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authorIan Lance Taylor <ian@airs.com>1993-01-07 18:21:29 +0000
committerIan Lance Taylor <ian@airs.com>1993-01-07 18:21:29 +0000
commitd0ba1cea3055ddd7c1216a95c068dcedbaa93396 (patch)
tree1fc1cad875423765679e0453e772f552dd6e1c3c /opcodes/mips-dis.c
parentddf41dc7424a4f515aba41a61f8d4b0787df6a7b (diff)
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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.
Diffstat (limited to 'opcodes/mips-dis.c')
-rw-r--r--opcodes/mips-dis.c181
1 files changed, 181 insertions, 0 deletions
diff --git a/opcodes/mips-dis.c b/opcodes/mips-dis.c
new file mode 100644
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--- /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 <stdio.h>
+#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;
+}