porting gnu prolog

Hi all,

Been having problems porting to Linux/SPARC with MAP_REG_BANK defined, and
it looks like %g6 is used without it ever being initialized when pl2wam
calls Reset_Prolog().

I dug through the x86 disassembly from the backtraces, and as far as I
can see, it doesn't initialize %ebx to MAP_REG_BANK, either.  It just
always happens to have an address of a segment mapped rwxp in the
/proc/pid/maps file there, if I put a breakpoint into main and examine
the registers and the maps file:

ebx            0x40157e48       1075150408
40153000-40159000 rwxp 00113000 03:03 374175     /lib/libc-2.2.5.so

On the SPARC, though:
g6             0xff000000       -16777216

Am I missing something?

-- DN
Daniel