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Fri Apr 24 16:07:57 1998 Alan Modra <alan@spri.levels.unisa.edu.au>

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* i386-dis.c (OP_DSSI): Print segment override.
This commit is contained in:
Ian Lance Taylor 1998-04-24 20:09:22 +00:00
parent 66a9a2633c
commit 409595b889
2 changed files with 58 additions and 17 deletions
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4
opcodes/ChangeLog
View file

@ -1,3 +1,7 @@
Fri Apr 24 16:07:57 1998 Alan Modra <alan@spri.levels.unisa.edu.au>
* i386-dis.c (OP_DSSI): Print segment override.
start-sanitize-r5900
Thu Apr 23 12:32:07 1998 Frank Ch. Eigler <fche@cygnus.com>

71
opcodes/i386-dis.c
View file

@ -1,5 +1,5 @@
/* Print i386 instructions for GDB, the GNU debugger.
Copyright (C) 1988, 89, 91, 93, 94, 95, 96, 1997
Copyright (C) 1988, 89, 91, 93, 94, 95, 96, 97, 1998
Free Software Foundation, Inc.
This file is part of GDB.
@ -418,9 +418,9 @@ static struct dis386 dis386[] = {
{ "movS", Ev, Gv },
{ "movb", Gb, Eb },
{ "movS", Gv, Ev },
{ "movw", Ew, Sw },
{ "movS", Ev, Sw },
{ "leaS", Gv, M },
{ "movw", Sw, Ew },
{ "movS", Sw, Ev },
{ "popS", Ev },
/* 90 */
{ "nop" },
@ -809,7 +809,7 @@ static const unsigned char twobyte_has_modrm[256] = {
/* a0 */ 0,0,0,1,1,1,1,1,0,0,0,1,1,1,1,1, /* af */
/* b0 */ 1,1,1,1,1,1,1,1,0,0,1,1,1,1,1,1, /* bf */
/* c0 */ 1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0, /* cf */
/* d0 */ 0,1,1,1,0,1,0,0,1,1,1,0,1,1,0,1, /* df */
/* d0 */ 0,1,1,1,0,1,0,0,1,1,0,1,1,1,0,1, /* df */
/* e0 */ 0,1,1,0,0,1,0,0,1,1,0,1,1,1,0,1, /* ef */
/* f0 */ 0,1,1,1,0,1,0,0,1,1,1,0,1,1,1,0 /* ff */
};
@ -1164,6 +1164,8 @@ int
print_insn_x86 (pc, info, aflag, dflag)
bfd_vma pc;
disassemble_info *info;
int aflag;
int dflag;
{
struct dis386 *dp;
int i;
@ -1753,8 +1755,8 @@ OP_E (bytemode, aflag, dflag)
int havesib;
int havebase;
int base;
int index;
int scale;
int index = 0;
int scale = 0;
havesib = 0;
havebase = 1;
@ -1781,7 +1783,9 @@ OP_E (bytemode, aflag, dflag)
break;
case 1:
FETCH_DATA (the_info, codep + 1);
disp = *(char *)codep++;
disp = *codep++;
if ((disp & 0x80) != 0)
disp -= 0x100;
break;
case 2:
disp = get32 ();
@ -1818,14 +1822,22 @@ OP_E (bytemode, aflag, dflag)
{
case 0:
if (rm == 6)
disp = (short) get16 ();
{
disp = get16 ();
if ((disp & 0x8000) != 0)
disp -= 0x10000;
}
break;
case 1:
FETCH_DATA (the_info, codep + 1);
disp = *(char *)codep++;
disp = *codep++;
if ((disp & 0x80) != 0)
disp -= 0x100;
break;
case 2:
disp = (short) get16 ();
disp = get16 ();
if ((disp & 0x8000) != 0)
disp -= 0x10000;
break;
}
@ -1989,16 +2001,24 @@ OP_sI (bytemode, aflag, dflag)
{
case b_mode:
FETCH_DATA (the_info, codep + 1);
op = *(char *)codep++;
op = *codep++;
if ((op & 0x80) != 0)
op -= 0x100;
break;
case v_mode:
if (dflag)
op = get32 ();
else
op = (short)get16();
{
op = get16();
if ((op & 0x8000) != 0)
op -= 0x10000;
}
break;
case w_mode:
op = (short)get16 ();
op = get16 ();
if ((op & 0x8000) != 0)
op -= 0x10000;
break;
default:
oappend ("<internal disassembler error>");
@ -2022,14 +2042,18 @@ OP_J (bytemode, aflag, dflag)
{
case b_mode:
FETCH_DATA (the_info, codep + 1);
disp = *(char *)codep++;
disp = *codep++;
if ((disp & 0x80) != 0)
disp -= 0x100;
break;
case v_mode:
if (dflag)
disp = get32 ();
else
{
disp = (short)get16 ();
disp = get16 ();
if ((disp & 0x8000) != 0)
disp -= 0x10000;
/* for some reason, a data16 prefix on a jump instruction
means that the pc is masked to 16 bits after the
displacement is added! */
@ -2090,7 +2114,11 @@ OP_DIR (size, aflag, dflag)
if (aflag)
offset = get32 ();
else
offset = (short)get16 ();
{
offset = get16 ();
if ((offset & 0x8000) != 0)
offset -= 0x10000;
}
offset = start_pc + codep - start_codep + offset;
set_op (offset);
@ -2145,7 +2173,16 @@ OP_DSSI (dummy, aflag, dflag)
int aflag;
int dflag;
{
oappend ("%ds:(");
if ((prefixes
& (PREFIX_CS
| PREFIX_DS
| PREFIX_SS
| PREFIX_ES
| PREFIX_FS
| PREFIX_GS)) == 0)
prefixes |= PREFIX_DS;
append_prefix ();
oappend ("(");
oappend (aflag ? "%esi" : "%si");
oappend (")");
return (0);