From d0ba1cea3055ddd7c1216a95c068dcedbaa93396 Mon Sep 17 00:00:00 2001 From: Ian Lance Taylor Date: Thu, 7 Jan 1993 18:21:29 +0000 Subject: [PATCH] Thu Jan 7 13:15:17 1993 Ian Lance Taylor (ian@tweedledumb.cygnus.com) * mips-dis.c: New file, from gdb/mips-pinsn.c. * Makefile.in (DIS_LIBS): Added mips-dis.o. (CFILES): Added mips-dis.c. --- opcodes/mips-dis.c | 181 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 181 insertions(+) create mode 100644 opcodes/mips-dis.c diff --git a/opcodes/mips-dis.c b/opcodes/mips-dis.c new file mode 100644 index 0000000..1be0fbd --- /dev/null +++ b/opcodes/mips-dis.c @@ -0,0 +1,181 @@ +/* Print mips instructions for GDB, the GNU debugger, or for objdump. + Copyright 1989, 1991, 1992 Free Software Foundation, Inc. + Contributed by Nobuyuki Hikichi(hikichi@sra.co.jp). + +This file is part of GDB. + +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. */ + +#include "sysdep.h" +#include +#include "bfd.h" +#include "opcode/mips.h" + +/* FIXME: we need direct access to the swapping functions. */ +#include "libbfd.h" + +/* We use bfd_vma in a couple of places where gdb expects CORE_ADDR. */ +#ifdef HOST_64_BIT + #error FIXME: bfd_vma will not match gdb expectations +#endif + +/* This file is used both by gdb and by objdump. A program which + wants to use this code must provide an external function + print_address. */ +extern int print_address PARAMS ((bfd_vma, FILE *)); + +/* Mips instructions are never longer than this many bytes. */ +#define MAXLEN 4 + +/* Number of elements in the opcode table. */ +#define NOPCODES (sizeof mips_opcodes / sizeof mips_opcodes[0]) + +/* FIXME: This should be shared with gdb somehow. */ +#define REGISTER_NAMES \ + { "zero", "at", "v0", "v1", "a0", "a1", "a2", "a3", \ + "t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", \ + "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7", \ + "t8", "t9", "k0", "k1", "gp", "sp", "s8", "ra", \ + "sr", "lo", "hi", "bad", "cause","pc", \ + "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \ + "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \ + "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",\ + "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",\ + "fsr", "fir", "fp", "inx", "rand", "tlblo","ctxt", "tlbhi",\ + "epc", "prid"\ + } + +static CONST char * CONST reg_names[] = REGISTER_NAMES; + +/* subroutine */ +static unsigned char * +print_insn_arg (d, l, stream, pc) + char *d; + register unsigned long int *l; + FILE *stream; + bfd_vma pc; +{ + switch (*d) + { + case ',': + case '(': + case ')': + fputc (*d, stream); + break; + + case 's': + fprintf (stream, "$%s", reg_names[((struct op_i_fmt *) l)->rs]); + break; + + case 't': + fprintf (stream, "$%s", reg_names[((struct op_i_fmt *) l)->rt]); + break; + + case 'i': + fprintf (stream, "%d", ((struct op_i_fmt *) l)->immediate); + break; + + case 'j': /* same as i, but sign-extended */ + fprintf (stream, "%d", ((struct op_b_fmt *) l)->delta); + break; + + case 'a': + print_address ((pc & 0xF0000000) | (((struct op_j_fmt *)l)->target << 2), + stream); + break; + + case 'b': + print_address ((((struct op_b_fmt *) l)->delta << 2) + pc + 4, stream); + break; + + case 'd': + fprintf (stream, "$%s", reg_names[((struct op_r_fmt *) l)->rd]); + break; + + case 'h': + fprintf (stream, "0x%x", ((struct op_r_fmt *) l)->shamt); + break; + + case 'B': + fprintf (stream, "0x%x", ((struct op_brk_fmt *) l)->code); + break; + + case 'S': + fprintf (stream, "$f%d", ((struct fop_r_fmt *) l)->fs); + break; + + case 'T': + fprintf (stream, "$f%d", ((struct fop_r_fmt *) l)->ft); + break; + + case 'D': + fprintf (stream, "$f%d", ((struct fop_r_fmt *) l)->fd); + break; + + default: + fprintf (stream, "# internal error, undefined modifier(%c)", *d); + break; + } +} + +/* Print the mips instruction at address MEMADDR in debugged memory, + on STREAM. Returns length of the instruction, in bytes, which is + always 4. BIGENDIAN must be 1 if this is big-endian code, 0 if + this is little-endian code. */ + +int +print_insn_mips (memaddr, buffer, stream, bigendian) + bfd_vma memaddr; + bfd_byte *buffer; + FILE *stream; + int bigendian; +{ + register int i; + register char *d; + unsigned long int l; + + /* FIXME: can't we export these functions from bfd? */ + if (bigendian) + l = _do_getb32 (buffer); + else + l = _do_getl32 (buffer); + + for (i = 0; i < NOPCODES; i++) + { + register unsigned int opcode = mips_opcodes[i].opcode; + register unsigned int match = mips_opcodes[i].match; + if ((l & match) == opcode) + break; + } + + /* Handle undefined instructions. */ + if (i == NOPCODES) + { + fprintf (stream, "0x%x",l); + return 4; + } + + fprintf (stream, "%s", mips_opcodes[i].name); + + if (!(d = mips_opcodes[i].args)) + return 4; + + fputc (' ', stream); + + while (*d) + print_insn_arg (d++, &l, stream, memaddr); + + return 4; +} -- 2.7.4