diff options
| -rw-r--r-- | opcodes/h8300-dis.c | 381 |
1 files changed, 381 insertions, 0 deletions
diff --git a/opcodes/h8300-dis.c b/opcodes/h8300-dis.c new file mode 100644 index 0000000..c9d2353 --- /dev/null +++ b/opcodes/h8300-dis.c @@ -0,0 +1,381 @@ +/* Disassemble h8300 instructions. + Copyright (C) 1993 Free Software Foundation, Inc. + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#define DEFINE_TABLE + +#define h8_opcodes h8ops +#include "opcode/h8300.h" +#include "dis-asm.h" + + +/* Run through the opcodes and sort them into order to make them easy + to disassemble + */ +static void +bfd_h8_disassemble_init () +{ + unsigned int i; + + + struct h8_opcode *p; + + for (p = h8_opcodes; p->name; p++) + { + int n1 = 0; + int n2 = 0; + + if ((int) p->data.nib[0] < 16) + { + n1 = (int) p->data.nib[0]; + } + else + n1 = 0; + if ((int) p->data.nib[1] < 16) + { + n2 = (int) p->data.nib[1]; + } + else + n2 = 0; + + /* Just make sure there are an even number of nibbles in it, and + that the count is the same s the length */ + for (i = 0; p->data.nib[i] != E; i++) + /*EMPTY*/ ; + if (i & 1) + abort (); + p->length = i / 2; + } + +} + + +unsigned int +bfd_h8_disassemble (addr, info, hmode) + bfd_vma addr; + disassemble_info *info; + int hmode; +{ + /* Find the first entry in the table for this opcode */ + static CONST char *regnames[] = + { + "r0h", "r1h", "r2h", "r3h", "r4h", "r5h", "r6h", "r7h", + "r0l", "r1l", "r2l", "r3l", "r4l", "r5l", "r6l", "r7l"}; + + static CONST char *wregnames[] = + { + "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", + "e0", "e1", "e2", "e3", "e4", "e5", "e6", "e7" + }; + + static CONST char *lregnames[] = + { + "er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7", + "er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7" + } + ; + + int rs = 0; + int rd = 0; + int rdisp = 0; + int abs = 0; + int plen = 0; + static boolean init; + struct h8_opcode *q = h8_opcodes; + char CONST **pregnames = hmode ? lregnames : wregnames; + int status; + unsigned char data[20]; + void *stream = info->stream; + fprintf_ftype fprintf = info->fprintf_func; + + if (!init) + { + bfd_h8_disassemble_init (); + init = true; + } + + status = info->read_memory_func(addr, data, 2, info); + if (status != 0) + { + info->memory_error_func(status, addr, info); + return -1; + } + status = info->read_memory_func(addr, data+2, 8, info); + + + + /* Find the exact opcode/arg combo */ + while (q->name) + { + op_type *nib; + unsigned int len = 0; + + nib = q->data.nib; + + while (1) + { + op_type looking_for = *nib; + int thisnib = data[len >> 1]; + + thisnib = (len & 1) ? (thisnib & 0xf) : ((thisnib >> 4) & 0xf); + + if (looking_for < 16) + { + + if (looking_for != thisnib) + goto fail; + } + + else + { + + if ((int) looking_for & (int) B31) + { + if (! (((int) thisnib & 0x8) != 0)) + goto fail; + looking_for = (op_type) ((int) looking_for & ~(int) B31); + } + if ((int) looking_for & (int) B30) + { + if (!(((int) thisnib & 0x8) == 0)) + goto fail; + looking_for = (op_type) ((int) looking_for & ~(int) B30); + } + + if (looking_for & DBIT) + { + if ((looking_for & 5) != (thisnib &5)) goto fail; + abs = (thisnib & 0x8) ? 2 : 1; + } + + else if (looking_for & (REG | IND|INC|DEC)) + { + if (looking_for & SRC) + { + rs = thisnib; + } + else + { + rd = thisnib; + } + } + else if (looking_for & L_16) + { + abs = (data[len >> 1]) * 256 + data[(len + 2) >> 1]; + plen = 16; + + } + else if(looking_for & ABSJMP) + { + abs = + (data[1] << 16) + | (data[2] << 8) + | (data[3]); + } + + else if (looking_for & L_32) + { + int i = len >> 1; + abs = (data[i] << 24) + | (data[i + 1] << 16) + | (data[i + 2] << 8) + | (data[i+ 3]); + + plen =32; + + } + else if (looking_for & L_24) + { + int i = len >> 1; + abs = (data[i] << 16) | (data[i + 1] << 8)| (data[i+ + 2]); + plen =24; + } + else if (looking_for & IGNORE) + { + + } + else if (looking_for & DISPREG) + { + rdisp = thisnib; + } + else if (looking_for & KBIT) + { + switch (thisnib) + { + case 9: + abs = 4; + break; + case 8: + abs = 2; + break; + case 0: + abs = 1; + break; + } + } + else if (looking_for & L_8) + { + plen = 8; + abs = data[len >> 1]; + } + else if (looking_for & L_3) + { + plen = 3; + + abs = thisnib; + } + else if (looking_for == E) + { + + { + int i; + + for (i = 0; i < q->length; i++) + { + fprintf (stream, "%02x ", data[i]); + } + for (; i < 6; i++) + { + fprintf (stream, " "); + } + } + fprintf (stream, "%s\t", q->name); + /* Fill in the args */ + { + op_type *args = q->args.nib; + int hadone = 0; + + + while (*args != E) + { + int x = *args; + if (hadone) + fprintf (stream, ","); + + + if (x & (IMM|KBIT|DBIT)) + { + + fprintf (stream, "#0x%x", (unsigned) abs); + } + else if (x & REG) + { + int rn = (x & DST) ? rd : rs; + switch (x & SIZE) + { + case L_8: + fprintf (stream, "%s", regnames[rn]); + break; + case L_16: + fprintf (stream, "%s", wregnames[rn]); + break; + case L_P: + case L_32: + fprintf (stream, "%s", lregnames[rn]); + break; + + } + } + + else if (x & INC) + { + fprintf (stream, "@%s+", pregnames[rs]); + } + else if (x & DEC) + { + fprintf (stream, "@-%s", pregnames[rd]); + } + + else if (x & IND) + { + int rn = (x & DST) ? rd : rs; + fprintf (stream, "@%s", pregnames[rn]); + } + + else if (x & (ABS|ABSJMP|ABSMOV)) + { + fprintf (stream, "@0x%x:%d", (unsigned) abs, plen); + } + + else if (x & MEMIND) + { + fprintf (stream, "@@%d (%x)", abs, abs); + } + + else if (x & PCREL) + { + fprintf (stream, ".%s%d (%x)", (char) abs > 0 ? "+" : "", (char) abs, + addr + (char) abs + 2); + } + else if (x & DISP) + { + fprintf (stream, "@(0x%x:%d,%s)", abs,plen, pregnames[rdisp]); + } + + else if (x & CCR) + { + + fprintf (stream, "ccr"); + } + + else + fprintf (stream, "Hmmmm %x", x); + hadone = 1; + args++; + } + } + return q->length; + } + + + else + { + fprintf (stream, "Dont understand %x \n", looking_for); + } + } + + len++; + nib++; + } + + fail: + q++; + } + + /* Fell of the end */ + fprintf (stream, "%02x %02x .word\tH'%x,H'%x", + data[0], data[1], + data[0], data[1]); + return 2; +} + +int +print_insn_h8300 (addr, info) +bfd_vma addr; +disassemble_info *info; +{ + return bfd_h8_disassemble (addr, info , 0); +} + + int +print_insn_h8300h (addr, info) +bfd_vma addr; +disassemble_info *info; +{ + return bfd_h8_disassemble (addr, info , 1); +} + |