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authorRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
committerRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
commit252b5132c753830d5fd56823373aed85f2a0db63 (patch)
tree1af963bfd8d3e55167b81def4207f175eaff3a56 /ld/ldlex.l
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19990502 sourceware importbinu_ss_19990502
Diffstat (limited to 'ld/ldlex.l')
-rw-r--r--ld/ldlex.l662
1 files changed, 662 insertions, 0 deletions
diff --git a/ld/ldlex.l b/ld/ldlex.l
new file mode 100644
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--- /dev/null
+++ b/ld/ldlex.l
@@ -0,0 +1,662 @@
+%{
+
+/* Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98, 1999
+ Free Software Foundation, Inc.
+
+This file is part of GLD, the Gnu Linker.
+
+GLD 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, or (at your option)
+any later version.
+
+GLD 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 GLD; see the file COPYING. If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA. */
+
+/*
+This was written by steve chamberlain
+ sac@cygnus.com
+*/
+
+
+#include <ansidecl.h>
+#include <stdio.h>
+#include <ctype.h>
+
+#ifdef MPW
+/* Prevent enum redefinition problems. */
+#define TRUE_FALSE_ALREADY_DEFINED
+#endif /* MPW */
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "ld.h"
+#include "ldgram.h"
+#include "ldmisc.h"
+#include "ldexp.h"
+#include "ldlang.h"
+#include "ldfile.h"
+#include "ldlex.h"
+#include "ldmain.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.
+ (FIXME Actually, it doesn't appear to get reset for each file?) */
+unsigned int lineno = 1;
+
+/* 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) yy_input(buf, &result, max_size)
+
+#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 include_stack_ptr = 0;
+static int vers_node_nesting = 0;
+
+static YY_BUFFER_STATE yy_create_string_buffer PARAMS ((const char *string,
+ size_t size));
+static void yy_input PARAMS ((char *, int *result, int max_size));
+
+static void comment PARAMS ((void));
+static void lex_warn_invalid PARAMS ((char *where, char *what));
+
+/* STATES
+ EXPRESSION definitely in an expression
+ SCRIPT definitely in a script
+ BOTH either EXPRESSION or SCRIPT
+ DEFSYMEXP in an argument to -defsym
+ MRI in an MRI script
+ 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; }
+
+/* Some versions of flex want this. */
+#ifndef yywrap
+int yywrap () { return 1; }
+#endif
+%}
+
+%a 4000
+%o 5000
+
+CMDFILENAMECHAR [_a-zA-Z0-9\/\.\\_\+\$\:\[\]\\\,\=\&\!\<\>\-\~]
+CMDFILENAMECHAR1 [_a-zA-Z0-9\/\.\\_\+\$\:\[\]\\\,\=\&\!\<\>\~]
+FILENAMECHAR1 [_a-zA-Z\/\.\\\$\_\~]
+SYMBOLCHARN [_a-zA-Z\/\.\\\$\_\~0-9]
+FILENAMECHAR [_a-zA-Z0-9\/\.\-\_\+\=\$\:\[\]\\\,\~]
+WILDCHAR [_a-zA-Z0-9\/\.\-\_\+\=\$\:\[\]\\\,\~\?\*]
+WHITE [ \t\n\r]+
+
+NOCFILENAMECHAR [_a-zA-Z0-9\/\.\-\_\+\$\:\[\]\\\~]
+
+V_TAG [.$_a-zA-Z][._a-zA-Z0-9]*
+V_IDENTIFIER [*?.$_a-zA-Z][*?.$_a-zA-Z0-9]*
+
+%s SCRIPT
+%s EXPRESSION
+%s BOTH
+%s DEFSYMEXP
+%s MRI
+%s VERS_START
+%s VERS_SCRIPT
+%s VERS_NODE
+%%
+
+ if (parser_input != input_selected)
+ {
+ /* The first token of the input determines the initial parser state. */
+ input_type t = parser_input;
+ parser_input = input_selected;
+ switch (t)
+ {
+ case input_script: return INPUT_SCRIPT; break;
+ case input_mri_script: return INPUT_MRI_SCRIPT; break;
+ case input_version_script: return INPUT_VERSION_SCRIPT; break;
+ case input_defsym: return INPUT_DEFSYM; break;
+ default: abort ();
+ }
+ }
+
+<BOTH,SCRIPT,EXPRESSION>"/*" { comment(); }
+
+
+<DEFSYMEXP>"-" { RTOKEN('-');}
+<DEFSYMEXP>"+" { RTOKEN('+');}
+<DEFSYMEXP>{FILENAMECHAR1}{SYMBOLCHARN}* { yylval.name = buystring(yytext); return NAME; }
+<DEFSYMEXP>"=" { RTOKEN('='); }
+
+<MRI,EXPRESSION>"$"([0-9A-Fa-f])+ {
+ yylval.integer = bfd_scan_vma (yytext+1, 0,16);
+ 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);
+ return INT;
+ }
+<SCRIPT,DEFSYMEXP,MRI,BOTH,EXPRESSION>((("$"|"0x")([0-9A-Fa-f])+)|(([0-9])+))(M|K|m|k)? {
+ char *s = yytext;
+
+ if (*s == '$')
+ ++s;
+ yylval.integer = bfd_scan_vma (s, 0, 0);
+ if (yytext[yyleng-1] == 'M'
+ || yytext[yyleng-1] == 'm')
+ yylval.integer *= 1024 * 1024;
+ if (yytext[yyleng-1] == 'K'
+ || yytext[yyleng-1]=='k')
+ yylval.integer *= 1024;
+ return INT;
+ }
+<BOTH,SCRIPT,EXPRESSION,MRI>"]" { RTOKEN(']');}
+<BOTH,SCRIPT,EXPRESSION,MRI>"[" { RTOKEN('[');}
+<BOTH,SCRIPT,EXPRESSION,MRI>"<<=" { RTOKEN(LSHIFTEQ);}
+<BOTH,SCRIPT,EXPRESSION,MRI>">>=" { RTOKEN(RSHIFTEQ);}
+<BOTH,SCRIPT,EXPRESSION,MRI>"||" { RTOKEN(OROR);}
+<BOTH,SCRIPT,EXPRESSION,MRI>"==" { RTOKEN(EQ);}
+<BOTH,SCRIPT,EXPRESSION,MRI>"!=" { RTOKEN(NE);}
+<BOTH,SCRIPT,EXPRESSION,MRI>">=" { RTOKEN(GE);}
+<BOTH,SCRIPT,EXPRESSION,MRI>"<=" { RTOKEN(LE);}
+<BOTH,SCRIPT,EXPRESSION,MRI>"<<" { RTOKEN(LSHIFT);}
+<BOTH,SCRIPT,EXPRESSION,MRI>">>" { RTOKEN(RSHIFT);}
+<BOTH,SCRIPT,EXPRESSION,MRI>"+=" { RTOKEN(PLUSEQ);}
+<BOTH,SCRIPT,EXPRESSION,MRI>"-=" { RTOKEN(MINUSEQ);}
+<BOTH,SCRIPT,EXPRESSION,MRI>"*=" { RTOKEN(MULTEQ);}
+<BOTH,SCRIPT,EXPRESSION,MRI>"/=" { RTOKEN(DIVEQ);}
+<BOTH,SCRIPT,EXPRESSION,MRI>"&=" { RTOKEN(ANDEQ);}
+<BOTH,SCRIPT,EXPRESSION,MRI>"|=" { RTOKEN(OREQ);}
+<BOTH,SCRIPT,EXPRESSION,MRI>"&&" { RTOKEN(ANDAND);}
+<BOTH,SCRIPT,EXPRESSION,MRI>">" { RTOKEN('>');}
+<BOTH,SCRIPT,EXPRESSION,MRI>"," { RTOKEN(',');}
+<BOTH,SCRIPT,EXPRESSION,MRI>"&" { RTOKEN('&');}
+<BOTH,SCRIPT,EXPRESSION,MRI>"|" { RTOKEN('|');}
+<BOTH,SCRIPT,EXPRESSION,MRI>"~" { RTOKEN('~');}
+<BOTH,SCRIPT,EXPRESSION,MRI>"!" { RTOKEN('!');}
+<BOTH,SCRIPT,EXPRESSION,MRI>"?" { RTOKEN('?');}
+<BOTH,SCRIPT,EXPRESSION,MRI>"*" { RTOKEN('*');}
+<BOTH,SCRIPT,EXPRESSION,MRI>"+" { RTOKEN('+');}
+<BOTH,SCRIPT,EXPRESSION,MRI>"-" { RTOKEN('-');}
+<BOTH,SCRIPT,EXPRESSION,MRI>"/" { RTOKEN('/');}
+<BOTH,SCRIPT,EXPRESSION,MRI>"%" { RTOKEN('%');}
+<BOTH,SCRIPT,EXPRESSION,MRI>"<" { RTOKEN('<');}
+<BOTH,SCRIPT,EXPRESSION,MRI>"=" { RTOKEN('=');}
+<BOTH,SCRIPT,EXPRESSION,MRI>"}" { RTOKEN('}') ; }
+<BOTH,SCRIPT,EXPRESSION,MRI>"{" { RTOKEN('{'); }
+<BOTH,SCRIPT,EXPRESSION,MRI>")" { RTOKEN(')');}
+<BOTH,SCRIPT,EXPRESSION,MRI>"(" { RTOKEN('(');}
+<BOTH,SCRIPT,EXPRESSION,MRI>":" { RTOKEN(':'); }
+<BOTH,SCRIPT,EXPRESSION,MRI>";" { RTOKEN(';');}
+<BOTH,SCRIPT>"MEMORY" { RTOKEN(MEMORY);}
+<BOTH,SCRIPT>"ORIGIN" { RTOKEN(ORIGIN);}
+<BOTH,SCRIPT>"VERSION" { RTOKEN(VERSIONK);}
+<EXPRESSION,BOTH,SCRIPT>"BLOCK" { RTOKEN(BLOCK);}
+<EXPRESSION,BOTH,SCRIPT>"BIND" { RTOKEN(BIND);}
+<BOTH,SCRIPT>"LENGTH" { RTOKEN(LENGTH);}
+<EXPRESSION,BOTH,SCRIPT>"ALIGN" { RTOKEN(ALIGN_K);}
+<EXPRESSION,BOTH,SCRIPT>"ADDR" { RTOKEN(ADDR);}
+<EXPRESSION,BOTH,SCRIPT>"LOADADDR" { RTOKEN(LOADADDR);}
+<EXPRESSION,BOTH>"MAX" { RTOKEN(MAX_K); }
+<EXPRESSION,BOTH>"MIN" { RTOKEN(MIN_K); }
+<EXPRESSION,BOTH>"ASSERT" { RTOKEN(ASSERT_K); }
+<BOTH,SCRIPT>"ENTRY" { RTOKEN(ENTRY);}
+<BOTH,SCRIPT,MRI>"EXTERN" { RTOKEN(EXTERN);}
+<EXPRESSION,BOTH,SCRIPT>"NEXT" { RTOKEN(NEXT);}
+<EXPRESSION,BOTH,SCRIPT>"sizeof_headers" { RTOKEN(SIZEOF_HEADERS);}
+<EXPRESSION,BOTH,SCRIPT>"SIZEOF_HEADERS" { RTOKEN(SIZEOF_HEADERS);}
+<BOTH,SCRIPT>"MAP" { RTOKEN(MAP);}
+<EXPRESSION,BOTH,SCRIPT>"SIZEOF" { RTOKEN(SIZEOF);}
+<BOTH,SCRIPT>"TARGET" { RTOKEN(TARGET_K);}
+<BOTH,SCRIPT>"SEARCH_DIR" { RTOKEN(SEARCH_DIR);}
+<BOTH,SCRIPT>"OUTPUT" { RTOKEN(OUTPUT);}
+<BOTH,SCRIPT>"INPUT" { RTOKEN(INPUT);}
+<EXPRESSION,BOTH,SCRIPT>"GROUP" { RTOKEN(GROUP);}
+<EXPRESSION,BOTH,SCRIPT>"DEFINED" { RTOKEN(DEFINED);}
+<BOTH,SCRIPT>"CREATE_OBJECT_SYMBOLS" { RTOKEN(CREATE_OBJECT_SYMBOLS);}
+<BOTH,SCRIPT>"CONSTRUCTORS" { RTOKEN( CONSTRUCTORS);}
+<BOTH,SCRIPT>"FORCE_COMMON_ALLOCATION" { RTOKEN(FORCE_COMMON_ALLOCATION);}
+<BOTH,SCRIPT>"SECTIONS" { RTOKEN(SECTIONS);}
+<BOTH,SCRIPT>"FILL" { RTOKEN(FILL);}
+<BOTH,SCRIPT>"STARTUP" { RTOKEN(STARTUP);}
+<BOTH,SCRIPT>"OUTPUT_FORMAT" { RTOKEN(OUTPUT_FORMAT);}
+<BOTH,SCRIPT>"OUTPUT_ARCH" { RTOKEN( OUTPUT_ARCH);}
+<BOTH,SCRIPT>"HLL" { RTOKEN(HLL);}
+<BOTH,SCRIPT>"SYSLIB" { RTOKEN(SYSLIB);}
+<BOTH,SCRIPT>"FLOAT" { RTOKEN(FLOAT);}
+<BOTH,SCRIPT>"QUAD" { RTOKEN( QUAD);}
+<BOTH,SCRIPT>"SQUAD" { RTOKEN( SQUAD);}
+<BOTH,SCRIPT>"LONG" { RTOKEN( LONG);}
+<BOTH,SCRIPT>"SHORT" { RTOKEN( SHORT);}
+<BOTH,SCRIPT>"BYTE" { RTOKEN( BYTE);}
+<BOTH,SCRIPT>"NOFLOAT" { RTOKEN(NOFLOAT);}
+<EXPRESSION,BOTH,SCRIPT>"NOCROSSREFS" { RTOKEN(NOCROSSREFS);}
+<BOTH,SCRIPT>"OVERLAY" { RTOKEN(OVERLAY); }
+<BOTH,SCRIPT>"SORT" { RTOKEN(SORT); }
+<EXPRESSION,BOTH,SCRIPT>"NOLOAD" { RTOKEN(NOLOAD);}
+<EXPRESSION,BOTH,SCRIPT>"DSECT" { RTOKEN(DSECT);}
+<EXPRESSION,BOTH,SCRIPT>"COPY" { RTOKEN(COPY);}
+<EXPRESSION,BOTH,SCRIPT>"INFO" { RTOKEN(INFO);}
+<EXPRESSION,BOTH,SCRIPT>"OVERLAY" { RTOKEN(OVERLAY);}
+<BOTH,SCRIPT>"o" { RTOKEN(ORIGIN);}
+<BOTH,SCRIPT>"org" { RTOKEN(ORIGIN);}
+<BOTH,SCRIPT>"l" { RTOKEN( LENGTH);}
+<BOTH,SCRIPT>"len" { RTOKEN( LENGTH);}
+<BOTH,SCRIPT>"INCLUDE" { RTOKEN(INCLUDE);}
+<BOTH,SCRIPT>"PHDRS" { RTOKEN (PHDRS); }
+<EXPRESSION,BOTH,SCRIPT>"AT" { RTOKEN(AT);}
+<EXPRESSION,BOTH,SCRIPT>"PROVIDE" { RTOKEN(PROVIDE); }
+<EXPRESSION,BOTH,SCRIPT>"KEEP" { RTOKEN(KEEP); }
+<EXPRESSION,BOTH,SCRIPT>"EXCLUDE_FILE" { RTOKEN(EXCLUDE_FILE); }
+<MRI>"#".*\n? { ++ lineno; }
+<MRI>"\n" { ++ lineno; RTOKEN(NEWLINE); }
+<MRI>"*".* { /* Mri comment line */ }
+<MRI>";".* { /* Mri comment line */ }
+<MRI>"END" { RTOKEN(ENDWORD); }
+<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); }
+<EXPRESSION,BOTH,SCRIPT,MRI>"ABSOLUTE" { RTOKEN(ABSOLUTE); }
+<MRI>"end" { RTOKEN(ENDWORD); }
+<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); }
+<EXPRESSION,BOTH,SCRIPT,MRI>"absolute" { RTOKEN(ABSOLUTE); }
+
+<MRI>{FILENAMECHAR1}{NOCFILENAMECHAR}* {
+/* Filename without commas, needed to parse mri stuff */
+ yylval.name = buystring(yytext);
+ return NAME;
+ }
+
+
+<BOTH,EXPRESSION>{FILENAMECHAR1}{FILENAMECHAR}* {
+ yylval.name = buystring(yytext);
+ return NAME;
+ }
+<BOTH,EXPRESSION>"-l"{FILENAMECHAR}+ {
+ yylval.name = buystring (yytext + 2);
+ return LNAME;
+ }
+<SCRIPT>{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 = buystring(yytext);
+ return NAME;
+ }
+ }
+
+<EXPRESSION,BOTH,SCRIPT,VERS_NODE>"\""[^\"]*"\"" {
+ /* No matter the state, quotes
+ give what's inside */
+ yylval.name = buystring(yytext+1);
+ yylval.name[yyleng-2] = 0;
+ return NAME;
+ }
+<BOTH,SCRIPT,EXPRESSION>"\n" { lineno++;}
+<MRI,BOTH,SCRIPT,EXPRESSION>[ \t\r]+ { }
+
+<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 = buystring (yytext);
+ return VERS_IDENTIFIER; }
+
+<VERS_SCRIPT>{V_TAG} { yylval.name = buystring (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;
+ }
+
+<VERS_START,VERS_NODE,VERS_SCRIPT>[\n] { lineno++; }
+
+<VERS_START,VERS_NODE,VERS_SCRIPT>#.* { /* Eat up comments */ }
+
+<VERS_START,VERS_NODE,VERS_SCRIPT>[ \t\r]+ { /* Eat up whitespace */ }
+
+<<EOF>> {
+ include_stack_ptr--;
+
+ if (include_stack_ptr == 0)
+ {
+ yyterminate();
+ }
+ else
+ {
+ yy_switch_to_buffer(include_stack[include_stack_ptr]);
+
+ }
+ BEGIN(SCRIPT);
+ ldfile_input_filename = file_name_stack[include_stack_ptr - 1];
+ lineno = lineno_stack[include_stack_ptr - 1];
+
+ return END;
+}
+
+<SCRIPT,MRI,VERS_START,VERS_SCRIPT,VERS_NODE>. lex_warn_invalid(" in script", yytext);
+<EXPRESSION,DEFSYMEXP,BOTH>. lex_warn_invalid(" in expression", yytext);
+
+%%
+
+
+/* Switch flex to reading script file NAME, open on FILE,
+ saving the current input info on the include stack. */
+
+void
+lex_push_file (file, name)
+ FILE *file;
+ const char *name;
+{
+ 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] = 1;
+ include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
+
+ include_stack_ptr++;
+ yyin = file;
+ yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
+ BEGIN (SCRIPT);
+}
+
+/* Return a newly created flex input buffer containing STRING,
+ which is SIZE bytes long. */
+
+static YY_BUFFER_STATE
+yy_create_string_buffer (string, size)
+ CONST char *string;
+ size_t size;
+{
+ YY_BUFFER_STATE b;
+
+ /* Calls to m-alloc get turned by sed into xm-alloc. */
+ b = (YY_BUFFER_STATE) malloc (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 = (char *) malloc ((unsigned) (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];
+
+ /* 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 (string)
+ CONST char *string;
+{
+ 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] = "redirect";
+ lineno_stack[include_stack_ptr] = 0;
+ include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
+ include_stack_ptr++;
+ tmp = yy_create_string_buffer (string, strlen (string));
+ yy_switch_to_buffer (tmp);
+ BEGIN (SCRIPT);
+}
+
+/* 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 ()
+{
+ *(state_stack_p)++ = yy_start;
+ BEGIN (SCRIPT);
+}
+
+void
+ldlex_mri_script ()
+{
+ *(state_stack_p)++ = yy_start;
+ BEGIN (MRI);
+}
+
+void
+ldlex_version_script ()
+{
+ *(state_stack_p)++ = yy_start;
+ BEGIN (VERS_START);
+}
+
+void
+ldlex_version_file ()
+{
+ *(state_stack_p)++ = yy_start;
+ BEGIN (VERS_SCRIPT);
+}
+
+void
+ldlex_defsym ()
+{
+ *(state_stack_p)++ = yy_start;
+ BEGIN (DEFSYMEXP);
+}
+
+void
+ldlex_expression ()
+{
+ *(state_stack_p)++ = yy_start;
+ BEGIN (EXPRESSION);
+}
+
+void
+ldlex_both ()
+{
+ *(state_stack_p)++ = yy_start;
+ BEGIN (BOTH);
+}
+
+void
+ldlex_popstate ()
+{
+ yy_start = *(--state_stack_p);
+}
+
+
+/* Place up to MAX_SIZE characters in BUF and return in *RESULT
+ either the number of characters read, or 0 to indicate EOF. */
+
+static void
+yy_input (buf, result, max_size)
+ char *buf;
+ int *result;
+ int max_size;
+{
+ *result = 0;
+ if (yy_current_buffer->yy_input_file)
+ {
+ if (yyin)
+ {
+ *result = read (fileno (yyin), (char *) buf, max_size);
+ if (*result < 0)
+ einfo ("%F%P: read in flex scanner failed\n");
+ }
+ }
+}
+
+/* Eat the rest of a C-style comment. */
+
+static void
+comment ()
+{
+ int c;
+
+ while (1)
+ {
+ c = input();
+ while (c != '*' && c != EOF)
+ {
+ 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 == EOF)
+ {
+ 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 (where, what)
+ char *where, *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", ldfile_input_filename);
+ }
+
+ if (! isprint ((unsigned char) *what))
+ {
+ sprintf (buf, "\\%03o", (unsigned int) *what);
+ what = buf;
+ }
+
+ einfo ("%P:%S: ignoring invalid character `%s'%s\n", what, where);
+}