Allow PPC users to select which PPC/RS6000 variant they're debugging

at run-time.  At the moment, the only thing this affects is the
set of registers visible.
* config/rs6000/tm-rs6000.h (REGISTER_NAME): Define this as a call
to the function rs6000_register_name.
(rs6000_register_name): Include extern decl.
(NUM_REGS): Bump to 183.  What's the right way to do this?
(FIRST_UISA_SP_REGNUM, LAST_UISA_SP_REGNUM): Renamed from
FIRST_SP_REGNUM, LAST_SP_REGNUM.
(REGISTER_BYTES): Recompute this.
* rs6000-tdep.c: Renamed all uses of FIRST_SP_REGNUM and
LAST_SP_REGNUM to FIRST_UISA_SP_REGNUM and LAST_UISA_SP_REGNUM, with
some concomitant formatting changes.
#include "gdbcmd.h", so we can define commands here.
(struct variant): New structure.
(COMMON_UISA_REG_NAMES, PPC_UISA_SPR_NAMES, PPC_SEGMENT_REG_NAMES,
PPC_32_OEA_SPR_NAMES, num_registers): New macros.
(register_names_rs6000, register_names_uisa, register_names_403,
register_names_403GC, register_names_505, register_names_860,
register_names_601, register_names_602, register_names_603,
register_names_604, register_names_750, variants): New variables.
(rs6000_register_name, install_variant, find_variant_by_name,
install_variant_by_name, list_variants, show_current_variant,
set_processor, show_processor): New functions.
(_initialize_rs6000_tdep): Define new commands `set processor' and
`show processor', and call install_variant_by_name to set the
default variant.
* rs6000-nat.c: Renamed all uses of FIRST_SP_REGNUM and
LAST_SP_REGNUM to FIRST_UISA_SP_REGNUM and LAST_UISA_SP_REGNUM, with
some concomitant formatting changes.
* configure.in: Accept the `--with-cpu' flag, to specify a default
processor variant.
* acconfig.h: Provide a blurb for TARGET_CPU_DEFAULT, which is set
by configure's `--with-cpu' flag.
* config.in, configure: Regenerated.

1 files changed, 36 insertions, 0 deletions

diff --git a/gdb/configure.in b/gdb/configure.in
index be68643..c9c3a54 100644
--- a/gdb/configure.in
+++ b/gdb/configure.in
@@ -561,6 +561,42 @@ AC_SUBST(LIBIDE)
 AC_SUBST(IDE_DEPS)
 # end-sanitize-ide
 
+
+AC_ARG_WITH(cpu,
+[  --with-cpu=CPU          set the default CPU variant to debug],
+[case "${target}" in
+  powerpc-* | powerpcle-* )
+    ## It would be nice to keep this table in sync with the one in
+    ## gcc/configure.
+    case "${with_cpu}" in
+      ppc-uisa | rs6000 | 403 | 403GC | 505 | 860 | 601 | 602 | 603 \
+      | 604 | 750 )
+        ## Those are all handled in variants in rs6000-tdep.c, so they're fine.
+      ;;
+      common | power | power2 | rios | rios1 | rios2 | rsc | rsc1 ) 
+        ## These are all RS6000 variants, as far as GDB is concerned.
+        with_cpu=rs6000
+      ;;
+      603e | ec603e )
+        with_cpu=603
+      ;;
+      604e )
+	with_cpu=604
+      ;;
+      * )
+        AC_MSG_WARN(GDB: unknown --with-cpu value: \`${with_cpu}'; using \`ppc-uisa'.)
+	with_cpu=ppc-uisa
+      ;;
+    esac
+  ;;
+  * )
+    AC_MSG_WARN(GDB may ignore the --with-cpu flag for ${target} targets)
+  ;;
+esac
+AC_DEFINE_UNQUOTED(TARGET_CPU_DEFAULT, "${with_cpu}")
+],)
+
+
 ENABLE_GDBTK=
 
 AC_ARG_ENABLE(gdbtk,