2013-02-01 Andreas Tobler <andreast@fgznet.ch>

	* Makefile.in (ALL_TARGET_OBS): Add ppc64-tdep.o.
	(HFILES_NO_SRCDIR): Add ppc64-tdep.h.
	(ALLDEPFILES): Add ppc64-tdep.c.
	* configure.tgt (powerpc-*-linux* | powerpc64-*-linux*): Add
	ppc64-tdep.o to gdb_target_obs.
	* ppc64-tdep.h: New file.
	* ppc64-tdep.c: New file.
	(insn_d, insn_ds, insn_xfx, ppc64_desc_entry_point): Move from
	ppc-linux-tdep.c to here.
	(PPC64_STANDARD_LINKAGE1_LEN, PPC64_STANDARD_LINKAGE2_LEN)
	(PPC64_STANDARD_LINKAGE2_LEN): Likewise and use ARRAY_SIZE macro.
	(ppc64_standard_linkage1_target, ppc64_standard_linkage2_target)
	(ppc64_standard_linkage3_target, ppc64_skip_trampoline_code): Move
	from ppc-linux-tdep.c to here.
	(ppc64_convert_from_func_ptr_addr): Rename from
	ppc64_linux_convert_from_func_ptr_addr to
	ppc64_convert_from_func_ptr_addr and move from ppc-linux-tdep.c to
	here.
	* rs6000-tdep.c:
	(read_insn): Move from ppc-linux-tdep.c to here.
	(insns_match_pattern, insn_d_field, insn_ds_field): Move
	from ppc-linux-tdep.c to here and rename them with the ppc_ prefix.
	* ppc-linux-tdep.c: Include ppc64-tdep.h.
	Removed above functions.
	(ppc_linux_init_abi): Adjust.

1 files changed, 62 insertions, 0 deletions

diff --git a/gdb/rs6000-tdep.c b/gdb/rs6000-tdep.c
index a15f757072d..5bc11055dca 100644
--- a/gdb/rs6000-tdep.c
+++ b/gdb/rs6000-tdep.c
@@ -4238,6 +4238,68 @@ show_powerpc_exact_watchpoints (struct ui_file *file, int from_tty,
   fprintf_filtered (file, _("Use of exact watchpoints is %s.\n"), value);
 }
 
+/* Read a PPC instruction from memory.  PPC instructions are always
+   big-endian, no matter what endianness the program is running in, so
+   we can hardcode BFD_ENDIAN_BIG for read_memory_unsigned_integer.  */
+
+static unsigned int
+read_insn (CORE_ADDR pc)
+{
+  return read_memory_unsigned_integer (pc, 4, BFD_ENDIAN_BIG);
+}
+
+/* Return non-zero if the instructions at PC match the series
+   described in PATTERN, or zero otherwise.  PATTERN is an array of
+   'struct ppc_insn_pattern' objects, terminated by an entry whose
+   mask is zero.
+
+   When the match is successful, fill INSN[i] with what PATTERN[i]
+   matched.  If PATTERN[i] is optional, and the instruction wasn't
+   present, set INSN[i] to 0 (which is not a valid PPC instruction).
+   INSN should have as many elements as PATTERN.  Note that, if
+   PATTERN contains optional instructions which aren't present in
+   memory, then INSN will have holes, so INSN[i] isn't necessarily the
+   i'th instruction in memory.  */
+
+int
+ppc_insns_match_pattern (CORE_ADDR pc, struct ppc_insn_pattern *pattern,
+			 unsigned int *insn)
+{
+  int i;
+
+  for (i = 0; pattern[i].mask; i++)
+    {
+      insn[i] = read_insn (pc);
+      if ((insn[i] & pattern[i].mask) == pattern[i].data)
+	pc += 4;
+      else if (pattern[i].optional)
+	insn[i] = 0;
+      else
+	return 0;
+    }
+
+  return 1;
+}
+
+/* Return the 'd' field of the d-form instruction INSN, properly
+   sign-extended.  */
+
+CORE_ADDR
+ppc_insn_d_field (unsigned int insn)
+{
+  return ((((CORE_ADDR) insn & 0xffff) ^ 0x8000) - 0x8000);
+}
+
+/* Return the 'ds' field of the ds-form instruction INSN, with the two
+   zero bits concatenated at the right, and properly
+   sign-extended.  */
+
+CORE_ADDR
+ppc_insn_ds_field (unsigned int insn)
+{
+  return ((((CORE_ADDR) insn & 0xfffc) ^ 0x8000) - 0x8000);
+}
+
 /* Initialization code.  */
 
 /* -Wmissing-prototypes */