1208 lines
22 KiB
C
1208 lines
22 KiB
C
/* m88k.c -- Assembler for the Motorola 88000
|
||
Contributed by Devon Bowen of Buffalo University
|
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and Torbjorn Granlund of the Swedish Institute of Computer Science.
|
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Copyright 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1999,
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2000, 2001, 2002, 2003
|
||
Free Software Foundation, Inc.
|
||
|
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This file is part of GAS, the GNU Assembler.
|
||
|
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GAS is free software; you can redistribute it and/or modify
|
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it 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.
|
||
|
||
GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with GAS; see the file COPYING. If not, write to the Free
|
||
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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||
02111-1307, USA. */
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#include "as.h"
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#include "safe-ctype.h"
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#include "subsegs.h"
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#include "m88k-opcode.h"
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struct field_val_assoc
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||
{
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char *name;
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||
unsigned val;
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||
};
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struct field_val_assoc cr_regs[] =
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||
{
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||
{"PID", 0},
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||
{"PSR", 1},
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{"EPSR", 2},
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{"SSBR", 3},
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{"SXIP", 4},
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{"SNIP", 5},
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{"SFIP", 6},
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{"VBR", 7},
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{"DMT0", 8},
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{"DMD0", 9},
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{"DMA0", 10},
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||
{"DMT1", 11},
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{"DMD1", 12},
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{"DMA1", 13},
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{"DMT2", 14},
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{"DMD2", 15},
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{"DMA2", 16},
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{"SR0", 17},
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{"SR1", 18},
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{"SR2", 19},
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{"SR3", 20},
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||
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{NULL, 0},
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||
};
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||
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struct field_val_assoc fcr_regs[] =
|
||
{
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||
{"FPECR", 0},
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||
{"FPHS1", 1},
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||
{"FPLS1", 2},
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||
{"FPHS2", 3},
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||
{"FPLS2", 4},
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||
{"FPPT", 5},
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{"FPRH", 6},
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{"FPRL", 7},
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{"FPIT", 8},
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||
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{"FPSR", 62},
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||
{"FPCR", 63},
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||
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{NULL, 0},
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||
};
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struct field_val_assoc cmpslot[] =
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{
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||
/* Integer Floating point */
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{"nc", 0},
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{"cp", 1},
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{"eq", 2},
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{"ne", 3},
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{"gt", 4},
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{"le", 5},
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{"lt", 6},
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{"ge", 7},
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{"hi", 8}, {"ou", 8},
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{"ls", 9}, {"ib", 9},
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{"lo", 10}, {"in", 10},
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{"hs", 11}, {"ob", 11},
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{"be", 12}, {"ue", 12},
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{"nb", 13}, {"lg", 13},
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{"he", 14}, {"ug", 14},
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{"nh", 15}, {"ule", 15},
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{"ul", 16},
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{"uge", 17},
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||
|
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{NULL, 0},
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||
};
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||
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struct field_val_assoc cndmsk[] =
|
||
{
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{"gt0", 1},
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{"eq0", 2},
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{"ge0", 3},
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{"lt0", 12},
|
||
{"ne0", 13},
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{"le0", 14},
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||
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{NULL, 0},
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||
};
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||
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struct m88k_insn
|
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{
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unsigned long opcode;
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||
expressionS exp;
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||
enum reloc_type reloc;
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||
};
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||
|
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static char *get_bf PARAMS ((char *param, unsigned *valp));
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||
static char *get_cmp PARAMS ((char *param, unsigned *valp));
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||
static char *get_cnd PARAMS ((char *param, unsigned *valp));
|
||
static char *get_bf2 PARAMS ((char *param, int bc));
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||
static char *get_bf_offset_expression PARAMS ((char *param, unsigned *offsetp));
|
||
static char *get_cr PARAMS ((char *param, unsigned *regnop));
|
||
static char *get_fcr PARAMS ((char *param, unsigned *regnop));
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||
static char *get_imm16 PARAMS ((char *param, struct m88k_insn *insn));
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||
static char *get_o6 PARAMS ((char *param, unsigned *valp));
|
||
static char *match_name PARAMS ((char *, struct field_val_assoc *, unsigned *));
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||
static char *get_reg PARAMS ((char *param, unsigned *regnop, unsigned int reg_prefix));
|
||
static char *get_vec9 PARAMS ((char *param, unsigned *valp));
|
||
static char *getval PARAMS ((char *param, unsigned int *valp));
|
||
|
||
static char *get_pcr PARAMS ((char *param, struct m88k_insn *insn,
|
||
enum reloc_type reloc));
|
||
|
||
static int calcop PARAMS ((struct m88k_opcode *format,
|
||
char *param, struct m88k_insn *insn));
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||
|
||
extern char *myname;
|
||
static struct hash_control *op_hash = NULL;
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||
|
||
/* These bits should be turned off in the first address of every segment */
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int md_seg_align = 7;
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||
|
||
/* These chars start a comment anywhere in a source file (except inside
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||
another comment. */
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||
const char comment_chars[] = ";";
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||
|
||
/* These chars only start a comment at the beginning of a line. */
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||
const char line_comment_chars[] = "#";
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||
|
||
const char line_separator_chars[] = "";
|
||
|
||
/* Chars that can be used to separate mant from exp in floating point nums */
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||
const char EXP_CHARS[] = "eE";
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||
|
||
/* Chars that mean this number is a floating point constant */
|
||
/* as in 0f123.456 */
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||
/* or 0H1.234E-12 (see exp chars above) */
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||
const char FLT_CHARS[] = "dDfF";
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||
|
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const pseudo_typeS md_pseudo_table[] =
|
||
{
|
||
{"align", s_align_bytes, 4},
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||
{"def", s_set, 0},
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{"dfloat", float_cons, 'd'},
|
||
{"ffloat", float_cons, 'f'},
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||
{"half", cons, 2},
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{"bss", s_lcomm, 1},
|
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{"string", stringer, 0},
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||
{"word", cons, 4},
|
||
/* Force set to be treated as an instruction. */
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||
{"set", NULL, 0},
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{".set", s_set, 0},
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||
{NULL, NULL, 0}
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||
};
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||
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void
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||
md_begin ()
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||
{
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||
const char *retval = NULL;
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||
unsigned int i = 0;
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||
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||
/* Initialize hash table. */
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||
op_hash = hash_new ();
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||
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while (*m88k_opcodes[i].name)
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||
{
|
||
char *name = m88k_opcodes[i].name;
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||
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||
/* Hash each mnemonic and record its position. */
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||
retval = hash_insert (op_hash, name, &m88k_opcodes[i]);
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||
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if (retval != NULL)
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||
as_fatal (_("Can't hash instruction '%s':%s"),
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||
m88k_opcodes[i].name, retval);
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||
|
||
/* Skip to next unique mnemonic or end of list. */
|
||
for (i++; !strcmp (m88k_opcodes[i].name, name); i++)
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||
;
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||
}
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||
}
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||
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||
const char *md_shortopts = "";
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||
struct option md_longopts[] = {
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||
{NULL, no_argument, NULL, 0}
|
||
};
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||
size_t md_longopts_size = sizeof (md_longopts);
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||
|
||
int
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||
md_parse_option (c, arg)
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||
int c ATTRIBUTE_UNUSED;
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||
char *arg ATTRIBUTE_UNUSED;
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||
{
|
||
return 0;
|
||
}
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||
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||
void
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||
md_show_usage (stream)
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||
FILE *stream ATTRIBUTE_UNUSED;
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||
{
|
||
}
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||
|
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void
|
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md_assemble (op)
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||
char *op;
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||
{
|
||
char *param, *thisfrag;
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||
char c;
|
||
struct m88k_opcode *format;
|
||
struct m88k_insn insn;
|
||
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||
assert (op);
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||
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||
/* Skip over instruction to find parameters. */
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for (param = op; *param != 0 && !ISSPACE (*param); param++)
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||
;
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||
c = *param;
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*param++ = '\0';
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||
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/* Try to find the instruction in the hash table. */
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if ((format = (struct m88k_opcode *) hash_find (op_hash, op)) == NULL)
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{
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as_bad (_("Invalid mnemonic '%s'"), op);
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return;
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||
}
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||
|
||
/* Try parsing this instruction into insn. */
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||
insn.exp.X_add_symbol = 0;
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||
insn.exp.X_op_symbol = 0;
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insn.exp.X_add_number = 0;
|
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insn.exp.X_op = O_illegal;
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||
insn.reloc = NO_RELOC;
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||
|
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while (!calcop (format, param, &insn))
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{
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||
/* If it doesn't parse try the next instruction. */
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||
if (!strcmp (format[0].name, format[1].name))
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format++;
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else
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||
{
|
||
as_fatal (_("Parameter syntax error"));
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||
return;
|
||
}
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||
}
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||
|
||
/* Grow the current frag and plop in the opcode. */
|
||
thisfrag = frag_more (4);
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md_number_to_chars (thisfrag, insn.opcode, 4);
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||
|
||
/* If this instruction requires labels mark it for later. */
|
||
switch (insn.reloc)
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||
{
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||
case NO_RELOC:
|
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break;
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||
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||
case RELOC_LO16:
|
||
case RELOC_HI16:
|
||
fix_new_exp (frag_now,
|
||
thisfrag - frag_now->fr_literal + 2,
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||
2,
|
||
&insn.exp,
|
||
0,
|
||
insn.reloc);
|
||
break;
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||
|
||
case RELOC_IW16:
|
||
fix_new_exp (frag_now,
|
||
thisfrag - frag_now->fr_literal,
|
||
4,
|
||
&insn.exp,
|
||
0,
|
||
insn.reloc);
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||
break;
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||
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||
case RELOC_PC16:
|
||
fix_new_exp (frag_now,
|
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thisfrag - frag_now->fr_literal + 2,
|
||
2,
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||
&insn.exp,
|
||
1,
|
||
insn.reloc);
|
||
break;
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||
|
||
case RELOC_PC26:
|
||
fix_new_exp (frag_now,
|
||
thisfrag - frag_now->fr_literal,
|
||
4,
|
||
&insn.exp,
|
||
1,
|
||
insn.reloc);
|
||
break;
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||
|
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default:
|
||
as_fatal (_("Unknown relocation type"));
|
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break;
|
||
}
|
||
}
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|
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static int
|
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calcop (format, param, insn)
|
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struct m88k_opcode *format;
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||
char *param;
|
||
struct m88k_insn *insn;
|
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{
|
||
char *fmt = format->op_spec;
|
||
int f;
|
||
unsigned val;
|
||
unsigned opcode;
|
||
unsigned int reg_prefix = 'r';
|
||
|
||
insn->opcode = format->opcode;
|
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opcode = 0;
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||
|
||
for (;;)
|
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{
|
||
if (param == 0)
|
||
return 0;
|
||
f = *fmt++;
|
||
switch (f)
|
||
{
|
||
case 0:
|
||
insn->opcode |= opcode;
|
||
return (*param == 0 || *param == '\n');
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||
|
||
default:
|
||
if (f != *param++)
|
||
return 0;
|
||
break;
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||
|
||
case 'd':
|
||
param = get_reg (param, &val, reg_prefix);
|
||
reg_prefix = 'r';
|
||
opcode |= val << 21;
|
||
break;
|
||
|
||
case 'o':
|
||
param = get_o6 (param, &val);
|
||
opcode |= ((val >> 2) << 7);
|
||
break;
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||
|
||
case 'x':
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||
reg_prefix = 'x';
|
||
break;
|
||
|
||
case '1':
|
||
param = get_reg (param, &val, reg_prefix);
|
||
reg_prefix = 'r';
|
||
opcode |= val << 16;
|
||
break;
|
||
|
||
case '2':
|
||
param = get_reg (param, &val, reg_prefix);
|
||
reg_prefix = 'r';
|
||
opcode |= val;
|
||
break;
|
||
|
||
case '3':
|
||
param = get_reg (param, &val, 'r');
|
||
opcode |= (val << 16) | val;
|
||
break;
|
||
|
||
case 'I':
|
||
param = get_imm16 (param, insn);
|
||
break;
|
||
|
||
case 'b':
|
||
param = get_bf (param, &val);
|
||
opcode |= val;
|
||
break;
|
||
|
||
case 'p':
|
||
param = get_pcr (param, insn, RELOC_PC16);
|
||
break;
|
||
|
||
case 'P':
|
||
param = get_pcr (param, insn, RELOC_PC26);
|
||
break;
|
||
|
||
case 'B':
|
||
param = get_cmp (param, &val);
|
||
opcode |= val;
|
||
break;
|
||
|
||
case 'M':
|
||
param = get_cnd (param, &val);
|
||
opcode |= val;
|
||
break;
|
||
|
||
case 'c':
|
||
param = get_cr (param, &val);
|
||
opcode |= val << 5;
|
||
break;
|
||
|
||
case 'f':
|
||
param = get_fcr (param, &val);
|
||
opcode |= val << 5;
|
||
break;
|
||
|
||
case 'V':
|
||
param = get_vec9 (param, &val);
|
||
opcode |= val;
|
||
break;
|
||
|
||
case '?':
|
||
/* Having this here repeats the warning somtimes.
|
||
But can't we stand that? */
|
||
as_warn (_("Use of obsolete instruction"));
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
static char *
|
||
match_name (param, assoc_tab, valp)
|
||
char *param;
|
||
struct field_val_assoc *assoc_tab;
|
||
unsigned *valp;
|
||
{
|
||
int i;
|
||
char *name;
|
||
int name_len;
|
||
|
||
for (i = 0;; i++)
|
||
{
|
||
name = assoc_tab[i].name;
|
||
if (name == NULL)
|
||
return NULL;
|
||
name_len = strlen (name);
|
||
if (!strncmp (param, name, name_len))
|
||
{
|
||
*valp = assoc_tab[i].val;
|
||
return param + name_len;
|
||
}
|
||
}
|
||
}
|
||
|
||
static char *
|
||
get_reg (param, regnop, reg_prefix)
|
||
char *param;
|
||
unsigned *regnop;
|
||
unsigned int reg_prefix;
|
||
{
|
||
unsigned c;
|
||
unsigned regno;
|
||
|
||
c = *param++;
|
||
if (c == reg_prefix)
|
||
{
|
||
regno = *param++ - '0';
|
||
if (regno < 10)
|
||
{
|
||
if (regno == 0)
|
||
{
|
||
*regnop = 0;
|
||
return param;
|
||
}
|
||
c = *param - '0';
|
||
if (c < 10)
|
||
{
|
||
regno = regno * 10 + c;
|
||
if (c < 32)
|
||
{
|
||
*regnop = regno;
|
||
return param + 1;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
*regnop = regno;
|
||
return param;
|
||
}
|
||
}
|
||
return NULL;
|
||
}
|
||
else if (c == 's' && param[0] == 'p')
|
||
{
|
||
*regnop = 31;
|
||
return param + 1;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
static char *
|
||
get_imm16 (param, insn)
|
||
char *param;
|
||
struct m88k_insn *insn;
|
||
{
|
||
enum reloc_type reloc = NO_RELOC;
|
||
unsigned int val;
|
||
char *save_ptr;
|
||
|
||
if (!strncmp (param, "hi16", 4) && !ISALNUM (param[4]))
|
||
{
|
||
reloc = RELOC_HI16;
|
||
param += 4;
|
||
}
|
||
else if (!strncmp (param, "lo16", 4) && !ISALNUM (param[4]))
|
||
{
|
||
reloc = RELOC_LO16;
|
||
param += 4;
|
||
}
|
||
else if (!strncmp (param, "iw16", 4) && !ISALNUM (param[4]))
|
||
{
|
||
reloc = RELOC_IW16;
|
||
param += 4;
|
||
}
|
||
|
||
save_ptr = input_line_pointer;
|
||
input_line_pointer = param;
|
||
expression (&insn->exp);
|
||
param = input_line_pointer;
|
||
input_line_pointer = save_ptr;
|
||
|
||
val = insn->exp.X_add_number;
|
||
|
||
if (insn->exp.X_op == O_constant)
|
||
{
|
||
/* Insert the value now, and reset reloc to NO_RELOC. */
|
||
if (reloc == NO_RELOC)
|
||
{
|
||
/* Warn about too big expressions if not surrounded by xx16. */
|
||
if (val > 0xffff)
|
||
as_warn (_("Expression truncated to 16 bits"));
|
||
}
|
||
|
||
if (reloc == RELOC_HI16)
|
||
val >>= 16;
|
||
|
||
insn->opcode |= val & 0xffff;
|
||
reloc = NO_RELOC;
|
||
}
|
||
else if (reloc == NO_RELOC)
|
||
/* We accept a symbol even without lo16, hi16, etc, and assume
|
||
lo16 was intended. */
|
||
reloc = RELOC_LO16;
|
||
|
||
insn->reloc = reloc;
|
||
|
||
return param;
|
||
}
|
||
|
||
static char *
|
||
get_pcr (param, insn, reloc)
|
||
char *param;
|
||
struct m88k_insn *insn;
|
||
enum reloc_type reloc;
|
||
{
|
||
char *saveptr, *saveparam;
|
||
|
||
saveptr = input_line_pointer;
|
||
input_line_pointer = param;
|
||
|
||
expression (&insn->exp);
|
||
|
||
saveparam = input_line_pointer;
|
||
input_line_pointer = saveptr;
|
||
|
||
/* Botch: We should relocate now if O_constant. */
|
||
insn->reloc = reloc;
|
||
|
||
return saveparam;
|
||
}
|
||
|
||
static char *
|
||
get_cmp (param, valp)
|
||
char *param;
|
||
unsigned *valp;
|
||
{
|
||
unsigned int val;
|
||
char *save_ptr;
|
||
|
||
save_ptr = param;
|
||
|
||
param = match_name (param, cmpslot, valp);
|
||
val = *valp;
|
||
|
||
if (param == NULL)
|
||
{
|
||
param = save_ptr;
|
||
|
||
save_ptr = input_line_pointer;
|
||
input_line_pointer = param;
|
||
val = get_absolute_expression ();
|
||
param = input_line_pointer;
|
||
input_line_pointer = save_ptr;
|
||
|
||
if (val >= 32)
|
||
{
|
||
as_warn (_("Expression truncated to 5 bits"));
|
||
val %= 32;
|
||
}
|
||
}
|
||
|
||
*valp = val << 21;
|
||
return param;
|
||
}
|
||
|
||
static char *
|
||
get_cnd (param, valp)
|
||
char *param;
|
||
unsigned *valp;
|
||
{
|
||
unsigned int val;
|
||
|
||
if (ISDIGIT (*param))
|
||
{
|
||
param = getval (param, &val);
|
||
|
||
if (val >= 32)
|
||
{
|
||
as_warn (_("Expression truncated to 5 bits"));
|
||
val %= 32;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
param[0] = TOLOWER (param[0]);
|
||
param[1] = TOLOWER (param[1]);
|
||
|
||
param = match_name (param, cndmsk, valp);
|
||
|
||
if (param == NULL)
|
||
return NULL;
|
||
|
||
val = *valp;
|
||
}
|
||
|
||
*valp = val << 21;
|
||
return param;
|
||
}
|
||
|
||
static char *
|
||
get_bf2 (param, bc)
|
||
char *param;
|
||
int bc;
|
||
{
|
||
int depth = 0;
|
||
int c;
|
||
|
||
for (;;)
|
||
{
|
||
c = *param;
|
||
if (c == 0)
|
||
return param;
|
||
else if (c == '(')
|
||
depth++;
|
||
else if (c == ')')
|
||
depth--;
|
||
else if (c == bc && depth <= 0)
|
||
return param;
|
||
param++;
|
||
}
|
||
}
|
||
|
||
static char *
|
||
get_bf_offset_expression (param, offsetp)
|
||
char *param;
|
||
unsigned *offsetp;
|
||
{
|
||
unsigned offset;
|
||
|
||
if (ISALPHA (param[0]))
|
||
{
|
||
param[0] = TOLOWER (param[0]);
|
||
param[1] = TOLOWER (param[1]);
|
||
|
||
param = match_name (param, cmpslot, offsetp);
|
||
|
||
return param;
|
||
}
|
||
else
|
||
{
|
||
input_line_pointer = param;
|
||
offset = get_absolute_expression ();
|
||
param = input_line_pointer;
|
||
}
|
||
|
||
*offsetp = offset;
|
||
return param;
|
||
}
|
||
|
||
static char *
|
||
get_bf (param, valp)
|
||
char *param;
|
||
unsigned *valp;
|
||
{
|
||
unsigned offset = 0;
|
||
unsigned width = 0;
|
||
char *xp;
|
||
char *save_ptr;
|
||
|
||
xp = get_bf2 (param, '<');
|
||
|
||
save_ptr = input_line_pointer;
|
||
input_line_pointer = param;
|
||
if (*xp == 0)
|
||
{
|
||
/* We did not find '<'. We have an offset (width implicitly 32). */
|
||
param = get_bf_offset_expression (param, &offset);
|
||
input_line_pointer = save_ptr;
|
||
if (param == NULL)
|
||
return NULL;
|
||
}
|
||
else
|
||
{
|
||
*xp++ = 0; /* Overwrite the '<' */
|
||
param = get_bf2 (xp, '>');
|
||
if (*param == 0)
|
||
return NULL;
|
||
*param++ = 0; /* Overwrite the '>' */
|
||
|
||
width = get_absolute_expression ();
|
||
xp = get_bf_offset_expression (xp, &offset);
|
||
input_line_pointer = save_ptr;
|
||
|
||
if (xp + 1 != param)
|
||
return NULL;
|
||
}
|
||
|
||
*valp = ((width % 32) << 5) | (offset % 32);
|
||
|
||
return param;
|
||
}
|
||
|
||
static char *
|
||
get_cr (param, regnop)
|
||
char *param;
|
||
unsigned *regnop;
|
||
{
|
||
unsigned regno;
|
||
unsigned c;
|
||
|
||
if (!strncmp (param, "cr", 2))
|
||
{
|
||
param += 2;
|
||
|
||
regno = *param++ - '0';
|
||
if (regno < 10)
|
||
{
|
||
if (regno == 0)
|
||
{
|
||
*regnop = 0;
|
||
return param;
|
||
}
|
||
c = *param - '0';
|
||
if (c < 10)
|
||
{
|
||
regno = regno * 10 + c;
|
||
if (c < 64)
|
||
{
|
||
*regnop = regno;
|
||
return param + 1;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
*regnop = regno;
|
||
return param;
|
||
}
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
param = match_name (param, cr_regs, regnop);
|
||
|
||
return param;
|
||
}
|
||
|
||
static char *
|
||
get_fcr (param, regnop)
|
||
char *param;
|
||
unsigned *regnop;
|
||
{
|
||
unsigned regno;
|
||
unsigned c;
|
||
|
||
if (!strncmp (param, "fcr", 3))
|
||
{
|
||
param += 3;
|
||
|
||
regno = *param++ - '0';
|
||
if (regno < 10)
|
||
{
|
||
if (regno == 0)
|
||
{
|
||
*regnop = 0;
|
||
return param;
|
||
}
|
||
c = *param - '0';
|
||
if (c < 10)
|
||
{
|
||
regno = regno * 10 + c;
|
||
if (c < 64)
|
||
{
|
||
*regnop = regno;
|
||
return param + 1;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
*regnop = regno;
|
||
return param;
|
||
}
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
param = match_name (param, fcr_regs, regnop);
|
||
|
||
return param;
|
||
}
|
||
|
||
static char *
|
||
get_vec9 (param, valp)
|
||
char *param;
|
||
unsigned *valp;
|
||
{
|
||
unsigned val;
|
||
char *save_ptr;
|
||
|
||
save_ptr = input_line_pointer;
|
||
input_line_pointer = param;
|
||
val = get_absolute_expression ();
|
||
param = input_line_pointer;
|
||
input_line_pointer = save_ptr;
|
||
|
||
if (val >= 1 << 9)
|
||
as_warn (_("Expression truncated to 9 bits"));
|
||
|
||
*valp = val % (1 << 9);
|
||
|
||
return param;
|
||
}
|
||
|
||
static char *
|
||
get_o6 (param, valp)
|
||
char *param;
|
||
unsigned *valp;
|
||
{
|
||
unsigned val;
|
||
char *save_ptr;
|
||
|
||
save_ptr = input_line_pointer;
|
||
input_line_pointer = param;
|
||
val = get_absolute_expression ();
|
||
param = input_line_pointer;
|
||
input_line_pointer = save_ptr;
|
||
|
||
if (val & 0x3)
|
||
as_warn (_("Removed lower 2 bits of expression"));
|
||
|
||
*valp = val;
|
||
|
||
return (param);
|
||
}
|
||
|
||
#define hexval(z) \
|
||
(ISDIGIT (z) ? (z) - '0' : \
|
||
ISLOWER (z) ? (z) - 'a' + 10 : \
|
||
ISUPPER (z) ? (z) - 'A' + 10 : (unsigned) -1)
|
||
|
||
static char *
|
||
getval (param, valp)
|
||
char *param;
|
||
unsigned int *valp;
|
||
{
|
||
unsigned int val = 0;
|
||
unsigned int c;
|
||
|
||
c = *param++;
|
||
if (c == '0')
|
||
{
|
||
c = *param++;
|
||
if (c == 'x' || c == 'X')
|
||
{
|
||
c = *param++;
|
||
c = hexval (c);
|
||
while (c < 16)
|
||
{
|
||
val = val * 16 + c;
|
||
c = *param++;
|
||
c = hexval (c);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
c -= '0';
|
||
while (c < 8)
|
||
{
|
||
val = val * 8 + c;
|
||
c = *param++ - '0';
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
c -= '0';
|
||
while (c < 10)
|
||
{
|
||
val = val * 10 + c;
|
||
c = *param++ - '0';
|
||
}
|
||
}
|
||
|
||
*valp = val;
|
||
return param - 1;
|
||
}
|
||
|
||
void
|
||
md_number_to_chars (buf, val, nbytes)
|
||
char *buf;
|
||
valueT val;
|
||
int nbytes;
|
||
{
|
||
number_to_chars_bigendian (buf, val, nbytes);
|
||
}
|
||
|
||
#define MAX_LITTLENUMS 6
|
||
|
||
/* Turn a string in input_line_pointer into a floating point constant of type
|
||
type, and store the appropriate bytes in *litP. The number of LITTLENUMS
|
||
emitted is stored in *sizeP . An error message is returned, or NULL on OK.
|
||
*/
|
||
char *
|
||
md_atof (type, litP, sizeP)
|
||
char type;
|
||
char *litP;
|
||
int *sizeP;
|
||
{
|
||
int prec;
|
||
LITTLENUM_TYPE words[MAX_LITTLENUMS];
|
||
LITTLENUM_TYPE *wordP;
|
||
char *t;
|
||
|
||
switch (type)
|
||
{
|
||
case 'f':
|
||
case 'F':
|
||
case 's':
|
||
case 'S':
|
||
prec = 2;
|
||
break;
|
||
|
||
case 'd':
|
||
case 'D':
|
||
case 'r':
|
||
case 'R':
|
||
prec = 4;
|
||
break;
|
||
|
||
case 'x':
|
||
case 'X':
|
||
prec = 6;
|
||
break;
|
||
|
||
case 'p':
|
||
case 'P':
|
||
prec = 6;
|
||
break;
|
||
|
||
default:
|
||
*sizeP = 0;
|
||
return _("Bad call to MD_ATOF()");
|
||
}
|
||
t = atof_ieee (input_line_pointer, type, words);
|
||
if (t)
|
||
input_line_pointer = t;
|
||
|
||
*sizeP = prec * sizeof (LITTLENUM_TYPE);
|
||
for (wordP = words; prec--;)
|
||
{
|
||
md_number_to_chars (litP, (long) (*wordP++), sizeof (LITTLENUM_TYPE));
|
||
litP += sizeof (LITTLENUM_TYPE);
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
int md_short_jump_size = 4;
|
||
|
||
void
|
||
md_create_short_jump (ptr, from_addr, to_addr, frag, to_symbol)
|
||
char *ptr;
|
||
addressT from_addr ATTRIBUTE_UNUSED;
|
||
addressT to_addr ATTRIBUTE_UNUSED;
|
||
fragS *frag;
|
||
symbolS *to_symbol;
|
||
{
|
||
ptr[0] = (char) 0xc0;
|
||
ptr[1] = 0x00;
|
||
ptr[2] = 0x00;
|
||
ptr[3] = 0x00;
|
||
fix_new (frag,
|
||
ptr - frag->fr_literal,
|
||
4,
|
||
to_symbol,
|
||
(offsetT) 0,
|
||
0,
|
||
RELOC_PC26); /* Botch: Shouldn't this be RELOC_PC16? */
|
||
}
|
||
|
||
int md_long_jump_size = 4;
|
||
|
||
void
|
||
md_create_long_jump (ptr, from_addr, to_addr, frag, to_symbol)
|
||
char *ptr;
|
||
addressT from_addr ATTRIBUTE_UNUSED;
|
||
addressT to_addr ATTRIBUTE_UNUSED;
|
||
fragS *frag;
|
||
symbolS *to_symbol;
|
||
{
|
||
ptr[0] = (char) 0xc0;
|
||
ptr[1] = 0x00;
|
||
ptr[2] = 0x00;
|
||
ptr[3] = 0x00;
|
||
fix_new (frag,
|
||
ptr - frag->fr_literal,
|
||
4,
|
||
to_symbol,
|
||
(offsetT) 0,
|
||
0,
|
||
RELOC_PC26);
|
||
}
|
||
|
||
int
|
||
md_estimate_size_before_relax (fragP, segment_type)
|
||
fragS *fragP ATTRIBUTE_UNUSED;
|
||
segT segment_type ATTRIBUTE_UNUSED;
|
||
{
|
||
as_fatal (_("Relaxation should never occur"));
|
||
return (-1);
|
||
}
|
||
|
||
#ifdef M88KCOFF
|
||
|
||
/* These functions are needed if we are linking with obj-coffbfd.c.
|
||
That file may be replaced by a more BFD oriented version at some
|
||
point. If that happens, these functions should be reexamined.
|
||
|
||
Ian Lance Taylor, Cygnus Support, 13 July 1993. */
|
||
|
||
/* Given a fixS structure (created by a call to fix_new, above),
|
||
return the BFD relocation type to use for it. */
|
||
|
||
short
|
||
tc_coff_fix2rtype (fixp)
|
||
fixS *fixp;
|
||
{
|
||
switch (fixp->fx_r_type)
|
||
{
|
||
case RELOC_LO16:
|
||
return R_LVRT16;
|
||
case RELOC_HI16:
|
||
return R_HVRT16;
|
||
case RELOC_PC16:
|
||
return R_PCR16L;
|
||
case RELOC_PC26:
|
||
return R_PCR26L;
|
||
case RELOC_32:
|
||
return R_VRT32;
|
||
case RELOC_IW16:
|
||
return R_VRT16;
|
||
default:
|
||
abort ();
|
||
}
|
||
}
|
||
|
||
/* Apply a fixS to the object file. Since COFF does not use addends
|
||
in relocs, the addend is actually stored directly in the object
|
||
file itself. */
|
||
|
||
void
|
||
md_apply_fix3 (fixP, valP, seg)
|
||
fixS *fixP;
|
||
valueT * valP;
|
||
segT seg ATTRIBUTE_UNUSED;
|
||
{
|
||
long val = * (long *) valP;
|
||
char *buf;
|
||
|
||
buf = fixP->fx_frag->fr_literal + fixP->fx_where;
|
||
fixP->fx_offset = 0;
|
||
|
||
switch (fixP->fx_r_type)
|
||
{
|
||
case RELOC_IW16:
|
||
fixP->fx_offset = val >> 16;
|
||
buf[2] = val >> 8;
|
||
buf[3] = val;
|
||
break;
|
||
|
||
case RELOC_LO16:
|
||
fixP->fx_offset = val >> 16;
|
||
buf[0] = val >> 8;
|
||
buf[1] = val;
|
||
break;
|
||
|
||
case RELOC_HI16:
|
||
fixP->fx_offset = val >> 16;
|
||
buf[0] = val >> 8;
|
||
buf[1] = val;
|
||
break;
|
||
|
||
case RELOC_PC16:
|
||
buf[0] = val >> 10;
|
||
buf[1] = val >> 2;
|
||
break;
|
||
|
||
case RELOC_PC26:
|
||
buf[0] |= (val >> 26) & 0x03;
|
||
buf[1] = val >> 18;
|
||
buf[2] = val >> 10;
|
||
buf[3] = val >> 2;
|
||
break;
|
||
|
||
case RELOC_32:
|
||
buf[0] = val >> 24;
|
||
buf[1] = val >> 16;
|
||
buf[2] = val >> 8;
|
||
buf[3] = val;
|
||
break;
|
||
|
||
default:
|
||
abort ();
|
||
}
|
||
|
||
if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0)
|
||
fixP->fx_done = 1;
|
||
}
|
||
|
||
/* Where a PC relative offset is calculated from. On the m88k they
|
||
are calculated from just after the instruction. */
|
||
|
||
long
|
||
md_pcrel_from (fixp)
|
||
fixS *fixp;
|
||
{
|
||
switch (fixp->fx_r_type)
|
||
{
|
||
case RELOC_PC16:
|
||
return fixp->fx_frag->fr_address + fixp->fx_where - 2;
|
||
case RELOC_PC26:
|
||
return fixp->fx_frag->fr_address + fixp->fx_where;
|
||
default:
|
||
abort ();
|
||
}
|
||
/*NOTREACHED*/
|
||
}
|
||
|
||
/* Fill in rs_align_code fragments. */
|
||
|
||
void
|
||
m88k_handle_align (fragp)
|
||
fragS *fragp;
|
||
{
|
||
static const unsigned char nop_pattern[] = { 0xf4, 0x00, 0x58, 0x00 };
|
||
|
||
int bytes;
|
||
char *p;
|
||
|
||
if (fragp->fr_type != rs_align_code)
|
||
return;
|
||
|
||
bytes = fragp->fr_next->fr_address - fragp->fr_address - fragp->fr_fix;
|
||
p = fragp->fr_literal + fragp->fr_fix;
|
||
|
||
if (bytes & 3)
|
||
{
|
||
int fix = bytes & 3;
|
||
memset (p, 0, fix);
|
||
p += fix;
|
||
bytes -= fix;
|
||
fragp->fr_fix += fix;
|
||
}
|
||
|
||
memcpy (p, nop_pattern, 4);
|
||
fragp->fr_var = 4;
|
||
}
|
||
|
||
#endif /* M88KCOFF */
|