1453 lines
27 KiB
C
1453 lines
27 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 (C) 1989, 90, 91, 92, 93, 94, 95, 96, 1997
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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
|
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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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
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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||
GNU General Public License for more details.
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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 <ctype.h>
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#include "as.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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||
{
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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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{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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struct field_val_assoc cndmsk[] =
|
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{
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{"gt0", 1},
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{"eq0", 2},
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{"ge0", 3},
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{"lt0", 12},
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{"ne0", 13},
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{"le0", 14},
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{NULL, 0},
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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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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));
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static char *get_cr PARAMS ((char *param, unsigned *regnop));
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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));
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static char *get_reg PARAMS ((char *param, unsigned *regnop, int reg_prefix));
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static char *get_vec9 PARAMS ((char *param, unsigned *valp));
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||
static char *getval PARAMS ((char *param, unsigned int *valp));
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||
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static char *get_pcr PARAMS ((char *param, struct m88k_insn *insn,
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enum reloc_type reloc));
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static int calcop PARAMS ((struct m88k_opcode *format,
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char *param, struct m88k_insn *insn));
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extern char *myname;
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static struct hash_control *op_hash = NULL;
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||
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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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||
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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[] = "";
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||
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/* 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 */
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/* 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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extern void float_cons (), cons (), s_globl (), s_space (),
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s_set (), s_lcomm ();
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const pseudo_typeS md_pseudo_table[] =
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||
{
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{"align", s_align_bytes, 4},
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{"def", s_set, 0},
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{"dfloat", float_cons, 'd'},
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{"ffloat", float_cons, 'f'},
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{"global", s_globl, 0},
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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},
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/* 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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{0}
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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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/* initialize hash table */
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||
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op_hash = hash_new ();
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/* loop until you see the end of the list */
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while (*m88k_opcodes[i].name)
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{
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char *name = m88k_opcodes[i].name;
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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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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 */
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||
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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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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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||
};
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||
size_t md_longopts_size = sizeof(md_longopts);
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||
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||
int
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md_parse_option (c, arg)
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int c;
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||
char *arg;
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||
{
|
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return 0;
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||
}
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||
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void
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||
md_show_usage (stream)
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FILE *stream;
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||
{
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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;
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||
struct m88k_insn insn;
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||
|
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assert (op);
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||
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/* skip over instruction to find parameters */
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||
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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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||
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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;
|
||
insn.exp.X_add_number = 0;
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||
insn.exp.X_op = O_illegal;
|
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insn.reloc = NO_RELOC;
|
||
|
||
while (!calcop (format, param, &insn))
|
||
{
|
||
/* if it doesn't parse try the next instruction */
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||
|
||
if (!strcmp (format[0].name, format[1].name))
|
||
format++;
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||
else
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||
{
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||
as_fatal (_("Parameter syntax error"));
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||
return;
|
||
}
|
||
}
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||
|
||
/* grow the current frag and plop in the opcode */
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||
|
||
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 */
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||
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||
switch (insn.reloc)
|
||
{
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||
case NO_RELOC:
|
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break;
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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,
|
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&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);
|
||
break;
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||
|
||
case RELOC_PC16:
|
||
fix_new_exp (frag_now,
|
||
thisfrag - frag_now->fr_literal + 2,
|
||
2,
|
||
&insn.exp,
|
||
1,
|
||
insn.reloc);
|
||
break;
|
||
|
||
case RELOC_PC26:
|
||
fix_new_exp (frag_now,
|
||
thisfrag - frag_now->fr_literal,
|
||
4,
|
||
&insn.exp,
|
||
1,
|
||
insn.reloc);
|
||
break;
|
||
|
||
default:
|
||
as_fatal (_("Unknown relocation type"));
|
||
break;
|
||
}
|
||
}
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||
|
||
static int
|
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calcop (format, param, insn)
|
||
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;
|
||
int reg_prefix = 'r';
|
||
|
||
insn->opcode = format->opcode;
|
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opcode = 0;
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||
|
||
for (;;)
|
||
{
|
||
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;
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||
break;
|
||
|
||
case 'd':
|
||
param = get_reg (param, &val, reg_prefix);
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||
reg_prefix = 'r';
|
||
opcode |= val << 21;
|
||
break;
|
||
|
||
case 'o':
|
||
param = get_o6 (param, &val);
|
||
opcode |= ((val >> 2) << 7);
|
||
break;
|
||
|
||
case 'x':
|
||
reg_prefix = 'x';
|
||
break;
|
||
|
||
case '1':
|
||
param = get_reg (param, &val, reg_prefix);
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||
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;
|
||
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
|
||
{
|
||
if (isupper (*param))
|
||
*param = tolower (*param);
|
||
|
||
if (isupper (param[1]))
|
||
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]))
|
||
{
|
||
if (isupper (param[0]))
|
||
param[0] = tolower (param[0]);
|
||
if (isupper (param[1]))
|
||
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 : -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);
|
||
}
|
||
|
||
#if 0
|
||
|
||
/* This routine is never called. What is it for?
|
||
Ian Taylor, Cygnus Support 13 Jul 1993 */
|
||
|
||
void
|
||
md_number_to_imm (buf, val, nbytes, fixP, seg_type)
|
||
unsigned char *buf;
|
||
unsigned int val;
|
||
int nbytes;
|
||
fixS *fixP;
|
||
int seg_type;
|
||
{
|
||
if (seg_type != N_TEXT || fixP->fx_r_type == NO_RELOC)
|
||
{
|
||
switch (nbytes)
|
||
{
|
||
case 4:
|
||
*buf++ = val >> 24;
|
||
*buf++ = val >> 16;
|
||
case 2:
|
||
*buf++ = val >> 8;
|
||
case 1:
|
||
*buf = val;
|
||
break;
|
||
|
||
default:
|
||
abort ();
|
||
}
|
||
return;
|
||
}
|
||
|
||
switch (fixP->fx_r_type)
|
||
{
|
||
case RELOC_IW16:
|
||
buf[2] = val >> 8;
|
||
buf[3] = val;
|
||
break;
|
||
|
||
case RELOC_LO16:
|
||
buf[0] = val >> 8;
|
||
buf[1] = val;
|
||
break;
|
||
|
||
case RELOC_HI16:
|
||
buf[0] = val >> 24;
|
||
buf[1] = val >> 16;
|
||
break;
|
||
|
||
case RELOC_PC16:
|
||
val += 4;
|
||
buf[0] = val >> 10;
|
||
buf[1] = val >> 2;
|
||
break;
|
||
|
||
case RELOC_PC26:
|
||
val += 4;
|
||
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:
|
||
as_fatal (_("Bad relocation type"));
|
||
break;
|
||
}
|
||
}
|
||
|
||
#endif /* 0 */
|
||
|
||
void
|
||
md_number_to_disp (buf, val, nbytes)
|
||
char *buf;
|
||
int val;
|
||
int nbytes;
|
||
{
|
||
as_fatal (_("md_number_to_disp not defined"));
|
||
md_number_to_chars (buf, val, nbytes);
|
||
}
|
||
|
||
void
|
||
md_number_to_field (buf, val, nbytes)
|
||
char *buf;
|
||
int val;
|
||
int nbytes;
|
||
{
|
||
as_fatal (_("md_number_to_field not defined"));
|
||
md_number_to_chars (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, to_addr;
|
||
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, to_addr;
|
||
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;
|
||
segT segment_type;
|
||
{
|
||
as_fatal (_("Relaxation should never occur"));
|
||
return (-1);
|
||
}
|
||
|
||
#if 0
|
||
|
||
/* As far as I can tell, this routine is never called. What is it
|
||
doing here?
|
||
Ian Taylor, Cygnus Support 13 Jul 1993 */
|
||
|
||
|
||
/*
|
||
* Risc relocations are completely different, so it needs
|
||
* this machine dependent routine to emit them.
|
||
*/
|
||
void
|
||
emit_relocations (fixP, segment_address_in_file)
|
||
fixS *fixP;
|
||
relax_addressT segment_address_in_file;
|
||
{
|
||
struct reloc_info_m88k ri;
|
||
symbolS *symbolP;
|
||
extern char *next_object_file_charP;
|
||
|
||
bzero ((char *) &ri, sizeof (ri));
|
||
for (; fixP; fixP = fixP->fx_next)
|
||
{
|
||
if (fixP->fx_r_type >= NO_RELOC)
|
||
{
|
||
fprintf (stderr, "fixP->fx_r_type = %d\n", fixP->fx_r_type);
|
||
abort ();
|
||
}
|
||
|
||
if ((symbolP = fixP->fx_addsy) != NULL)
|
||
{
|
||
ri.r_address = fixP->fx_frag->fr_address +
|
||
fixP->fx_where - segment_address_in_file;
|
||
if ((symbolP->sy_type & N_TYPE) == N_UNDF)
|
||
{
|
||
ri.r_extern = 1;
|
||
ri.r_symbolnum = symbolP->sy_number;
|
||
}
|
||
else
|
||
{
|
||
ri.r_extern = 0;
|
||
ri.r_symbolnum = symbolP->sy_type & N_TYPE;
|
||
}
|
||
if (symbolP && symbolP->sy_frag)
|
||
{
|
||
ri.r_addend = symbolP->sy_frag->fr_address;
|
||
}
|
||
ri.r_type = fixP->fx_r_type;
|
||
if (fixP->fx_pcrel)
|
||
{
|
||
ri.r_addend -= ri.r_address;
|
||
}
|
||
else
|
||
{
|
||
ri.r_addend = fixP->fx_addnumber;
|
||
}
|
||
|
||
append (&next_object_file_charP, (char *) &ri, sizeof (ri));
|
||
}
|
||
}
|
||
}
|
||
|
||
#endif /* 0 */
|
||
|
||
#if 0
|
||
|
||
/* This routine can be subsumed by s_lcomm in read.c.
|
||
Ian Taylor, Cygnus Support 13 Jul 1993 */
|
||
|
||
|
||
static void
|
||
s_bss ()
|
||
{
|
||
char *name;
|
||
char c;
|
||
char *p;
|
||
int temp, bss_align;
|
||
symbolS *symbolP;
|
||
|
||
name = input_line_pointer;
|
||
c = get_symbol_end ();
|
||
p = input_line_pointer;
|
||
*p = c;
|
||
SKIP_WHITESPACE ();
|
||
if (*input_line_pointer != ',')
|
||
{
|
||
as_warn (_("Expected comma after name"));
|
||
ignore_rest_of_line ();
|
||
return;
|
||
}
|
||
input_line_pointer++;
|
||
if ((temp = get_absolute_expression ()) < 0)
|
||
{
|
||
as_warn (_("BSS length (%d.) <0! Ignored."), temp);
|
||
ignore_rest_of_line ();
|
||
return;
|
||
}
|
||
*p = 0;
|
||
symbolP = symbol_find_or_make (name);
|
||
*p = c;
|
||
if (*input_line_pointer == ',')
|
||
{
|
||
input_line_pointer++;
|
||
bss_align = get_absolute_expression ();
|
||
}
|
||
else
|
||
bss_align = 0;
|
||
|
||
if (!S_IS_DEFINED(symbolP)
|
||
|| S_GET_SEGMENT(symbolP) == SEG_BSS)
|
||
{
|
||
if (! need_pass_2)
|
||
{
|
||
char *p;
|
||
segT current_seg = now_seg;
|
||
subsegT current_subseg = now_subseg;
|
||
|
||
subseg_set (SEG_BSS, 1); /* switch to bss */
|
||
|
||
if (bss_align)
|
||
frag_align (bss_align, 0, 0);
|
||
|
||
/* detach from old frag */
|
||
if (symbolP->sy_type == N_BSS && symbolP->sy_frag != NULL)
|
||
symbolP->sy_frag->fr_symbol = NULL;
|
||
|
||
symbolP->sy_frag = frag_now;
|
||
p = frag_var (rs_org, 1, 1, (relax_substateT)0, symbolP,
|
||
(offsetT) temp, (char *)0);
|
||
*p = 0;
|
||
S_SET_SEGMENT (symbolP, SEG_BSS);
|
||
|
||
subseg_set (current_seg, current_subseg);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
as_warn (_("Ignoring attempt to re-define symbol %s."), name);
|
||
}
|
||
|
||
while (!is_end_of_line[*input_line_pointer])
|
||
{
|
||
input_line_pointer++;
|
||
}
|
||
}
|
||
|
||
#endif /* 0 */
|
||
|
||
#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 rexamined.
|
||
|
||
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_fix (fixp, val)
|
||
fixS *fixp;
|
||
long val;
|
||
{
|
||
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 ();
|
||
}
|
||
}
|
||
|
||
/* 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*/
|
||
}
|
||
|
||
/* When we align the .init section, insert the correct NOP pattern. */
|
||
|
||
int
|
||
m88k_do_align (n, fill, max, len)
|
||
int n;
|
||
const char *fill;
|
||
int len;
|
||
int max;
|
||
{
|
||
if (fill == NULL
|
||
&& strcmp (obj_segment_name (now_seg), ".init") == 0)
|
||
{
|
||
static const unsigned char nop_pattern[] = { 0xf4, 0x00, 0x58, 0x00 };
|
||
frag_align_pattern (n, nop_pattern, sizeof (nop_pattern), max);
|
||
return 1;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
#endif /* M88KCOFF */
|