Hi folks,
I'm currently porting U-Boot 1.0.0 to a NetSilicon NS9750 (ARM926EJS core). This port is partly derived from board/omap1610inn. The compiler is gcc-3.3.2, taken from the uClibc toolchain.
For my target the compiler is using his internal libgcc.a:__div0 routine which of course fails (it's an SWI instruction). But compiling U-Boot for an smdk2410 platform with the same compiler uses the correct U-Boot's own __div0 code. I can't see any relevant differences in both build lines.
Can anyone help me? And is it really necessary to include libgcc.a?
The build line for the NS9750: ======================== UNDEF_SYM=`arm-linux-objdump -x board/ns9750dev/libns9750dev.a cpu/arm926ejs/libarm926ejs.a lib_arm/libarm.a fs/jffs2/libjffs2.a fs/fdos/libfdos.a fs/fat/libfat.a net/libnet.a disk/libdisk.a rtc/librtc.a dtt/libdtt.a drivers/libdrivers.a drivers/sk98lin/libsk98lin.a post/libpost.a post/cpu/libcpu.a common/libcommon.a lib_generic/libgeneric.a |sed -n -e 's/.*(__u_boot_cmd_.*)/-u\1/p'|sort|uniq`;\ arm-linux-ld -Bstatic -T /targets/ewp/LxMOD/build/apps/u-boot-1.0.0/board/ns9750dev/u-boot.lds -Ttext 0x00F80000 $UNDEF_SYM cpu/arm926ejs/start.o \ --start-group board/ns9750dev/libns9750dev.a cpu/arm926ejs/libarm926ejs.a lib_arm/libarm.a fs/jffs2/libjffs2.a fs/fdos/libfdos.a fs/fat/libfat.a net/libnet.a disk/libdisk.a rtc/librtc.a dtt/libdtt.a drivers/libdrivers.a drivers/sk98lin/libsk98lin.a post/libpost.a post/cpu/libcpu.a common/libcommon.a lib_generic/libgeneric.a -L /usr/local/LxNETES-3/arm-linux/lib/gcc-lib/arm-linux/3.3.2 -lgcc --end-group \ -Map u-boot.map -o u-boot ========================
The relevant entry in u-boot.map for __div0:
=========================== /usr/local/LxNETES-3/arm-linux/lib/gcc-lib/arm-linux/3.3.2/libgcc.a(_udivsi3.o) drivers/libdrivers.a(serial_ns9750.o) (__udivsi3) / Compilation ============================
The build line for SMDK2410
=======================- UNDEF_SYM=`arm-linux-objdump -x board/smdk2410/libsmdk2410.a cpu/arm920t/libarm920t.a lib_arm/libarm.a fs/jffs2/libjffs2.a fs/fdos/libfdos.a fs/fat/libfat.a net/libnet.a disk/libdisk.a rtc/librtc.a dtt/libdtt.a drivers/libdrivers.a drivers/sk98lin/libsk98lin.a post/libpost.a post/cpu/libcpu.a common/libcommon.a lib_generic/libgeneric.a |sed -n -e 's/.*(__u_boot_cmd_.*)/-u\1/p'|sort|uniq`;\ arm-linux-ld -Bstatic -T /targets/ewp/LxMOD/build/apps/u-boot.smdk/board/smdk2410/u-boot.lds -Ttext 0x33F80000 $UNDEF_SYM cpu/arm920t/start.o \ --start-group board/smdk2410/libsmdk2410.a cpu/arm920t/libarm920t.a lib_arm/libarm.a fs/jffs2/libjffs2.a fs/fdos/libfdos.a fs/fat/libfat.a net/libnet.a disk/libdisk.a rtc/librtc.a dtt/libdtt.a drivers/libdrivers.a drivers/sk98lin/libsk98lin.a post/libpost.a post/cpu/libcpu.a common/libcommon.a lib_generic/libgeneric.a -L /usr/local/LxNETES-3/arm-linux/lib/gcc-lib/arm-linux/3.3.2 -lgcc --end-group \ -Map u-boot.map -o u-boot ===================
The relevant entry in u-boot.map for __div0:
==================== lib_arm/libarm.a(_udivsi3.o) cpu/arm920t/libarm920t.a(speed.o) (__udivsi3)