Initial checkin of unmodified binutils 2.22.

Change-Id: I8c1bf4cf62df8eb16439021f1a1bac6437f5c470

1 files changed, 487 insertions, 0 deletions

diff --git a/binutils-2.22/opcodes/vax-dis.c b/binutils-2.22/opcodes/vax-dis.c
new file mode 100644
index 00000000..a119f054
--- /dev/null
+++ b/binutils-2.22/opcodes/vax-dis.c
@@ -0,0 +1,487 @@
+/* Print VAX instructions.
+   Copyright 1995, 1998, 2000, 2001, 2002, 2005, 2007, 2009
+   Free Software Foundation, Inc.
+   Contributed by Pauline Middelink <middelin@polyware.iaf.nl>
+
+   This file is part of the GNU opcodes library.
+
+   This library 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 3, or (at your option)
+   any later version.
+
+   It 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., 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
+
+#include <setjmp.h>
+#include <string.h>
+#include "sysdep.h"
+#include "opcode/vax.h"
+#include "dis-asm.h"
+
+static char *reg_names[] =
+{
+  "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
+  "r8", "r9", "r10", "r11", "ap", "fp", "sp", "pc"
+};
+
+/* Definitions for the function entry mask bits.  */
+static char *entry_mask_bit[] =
+{
+  /* Registers 0 and 1 shall not be saved, since they're used to pass back
+     a function's result to its caller...  */
+  "~r0~", "~r1~",
+  /* Registers 2 .. 11 are normal registers.  */
+  "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11",
+  /* Registers 12 and 13 are argument and frame pointer and must not
+     be saved by using the entry mask.  */
+  "~ap~", "~fp~",
+  /* Bits 14 and 15 control integer and decimal overflow.  */
+  "IntOvfl", "DecOvfl",
+};
+
+/* Sign-extend an (unsigned char). */
+#define COERCE_SIGNED_CHAR(ch) ((signed char)(ch))
+
+/* 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
+
+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 (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;
+}
+
+/* Entry mask handling.  */
+static unsigned int  entry_addr_occupied_slots = 0;
+static unsigned int  entry_addr_total_slots = 0;
+static bfd_vma *     entry_addr = NULL;
+
+/* Parse the VAX specific disassembler options.  These contain function
+   entry addresses, which can be useful to disassemble ROM images, since
+   there's no symbol table.  Returns TRUE upon success, FALSE otherwise.  */
+
+static bfd_boolean
+parse_disassembler_options (char * options)
+{
+  const char * entry_switch = "entry:";
+
+  while ((options = strstr (options, entry_switch)))
+    {
+      options += strlen (entry_switch);
+
+      /* The greater-than part of the test below is paranoia.  */
+      if (entry_addr_occupied_slots >= entry_addr_total_slots)
+	{
+	  /* A guesstimate of the number of entries we will have to create.  */
+	  entry_addr_total_slots +=
+	    strlen (options) / (strlen (entry_switch) + 5);
+	  
+	  entry_addr = realloc (entry_addr, sizeof (bfd_vma)
+				* entry_addr_total_slots);
+	}
+
+      if (entry_addr == NULL)
+	return FALSE;
+	  
+      entry_addr[entry_addr_occupied_slots] = bfd_scan_vma (options, NULL, 0);
+      entry_addr_occupied_slots ++;
+    }
+
+  return TRUE;
+}
+
+#if 0 /* FIXME:  Ideally the disassembler should have target specific
+	 initialisation and termination function pointers.  Then
+	 parse_disassembler_options could be the init function and
+	 free_entry_array (below) could be the termination routine.
+	 Until then there is no way for the disassembler to tell us
+	 that it has finished and that we no longer need the entry
+	 array, so this routine is suppressed for now.  It does mean
+	 that we leak memory, but only to the extent that we do not
+	 free it just before the disassembler is about to terminate
+	 anyway.  */
+
+/* Free memory allocated to our entry array.  */
+
+static void
+free_entry_array (void)
+{
+  if (entry_addr)
+    {
+      free (entry_addr);
+      entry_addr = NULL;
+      entry_addr_occupied_slots = entry_addr_total_slots = 0;
+    }
+}
+#endif
+/* Check if the given address is a known function entry point.  This is
+   the case if there is a symbol of the function type at this address.
+   We also check for synthetic symbols as these are used for PLT entries
+   (weak undefined symbols may not have the function type set).  Finally
+   the address may have been forced to be treated as an entry point.  The
+   latter helps in disassembling ROM images, because there's no symbol
+   table at all.  Forced entry points can be given by supplying several
+   -M options to objdump: -M entry:0xffbb7730.  */
+
+static bfd_boolean
+is_function_entry (struct disassemble_info *info, bfd_vma addr)
+{
+  unsigned int i;
+
+  /* Check if there's a function or PLT symbol at our address.  */
+  if (info->symbols
+      && info->symbols[0]
+      && (info->symbols[0]->flags & (BSF_FUNCTION | BSF_SYNTHETIC))
+      && addr == bfd_asymbol_value (info->symbols[0]))
+    return TRUE;
+
+  /* Check for forced function entry address.  */
+  for (i = entry_addr_occupied_slots; i--;)
+    if (entry_addr[i] == addr)
+      return TRUE;
+
+  return FALSE;
+}
+
+/* Check if the given address is the last longword of a PLT entry.
+   This longword is data and depending on the value it may interfere
+   with disassembly of further PLT entries.  We make use of the fact
+   PLT symbols are marked BSF_SYNTHETIC.  */
+static bfd_boolean
+is_plt_tail (struct disassemble_info *info, bfd_vma addr)
+{
+  if (info->symbols
+      && info->symbols[0]
+      && (info->symbols[0]->flags & BSF_SYNTHETIC)
+      && addr == bfd_asymbol_value (info->symbols[0]) + 8)
+    return TRUE;
+
+  return FALSE;
+}
+
+static int
+print_insn_mode (const char *d,
+		 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.  */
+      if (d[1] == 'd' || d[1] == 'f' || d[1] == 'g' || d[1] == 'h')
+	(*info->fprintf_func) (info->stream, "$0x%x [%c-float]", mode, d[1]);
+      else
+        (*info->fprintf_func) (info->stream, "$0x%x", mode);
+      break;
+    case 0x40: /* Index:			base-addr[Rn] */
+      p += print_insn_mode (d, 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");
+	  if (d[1] == 'd' || d[1] == 'f' || d[1] == 'g' || d[1] == 'h')
+	    {
+	      int float_word;
+
+	      float_word = p[0] | (p[1] << 8);
+	      if ((d[1] == 'd' || d[1] == 'f')
+		  && (float_word & 0xff80) == 0x8000)
+		{
+		  (*info->fprintf_func) (info->stream, "[invalid %c-float]",
+					 d[1]);
+		}
+	      else
+		{
+	          for (i = 0; i < size; i++)
+		    (*info->fprintf_func) (info->stream, "%02x",
+		                           p[size - i - 1]);
+	          (*info->fprintf_func) (info->stream, " [%c-float]", d[1]);
+		}
+	    }
+	  else
+	    {
+	      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;
+}
+
+/* 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 (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 (d, arg_len, p0, addr, info);
+}
+
+/* Print the vax instruction at address MEMADDR in debugged memory,
+   on INFO->STREAM.  Returns length of the instruction, in bytes.  */
+
+int
+print_insn_vax (bfd_vma memaddr, disassemble_info *info)
+{
+  static bfd_boolean parsed_disassembler_options = FALSE;
+  const struct vot *votp;
+  const char *argp;
+  unsigned char *arg;
+  struct private priv;
+  bfd_byte *buffer = priv.the_buffer;
+
+  info->private_data = & priv;
+  priv.max_fetched = priv.the_buffer;
+  priv.insn_start = memaddr;
+
+  if (! parsed_disassembler_options
+      && info->disassembler_options != NULL)
+    {
+      parse_disassembler_options (info->disassembler_options);
+
+      /* To avoid repeated parsing of these options.  */
+      parsed_disassembler_options = TRUE;
+    }
+
+  if (setjmp (priv.bailout) != 0)
+    /* Error return.  */
+    return -1;
+
+  argp = NULL;
+  /* Check if the info buffer has more than one byte left since
+     the last opcode might be a single byte with no argument data.  */
+  if (info->buffer_length - (memaddr - info->buffer_vma) > 1)
+    {
+      FETCH_DATA (info, buffer + 2);
+    }
+  else
+    {
+      FETCH_DATA (info, buffer + 1);
+      buffer[1] = 0;
+    }
+
+  /* Decode function entry mask.  */
+  if (is_function_entry (info, memaddr))
+    {
+      int i = 0;
+      int register_mask = buffer[1] << 8 | buffer[0];
+
+      (*info->fprintf_func) (info->stream, ".word 0x%04x # Entry mask: <",
+			     register_mask);
+
+      for (i = 15; i >= 0; i--)
+	if (register_mask & (1 << i))
+          (*info->fprintf_func) (info->stream, " %s", entry_mask_bit[i]);
+
+      (*info->fprintf_func) (info->stream, " >");
+
+      return 2;
+    }
+
+  /* Decode PLT entry offset longword.  */
+  if (is_plt_tail (info, memaddr))
+    {
+      int offset;
+
+      FETCH_DATA (info, buffer + 4);
+      offset = buffer[3] << 24 | buffer[2] << 16 | buffer[1] << 8 | buffer[0];
+      (*info->fprintf_func) (info->stream, ".long 0x%08x", offset);
+
+      return 4;
+    }
+
+  for (votp = &votstrs[0]; votp->name[0]; votp++)
+    {
+      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;
+}
+