Strange assembler warning

[Olivier Houchard]

On Sun, Jan 07, 2007 at 10:02:13PM +0100, Bernd Walter wrote:
> I was trying to build Hans Petter's USB stack:
> cc -c -O2 -pipe -fno-strict-aliasing -mcpu=arm9 -std=c99  -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes  -Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual  -Wundef -fformat-extensions -nostdinc -I-  -I. -I../../.. -I../../../contrib/altq -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h -fno-common -finline-limit=8000 --param inline-unit-growth=100 --param large-function-growth=1000 -mcpu=arm9 -ffreestanding -Werror  ../../../dev/usb/ohci.c
> ../../../dev/usb/ohci.c:120:1: "PHYSADDR" redefined
> In file included from <command line>:5:
> ./opt_global.h:3:1: this is the location of the previous definition
> {standard input}: Assembler messages:
> {standard input}:6052: Warning: source register same as write-back base
> *** Error code 1
> 
> Stop in /usr/src/sys/arm/compile/FBOX.
> 98.000u 3.000s 2:01.33 83.8%    37057+84655k 1+12io 2pf+0w
> Exit 1
> [86]arm9# 
> 
> Ok - the PHYADDR is a name collision with the kernel load address.
> After removing the clash it compiles.
> But the assembler warning remains.
> 

Hi Bernd,

Could you put the assembler file, as provided my cc -S, and ohci.c somewhere
online ? This typically happens with gcc allocating the wrong registers with
inline asm, so we need to figure out which code is at fault, and try to fix it
or work around the problem.

Thanks !

Olivier