Solaris 8 64-bit C compilation fails to add .register declaration

[Nicolas Williams <Nicolas dot Williams at wdr dot com>]

When making GCC 2.95.2 on a Solaris 8 64-bit UltraSPARC system, wether
using Sun Workshop 5.0 for the initial compilation or a 32-bit GCC the
make fails when xgcc is used. The problem appears to be a the lack of
emission of a ".register" pseudo assembly instruction in xgcc's
assembler output.

I include the portion of the make where the error can be see as well as
a snippet from a Sun WORKSHOP 5.0 README that refers to the need for
this .register pseudo-instruction.

I believe this non-emission constitutes a bug.

I found instructions for building a 64-bit-capable GCC for Solaris 8 on
UltraSPARCs by doing a "Quick Search" on http://www.deja.com for
"Solaris 64 bit gcc" and finding a three-post thread with subject
"Re: 64-bit gcc?" in the comp.sys.sun.apps newsgroup.

(http://www.deja.com/qs.xp?OP=dnquery.xp&ST=MS&DBS=2&QRY=Solaris+64+bit+gcc)

One of the posters' (Holger Burde <j03k@alf.zfn.uni-bremen.de>) web page,
http://home.t-online.de/home/hburde/, includes instructions for building
a 64-bit capable GCC for Solaris on UltraSPARC
(http://home.t-online.de/home/hburde/s7-tips.html#64bit).

I tried the approaches suggested in that thread and I also tried
building GCC with Sun's Workshop 5.0. The result was the same.

...
make[2]: Entering directory `/tmp/gcc-2.95.2/gcc'
rm -f tmplibgcc2.a
for name in _muldi3 _divdi3 _moddi3 _udivdi3 _umoddi3 _negdi2 _lshrdi3 _ashldi3 _ashrdi3 _ffsdi2 _udiv_w_sdiv _udivmoddi4 _cmpdi2 _ucmpdi2 _floatdidf _floatdisf _fixunsdfsi _fixunssfsi _fixunsdfdi _fixdfdi _fixunssfdi _fixsfdi _fixxfdi _fixunsxfdi _floatdixf _fixunsxfsi _fixtfdi _fixunstfdi _floatditf __gcc_bcmp _varargs __dummy _eprintf _bb _shtab _clear_cache _trampoline __main _exit _ctors _pure; \
do \
  echo ${name}; \
  /tmp/gcc-2.95.2/gcc/xgcc -B/tmp/gcc-2.95.2/gcc/ -B/usr/local/gnu32/sparcv9-sun-solaris2.8/bin/ -I/usr/local/gnu32/sparcv9-sun-solaris2.8/include -O2   -DIN_GCC -DHAIFA  -DSVR4  -O -I./include  -fPIC -g1 -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED    -I. -I. -I./config -I./../include -c -DL${name} \
       ./libgcc2.c -o ${name}.o; \
  if [ $? -eq 0 ] ; then true; else exit 1; fi; \
  ar rc tmplibgcc2.a ${name}.o; \
  rm -f ${name}.o; \
done
_muldi3
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 274: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 274: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 275: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 275: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 310: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 310: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 312: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 312: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 312: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 312: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 316: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 318: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 319: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 319: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 319: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 319: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 320: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 320: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 321: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 321: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 322: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 324: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 324: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 325: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 325: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 326: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 326: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 329: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 329: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 330: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 330: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 330: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 331: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 331: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 331: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 331: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 332: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 332: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 332: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 332: error: detect global register use not covered .register pseudo-op
/usr/ccs/bin/as: "/var/tmp/ccK8bxnl.s", line 334: error: detect global register use not covered .register pseudo-op
make[3]: *** [libgcc2.a] Error 1
make[3]: Leaving directory `/tmp/gcc-2.95.2/gcc'
make[2]: *** [stmp-multilib-sub] Error 2
make[2]: Leaving directory `/tmp/gcc-2.95.2/gcc'
make[1]: *** [stmp-multilib] Error 1
make[1]: Leaving directory `/tmp/gcc-2.95.2/gcc'
make: *** [all-gcc] Error 2


From the Sun Workshop 5.0 READMEs/64bit_Compilers file:

"
   There is one undocumented pseudo instruction that is important for those
   porting assembly language code to SPARC-V9:

       .register %g{2|3|6|7}, {#scratch|symbol_name}

   With SPARC-V9, the four registers %g2, %g3, %g6, %g7, should not be used
   unless explicitly declared on a .register pseudo-op. Under -xarch=v9, the
   SPARC assembler will issue an error message if it detects the use of %g2 or
   %g3 registers without a .register declaration. A .register declaration is
   not required for %g6 or %g7, but its appearance does invoke checking for 
   proper use of these registers.

   Specify the #scratch option when the register is used as a scratch register.

        .register %g3, #scratch
 
   Or, declare the global register with a symbolic name, as in:

        .register %g2, xyz

   A .register declaration must appear before the first use of the register.
   Linking objects containing conflicting register will cause the linker to
   issue error messages.
"

Nico

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