[U-Boot-Users] trouble to build u-boot.bin with objcopy

[U-Boot-Users] trouble to build u-boot.bin with objcopy

[valerian NA]

Hi all,

I work with a linux cross-compiler (codesourcery with gcc 4.2.3) for
embedded powerpc targets (mpc8248).
So I tried to compile u-boot (version 1.1.6). It works fine with another and
older version of gcc (3.3.2) but with the new cross-compiler (4.2.3) I have
trouble to do this part :
powerpc-linux-gnu-objcopy --gap-fill 0xff -O binary u-boot u-boot.bin

This command freezes and uses a lot of memory without sucess (maybe I have
not enough disk space).

I decided to launch without "--gap-fill" to see the reaction :
powerpc-linux-gnu-objcopy -O binary u-boot u-boot.bin
It creates u-boot.bin file, and the system (host ls -al) tells that this
file has a size nearest to 4GiB

So I think it's a problem in the mapping of u-boot :
powerpc-linux-gnu-objdump -h u-boot

u-boot:     file format elf32-powerpc

Sections:
Idx Name          Size      VMA       LMA       File off  Algn
  0 .text         00017e18  fc000000  fc000000  00002138  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
  1 .reloc        00000804  fc018000  fc018000  0001a138  2**0
                  CONTENTS, ALLOC, LOAD, DATA
  2 .data         00001060  fc018804  fc018804  0001a93c  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  3 .data.rel.ro.local 0000003c  fc019864  fc019864  0001b99c  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  4 .data.rel     0000003c  fc0198a0  fc0198a0  0001b9d8  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  5 .data.rel.local 00000634  fc0198dc  fc0198dc  0001ba14  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  6 .ppcenv       00000200  fc019f10  fc019f10  0001c048  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  7 .u_boot_cmd   000000dc  fc01a110  fc01a110  0001c248  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  8 .bss          00001bf8  fc01b000  fc01b000  0001d138  2**3
                  ALLOC
  9 .debug_line   0000607d  00000000  00000000  0001d138  2**0
                  CONTENTS, READONLY, DEBUGGING
 10 .debug_info   00027d84  00000000  00000000  000231b5  2**0
                  CONTENTS, READONLY, DEBUGGING
 11 .debug_abbrev 00005254  00000000  00000000  0004af39  2**0
                  CONTENTS, READONLY, DEBUGGING
 12 .debug_aranges 00000660  00000000  00000000  00050190  2**3
                  CONTENTS, READONLY, DEBUGGING
 13 .rodata.str1.1 0000209e  00000660  00000660  00000094  2**0
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
 14 .debug_frame  000026cc  00000000  00000000  000507f0  2**2
                  CONTENTS, READONLY, DEBUGGING
 15 .debug_loc    0000c9c7  00000000  00000000  00052ebc  2**0
                  CONTENTS, READONLY, DEBUGGING
 16 .debug_pubnames 000016b1  00000000  00000000  0005f883  2**0
                  CONTENTS, READONLY, DEBUGGING
 17 .debug_str    000043d5  00000000  00000000  00060f34  2**0
                  CONTENTS, READONLY, DEBUGGING
 18 .comment      000006d6  00000000  00000000  00065309  2**0
                  CONTENTS, READONLY
 19 .note.GNU-stack 00000000  00000000  00000000  000659df  2**0
                  CONTENTS, READONLY
 20 .gnu.attributes 00000384  00000000  00000000  000659df  2**0
                  CONTENTS, READONLY
 21 .debug_ranges 00000f60  00000000  00000000  00065d63  2**0
                  CONTENTS, READONLY, DEBUGGING

Just a command to show you how objs are compiled :
powerpc-linux-gnu-gcc -g  -Os   -fPIC -ffixed-r14 -meabi -D__KERNEL__
-DTEXT_BASE=0xFC000000  -I/a/good/path/to/include2 -I/a/good/path/to/include
-I/a/good/path/to/include -fno-builtin -ffreestanding -nostdinc
-isystem/usr/freescale-gcc-4.2.3/bin/../lib/gcc/powerpc-linux-gnu/4.2.3/include
-pipe  -DCONFIG_PPC -D__powerpc__ -DCONFIG_8260 -DCONFIG_CPM2 -ffixed-r2
-ffixed-r29 -mstring -mcpu=603e -mmultiple -Wall -Wstrict-prototypes -c -o
/a/good/path/to/common/cmd_mac.o cmd_mac.c

And another command to see how u-boot is built :
powerpc-linux-gnu-ld -Bstatic -T /a/good/path/to/a/u-boot.lds -Ttext
0xFC000000  -n $UNDEF_SYM cpu/mpc8260/start.o \
                        --start-group lib_generic/libgeneric.a
board/rmp100/librmp100.a cpu/mpc8260/libmpc8260.a lib_ppc/libppc.a
fs/cramfs/libcramfs.a fs/fat/libfat.a fs/fdos/libfdos.a fs/jffs2/libjffs2.a
fs/reiserfs/libreiserfs.a fs/ext2/libext2fs.a net/libnet.a disk/libdisk.a
rtc/librtc.a dtt/libdtt.a drivers/libdrivers.a drivers/nand/libnand.a
drivers/nand_legacy/libnand_legacy.a drivers/sk98lin/libsk98lin.a
post/libpost.a post/cpu/libcpu.a common/libcommon.a --end-group -L
/usr/freescale-gcc-4.2.3/bin/../lib/gcc/powerpc-linux-gnu/4.2.3 -lgcc \
                        -Map u-boot.map -o u-boot

If I do it with .a files compiled with gcc3 and after I do objcopy it works
but if I do it with .a files compiled with gcc4 it freezes.

NB :
- with gcc3, u-boot.bin has a size of 121KiB
- UNDEF_SYM=
-u__u_boot_cmd_autoscr -u__u_boot_cmd_bootm -u__u_boot_cmd_diskboot
-u__u_boot_cmd_end -u__u_boot_cmd_go -u__u_boot_cmd_help -u__u_boot_cmd_ide
-u__u_boot_cmd_printenv -u__u_boot_cmd_question_mark -u__u_boot_cmd_reset
-u__u_boot_cmd_setenv -u__u_boot_cmd_start -u__u_boot_cmd_version
- I know u-boot 1.1.6 is an older version but I have to use it not another

Thanks a lot for your attention and your futurs ideas...

Val.
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[U-Boot-Users] trouble to build u-boot.bin with objcopy

[Jerry Van Baren]

valerian NA wrote:
> Hi all,
> 
> I work with a linux cross-compiler (codesourcery with gcc 4.2.3) for 
> embedded powerpc targets (mpc8248).
> So I tried to compile u-boot (version 1.1.6). It works fine with another 
> and older version of gcc (3.3.2) but with the new cross-compiler (4.2.3) 
> I have trouble to do this part :
> powerpc-linux-gnu-objcopy --gap-fill 0xff -O binary u-boot u-boot.bin
> 
> This command freezes and uses a lot of memory without sucess (maybe I 
> have not enough disk space).

Symptom of an inadvertent *large* gap in your "LOAD" sections.

> I decided to launch without "--gap-fill" to see the reaction :
> powerpc-linux-gnu-objcopy -O binary u-boot u-boot.bin
> It creates u-boot.bin file, and the system (host ls -al) tells that this 
> file has a size nearest to 4GiB
> 
> So I think it's a problem in the mapping of u-boot :
> powerpc-linux-gnu-objdump -h u-boot
> 
> u-boot:     file format elf32-powerpc
> 
> Sections:
> Idx Name          Size      VMA       LMA       File off  Algn
>   0 .text         00017e18  fc000000  fc000000  00002138  2**2
>                   CONTENTS, ALLOC, LOAD, READONLY, CODE
>   1 .reloc        00000804  fc018000  fc018000  0001a138  2**0
>                   CONTENTS, ALLOC, LOAD, DATA
>   2 .data         00001060  fc018804  fc018804  0001a93c  2**2
>                   CONTENTS, ALLOC, LOAD, DATA
>   3 .data.rel.ro.local 0000003c  fc019864  fc019864  0001b99c  2**2
>                   CONTENTS, ALLOC, LOAD, DATA
>   4 .data.rel     0000003c  fc0198a0  fc0198a0  0001b9d8  2**2
>                   CONTENTS, ALLOC, LOAD, DATA
>   5 .data.rel.local 00000634  fc0198dc  fc0198dc  0001ba14  2**2
>                   CONTENTS, ALLOC, LOAD, DATA
>   6 .ppcenv       00000200  fc019f10  fc019f10  0001c048  2**2
>                   CONTENTS, ALLOC, LOAD, DATA
>   7 .u_boot_cmd   000000dc  fc01a110  fc01a110  0001c248  2**2
>                   CONTENTS, ALLOC, LOAD, DATA
>   8 .bss          00001bf8  fc01b000  fc01b000  0001d138  2**3
>                   ALLOC

[snip]

>  13 .rodata.str1.1 0000209e  00000660  00000660  00000094  2**0
>                   CONTENTS, ALLOC, LOAD, READONLY, DATA

What is .rodata.str1.1?  Is it new to gcc 4.2.3?  It is being located at 
the start of memory where all the rest of your "LOAD" sections are at 
the end of memory.  The result: 4GB binary images.  You need to locate 
this is a better location (close to the rest of the "LOAD" sections).

[snip]

> Thanks a lot for your attention and your futurs ideas...
> 
> Val.

HTH,
gvb