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https://github.com/darlinghq/darling-gdb.git
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394 lines
9.0 KiB
C
394 lines
9.0 KiB
C
/* BFD library support routines for the Hitachi H8/300 architecture.
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Copyright (C) 1990-1991 Free Software Foundation, Inc.
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Hacked by Steve Chamberlain of Cygnus Support.
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This file is part of BFD, the Binary File Descriptor library.
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This program 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 of the License, or
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(at your option) any later version.
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This program 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 this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include <sysdep.h>
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#include "bfd.h"
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#include "libbfd.h"
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#define DEFINE_TABLE
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#include "h8300-opcode.h"
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#define MAXSAME 14
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static struct h8_opcode * h8_opcodes_sorted[256][MAXSAME];
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/* Run through the opcodes and sort them into order to make them easy
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to disassemble
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*/
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static void
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DEFUN_VOID(bfd_h8_disassemble_init)
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{
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unsigned int i;
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struct h8_opcode *p;
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for (p = h8_opcodes; p->name; p++) {
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int where = 0;
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int n1 = 0;
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int n2 = 0;
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int n3 = 0;
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int n4= 0;
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if ((int)p->data.nib[0] < 16) {
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n1 =(int) p->data.nib[0] ;
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} else n1 = 0;
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if ((int)p->data.nib[1] < 16) {
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n2 = (int) p->data.nib[1];
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}else n2 = 0;
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for (i = 0; i < MAXSAME; i++) {
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int j = n1 * 16 + n2;
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if (h8_opcodes_sorted[j][i] == (struct h8_opcode *)NULL) {
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h8_opcodes_sorted[j][i] = p;
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break;
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}
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}
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if (i==MAXSAME)abort();
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/* Just make sure there are an even number of nibbles in it, and
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that the count is the same s the length */
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for (i = 0; p->data.nib[i] != E; i++) ;
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if (i & 1) abort();
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if (i/2 != p->length) abort();
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}
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for (i = 0; i < 256; i++)
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{
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if (h8_opcodes_sorted[i][0])
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p = h8_opcodes_sorted[i][0];
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else h8_opcodes_sorted[i][0] = p;
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}
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}
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unsigned int
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DEFUN(bfd_h8_disassemble,(addr, data, stream),
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bfd_vma addr AND
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CONST bfd_byte *data AND
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FILE *stream)
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{
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/* Find the first entry in the table for this opcode */
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int rs = 0;
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int rd = 0;
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int rdisp = 0;
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int abs = 0;
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struct h8_opcode **p = h8_opcodes_sorted[(unsigned)(data[0])];
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struct h8_opcode *q;
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/* Find the exact opcode/arg combo */
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while (*p) {
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op_enum_type *nib;
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unsigned int len = 0;
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q = *p++;
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nib =q->data.nib;
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while (*nib != E) {
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op_enum_type looking_for = *nib;
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int thisnib = data[len>>1] ;
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thisnib = (len & 1) ? (thisnib & 0xf) : ((thisnib >> 4) & 0xf);
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if ((int)looking_for & (int)B31) {
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if (((int)thisnib & 0x8) ==0) goto fail;
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looking_for = (op_enum_type)((int)looking_for & ~(int)B31);
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}
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if ((int)looking_for & (int)B30) {
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if (((int)thisnib & 0x8) !=0) goto fail;
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looking_for = (op_enum_type)((int)looking_for & ~(int)B30);
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}
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switch (looking_for) {
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case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
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case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
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if ((int)looking_for != thisnib) goto fail;
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break;
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case ABS16SRC:
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case ABS16DST:
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case DISPSRC:
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case DISPDST:
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case IMM16:
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abs = (data[len>>1]) * 256 + data[(len+2)>>1];
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len+=3;
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nib+=3;
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break;
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case DISPREG:
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rdisp = thisnib;
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break;
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case KBIT:
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abs = thisnib == 0x80 ? 2:1;
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break;
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case IMM8:
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case ABS8SRC:
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case ABS8DST:
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case DISP8:
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abs= data[len>>1];
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len++;
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nib++;
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break;
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case IMM3:
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abs = thisnib ;
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break;
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case RS8:
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case RS16:
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case RSINC:
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case RSIND:
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rs = thisnib;
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break;
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case RD16:
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case RDDEC:
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case RD8:
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case RDIND:
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rd = thisnib;
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break;
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default:
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fprintf(stream, "Dont understand \n");
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goto found;
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}
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len++;
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nib++;
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}
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goto found;
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fail:
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;
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}
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fprintf(stream, "%02x %02x .word\tH'%x,H'%x\n",
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data[0], data[1],
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data[0], data[1]);
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return 2;
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found:;
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{ int i;
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for (i = 0; i < q->length; i++) {
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fprintf(stream, "%02x ", data[i]);
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}
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for (; i < 6; i++) {
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fprintf(stream, " ");
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}
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}
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fprintf(stream, "%s\t",q->name);
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/* Now print out the args */
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{
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op_enum_type *args = q->args.nib;
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int hadone = 0;
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while (*args != E) {
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if (hadone)
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fprintf(stream, ",");
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switch ((int)(*args) & ~((int)B30|(int)B31)) {
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case IMM16:
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case IMM8:
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case IMM3:
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fprintf(stream, "#H'%x", (unsigned)abs); break;
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case RD8:
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fprintf(stream, "r%d%c", rd/2, rd & 1 ? 'l' : 'h'); break;
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case RS8:
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fprintf(stream, "r%d%c", rs/2, rs & 1 ? 'l' : 'h'); break;
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case RD16:
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fprintf(stream, "r%d", rd& 0x7); break;
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case RS16:
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fprintf(stream, "r%d", rs & 0x7); break;
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case RSINC:
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fprintf(stream, "@r%d+", rs & 0x7); break;
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case RDDEC:
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fprintf(stream, "@-r%d", rd & 0x7); break;
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case RDIND:
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fprintf(stream, "@r%d", rd & 0x7); break;
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case RSIND:
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fprintf(stream, "@r%d",rs & 0x7); break;
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case ABS8SRC:
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case ABS16SRC:
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case ABS16DST:
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case ABS8DST:
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fprintf(stream, "@H'%x", (unsigned)abs); break;
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case DISP8:
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fprintf(stream, "%d", (char)abs);break;
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case DISPSRC:
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case DISPDST:
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fprintf(stream, "@(%d,r%d)", abs, rdisp & 0x7); break;
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case CCR:
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fprintf(stream, "ccr"); break;
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case KBIT:
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fprintf(stream, "#%d",abs); break;
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default:
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abort();
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}
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hadone = 1;
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args++;
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}
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}
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return q->length;
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}
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unsigned int DEFUN( print_insn_h8300,(addr, data, file),
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bfd_vma addr AND
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CONST bfd_byte *data AND
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PTR file)
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{
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static boolean init;
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if (!init) {
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bfd_h8_disassemble_init();
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init= 1;
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}
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return bfd_h8_disassemble(addr, data, file);
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}
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/*
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Relocations for the H8
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*/
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static bfd_reloc_status_enum_type
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DEFUN(howto16_callback,(abfd, reloc_entry, symbol_in, data, ignore_input_section),
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bfd *abfd AND
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arelent *reloc_entry AND
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asymbol *symbol_in AND
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unsigned char *data AND
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asection *ignore_input_section)
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{
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long relocation = 0;
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bfd_vma addr = reloc_entry->address;
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long x = bfd_get_16(abfd, (bfd_byte *)data + addr);
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HOWTO_PREPARE(relocation, symbol_in);
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x = (x + relocation + reloc_entry->addend);
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bfd_put_16(abfd, x, (bfd_byte *)data + addr);
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return bfd_reloc_ok;
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}
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static bfd_reloc_status_enum_type
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DEFUN(howto8_callback,(abfd, reloc_entry, symbol_in, data, ignore_input_section),
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bfd *abfd AND
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arelent *reloc_entry AND
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asymbol *symbol_in AND
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unsigned char *data AND
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asection *ignore_input_section)
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{
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long relocation = 0;
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bfd_vma addr = reloc_entry->address;
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long x = bfd_get_8(abfd, (bfd_byte *)data + addr);
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HOWTO_PREPARE(relocation, symbol_in);
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x = (x + relocation + reloc_entry->addend);
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bfd_put_8(abfd, x, (bfd_byte *)data + addr);
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return bfd_reloc_ok;
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}
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static bfd_reloc_status_enum_type
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DEFUN(howto8_FFnn_callback,(abfd, reloc_entry, symbol_in, data, ignore_input_section),
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bfd *abfd AND
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arelent *reloc_entry AND
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asymbol *symbol_in AND
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unsigned char *data AND
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asection *ignore_input_section)
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{
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long relocation = 0;
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bfd_vma addr = reloc_entry->address;
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long x = bfd_get_8(abfd, (bfd_byte *)data + addr);
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abort();
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HOWTO_PREPARE(relocation, symbol_in);
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x = (x + relocation + reloc_entry->addend);
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bfd_put_8(abfd, x, (bfd_byte *)data + addr);
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return bfd_reloc_ok;
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}
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static bfd_reloc_status_enum_type
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DEFUN(howto8_pcrel_callback,(abfd, reloc_entry, symbol_in, data, ignore_input_section),
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bfd *abfd AND
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arelent *reloc_entry AND
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asymbol *symbol_in AND
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unsigned char *data AND
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asection *ignore_input_section)
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{
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long relocation = 0;
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bfd_vma addr = reloc_entry->address;
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long x = bfd_get_8(abfd, (bfd_byte *)data + addr);
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abort();
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HOWTO_PREPARE(relocation, symbol_in);
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x = (x + relocation + reloc_entry->addend);
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bfd_put_8(abfd, x, (bfd_byte *)data + addr);
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return bfd_reloc_ok;
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}
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static reloc_howto_type howto_16
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= NEWHOWTO(howto16_callback,"abs16",1,0);
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static reloc_howto_type howto_8
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= NEWHOWTO(howto8_callback,"abs8",0,0);
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static reloc_howto_type howto_8_FFnn
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= NEWHOWTO(howto8_FFnn_callback,"ff00+abs8",0,0);
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static reloc_howto_type howto_8_pcrel
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= NEWHOWTO(howto8_pcrel_callback,"pcrel8",0,1);
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static CONST struct reloc_howto_struct *DEFUN(local_bfd_reloc_type_lookup,( code),
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bfd_reloc_code_enum_type code)
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{
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switch (code) {
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case BFD_RELOC_16:
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return &howto_16;
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case BFD_RELOC_8_FFnn:
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return &howto_8_FFnn;
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case BFD_RELOC_8:
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return &howto_8;
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case BFD_RELOC_8_PCREL:
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return &howto_8_pcrel;
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}
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return (reloc_howto_type *)NULL;
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}
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int bfd_default_scan_num_mach();
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static bfd_arch_info_struct_type arch_info_struct =
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{
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16, /* 16 bits in a word */
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16, /* 16 bits in an address */
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8, /* 8 bits in a byte */
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bfd_arch_h8300,
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0, /* only 1 machine */
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"H8/300", /* arch_name */
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"H8/300", /* printable name */
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true, /* the default machine */
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bfd_default_compatible,
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bfd_default_scan,
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print_insn_h8300,
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local_bfd_reloc_type_lookup,
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0,
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};
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void DEFUN_VOID(bfd_h8300_arch)
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{
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bfd_arch_linkin(&arch_info_struct);
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}
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