36d656a6cb
read.c, config/obj-ieee.c, config/obj-tcm88k.c: Not any of these places.
1295 lines
23 KiB
C
1295 lines
23 KiB
C
/* m88k.c -- Assembler for the Motorola 88000
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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, 1990, 1991 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 1, 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
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along with GAS; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include <ctype.h>
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#include "m88k-opcode.h"
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#include "as.h"
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#include "flonum.h"
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#include "md.h"
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#include "m88k.h"
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char *getval ();
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char *get_reg ();
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char *get_imm16 ();
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char *get_bf ();
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char *get_pcr ();
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char *get_cmp ();
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char *get_cnd ();
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char *get_cr ();
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char *get_fcr ();
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char *get_vec9 ();
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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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{NULL, 0},
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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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{"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},
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{"ou", 8},
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{"ls", 9},
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{"ib", 9},
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{"lo", 10},
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{"in", 10},
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{"hs", 11},
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{"ob", 11},
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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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extern char *myname;
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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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/* This is the number to put at the beginning of the a.out file */
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long omagic = OMAGIC;
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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[] = "";
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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_line (), s_space (),
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s_set (), s_lcomm ();
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static void s_file ();
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static void s_bss ();
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const pseudo_typeS md_pseudo_table[] =
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{
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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_bss, 0},
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{"ln", s_line, 0},
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{"string", stringer, 0},
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{"word", cons, 4},
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{"zero", s_space, 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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char *retval = NULL;
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unsigned int i = 0;
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/* initialize hash table */
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op_hash = hash_new ();
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if (op_hash == NULL)
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as_fatal ("Could not initialize hash table");
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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 && *retval != '\0')
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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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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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void
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md_parse_option (argP, cntP, vecP)
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char **argP;
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int *cntP;
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char ***vecP;
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{
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as_warn ("unknown option: -%s", *argP);
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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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{
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char *param, *thisfrag;
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struct m88k_opcode *format;
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struct m88k_insn insn;
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assert (op);
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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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if (*param != 0)
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*param++ = 0;
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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_fatal ("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_subtract_symbol = 0;
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insn.exp.X_add_number = 0;
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insn.exp.X_seg = 0;
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insn.reloc = NO_RELOC;
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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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{
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as_fatal ("Parameter syntax error");
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return;
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}
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}
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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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switch (insn.reloc)
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{
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case NO_RELOC:
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break;
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case RELOC_LO16:
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case RELOC_HI16:
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fix_new (frag_now,
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thisfrag - frag_now->fr_literal + 2,
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2,
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insn.exp.X_add_symbol,
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insn.exp.X_subtract_symbol,
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insn.exp.X_add_number,
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0,
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insn.reloc);
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break;
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case RELOC_IW16:
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fix_new (frag_now,
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thisfrag - frag_now->fr_literal,
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4,
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insn.exp.X_add_symbol,
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insn.exp.X_subtract_symbol,
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insn.exp.X_add_number,
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0,
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insn.reloc);
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break;
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case RELOC_PC16:
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fix_new (frag_now,
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thisfrag - frag_now->fr_literal + 2,
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2,
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insn.exp.X_add_symbol,
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insn.exp.X_subtract_symbol,
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insn.exp.X_add_number,
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1,
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insn.reloc);
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break;
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case RELOC_PC26:
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fix_new (frag_now,
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thisfrag - frag_now->fr_literal,
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4,
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insn.exp.X_add_symbol,
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insn.exp.X_subtract_symbol,
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insn.exp.X_add_number,
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1,
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insn.reloc);
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break;
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default:
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as_fatal ("Unknown relocation type");
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break;
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}
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}
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int
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calcop (format, param, insn)
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struct m88k_opcode *format;
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char *param;
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struct m88k_insn *insn;
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{
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char *fmt = format->op_spec;
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int f;
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unsigned val;
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unsigned opcode;
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insn->opcode = format->opcode;
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opcode = 0;
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for (;;)
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{
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if (param == 0)
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return 0;
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f = *fmt++;
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switch (f)
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{
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case 0:
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insn->opcode |= opcode;
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return *param == 0;
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default:
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if (f != *param++)
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return 0;
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break;
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case 'd':
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param = get_reg (param, &val);
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opcode |= val << 21;
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break;
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case '1':
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param = get_reg (param, &val);
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opcode |= val << 16;
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break;
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case '2':
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param = get_reg (param, &val);
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opcode |= val;
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break;
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case '3':
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param = get_reg (param, &val);
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opcode |= (val << 16) | val;
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break;
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case 'I':
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param = get_imm16 (param, insn);
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break;
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case 'b':
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param = get_bf (param, &val);
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opcode |= val;
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break;
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case 'p':
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param = get_pcr (param, insn, RELOC_PC16);
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break;
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case 'P':
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param = get_pcr (param, insn, RELOC_PC26);
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break;
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case 'B':
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param = get_cmp (param, &val);
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opcode |= val;
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break;
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case 'M':
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param = get_cnd (param, &val);
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opcode |= val;
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break;
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case 'c':
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param = get_cr (param, &val);
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opcode |= val << 5;
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break;
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case 'f':
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param = get_fcr (param, &val);
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opcode |= val << 5;
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break;
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case 'V':
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param = get_vec9 (param, &val);
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opcode |= val;
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break;
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case '?':
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/* Having this here repeats the warning somtimes.
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But can't we stand that? */
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as_warn ("Use of obsolete instruction");
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break;
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}
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}
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}
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char *
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match_name (param, assoc_tab, valp)
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char *param;
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struct field_val_assoc *assoc_tab;
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unsigned *valp;
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{
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int i;
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char *name;
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int name_len;
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for (i = 0;; i++)
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{
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name = assoc_tab[i].name;
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if (name == NULL)
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return NULL;
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name_len = strlen (name);
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if (!strncmp (param, name, name_len))
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{
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*valp = assoc_tab[i].val;
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return param + name_len;
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}
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}
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}
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char *
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get_reg (param, regnop)
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char *param;
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unsigned *regnop;
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{
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unsigned c;
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unsigned regno;
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c = *param++;
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if (c == 'r')
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{
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regno = *param++ - '0';
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if (regno < 10)
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{
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if (regno == 0)
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{
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*regnop = 0;
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return param;
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}
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c = *param - '0';
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if (c < 10)
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{
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regno = regno * 10 + c;
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if (c < 32)
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{
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*regnop = regno;
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return param + 1;
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}
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}
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else
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{
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*regnop = regno;
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return param;
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}
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}
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return NULL;
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}
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else if (c == 's' && param[0] == 'p')
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{
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*regnop = 31;
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return param + 1;
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}
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return 0;
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}
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char *
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get_imm16 (param, insn)
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char *param;
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struct m88k_insn *insn;
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{
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enum reloc_type reloc = NO_RELOC;
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unsigned int val;
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segT seg;
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char *save_ptr;
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if (!strncmp (param, "hi16", 4) && !isalnum (param[4]))
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{
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reloc = RELOC_HI16;
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param += 4;
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}
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else if (!strncmp (param, "lo16", 4) && !isalnum (param[4]))
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{
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reloc = RELOC_LO16;
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param += 4;
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}
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else if (!strncmp (param, "iw16", 4) && !isalnum (param[4]))
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{
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reloc = RELOC_IW16;
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param += 4;
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}
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|
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save_ptr = input_line_pointer;
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input_line_pointer = param;
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seg = expression (&insn->exp);
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param = input_line_pointer;
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input_line_pointer = save_ptr;
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|
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val = insn->exp.X_add_number;
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|
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if (seg == SEG_ABSOLUTE)
|
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{
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/* Insert the value now, and reset reloc to NO_RELOC. */
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if (reloc == NO_RELOC)
|
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{
|
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/* Warn about too big expressions if not surrounded by xx16. */
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if (val > 0xffff)
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as_warn ("Expression truncated to 16 bits");
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}
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|
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if (reloc == RELOC_HI16)
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val >>= 16;
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|
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insn->opcode |= val & 0xffff;
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reloc = NO_RELOC;
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}
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else if (reloc == NO_RELOC)
|
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/* We accept a symbol even without lo16, hi16, etc, and assume
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lo16 was intended. */
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reloc = RELOC_LO16;
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|
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insn->reloc = reloc;
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return param;
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}
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|
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char *
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get_pcr (param, insn, reloc)
|
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char *param;
|
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struct m88k_insn *insn;
|
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enum reloc_type reloc;
|
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{
|
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char *saveptr, *saveparam;
|
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segT seg;
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saveptr = input_line_pointer;
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input_line_pointer = param;
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seg = expression (&insn->exp);
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saveparam = input_line_pointer;
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input_line_pointer = saveptr;
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|
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/* Botch: We should relocate now if SEG_ABSOLUTE. */
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insn->reloc = reloc;
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|
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return saveparam;
|
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}
|
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|
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char *
|
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get_cmp (param, valp)
|
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char *param;
|
|
unsigned *valp;
|
|
{
|
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unsigned int val;
|
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char *save_ptr;
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|
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save_ptr = param;
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|
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param = match_name (param, cmpslot, valp);
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val = *valp;
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|
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if (param == NULL)
|
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{
|
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param = save_ptr;
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|
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save_ptr = input_line_pointer;
|
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input_line_pointer = param;
|
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val = get_absolute_expression ();
|
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param = input_line_pointer;
|
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input_line_pointer = save_ptr;
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|
|
if (val >= 32)
|
|
{
|
|
as_warn ("Expression truncated to 5 bits");
|
|
val %= 32;
|
|
}
|
|
}
|
|
|
|
*valp = val << 21;
|
|
return param;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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++;
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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);
|
|
if (param == NULL)
|
|
return NULL;
|
|
input_line_pointer = save_ptr;
|
|
}
|
|
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;
|
|
}
|
|
|
|
char *
|
|
get_cr (param, regnop)
|
|
char *param;
|
|
unsigned *regnop;
|
|
{
|
|
unsigned regno;
|
|
unsigned c;
|
|
int i;
|
|
int name_len;
|
|
|
|
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;
|
|
}
|
|
|
|
char *
|
|
get_fcr (param, regnop)
|
|
char *param;
|
|
unsigned *regnop;
|
|
{
|
|
unsigned regno;
|
|
unsigned c;
|
|
int i;
|
|
int name_len;
|
|
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
#define hexval(z) \
|
|
(isdigit (z) ? (z) - '0' : \
|
|
islower (z) ? (z) - 'a' + 10 : \
|
|
isupper (z) ? (z) - 'A' + 10 : -1)
|
|
|
|
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;
|
|
int val;
|
|
int nbytes;
|
|
{
|
|
switch (nbytes)
|
|
{
|
|
case 4:
|
|
*buf++ = val >> 24;
|
|
*buf++ = val >> 16;
|
|
case 2:
|
|
*buf++ = val >> 8;
|
|
case 1:
|
|
*buf = val;
|
|
break;
|
|
|
|
default:
|
|
abort ();
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
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;
|
|
char *atof_ieee ();
|
|
|
|
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 ""; /* Someone should teach Dean about null pointers */
|
|
}
|
|
|
|
int md_short_jump_size = 4;
|
|
|
|
void
|
|
md_create_short_jump (ptr, from_addr, to_addr, frag, to_symbol)
|
|
char *ptr;
|
|
long from_addr, to_addr;
|
|
fragS *frag;
|
|
symbolS *to_symbol;
|
|
{
|
|
ptr[0] = 0xc0;
|
|
ptr[1] = 0x00;
|
|
ptr[2] = 0x00;
|
|
ptr[3] = 0x00;
|
|
fix_new (frag,
|
|
ptr - frag->fr_literal,
|
|
4,
|
|
to_symbol,
|
|
(symbolS *) 0,
|
|
(long int) 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;
|
|
long from_addr, to_addr;
|
|
fragS *frag;
|
|
symbolS *to_symbol;
|
|
{
|
|
ptr[0] = 0xc0;
|
|
ptr[1] = 0x00;
|
|
ptr[2] = 0x00;
|
|
ptr[3] = 0x00;
|
|
fix_new (frag,
|
|
ptr - frag->fr_literal,
|
|
4,
|
|
to_symbol,
|
|
(symbolS *) 0,
|
|
(long int) 0,
|
|
0,
|
|
RELOC_PC26);
|
|
}
|
|
|
|
int
|
|
md_estimate_size_before_relax (fragP, segment_type)
|
|
fragS *fragP;
|
|
int segment_type;
|
|
{
|
|
as_fatal ("Relaxation should never occur");
|
|
}
|
|
|
|
const relax_typeS md_relax_table[] =
|
|
{0};
|
|
|
|
void
|
|
md_convert_frag (fragP)
|
|
fragS *fragP;
|
|
{
|
|
as_fatal ("Relaxation should never occur");
|
|
}
|
|
|
|
void
|
|
md_end ()
|
|
{
|
|
}
|
|
|
|
/*
|
|
* 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 -= fixP->fx_where; */
|
|
ri.r_addend -= ri.r_address;
|
|
}
|
|
else
|
|
{
|
|
ri.r_addend = fixP->fx_addnumber;
|
|
}
|
|
|
|
/* md_ri_to_chars ((char *) &ri, ri); */
|
|
append (&next_object_file_charP, (char *) &ri, sizeof (ri));
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
static void
|
|
s_bss ()
|
|
{
|
|
char *name;
|
|
char c;
|
|
char *p;
|
|
int temp, bss_align;
|
|
symbolS *symbolP;
|
|
extern const char is_end_of_line[256];
|
|
|
|
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_new (SEG_BSS, 1); /* switch to bss */
|
|
|
|
if (bss_align)
|
|
frag_align (bss_align, 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,
|
|
temp, (char *)0);
|
|
*p = 0;
|
|
S_SET_SEGMENT (symbolP, SEG_BSS);
|
|
|
|
subseg_new (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++;
|
|
}
|
|
|
|
return;
|
|
}
|