19990502 sourceware importbinu_ss_19990502

1 files changed, 299 insertions, 0 deletions

diff --git a/opcodes/vax-dis.c b/opcodes/vax-dis.c
new file mode 100644
index 0000000..54b59f3
--- /dev/null
+++ b/opcodes/vax-dis.c
@@ -0,0 +1,299 @@
+/* Print VAX instructions.
+   Copyright (C) 1995, 1998 Free Software Foundation, Inc.
+   Contributed by Pauline Middelink <middelin@polyware.iaf.nl>
+
+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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#include "opcode/vax.h"
+#include "dis-asm.h"
+
+/* Local function prototypes */
+static int
+print_insn_arg PARAMS ((const char *, unsigned char *, bfd_vma,
+			disassemble_info *));
+
+static int
+print_insn_mode PARAMS ((int, unsigned char *, bfd_vma, disassemble_info *));
+
+static char *reg_names[] =
+{
+  "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
+  "r8", "r9", "r10", "r11", "ap", "fp", "sp", "pc"
+};
+
+/* Sign-extend an (unsigned char). */
+#if __STDC__ == 1
+#define COERCE_SIGNED_CHAR(ch) ((signed char)(ch))
+#else
+#define COERCE_SIGNED_CHAR(ch) ((int)(((ch) ^ 0x80) & 0xFF) - 128)
+#endif
+
+/* Get a 1 byte signed integer.  */
+#define NEXTBYTE(p)  \
+  (p += 1, FETCH_DATA (info, p), \
+  COERCE_SIGNED_CHAR(p[-1]))
+
+/* Get a 2 byte signed integer.  */
+#define COERCE16(x) ((int) (((x) ^ 0x8000) - 0x8000))
+#define NEXTWORD(p)  \
+  (p += 2, FETCH_DATA (info, p), \
+   COERCE16 ((p[-1] << 8) + p[-2]))
+
+/* Get a 4 byte signed integer.  */
+#define COERCE32(x) ((int) (((x) ^ 0x80000000) - 0x80000000))
+#define NEXTLONG(p)  \
+  (p += 4, FETCH_DATA (info, p), \
+   (COERCE32 ((((((p[-1] << 8) + p[-2]) << 8) + p[-3]) << 8) + p[-4])))
+
+/* Maximum length of an instruction.  */
+#define MAXLEN 25
+
+#include <setjmp.h>
+
+struct private
+{
+  /* Points to first byte not fetched.  */
+  bfd_byte *max_fetched;
+  bfd_byte the_buffer[MAXLEN];
+  bfd_vma insn_start;
+  jmp_buf bailout;
+};
+
+/* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive)
+   to ADDR (exclusive) are valid.  Returns 1 for success, longjmps
+   on error.  */
+#define FETCH_DATA(info, addr) \
+  ((addr) <= ((struct private *)(info->private_data))->max_fetched \
+   ? 1 : fetch_data ((info), (addr)))
+
+static int
+fetch_data (info, addr)
+     struct disassemble_info *info;
+     bfd_byte *addr;
+{
+  int status;
+  struct private *priv = (struct private *) info->private_data;
+  bfd_vma start = priv->insn_start + (priv->max_fetched - priv->the_buffer);
+
+  status = (*info->read_memory_func) (start,
+				      priv->max_fetched,
+				      addr - priv->max_fetched,
+				      info);
+  if (status != 0)
+    {
+      (*info->memory_error_func) (status, start, info);
+      longjmp (priv->bailout, 1);
+    }
+  else
+    priv->max_fetched = addr;
+
+  return 1;
+}
+
+/* Print the vax instruction at address MEMADDR in debugged memory,
+   on INFO->STREAM.  Returns length of the instruction, in bytes.  */
+
+int
+print_insn_vax (memaddr, info)
+     bfd_vma memaddr;
+     disassemble_info *info;
+{
+  const struct vot *votp;
+  const char *argp = NULL;
+  unsigned char *arg;
+  struct private priv;
+  bfd_byte *buffer = priv.the_buffer;
+
+  info->private_data = (PTR) &priv;
+  priv.max_fetched = priv.the_buffer;
+  priv.insn_start = memaddr;
+  if (setjmp (priv.bailout) != 0)
+    {
+      /* Error return.  */
+      return -1;
+    }
+
+  FETCH_DATA (info, buffer + 2);
+  for (votp = &votstrs[0]; votp->name[0]; votp++)
+    {
+      register vax_opcodeT opcode = votp->detail.code;
+
+      /* 2 byte codes match 2 buffer pos. */
+      if ((bfd_byte) opcode == buffer[0]
+	  && (opcode >> 8 == 0 || opcode >> 8 == buffer[1]))
+	{
+	  argp = votp->detail.args;
+	  break;
+	}
+    }
+  if (argp == NULL)
+    {
+      /* Handle undefined instructions. */
+      (*info->fprintf_func) (info->stream, ".word 0x%x",
+			     (buffer[0] << 8) + buffer[1]);
+      return 2;
+    }
+
+  /* Point at first byte of argument data, and at descriptor for first
+     argument.  */
+  arg = buffer + ((votp->detail.code >> 8) ? 2 : 1);
+
+  /* Make sure we have it in mem */
+  FETCH_DATA (info, arg);
+
+  (*info->fprintf_func) (info->stream, "%s", votp->name);
+  if (*argp)
+    (*info->fprintf_func) (info->stream, " ");
+
+  while (*argp)
+    {
+      arg += print_insn_arg (argp, arg, memaddr + arg - buffer, info);
+      argp += 2;
+      if (*argp)
+	(*info->fprintf_func) (info->stream, ",");
+    }
+
+  return arg - buffer;
+}
+
+/* Returns number of bytes "eaten" by the operand, or return -1 if an
+   invalid operand was found, or -2 if an opcode tabel error was
+   found. */
+
+static int
+print_insn_arg (d, p0, addr, info)
+     const char *d;
+     unsigned char *p0;
+     bfd_vma addr;		/* PC for this arg to be relative to */
+     disassemble_info *info;
+{
+  int arg_len;
+
+  /* check validity of addressing length */
+  switch (d[1])
+    {
+    case 'b' : arg_len = 1;	break;
+    case 'd' : arg_len = 8;	break;
+    case 'f' : arg_len = 4;	break;
+    case 'g' : arg_len = 8;	break;
+    case 'h' : arg_len = 16;	break;
+    case 'l' : arg_len = 4;	break;
+    case 'o' : arg_len = 16;	break;
+    case 'w' : arg_len = 2;	break;
+    case 'q' : arg_len = 8;	break;
+    default  : abort();
+    }
+
+  /* branches have no mode byte */
+  if (d[0] == 'b')
+    {
+      unsigned char *p = p0;
+
+      if (arg_len == 1)
+	(*info->print_address_func) (addr + 1 + NEXTBYTE (p), info);
+      else
+	(*info->print_address_func) (addr + 2 + NEXTWORD (p), info);
+
+      return p - p0;
+    }
+
+  return print_insn_mode (arg_len, p0, addr, info);
+}
+
+static int
+print_insn_mode (size, p0, addr, info)
+     int size;
+     unsigned char *p0;
+     bfd_vma addr;		/* PC for this arg to be relative to */
+     disassemble_info *info;
+{
+  unsigned char *p = p0;
+  unsigned char mode, reg;
+
+  /* fetch and interpret mode byte */
+  mode = (unsigned char) NEXTBYTE (p);
+  reg = mode & 0xF;
+  switch (mode & 0xF0)
+    {
+    case 0x00:
+    case 0x10:
+    case 0x20:
+    case 0x30: /* literal mode			$number */
+      (*info->fprintf_func) (info->stream, "$0x%x", mode);
+      break;
+    case 0x40: /* index:			base-addr[Rn] */
+      p += print_insn_mode (size, p0 + 1, addr + 1, info);
+      (*info->fprintf_func) (info->stream, "[%s]", reg_names[reg]);
+      break;
+    case 0x50: /* register:			Rn */
+      (*info->fprintf_func) (info->stream, "%s", reg_names[reg]);
+      break;
+    case 0x60: /* register deferred:		(Rn) */
+      (*info->fprintf_func) (info->stream, "(%s)", reg_names[reg]);
+      break;
+    case 0x70: /* autodecrement:		-(Rn) */
+      (*info->fprintf_func) (info->stream, "-(%s)", reg_names[reg]);
+      break;
+    case 0x80: /* autoincrement:		(Rn)+ */
+      if (reg == 0xF)
+	{	/* immediate? */
+	  int i;
+
+	  FETCH_DATA (info, p + size);
+	  (*info->fprintf_func) (info->stream, "$0x");
+	  for (i = 0; i < size; i++)
+	    (*info->fprintf_func) (info->stream, "%02x", p[size - i - 1]);
+	  p += size;
+	}
+      else
+	(*info->fprintf_func) (info->stream, "(%s)+", reg_names[reg]);
+      break;
+    case 0x90: /* autoincrement deferred:	@(Rn)+ */
+      if (reg == 0xF)
+	(*info->fprintf_func) (info->stream, "*0x%x", NEXTLONG (p));
+      else
+	(*info->fprintf_func) (info->stream, "@(%s)+", reg_names[reg]);
+      break;
+    case 0xB0: /* displacement byte deferred:	*displ(Rn) */
+      (*info->fprintf_func) (info->stream, "*");
+    case 0xA0: /* displacement byte:		displ(Rn) */
+      if (reg == 0xF)
+	(*info->print_address_func) (addr + 2 + NEXTBYTE (p), info);
+      else
+	(*info->fprintf_func) (info->stream, "0x%x(%s)", NEXTBYTE (p),
+			       reg_names[reg]);
+      break;
+    case 0xD0: /* displacement word deferred:	*displ(Rn) */
+      (*info->fprintf_func) (info->stream, "*");
+    case 0xC0: /* displacement word:		displ(Rn) */
+      if (reg == 0xF)
+	(*info->print_address_func) (addr + 3 + NEXTWORD (p), info);
+      else
+	(*info->fprintf_func) (info->stream, "0x%x(%s)", NEXTWORD (p),
+			       reg_names[reg]);
+      break;
+    case 0xF0: /* displacement long deferred:	*displ(Rn) */
+      (*info->fprintf_func) (info->stream, "*");
+    case 0xE0: /* displacement long:		displ(Rn) */
+      if (reg == 0xF)
+	(*info->print_address_func) (addr + 5 + NEXTLONG (p), info);
+      else
+	(*info->fprintf_func) (info->stream, "0x%x(%s)", NEXTLONG (p),
+			       reg_names[reg]);
+      break;
+    }
+
+  return p - p0;
+}