Re: Porting NetBSD to the GameCube

[Stéphane Witzmann <stephane.witzmann%gmail.com@localhost>]

Water NB wrote:

> On Fri, Nov 11, 2005 at 12:05:04PM +0100, St?phane Witzmann wrote:
>> Hello
>> 
>> I'm trying to port NetBSD to the GameCube (but don't expect something big
>> right now). So far, I have gathered code from other ppc architectures,
>> removed all the I could from it, and made a minimalistic kernel config
>> file. So I've got something that builds. Now I'm trying to set the entry
>> point to 0x80003100, but the building fails. Some help would be very
>> appreciated. Below are the details :
>> 
>> #      link  TEST/netbsd
>> /home/durandil/NetBSD/gcdev/cross//tools/bin/powerpc--netbsd-ld -N -Ttext
>> 0x80003100 -e __start -X -o netbsd ${SYSTEM_OBJ} ${EXTRA_OBJ} vers.o
>> locore.o(.text+0x414): In function `trapcode':
>> : relocation truncated to fit: R_PPC_ADDR24 s_trap
>> locore.o(.text+0x454): In function `alitrap':
>> : relocation truncated to fit: R_PPC_ADDR24 s_trap
>> locore.o(.text+0x4fc): In function `dsitrap':
>> : relocation truncated to fit: R_PPC_ADDR24 disitrap
>> locore.o(.text+0x5a4): In function `dsi601trap':
>> : relocation truncated to fit: R_PPC_ADDR24 disitrap
>> locore.o(.text+0x5e4): In function `extint':
>> : relocation truncated to fit: R_PPC_ADDR24 extintr
>> locore.o(.text+0x624): In function `decrint':
>> : relocation truncated to fit: R_PPC_ADDR24 decrintr
>> locore.o(.text+0x8a0): In function `ddblow':
>> : relocation truncated to fit: R_PPC_ADDR24 u_trap
>> locore.o(.text+0x8c4): In function `ddblow':
>> : relocation truncated to fit: R_PPC_ADDR24 ddbtrap
>> locore.o(.text+0xcfc): In function `sctrap':
>> : relocation truncated to fit: R_PPC_ADDR24 s_sctrap
>> 
>> #       $NetBSD: std.gamecube $
>> #
>> # standard, required NetBSD/gamecube 'options'
>> 
>> machine         gamecube powerpc
>> 
>> options         PPC_OEA         # Support Motorola PPC60x CPUs
>> makeoptions     PPCDIR="oea"    # Tell Makefile.powerpc what dir to use
>> 
>> options         EXEC_ELF32      # exec ELF binaries
>> options         EXEC_SCRIPT     # exec #! scripts
>> 
>> options         INTSTK=0x2000
>> 
>> makeoptions     TEXTADDR=0x80003100
>> 
>> See http://www.gcdev.com/download/yet_another_gamecube_doc.html.tar.gz
>> for technical information on the GameCube.
>> Thanks.
>> 
>> Stéphane Witzmann
>> 
>> 
>> 
>> 
> It seems that is a problem of long-jump.
> short-jump of PowerPC is in a range of only 32M (25 bit)
> You can try CC option -mlong-calls

Added: makeoptions      CFLAGS="-mlong-calls"

Building fails as follows :
#    create  TEST/assym.h
cat /home/durandil/NetBSD/gcdev/src/sys/arch/powerpc/oea/genassym.cf  | 
sh /home/durandil/NetBSD/gcdev/src/sys/kern/genassym.sh 
/home/durandil/NetBSD/gcdev/cross//tools/bin/powerpc--netbsd-gcc
-mlong-calls -msoft-float      -ffreestanding  -g -O2 -Wreturn-type -Werror
-Wall -Wno-main -Wno-format-zero-length -Wpointer-arith
-Wmissing-prototypes -Wstrict-prototypes -Wno-sign-compare
-fno-zero-initialized-in-bss  -Dgamecube=gamecube -I. 
-I/home/durandil/NetBSD/gcdev/src/sys/arch
-I/home/durandil/NetBSD/gcdev/src/sys -nostdinc -DDIAGNOSTIC -DDEBUG
-DMAXUSERS=8 -D_KERNEL -D_KERNEL_OPT   > assym.h.tmp &&  mv -f assym.h.tmp
assym.h
cc1: error: invalid option `long-calls'

Looking at "man gcc", there is no -mlong-calls option :

RS/6000 and PowerPC Options -mcpu=cpu-type -mtune=cpu-type -mpower
-mno-power  -mpower2  -mno-power2 -mpowerpc  -mpowerpc64  -mno-pow-
erpc -maltivec  -mno-altivec -mpowerpc-gpopt  -mno-powerpc-gpopt
-mpowerpc-gfxopt  -mno-powerpc-gfxopt -mnew-mnemonics
-mold-mnemonics -mfull-toc   -mminimal-toc  -mno-fp-in-toc
-mno-sum-in-toc -m64  -m32  -mxl-call  -mno-xl-call  -mpe
-msoft-float  -mhard-float  -mmultiple  -mno-multiple -mstring
-mno-string  -mupdate  -mno-update -mfused-madd  -mno-fused-madd
-mbit-align  -mno-bit-align -mstrict-align  -mno-strict-align
-mrelocatable -mno-relocatable  -mrelocatable-lib  -mno-relocat-
able-lib -mtoc  -mno-toc  -mlittle  -mlittle-endian  -mbig
-mbig-endian -mcall-aix  -mcall-sysv  -mcall-netbsd
-maix-struct-return  -msvr4-struct-return -mabi=altivec
-mabi=no-altivec -mabi=spe  -mabi=no-spe -misel=yes  -misel=no
-mprototype  -mno-prototype -msim  -mmvme  -mads  -myellowknife
-memb  -msdata -msdata=opt  -mvxworks  -mwindiss  -G num  -pthread

Did I miss something ?

S.W.