gas/config/tc-xc16x.c - third_party/binutils-gdb - Git at Google

 /* tc-xc16x.c -- Assembler for the Infineon XC16X.
    Copyright 2006, 2007, 2009  Free Software Foundation, Inc.
    Contributed by KPIT Cummins Infosystems

    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.  */


 #include "as.h"
 #include "safe-ctype.h"
 #include "subsegs.h"
 #include "symcat.h"
 #include "opcodes/xc16x-desc.h"
 #include "opcodes/xc16x-opc.h"
 #include "cgen.h"
 #include "dwarf2dbg.h"


 #ifdef OBJ_ELF
 #include "elf/xc16x.h"
 #endif

 /* Structure to hold all of the different components describing
    an individual instruction.  */
 typedef struct
 {
   const CGEN_INSN *	insn;
   const CGEN_INSN *	orig_insn;
   CGEN_FIELDS		fields;
 #if CGEN_INT_INSN_P
   CGEN_INSN_INT         buffer [1];
 #define INSN_VALUE(buf) (*(buf))
 #else
   unsigned char buffer [CGEN_MAX_INSN_SIZE];
 #define INSN_VALUE(buf) (buf)
 #endif
   char *		addr;
   fragS *		frag;
   int  			num_fixups;
   fixS *		fixups [GAS_CGEN_MAX_FIXUPS];
   int  			indices [MAX_OPERAND_INSTANCES];
 }
 xc16x_insn;

 const char comment_chars[]        = ";";
 const char line_comment_chars[]   = "#";
 const char line_separator_chars[] = "";
 const char EXP_CHARS[]            = "eE";
 const char FLT_CHARS[]            = "dD";

 #define XC16X_SHORTOPTS ""
 const char * md_shortopts = XC16X_SHORTOPTS;

 struct option md_longopts[] =
 {
   {NULL, no_argument, NULL, 0}
 };
 size_t md_longopts_size = sizeof (md_longopts);

 static void
 xc16xlmode (int arg ATTRIBUTE_UNUSED)
 {
  if (stdoutput != NULL)
   if (!bfd_set_arch_mach (stdoutput, bfd_arch_xc16x, bfd_mach_xc16xl))
     as_warn (_("could not set architecture and machine"));
 }

 static void
 xc16xsmode (int arg ATTRIBUTE_UNUSED)
 {
   if (!bfd_set_arch_mach (stdoutput, bfd_arch_xc16x, bfd_mach_xc16xs))
     as_warn (_("could not set architecture and machine"));
 }

 static void
 xc16xmode (int arg ATTRIBUTE_UNUSED)
 {
   if (!bfd_set_arch_mach (stdoutput, bfd_arch_xc16x, bfd_mach_xc16x))
     as_warn (_("could not set architecture and machine"));
 }

 /* The target specific pseudo-ops which we support.  */
 const pseudo_typeS md_pseudo_table[] =
 {
   { "word",	cons,		2 },
   {"xc16xl",  xc16xlmode,  0},
   {"xc16xs", xc16xsmode, 0},
   {"xc16x",  xc16xmode,  0},
   { NULL, 	NULL, 		0 }
 };

 void
 md_begin (void)
 {
   /* Initialize the `cgen' interface.  */

   /* Set the machine number and endian.  */
   gas_cgen_cpu_desc = xc16x_cgen_cpu_open (CGEN_CPU_OPEN_MACHS, 0,
 					   CGEN_CPU_OPEN_ENDIAN,
 					   CGEN_ENDIAN_LITTLE,
 					   CGEN_CPU_OPEN_END);
   xc16x_cgen_init_asm (gas_cgen_cpu_desc);

   /* This is a callback from cgen to gas to parse operands.  */
   cgen_set_parse_operand_fn (gas_cgen_cpu_desc, gas_cgen_parse_operand);
 }

 void
 md_assemble (char *str)
 {
   xc16x_insn insn;
   char *errmsg;

   /* Initialize GAS's cgen interface for a new instruction.  */
   gas_cgen_init_parse ();

   insn.insn = xc16x_cgen_assemble_insn
     (gas_cgen_cpu_desc, str, & insn.fields, insn.buffer, & errmsg);

   if (!insn.insn)
     {
       as_bad ("%s", errmsg);
       return;
     }

   /* Doesn't really matter what we pass for RELAX_P here.  */
   gas_cgen_finish_insn (insn.insn, insn.buffer,
 			CGEN_FIELDS_BITSIZE (& insn.fields), 1, NULL);
 }

 /* Return the bfd reloc type for OPERAND of INSN at fixup FIXP.
    Returns BFD_RELOC_NONE if no reloc type can be found.
    *FIXP may be modified if desired.  */

 bfd_reloc_code_real_type
 md_cgen_lookup_reloc (const CGEN_INSN *insn ATTRIBUTE_UNUSED,
 		      const CGEN_OPERAND *operand,
 		      fixS *fixP)
 {
   switch (operand->type)
     {
     case XC16X_OPERAND_REL:
       /* ??? Adjust size?  */
       fixP->fx_where += 1;
       fixP->fx_pcrel = 1;
       return BFD_RELOC_8_PCREL;

     case XC16X_OPERAND_CADDR:
       fixP->fx_size = 2;
       fixP->fx_where += 2;
       return BFD_RELOC_16;

     case XC16X_OPERAND_UIMM7:
       /* ??? Adjust size?  */
       fixP->fx_where += 1;
       fixP->fx_pcrel = 1;
       return BFD_RELOC_8_PCREL;

     case XC16X_OPERAND_UIMM16:
     case XC16X_OPERAND_MEMORY:
       fixP->fx_size = 2;
       fixP->fx_where += 2;
       return BFD_RELOC_16;

     case XC16X_OPERAND_UPOF16:
       fixP->fx_size = 2;
       fixP->fx_where += 2;
       return BFD_RELOC_XC16X_POF;

     case XC16X_OPERAND_UPAG16:
       fixP->fx_size = 2;
       fixP->fx_where += 2;
       return BFD_RELOC_XC16X_PAG;

     case XC16X_OPERAND_USEG8:
       /* ??? This is an 8 bit field, why the 16 bit reloc?  */
       fixP->fx_where += 1;
       return BFD_RELOC_XC16X_SEG;

     case XC16X_OPERAND_USEG16:
     case  XC16X_OPERAND_USOF16:
       fixP->fx_size = 2;
       fixP->fx_where += 2;
       return BFD_RELOC_XC16X_SOF;

     default : /* Avoid -Wall warning.  */
       break;
     }

   return BFD_RELOC_NONE;
 }

 /* Write a value out to the object file, using the appropriate endianness.  */

 void
 md_number_to_chars (char * buf, valueT val, int n)
 {
   number_to_chars_littleendian (buf, val, n);
 }

 void
 md_show_usage (FILE * stream)
 {
   fprintf (stream, _(" XC16X specific command line options:\n"));
 }

 int
 md_parse_option (int c ATTRIBUTE_UNUSED,
 		 char *arg ATTRIBUTE_UNUSED)
 {
   return 0;
 }

 char *
 md_atof (int type, char *litP, int *sizeP)
 {
   return ieee_md_atof (type, litP, sizeP, FALSE);
 }

 valueT
 md_section_align (segT segment, valueT size)
 {
   int align = bfd_get_section_alignment (stdoutput, segment);
   return ((size + (1 << align) - 1) & (-1 << align));
 }

 symbolS *
 md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
 {
   return NULL;
 }

 int
 md_estimate_size_before_relax (fragS *fragP ATTRIBUTE_UNUSED,
 			       segT segment_type ATTRIBUTE_UNUSED)
 {
   printf (_("call to md_estimate_size_before_relax \n"));
   abort ();
 }


 long
 md_pcrel_from (fixS *fixP)
 {
   long temp_val;
   temp_val=fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address;

   return temp_val;
 }

 long
 md_pcrel_from_section (fixS *fixP, segT sec)
 {
   if (fixP->fx_addsy != (symbolS *) NULL
       && (! S_IS_DEFINED (fixP->fx_addsy)
 	  || S_GET_SEGMENT (fixP->fx_addsy) != sec
           || S_IS_EXTERNAL (fixP->fx_addsy)
           || S_IS_WEAK (fixP->fx_addsy)))
     {
       return 0;
     }

   return md_pcrel_from (fixP);
 }

 arelent *
 tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixp)
 {
   arelent *rel;
   bfd_reloc_code_real_type r_type;

   if (fixp->fx_addsy && fixp->fx_subsy)
     {
       if ((S_GET_SEGMENT (fixp->fx_addsy) != S_GET_SEGMENT (fixp->fx_subsy))
 	  || S_GET_SEGMENT (fixp->fx_addsy) == undefined_section)
 	{
 	  as_bad_where (fixp->fx_file, fixp->fx_line,
 			_("Difference of symbols in different sections is not supported"));
 	  return NULL;
 	}
     }

   rel = xmalloc (sizeof (arelent));
   rel->sym_ptr_ptr = xmalloc (sizeof (asymbol *));
   *rel->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
   rel->address = fixp->fx_frag->fr_address + fixp->fx_where;
   rel->addend = fixp->fx_offset;

   r_type = fixp->fx_r_type;

 #define DEBUG 0
 #if DEBUG
   fprintf (stderr, "%s\n", bfd_get_reloc_code_name (r_type));
   fflush (stderr);
 #endif

   rel->howto = bfd_reloc_type_lookup (stdoutput, r_type);
    if (rel->howto == NULL)
     {
       as_bad_where (fixp->fx_file, fixp->fx_line,
 		    _("Cannot represent relocation type %s"),
 		    bfd_get_reloc_code_name (r_type));
       return NULL;
     }

   return rel;
 }

 void
 md_apply_fix (fixS *fixP, valueT *valP, segT seg ATTRIBUTE_UNUSED)
 {
   if (!strstr (seg->name,".debug"))
     {
       if (*valP < 128)
 	*valP /= 2;
       if (*valP>268435455)
 	{
 	  *valP = *valP * (-1);
 	  *valP /= 2;
 	  *valP = 256 - (*valP);
 	}
     }

   gas_cgen_md_apply_fix (fixP, valP, seg);
   return;
 }

 void
 md_convert_frag (bfd *headers ATTRIBUTE_UNUSED,
 		 segT seg ATTRIBUTE_UNUSED,
 		 fragS *fragP ATTRIBUTE_UNUSED)
 {
   printf (_("call to md_convert_frag \n"));
   abort ();
 }
	/* tc-xc16x.c -- Assembler for the Infineon XC16X.
	Copyright 2006, 2007, 2009 Free Software Foundation, Inc.
	Contributed by KPIT Cummins Infosystems

	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. */


	#include "as.h"
	#include "safe-ctype.h"
	#include "subsegs.h"
	#include "symcat.h"
	#include "opcodes/xc16x-desc.h"
	#include "opcodes/xc16x-opc.h"
	#include "cgen.h"
	#include "dwarf2dbg.h"


	#ifdef OBJ_ELF
	#include "elf/xc16x.h"
	#endif

	/* Structure to hold all of the different components describing
	an individual instruction. */
	typedef struct
	{
	const CGEN_INSN * insn;
	const CGEN_INSN * orig_insn;
	CGEN_FIELDS fields;
	#if CGEN_INT_INSN_P
	CGEN_INSN_INT buffer [1];
	#define INSN_VALUE(buf) (*(buf))
	#else
	unsigned char buffer [CGEN_MAX_INSN_SIZE];
	#define INSN_VALUE(buf) (buf)
	#endif
	char * addr;
	fragS * frag;
	int num_fixups;
	fixS * fixups [GAS_CGEN_MAX_FIXUPS];
	int indices [MAX_OPERAND_INSTANCES];
	}
	xc16x_insn;

	const char comment_chars[] = ";";
	const char line_comment_chars[] = "#";
	const char line_separator_chars[] = "";
	const char EXP_CHARS[] = "eE";
	const char FLT_CHARS[] = "dD";

	#define XC16X_SHORTOPTS ""
	const char * md_shortopts = XC16X_SHORTOPTS;

	struct option md_longopts[] =
	{
	{NULL, no_argument, NULL, 0}
	};
	size_t md_longopts_size = sizeof (md_longopts);

	static void
	xc16xlmode (int arg ATTRIBUTE_UNUSED)
	{
	if (stdoutput != NULL)
	if (!bfd_set_arch_mach (stdoutput, bfd_arch_xc16x, bfd_mach_xc16xl))
	as_warn (_("could not set architecture and machine"));
	}

	static void
	xc16xsmode (int arg ATTRIBUTE_UNUSED)
	{
	if (!bfd_set_arch_mach (stdoutput, bfd_arch_xc16x, bfd_mach_xc16xs))
	as_warn (_("could not set architecture and machine"));
	}

	static void
	xc16xmode (int arg ATTRIBUTE_UNUSED)
	{
	if (!bfd_set_arch_mach (stdoutput, bfd_arch_xc16x, bfd_mach_xc16x))
	as_warn (_("could not set architecture and machine"));
	}

	/* The target specific pseudo-ops which we support. */
	const pseudo_typeS md_pseudo_table[] =
	{
	{ "word", cons, 2 },
	{"xc16xl", xc16xlmode, 0},
	{"xc16xs", xc16xsmode, 0},
	{"xc16x", xc16xmode, 0},
	{ NULL, NULL, 0 }
	};

	void
	md_begin (void)
	{
	/* Initialize the `cgen' interface. */

	/* Set the machine number and endian. */
	gas_cgen_cpu_desc = xc16x_cgen_cpu_open (CGEN_CPU_OPEN_MACHS, 0,
	CGEN_CPU_OPEN_ENDIAN,
	CGEN_ENDIAN_LITTLE,
	CGEN_CPU_OPEN_END);
	xc16x_cgen_init_asm (gas_cgen_cpu_desc);

	/* This is a callback from cgen to gas to parse operands. */
	cgen_set_parse_operand_fn (gas_cgen_cpu_desc, gas_cgen_parse_operand);
	}

	void
	md_assemble (char *str)
	{
	xc16x_insn insn;
	char *errmsg;

	/* Initialize GAS's cgen interface for a new instruction. */
	gas_cgen_init_parse ();

	insn.insn = xc16x_cgen_assemble_insn
	(gas_cgen_cpu_desc, str, & insn.fields, insn.buffer, & errmsg);

	if (!insn.insn)
	{
	as_bad ("%s", errmsg);
	return;
	}

	/* Doesn't really matter what we pass for RELAX_P here. */
	gas_cgen_finish_insn (insn.insn, insn.buffer,
	CGEN_FIELDS_BITSIZE (& insn.fields), 1, NULL);
	}

	/* Return the bfd reloc type for OPERAND of INSN at fixup FIXP.
	Returns BFD_RELOC_NONE if no reloc type can be found.
	FIXP may be modified if desired. /

	bfd_reloc_code_real_type
	md_cgen_lookup_reloc (const CGEN_INSN *insn ATTRIBUTE_UNUSED,
	const CGEN_OPERAND *operand,
	fixS *fixP)
	{
	switch (operand->type)
	{
	case XC16X_OPERAND_REL:
	/* ??? Adjust size? */
	fixP->fx_where += 1;
	fixP->fx_pcrel = 1;
	return BFD_RELOC_8_PCREL;

	case XC16X_OPERAND_CADDR:
	fixP->fx_size = 2;
	fixP->fx_where += 2;
	return BFD_RELOC_16;

	case XC16X_OPERAND_UIMM7:
	/* ??? Adjust size? */
	fixP->fx_where += 1;
	fixP->fx_pcrel = 1;
	return BFD_RELOC_8_PCREL;

	case XC16X_OPERAND_UIMM16:
	case XC16X_OPERAND_MEMORY:
	fixP->fx_size = 2;
	fixP->fx_where += 2;
	return BFD_RELOC_16;

	case XC16X_OPERAND_UPOF16:
	fixP->fx_size = 2;
	fixP->fx_where += 2;
	return BFD_RELOC_XC16X_POF;

	case XC16X_OPERAND_UPAG16:
	fixP->fx_size = 2;
	fixP->fx_where += 2;
	return BFD_RELOC_XC16X_PAG;

	case XC16X_OPERAND_USEG8:
	/* ??? This is an 8 bit field, why the 16 bit reloc? */
	fixP->fx_where += 1;
	return BFD_RELOC_XC16X_SEG;

	case XC16X_OPERAND_USEG16:
	case XC16X_OPERAND_USOF16:
	fixP->fx_size = 2;
	fixP->fx_where += 2;
	return BFD_RELOC_XC16X_SOF;

	default : /* Avoid -Wall warning. */
	break;
	}

	return BFD_RELOC_NONE;
	}

	/* Write a value out to the object file, using the appropriate endianness. */

	void
	md_number_to_chars (char * buf, valueT val, int n)
	{
	number_to_chars_littleendian (buf, val, n);
	}

	void
	md_show_usage (FILE * stream)
	{
	fprintf (stream, _(" XC16X specific command line options:\n"));
	}

	int
	md_parse_option (int c ATTRIBUTE_UNUSED,
	char *arg ATTRIBUTE_UNUSED)
	{
	return 0;
	}

	char *
	md_atof (int type, char litP, int sizeP)
	{
	return ieee_md_atof (type, litP, sizeP, FALSE);
	}

	valueT
	md_section_align (segT segment, valueT size)
	{
	int align = bfd_get_section_alignment (stdoutput, segment);
	return ((size + (1 << align) - 1) & (-1 << align));
	}

	symbolS *
	md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
	{
	return NULL;
	}

	int
	md_estimate_size_before_relax (fragS *fragP ATTRIBUTE_UNUSED,
	segT segment_type ATTRIBUTE_UNUSED)
	{
	printf (_("call to md_estimate_size_before_relax \n"));
	abort ();
	}


	long
	md_pcrel_from (fixS *fixP)
	{
	long temp_val;
	temp_val=fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address;

	return temp_val;
	}

	long
	md_pcrel_from_section (fixS *fixP, segT sec)
	{
	if (fixP->fx_addsy != (symbolS *) NULL
	&& (! S_IS_DEFINED (fixP->fx_addsy)
	\|\| S_GET_SEGMENT (fixP->fx_addsy) != sec
	\|\| S_IS_EXTERNAL (fixP->fx_addsy)
	\|\| S_IS_WEAK (fixP->fx_addsy)))
	{
	return 0;
	}

	return md_pcrel_from (fixP);
	}

	arelent *
	tc_gen_reloc (asection section ATTRIBUTE_UNUSED, fixS fixp)
	{
	arelent *rel;
	bfd_reloc_code_real_type r_type;

	if (fixp->fx_addsy && fixp->fx_subsy)
	{
	if ((S_GET_SEGMENT (fixp->fx_addsy) != S_GET_SEGMENT (fixp->fx_subsy))
	\|\| S_GET_SEGMENT (fixp->fx_addsy) == undefined_section)
	{
	as_bad_where (fixp->fx_file, fixp->fx_line,
	_("Difference of symbols in different sections is not supported"));
	return NULL;
	}
	}

	rel = xmalloc (sizeof (arelent));
	rel->sym_ptr_ptr = xmalloc (sizeof (asymbol *));
	*rel->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
	rel->address = fixp->fx_frag->fr_address + fixp->fx_where;
	rel->addend = fixp->fx_offset;

	r_type = fixp->fx_r_type;

	#define DEBUG 0
	#if DEBUG
	fprintf (stderr, "%s\n", bfd_get_reloc_code_name (r_type));
	fflush (stderr);
	#endif

	rel->howto = bfd_reloc_type_lookup (stdoutput, r_type);
	if (rel->howto == NULL)
	{
	as_bad_where (fixp->fx_file, fixp->fx_line,
	_("Cannot represent relocation type %s"),
	bfd_get_reloc_code_name (r_type));
	return NULL;
	}

	return rel;
	}

	void
	md_apply_fix (fixS fixP, valueT valP, segT seg ATTRIBUTE_UNUSED)
	{
	if (!strstr (seg->name,".debug"))
	{
	if (*valP < 128)
	*valP /= 2;
	if (*valP>268435455)
	{
	valP = valP * (-1);
	*valP /= 2;
	valP = 256 - (valP);
	}
	}

	gas_cgen_md_apply_fix (fixP, valP, seg);
	return;
	}

	void
	md_convert_frag (bfd *headers ATTRIBUTE_UNUSED,
	segT seg ATTRIBUTE_UNUSED,
	fragS *fragP ATTRIBUTE_UNUSED)
	{
	printf (_("call to md_convert_frag \n"));
	abort ();
	}