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authorNick Clifton <nickc@redhat.com>2003-01-29 12:51:57 +0000
committerNick Clifton <nickc@redhat.com>2003-01-29 12:51:57 +0000
commit11e2a22a6af52a0ae8d4e79d890398f2413c12f5 (patch)
tree0eaecb6c7ac14064bda4bd55d7e8840ddfd97986 /opcodes/sparc-dis.c
parentc41de42825a884feff8303d633660cca7a1b3de4 (diff)
downloadgdb-11e2a22a6af52a0ae8d4e79d890398f2413c12f5.tar.gz
(print_insn_sparc): When examining values added in to rs1, make sure that
there are previous instructions.
Diffstat (limited to 'opcodes/sparc-dis.c')
-rw-r--r--opcodes/sparc-dis.c102
1 files changed, 56 insertions, 46 deletions
diff --git a/opcodes/sparc-dis.c b/opcodes/sparc-dis.c
index 47ebb313744..c68df389cb1 100644
--- a/opcodes/sparc-dis.c
+++ b/opcodes/sparc-dis.c
@@ -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;
-
- case 'T':
- (*info->fprintf_func) (stream, "pt");
- ++s;
- continue;
-
- default:
- break;
- } /* switch on arg */
- } /* while there are comma started args */
+ 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;
+
+ 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);
}