[Qemu-devel] Building OpenHackWare (qemu-system-ppc firmware)

[Ed Swierk]

I'm having trouble building OpenHackWare (the firmware for qemu-system-ppc) 
from source on a PPC machine running Fedora 6, using either gcc 4.1.1 or gcc 
3.4.6. I'm using the source tarball 
http://perso.magic.fr/l_indien/OpenHackWare/0.4/OpenHackWare-0.4.1.tar.bz2, 
with the patch pc-bios/ohw.diff from qemu-snapshot-2007-02-09_05.tar.bz2.

The code compiles just fine (although gcc 4.1.1 generates a lot of warnings), 
but fails to link:

ld -O2 -g -nostdlib -T 
src/main.ld -o .objs/main.out .objs/main.o .objs/bootinfos.o .objs/bloc.o 
.objs/pci.o .objs/of.
\
o .objs/start.o .objs/nvram.o .objs/vga.o .objs/mm.o .objs/char.o 
.objs/malloc.o .objs/errno.o .objs/_vprintf.o .objs/\
printf.o .objs/sprintf.o .objs/snprintf.o .objs/vprintf.o .objs/vsprintf.o 
.objs/vsnprintf.o .objs/dprintf.o .objs/vdp\
rintf.o .objs/memcpy.o .objs/memccpy.o .objs/mempcpy.o .objs/memmove.o 
.objs/memcmove.o .objs/mempmove.o .objs/memset.
\
o .objs/memcmp.o .objs/memchr.o .objs/rawmemchr.o .objs/memrchr.o 
.objs/memmem.o .objs/strcpy.o .objs/strdup.o .objs/s\
trndup.o .objs/stpcpy.o .objs/stpncpy.o .objs/strcat.o .objs/strncat.o 
.objs/strcmp.o .objs/strcasecmp.o .objs/strncmp\
.o .objs/strncasecmp.o .objs/strchr.o .objs/strchrnul.o .objs/strrchr.o 
.objs/basename.o .objs/dirname.o .objs/strlen.
\
o .objs/strnlen.o .objs/exec_core.o .objs/exec_elf.o .objs/exec_xcoff.o 
.objs/exec_macho.o .objs/exec_chrp.o .objs/exe\
c_prep.o .objs/exec_pef.o .objs/fs_core.o .objs/fs_raw.o .objs/fs_ext2.o 
.objs/fs_isofs.o .objs/fs_hfs.o .objs/part_co\
re.o .objs/part_apple.o .objs/part_isofs.o .objs/part_prep.o 
.objs/dev_char_pckbd.o .objs/dev_char_kbdadb.o .objs/dev_\
char_kbd.o
ld: region start is full (.objs/main.out section .rodata.str1.4)
ld: region start is full (.objs/main.out section .rodata.str1.4)
ld: section .text [0000000005800400 -> 0000000005813767] overlaps 
section .rodata.str1.4 [0000000005800054 -> 00000000\
05804683]
ld: .objs/main.out: section .text lma 0x5800400 overlaps previous sections
ld: .objs/main.out: section .OpenFirmware lma 0x5813768 overlaps previous 
sections
ld: .objs/main.out: section .data lma 0x581946c overlaps previous sections
ld: .objs/main.out: section .OpenFirmware_vars lma 0x582053c overlaps previous 
sections
ld: .objs/main.out: section .sdata lma 0x5821a4c overlaps previous sections
ld: .objs/main.out: section .rodata lma 0x5821a5c overlaps previous sections
ld: .objs/main.out: section .RTAS lma 0x5822654 overlaps previous sections
ld: .objs/main.out: section .RTAS_vars lma 0x5823c10 overlaps previous 
sections
make: *** [.objs/main.out] Error 1

I thought debug symbols might be making the code too big, but the same error 
occurs when compiling without -g. The only thing that seems to work is 
increasing the length of the start section in main.ld, and moving the bios 
section's origin to compensate. Unfortunately the resulting binary hangs; the 
OS presumably relies on the bios origin being 0x05800400.

Any hints would be appreciated.

--Ed