Add Xtensa port

1 files changed, 526 insertions, 0 deletions

diff --git a/opcodes/xtensa-dis.c b/opcodes/xtensa-dis.c
new file mode 100644
index 0000000..bf5f5bf
--- /dev/null
+++ b/opcodes/xtensa-dis.c
@@ -0,0 +1,526 @@
+/* xtensa-dis.c.  Disassembly functions for Xtensa.
+   Copyright 2003 Free Software Foundation, Inc.
+   Contributed by Bob Wilson at Tensilica, Inc. (bwilson@tensilica.com)
+
+   This file is part of GDB, GAS, and the GNU binutils.
+
+   GDB, GAS, and the GNU binutils are free software; you can redistribute
+   them and/or modify them under the terms of the GNU General Public
+   License as published by the Free Software Foundation; either version 2,
+   or (at your option) any later version.
+
+   GDB, GAS, and the GNU binutils are distributed in the hope that they
+   will be useful, but WITHOUT ANY WARRANTY; without even the implied
+   warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+   the GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License along
+   with this file; see the file COPYING.  If not, write to the Free
+   Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+   USA.  */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <string.h>
+#include "xtensa-isa.h"
+#include "ansidecl.h"
+#include "sysdep.h"
+#include "dis-asm.h"
+
+#include <setjmp.h>
+
+#ifndef MAX
+#define MAX(a,b) (a > b ? a : b)
+#endif
+
+static char* state_names[256] =
+{
+  "lbeg", 		   	/* 0 */
+  "lend",  		   	/* 1 */
+  "lcount", 		   	/* 2 */
+  "sar",		   	/* 3 */
+  "br",			      	/* 4 */
+
+  "reserved_5",			/* 5 */
+  "reserved_6",			/* 6 */
+  "reserved_7",			/* 7 */
+
+  "av",				/* 8 */
+  "avh",		       	/* 9 */
+  "bv",				/* 10 */
+  "sav",			/* 11 */
+  "scompare1",		        /* 12 */
+
+  "reserved_13",	       	/* 13 */
+  "reserved_14",		/* 14 */
+  "reserved_15",		/* 15 */
+
+  "acclo",			/* 16 */
+  "acchi",			/* 17 */
+
+  "reserved_18",	        /* 18 */
+  "reserved_19",	       	/* 19 */
+  "reserved_20",		/* 20 */
+  "reserved_21",		/* 21 */
+  "reserved_22",	        /* 22 */
+  "reserved_23",	       	/* 23 */
+  "reserved_24",		/* 24 */
+  "reserved_25",		/* 25 */
+  "reserved_26",		/* 26 */
+  "reserved_27",		/* 27 */
+  "reserved_28",	        /* 28 */
+  "reserved_29",	       	/* 29 */
+  "reserved_30",		/* 30 */
+  "reserved_31",		/* 31 */
+
+  "mr0",			/* 32 */
+  "mr1", 			/* 33 */
+  "mr2",		      	/* 34 */
+  "mr3",			/* 35 */
+
+  "reserved_36",	        /* 36 */
+  "reserved_37",	       	/* 37 */
+  "reserved_38",		/* 38 */
+  "reserved_39",		/* 39 */
+  "reserved_40",	        /* 40 */
+  "reserved_41",	       	/* 41 */
+  "reserved_42",		/* 42 */
+  "reserved_43",		/* 43 */
+  "reserved_44",		/* 44 */
+  "reserved_45",		/* 45 */
+  "reserved_46",	        /* 46 */
+  "reserved_47",	       	/* 47 */
+  "reserved_48",		/* 48 */
+  "reserved_49",		/* 49 */
+  "reserved_50",	        /* 50 */
+  "reserved_51",	       	/* 51 */
+  "reserved_52",		/* 52 */
+  "reserved_53",		/* 53 */
+  "reserved_54",	        /* 54 */
+  "reserved_55",	       	/* 55 */
+  "reserved_56",		/* 56 */
+  "reserved_57",		/* 57 */
+  "reserved_58",		/* 58 */
+  "reserved_59",		/* 59 */
+  "reserved_60",	        /* 60 */
+  "reserved_61",	       	/* 61 */
+  "reserved_62",		/* 62 */
+  "reserved_63",		/* 63 */
+
+  "reserved_64",		/* 64 */
+  "reserved_65",		/* 65 */
+  "reserved_66",		/* 66 */
+  "reserved_67",		/* 67 */
+  "reserved_68",	        /* 68 */
+  "reserved_69",	       	/* 69 */
+  "reserved_70",		/* 70 */
+  "reserved_71",		/* 71 */
+
+  "wb",				/* 72 */
+  "ws",				/* 73 */
+
+  "reserved_74",		/* 74 */
+  "reserved_75",		/* 75 */
+  "reserved_76",	        /* 76 */
+  "reserved_77",	       	/* 77 */
+  "reserved_78",		/* 78 */
+  "reserved_79",		/* 79 */
+  "reserved_80",	        /* 80 */
+  "reserved_81",	       	/* 81 */
+  "reserved_82",		/* 82 */
+
+  "ptevaddr",			/* 83 */
+
+  "reserved_84",	        /* 84 */
+  "reserved_85",	       	/* 85 */
+  "reserved_86",		/* 86 */
+  "reserved_87",		/* 87 */
+  "reserved_88",		/* 88 */
+  "reserved_89",		/* 89 */
+
+  "rasid",		        /* 90 */
+  "itlbcfg",		       	/* 91 */
+  "dtlbcfg",			/* 92 */
+
+  "reserved_93",		/* 93 */
+  "reserved_94",		/* 94 */
+  "reserved_95",		/* 95 */
+
+  "ibreakenable",		/* 96 */
+
+  "reserved_97",		/* 97 */
+
+  "cacheattr",			/* 98 */
+
+  "reserved_99",		/* 99 */
+  "reserved_100",	       	/* 100 */
+  "reserved_101",	       	/* 101 */
+  "reserved_102",		/* 102 */
+  "reserved_103",		/* 103 */
+
+  "ddr",			/* 104 */
+
+  "reserved_105",		/* 105 */
+  "reserved_106",	        /* 106 */
+  "reserved_107",	       	/* 107 */
+  "reserved_108",		/* 108 */
+  "reserved_109",		/* 109 */
+  "reserved_110",	        /* 110 */
+  "reserved_111",	       	/* 111 */
+  "reserved_112",		/* 112 */
+  "reserved_113",		/* 113 */
+  "reserved_114",	        /* 114 */
+  "reserved_115",	       	/* 115 */
+  "reserved_116",		/* 116 */
+  "reserved_117",		/* 117 */
+  "reserved_118",		/* 118 */
+  "reserved_119",		/* 119 */
+  "reserved_120",	        /* 120 */
+  "reserved_121",	       	/* 121 */
+  "reserved_122",		/* 122 */
+  "reserved_123",		/* 123 */
+  "reserved_124",		/* 124 */
+  "reserved_125",		/* 125 */
+  "reserved_126",		/* 126 */
+  "reserved_127",		/* 127 */
+
+  "ibreaka0",			/* 128 */
+  "ibreaka1",			/* 129 */
+  "ibreaka2",			/* 130 */
+  "ibreaka3",			/* 131 */
+  "ibreaka4",			/* 132 */
+  "ibreaka5",			/* 133 */
+  "ibreaka6",			/* 134 */
+  "ibreaka7",			/* 135 */
+  "ibreaka8",			/* 136 */
+  "ibreaka9",			/* 137 */
+  "ibreaka10",       		/* 138 */
+  "ibreaka11",       		/* 139 */
+  "ibreaka12",       		/* 140 */
+  "ibreaka13",       		/* 141 */
+  "ibreaka14",       		/* 142 */
+  "ibreaka15",       		/* 143 */
+			   
+  "dbreaka0",			/* 144 */
+  "dbreaka1",			/* 145 */
+  "dbreaka2",			/* 146 */
+  "dbreaka3",			/* 147 */
+  "dbreaka4",			/* 148 */
+  "dbreaka5",			/* 149 */
+  "dbreaka6",			/* 150 */
+  "dbreaka7",			/* 151 */
+  "dbreaka8",			/* 152 */
+  "dbreaka9",			/* 153 */
+  "dbreaka10",       		/* 154 */
+  "dbreaka11",       		/* 155 */
+  "dbreaka12",       		/* 156 */
+  "dbreaka13",       		/* 157 */
+  "dbreaka14",       		/* 158 */
+  "dbreaka15",       		/* 159 */
+			   
+  "dbreakc0",			/* 160 */
+  "dbreakc1",			/* 161 */
+  "dbreakc2",			/* 162 */
+  "dbreakc3",			/* 163 */
+  "dbreakc4",			/* 164 */
+  "dbreakc5",			/* 165 */
+  "dbreakc6",			/* 166 */
+  "dbreakc7",			/* 167 */
+  "dbreakc8",			/* 168 */
+  "dbreakc9",			/* 169 */
+  "dbreakc10",       		/* 170 */
+  "dbreakc11",       		/* 171 */
+  "dbreakc12",       		/* 172 */
+  "dbreakc13",       		/* 173 */
+  "dbreakc14",       		/* 174 */
+  "dbreakc15",       		/* 175 */
+
+  "reserved_176",		/* 176 */
+
+  "epc1",			/* 177 */
+  "epc2",			/* 178 */
+  "epc3",			/* 179 */
+  "epc4",			/* 180 */
+  "epc5",			/* 181 */
+  "epc6",			/* 182 */
+  "epc7",			/* 183 */
+  "epc8",			/* 184 */
+  "epc9",			/* 185 */
+  "epc10",			/* 186 */
+  "epc11",			/* 187 */
+  "epc12",			/* 188 */
+  "epc13",			/* 189 */
+  "epc14",			/* 190 */
+  "epc15",			/* 191 */
+  "depc",			/* 192 */
+
+  "reserved_193",		/* 193 */
+
+  "eps2",	        	/* 194 */
+  "eps3",	        	/* 195 */
+  "eps4",	        	/* 196 */
+  "eps5",	        	/* 197 */
+  "eps6",	        	/* 198 */
+  "eps7",	        	/* 199 */
+  "eps8",	        	/* 200 */
+  "eps9",	        	/* 201 */
+  "eps10",			/* 202 */
+  "eps11",			/* 203 */
+  "eps12",			/* 204 */
+  "eps13",			/* 205 */
+  "eps14",			/* 206 */
+  "eps15",			/* 207 */
+
+  "reserved_208",		/* 208 */
+
+  "excsave1",			/* 209 */
+  "excsave2",			/* 210 */
+  "excsave3",			/* 211 */
+  "excsave4",			/* 212 */
+  "excsave5",			/* 213 */
+  "excsave6",			/* 214 */
+  "excsave7",			/* 215 */
+  "excsave8",			/* 216 */
+  "excsave9",			/* 217 */
+  "excsave10",       		/* 218 */
+  "excsave11",       		/* 219 */
+  "excsave12",       		/* 220 */
+  "excsave13",       		/* 221 */
+  "excsave14",       		/* 222 */
+  "excsave15",       		/* 223 */
+  "cpenable",			/* 224 */
+
+  "reserved_225",		/* 225 */
+
+  "interrupt",			/* 226 */
+  "interrupt2",			/* 227 */
+  "intenable",			/* 228 */
+
+  "reserved_229",		/* 229 */
+
+  "ps",				/* 230 */
+
+  "reserved_231",		/* 231 */
+
+  "exccause",			/* 232 */
+  "debugcause",			/* 233 */
+  "ccount",			/* 234 */
+  "prid",			/* 235 */
+  "icount",			/* 236 */
+  "icountlvl", 			/* 237 */
+  "excvaddr",			/* 238 */
+
+  "reserved_239",		/* 239 */
+
+  "ccompare0",			/* 240 */
+  "ccompare1",			/* 241 */
+  "ccompare2",			/* 242 */
+  "ccompare3",			/* 243 */
+
+  "misc0",			/* 244 */
+  "misc1",	 		/* 245 */
+  "misc2",			/* 246 */
+  "misc3",			/* 247 */
+
+  "reserved_248",		/* 248 */
+  "reserved_249",	        /* 249 */
+  "reserved_250",	       	/* 250 */
+  "reserved_251",		/* 251 */
+  "reserved_252",		/* 252 */
+  "reserved_253",	        /* 253 */
+  "reserved_254",	       	/* 254 */
+  "reserved_255",	       	/* 255 */
+};
+
+
+int show_raw_fields;
+
+static int fetch_data
+  PARAMS ((struct disassemble_info *info, bfd_vma memaddr, int numBytes));
+static void print_xtensa_operand
+  PARAMS ((bfd_vma, struct disassemble_info *, xtensa_operand,
+	   unsigned operand_val, int print_sr_name));
+
+struct dis_private {
+  bfd_byte *byte_buf;
+  jmp_buf bailout;
+};
+
+static int
+fetch_data (info, memaddr, numBytes)
+     struct disassemble_info *info;
+     bfd_vma memaddr;
+     int numBytes;
+{
+  int length, status = 0;
+  struct dis_private *priv = (struct dis_private *) info->private_data;
+  int insn_size = (numBytes != 0 ? numBytes :
+		   xtensa_insn_maxlength (xtensa_default_isa));
+
+  /* Read the maximum instruction size, padding with zeros if we go past
+     the end of the text section.  This code will automatically adjust
+     length when we hit the end of the buffer.  */
+
+  memset (priv->byte_buf, 0, insn_size);
+  for (length = insn_size; length > 0; length--)
+    {
+      status = (*info->read_memory_func) (memaddr, priv->byte_buf, length,
+					  info);
+      if (status == 0)
+	return length;
+    }
+  (*info->memory_error_func) (status, memaddr, info);
+  longjmp (priv->bailout, 1);
+  /*NOTREACHED*/
+}
+
+
+static void
+print_xtensa_operand (memaddr, info, opnd, operand_val, print_sr_name)
+     bfd_vma memaddr;
+     struct disassemble_info *info;
+     xtensa_operand opnd;
+     unsigned operand_val;
+     int print_sr_name;
+{
+  char *kind = xtensa_operand_kind (opnd);
+  int signed_operand_val;
+    
+  if (show_raw_fields)
+    {
+      if (operand_val < 0xa)
+	(*info->fprintf_func) (info->stream, "%u", operand_val);
+      else
+	(*info->fprintf_func) (info->stream, "0x%x", operand_val);
+      return;
+    }
+
+  operand_val = xtensa_operand_decode (opnd, operand_val);
+  signed_operand_val = (int) operand_val;
+
+  if (xtensa_operand_isPCRelative (opnd))
+    {
+      operand_val = xtensa_operand_undo_reloc (opnd, operand_val, memaddr);
+      info->target = operand_val;
+      (*info->print_address_func) (info->target, info);
+    }
+  else if (!strcmp (kind, "i"))
+    {
+      if (print_sr_name
+	  && signed_operand_val >= 0
+	  && signed_operand_val <= 255)
+	(*info->fprintf_func) (info->stream, "%s",
+			       state_names[signed_operand_val]);
+      else if ((signed_operand_val > -256) && (signed_operand_val < 256))
+	(*info->fprintf_func) (info->stream, "%d", signed_operand_val);
+      else
+	(*info->fprintf_func) (info->stream, "0x%x",signed_operand_val);
+    }
+  else
+    (*info->fprintf_func) (info->stream, "%s%u", kind, operand_val);
+}
+
+
+/* Print the Xtensa instruction at address MEMADDR on info->stream.
+   Returns length of the instruction in bytes.  */
+
+int
+print_insn_xtensa (memaddr, info)
+     bfd_vma memaddr;
+     struct disassemble_info *info;
+{
+  unsigned operand_val;
+  int bytes_fetched, size, maxsize, i, noperands;
+  xtensa_isa isa;
+  xtensa_opcode opc;
+  char *op_name;
+  int print_sr_name;
+  struct dis_private priv;
+  static bfd_byte *byte_buf = NULL;
+  static xtensa_insnbuf insn_buffer = NULL;
+
+  if (!xtensa_default_isa)
+    (void) xtensa_isa_init ();
+
+  info->target = 0;
+  maxsize = xtensa_insn_maxlength (xtensa_default_isa);
+
+  /* Set bytes_per_line to control the amount of whitespace between the hex
+     values and the opcode.  For Xtensa, we always print one "chunk" and we
+     vary bytes_per_chunk to determine how many bytes to print.  (objdump
+     would apparently prefer that we set bytes_per_chunk to 1 and vary
+     bytes_per_line but that makes it hard to fit 64-bit instructions on
+     an 80-column screen.)  The value of bytes_per_line here is not exactly
+     right, because objdump adds an extra space for each chunk so that the
+     amount of whitespace depends on the chunk size.  Oh well, it's good
+     enough....  Note that we set the minimum size to 4 to accomodate
+     literal pools.  */
+  info->bytes_per_line = MAX (maxsize, 4);
+
+  /* Allocate buffers the first time through.  */
+  if (!insn_buffer)
+    insn_buffer = xtensa_insnbuf_alloc (xtensa_default_isa);
+  if (!byte_buf)
+    byte_buf = (bfd_byte *) malloc (MAX (maxsize, 4));
+
+  priv.byte_buf = byte_buf;
+
+  info->private_data = (PTR) &priv;
+  if (setjmp (priv.bailout) != 0)
+      /* Error return.  */
+      return -1;
+
+  /* Don't set "isa" before the setjmp to keep the compiler from griping.  */
+  isa = xtensa_default_isa;
+
+  /* Fetch the maximum size instruction.  */
+  bytes_fetched = fetch_data (info, memaddr, 0);
+
+  /* Copy the bytes into the decode buffer.  */
+  memset (insn_buffer, 0, (xtensa_insnbuf_size (isa) *
+			   sizeof (xtensa_insnbuf_word)));
+  xtensa_insnbuf_from_chars (isa, insn_buffer, priv.byte_buf);
+
+  opc = xtensa_decode_insn (isa, insn_buffer);
+  if (opc == XTENSA_UNDEFINED
+      || ((size = xtensa_insn_length (isa, opc)) > bytes_fetched))
+    {
+      (*info->fprintf_func) (info->stream, ".byte %#02x", priv.byte_buf[0]);
+      return 1;
+    }
+
+  op_name = (char *) xtensa_opcode_name (isa, opc);
+  (*info->fprintf_func) (info->stream, "%s", op_name);
+
+  print_sr_name = (!strcasecmp (op_name, "wsr")
+		   || !strcasecmp (op_name, "xsr")
+		   || !strcasecmp (op_name, "rsr"));
+
+  /* Print the operands (if any).  */
+  noperands = xtensa_num_operands (isa, opc);
+  if (noperands > 0)
+    {
+      int first = 1;
+
+      (*info->fprintf_func) (info->stream, "\t");
+      for (i = 0; i < noperands; i++)
+	{
+	  xtensa_operand opnd = xtensa_get_operand (isa, opc, i);
+
+	  if (first)
+	    first = 0;
+	  else
+	    (*info->fprintf_func) (info->stream, ", ");
+	  operand_val = xtensa_operand_get_field (opnd, insn_buffer);
+	  print_xtensa_operand (memaddr, info, opnd, operand_val,
+				print_sr_name);
+        }
+    }
+
+  info->bytes_per_chunk = size;
+  info->display_endian = info->endian;
+
+  return size;
+}
+