ld script lower-case absolute and sizeof_headers

[thirdparty/binutils-gdb.git] / ld / ldlex.l

%option nounput noyywrap

%{

/* Copyright (C) 1991-2021 Free Software Foundation, Inc.
   Written by Steve Chamberlain of Cygnus Support.

   This file is part of the GNU Binutils.

   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 3 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., 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */

#include "bfd.h"
#include "safe-ctype.h"
#include "bfdlink.h"
#include "ctf-api.h"
#include "ld.h"
#include "ldmisc.h"
#include "ldexp.h"
#include "ldlang.h"
#include <ldgram.h>
#include "ldfile.h"
#include "ldlex.h"
#include "ldmain.h"
#include "libiberty.h"

/* The type of top-level parser input.
   yylex and yyparse (indirectly) both check this.  */
input_type parser_input;

/* Line number in the current input file.  */
unsigned int lineno;

/* The string we are currently lexing, or NULL if we are reading a
   file.  */
const char *lex_string = NULL;

/* Support for flex reading from more than one input file (stream).
   `include_stack' is flex's input state for each open file;
   `file_name_stack' is the file names.  `lineno_stack' is the current
   line numbers.

   If `include_stack_ptr' is 0, we haven't started reading anything yet.
   Otherwise, stack elements 0 through `include_stack_ptr - 1' are valid.  */

#undef YY_INPUT
#define YY_INPUT(buf,result,max_size) result = yy_input (buf, max_size)

#ifndef YY_NO_UNPUT
#define YY_NO_UNPUT
#endif

#define MAX_INCLUDE_DEPTH 10
static YY_BUFFER_STATE include_stack[MAX_INCLUDE_DEPTH];
static const char *file_name_stack[MAX_INCLUDE_DEPTH];
static unsigned int lineno_stack[MAX_INCLUDE_DEPTH];
static unsigned int sysrooted_stack[MAX_INCLUDE_DEPTH];
static unsigned int include_stack_ptr = 0;
static int vers_node_nesting = 0;

static int yy_input (char *, int);
static void comment (void);
static void lex_warn_invalid (char *where, char *what);

/* STATES
	EXPRESSION	in an expression
	SCRIPT		in a script
	INPUTLIST	in a script, a filename-list
	MRI		in an MRI script
	WILD		inside the braces of an output section or overlay,
			for input section wildcards
	VERS_START	starting a Sun style mapfile
	VERS_SCRIPT	a Sun style mapfile
	VERS_NODE	a node within a Sun style mapfile
*/
#define RTOKEN(x)  {  yylval.token = x; return x; }

%}

%a 4000
%o 5000

WILDCHAR	[_a-zA-Z0-9\/\.\\\$\~\-\+\:\[\]\,\=\?\*\^\!]
FILENAMECHAR	[_a-zA-Z0-9\/\.\\\$\~\-\+\:\[\]\,\=]
NOCFILENAMECHAR	[_a-zA-Z0-9\/\.\\\$\~\-\+\:\[\]]
SYMBOLNAMECHAR  [_a-zA-Z0-9\/\.\\\$\~]
FILENAMECHAR1	[_a-zA-Z\/\.\\\$\~]
SYMBOLNAMECHAR1	[_a-zA-Z\.\\\$]
WHITE		[ \t\n\r]+

V_TAG [.$_a-zA-Z][._a-zA-Z0-9]*
V_IDENTIFIER [*?.$_a-zA-Z\[\]\-\!\^\\]([*?.$_a-zA-Z0-9\[\]\-\!\^\\]|::)*

%s SCRIPT
%s INPUTLIST
%s EXPRESSION
%s MRI
%s WILD
%s VERS_START
%s VERS_SCRIPT
%s VERS_NODE
%%

  if (parser_input != input_selected)
    {
      /* The first token of the input determines the initial parser state.  */
      input_type t = parser_input;
      parser_input = input_selected;
      switch (t)
	{
	case input_script: return INPUT_SCRIPT; break;
	case input_mri_script: return INPUT_MRI_SCRIPT; break;
	case input_version_script: return INPUT_VERSION_SCRIPT; break;
	case input_dynamic_list: return INPUT_DYNAMIC_LIST; break;
	case input_defsym: return INPUT_DEFSYM; break;
	default: abort ();
	}
    }

<SCRIPT,EXPRESSION,VERS_START,VERS_NODE,VERS_SCRIPT,INPUTLIST>"/*" {
				comment (); }

<MRI,EXPRESSION>"$"([0-9A-Fa-f])+ {
				yylval.integer = bfd_scan_vma (yytext + 1, 0, 16);
				yylval.bigint.str = NULL;
				return INT;
			}

<MRI,EXPRESSION>([0-9A-Fa-f])+(H|h|X|x|B|b|O|o|D|d) {
				   int ibase ;
				   switch (yytext[yyleng - 1]) {
				    case 'X':
				    case 'x':
				    case 'H':
				    case 'h':
				     ibase = 16;
				     break;
				    case 'O':
				    case 'o':
				     ibase = 8;
				     break;
				    case 'B':
				    case 'b':
				     ibase = 2;
				     break;
				    default:
				     ibase = 10;
				   }
				   yylval.integer = bfd_scan_vma (yytext, 0,
								  ibase);
				   yylval.bigint.str = NULL;
				   return INT;
				 }
<SCRIPT,MRI,EXPRESSION>((("$"|0[xX])([0-9A-Fa-f])+)|(([0-9])+))(M|K|m|k)? {
				  char *s = yytext;
				  int ibase = 0;

				  if (*s == '$')
				    {
				      ++s;
				      ibase = 16;
				    }
				  yylval.integer = bfd_scan_vma (s, 0, ibase);
				  yylval.bigint.str = NULL;
				  if (yytext[yyleng - 1] == 'M'
				      || yytext[yyleng - 1] == 'm')
				    {
				      yylval.integer *= 1024 * 1024;
				    }
				  else if (yytext[yyleng - 1] == 'K'
				      || yytext[yyleng - 1]=='k')
				    {
				      yylval.integer *= 1024;
				    }
				  else if (yytext[0] == '0'
					   && (yytext[1] == 'x'
					       || yytext[1] == 'X'))
				    {
				      yylval.bigint.str = xstrdup (yytext + 2);
				    }
				  return INT;
				}
<SCRIPT,EXPRESSION,MRI,WILD>"]"		{ RTOKEN(']');}
<SCRIPT,EXPRESSION,MRI,WILD>"["		{ RTOKEN('[');}
<SCRIPT,EXPRESSION,MRI,WILD>"<<="	{ RTOKEN(LSHIFTEQ);}
<SCRIPT,EXPRESSION,MRI,WILD>">>="	{ RTOKEN(RSHIFTEQ);}
<SCRIPT,EXPRESSION,MRI>"||"		{ RTOKEN(OROR);}
<SCRIPT,EXPRESSION,MRI>"=="		{ RTOKEN(EQ);}
<SCRIPT,EXPRESSION,MRI>"!="		{ RTOKEN(NE);}
<SCRIPT,EXPRESSION,MRI>">="		{ RTOKEN(GE);}
<SCRIPT,EXPRESSION,MRI>"<="		{ RTOKEN(LE);}
<SCRIPT,EXPRESSION,MRI>"<<"		{ RTOKEN(LSHIFT);}
<SCRIPT,EXPRESSION,MRI>">>"		{ RTOKEN(RSHIFT);}
<SCRIPT,EXPRESSION,MRI,WILD>"+="	{ RTOKEN(PLUSEQ);}
<SCRIPT,EXPRESSION,MRI,WILD>"-="	{ RTOKEN(MINUSEQ);}
<SCRIPT,EXPRESSION,MRI,WILD>"*="	{ RTOKEN(MULTEQ);}
<SCRIPT,EXPRESSION,MRI,WILD>"/="	{ RTOKEN(DIVEQ);}
<SCRIPT,EXPRESSION,MRI,WILD>"&="	{ RTOKEN(ANDEQ);}
<SCRIPT,EXPRESSION,MRI,WILD>"|="	{ RTOKEN(OREQ);}
<SCRIPT,EXPRESSION,MRI>"&&"		{ RTOKEN(ANDAND);}
<SCRIPT,EXPRESSION,MRI>">"		{ RTOKEN('>');}
<SCRIPT,EXPRESSION,MRI,INPUTLIST>","	{ RTOKEN(',');}
<SCRIPT,EXPRESSION,MRI,WILD>"&"		{ RTOKEN('&');}
<SCRIPT,EXPRESSION,MRI>"|"		{ RTOKEN('|');}
<SCRIPT,EXPRESSION,MRI>"~"		{ RTOKEN('~');}
<SCRIPT,EXPRESSION,MRI>"!"		{ RTOKEN('!');}
<SCRIPT,EXPRESSION,MRI>"?"		{ RTOKEN('?');}
<SCRIPT,EXPRESSION,MRI>"*"		{ RTOKEN('*');}
<SCRIPT,EXPRESSION,MRI>"+"		{ RTOKEN('+');}
<SCRIPT,EXPRESSION,MRI>"-"		{ RTOKEN('-');}
<SCRIPT,EXPRESSION,MRI>"/"		{ RTOKEN('/');}
<SCRIPT,EXPRESSION,MRI>"%"		{ RTOKEN('%');}
<SCRIPT,EXPRESSION,MRI>"<"		{ RTOKEN('<');}
<SCRIPT,EXPRESSION,MRI,WILD>"="		{ RTOKEN('=');}
<SCRIPT,EXPRESSION,MRI,WILD>"}"		{ RTOKEN('}'); }
<SCRIPT,EXPRESSION,MRI,WILD>"{"		{ RTOKEN('{'); }
<SCRIPT,EXPRESSION,MRI,WILD,INPUTLIST>")" { RTOKEN(')');}
<SCRIPT,EXPRESSION,MRI,WILD,INPUTLIST>"(" { RTOKEN('(');}
<SCRIPT,EXPRESSION,MRI>":"		{ RTOKEN(':'); }
<SCRIPT,EXPRESSION,MRI,WILD>";"		{ RTOKEN(';');}
<SCRIPT>"MEMORY"			{ RTOKEN(MEMORY);}
<SCRIPT>"REGION_ALIAS"			{ RTOKEN(REGION_ALIAS);}
<SCRIPT>"LD_FEATURE"			{ RTOKEN(LD_FEATURE);}
<SCRIPT,EXPRESSION>"ORIGIN"		{ RTOKEN(ORIGIN);}
<SCRIPT>"VERSION"			{ RTOKEN(VERSIONK);}
<SCRIPT,EXPRESSION>"BLOCK"		{ RTOKEN(BLOCK);}
<SCRIPT,EXPRESSION>"BIND"		{ RTOKEN(BIND);}
<SCRIPT,EXPRESSION>"LENGTH"		{ RTOKEN(LENGTH);}
<SCRIPT,EXPRESSION>"ALIGN"		{ RTOKEN(ALIGN_K);}
<SCRIPT,EXPRESSION>"DATA_SEGMENT_ALIGN"	{ RTOKEN(DATA_SEGMENT_ALIGN);}
<SCRIPT,EXPRESSION>"DATA_SEGMENT_RELRO_END" { RTOKEN(DATA_SEGMENT_RELRO_END);}
<SCRIPT,EXPRESSION>"DATA_SEGMENT_END"	{ RTOKEN(DATA_SEGMENT_END);}
<SCRIPT,EXPRESSION>"ADDR"		{ RTOKEN(ADDR);}
<SCRIPT,EXPRESSION>"LOADADDR"		{ RTOKEN(LOADADDR);}
<SCRIPT,EXPRESSION>"ALIGNOF"		{ RTOKEN(ALIGNOF); }
<SCRIPT,EXPRESSION>"ABSOLUTE"		{ RTOKEN(ABSOLUTE); }
<EXPRESSION>"MAX"			{ RTOKEN(MAX_K); }
<EXPRESSION>"MIN"			{ RTOKEN(MIN_K); }
<EXPRESSION>"LOG2CEIL"			{ RTOKEN(LOG2CEIL); }
<SCRIPT,EXPRESSION,WILD>"ASSERT"	{ RTOKEN(ASSERT_K); }
<SCRIPT,WILD>"ENTRY"			{ RTOKEN(ENTRY);}
<SCRIPT,MRI>"EXTERN"			{ RTOKEN(EXTERN);}
<SCRIPT,EXPRESSION>"NEXT"		{ RTOKEN(NEXT);}
<SCRIPT,EXPRESSION>"SIZEOF_HEADERS"	{ RTOKEN(SIZEOF_HEADERS);}
<SCRIPT,EXPRESSION>"SEGMENT_START"	{ RTOKEN(SEGMENT_START);}
<SCRIPT>"MAP"				{ RTOKEN(MAP);}
<SCRIPT,EXPRESSION>"SIZEOF"		{ RTOKEN(SIZEOF);}
<SCRIPT>"TARGET"			{ RTOKEN(TARGET_K);}
<SCRIPT>"SEARCH_DIR"			{ RTOKEN(SEARCH_DIR);}
<SCRIPT>"OUTPUT"			{ RTOKEN(OUTPUT);}
<SCRIPT>"INPUT"				{ RTOKEN(INPUT);}
<SCRIPT,EXPRESSION,WILD>"GROUP"		{ RTOKEN(GROUP);}
<SCRIPT,EXPRESSION,INPUTLIST>"AS_NEEDED" { RTOKEN(AS_NEEDED);}
<SCRIPT,EXPRESSION>"DEFINED"		{ RTOKEN(DEFINED);}
<SCRIPT,WILD>"CREATE_OBJECT_SYMBOLS"	{ RTOKEN(CREATE_OBJECT_SYMBOLS);}
<SCRIPT,WILD>"CONSTRUCTORS"		{ RTOKEN(CONSTRUCTORS);}
<SCRIPT>"FORCE_COMMON_ALLOCATION"	{ RTOKEN(FORCE_COMMON_ALLOCATION);}
<SCRIPT>"FORCE_GROUP_ALLOCATION"	{ RTOKEN(FORCE_GROUP_ALLOCATION);}
<SCRIPT>"INHIBIT_COMMON_ALLOCATION"	{ RTOKEN(INHIBIT_COMMON_ALLOCATION);}
<SCRIPT>"SECTIONS"			{ RTOKEN(SECTIONS);}
<SCRIPT>"INSERT"			{ RTOKEN(INSERT_K);}
<SCRIPT>"AFTER"				{ RTOKEN(AFTER);}
<SCRIPT>"BEFORE"			{ RTOKEN(BEFORE);}
<SCRIPT,WILD>"FILL"			{ RTOKEN(FILL);}
<SCRIPT>"STARTUP"			{ RTOKEN(STARTUP);}
<SCRIPT>"OUTPUT_FORMAT"			{ RTOKEN(OUTPUT_FORMAT);}
<SCRIPT>"OUTPUT_ARCH"			{ RTOKEN(OUTPUT_ARCH);}
<SCRIPT>"HLL"				{ RTOKEN(HLL);}
<SCRIPT>"SYSLIB"			{ RTOKEN(SYSLIB);}
<SCRIPT>"FLOAT"				{ RTOKEN(FLOAT);}
<SCRIPT,WILD>"QUAD"			{ RTOKEN( QUAD);}
<SCRIPT,WILD>"SQUAD"			{ RTOKEN( SQUAD);}
<SCRIPT,WILD>"LONG"			{ RTOKEN( LONG);}
<SCRIPT,WILD>"SHORT"			{ RTOKEN( SHORT);}
<SCRIPT,WILD>"BYTE"			{ RTOKEN( BYTE);}
<SCRIPT>"NOFLOAT"			{ RTOKEN(NOFLOAT);}
<SCRIPT,EXPRESSION>"NOCROSSREFS"	{ RTOKEN(NOCROSSREFS);}
<SCRIPT,EXPRESSION>"NOCROSSREFS_TO"	{ RTOKEN(NOCROSSREFS_TO);}
<SCRIPT>"OVERLAY"			{ RTOKEN(OVERLAY); }
<SCRIPT,WILD>"SORT_BY_NAME"		{ RTOKEN(SORT_BY_NAME); }
<SCRIPT,WILD>"SORT_BY_ALIGNMENT"	{ RTOKEN(SORT_BY_ALIGNMENT); }
<SCRIPT,WILD>"SORT"			{ RTOKEN(SORT_BY_NAME); }
<SCRIPT,WILD>"SORT_BY_INIT_PRIORITY"	{ RTOKEN(SORT_BY_INIT_PRIORITY); }
<SCRIPT,WILD>"SORT_NONE"		{ RTOKEN(SORT_NONE); }
<SCRIPT,EXPRESSION>"NOLOAD"		{ RTOKEN(NOLOAD);}
<SCRIPT,EXPRESSION>"READONLY"		{ RTOKEN(READONLY);}
<SCRIPT,EXPRESSION>"DSECT"		{ RTOKEN(DSECT);}
<SCRIPT,EXPRESSION>"COPY"		{ RTOKEN(COPY);}
<SCRIPT,EXPRESSION>"INFO"		{ RTOKEN(INFO);}
<SCRIPT,EXPRESSION>"OVERLAY"		{ RTOKEN(OVERLAY);}
<EXPRESSION>"ONLY_IF_RO"		{ RTOKEN(ONLY_IF_RO); }
<EXPRESSION>"ONLY_IF_RW"		{ RTOKEN(ONLY_IF_RW); }
<EXPRESSION>"SPECIAL"			{ RTOKEN(SPECIAL); }
<SCRIPT>"o"				{ RTOKEN(ORIGIN);}
<SCRIPT>"org"				{ RTOKEN(ORIGIN);}
<SCRIPT>"l"				{ RTOKEN( LENGTH);}
<SCRIPT>"len"				{ RTOKEN( LENGTH);}
<SCRIPT,EXPRESSION,WILD>"INPUT_SECTION_FLAGS" { RTOKEN(INPUT_SECTION_FLAGS); }
<SCRIPT,EXPRESSION,WILD>"INCLUDE"	{ RTOKEN(INCLUDE);}
<SCRIPT>"PHDRS"				{ RTOKEN (PHDRS); }
<SCRIPT,EXPRESSION,WILD>"AT"		{ RTOKEN(AT);}
<SCRIPT,EXPRESSION>"ALIGN_WITH_INPUT"	{ RTOKEN(ALIGN_WITH_INPUT);}
<SCRIPT,EXPRESSION>"SUBALIGN"		{ RTOKEN(SUBALIGN);}
<SCRIPT,EXPRESSION,WILD>"HIDDEN"	{ RTOKEN(HIDDEN); }
<SCRIPT,EXPRESSION,WILD>"PROVIDE"	{ RTOKEN(PROVIDE); }
<SCRIPT,EXPRESSION,WILD>"PROVIDE_HIDDEN" { RTOKEN(PROVIDE_HIDDEN); }
<SCRIPT,EXPRESSION,WILD>"KEEP"		{ RTOKEN(KEEP); }
<SCRIPT,EXPRESSION,WILD>"EXCLUDE_FILE"	{ RTOKEN(EXCLUDE_FILE); }
<SCRIPT,EXPRESSION>"CONSTANT"		{ RTOKEN(CONSTANT);}

<MRI>"#".*\n?			{ ++ lineno; }
<MRI>"\n"			{ ++ lineno;  RTOKEN(NEWLINE); }
<MRI>"*".*			{ /* Mri comment line */ }
<MRI>";".*			{ /* Mri comment line */ }
<MRI>"END"			{ RTOKEN(ENDWORD); }
<MRI>"ABSOLUTE"			{ RTOKEN(ABSOLUTE); }
<MRI>"ALIGNMOD"			{ RTOKEN(ALIGNMOD);}
<MRI>"ALIGN"			{ RTOKEN(ALIGN_K);}
<MRI>"CHIP"			{ RTOKEN(CHIP); }
<MRI>"BASE"			{ RTOKEN(BASE); }
<MRI>"ALIAS"			{ RTOKEN(ALIAS); }
<MRI>"TRUNCATE"			{ RTOKEN(TRUNCATE); }
<MRI>"LOAD"			{ RTOKEN(LOAD); }
<MRI>"PUBLIC"			{ RTOKEN(PUBLIC); }
<MRI>"ORDER"			{ RTOKEN(ORDER); }
<MRI>"NAME"			{ RTOKEN(NAMEWORD); }
<MRI>"FORMAT"			{ RTOKEN(FORMAT); }
<MRI>"CASE"			{ RTOKEN(CASE); }
<MRI>"START"			{ RTOKEN(START); }
<MRI>"LIST".*			{ RTOKEN(LIST); /* LIST and ignore to end of line */ }
<MRI>"SECT"			{ RTOKEN(SECT); }
<MRI>"end"			{ RTOKEN(ENDWORD); }
<MRI>"absolute"			{ RTOKEN(ABSOLUTE); }
<MRI>"alignmod"			{ RTOKEN(ALIGNMOD);}
<MRI>"align"			{ RTOKEN(ALIGN_K);}
<MRI>"chip"			{ RTOKEN(CHIP); }
<MRI>"base"			{ RTOKEN(BASE); }
<MRI>"alias"			{ RTOKEN(ALIAS); }
<MRI>"truncate"			{ RTOKEN(TRUNCATE); }
<MRI>"load"			{ RTOKEN(LOAD); }
<MRI>"public"			{ RTOKEN(PUBLIC); }
<MRI>"order"			{ RTOKEN(ORDER); }
<MRI>"name"			{ RTOKEN(NAMEWORD); }
<MRI>"format"			{ RTOKEN(FORMAT); }
<MRI>"case"			{ RTOKEN(CASE); }
<MRI>"extern"			{ RTOKEN(EXTERN); }
<MRI>"start"			{ RTOKEN(START); }
<MRI>"list".*			{ RTOKEN(LIST); /* LIST and ignore to end of line */ }
<MRI>"sect"			{ RTOKEN(SECT); }

<MRI>{FILENAMECHAR1}{NOCFILENAMECHAR}*	{
/* Filename without commas, needed to parse mri stuff */
				  yylval.name = xstrdup (yytext);
				  return NAME;
				}


<SCRIPT,INPUTLIST>{FILENAMECHAR1}{FILENAMECHAR}*	{
				  yylval.name = xstrdup (yytext);
				  return NAME;
				}
<INPUTLIST>"="{FILENAMECHAR1}{FILENAMECHAR}*	{
/* Filename to be prefixed by --sysroot or when non-sysrooted, nothing.  */
				  yylval.name = xstrdup (yytext);
				  return NAME;
				}
<INPUTLIST>"-l"{FILENAMECHAR}+ {
				  yylval.name = xstrdup (yytext + 2);
				  return LNAME;
				}
<EXPRESSION>{SYMBOLNAMECHAR1}{SYMBOLNAMECHAR}* {
				  yylval.name = xstrdup (yytext);
				  return NAME;
				}
<EXPRESSION>"/DISCARD/"		{
				  yylval.name = xstrdup (yytext);
				  return NAME;
				}
<EXPRESSION>"-l"{NOCFILENAMECHAR}+ {
				  yylval.name = xstrdup (yytext + 2);
				  return LNAME;
				}
<WILD>{WILDCHAR}* {
		/* Annoyingly, this pattern can match comments, and we have
		   longest match issues to consider.  So if the first two
		   characters are a comment opening, put the input back and
		   try again.  */
		if (yytext[0] == '/' && yytext[1] == '*')
		  {
		    yyless (2);
		    comment ();
		  }
		else
		  {
		    yylval.name = xstrdup (yytext);
		    return NAME;
		  }
	}

<SCRIPT,EXPRESSION,WILD,VERS_NODE,INPUTLIST>"\""[^\"]*"\"" {
					/* No matter the state, quotes
					   give what's inside.  */
					bfd_size_type len;
					yylval.name = xstrdup (yytext + 1);
					/* PR ld/20906.  A corrupt input file
					   can contain bogus strings.  */
					len = strlen (yylval.name);
					if (len > (bfd_size_type) yyleng - 2)
					  len = yyleng - 2;
					yylval.name[len] = 0;
					return NAME;
				}

<SCRIPT,EXPRESSION,WILD,VERS_START,VERS_NODE,VERS_SCRIPT,INPUTLIST>"\n" {
				lineno++; }
<MRI,SCRIPT,EXPRESSION,WILD,VERS_START,VERS_NODE,VERS_SCRIPT,INPUTLIST>[ \t\r]+ {
				/* Eat up whitespace */ }
<SCRIPT,EXPRESSION,WILD,VERS_START,VERS_NODE,VERS_SCRIPT>#.* {
				/* Eat up comments */ }

<VERS_NODE,VERS_SCRIPT>[:,;]	{ return *yytext; }

<VERS_NODE>global		{ RTOKEN(GLOBAL); }

<VERS_NODE>local		{ RTOKEN(LOCAL); }

<VERS_NODE>extern		{ RTOKEN(EXTERN); }

<VERS_NODE>{V_IDENTIFIER}	{ yylval.name = xstrdup (yytext);
				  return VERS_IDENTIFIER; }

<VERS_SCRIPT>{V_TAG}		{ yylval.name = xstrdup (yytext);
				  return VERS_TAG; }

<VERS_START>"{"			{ BEGIN(VERS_SCRIPT); return *yytext; }

<VERS_SCRIPT>"{"		{ BEGIN(VERS_NODE);
				  vers_node_nesting = 0;
				  return *yytext;
				}
<VERS_SCRIPT>"}"		{ return *yytext; }
<VERS_NODE>"{"			{ vers_node_nesting++; return *yytext; }
<VERS_NODE>"}"			{ if (--vers_node_nesting < 0)
				    BEGIN(VERS_SCRIPT);
				  return *yytext;
				}

<<EOF>> {
  include_stack_ptr--;
  if (include_stack_ptr == 0)
    {
      lineno = 0;
      yyterminate ();
    }
  else
    yy_switch_to_buffer (include_stack[include_stack_ptr]);

  lineno = lineno_stack[include_stack_ptr];
  input_flags.sysrooted = sysrooted_stack[include_stack_ptr];

  return END;
}

<SCRIPT,MRI,VERS_START,VERS_SCRIPT,VERS_NODE>.	lex_warn_invalid (" in script", yytext);
<EXPRESSION>.	lex_warn_invalid (" in expression", yytext);

%%
\f

/* Switch flex to reading script file NAME, open on FILE,
   saving the current input info on the include stack.  */

void
lex_push_file (FILE *file, const char *name, unsigned int sysrooted)
{
  if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
    {
      einfo (_("%F:includes nested too deeply\n"));
    }
  file_name_stack[include_stack_ptr] = name;
  lineno_stack[include_stack_ptr] = lineno;
  sysrooted_stack[include_stack_ptr] = input_flags.sysrooted;
  include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;

  include_stack_ptr++;
  lineno = 1;
  input_flags.sysrooted = sysrooted;
  yyin = file;
  yy_switch_to_buffer (yy_create_buffer (yyin, YY_BUF_SIZE));
}

/* Return a newly created flex input buffer containing STRING,
   which is SIZE bytes long.  */

static YY_BUFFER_STATE
yy_create_string_buffer (const char *string, size_t size)
{
  YY_BUFFER_STATE b;

  b = xmalloc (sizeof (struct yy_buffer_state));
  b->yy_input_file = 0;
  b->yy_buf_size = size;

  /* yy_ch_buf has to be 2 characters longer than the size given because
     we need to put in 2 end-of-buffer characters.  */
  b->yy_ch_buf = xmalloc ((size_t) b->yy_buf_size + 3);

  b->yy_ch_buf[0] = '\n';
  strcpy (b->yy_ch_buf+1, string);
  b->yy_ch_buf[size+1] = YY_END_OF_BUFFER_CHAR;
  b->yy_ch_buf[size+2] = YY_END_OF_BUFFER_CHAR;
  b->yy_n_chars = size+1;
  b->yy_buf_pos = &b->yy_ch_buf[1];

  b->yy_is_our_buffer = 1;
  b->yy_is_interactive = 0;
  b->yy_at_bol = 1;
  b->yy_fill_buffer = 0;

  /* flex 2.4.7 changed the interface.  FIXME: We should not be using
     a flex internal interface in the first place!  */
#ifdef YY_BUFFER_NEW
  b->yy_buffer_status = YY_BUFFER_NEW;
#else
  b->yy_eof_status = EOF_NOT_SEEN;
#endif

  return b;
}

/* Switch flex to reading from STRING, saving the current input info
   on the include stack.  */

void
lex_redirect (const char *string, const char *fake_filename, unsigned int count)
{
  YY_BUFFER_STATE tmp;

  yy_init = 0;
  if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
    {
      einfo (_("%F: macros nested too deeply\n"));
    }
  file_name_stack[include_stack_ptr] = fake_filename;
  lineno_stack[include_stack_ptr] = lineno;
  include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
  include_stack_ptr++;
  lineno = count;
  tmp = yy_create_string_buffer (string, strlen (string));
  yy_switch_to_buffer (tmp);
}
\f
/* Functions to switch to a different flex start condition,
   saving the current start condition on `state_stack'.  */

static int state_stack[MAX_INCLUDE_DEPTH * 2];
static int *state_stack_p = state_stack;

void
ldlex_script (void)
{
  *(state_stack_p)++ = yy_start;
  BEGIN (SCRIPT);
}

void
ldlex_inputlist (void)
{
  *(state_stack_p)++ = yy_start;
  BEGIN (INPUTLIST);
}

void
ldlex_mri_script (void)
{
  *(state_stack_p)++ = yy_start;
  BEGIN (MRI);
}

void
ldlex_version_script (void)
{
  *(state_stack_p)++ = yy_start;
  BEGIN (VERS_START);
}

void
ldlex_version_file (void)
{
  *(state_stack_p)++ = yy_start;
  BEGIN (VERS_SCRIPT);
}

void
ldlex_expression (void)
{
  *(state_stack_p)++ = yy_start;
  BEGIN (EXPRESSION);
}

void
ldlex_wild (void)
{
  *(state_stack_p)++ = yy_start;
  BEGIN (WILD);
}

void
ldlex_popstate (void)
{
  yy_start = *(--state_stack_p);
}

/* In cases where the parser needs to look ahead and the context
   changes from expression to script or vice-versa, throw away a
   NAME.  What constitutes a NAME depends on context.  */

void
ldlex_backup (void)
{
  yyless (0);
}

/* Return the current file name, or the previous file if no file is
   current.  */

const char*
ldlex_filename (void)
{
  return file_name_stack[include_stack_ptr - (include_stack_ptr != 0)];
}
\f

/* Place up to MAX_SIZE characters in BUF and return
   either the number of characters read, or 0 to indicate EOF.  */

static int
yy_input (char *buf, int max_size)
{
  int result = 0;
  if (YY_CURRENT_BUFFER->yy_input_file)
    {
      if (yyin)
	{
	  result = fread (buf, 1, max_size, yyin);
	  if (result < max_size && ferror (yyin))
	    einfo (_("%F%P: read in flex scanner failed\n"));
	}
    }
  return result;
}

/* Eat the rest of a C-style comment.  */

static void
comment (void)
{
  int c;

  while (1)
    {
      c = input();
      while (c != '*' && c != 0)
	{
	  if (c == '\n')
	    lineno++;
	  c = input();
	}

      if (c == '*')
	{
	  c = input();
	  while (c == '*')
	    c = input();
	  if (c == '/')
	    break;			/* found the end */
	}

      if (c == '\n')
	lineno++;

      if (c == 0)
	{
	  einfo (_("%F%P: EOF in comment\n"));
	  break;
	}
    }
}

/* Warn the user about a garbage character WHAT in the input
   in context WHERE.  */

static void
lex_warn_invalid (char *where, char *what)
{
  char buf[5];

  /* If we have found an input file whose format we do not recognize,
     and we are therefore treating it as a linker script, and we find
     an invalid character, then most likely this is a real object file
     of some different format.  Treat it as such.  */
  if (ldfile_assumed_script)
    {
      bfd_set_error (bfd_error_file_not_recognized);
      einfo (_("%F%s: file not recognized: %E\n"), ldlex_filename ());
    }

  if (! ISPRINT (*what))
    {
      sprintf (buf, "\\%03o", *(unsigned char *) what);
      what = buf;
    }

  einfo (_("%P:%pS: ignoring invalid character `%s'%s\n"), NULL, what, where);
}