Add new binutils target: moxie

4 files changed, 787 insertions, 0 deletions

diff --git a/gas/ChangeLog b/gas/ChangeLog
index b837c17..a3442b3 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,10 @@
+2008-04-15  Anthony Green  <green@moxielogic.com>
+
+	* config/tc-moxie.h: New file.
+	* config/tc-moxie.c: New file.
+	* configure: Add support for moxie.
+	* configure.tgt: Add support for moxie.
+
 2009-04-16  Jan Beulich  <jbeulich@novell.com>
 
 	* expr.c: Include limits.h if available, and #define CHAR_BITS
diff --git a/gas/config/tc-moxie.c b/gas/config/tc-moxie.c
new file mode 100644
index 0000000..84563ce
--- /dev/null
+++ b/gas/config/tc-moxie.c
@@ -0,0 +1,731 @@
+/* tc-moxie.c -- Assemble code for moxie
+   Copyright 2009
+   Free Software Foundation, Inc.
+
+   This file is part of GAS, the GNU Assembler.
+
+   GAS 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.
+
+   GAS 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 GAS; see the file COPYING.  If not, write to
+   the Free Software Foundation, 51 Franklin Street - Fifth Floor,
+   Boston, MA 02110-1301, USA.  */
+
+/* Contributed by Anthony Green <green@moxielogic.com>.  */
+
+#include "as.h"
+#include "safe-ctype.h"
+#include "opcode/moxie.h"
+#include "elf/moxie.h"
+
+extern const moxie_opc_info_t moxie_opc_info[128];
+
+const char comment_chars[]        = "#";
+const char line_separator_chars[] = ";";
+const char line_comment_chars[]   = "#";
+
+static int pending_reloc;
+static struct hash_control *opcode_hash_control;
+
+const pseudo_typeS md_pseudo_table[] =
+{
+  {0, 0, 0}
+};
+
+const char FLT_CHARS[] = "rRsSfFdDxXpP";
+const char EXP_CHARS[] = "eE";
+
+void
+md_operand (expressionS *op __attribute__((unused)))
+{
+  /* Empty for now. */
+}
+
+/* This function is called once, at assembler startup time.  It sets
+   up the hash table with all the opcodes in it, and also initializes
+   some aliases for compatibility with other assemblers.  */
+
+void
+md_begin (void)
+{
+  int count;
+  const moxie_opc_info_t *opcode;
+  opcode_hash_control = hash_new ();
+
+  /* Insert names into hash table.  */
+  for (count = 0, opcode = moxie_form1_opc_info; count++ < 64; opcode++)
+    hash_insert (opcode_hash_control, opcode->name, (char *) opcode);
+
+  for (count = 0, opcode = moxie_form2_opc_info; count++ < 4; opcode++)
+    hash_insert (opcode_hash_control, opcode->name, (char *) opcode);
+
+  for (count = 0, opcode = moxie_form3_opc_info; count++ < 4; opcode++)
+    hash_insert (opcode_hash_control, opcode->name, (char *) opcode);
+
+  bfd_set_arch_mach (stdoutput, TARGET_ARCH, 0);
+}
+
+/* Parse an expression and then restore the input line pointer.  */
+
+static char *
+parse_exp_save_ilp (char *s, expressionS *op)
+{
+  char *save = input_line_pointer;
+
+  input_line_pointer = s;
+  expression (op);
+  s = input_line_pointer;
+  input_line_pointer = save;
+  return s;
+}
+
+static int
+parse_register_operand (char **ptr)
+{
+  int reg;
+  char *s = *ptr;
+
+  if (*s != '$')
+    {
+      as_bad ("expecting register");
+      ignore_rest_of_line ();
+      return -1;
+    }
+  if (s[1] == 'f' && s[2] == 'p')
+    {
+      *ptr += 3;
+      return 0;
+    }
+  if (s[1] == 's' && s[2] == 'p')
+    {
+      *ptr += 3;
+      return 1;
+    }
+  if (s[1] == 'r')
+    {
+      reg = s[2] - '0';
+      if ((reg < 0) || (reg > 9))
+	{
+	  as_bad ("illegal register number");
+	  ignore_rest_of_line ();
+	  return -1;
+	}
+      if (reg == 1)
+	{
+	  int r2 = s[3] - '0';
+	  if ((r2 >= 0) && (r2 <= 3))
+	    {
+	      reg = 10 + r2;
+	      *ptr += 1;
+	    }
+	}
+    }
+  else
+    {
+      as_bad ("illegal register number");
+      ignore_rest_of_line ();
+      return -1;
+    }
+
+  *ptr += 3;
+
+  return reg + 2;
+}
+
+/* This is the guts of the machine-dependent assembler.  STR points to
+   a machine dependent instruction.  This function is supposed to emit
+   the frags/bytes it assembles to.  */
+
+void
+md_assemble (char *str)
+{
+  char *op_start;
+  char *op_end;
+
+  moxie_opc_info_t *opcode;
+  char *p;
+  char pend;
+
+  unsigned short iword = 0;
+
+  int nlen = 0;
+
+  /* Drop leading whitespace.  */
+  while (*str == ' ')
+    str++;
+
+  /* Find the op code end.  */
+  op_start = str;
+  for (op_end = str;
+       *op_end && !is_end_of_line[*op_end & 0xff] && *op_end != ' ';
+       op_end++)
+    nlen++;
+
+  pend = *op_end;
+  *op_end = 0;
+
+  if (nlen == 0)
+    as_bad (_("can't find opcode "));
+  opcode = (moxie_opc_info_t *) hash_find (opcode_hash_control, op_start);
+  *op_end = pend;
+
+  if (opcode == NULL)
+    {
+      as_bad (_("unknown opcode %s"), op_start);
+      return;
+    }
+
+  p = frag_more (2);
+
+  switch (opcode->itype)
+    {
+    case MOXIE_F2_A8V:
+      iword = (1<<15) | (opcode->opcode << 12);
+      while (ISSPACE (*op_end))
+	op_end++;
+      {
+	expressionS arg;
+	int reg;
+	reg = parse_register_operand (&op_end);
+	iword += (reg << 8);
+	if (*op_end != ',')
+	  as_warn ("expecting comma delimeted register operands");
+	op_end++;
+	op_end = parse_exp_save_ilp (op_end, &arg);
+	fix_new_exp (frag_now,
+		     ((p+1) - frag_now->fr_literal),
+		     1,
+		     &arg,
+		     0,
+		     BFD_RELOC_8);
+      }
+      break;
+    case MOXIE_F1_AB:
+      iword = opcode->opcode << 8;
+      while (ISSPACE (*op_end))
+	op_end++;
+      {
+	int dest, src;
+	dest = parse_register_operand (&op_end);
+	if (*op_end != ',')
+	  as_warn ("expecting comma delimeted register operands");
+	op_end++;
+	src  = parse_register_operand (&op_end);
+	iword += (dest << 4) + src;
+	while (ISSPACE (*op_end))
+	  op_end++;
+	if (*op_end != 0)
+	  as_warn ("extra stuff on line ignored");
+      }
+      break;
+    case MOXIE_F1_A4:
+      iword = opcode->opcode << 8;
+      while (ISSPACE (*op_end))
+	op_end++;
+      {
+	expressionS arg;
+	char *where;
+	int regnum;
+
+ 	regnum = parse_register_operand (&op_end);
+	while (ISSPACE (*op_end))
+	  op_end++;
+
+	iword += (regnum << 4);
+
+	if (*op_end != ',')
+	  {
+	    as_bad ("expecting comma delimited operands");
+	    ignore_rest_of_line ();
+	    return;
+	  }
+	op_end++;
+
+	op_end = parse_exp_save_ilp (op_end, &arg);
+	where = frag_more (4);
+	fix_new_exp (frag_now,
+		     (where - frag_now->fr_literal),
+		     4,
+		     &arg,
+		     0,
+		     BFD_RELOC_32);
+      }
+      break;
+    case MOXIE_F1_4:
+      iword = opcode->opcode << 8;
+      while (ISSPACE (*op_end))
+	op_end++;
+      {
+	expressionS arg;
+	char *where;
+
+	op_end = parse_exp_save_ilp (op_end, &arg);
+	where = frag_more (4);
+	fix_new_exp (frag_now,
+		     (where - frag_now->fr_literal),
+		     4,
+		     &arg,
+		     0,
+		     BFD_RELOC_32);
+      }
+      break;
+    case MOXIE_F1_NARG:
+      iword = opcode->opcode << 8;
+      while (ISSPACE (*op_end))
+	op_end++;
+      if (*op_end != 0)
+	as_warn ("extra stuff on line ignored");
+      break;
+    case MOXIE_F1_A:
+      iword = opcode->opcode << 8;
+      while (ISSPACE (*op_end))
+	op_end++;
+      {
+	int reg;
+	reg = parse_register_operand (&op_end);
+	while (ISSPACE (*op_end))
+	  op_end++;
+	if (*op_end != 0)
+	  as_warn ("extra stuff on line ignored");
+	iword += (reg << 4);
+      }
+      break;
+    case MOXIE_F1_ABi:
+      iword = opcode->opcode << 8;
+      while (ISSPACE (*op_end))
+	op_end++;
+      {
+	int a, b;
+	a = parse_register_operand (&op_end);
+	if (*op_end != ',')
+	  as_warn ("expecting comma delimeted register operands");
+	op_end++;
+	if (*op_end != '(')
+	  {
+	    as_bad ("expecting indirect register `($rA)'");
+	    ignore_rest_of_line ();
+	    return;
+	  }
+	op_end++;
+	b = parse_register_operand (&op_end);
+	if (*op_end != ')')
+	  {
+	    as_bad ("missing closing parenthesis");
+	    ignore_rest_of_line ();
+	    return;
+	  }
+	op_end++;
+	iword += (a << 4) + b;
+	while (ISSPACE (*op_end))
+	  op_end++;
+	if (*op_end != 0)
+	  as_warn ("extra stuff on line ignored");
+      }
+      break;
+    case MOXIE_F1_AiB:
+      iword = opcode->opcode << 8;
+      while (ISSPACE (*op_end))
+	op_end++;
+      {
+	int a, b;
+	if (*op_end != '(')
+	  {
+	    as_bad ("expecting indirect register `($rA)'");
+	    ignore_rest_of_line ();
+	    return;
+	  }
+	op_end++;
+	a = parse_register_operand (&op_end);
+	if (*op_end != ')')
+	  {
+	    as_bad ("missing closing parenthesis");
+	    ignore_rest_of_line ();
+	    return;
+	  }
+	op_end++;
+	if (*op_end != ',')
+	  as_warn ("expecting comma delimeted register operands");
+	op_end++;
+	b = parse_register_operand (&op_end);
+	iword += (a << 4) + b;
+	while (ISSPACE (*op_end))
+	  op_end++;
+	if (*op_end != 0)
+	  as_warn ("extra stuff on line ignored");
+      }
+      break;
+    case MOXIE_F1_4A:
+      iword = opcode->opcode << 8;
+      while (ISSPACE (*op_end))
+	op_end++;
+      {
+	expressionS arg;
+	char *where;
+	int a;
+
+	op_end = parse_exp_save_ilp (op_end, &arg);
+	where = frag_more (4);
+	fix_new_exp (frag_now,
+		     (where - frag_now->fr_literal),
+		     4,
+		     &arg,
+		     0,
+		     BFD_RELOC_32);
+
+	if (*op_end != ',')
+	  {
+	    as_bad ("expecting comma delimited operands");
+	    ignore_rest_of_line ();
+	    return;
+	  }
+	op_end++;
+
+ 	a = parse_register_operand (&op_end);
+	while (ISSPACE (*op_end))
+	  op_end++;
+	if (*op_end != 0)
+	  as_warn ("extra stuff on line ignored");
+
+	iword += (a << 4);
+      }
+      break;
+    case MOXIE_F1_ABi4:
+      iword = opcode->opcode << 8;
+      while (ISSPACE (*op_end))
+	op_end++;
+      {
+	expressionS arg;
+	char *offset;
+	int a, b;
+
+ 	a = parse_register_operand (&op_end);
+	while (ISSPACE (*op_end))
+	  op_end++;
+
+	if (*op_end != ',')
+	  {
+	    as_bad ("expecting comma delimited operands");
+	    ignore_rest_of_line ();
+	    return;
+	  }
+	op_end++;
+
+	op_end = parse_exp_save_ilp (op_end, &arg);
+	offset = frag_more (4);
+	fix_new_exp (frag_now,
+		     (offset - frag_now->fr_literal),
+		     4,
+		     &arg,
+		     0,
+		     BFD_RELOC_32);
+
+	if (*op_end != '(')
+	  {
+	    as_bad ("expecting indirect register `($rX)'");
+	    ignore_rest_of_line ();
+	    return;
+	  }
+	op_end++;
+	b = parse_register_operand (&op_end);
+	if (*op_end != ')')
+	  {
+	    as_bad ("missing closing parenthesis");
+	    ignore_rest_of_line ();
+	    return;
+	  }
+	op_end++;
+
+	while (ISSPACE (*op_end))
+	  op_end++;
+	if (*op_end != 0)
+	  as_warn ("extra stuff on line ignored");
+
+	iword += (a << 4) + b;
+      }
+      break;
+    case MOXIE_F1_AiB4:
+      iword = opcode->opcode << 8;
+      while (ISSPACE (*op_end))
+	op_end++;
+      {
+	expressionS arg;
+	char *offset;
+	int a, b;
+
+	op_end = parse_exp_save_ilp (op_end, &arg);
+	offset = frag_more (4);
+	fix_new_exp (frag_now,
+		     (offset - frag_now->fr_literal),
+		     4,
+		     &arg,
+		     0,
+		     BFD_RELOC_32);
+
+	if (*op_end != '(')
+	  {
+	    as_bad ("expecting indirect register `($rX)'");
+	    ignore_rest_of_line ();
+	    return;
+	  }
+	op_end++;
+	a = parse_register_operand (&op_end);
+	if (*op_end != ')')
+	  {
+	    as_bad ("missing closing parenthesis");
+	    ignore_rest_of_line ();
+	    return;
+	  }
+	op_end++;
+
+	if (*op_end != ',')
+	  {
+	    as_bad ("expecting comma delimited operands");
+	    ignore_rest_of_line ();
+	    return;
+	  }
+	op_end++;
+
+ 	b = parse_register_operand (&op_end);
+	while (ISSPACE (*op_end))
+	  op_end++;
+
+	while (ISSPACE (*op_end))
+	  op_end++;
+	if (*op_end != 0)
+	  as_warn ("extra stuff on line ignored");
+
+	iword += (a << 4) + b;
+      }
+      break;
+    case MOXIE_F2_NARG:
+      iword = opcode->opcode << 12;
+      while (ISSPACE (*op_end))
+	op_end++;
+      if (*op_end != 0)
+	as_warn ("extra stuff on line ignored");
+      break;
+    default:
+      abort();
+    }
+
+  md_number_to_chars (p, iword, 2);
+
+  while (ISSPACE (*op_end))
+    op_end++;
+
+  if (*op_end != 0)
+    as_warn ("extra stuff on line ignored");
+
+  if (pending_reloc)
+    as_bad ("Something forgot to clean up\n");
+}
+
+/* Turn a string in input_line_pointer into a floating point constant
+   of type type, and store the appropriate bytes in *LITP.  The number
+   of LITTLENUMS emitted is stored in *SIZEP .  An error message is
+   returned, or NULL on OK.  */
+
+char *
+md_atof (int type, char *litP, int *sizeP)
+{
+  int prec;
+  LITTLENUM_TYPE words[4];
+  char *t;
+  int i;
+
+  switch (type)
+    {
+    case 'f':
+      prec = 2;
+      break;
+
+    case 'd':
+      prec = 4;
+      break;
+
+    default:
+      *sizeP = 0;
+      return _("bad call to md_atof");
+    }
+
+  t = atof_ieee (input_line_pointer, type, words);
+  if (t)
+    input_line_pointer = t;
+
+  *sizeP = prec * 2;
+
+  for (i = prec - 1; i >= 0; i--)
+    {
+      md_number_to_chars (litP, (valueT) words[i], 2);
+      litP += 2;
+    }
+
+  return NULL;
+}
+
+const char *md_shortopts = "";
+
+struct option md_longopts[] =
+{
+  {NULL, no_argument, NULL, 0}
+};
+size_t md_longopts_size = sizeof (md_longopts);
+
+/* We have no target specific options yet, so these next
+   two functions are empty.  */
+int
+md_parse_option (int c ATTRIBUTE_UNUSED, char *arg ATTRIBUTE_UNUSED)
+{
+  return 0;
+}
+
+void
+md_show_usage (FILE *stream ATTRIBUTE_UNUSED)
+{
+}
+
+/* Apply a fixup to the object file.  */
+
+void
+md_apply_fix (fixS *fixP ATTRIBUTE_UNUSED, valueT * valP ATTRIBUTE_UNUSED, segT seg ATTRIBUTE_UNUSED)
+{
+  char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
+  long val = *valP;
+  long max, min;
+  int shift;
+
+  max = min = 0;
+  shift = 0;
+  switch (fixP->fx_r_type)
+    {
+    case BFD_RELOC_32:
+      *buf++ = val >> 24;
+      *buf++ = val >> 16;
+      *buf++ = val >> 8;
+      *buf++ = val >> 0;
+      break;
+
+    case BFD_RELOC_16:
+      *buf++ = val >> 8;
+      *buf++ = val >> 0;
+      break;
+
+    case BFD_RELOC_8:
+      *buf++ = val;
+      break;
+
+    default:
+      abort ();
+    }
+
+  if (max != 0 && (val < min || val > max))
+    as_bad_where (fixP->fx_file, fixP->fx_line, _("offset out of range"));
+
+  if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0)
+    fixP->fx_done = 1;
+}
+
+/* Put number into target byte order (big endian).  */
+
+void
+md_number_to_chars (char *ptr, valueT use, int nbytes)
+{
+  number_to_chars_bigendian (ptr, use, nbytes);
+}
+
+/* Generate a machine-dependent relocation.  */
+arelent *
+tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixP)
+{
+  arelent *relP;
+  bfd_reloc_code_real_type code;
+
+  switch (fixP->fx_r_type)
+    {
+    case BFD_RELOC_32:
+      code = fixP->fx_r_type;
+      break;
+    default:
+      as_bad_where (fixP->fx_file, fixP->fx_line,
+		    _("Semantics error.  This type of operand can not be relocated, it must be an assembly-time constant"));
+      return 0;
+    }
+
+  relP = xmalloc (sizeof (arelent));
+  assert (relP != 0);
+  relP->sym_ptr_ptr = xmalloc (sizeof (asymbol *));
+  *relP->sym_ptr_ptr = symbol_get_bfdsym (fixP->fx_addsy);
+  relP->address = fixP->fx_frag->fr_address + fixP->fx_where;
+
+  relP->addend = fixP->fx_offset;
+
+  /* This is the standard place for KLUDGEs to work around bugs in
+     bfd_install_relocation (first such note in the documentation
+     appears with binutils-2.8).
+
+     That function bfd_install_relocation does the wrong thing with
+     putting stuff into the addend of a reloc (it should stay out) for a
+     weak symbol.  The really bad thing is that it adds the
+     "segment-relative offset" of the symbol into the reloc.  In this
+     case, the reloc should instead be relative to the symbol with no
+     other offset than the assembly code shows; and since the symbol is
+     weak, any local definition should be ignored until link time (or
+     thereafter).
+     To wit:  weaksym+42  should be weaksym+42 in the reloc,
+     not weaksym+(offset_from_segment_of_local_weaksym_definition)
+
+     To "work around" this, we subtract the segment-relative offset of
+     "known" weak symbols.  This evens out the extra offset.
+
+     That happens for a.out but not for ELF, since for ELF,
+     bfd_install_relocation uses the "special function" field of the
+     howto, and does not execute the code that needs to be undone.  */
+
+  if (OUTPUT_FLAVOR == bfd_target_aout_flavour
+      && fixP->fx_addsy && S_IS_WEAK (fixP->fx_addsy)
+      && ! bfd_is_und_section (S_GET_SEGMENT (fixP->fx_addsy)))
+    {
+      relP->addend -= S_GET_VALUE (fixP->fx_addsy);
+    }
+
+  relP->howto = bfd_reloc_type_lookup (stdoutput, code);
+  if (! relP->howto)
+    {
+      const char *name;
+
+      name = S_GET_NAME (fixP->fx_addsy);
+      if (name == NULL)
+	name = _("<unknown>");
+      as_fatal (_("Cannot generate relocation type for symbol %s, code %s"),
+		name, bfd_get_reloc_code_name (code));
+    }
+
+  return relP;
+}
+
+/* Decide from what point a pc-relative relocation is relative to,
+   relative to the pc-relative fixup.  Er, relatively speaking.  */
+long
+md_pcrel_from (fixS *fixP)
+{
+  valueT addr = fixP->fx_where + fixP->fx_frag->fr_address;
+
+  fprintf (stderr, "md_pcrel_from 0x%d\n", fixP->fx_r_type);
+
+  switch (fixP->fx_r_type)
+    {
+    case BFD_RELOC_32:
+      return addr + 4;
+    default:
+      abort ();
+      return addr;
+    }
+}
diff --git a/gas/config/tc-moxie.h b/gas/config/tc-moxie.h
new file mode 100644
index 0000000..db1d01a
--- /dev/null
+++ b/gas/config/tc-moxie.h
@@ -0,0 +1,47 @@
+/* tc-moxie.h -- Header file for tc-moxie.c.
+
+   Copyright 2009 Free Software Foundation, Inc.
+
+   This file is part of GAS, the GNU Assembler.
+
+   GAS 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.
+
+   GAS 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 GAS; see the file COPYING.  If not, write to the Free Software
+   Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#define TC_MOXIE 1
+#define TARGET_BYTES_BIG_ENDIAN 1
+#define WORKING_DOT_WORD
+
+/* This macro is the BFD target name to use when creating the output
+   file.  This will normally depend upon the `OBJ_FMT' macro.  */
+#define TARGET_FORMAT "elf32-moxie"
+
+/* This macro is the BFD architecture to pass to `bfd_set_arch_mach'.  */
+#define TARGET_ARCH bfd_arch_moxie
+
+#define md_undefined_symbol(NAME)           0
+
+/* These macros must be defined, but is will be a fatal assembler
+   error if we ever hit them.  */
+#define md_estimate_size_before_relax(A, B) (as_fatal (_("estimate size\n")), 0)
+#define md_convert_frag(B, S, F)            (as_fatal (_("convert_frag\n")), 0)
+
+/* If you define this macro, it should return the offset between the
+   address of a PC relative fixup and the position from which the PC
+   relative adjustment should be made.  On many processors, the base
+   of a PC relative instruction is the next instruction, so this
+   macro would return the length of an instruction.  */
+#define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from (FIX)
+extern long md_pcrel_from (struct fix *);
+
+#define md_section_align(SEGMENT, SIZE)     (SIZE)
diff --git a/gas/configure.tgt b/gas/configure.tgt
index e3eadac..9d722ed 100644
--- a/gas/configure.tgt
+++ b/gas/configure.tgt
@@ -148,6 +148,8 @@ case ${generic_target} in
   frv-*-*linux*)			fmt=elf em=linux;;
   frv-*-*)				fmt=elf ;;
 
+  moxie-*-*)                             fmt=elf ;;
+
   hppa-*-linux*)
     case ${cpu} in
       hppa*64*)				fmt=elf em=hppalinux64 ;;