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(print_insn_sparc): When examining values added in to rs1, make sure that

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there are previous instructions.
This commit is contained in:
Nick Clifton 2003-01-29 12:51:57 +00:00
parent 0d9f6d04b2
commit 0f6ab988cc
2 changed files with 59 additions and 44 deletions
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5
opcodes/ChangeLog
View File

@ -1,3 +1,8 @@
2003-01-29 Henric Jungheim <henric@attbi.com>
* sparc-dis.c (print_insn_sparc): When examining values added in
to rs1, make sure that there are previous instructions.
2003-01-23 Nick Clifton <nickc@redhat.com>
* Add sh2e support:

98
opcodes/sparc-dis.c
View File

@ -1,20 +1,20 @@
/* Print SPARC instructions.
Copyright 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
2000, 2002 Free Software Foundation, Inc.
2000, 2002, 2003 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it 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.
This program is distributed in the hope that it 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 program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include <stdio.h>
@ -46,7 +46,8 @@ static const struct sparc_opcode **sorted_opcodes;
static int opcode_bits[4] = { 0x01c00000, 0x0, 0x01f80000, 0x01f80000 };
#define HASH_INSN(INSN) \
((((INSN) >> 24) & 0xc0) | (((INSN) & opcode_bits[((INSN) >> 30) & 3]) >> 19))
struct opcode_hash {
struct opcode_hash
{
struct opcode_hash *next;
const struct sparc_opcode *opcode;
};
@ -257,7 +258,7 @@ print_insn_sparc (memaddr, info)
}
/* On SPARClite variants such as DANlite (sparc86x), instructions
are always big-endian even when the machine is in little-endian mode. */
are always big-endian even when the machine is in little-endian mode. */
if (info->endian == BFD_ENDIAN_BIG || info->mach == bfd_mach_sparc_sparclite)
getword = bfd_getb32;
else
@ -265,10 +266,10 @@ print_insn_sparc (memaddr, info)
insn = getword (buffer);
info->insn_info_valid = 1; /* We do return this info */
info->insn_type = dis_nonbranch; /* Assume non branch insn */
info->branch_delay_insns = 0; /* Assume no delay */
info->target = 0; /* Assume no target known */
info->insn_info_valid = 1; /* We do return this info. */
info->insn_type = dis_nonbranch; /* Assume non branch insn. */
info->branch_delay_insns = 0; /* Assume no delay. */
info->target = 0; /* Assume no target known. */
for (op = opcode_hash_table[HASH_INSN (insn)]; op; op = op->next)
{
@ -316,32 +317,34 @@ print_insn_sparc (memaddr, info)
if (opcode->args[0] != ',')
(*info->fprintf_func) (stream, " ");
for (s = opcode->args; *s != '\0'; ++s)
{
while (*s == ',')
{
(*info->fprintf_func) (stream, ",");
++s;
switch (*s) {
case 'a':
(*info->fprintf_func) (stream, "a");
is_annulled = 1;
++s;
continue;
case 'N':
(*info->fprintf_func) (stream, "pn");
++s;
continue;
switch (*s)
{
case 'a':
(*info->fprintf_func) (stream, "a");
is_annulled = 1;
++s;
continue;
case 'N':
(*info->fprintf_func) (stream, "pn");
++s;
continue;
case 'T':
(*info->fprintf_func) (stream, "pt");
++s;
continue;
case 'T':
(*info->fprintf_func) (stream, "pt");
++s;
continue;
default:
break;
} /* switch on arg */
} /* while there are comma started args */
default:
break;
}
}
(*info->fprintf_func) (stream, " ");
@ -682,26 +685,33 @@ print_insn_sparc (memaddr, info)
unsigned long prev_insn;
int errcode;
errcode =
(*info->read_memory_func)
if (memaddr >= 4)
errcode =
(*info->read_memory_func)
(memaddr - 4, buffer, sizeof (buffer), info);
else
errcode = 1;
prev_insn = getword (buffer);
if (errcode == 0)
{
/* If it is a delayed branch, we need to look at the
instruction before the delayed branch. This handles
sequences such as
sequences such as:
sethi %o1, %hi(_foo), %o1
call _printf
or %o1, %lo(_foo), %o1
*/
or %o1, %lo(_foo), %o1 */
if (is_delayed_branch (prev_insn))
{
errcode = (*info->read_memory_func)
(memaddr - 8, buffer, sizeof (buffer), info);
if (memaddr >= 8)
errcode = (*info->read_memory_func)
(memaddr - 8, buffer, sizeof (buffer), info);
else
errcode = 1;
prev_insn = getword (buffer);
}
}
@ -746,7 +756,7 @@ print_insn_sparc (memaddr, info)
}
}
info->insn_type = dis_noninsn; /* Mark as non-valid instruction */
info->insn_type = dis_noninsn; /* Mark as non-valid instruction. */
(*info->fprintf_func) (stream, _("unknown"));
return sizeof (buffer);
}