| Line 1... |
Line 1... |
/* Instruction printing code for the OpenRISC 1000
|
/* Instruction printing code for the OpenRISC 1000
|
|
|
Copyright (C) 2002, 2005, 2007 Free Software Foundation, Inc.
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Copyright (C) 2002, 2005, 2007 Free Software Foundation, Inc.
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Copyright (C) 2008 Embecosm Limited
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|
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Contributed by Damjan Lampret <lampret@opencores.org>.
|
Contributed by Damjan Lampret <lampret@opencores.org>.
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Modified from a29k port.
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Modified from a29k port.
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Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>
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|
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This file is part of the GNU opcodes library.
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This file is part of the GNU opcodes library.
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|
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This program is free software; you can redistribute it and/or modify it
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This library is free software; you can redistribute it and/or modify
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under the terms of the GNU General Public License as published by the Free
|
it under the terms of the GNU General Public License as published by
|
Software Foundation; either version 3 of the License, or (at your option)
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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any later version.
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|
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This program is distributed in the hope that it will be useful, but WITHOUT
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It is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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more details.
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License for more details.
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You should have received a copy of the GNU General Public License along
|
You should have received a copy of the GNU General Public License
|
with this program. If not, see <http://www.gnu.org/licenses/>. */
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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/*-----------------------------------------------------------------------------
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MA 02110-1301, USA. */
|
This version for the OpenRISC 1000 architecture is an update by Jeremy
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|
Bennett for GDB 6.8. All code converted to ANSI C style and in general to
|
|
GDB format.
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Signed immediate constants are printed as such (the old version printed
|
|
them as unsigned hex). Where appropriate symbolic names are used for
|
|
immediate branch and jump targets.
|
|
--------------------------------------------------------------------------*/
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|
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#define DEBUG 0
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|
|
#include "dis-asm.h"
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#include "dis-asm.h"
|
#include "opcode/or32.h"
|
#include "opcode/or32.h"
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#include "safe-ctype.h"
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#include "safe-ctype.h"
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#include <string.h>
|
#include <string.h>
|
#include <stdlib.h>
|
#include <stdlib.h>
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|
|
|
#define EXTEND28(x) ((x) & (unsigned long) 0x08000000 ? ((x) | (unsigned long) 0xf0000000) : ((x)))
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|
|
#define EXTEND29(x) ((x) & (unsigned long) 0x10000000 ? ((x) | (unsigned long) 0xf0000000) : ((x)))
|
/* Now find the four bytes of INSN_CH and put them in *INSN. */
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|
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/* A cop out - this is in defs.h, but including that from the main GDB
|
|
component would be a pain. Really the dependency on CORE_ADDR ought to be
|
|
added to the or1k-tdep.c, rather than being here. Something for the
|
|
future. */
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|
typedef bfd_vma CORE_ADDR;
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|
|
|
|
|
/* Function to look up an address as a symbol. Found in the GDB area */
|
|
extern int
|
|
build_address_symbolic (CORE_ADDR addr,
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int do_demangle,
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char **name,
|
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int *offset,
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char **filename,
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int *line,
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int *unmapped);
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|
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|
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/*!----------------------------------------------------------------------------
|
|
Map 4 bytes of instruction into one 32-bit word for big-endian target
|
|
|
|
@param[in] insn_ch The 4 bytes of the instruction
|
|
@param[out] insn The 32-bit word
|
|
--------------------------------------------------------------------------*/
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|
|
|
static void
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static void
|
find_bytes_big (unsigned char *insn_ch,
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find_bytes_big (unsigned char *insn_ch, unsigned long *insn)
|
unsigned long *insn)
|
|
{
|
{
|
*insn =
|
*insn =
|
((unsigned long) insn_ch[0] << 24) +
|
((unsigned long) insn_ch[0] << 24) +
|
((unsigned long) insn_ch[1] << 16) +
|
((unsigned long) insn_ch[1] << 16) +
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((unsigned long) insn_ch[2] << 8) +
|
((unsigned long) insn_ch[2] << 8) +
|
((unsigned long) insn_ch[3]);
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((unsigned long) insn_ch[3]);
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|
#if DEBUG
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} /* find_bytes_big() */
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printf ("find_bytes_big3: %x\n", *insn);
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|
#endif
|
|
}
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/*!----------------------------------------------------------------------------
|
|
Map 4 bytes of instruction into one 32-bit word for little-endian target
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|
|
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@param[in] insn_ch The 4 bytes of the instruction
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@param[out] insn The 32-bit word
|
|
--------------------------------------------------------------------------*/
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|
|
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static void
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static void
|
find_bytes_little (unsigned char *insn_ch,
|
find_bytes_little (unsigned char *insn_ch, unsigned long *insn)
|
unsigned long *insn)
|
|
{
|
{
|
*insn =
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*insn =
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((unsigned long) insn_ch[3] << 24) +
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((unsigned long) insn_ch[3] << 24) +
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((unsigned long) insn_ch[2] << 16) +
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((unsigned long) insn_ch[2] << 16) +
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((unsigned long) insn_ch[1] << 8) +
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((unsigned long) insn_ch[1] << 8) +
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((unsigned long) insn_ch[0]);
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((unsigned long) insn_ch[0]);
|
|
}
|
|
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} /* find_bytes_little() */
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typedef void (*find_byte_func_type) (unsigned char *, unsigned long *);
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/*!----------------------------------------------------------------------------
|
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Extract an instruction field
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@param[in] param_ch The character identifying the field
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@param[in] enc_initial A string with 1 char for each bit in the
|
|
instruction, the char indicating the field the bit
|
|
belongs to
|
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@param[in] insn The instruction
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|
|
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@return The value of the field
|
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--------------------------------------------------------------------------*/
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static unsigned long
|
static unsigned long
|
or32_extract (char param_ch,
|
or32_extract (char param_ch, char *enc_initial, unsigned long insn)
|
char *enc_initial,
|
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unsigned long int insn)
|
|
{
|
{
|
char *enc;
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char *enc;
|
unsigned long int ret = 0;
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unsigned long ret = 0;
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int opc_pos = 0;
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int opc_pos = 0;
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int param_pos = 0;
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int param_pos = 0;
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|
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for (enc = enc_initial; *enc != '\0'; enc++)
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for (enc = enc_initial; *enc != '\0'; enc++)
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{
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if (*enc == param_ch)
|
if (*enc == param_ch)
|
{
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{
|
if ((enc - 2 >= enc_initial) &&
|
if (enc - 2 >= enc_initial && (*(enc - 2) == '0') && (*(enc - 1) == 'x'))
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(*(enc - 2) == '0') &&
|
|
(*(enc - 1) == 'x'))
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|
{
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|
continue;
|
continue;
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}
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|
else
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else
|
{
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|
param_pos++;
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param_pos++;
|
}
|
}
|
}
|
|
}
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|
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|
|
#if DEBUG
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printf ("or32_extract: %c %x ", param_ch, param_pos);
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#endif
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opc_pos = 32;
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opc_pos = 32;
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|
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for (enc = enc_initial; *enc != '\0'; )
|
for (enc = enc_initial; *enc != '\0'; )
|
{
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|
if ((*enc == '0') && (*(enc + 1) == 'x'))
|
if ((*enc == '0') && (*(enc + 1) == 'x'))
|
{
|
{
|
opc_pos -= 4;
|
opc_pos -= 4;
|
|
|
if ((param_ch == '0') || (param_ch == '1'))
|
if ((param_ch == '0') || (param_ch == '1'))
|
{
|
{
|
unsigned long tmp = strtoul (enc, NULL, 16);
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unsigned long tmp = strtoul (enc, NULL, 16);
|
|
#if DEBUG
|
if (param_ch == '0') {
|
printf (" enc=%s, tmp=%x ", enc, tmp);
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#endif
|
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if (param_ch == '0')
|
tmp = 15 - tmp;
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tmp = 15 - tmp;
|
}
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|
|
|
ret |= tmp << opc_pos;
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ret |= tmp << opc_pos;
|
}
|
}
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|
|
enc += 3;
|
enc += 3;
|
}
|
}
|
else if ((*enc == '0') || (*enc == '1'))
|
else if ((*enc == '0') || (*enc == '1'))
|
{
|
{
|
opc_pos--;
|
opc_pos--;
|
|
if (param_ch == *enc)
|
if (param_ch == *enc) {
|
|
ret |= 1 << opc_pos;
|
ret |= 1 << opc_pos;
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}
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|
|
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enc++;
|
enc++;
|
}
|
}
|
else if (*enc == param_ch)
|
else if (*enc == param_ch)
|
{
|
{
|
opc_pos--;
|
opc_pos--;
|
param_pos--;
|
param_pos--;
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|
#if DEBUG
|
|
printf ("\n ret=%x opc_pos=%x, param_pos=%x\n", ret, opc_pos, param_pos);
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#endif
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ret += ((insn >> opc_pos) & 0x1) << param_pos;
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ret += ((insn >> opc_pos) & 0x1) << param_pos;
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|
|
if (!param_pos &&
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if (!param_pos
|
letter_signed (param_ch) &&
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&& letter_signed (param_ch)
|
ret >> (letter_range (param_ch) - 1))
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&& ret >> (letter_range (param_ch) - 1))
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{
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{
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#if DEBUG
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printf ("\n ret=%x opc_pos=%x, param_pos=%x\n",
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ret, opc_pos, param_pos);
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#endif
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ret |= 0xffffffff << letter_range(param_ch);
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ret |= 0xffffffff << letter_range(param_ch);
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|
#if DEBUG
|
|
printf ("\n after conversion to signed: ret=%x\n", ret);
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|
#endif
|
}
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}
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enc++;
|
enc++;
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}
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}
|
else if (ISALPHA (*enc))
|
else if (ISALPHA (*enc))
|
{
|
{
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| Line 193... |
Line 136... |
{
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{
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opc_pos--;
|
opc_pos--;
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enc++;
|
enc++;
|
}
|
}
|
else
|
else
|
{
|
|
enc++;
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enc++;
|
}
|
|
}
|
|
|
|
|
#if DEBUG
|
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printf ("ret=%x\n", ret);
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#endif
|
return ret;
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return ret;
|
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}
|
} /* or32_extract() */
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|
|
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|
|
/*!----------------------------------------------------------------------------
|
|
Test if an instruction matches an encoding
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|
|
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@param[in] insn The instruction
|
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@param[in] encoding The encoding
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|
|
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@return 1 (true) if they match, 0 otherwise
|
|
--------------------------------------------------------------------------*/
|
|
|
|
static int
|
static int
|
or32_opcode_match (unsigned long insn, char *encoding)
|
or32_opcode_match (unsigned long insn, char *encoding)
|
{
|
{
|
unsigned long ones, zeros;
|
unsigned long ones, zeros;
|
|
|
|
#if DEBUG
|
|
printf ("or32_opcode_match: %.8lx\n", insn);
|
|
#endif
|
ones = or32_extract ('1', encoding, insn);
|
ones = or32_extract ('1', encoding, insn);
|
zeros = or32_extract ('0', encoding, insn);
|
zeros = or32_extract ('0', encoding, insn);
|
|
|
|
// Added 090430 - jb - fixed problem where upper 4 bytes of a 64-bit long weren't getting setup properly for comparison
|
|
// As a result, instructions weren't getting decoded properly
|
|
insn &= 0xffffffff;
|
|
ones &= 0xffffffff;
|
|
zeros &= 0xffffffff;
|
|
|
|
#if DEBUG
|
|
printf ("ones: %x \n", ones);
|
|
printf ("zeros: %x \n", zeros);
|
|
#endif
|
if ((insn & ones) != ones)
|
if ((insn & ones) != ones)
|
{
|
{
|
|
#if DEBUG
|
|
printf ("ret1\n");
|
|
#endif
|
return 0;
|
return 0;
|
}
|
}
|
|
|
if ((~insn & zeros) != zeros)
|
if ((~insn & zeros) != zeros)
|
{
|
{
|
|
#if DEBUG
|
|
printf ("ret2\n");
|
|
#endif
|
return 0;
|
return 0;
|
}
|
}
|
|
|
|
#if DEBUG
|
|
printf ("ret3\n");
|
|
#endif
|
return 1;
|
return 1;
|
|
}
|
|
|
} /* or32_opcode_match() */
|
/* Print register to INFO->STREAM. Used only by print_insn. */
|
|
|
|
|
/*!----------------------------------------------------------------------------
|
|
Print register to INFO->STREAM.
|
|
|
|
Used only by print_insn.
|
|
|
|
@param[in] param_ch The character encoding the field of interest
|
|
@param[in] encoding The encoding
|
|
@param[in] insn The instruction
|
|
@param[in] info Info about the disassembly, in particular with the
|
|
stream to write to.
|
|
--------------------------------------------------------------------------*/
|
|
|
|
static void
|
static void
|
or32_print_register (char param_ch,
|
or32_print_register (char param_ch,
|
char *encoding,
|
char *encoding,
|
unsigned long insn,
|
unsigned long insn,
|
struct disassemble_info *info)
|
struct disassemble_info *info)
|
{
|
{
|
int regnum = or32_extract (param_ch, encoding, insn);
|
int regnum = or32_extract (param_ch, encoding, insn);
|
|
|
switch (param_ch)
|
#if DEBUG
|
{
|
printf ("or32_print_register: %c, %s, %x\n", param_ch, encoding, insn);
|
case 'A':
|
#endif
|
case 'B':
|
if (param_ch == 'A')
|
case 'D':
|
|
(*info->fprintf_func) (info->stream, "r%d", regnum);
|
(*info->fprintf_func) (info->stream, "r%d", regnum);
|
break;
|
else if (param_ch == 'B')
|
|
(*info->fprintf_func) (info->stream, "r%d", regnum);
|
default:
|
else if (param_ch == 'D')
|
if (regnum < 16)
|
(*info->fprintf_func) (info->stream, "r%d", regnum);
|
{
|
else if (regnum < 16)
|
(*info->fprintf_func) (info->stream, "r%d", regnum);
|
(*info->fprintf_func) (info->stream, "r%d", regnum);
|
}
|
|
else if (regnum < 32)
|
else if (regnum < 32)
|
{
|
|
(*info->fprintf_func) (info->stream, "r%d", regnum-16);
|
(*info->fprintf_func) (info->stream, "r%d", regnum-16);
|
}
|
|
else
|
else
|
{
|
|
(*info->fprintf_func) (info->stream, "X%d", regnum);
|
(*info->fprintf_func) (info->stream, "X%d", regnum);
|
}
|
}
|
}
|
|
} /* or32_print_register() */
|
|
|
|
|
|
|
|
/*!----------------------------------------------------------------------------
|
|
Print immediate to INFO->STREAM.
|
|
|
|
Used only by print_insn.
|
|
|
|
Fixed in GDB 6.8 to print signed immediate fields correctly and to set the
|
|
target fields of jump and branch to symbols if possible.
|
|
|
|
@param[in] memaddr Address of this instruction
|
|
@param[in] param_ch The character encoding the field of interest
|
|
@param[in] encoding The encoding
|
|
@param[in] insn The instruction
|
|
@param[in] info Info about the disassembly, in particular with the
|
|
stream to write to.
|
|
--------------------------------------------------------------------------*/
|
|
|
|
/* Print immediate to INFO->STREAM. Used only by print_insn. */
|
/* Print immediate to INFO->STREAM. Used only by print_insn. */
|
|
|
static void
|
static void
|
or32_print_immediate( bfd_vma memaddr,
|
or32_print_immediate (char param_ch,
|
char param_ch,
|
|
char *encoding,
|
char *encoding,
|
unsigned long insn,
|
unsigned long insn,
|
struct disassemble_info *info)
|
struct disassemble_info *info)
|
{
|
{
|
int imm = or32_extract(param_ch, encoding, insn);
|
int imm = or32_extract(param_ch, encoding, insn);
|
|
|
if ('N' == param_ch)
|
if (letter_signed(param_ch))
|
{
|
|
CORE_ADDR target_addr = (CORE_ADDR)(memaddr + (4 * imm));
|
|
char *name = NULL;
|
|
char *filename = NULL;
|
|
int unmapped = 0;
|
|
int offset = 0;
|
|
int line = 0;
|
|
|
|
if( 0 == build_address_symbolic( target_addr, 1, &name, &offset,
|
|
&filename, &line, &unmapped ))
|
|
{
|
|
(*info->fprintf_func) (info->stream, "<" );
|
|
|
|
if( unmapped )
|
|
{
|
|
(*info->fprintf_func) (info->stream, "*");
|
|
}
|
|
|
|
(*info->fprintf_func) (info->stream, "%s", name);
|
|
|
|
if( offset )
|
|
{
|
|
(*info->fprintf_func) (info->stream, "+%d", offset);
|
|
}
|
|
|
|
(*info->fprintf_func) (info->stream, ">" );
|
|
}
|
|
else
|
|
{
|
|
(*info->fprintf_func) (info->stream, "0x%x", imm);
|
(*info->fprintf_func) (info->stream, "0x%x", imm);
|
}
|
/* (*info->fprintf_func) (info->stream, "%d", imm); */
|
}
|
|
else if (letter_signed(param_ch))
|
|
{
|
|
(*info->fprintf_func) (info->stream, "%d", imm);
|
|
}
|
|
else
|
else
|
{
|
|
(*info->fprintf_func) (info->stream, "0x%x", imm);
|
(*info->fprintf_func) (info->stream, "0x%x", imm);
|
}
|
}
|
} /* or32_print_immediate() */
|
|
|
|
|
|
/*!----------------------------------------------------------------------------
|
|
Print one instruction
|
|
|
|
Print one instruction from MEMADDR on INFO->STREAM.
|
|
|
|
@param[in] memaddr Address of the instruction to print
|
|
@param[in] info Info about the disassembly, in particular with the
|
|
stream to write to.
|
|
|
|
@return The size of the instruction (always 4 on or32).
|
/* Print one instruction from MEMADDR on INFO->STREAM.
|
--------------------------------------------------------------------------*/
|
Return the size of the instruction (always 4 on or32). */
|
|
|
static int
|
static int
|
print_insn (bfd_vma memaddr,
|
print_insn (bfd_vma memaddr, struct disassemble_info *info)
|
struct disassemble_info *info)
|
|
{
|
{
|
/* The raw instruction. */
|
/* The raw instruction. */
|
unsigned char insn_ch[4];
|
unsigned char insn_ch[4];
|
/* Address. Will be sign extened 27-bit. */
|
/* Address. Will be sign extened 27-bit. */
|
unsigned long addr;
|
unsigned long addr;
|
/* The four bytes of the instruction. */
|
/* The four bytes of the instruction. */
|
unsigned long insn;
|
unsigned long insn;
|
|
|
typedef void (*find_byte_func_type) (unsigned char *, unsigned long *);
|
|
|
|
find_byte_func_type find_byte_func = (find_byte_func_type) info->private_data;
|
find_byte_func_type find_byte_func = (find_byte_func_type) info->private_data;
|
struct or32_opcode const *opcode;
|
struct or32_opcode const *opcode;
|
|
|
|
{
|
int status =
|
int status =
|
(*info->read_memory_func) (memaddr, (bfd_byte *) &insn_ch[0], 4, info);
|
(*info->read_memory_func) (memaddr, (bfd_byte *) &insn_ch[0], 4, info);
|
|
|
if (status != 0)
|
if (status != 0)
|
{
|
{
|
(*info->memory_error_func) (status, memaddr, info);
|
(*info->memory_error_func) (status, memaddr, info);
|
return -1;
|
return -1;
|
}
|
}
|
|
}
|
|
|
(*find_byte_func) (&insn_ch[0], &insn);
|
(*find_byte_func) (&insn_ch[0], &insn);
|
|
|
for (opcode = &or32_opcodes[0];
|
for (opcode = &or32_opcodes[0];
|
opcode < &or32_opcodes[or32_num_opcodes];
|
opcode < &or32_opcodes[or32_num_opcodes];
|
| Line 399... |
Line 267... |
{
|
{
|
if (or32_opcode_match (insn, opcode->encoding))
|
if (or32_opcode_match (insn, opcode->encoding))
|
{
|
{
|
char *s;
|
char *s;
|
|
|
(*info->fprintf_func) (info->stream, "%-8s ", opcode->name);
|
(*info->fprintf_func) (info->stream, "%s ", opcode->name);
|
|
|
for (s = opcode->args; *s != '\0'; ++s)
|
for (s = opcode->args; *s != '\0'; ++s)
|
{
|
{
|
switch (*s)
|
switch (*s)
|
{
|
{
|
| Line 412... |
Line 280... |
|
|
case 'r':
|
case 'r':
|
or32_print_register (*++s, opcode->encoding, insn, info);
|
or32_print_register (*++s, opcode->encoding, insn, info);
|
break;
|
break;
|
|
|
case 'X':
|
case 'N':
|
addr = or32_extract ('X', opcode->encoding, insn) << 2;
|
addr = or32_extract ('N', opcode->encoding, insn) << 2;
|
|
|
/* Calulate the correct address. XXX is this really correct
|
/* Calulate the correct address. */
|
?? */
|
addr = memaddr + EXTEND28 (addr);
|
addr = memaddr + EXTEND29 (addr);
|
|
|
|
(*info->print_address_func)
|
(*info->print_address_func)
|
(addr, info);
|
(addr, info);
|
break;
|
break;
|
|
|
default:
|
default:
|
if (strchr (opcode->encoding, *s))
|
if (strchr (opcode->encoding, *s))
|
{
|
or32_print_immediate (*s, opcode->encoding, insn, info);
|
or32_print_immediate (memaddr, *s, opcode->encoding,
|
|
insn, info);
|
|
}
|
|
else
|
else
|
{
|
|
(*info->fprintf_func) (info->stream, "%c", *s);
|
(*info->fprintf_func) (info->stream, "%c", *s);
|
}
|
}
|
}
|
}
|
}
|
|
|
|
return 4;
|
return 4;
|
}
|
}
|
}
|
}
|
|
|
/* This used to be %8x for binutils. */
|
/* This used to be %8x for binutils. */
|
(*info->fprintf_func) (info->stream, ".word 0x%08lx", insn);
|
(*info->fprintf_func)
|
|
(info->stream, ".word 0x%08lx", insn);
|
return 4;
|
return 4;
|
|
}
|
|
|
} /* print_insn() */
|
/* Disassemble a big-endian or32 instruction. */
|
|
|
|
|
/*!----------------------------------------------------------------------------
|
|
Disassemble a big-endian or32 instruction
|
|
|
|
Print one instruction from MEMADDR on INFO->STREAM.
|
|
|
|
@param[in] memaddr Address of the instruction to print
|
|
@param[in] info Info about the disassembly, in particular with the
|
|
stream to write to.
|
|
|
|
@return The size of the instruction (always 4 on or32).
|
|
--------------------------------------------------------------------------*/
|
|
|
|
int
|
int
|
print_insn_big_or32 (bfd_vma memaddr,
|
print_insn_big_or32 (bfd_vma memaddr, struct disassemble_info *info)
|
struct disassemble_info *info)
|
|
{
|
{
|
info->private_data = find_bytes_big;
|
info->private_data = find_bytes_big;
|
|
|
return print_insn (memaddr, info);
|
return print_insn (memaddr, info);
|
|
}
|
|
|
} /* print_insn_big_or32() */
|
/* Disassemble a little-endian or32 instruction. */
|
|
|
|
|
/*!----------------------------------------------------------------------------
|
|
Disassemble a little-endian or32 instruction
|
|
|
|
Print one instruction from MEMADDR on INFO->STREAM.
|
|
|
|
@param[in] memaddr Address of the instruction to print
|
|
@param[in] info Info about the disassembly, in particular with the
|
|
stream to write to.
|
|
|
|
@return The size of the instruction (always 4 on or32).
|
|
--------------------------------------------------------------------------*/
|
|
|
|
int
|
int
|
print_insn_little_or32 (bfd_vma memaddr,
|
print_insn_little_or32 (bfd_vma memaddr, struct disassemble_info *info)
|
struct disassemble_info *info)
|
|
{
|
{
|
info->private_data = find_bytes_little;
|
info->private_data = find_bytes_little;
|
|
|
return print_insn (memaddr, info);
|
return print_insn (memaddr, info);
|
|
}
|
} /* print_insn_little_or32() */
|
|
|
|
No newline at end of file
|
No newline at end of file
|
