1614 lines
30 KiB
C
1614 lines
30 KiB
C
/* tc-z8k.c -- Assemble code for the Zilog Z800n
|
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Copyright (C) 1992, 93, 94, 95, 96, 1997 Free Software Foundation.
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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
|
||
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 the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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/*
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Written By Steve Chamberlain
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sac@cygnus.com
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*/
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#define DEFINE_TABLE
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#include <stdio.h>
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#include "opcodes/z8k-opc.h"
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#include "as.h"
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#include "bfd.h"
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#include <ctype.h>
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const char comment_chars[] =
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{'!', 0};
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const char line_separator_chars[] =
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{';', 0};
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const char line_comment_chars[] =
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{'#', 0};
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extern int machine;
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extern int coff_flags;
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int segmented_mode;
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const int md_reloc_size;
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/* This table describes all the machine specific pseudo-ops the assembler
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has to support. The fields are:
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pseudo-op name without dot
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||
function to call to execute this pseudo-op
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||
Integer arg to pass to the function
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*/
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||
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||
void cons ();
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||
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void
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||
s_segm ()
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{
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segmented_mode = 1;
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machine = bfd_mach_z8001;
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coff_flags = F_Z8001;
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||
}
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||
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||
void
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||
s_unseg ()
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||
{
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||
segmented_mode = 0;
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machine = bfd_mach_z8002;
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coff_flags = F_Z8002;
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}
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static
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||
void
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||
even ()
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{
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frag_align (1, 0, 0);
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record_alignment (now_seg, 1);
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}
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void obj_coff_section ();
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int
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tohex (c)
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int c;
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{
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if (isdigit (c))
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return c - '0';
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if (islower (c))
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return c - 'a' + 10;
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return c - 'A' + 10;
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}
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void
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sval ()
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{
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SKIP_WHITESPACE ();
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if (*input_line_pointer == '\'')
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{
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int c;
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input_line_pointer++;
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c = *input_line_pointer++;
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while (c != '\'')
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{
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if (c == '%')
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{
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c = (tohex (input_line_pointer[0]) << 4)
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||
| tohex (input_line_pointer[1]);
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input_line_pointer += 2;
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}
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FRAG_APPEND_1_CHAR (c);
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c = *input_line_pointer++;
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}
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demand_empty_rest_of_line ();
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}
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}
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const pseudo_typeS md_pseudo_table[] =
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{
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{"int", cons, 2},
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{"data.b", cons, 1},
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{"data.w", cons, 2},
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{"data.l", cons, 4},
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{"form", listing_psize, 0},
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{"heading", listing_title, 0},
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{"import", s_ignore, 0},
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{"page", listing_eject, 0},
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{"program", s_ignore, 0},
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{"z8001", s_segm, 0},
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{"z8002", s_unseg, 0},
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{"segm", s_segm, 0},
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{"unsegm", s_unseg, 0},
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{"unseg", s_unseg, 0},
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{"name", s_app_file, 0},
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{"global", s_globl, 0},
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{"wval", cons, 2},
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{"lval", cons, 4},
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{"bval", cons, 1},
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{"sval", sval, 0},
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{"rsect", obj_coff_section, 0},
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{"sect", obj_coff_section, 0},
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{"block", s_space, 0},
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{"even", even, 0},
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{0, 0, 0}
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};
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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 0f12.456 */
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/* or 0d1.2345e12 */
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const char FLT_CHARS[] = "rRsSfFdDxXpP";
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static struct hash_control *opcode_hash_control; /* Opcode mnemonics */
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void
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md_begin ()
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{
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opcode_entry_type *opcode;
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char *prev_name = "";
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int idx = 0;
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opcode_hash_control = hash_new ();
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for (opcode = z8k_table; opcode->name; opcode++)
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{
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/* Only enter unique codes into the table */
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char *src = opcode->name;
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if (strcmp (opcode->name, prev_name))
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{
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hash_insert (opcode_hash_control, opcode->name, (char *) opcode);
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idx++;
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}
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opcode->idx = idx;
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prev_name = opcode->name;
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}
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/* default to z8002 */
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s_unseg ();
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/* insert the pseudo ops too */
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for (idx = 0; md_pseudo_table[idx].poc_name; idx++)
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{
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opcode_entry_type *fake_opcode;
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fake_opcode = (opcode_entry_type *) malloc (sizeof (opcode_entry_type));
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fake_opcode->name = md_pseudo_table[idx].poc_name,
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fake_opcode->func = (void *) (md_pseudo_table + idx);
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fake_opcode->opcode = 250;
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hash_insert (opcode_hash_control, fake_opcode->name, fake_opcode);
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}
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linkrelax = 1;
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}
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struct z8k_exp
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{
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char *e_beg;
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char *e_end;
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expressionS e_exp;
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||
};
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typedef struct z8k_op
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{
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char regsize; /* 'b','w','r','q' */
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unsigned int reg; /* 0..15 */
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int mode;
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||
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unsigned int x_reg; /* any other register associated with the mode */
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expressionS exp; /* any expression */
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||
}
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||
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op_type;
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||
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static expressionS *da_operand;
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static expressionS *imm_operand;
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||
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||
int reg[16];
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||
int the_cc;
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||
int the_ctrl;
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||
int the_flags;
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||
int the_interrupt;
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||
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char *
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||
DEFUN (whatreg, (reg, src),
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int *reg AND
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||
char *src)
|
||
{
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||
if (isdigit (src[1]))
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{
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*reg = (src[0] - '0') * 10 + src[1] - '0';
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return src + 2;
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||
}
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else
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{
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*reg = (src[0] - '0');
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return src + 1;
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||
}
|
||
}
|
||
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/*
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||
parse operands
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||
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rh0-rh7, rl0-rl7
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||
r0-r15
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rr0-rr14
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rq0--rq12
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WREG r0,r1,r2,r3,r4,r5,r6,r7,fp,sp
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||
r0l,r0h,..r7l,r7h
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||
@WREG
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@WREG+
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@-WREG
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||
#const
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||
|
||
*/
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||
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/* try and parse a reg name, returns number of chars consumed */
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||
char *
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||
DEFUN (parse_reg, (src, mode, reg),
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char *src AND
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int *mode AND
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||
unsigned int *reg)
|
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{
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char *res = 0;
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char regno;
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||
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if (src[0] == 's' && src[1] == 'p')
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{
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if (segmented_mode)
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{
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*mode = CLASS_REG_LONG;
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*reg = 14;
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}
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else
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{
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*mode = CLASS_REG_WORD;
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*reg = 15;
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||
}
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return src + 2;
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}
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if (src[0] == 'r')
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{
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if (src[1] == 'r')
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{
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*mode = CLASS_REG_LONG;
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res = whatreg (reg, src + 2);
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||
regno = *reg;
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||
if (regno > 14)
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||
as_warn ("register rr%d, out of range.",regno);
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||
}
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||
else if (src[1] == 'h')
|
||
{
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||
*mode = CLASS_REG_BYTE;
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||
res = whatreg (reg, src + 2);
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||
regno = *reg;
|
||
if (regno > 7)
|
||
as_warn ("register rh%d, out of range.",regno);
|
||
}
|
||
else if (src[1] == 'l')
|
||
{
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||
*mode = CLASS_REG_BYTE;
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||
res = whatreg (reg, src + 2);
|
||
regno = *reg;
|
||
if (regno > 7)
|
||
as_warn ("register rl%d, out of range.",regno);
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||
*reg += 8;
|
||
}
|
||
else if (src[1] == 'q')
|
||
{
|
||
*mode = CLASS_REG_QUAD;
|
||
res = whatreg (reg, src + 2);
|
||
regno = *reg;
|
||
if (regno > 12)
|
||
as_warn ("register rq%d, out of range.",regno);
|
||
}
|
||
else
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||
{
|
||
*mode = CLASS_REG_WORD;
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||
res = whatreg (reg, src + 1);
|
||
regno = *reg;
|
||
if (regno > 15)
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||
as_warn ("register r%d, out of range.",regno);
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||
}
|
||
}
|
||
return res;
|
||
|
||
}
|
||
|
||
char *
|
||
DEFUN (parse_exp, (s, op),
|
||
char *s AND
|
||
expressionS * op)
|
||
{
|
||
char *save = input_line_pointer;
|
||
char *new;
|
||
|
||
input_line_pointer = s;
|
||
expression (op);
|
||
if (op->X_op == O_absent)
|
||
as_bad ("missing operand");
|
||
new = input_line_pointer;
|
||
input_line_pointer = save;
|
||
return new;
|
||
}
|
||
|
||
/* The many forms of operand:
|
||
|
||
<rb>
|
||
<r>
|
||
<rr>
|
||
<rq>
|
||
@r
|
||
#exp
|
||
exp
|
||
exp(r)
|
||
r(#exp)
|
||
r(r)
|
||
|
||
|
||
|
||
*/
|
||
|
||
static
|
||
char *
|
||
DEFUN (checkfor, (ptr, what),
|
||
char *ptr AND
|
||
char what)
|
||
{
|
||
if (*ptr == what)
|
||
ptr++;
|
||
else
|
||
{
|
||
as_bad ("expected %c", what);
|
||
}
|
||
return ptr;
|
||
}
|
||
|
||
/* Make sure the mode supplied is the size of a word */
|
||
static void
|
||
DEFUN (regword, (mode, string),
|
||
int mode AND
|
||
char *string)
|
||
{
|
||
int ok;
|
||
|
||
ok = CLASS_REG_WORD;
|
||
if (ok != mode)
|
||
{
|
||
as_bad ("register is wrong size for a word %s", string);
|
||
}
|
||
}
|
||
|
||
/* Make sure the mode supplied is the size of an address */
|
||
static void
|
||
DEFUN (regaddr, (mode, string),
|
||
int mode AND
|
||
char *string)
|
||
{
|
||
int ok;
|
||
|
||
ok = segmented_mode ? CLASS_REG_LONG : CLASS_REG_WORD;
|
||
if (ok != mode)
|
||
{
|
||
as_bad ("register is wrong size for address %s", string);
|
||
}
|
||
}
|
||
|
||
struct ctrl_names
|
||
{
|
||
int value;
|
||
char *name;
|
||
};
|
||
|
||
struct ctrl_names ctrl_table[] =
|
||
{
|
||
0x2, "fcw",
|
||
0X3, "refresh",
|
||
0x4, "psapseg",
|
||
0x5, "psapoff",
|
||
0x5, "psap",
|
||
0x6, "nspseg",
|
||
0x7, "nspoff",
|
||
0x7, "nsp",
|
||
0, 0
|
||
};
|
||
|
||
static void
|
||
DEFUN (get_ctrl_operand, (ptr, mode, dst),
|
||
char **ptr AND
|
||
struct z8k_op *mode AND
|
||
unsigned int dst)
|
||
{
|
||
char *src = *ptr;
|
||
int r;
|
||
int i;
|
||
|
||
while (*src == ' ')
|
||
src++;
|
||
|
||
mode->mode = CLASS_CTRL;
|
||
for (i = 0; ctrl_table[i].name; i++)
|
||
{
|
||
int j;
|
||
|
||
for (j = 0; ctrl_table[i].name[j]; j++)
|
||
{
|
||
if (ctrl_table[i].name[j] != src[j])
|
||
goto fail;
|
||
}
|
||
the_ctrl = ctrl_table[i].value;
|
||
*ptr = src + j;
|
||
return;
|
||
fail:;
|
||
}
|
||
the_ctrl = 0;
|
||
return;
|
||
}
|
||
|
||
struct flag_names
|
||
{
|
||
int value;
|
||
char *name;
|
||
|
||
};
|
||
|
||
struct flag_names flag_table[] =
|
||
{
|
||
0x1, "p",
|
||
0x1, "v",
|
||
0x2, "s",
|
||
0x4, "z",
|
||
0x8, "c",
|
||
0x0, "+",
|
||
0, 0
|
||
};
|
||
|
||
static void
|
||
DEFUN (get_flags_operand, (ptr, mode, dst),
|
||
char **ptr AND
|
||
struct z8k_op *mode AND
|
||
unsigned int dst)
|
||
{
|
||
char *src = *ptr;
|
||
int r;
|
||
int i;
|
||
int j;
|
||
|
||
while (*src == ' ')
|
||
src++;
|
||
|
||
mode->mode = CLASS_FLAGS;
|
||
the_flags = 0;
|
||
for (j = 0; j <= 9; j++)
|
||
{
|
||
if (!src[j])
|
||
goto done;
|
||
for (i = 0; flag_table[i].name; i++)
|
||
{
|
||
if (flag_table[i].name[0] == src[j])
|
||
{
|
||
the_flags = the_flags | flag_table[i].value;
|
||
goto match;
|
||
}
|
||
}
|
||
goto done;
|
||
match:
|
||
;
|
||
}
|
||
done:
|
||
*ptr = src + j;
|
||
return;
|
||
}
|
||
|
||
|
||
struct interrupt_names
|
||
{
|
||
int value;
|
||
char *name;
|
||
|
||
};
|
||
|
||
struct interrupt_names intr_table[] =
|
||
{
|
||
0x1, "nvi",
|
||
0x2, "vi",
|
||
0x3, "both",
|
||
0x3, "all",
|
||
0, 0
|
||
};
|
||
|
||
static void
|
||
DEFUN (get_interrupt_operand, (ptr, mode, dst),
|
||
char **ptr AND
|
||
struct z8k_op *mode AND
|
||
unsigned int dst)
|
||
{
|
||
char *src = *ptr;
|
||
int r;
|
||
int i;
|
||
|
||
while (*src == ' ')
|
||
src++;
|
||
|
||
mode->mode = CLASS_IMM;
|
||
for (i = 0; intr_table[i].name; i++)
|
||
{
|
||
int j;
|
||
|
||
for (j = 0; intr_table[i].name[j]; j++)
|
||
{
|
||
if (intr_table[i].name[j] != src[j])
|
||
goto fail;
|
||
}
|
||
the_interrupt = intr_table[i].value;
|
||
*ptr = src + j;
|
||
return;
|
||
fail:;
|
||
}
|
||
the_interrupt = 0x0;
|
||
return;
|
||
}
|
||
|
||
struct cc_names
|
||
{
|
||
int value;
|
||
char *name;
|
||
|
||
};
|
||
|
||
struct cc_names table[] =
|
||
{
|
||
0x0, "f",
|
||
0x1, "lt",
|
||
0x2, "le",
|
||
0x3, "ule",
|
||
0x4, "ov",
|
||
0x4, "pe",
|
||
0x5, "mi",
|
||
0x6, "eq",
|
||
0x6, "z",
|
||
0x7, "c",
|
||
0x7, "ult",
|
||
0x8, "t",
|
||
0x9, "ge",
|
||
0xa, "gt",
|
||
0xb, "ugt",
|
||
0xc, "nov",
|
||
0xc, "po",
|
||
0xd, "pl",
|
||
0xe, "ne",
|
||
0xe, "nz",
|
||
0xf, "nc",
|
||
0xf, "uge",
|
||
0, 0
|
||
};
|
||
|
||
static void
|
||
DEFUN (get_cc_operand, (ptr, mode, dst),
|
||
char **ptr AND
|
||
struct z8k_op *mode AND
|
||
unsigned int dst)
|
||
{
|
||
char *src = *ptr;
|
||
int r;
|
||
int i;
|
||
|
||
while (*src == ' ')
|
||
src++;
|
||
|
||
mode->mode = CLASS_CC;
|
||
for (i = 0; table[i].name; i++)
|
||
{
|
||
int j;
|
||
|
||
for (j = 0; table[i].name[j]; j++)
|
||
{
|
||
if (table[i].name[j] != src[j])
|
||
goto fail;
|
||
}
|
||
the_cc = table[i].value;
|
||
*ptr = src + j;
|
||
return;
|
||
fail:;
|
||
}
|
||
the_cc = 0x8;
|
||
}
|
||
|
||
static void
|
||
get_operand (ptr, mode, dst)
|
||
char **ptr;
|
||
struct z8k_op *mode;
|
||
unsigned int dst;
|
||
{
|
||
char *src = *ptr;
|
||
char *end;
|
||
unsigned int num;
|
||
unsigned int len;
|
||
unsigned int size;
|
||
|
||
mode->mode = 0;
|
||
|
||
while (*src == ' ')
|
||
src++;
|
||
if (*src == '#')
|
||
{
|
||
mode->mode = CLASS_IMM;
|
||
imm_operand = &(mode->exp);
|
||
src = parse_exp (src + 1, &(mode->exp));
|
||
}
|
||
else if (*src == '@')
|
||
{
|
||
int d;
|
||
|
||
mode->mode = CLASS_IR;
|
||
src = parse_reg (src + 1, &d, &mode->reg);
|
||
}
|
||
else
|
||
{
|
||
int regn;
|
||
|
||
end = parse_reg (src, &mode->mode, ®n);
|
||
|
||
if (end)
|
||
{
|
||
int nw, nr;
|
||
|
||
src = end;
|
||
if (*src == '(')
|
||
{
|
||
src++;
|
||
end = parse_reg (src, &nw, &nr);
|
||
if (end)
|
||
{
|
||
/* Got Ra(Rb) */
|
||
src = end;
|
||
|
||
if (*src != ')')
|
||
{
|
||
as_bad ("Missing ) in ra(rb)");
|
||
}
|
||
else
|
||
{
|
||
src++;
|
||
}
|
||
|
||
regaddr (mode->mode, "ra(rb) ra");
|
||
/* regword (mode->mode, "ra(rb) rb");*/
|
||
mode->mode = CLASS_BX;
|
||
mode->reg = regn;
|
||
mode->x_reg = nr;
|
||
reg[ARG_RX] = nr;
|
||
}
|
||
else
|
||
{
|
||
/* Got Ra(disp) */
|
||
if (*src == '#')
|
||
src++;
|
||
src = parse_exp (src, &(mode->exp));
|
||
src = checkfor (src, ')');
|
||
mode->mode = CLASS_BA;
|
||
mode->reg = regn;
|
||
mode->x_reg = 0;
|
||
imm_operand = &(mode->exp);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
mode->reg = regn;
|
||
mode->x_reg = 0;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* No initial reg */
|
||
src = parse_exp (src, &(mode->exp));
|
||
if (*src == '(')
|
||
{
|
||
src++;
|
||
end = parse_reg (src, &(mode->mode), ®n);
|
||
regword (mode->mode, "addr(Ra) ra");
|
||
mode->mode = CLASS_X;
|
||
mode->reg = regn;
|
||
mode->x_reg = 0;
|
||
da_operand = &(mode->exp);
|
||
src = checkfor (end, ')');
|
||
}
|
||
else
|
||
{
|
||
/* Just an address */
|
||
mode->mode = CLASS_DA;
|
||
mode->reg = 0;
|
||
mode->x_reg = 0;
|
||
da_operand = &(mode->exp);
|
||
}
|
||
}
|
||
}
|
||
*ptr = src;
|
||
}
|
||
|
||
static
|
||
char *
|
||
get_operands (opcode, op_end, operand)
|
||
opcode_entry_type *opcode;
|
||
char *op_end;
|
||
op_type *operand;
|
||
{
|
||
char *ptr = op_end;
|
||
char *savptr;
|
||
switch (opcode->noperands)
|
||
{
|
||
case 0:
|
||
operand[0].mode = 0;
|
||
operand[1].mode = 0;
|
||
break;
|
||
|
||
case 1:
|
||
ptr++;
|
||
if (opcode->arg_info[0] == CLASS_CC)
|
||
{
|
||
get_cc_operand (&ptr, operand + 0, 0);
|
||
}
|
||
else if (opcode->arg_info[0] == CLASS_FLAGS)
|
||
{
|
||
get_flags_operand (&ptr, operand + 0, 0);
|
||
}
|
||
else if (opcode->arg_info[0] == (CLASS_IMM +(ARG_IMM2)))
|
||
{
|
||
get_interrupt_operand (&ptr, operand + 0, 0);
|
||
}
|
||
else
|
||
{
|
||
get_operand (&ptr, operand + 0, 0);
|
||
}
|
||
operand[1].mode = 0;
|
||
break;
|
||
|
||
case 2:
|
||
ptr++;
|
||
savptr = ptr;
|
||
if (opcode->arg_info[0] == CLASS_CC)
|
||
{
|
||
get_cc_operand (&ptr, operand + 0, 0);
|
||
}
|
||
else if (opcode->arg_info[0] == CLASS_CTRL)
|
||
{
|
||
get_ctrl_operand (&ptr, operand + 0, 0);
|
||
if (the_ctrl == 0)
|
||
{
|
||
ptr = savptr;
|
||
get_operand (&ptr, operand + 0, 0);
|
||
if (ptr == 0)
|
||
return;
|
||
if (*ptr == ',')
|
||
ptr++;
|
||
get_ctrl_operand (&ptr, operand + 1, 1);
|
||
return ptr;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
get_operand (&ptr, operand + 0, 0);
|
||
}
|
||
if (ptr == 0)
|
||
return;
|
||
if (*ptr == ',')
|
||
ptr++;
|
||
get_operand (&ptr, operand + 1, 1);
|
||
break;
|
||
|
||
case 3:
|
||
ptr++;
|
||
get_operand (&ptr, operand + 0, 0);
|
||
if (*ptr == ',')
|
||
ptr++;
|
||
get_operand (&ptr, operand + 1, 1);
|
||
if (*ptr == ',')
|
||
ptr++;
|
||
get_operand (&ptr, operand + 2, 2);
|
||
break;
|
||
|
||
case 4:
|
||
ptr++;
|
||
get_operand (&ptr, operand + 0, 0);
|
||
if (*ptr == ',')
|
||
ptr++;
|
||
get_operand (&ptr, operand + 1, 1);
|
||
if (*ptr == ',')
|
||
ptr++;
|
||
get_operand (&ptr, operand + 2, 2);
|
||
if (*ptr == ',')
|
||
ptr++;
|
||
get_cc_operand (&ptr, operand + 3, 3);
|
||
break;
|
||
default:
|
||
abort ();
|
||
}
|
||
|
||
return ptr;
|
||
}
|
||
|
||
/* Passed a pointer to a list of opcodes which use different
|
||
addressing modes, return the opcode which matches the opcodes
|
||
provided
|
||
*/
|
||
|
||
static
|
||
opcode_entry_type *
|
||
DEFUN (get_specific, (opcode, operands),
|
||
opcode_entry_type * opcode AND
|
||
op_type * operands)
|
||
|
||
{
|
||
opcode_entry_type *this_try = opcode;
|
||
int found = 0;
|
||
unsigned int noperands = opcode->noperands;
|
||
|
||
unsigned int dispreg;
|
||
unsigned int this_index = opcode->idx;
|
||
|
||
while (this_index == opcode->idx && !found)
|
||
{
|
||
unsigned int i;
|
||
|
||
this_try = opcode++;
|
||
for (i = 0; i < noperands; i++)
|
||
{
|
||
int mode = operands[i].mode;
|
||
|
||
if ((mode & CLASS_MASK) != (this_try->arg_info[i] & CLASS_MASK))
|
||
{
|
||
/* it could be an pc rel operand, if this is a da mode and
|
||
we like disps, then insert it */
|
||
|
||
if (mode == CLASS_DA && this_try->arg_info[i] == CLASS_DISP)
|
||
{
|
||
/* This is the case */
|
||
operands[i].mode = CLASS_DISP;
|
||
}
|
||
else if (mode == CLASS_BA && this_try->arg_info[i])
|
||
{
|
||
/* Can't think of a way to turn what we've been given into
|
||
something that's ok */
|
||
goto fail;
|
||
}
|
||
else if (this_try->arg_info[i] & CLASS_PR)
|
||
{
|
||
if (mode == CLASS_REG_LONG && segmented_mode)
|
||
{
|
||
/* ok */
|
||
}
|
||
else if (mode == CLASS_REG_WORD && !segmented_mode)
|
||
{
|
||
/* ok */
|
||
}
|
||
else
|
||
goto fail;
|
||
}
|
||
else
|
||
goto fail;
|
||
}
|
||
switch (mode & CLASS_MASK)
|
||
{
|
||
default:
|
||
break;
|
||
case CLASS_X:
|
||
case CLASS_IR:
|
||
case CLASS_BA:
|
||
case CLASS_BX:
|
||
case CLASS_DISP:
|
||
case CLASS_REG:
|
||
case CLASS_REG_WORD:
|
||
case CLASS_REG_BYTE:
|
||
case CLASS_REG_QUAD:
|
||
case CLASS_REG_LONG:
|
||
case CLASS_REGN0:
|
||
reg[this_try->arg_info[i] & ARG_MASK] = operands[i].reg;
|
||
break;
|
||
}
|
||
}
|
||
|
||
found = 1;
|
||
fail:;
|
||
}
|
||
if (found)
|
||
return this_try;
|
||
else
|
||
return 0;
|
||
}
|
||
|
||
static void
|
||
DEFUN (check_operand, (operand, width, string),
|
||
struct z8k_op *operand AND
|
||
unsigned int width AND
|
||
char *string)
|
||
{
|
||
if (operand->exp.X_add_symbol == 0
|
||
&& operand->exp.X_op_symbol == 0)
|
||
{
|
||
|
||
/* No symbol involved, let's look at offset, it's dangerous if any of
|
||
the high bits are not 0 or ff's, find out by oring or anding with
|
||
the width and seeing if the answer is 0 or all fs*/
|
||
if ((operand->exp.X_add_number & ~width) != 0 &&
|
||
(operand->exp.X_add_number | width) != (~0))
|
||
{
|
||
as_warn ("operand %s0x%x out of range.", string, operand->exp.X_add_number);
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
static char buffer[20];
|
||
|
||
static void
|
||
DEFUN (newfix, (ptr, type, operand),
|
||
int ptr AND
|
||
int type AND
|
||
expressionS * operand)
|
||
{
|
||
if (operand->X_add_symbol
|
||
|| operand->X_op_symbol
|
||
|| operand->X_add_number)
|
||
{
|
||
fix_new_exp (frag_now,
|
||
ptr,
|
||
1,
|
||
operand,
|
||
0,
|
||
type);
|
||
}
|
||
}
|
||
|
||
static char *
|
||
DEFUN (apply_fix, (ptr, type, operand, size),
|
||
char *ptr AND
|
||
int type AND
|
||
expressionS * operand AND
|
||
int size)
|
||
{
|
||
int n = operand->X_add_number;
|
||
|
||
operand->X_add_number = n;
|
||
newfix ((ptr - buffer) / 2, type, operand);
|
||
#if 1
|
||
switch (size)
|
||
{
|
||
case 8: /* 8 nibbles == 32 bits */
|
||
*ptr++ = n >> 28;
|
||
*ptr++ = n >> 24;
|
||
*ptr++ = n >> 20;
|
||
*ptr++ = n >> 16;
|
||
case 4: /* 4 niblles == 16 bits */
|
||
*ptr++ = n >> 12;
|
||
*ptr++ = n >> 8;
|
||
case 2:
|
||
*ptr++ = n >> 4;
|
||
case 1:
|
||
*ptr++ = n >> 0;
|
||
break;
|
||
}
|
||
#endif
|
||
return ptr;
|
||
|
||
}
|
||
|
||
/* Now we know what sort of opcodes it is, lets build the bytes -
|
||
*/
|
||
#define INSERT(x,y) *x++ = y>>24; *x++ = y>> 16; *x++=y>>8; *x++ =y;
|
||
static void
|
||
build_bytes (this_try, operand)
|
||
opcode_entry_type * this_try;
|
||
struct z8k_op *operand;
|
||
{
|
||
unsigned int i;
|
||
|
||
int length;
|
||
char *output;
|
||
char *output_ptr = buffer;
|
||
char part;
|
||
int c;
|
||
char high;
|
||
int nib;
|
||
int nibble;
|
||
unsigned int *class_ptr;
|
||
|
||
frag_wane (frag_now);
|
||
frag_new (0);
|
||
|
||
memset (buffer, 20, 0);
|
||
class_ptr = this_try->byte_info;
|
||
top:;
|
||
|
||
for (nibble = 0; c = *class_ptr++; nibble++)
|
||
{
|
||
|
||
switch (c & CLASS_MASK)
|
||
{
|
||
default:
|
||
|
||
abort ();
|
||
case CLASS_ADDRESS:
|
||
/* Direct address, we don't cope with the SS mode right now */
|
||
if (segmented_mode)
|
||
{
|
||
da_operand->X_add_number |= 0x80000000;
|
||
output_ptr = apply_fix (output_ptr, R_IMM32, da_operand, 8);
|
||
}
|
||
else
|
||
{
|
||
output_ptr = apply_fix (output_ptr, R_IMM16, da_operand, 4);
|
||
}
|
||
da_operand = 0;
|
||
break;
|
||
case CLASS_DISP8:
|
||
/* pc rel 8 bit */
|
||
output_ptr = apply_fix (output_ptr, R_JR, da_operand, 2);
|
||
da_operand = 0;
|
||
break;
|
||
|
||
case CLASS_0DISP7:
|
||
/* pc rel 7 bit */
|
||
*output_ptr = 0;
|
||
output_ptr = apply_fix (output_ptr, R_DISP7, da_operand, 2);
|
||
da_operand = 0;
|
||
break;
|
||
|
||
case CLASS_1DISP7:
|
||
/* pc rel 7 bit */
|
||
*output_ptr = 0x80;
|
||
output_ptr = apply_fix (output_ptr, R_DISP7, da_operand, 2);
|
||
output_ptr[-2] = 0x8;
|
||
da_operand = 0;
|
||
break;
|
||
|
||
case CLASS_BIT_1OR2:
|
||
*output_ptr = c & 0xf;
|
||
if (imm_operand)
|
||
{
|
||
if (imm_operand->X_add_number == 2)
|
||
{
|
||
*output_ptr |= 2;
|
||
}
|
||
else if (imm_operand->X_add_number != 1)
|
||
{
|
||
as_bad ("immediate must be 1 or 2");
|
||
}
|
||
}
|
||
else
|
||
{
|
||
as_bad ("immediate 1 or 2 expected");
|
||
}
|
||
output_ptr++;
|
||
break;
|
||
case CLASS_CC:
|
||
*output_ptr++ = the_cc;
|
||
break;
|
||
case CLASS_0CCC:
|
||
*output_ptr++ = the_ctrl;
|
||
break;
|
||
case CLASS_1CCC:
|
||
*output_ptr++ = the_ctrl | 0x8;
|
||
break;
|
||
case CLASS_00II:
|
||
*output_ptr++ = (~the_interrupt & 0x3);
|
||
break;
|
||
case CLASS_01II:
|
||
*output_ptr++ = (~the_interrupt & 0x3) | 0x4;
|
||
break;
|
||
case CLASS_FLAGS:
|
||
*output_ptr++ = the_flags;
|
||
break;
|
||
case CLASS_BIT:
|
||
*output_ptr++ = c & 0xf;
|
||
break;
|
||
case CLASS_REGN0:
|
||
if (reg[c & 0xf] == 0)
|
||
{
|
||
as_bad ("can't use R0 here");
|
||
}
|
||
case CLASS_REG:
|
||
case CLASS_REG_BYTE:
|
||
case CLASS_REG_WORD:
|
||
case CLASS_REG_LONG:
|
||
case CLASS_REG_QUAD:
|
||
/* Insert bit mattern of
|
||
right reg */
|
||
*output_ptr++ = reg[c & 0xf];
|
||
break;
|
||
case CLASS_DISP:
|
||
output_ptr = apply_fix (output_ptr, R_IMM16, da_operand, 4);
|
||
da_operand = 0;
|
||
break;
|
||
|
||
case CLASS_IMM:
|
||
{
|
||
nib = 0;
|
||
switch (c & ARG_MASK)
|
||
{
|
||
case ARG_IMM4:
|
||
output_ptr = apply_fix (output_ptr, R_IMM4L, imm_operand, 1);
|
||
break;
|
||
case ARG_IMM4M1:
|
||
imm_operand->X_add_number--;
|
||
output_ptr = apply_fix (output_ptr, R_IMM4L, imm_operand, 1);
|
||
break;
|
||
case ARG_IMMNMINUS1:
|
||
imm_operand->X_add_number--;
|
||
output_ptr = apply_fix (output_ptr, R_IMM4L, imm_operand, 1);
|
||
break;
|
||
case ARG_NIM8:
|
||
imm_operand->X_add_number = -imm_operand->X_add_number;
|
||
case ARG_IMM8:
|
||
output_ptr = apply_fix (output_ptr, R_IMM8, imm_operand, 2);
|
||
break;
|
||
case ARG_IMM16:
|
||
output_ptr = apply_fix (output_ptr, R_IMM16, imm_operand, 4);
|
||
break;
|
||
|
||
case ARG_IMM32:
|
||
output_ptr = apply_fix (output_ptr, R_IMM32, imm_operand, 8);
|
||
break;
|
||
|
||
default:
|
||
abort ();
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Copy from the nibble buffer into the frag */
|
||
|
||
{
|
||
int length = (output_ptr - buffer) / 2;
|
||
char *src = buffer;
|
||
char *fragp = frag_more (length);
|
||
|
||
while (src < output_ptr)
|
||
{
|
||
*fragp = (src[0] << 4) | src[1];
|
||
src += 2;
|
||
fragp++;
|
||
}
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/* This is the guts of the machine-dependent assembler. STR points to a
|
||
machine dependent instruction. This funciton is supposed to emit
|
||
the frags/bytes it assembles to.
|
||
*/
|
||
|
||
void
|
||
DEFUN (md_assemble, (str),
|
||
char *str)
|
||
{
|
||
char *op_start;
|
||
char *op_end;
|
||
unsigned int i;
|
||
struct z8k_op operand[3];
|
||
opcode_entry_type *opcode;
|
||
opcode_entry_type *prev_opcode;
|
||
|
||
char *dot = 0;
|
||
char c;
|
||
|
||
/* Drop leading whitespace */
|
||
while (*str == ' ')
|
||
str++;
|
||
|
||
/* find the op code end */
|
||
for (op_start = op_end = str;
|
||
*op_end != 0 && *op_end != ' ';
|
||
op_end++)
|
||
{
|
||
}
|
||
|
||
;
|
||
|
||
if (op_end == op_start)
|
||
{
|
||
as_bad ("can't find opcode ");
|
||
}
|
||
c = *op_end;
|
||
|
||
*op_end = 0;
|
||
|
||
opcode = (opcode_entry_type *) hash_find (opcode_hash_control,
|
||
op_start);
|
||
|
||
|
||
if (opcode == NULL)
|
||
{
|
||
as_bad ("unknown opcode");
|
||
return;
|
||
}
|
||
|
||
if (opcode->opcode == 250)
|
||
{
|
||
/* was really a pseudo op */
|
||
|
||
pseudo_typeS *p;
|
||
char oc;
|
||
|
||
char *old = input_line_pointer;
|
||
*op_end = c;
|
||
|
||
|
||
input_line_pointer = op_end;
|
||
|
||
oc = *old;
|
||
*old = '\n';
|
||
while (*input_line_pointer == ' ')
|
||
input_line_pointer++;
|
||
p = (pseudo_typeS *) (opcode->func);
|
||
|
||
(p->poc_handler) (p->poc_val);
|
||
input_line_pointer = old;
|
||
*old = oc;
|
||
}
|
||
else
|
||
{
|
||
input_line_pointer = get_operands (opcode, op_end,
|
||
operand);
|
||
prev_opcode = opcode;
|
||
|
||
opcode = get_specific (opcode, operand);
|
||
|
||
if (opcode == 0)
|
||
{
|
||
/* Couldn't find an opcode which matched the operands */
|
||
char *where = frag_more (2);
|
||
|
||
where[0] = 0x0;
|
||
where[1] = 0x0;
|
||
|
||
as_bad ("Can't find opcode to match operands");
|
||
return;
|
||
}
|
||
|
||
build_bytes (opcode, operand);
|
||
}
|
||
}
|
||
|
||
void
|
||
DEFUN (tc_crawl_symbol_chain, (headers),
|
||
object_headers * headers)
|
||
{
|
||
printf ("call to tc_crawl_symbol_chain \n");
|
||
}
|
||
|
||
symbolS *
|
||
DEFUN (md_undefined_symbol, (name),
|
||
char *name)
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
void
|
||
DEFUN (tc_headers_hook, (headers),
|
||
object_headers * headers)
|
||
{
|
||
printf ("call to tc_headers_hook \n");
|
||
}
|
||
|
||
/* Various routines to kill one day */
|
||
/* Equal to MAX_PRECISION in atof-ieee.c */
|
||
#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 0;
|
||
}
|
||
|
||
CONST char *md_shortopts = "z:";
|
||
struct option md_longopts[] = {
|
||
{NULL, no_argument, NULL, 0}
|
||
};
|
||
size_t md_longopts_size = sizeof(md_longopts);
|
||
|
||
int
|
||
md_parse_option (c, arg)
|
||
int c;
|
||
char *arg;
|
||
{
|
||
switch (c)
|
||
{
|
||
case 'z':
|
||
if (!strcmp (arg, "8001"))
|
||
s_segm ();
|
||
else if (!strcmp (arg, "8002"))
|
||
s_unseg ();
|
||
else
|
||
{
|
||
as_bad ("invalid architecture -z%s", arg);
|
||
return 0;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
return 0;
|
||
}
|
||
|
||
return 1;
|
||
}
|
||
|
||
void
|
||
md_show_usage (stream)
|
||
FILE *stream;
|
||
{
|
||
fprintf(stream, "\
|
||
Z8K options:\n\
|
||
-z8001 generate segmented code\n\
|
||
-z8002 generate unsegmented code\n");
|
||
}
|
||
|
||
int md_short_jump_size;
|
||
|
||
void
|
||
tc_aout_fix_to_chars ()
|
||
{
|
||
printf ("call to tc_aout_fix_to_chars \n");
|
||
abort ();
|
||
}
|
||
|
||
void
|
||
md_create_short_jump (ptr, from_addr, to_addr, frag, to_symbol)
|
||
char *ptr;
|
||
addressT from_addr;
|
||
addressT to_addr;
|
||
fragS *frag;
|
||
symbolS *to_symbol;
|
||
{
|
||
as_fatal ("failed sanity check.");
|
||
}
|
||
|
||
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;
|
||
{
|
||
as_fatal ("failed sanity check.");
|
||
}
|
||
|
||
void
|
||
md_convert_frag (headers, seg, fragP)
|
||
object_headers *headers;
|
||
segT seg;
|
||
fragS *fragP;
|
||
{
|
||
printf ("call to md_convert_frag \n");
|
||
abort ();
|
||
}
|
||
|
||
valueT
|
||
DEFUN (md_section_align, (seg, size),
|
||
segT seg AND
|
||
valueT size)
|
||
{
|
||
return ((size + (1 << section_alignment[(int) seg]) - 1) & (-1 << section_alignment[(int) seg]));
|
||
|
||
}
|
||
|
||
void
|
||
md_apply_fix (fixP, val)
|
||
fixS *fixP;
|
||
long val;
|
||
{
|
||
char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
|
||
|
||
switch (fixP->fx_r_type)
|
||
{
|
||
case R_IMM4L:
|
||
buf[0] = (buf[0] & 0xf0) | ((buf[0] + val) & 0xf);
|
||
break;
|
||
|
||
case R_JR:
|
||
|
||
*buf++ = val;
|
||
/* if (val != 0) abort();*/
|
||
break;
|
||
|
||
case R_DISP7:
|
||
|
||
*buf++ += val;
|
||
/* if (val != 0) abort();*/
|
||
break;
|
||
|
||
case R_IMM8:
|
||
buf[0] += val;
|
||
break;
|
||
case R_IMM16:
|
||
*buf++ = (val >> 8);
|
||
*buf++ = val;
|
||
break;
|
||
case R_IMM32:
|
||
*buf++ = (val >> 24);
|
||
*buf++ = (val >> 16);
|
||
*buf++ = (val >> 8);
|
||
*buf++ = val;
|
||
break;
|
||
#if 0
|
||
case R_DA | R_SEG:
|
||
*buf++ = (val >> 16);
|
||
*buf++ = 0x00;
|
||
*buf++ = (val >> 8);
|
||
*buf++ = val;
|
||
break;
|
||
#endif
|
||
|
||
case 0:
|
||
md_number_to_chars (buf, val, fixP->fx_size);
|
||
break;
|
||
|
||
default:
|
||
abort ();
|
||
|
||
}
|
||
}
|
||
|
||
int md_long_jump_size;
|
||
int
|
||
md_estimate_size_before_relax (fragP, segment_type)
|
||
register fragS *fragP;
|
||
register segT segment_type;
|
||
{
|
||
printf ("call tomd_estimate_size_before_relax \n");
|
||
abort ();
|
||
}
|
||
|
||
/* Put number into target byte order */
|
||
|
||
void
|
||
DEFUN (md_number_to_chars, (ptr, use, nbytes),
|
||
char *ptr AND
|
||
valueT use AND
|
||
int nbytes)
|
||
{
|
||
number_to_chars_bigendian (ptr, use, nbytes);
|
||
}
|
||
long
|
||
md_pcrel_from (fixP)
|
||
fixS *fixP;
|
||
{
|
||
abort ();
|
||
}
|
||
|
||
void
|
||
tc_coff_symbol_emit_hook (s)
|
||
struct symbol *s;
|
||
{
|
||
}
|
||
|
||
void
|
||
tc_reloc_mangle (fix_ptr, intr, base)
|
||
fixS *fix_ptr;
|
||
struct internal_reloc *intr;
|
||
bfd_vma base;
|
||
|
||
{
|
||
symbolS *symbol_ptr;
|
||
|
||
if (fix_ptr->fx_addsy &&
|
||
fix_ptr->fx_subsy)
|
||
{
|
||
symbolS *add = fix_ptr->fx_addsy;
|
||
symbolS *sub = fix_ptr->fx_subsy;
|
||
if (S_GET_SEGMENT(add) != S_GET_SEGMENT(sub))
|
||
{
|
||
as_bad("Can't subtract symbols in different sections %s %s",
|
||
S_GET_NAME(add), S_GET_NAME(sub));
|
||
}
|
||
else {
|
||
int diff = S_GET_VALUE(add) - S_GET_VALUE(sub);
|
||
fix_ptr->fx_addsy = 0;
|
||
fix_ptr->fx_subsy = 0;
|
||
fix_ptr->fx_offset += diff;
|
||
}
|
||
}
|
||
symbol_ptr = fix_ptr->fx_addsy;
|
||
|
||
/* If this relocation is attached to a symbol then it's ok
|
||
to output it */
|
||
if (fix_ptr->fx_r_type == 0)
|
||
{
|
||
/* cons likes to create reloc32's whatever the size of the reloc.. */
|
||
switch (fix_ptr->fx_size)
|
||
{
|
||
case 2:
|
||
intr->r_type = R_IMM16;
|
||
break;
|
||
case 1:
|
||
intr->r_type = R_IMM8;
|
||
break;
|
||
case 4:
|
||
intr->r_type = R_IMM32;
|
||
break;
|
||
default:
|
||
abort ();
|
||
}
|
||
|
||
}
|
||
else
|
||
{
|
||
intr->r_type = fix_ptr->fx_r_type;
|
||
}
|
||
|
||
intr->r_vaddr = fix_ptr->fx_frag->fr_address + fix_ptr->fx_where + base;
|
||
intr->r_offset = fix_ptr->fx_offset;
|
||
|
||
if (symbol_ptr)
|
||
intr->r_symndx = symbol_ptr->sy_number;
|
||
else
|
||
intr->r_symndx = -1;
|
||
}
|
||
|