A. Roth]

I don't think there's anything wrong. What you are seeing the
generalization of the linker scripts to handle all the version device
emulations without the need for a linker script for every device.

The 0x2000 is devices with up to 8K of flash. The .data section being
0xffa0 makes sense too, since adding 0x60 (32 regs + 64 io regs) gives you
0x10000, or 64k of sram (the entire addressable sram space if external
sram is enabled). As for eeprom, you _could_ address up to 64K of it, so
let the linker think it can.

If you wish to see how much space your object file is really using, use
'avr-objdump -h'.

Ted Roth

On Wed, 25 Sep 2002, Steve Joiner wrote:

:)
:) Well, I got binutils-2.13, rebuilt avr-gcc and avr-libc.
:) Unfortunately, I still get exactly the same thing -- my sections are
:) the wrong sizes.
:)
:) Anyone have any other ideas?
:)
:) Thanks,
:) Steve
:)
:) --- Raphael Assenat <address@hidden> wrote:
:) > Hi, I also had problems building my avr environment using the latest
:) > cvs
:) > versions of binutils, gcc, and avr-libc, and I followed the same
:) > instructions
:) > as you.
:) >
:) > I could not compile some of my programs, I got a lot of linker errors
:) > similar
:) > to this one:
:) >
:) >
:) 
objs/p1.o(.text+0xb8):/home/raph/0Work/programming/ylib/programs/ATmega163_p1leds/p1.c:228:
:) >
:) > relocation truncated to fit: R_AVR_7_PCREL no symbol
:) > objs/p1.o(.text+0x37c): In function `_p1_expand_data':
:) >
:) > I dont understand what exactly was the problem, but when I replaced
:) > binutils
:) > by the latest release(2.13)(not cvs snapshot) and recompiled gcc (3.3
:) >
:) > 20020924) as well as avrl-libc (latest cvs), everything went well.
:) >
:) > I dont know if you're doing something wrong, but maybe you can try
:) > binutils
:) > 2.13 and see if the problem you've found is fixed.
:) >
:) > I hope this helps.
:) >
:) > On Tuesday 24 September 2002 04:48 pm, you wrote:
:) > > Hello,
:) > >
:) > > I'm trying to get my avr build environment working.  I've got the
:) > > latest snapshots of binutils and gcc (binutils-020924 and
:) > > gcc-20020923).  I also grabbed avr-libc from CVS today (9/24).  I
:) > > followed the instructions at
:) > >
:) > >
:) >
:) http://savannah.nongnu.org/download/avr-libc/doc/avr-libc-user-manual/insta
:) > >ll_tools.html
:) > >
:) > > and was able to build and install everything without any problems.
:) > > I've got a simple program, foo.c that I'm trying to compile for the
:) > > at90s4433.  I issue the following command:
:) > >
:) > > avr-gcc -g -mmcu=at90s4433 -Wl,-Map,foo.map foo.c
:) > >
:) > > It builds successfully, but the start of the map file looks like
:) > this:
:) > >
:) > > Archive member included because of file (symbol)
:) > >
:) > > /usr/local/atmel/lib/gcc-lib/avr/3.3/libgcc.a(_copy_data.o)
:) > >                               /tmp/ccgWgtvZ.o (__do_copy_data)
:) > > /usr/local/atmel/lib/gcc-lib/avr/3.3/libgcc.a(_clear_bss.o)
:) > >                               /tmp/ccgWgtvZ.o (__do_clear_bss)
:) > >
:) > > Memory Configuration
:) > >
:) > > Name             Origin             Length             Attributes
:) > > text             0x00000000         0x00002000         xr
:) > > data             0x00800060         0x0000ffa0         rw !x
:) > > eeprom           0x00810000         0x00010000         rw !x
:) > > *default*        0x00000000         0xffffffff
:) > >
:) > > Linker script and memory map
:) > >
:) > > LOAD
:) > > /usr/local/atmel/lib/gcc-lib/avr/3.3/../../../../avr/lib/crts4433.o
:) > > LOAD /tmp/ccgWgtvZ.o
:) > > LOAD /usr/local/atmel/lib/gcc-lib/avr/3.3/libgcc.a
:) > > LOAD
:) > /usr/local/atmel/lib/gcc-lib/avr/3.3/../../../../avr/lib/libc.a
:) > > LOAD /usr/local/atmel/lib/gcc-lib/avr/3.3/libgcc.a
:) > >
:) > > This seems wrong to me because it is reporting the length of the
:) > text
:) > > section as 0x2000 and the length of the data section as 0xffa0.
:) > > According to the data sheet, they should be 0x800 and 0xf0,
:) > > respectively.  The eeprom length looks wrong too.
:) > >
:) > > Can anyone tell me what I'm doing wrong here?
:) > >
:) > > Thanks,
:) > > Steve
:) > >
:) > >
:) > >
:) > >
:) > >
:) > > __________________________________________________
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:)
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