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binutils-gdb/opcodes/xtensa-dis.c

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/* 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));
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)
struct disassemble_info *info;
bfd_vma memaddr;
{
int length, status = 0;
struct dis_private *priv = (struct dis_private *) info->private_data;
int insn_size = 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);
/* 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;
}
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