ChangeLog:

	* target.h (enum strata): New value arch_stratum.
	* target.c (target_require_runnable): Skip arch_stratum targets.

	* configure.tgt (powerpc-*-linux* | powerpc64-*-linux*): Add
	solib-spu.o and spu-multiarch.o to gdb_target_obs.
	* Makefile.in (ALL_TARGET_OBS): Add solib-spu.o and spu-multiarch.o.
	(ALLDEPFILES): Add solib-spu.c and spu-multiarch.c.

	* solib-spu.c: New file.
	* solib-spu.h: New file.
	* spu-multiarch.c: New file.

	* spu-tdep.h (SPUADDR, SPUADDR_SPU, SPUADDR_ADDR): New macros.

	* spu-tdep.c (struct gdbarch_tdep): New member id.
	(spu_gdbarch_id): New function.
	(spu_lslr): New function.

	(spu_address_to_pointer): New function.
	(spu_pointer_to_address): Support SPU ID address encoding.  Use
	spu_gdbarch_id and spu_lslr.
	(spu_integer_to_address): Likewise.
	(spu_frame_unwind_cache): Update for encoded addresses.
	(spu_unwind_pc, spu_unwind_sp): Likewise.
	(spu_read_pc, spu_write_pc): Likewise.
	(spu_push_dummy_call): Likewise.
	(spu_software_single_step): Likewise.
	(spu_get_longjmp_target): Likewise.
	(spu_overlay_update_osect): Likewise.

	(spu_dis_asm_print_address): New function.
	(gdb_print_insn_spu): Likewise.

	(spu_gdbarch_init): Store SPU ID in tdep structure.
	Install spu_address_to_pointer and gdb_print_insn_spu.

	* ppc-linux-tdep.c: Include "observer.h", "auxv.h", "elf/common.h"
	and "solib-spu.h".
	(ppc_linux_entry_point_addr): New static variable.
	(ppc_linux_inferior_created): New function.
	(ppc_linux_displaced_step_location): Likewise.
	(ppc_linux_init_abi): Enable Cell/B.E. support if supported
	by the target.
	(_initialize_ppc_linux_tdep): Attach to inferior_created observer.

	* NEWS: Mention multi-architecture and Cell/B.E. debugging
	capabilities.

testsuite/ChangeLog:

	* gdb.xml/tdesc-regs.exp: Skip for SPU targets.

1 files changed, 60 insertions, 0 deletions

diff --git a/gdb/ppc-linux-tdep.c b/gdb/ppc-linux-tdep.c
index a15d28386ac..1aaac0bd45a 100644
--- a/gdb/ppc-linux-tdep.c
+++ b/gdb/ppc-linux-tdep.c
@@ -33,11 +33,15 @@
 #include "osabi.h"
 #include "regset.h"
 #include "solib-svr4.h"
+#include "solib-spu.h"
 #include "ppc-tdep.h"
 #include "ppc-linux-tdep.h"
 #include "trad-frame.h"
 #include "frame-unwind.h"
 #include "tramp-frame.h"
+#include "observer.h"
+#include "auxv.h"
+#include "elf/common.h"
 
 #include "features/rs6000/powerpc-32l.c"
 #include "features/rs6000/powerpc-altivec32l.c"
@@ -1003,6 +1007,46 @@ static struct tramp_frame ppc64_linux_sighandler_tramp_frame = {
 };
 
 
+/* Address to use for displaced stepping.  When debugging a stand-alone
+   SPU executable, entry_point_address () will point to an SPU local-store
+   address and is thus not usable as displaced stepping location.  We use
+   the auxiliary vector to determine the PowerPC-side entry point address
+   instead.  */
+
+static CORE_ADDR ppc_linux_entry_point_addr = 0;
+
+static void
+ppc_linux_inferior_created (struct target_ops *target, int from_tty)
+{
+  ppc_linux_entry_point_addr = 0;
+}
+
+static CORE_ADDR
+ppc_linux_displaced_step_location (struct gdbarch *gdbarch)
+{
+  if (ppc_linux_entry_point_addr == 0)
+    {
+      CORE_ADDR addr;
+
+      /* Determine entry point from target auxiliary vector.  */
+      if (target_auxv_search (&current_target, AT_ENTRY, &addr) <= 0)
+	error (_("Cannot find AT_ENTRY auxiliary vector entry."));
+
+      /* Make certain that the address points at real code, and not a
+	 function descriptor.  */
+      addr = gdbarch_convert_from_func_ptr_addr (gdbarch, addr,
+						 &current_target);
+
+      /* Inferior calls also use the entry point as a breakpoint location.
+	 We don't want displaced stepping to interfere with those
+	 breakpoints, so leave space.  */
+      ppc_linux_entry_point_addr = addr + 2 * PPC_INSN_SIZE;
+    }
+
+  return ppc_linux_entry_point_addr;
+}
+
+
 /* Return 1 if PPC_ORIG_R3_REGNUM and PPC_TRAP_REGNUM are usable.  */
 int
 ppc_linux_trap_reg_p (struct gdbarch *gdbarch)
@@ -1189,6 +1233,19 @@ ppc_linux_init_abi (struct gdbarch_info info,
 				   PPC_TRAP_REGNUM, "trap");
 	}
     }
+
+  /* Enable Cell/B.E. if supported by the target.  */
+  if (tdesc_compatible_p (info.target_desc,
+			  bfd_lookup_arch (bfd_arch_spu, bfd_mach_spu)))
+    {
+      /* Cell/B.E. multi-architecture support.  */
+      set_spu_solib_ops (gdbarch);
+
+      /* The default displaced_step_at_entry_point doesn't work for
+	 SPU stand-alone executables.  */
+      set_gdbarch_displaced_step_location (gdbarch,
+					   ppc_linux_displaced_step_location);
+    }
 }
 
 /* Provide a prototype to silence -Wmissing-prototypes.  */
@@ -1206,6 +1263,9 @@ _initialize_ppc_linux_tdep (void)
   gdbarch_register_osabi (bfd_arch_rs6000, bfd_mach_rs6k, GDB_OSABI_LINUX,
                          ppc_linux_init_abi);
 
+  /* Attach to inferior_created observer.  */
+  observer_attach_inferior_created (ppc_linux_inferior_created);
+
   /* Initialize the Linux target descriptions.  */
   initialize_tdesc_powerpc_32l ();
   initialize_tdesc_powerpc_altivec32l ();