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Diffstat (limited to 'contrib/binutils/ld/ldgram.y')
| -rw-r--r-- | contrib/binutils/ld/ldgram.y | 1339 |
1 files changed, 1339 insertions, 0 deletions
diff --git a/contrib/binutils/ld/ldgram.y b/contrib/binutils/ld/ldgram.y new file mode 100644 index 000000000000..c6f268b1d7cb --- /dev/null +++ b/contrib/binutils/ld/ldgram.y @@ -0,0 +1,1339 @@ +/* A YACC grammar to parse a superset of the AT&T linker scripting language. + Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, + 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. + Written by Steve Chamberlain of Cygnus Support (steve@cygnus.com). + + This file is part of GNU ld. + + 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 2 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. */ + +%{ +/* + + */ + +#define DONTDECLARE_MALLOC + +#include "sysdep.h" +#include "bfd.h" +#include "bfdlink.h" +#include "ld.h" +#include "ldexp.h" +#include "ldver.h" +#include "ldlang.h" +#include "ldfile.h" +#include "ldemul.h" +#include "ldmisc.h" +#include "ldmain.h" +#include "mri.h" +#include "ldctor.h" +#include "ldlex.h" + +#ifndef YYDEBUG +#define YYDEBUG 1 +#endif + +static enum section_type sectype; +static lang_memory_region_type *region; + +FILE *saved_script_handle = NULL; +bfd_boolean force_make_executable = FALSE; + +bfd_boolean ldgram_in_script = FALSE; +bfd_boolean ldgram_had_equals = FALSE; +bfd_boolean ldgram_had_keep = FALSE; +char *ldgram_vers_current_lang = NULL; + +#define ERROR_NAME_MAX 20 +static char *error_names[ERROR_NAME_MAX]; +static int error_index; +#define PUSH_ERROR(x) if (error_index < ERROR_NAME_MAX) error_names[error_index] = x; error_index++; +#define POP_ERROR() error_index--; +%} +%union { + bfd_vma integer; + struct big_int + { + bfd_vma integer; + char *str; + } bigint; + fill_type *fill; + char *name; + const char *cname; + struct wildcard_spec wildcard; + struct wildcard_list *wildcard_list; + struct name_list *name_list; + int token; + union etree_union *etree; + struct phdr_info + { + bfd_boolean filehdr; + bfd_boolean phdrs; + union etree_union *at; + union etree_union *flags; + } phdr; + struct lang_nocrossref *nocrossref; + struct lang_output_section_phdr_list *section_phdr; + struct bfd_elf_version_deps *deflist; + struct bfd_elf_version_expr *versyms; + struct bfd_elf_version_tree *versnode; +} + +%type <etree> exp opt_exp_with_type mustbe_exp opt_at phdr_type phdr_val +%type <etree> opt_exp_without_type opt_subalign opt_align +%type <fill> fill_opt fill_exp +%type <name_list> exclude_name_list +%type <wildcard_list> file_NAME_list +%type <name> memspec_opt casesymlist +%type <name> memspec_at_opt +%type <cname> wildcard_name +%type <wildcard> wildcard_spec +%token <bigint> INT +%token <name> NAME LNAME +%type <integer> length +%type <phdr> phdr_qualifiers +%type <nocrossref> nocrossref_list +%type <section_phdr> phdr_opt +%type <integer> opt_nocrossrefs + +%right <token> PLUSEQ MINUSEQ MULTEQ DIVEQ '=' LSHIFTEQ RSHIFTEQ ANDEQ OREQ +%right <token> '?' ':' +%left <token> OROR +%left <token> ANDAND +%left <token> '|' +%left <token> '^' +%left <token> '&' +%left <token> EQ NE +%left <token> '<' '>' LE GE +%left <token> LSHIFT RSHIFT + +%left <token> '+' '-' +%left <token> '*' '/' '%' + +%right UNARY +%token END +%left <token> '(' +%token <token> ALIGN_K BLOCK BIND QUAD SQUAD LONG SHORT BYTE +%token SECTIONS PHDRS DATA_SEGMENT_ALIGN DATA_SEGMENT_RELRO_END DATA_SEGMENT_END +%token SORT_BY_NAME SORT_BY_ALIGNMENT +%token '{' '}' +%token SIZEOF_HEADERS OUTPUT_FORMAT FORCE_COMMON_ALLOCATION OUTPUT_ARCH +%token INHIBIT_COMMON_ALLOCATION +%token SEGMENT_START +%token INCLUDE +%token MEMORY +%token NOLOAD DSECT COPY INFO OVERLAY +%token DEFINED TARGET_K SEARCH_DIR MAP ENTRY +%token <integer> NEXT +%token SIZEOF ALIGNOF ADDR LOADADDR MAX_K MIN_K +%token STARTUP HLL SYSLIB FLOAT NOFLOAT NOCROSSREFS +%token ORIGIN FILL +%token LENGTH CREATE_OBJECT_SYMBOLS INPUT GROUP OUTPUT CONSTRUCTORS +%token ALIGNMOD AT SUBALIGN PROVIDE PROVIDE_HIDDEN AS_NEEDED +%type <token> assign_op atype attributes_opt sect_constraint +%type <name> filename +%token CHIP LIST SECT ABSOLUTE LOAD NEWLINE ENDWORD ORDER NAMEWORD ASSERT_K +%token FORMAT PUBLIC DEFSYMEND BASE ALIAS TRUNCATE REL +%token INPUT_SCRIPT INPUT_MRI_SCRIPT INPUT_DEFSYM CASE EXTERN START +%token <name> VERS_TAG VERS_IDENTIFIER +%token GLOBAL LOCAL VERSIONK INPUT_VERSION_SCRIPT +%token KEEP ONLY_IF_RO ONLY_IF_RW SPECIAL +%token EXCLUDE_FILE +%token CONSTANT +%type <versyms> vers_defns +%type <versnode> vers_tag +%type <deflist> verdep +%token INPUT_DYNAMIC_LIST + +%% + +file: + INPUT_SCRIPT script_file + | INPUT_MRI_SCRIPT mri_script_file + | INPUT_VERSION_SCRIPT version_script_file + | INPUT_DYNAMIC_LIST dynamic_list_file + | INPUT_DEFSYM defsym_expr + ; + + +filename: NAME; + + +defsym_expr: + { ldlex_defsym(); } + NAME '=' exp + { + ldlex_popstate(); + lang_add_assignment(exp_assop($3,$2,$4)); + } + ; + +/* SYNTAX WITHIN AN MRI SCRIPT FILE */ +mri_script_file: + { + ldlex_mri_script (); + PUSH_ERROR (_("MRI style script")); + } + mri_script_lines + { + ldlex_popstate (); + mri_draw_tree (); + POP_ERROR (); + } + ; + +mri_script_lines: + mri_script_lines mri_script_command NEWLINE + | + ; + +mri_script_command: + CHIP exp + | CHIP exp ',' exp + | NAME { + einfo(_("%P%F: unrecognised keyword in MRI style script '%s'\n"),$1); + } + | LIST { + config.map_filename = "-"; + } + | ORDER ordernamelist + | ENDWORD + | PUBLIC NAME '=' exp + { mri_public($2, $4); } + | PUBLIC NAME ',' exp + { mri_public($2, $4); } + | PUBLIC NAME exp + { mri_public($2, $3); } + | FORMAT NAME + { mri_format($2); } + | SECT NAME ',' exp + { mri_output_section($2, $4);} + | SECT NAME exp + { mri_output_section($2, $3);} + | SECT NAME '=' exp + { mri_output_section($2, $4);} + | ALIGN_K NAME '=' exp + { mri_align($2,$4); } + | ALIGN_K NAME ',' exp + { mri_align($2,$4); } + | ALIGNMOD NAME '=' exp + { mri_alignmod($2,$4); } + | ALIGNMOD NAME ',' exp + { mri_alignmod($2,$4); } + | ABSOLUTE mri_abs_name_list + | LOAD mri_load_name_list + | NAMEWORD NAME + { mri_name($2); } + | ALIAS NAME ',' NAME + { mri_alias($2,$4,0);} + | ALIAS NAME ',' INT + { mri_alias ($2, 0, (int) $4.integer); } + | BASE exp + { mri_base($2); } + | TRUNCATE INT + { mri_truncate ((unsigned int) $2.integer); } + | CASE casesymlist + | EXTERN extern_name_list + | INCLUDE filename + { ldlex_script (); ldfile_open_command_file($2); } + mri_script_lines END + { ldlex_popstate (); } + | START NAME + { lang_add_entry ($2, FALSE); } + | + ; + +ordernamelist: + ordernamelist ',' NAME { mri_order($3); } + | ordernamelist NAME { mri_order($2); } + | + ; + +mri_load_name_list: + NAME + { mri_load($1); } + | mri_load_name_list ',' NAME { mri_load($3); } + ; + +mri_abs_name_list: + NAME + { mri_only_load($1); } + | mri_abs_name_list ',' NAME + { mri_only_load($3); } + ; + +casesymlist: + /* empty */ { $$ = NULL; } + | NAME + | casesymlist ',' NAME + ; + +/* Parsed as expressions so that commas separate entries */ +extern_name_list: + { ldlex_expression (); } + extern_name_list_body + { ldlex_popstate (); } + +extern_name_list_body: + NAME + { ldlang_add_undef ($1); } + | extern_name_list_body NAME + { ldlang_add_undef ($2); } + | extern_name_list_body ',' NAME + { ldlang_add_undef ($3); } + ; + +script_file: + { ldlex_both(); } + ifile_list + { ldlex_popstate(); } + ; + +ifile_list: + ifile_list ifile_p1 + | + ; + + +ifile_p1: + memory + | sections + | phdrs + | startup + | high_level_library + | low_level_library + | floating_point_support + | statement_anywhere + | version + | ';' + | TARGET_K '(' NAME ')' + { lang_add_target($3); } + | SEARCH_DIR '(' filename ')' + { ldfile_add_library_path ($3, FALSE); } + | OUTPUT '(' filename ')' + { lang_add_output($3, 1); } + | OUTPUT_FORMAT '(' NAME ')' + { lang_add_output_format ($3, (char *) NULL, + (char *) NULL, 1); } + | OUTPUT_FORMAT '(' NAME ',' NAME ',' NAME ')' + { lang_add_output_format ($3, $5, $7, 1); } + | OUTPUT_ARCH '(' NAME ')' + { ldfile_set_output_arch ($3, bfd_arch_unknown); } + | FORCE_COMMON_ALLOCATION + { command_line.force_common_definition = TRUE ; } + | INHIBIT_COMMON_ALLOCATION + { command_line.inhibit_common_definition = TRUE ; } + | INPUT '(' input_list ')' + | GROUP + { lang_enter_group (); } + '(' input_list ')' + { lang_leave_group (); } + | MAP '(' filename ')' + { lang_add_map($3); } + | INCLUDE filename + { ldlex_script (); ldfile_open_command_file($2); } + ifile_list END + { ldlex_popstate (); } + | NOCROSSREFS '(' nocrossref_list ')' + { + lang_add_nocrossref ($3); + } + | EXTERN '(' extern_name_list ')' + ; + +input_list: + NAME + { lang_add_input_file($1,lang_input_file_is_search_file_enum, + (char *)NULL); } + | input_list ',' NAME + { lang_add_input_file($3,lang_input_file_is_search_file_enum, + (char *)NULL); } + | input_list NAME + { lang_add_input_file($2,lang_input_file_is_search_file_enum, + (char *)NULL); } + | LNAME + { lang_add_input_file($1,lang_input_file_is_l_enum, + (char *)NULL); } + | input_list ',' LNAME + { lang_add_input_file($3,lang_input_file_is_l_enum, + (char *)NULL); } + | input_list LNAME + { lang_add_input_file($2,lang_input_file_is_l_enum, + (char *)NULL); } + | AS_NEEDED '(' + { $<integer>$ = as_needed; as_needed = TRUE; } + input_list ')' + { as_needed = $<integer>3; } + | input_list ',' AS_NEEDED '(' + { $<integer>$ = as_needed; as_needed = TRUE; } + input_list ')' + { as_needed = $<integer>5; } + | input_list AS_NEEDED '(' + { $<integer>$ = as_needed; as_needed = TRUE; } + input_list ')' + { as_needed = $<integer>4; } + ; + +sections: + SECTIONS '{' sec_or_group_p1 '}' + ; + +sec_or_group_p1: + sec_or_group_p1 section + | sec_or_group_p1 statement_anywhere + | + ; + +statement_anywhere: + ENTRY '(' NAME ')' + { lang_add_entry ($3, FALSE); } + | assignment end + | ASSERT_K {ldlex_expression ();} '(' exp ',' NAME ')' + { ldlex_popstate (); + lang_add_assignment (exp_assert ($4, $6)); } + ; + +/* The '*' and '?' cases are there because the lexer returns them as + separate tokens rather than as NAME. */ +wildcard_name: + NAME + { + $$ = $1; + } + | '*' + { + $$ = "*"; + } + | '?' + { + $$ = "?"; + } + ; + +wildcard_spec: + wildcard_name + { + $$.name = $1; + $$.sorted = none; + $$.exclude_name_list = NULL; + } + | EXCLUDE_FILE '(' exclude_name_list ')' wildcard_name + { + $$.name = $5; + $$.sorted = none; + $$.exclude_name_list = $3; + } + | SORT_BY_NAME '(' wildcard_name ')' + { + $$.name = $3; + $$.sorted = by_name; + $$.exclude_name_list = NULL; + } + | SORT_BY_ALIGNMENT '(' wildcard_name ')' + { + $$.name = $3; + $$.sorted = by_alignment; + $$.exclude_name_list = NULL; + } + | SORT_BY_NAME '(' SORT_BY_ALIGNMENT '(' wildcard_name ')' ')' + { + $$.name = $5; + $$.sorted = by_name_alignment; + $$.exclude_name_list = NULL; + } + | SORT_BY_NAME '(' SORT_BY_NAME '(' wildcard_name ')' ')' + { + $$.name = $5; + $$.sorted = by_name; + $$.exclude_name_list = NULL; + } + | SORT_BY_ALIGNMENT '(' SORT_BY_NAME '(' wildcard_name ')' ')' + { + $$.name = $5; + $$.sorted = by_alignment_name; + $$.exclude_name_list = NULL; + } + | SORT_BY_ALIGNMENT '(' SORT_BY_ALIGNMENT '(' wildcard_name ')' ')' + { + $$.name = $5; + $$.sorted = by_alignment; + $$.exclude_name_list = NULL; + } + | SORT_BY_NAME '(' EXCLUDE_FILE '(' exclude_name_list ')' wildcard_name ')' + { + $$.name = $7; + $$.sorted = by_name; + $$.exclude_name_list = $5; + } + ; + +exclude_name_list: + exclude_name_list wildcard_name + { + struct name_list *tmp; + tmp = (struct name_list *) xmalloc (sizeof *tmp); + tmp->name = $2; + tmp->next = $1; + $$ = tmp; + } + | + wildcard_name + { + struct name_list *tmp; + tmp = (struct name_list *) xmalloc (sizeof *tmp); + tmp->name = $1; + tmp->next = NULL; + $$ = tmp; + } + ; + +file_NAME_list: + file_NAME_list opt_comma wildcard_spec + { + struct wildcard_list *tmp; + tmp = (struct wildcard_list *) xmalloc (sizeof *tmp); + tmp->next = $1; + tmp->spec = $3; + $$ = tmp; + } + | + wildcard_spec + { + struct wildcard_list *tmp; + tmp = (struct wildcard_list *) xmalloc (sizeof *tmp); + tmp->next = NULL; + tmp->spec = $1; + $$ = tmp; + } + ; + +input_section_spec_no_keep: + NAME + { + struct wildcard_spec tmp; + tmp.name = $1; + tmp.exclude_name_list = NULL; + tmp.sorted = none; + lang_add_wild (&tmp, NULL, ldgram_had_keep); + } + | '[' file_NAME_list ']' + { + lang_add_wild (NULL, $2, ldgram_had_keep); + } + | wildcard_spec '(' file_NAME_list ')' + { + lang_add_wild (&$1, $3, ldgram_had_keep); + } + ; + +input_section_spec: + input_section_spec_no_keep + | KEEP '(' + { ldgram_had_keep = TRUE; } + input_section_spec_no_keep ')' + { ldgram_had_keep = FALSE; } + ; + +statement: + assignment end + | CREATE_OBJECT_SYMBOLS + { + lang_add_attribute(lang_object_symbols_statement_enum); + } + | ';' + | CONSTRUCTORS + { + + lang_add_attribute(lang_constructors_statement_enum); + } + | SORT_BY_NAME '(' CONSTRUCTORS ')' + { + constructors_sorted = TRUE; + lang_add_attribute (lang_constructors_statement_enum); + } + | input_section_spec + | length '(' mustbe_exp ')' + { + lang_add_data ((int) $1, $3); + } + + | FILL '(' fill_exp ')' + { + lang_add_fill ($3); + } + | ASSERT_K {ldlex_expression ();} '(' exp ',' NAME ')' end + { ldlex_popstate (); + lang_add_assignment (exp_assert ($4, $6)); } + ; + +statement_list: + statement_list statement + | statement + ; + +statement_list_opt: + /* empty */ + | statement_list + ; + +length: + QUAD + { $$ = $1; } + | SQUAD + { $$ = $1; } + | LONG + { $$ = $1; } + | SHORT + { $$ = $1; } + | BYTE + { $$ = $1; } + ; + +fill_exp: + mustbe_exp + { + $$ = exp_get_fill ($1, 0, "fill value"); + } + ; + +fill_opt: + '=' fill_exp + { $$ = $2; } + | { $$ = (fill_type *) 0; } + ; + +assign_op: + PLUSEQ + { $$ = '+'; } + | MINUSEQ + { $$ = '-'; } + | MULTEQ + { $$ = '*'; } + | DIVEQ + { $$ = '/'; } + | LSHIFTEQ + { $$ = LSHIFT; } + | RSHIFTEQ + { $$ = RSHIFT; } + | ANDEQ + { $$ = '&'; } + | OREQ + { $$ = '|'; } + + ; + +end: ';' | ',' + ; + + +assignment: + NAME '=' mustbe_exp + { + lang_add_assignment (exp_assop ($2, $1, $3)); + } + | NAME assign_op mustbe_exp + { + lang_add_assignment (exp_assop ('=', $1, + exp_binop ($2, + exp_nameop (NAME, + $1), + $3))); + } + | PROVIDE '(' NAME '=' mustbe_exp ')' + { + lang_add_assignment (exp_provide ($3, $5, FALSE)); + } + | PROVIDE_HIDDEN '(' NAME '=' mustbe_exp ')' + { + lang_add_assignment (exp_provide ($3, $5, TRUE)); + } + ; + + +opt_comma: + ',' | ; + + +memory: + MEMORY '{' memory_spec memory_spec_list '}' + ; + +memory_spec_list: + memory_spec_list memory_spec + | memory_spec_list ',' memory_spec + | + ; + + +memory_spec: NAME + { region = lang_memory_region_lookup ($1, TRUE); } + attributes_opt ':' + origin_spec opt_comma length_spec + {} + ; + +origin_spec: + ORIGIN '=' mustbe_exp + { + region->origin = exp_get_vma ($3, 0, "origin"); + region->current = region->origin; + } + ; + +length_spec: + LENGTH '=' mustbe_exp + { + region->length = exp_get_vma ($3, -1, "length"); + } + ; + +attributes_opt: + /* empty */ + { /* dummy action to avoid bison 1.25 error message */ } + | '(' attributes_list ')' + ; + +attributes_list: + attributes_string + | attributes_list attributes_string + ; + +attributes_string: + NAME + { lang_set_flags (region, $1, 0); } + | '!' NAME + { lang_set_flags (region, $2, 1); } + ; + +startup: + STARTUP '(' filename ')' + { lang_startup($3); } + ; + +high_level_library: + HLL '(' high_level_library_NAME_list ')' + | HLL '(' ')' + { ldemul_hll((char *)NULL); } + ; + +high_level_library_NAME_list: + high_level_library_NAME_list opt_comma filename + { ldemul_hll($3); } + | filename + { ldemul_hll($1); } + + ; + +low_level_library: + SYSLIB '(' low_level_library_NAME_list ')' + ; low_level_library_NAME_list: + low_level_library_NAME_list opt_comma filename + { ldemul_syslib($3); } + | + ; + +floating_point_support: + FLOAT + { lang_float(TRUE); } + | NOFLOAT + { lang_float(FALSE); } + ; + +nocrossref_list: + /* empty */ + { + $$ = NULL; + } + | NAME nocrossref_list + { + struct lang_nocrossref *n; + + n = (struct lang_nocrossref *) xmalloc (sizeof *n); + n->name = $1; + n->next = $2; + $$ = n; + } + | NAME ',' nocrossref_list + { + struct lang_nocrossref *n; + + n = (struct lang_nocrossref *) xmalloc (sizeof *n); + n->name = $1; + n->next = $3; + $$ = n; + } + ; + +mustbe_exp: { ldlex_expression (); } + exp + { ldlex_popstate (); $$=$2;} + ; + +exp : + '-' exp %prec UNARY + { $$ = exp_unop ('-', $2); } + | '(' exp ')' + { $$ = $2; } + | NEXT '(' exp ')' %prec UNARY + { $$ = exp_unop ((int) $1,$3); } + | '!' exp %prec UNARY + { $$ = exp_unop ('!', $2); } + | '+' exp %prec UNARY + { $$ = $2; } + | '~' exp %prec UNARY + { $$ = exp_unop ('~', $2);} + + | exp '*' exp + { $$ = exp_binop ('*', $1, $3); } + | exp '/' exp + { $$ = exp_binop ('/', $1, $3); } + | exp '%' exp + { $$ = exp_binop ('%', $1, $3); } + | exp '+' exp + { $$ = exp_binop ('+', $1, $3); } + | exp '-' exp + { $$ = exp_binop ('-' , $1, $3); } + | exp LSHIFT exp + { $$ = exp_binop (LSHIFT , $1, $3); } + | exp RSHIFT exp + { $$ = exp_binop (RSHIFT , $1, $3); } + | exp EQ exp + { $$ = exp_binop (EQ , $1, $3); } + | exp NE exp + { $$ = exp_binop (NE , $1, $3); } + | exp LE exp + { $$ = exp_binop (LE , $1, $3); } + | exp GE exp + { $$ = exp_binop (GE , $1, $3); } + | exp '<' exp + { $$ = exp_binop ('<' , $1, $3); } + | exp '>' exp + { $$ = exp_binop ('>' , $1, $3); } + | exp '&' exp + { $$ = exp_binop ('&' , $1, $3); } + | exp '^' exp + { $$ = exp_binop ('^' , $1, $3); } + | exp '|' exp + { $$ = exp_binop ('|' , $1, $3); } + | exp '?' exp ':' exp + { $$ = exp_trinop ('?' , $1, $3, $5); } + | exp ANDAND exp + { $$ = exp_binop (ANDAND , $1, $3); } + | exp OROR exp + { $$ = exp_binop (OROR , $1, $3); } + | DEFINED '(' NAME ')' + { $$ = exp_nameop (DEFINED, $3); } + | INT + { $$ = exp_bigintop ($1.integer, $1.str); } + | SIZEOF_HEADERS + { $$ = exp_nameop (SIZEOF_HEADERS,0); } + + | ALIGNOF '(' NAME ')' + { $$ = exp_nameop (ALIGNOF,$3); } + | SIZEOF '(' NAME ')' + { $$ = exp_nameop (SIZEOF,$3); } + | ADDR '(' NAME ')' + { $$ = exp_nameop (ADDR,$3); } + | LOADADDR '(' NAME ')' + { $$ = exp_nameop (LOADADDR,$3); } + | CONSTANT '(' NAME ')' + { $$ = exp_nameop (CONSTANT,$3); } + | ABSOLUTE '(' exp ')' + { $$ = exp_unop (ABSOLUTE, $3); } + | ALIGN_K '(' exp ')' + { $$ = exp_unop (ALIGN_K,$3); } + | ALIGN_K '(' exp ',' exp ')' + { $$ = exp_binop (ALIGN_K,$3,$5); } + | DATA_SEGMENT_ALIGN '(' exp ',' exp ')' + { $$ = exp_binop (DATA_SEGMENT_ALIGN, $3, $5); } + | DATA_SEGMENT_RELRO_END '(' exp ',' exp ')' + { $$ = exp_binop (DATA_SEGMENT_RELRO_END, $5, $3); } + | DATA_SEGMENT_END '(' exp ')' + { $$ = exp_unop (DATA_SEGMENT_END, $3); } + | SEGMENT_START '(' NAME ',' exp ')' + { /* The operands to the expression node are + placed in the opposite order from the way + in which they appear in the script as + that allows us to reuse more code in + fold_binary. */ + $$ = exp_binop (SEGMENT_START, + $5, + exp_nameop (NAME, $3)); } + | BLOCK '(' exp ')' + { $$ = exp_unop (ALIGN_K,$3); } + | NAME + { $$ = exp_nameop (NAME,$1); } + | MAX_K '(' exp ',' exp ')' + { $$ = exp_binop (MAX_K, $3, $5 ); } + | MIN_K '(' exp ',' exp ')' + { $$ = exp_binop (MIN_K, $3, $5 ); } + | ASSERT_K '(' exp ',' NAME ')' + { $$ = exp_assert ($3, $5); } + | ORIGIN '(' NAME ')' + { $$ = exp_nameop (ORIGIN, $3); } + | LENGTH '(' NAME ')' + { $$ = exp_nameop (LENGTH, $3); } + ; + + +memspec_at_opt: + AT '>' NAME { $$ = $3; } + | { $$ = 0; } + ; + +opt_at: + AT '(' exp ')' { $$ = $3; } + | { $$ = 0; } + ; + +opt_align: + ALIGN_K '(' exp ')' { $$ = $3; } + | { $$ = 0; } + ; + +opt_subalign: + SUBALIGN '(' exp ')' { $$ = $3; } + | { $$ = 0; } + ; + +sect_constraint: + ONLY_IF_RO { $$ = ONLY_IF_RO; } + | ONLY_IF_RW { $$ = ONLY_IF_RW; } + | SPECIAL { $$ = SPECIAL; } + | { $$ = 0; } + ; + +section: NAME { ldlex_expression(); } + opt_exp_with_type + opt_at + opt_align + opt_subalign { ldlex_popstate (); ldlex_script (); } + sect_constraint + '{' + { + lang_enter_output_section_statement($1, $3, + sectype, + $5, $6, $4, $8); + } + statement_list_opt + '}' { ldlex_popstate (); ldlex_expression (); } + memspec_opt memspec_at_opt phdr_opt fill_opt + { + ldlex_popstate (); + lang_leave_output_section_statement ($17, $14, $16, $15); + } + opt_comma + {} + | OVERLAY + { ldlex_expression (); } + opt_exp_without_type opt_nocrossrefs opt_at opt_subalign + { ldlex_popstate (); ldlex_script (); } + '{' + { + lang_enter_overlay ($3, $6); + } + overlay_section + '}' + { ldlex_popstate (); ldlex_expression (); } + memspec_opt memspec_at_opt phdr_opt fill_opt + { + ldlex_popstate (); + lang_leave_overlay ($5, (int) $4, + $16, $13, $15, $14); + } + opt_comma + | /* The GROUP case is just enough to support the gcc + svr3.ifile script. It is not intended to be full + support. I'm not even sure what GROUP is supposed + to mean. */ + GROUP { ldlex_expression (); } + opt_exp_with_type + { + ldlex_popstate (); + lang_add_assignment (exp_assop ('=', ".", $3)); + } + '{' sec_or_group_p1 '}' + ; + +type: + NOLOAD { sectype = noload_section; } + | DSECT { sectype = noalloc_section; } + | COPY { sectype = noalloc_section; } + | INFO { sectype = noalloc_section; } + | OVERLAY { sectype = noalloc_section; } + ; + +atype: + '(' type ')' + | /* EMPTY */ { sectype = normal_section; } + | '(' ')' { sectype = normal_section; } + ; + +opt_exp_with_type: + exp atype ':' { $$ = $1; } + | atype ':' { $$ = (etree_type *)NULL; } + | /* The BIND cases are to support the gcc svr3.ifile + script. They aren't intended to implement full + support for the BIND keyword. I'm not even sure + what BIND is supposed to mean. */ + BIND '(' exp ')' atype ':' { $$ = $3; } + | BIND '(' exp ')' BLOCK '(' exp ')' atype ':' + { $$ = $3; } + ; + +opt_exp_without_type: + exp ':' { $$ = $1; } + | ':' { $$ = (etree_type *) NULL; } + ; + +opt_nocrossrefs: + /* empty */ + { $$ = 0; } + | NOCROSSREFS + { $$ = 1; } + ; + +memspec_opt: + '>' NAME + { $$ = $2; } + | { $$ = DEFAULT_MEMORY_REGION; } + ; + +phdr_opt: + /* empty */ + { + $$ = NULL; + } + | phdr_opt ':' NAME + { + struct lang_output_section_phdr_list *n; + + n = ((struct lang_output_section_phdr_list *) + xmalloc (sizeof *n)); + n->name = $3; + n->used = FALSE; + n->next = $1; + $$ = n; + } + ; + +overlay_section: + /* empty */ + | overlay_section + NAME + { + ldlex_script (); + lang_enter_overlay_section ($2); + } + '{' statement_list_opt '}' + { ldlex_popstate (); ldlex_expression (); } + phdr_opt fill_opt + { + ldlex_popstate (); + lang_leave_overlay_section ($9, $8); + } + opt_comma + ; + +phdrs: + PHDRS '{' phdr_list '}' + ; + +phdr_list: + /* empty */ + | phdr_list phdr + ; + +phdr: + NAME { ldlex_expression (); } + phdr_type phdr_qualifiers { ldlex_popstate (); } + ';' + { + lang_new_phdr ($1, $3, $4.filehdr, $4.phdrs, $4.at, + $4.flags); + } + ; + +phdr_type: + exp + { + $$ = $1; + + if ($1->type.node_class == etree_name + && $1->type.node_code == NAME) + { + const char *s; + unsigned int i; + static const char * const phdr_types[] = + { + "PT_NULL", "PT_LOAD", "PT_DYNAMIC", + "PT_INTERP", "PT_NOTE", "PT_SHLIB", + "PT_PHDR", "PT_TLS" + }; + + s = $1->name.name; + for (i = 0; + i < sizeof phdr_types / sizeof phdr_types[0]; + i++) + if (strcmp (s, phdr_types[i]) == 0) + { + $$ = exp_intop (i); + break; + } + if (i == sizeof phdr_types / sizeof phdr_types[0]) + { + if (strcmp (s, "PT_GNU_EH_FRAME") == 0) + $$ = exp_intop (0x6474e550); + else if (strcmp (s, "PT_GNU_STACK") == 0) + $$ = exp_intop (0x6474e551); + else + { + einfo (_("\ +%X%P:%S: unknown phdr type `%s' (try integer literal)\n"), + s); + $$ = exp_intop (0); + } + } + } + } + ; + +phdr_qualifiers: + /* empty */ + { + memset (&$$, 0, sizeof (struct phdr_info)); + } + | NAME phdr_val phdr_qualifiers + { + $$ = $3; + if (strcmp ($1, "FILEHDR") == 0 && $2 == NULL) + $$.filehdr = TRUE; + else if (strcmp ($1, "PHDRS") == 0 && $2 == NULL) + $$.phdrs = TRUE; + else if (strcmp ($1, "FLAGS") == 0 && $2 != NULL) + $$.flags = $2; + else + einfo (_("%X%P:%S: PHDRS syntax error at `%s'\n"), $1); + } + | AT '(' exp ')' phdr_qualifiers + { + $$ = $5; + $$.at = $3; + } + ; + +phdr_val: + /* empty */ + { + $$ = NULL; + } + | '(' exp ')' + { + $$ = $2; + } + ; + +dynamic_list_file: + { + ldlex_version_file (); + PUSH_ERROR (_("dynamic list")); + } + dynamic_list_nodes + { + ldlex_popstate (); + POP_ERROR (); + } + ; + +dynamic_list_nodes: + dynamic_list_node + | dynamic_list_nodes dynamic_list_node + ; + +dynamic_list_node: + '{' dynamic_list_tag '}' ';' + ; + +dynamic_list_tag: + vers_defns ';' + { + lang_append_dynamic_list ($1); + } + ; + +/* This syntax is used within an external version script file. */ + +version_script_file: + { + ldlex_version_file (); + PUSH_ERROR (_("VERSION script")); + } + vers_nodes + { + ldlex_popstate (); + POP_ERROR (); + } + ; + +/* This is used within a normal linker script file. */ + +version: + { + ldlex_version_script (); + } + VERSIONK '{' vers_nodes '}' + { + ldlex_popstate (); + } + ; + +vers_nodes: + vers_node + | vers_nodes vers_node + ; + +vers_node: + '{' vers_tag '}' ';' + { + lang_register_vers_node (NULL, $2, NULL); + } + | VERS_TAG '{' vers_tag '}' ';' + { + lang_register_vers_node ($1, $3, NULL); + } + | VERS_TAG '{' vers_tag '}' verdep ';' + { + lang_register_vers_node ($1, $3, $5); + } + ; + +verdep: + VERS_TAG + { + $$ = lang_add_vers_depend (NULL, $1); + } + | verdep VERS_TAG + { + $$ = lang_add_vers_depend ($1, $2); + } + ; + +vers_tag: + /* empty */ + { + $$ = lang_new_vers_node (NULL, NULL); + } + | vers_defns ';' + { + $$ = lang_new_vers_node ($1, NULL); + } + | GLOBAL ':' vers_defns ';' + { + $$ = lang_new_vers_node ($3, NULL); + } + | LOCAL ':' vers_defns ';' + { + $$ = lang_new_vers_node (NULL, $3); + } + | GLOBAL ':' vers_defns ';' LOCAL ':' vers_defns ';' + { + $$ = lang_new_vers_node ($3, $7); + } + ; + +vers_defns: + VERS_IDENTIFIER + { + $$ = lang_new_vers_pattern (NULL, $1, ldgram_vers_current_lang, FALSE); + } + | NAME + { + $$ = lang_new_vers_pattern (NULL, $1, ldgram_vers_current_lang, TRUE); + } + | vers_defns ';' VERS_IDENTIFIER + { + $$ = lang_new_vers_pattern ($1, $3, ldgram_vers_current_lang, FALSE); + } + | vers_defns ';' NAME + { + $$ = lang_new_vers_pattern ($1, $3, ldgram_vers_current_lang, TRUE); + } + | vers_defns ';' EXTERN NAME '{' + { + $<name>$ = ldgram_vers_current_lang; + ldgram_vers_current_lang = $4; + } + vers_defns opt_semicolon '}' + { + struct bfd_elf_version_expr *pat; + for (pat = $7; pat->next != NULL; pat = pat->next); + pat->next = $1; + $$ = $7; + ldgram_vers_current_lang = $<name>6; + } + | EXTERN NAME '{' + { + $<name>$ = ldgram_vers_current_lang; + ldgram_vers_current_lang = $2; + } + vers_defns opt_semicolon '}' + { + $$ = $5; + ldgram_vers_current_lang = $<name>4; + } + | GLOBAL + { + $$ = lang_new_vers_pattern (NULL, "global", ldgram_vers_current_lang, FALSE); + } + | vers_defns ';' GLOBAL + { + $$ = lang_new_vers_pattern ($1, "global", ldgram_vers_current_lang, FALSE); + } + | LOCAL + { + $$ = lang_new_vers_pattern (NULL, "local", ldgram_vers_current_lang, FALSE); + } + | vers_defns ';' LOCAL + { + $$ = lang_new_vers_pattern ($1, "local", ldgram_vers_current_lang, FALSE); + } + | EXTERN + { + $$ = lang_new_vers_pattern (NULL, "extern", ldgram_vers_current_lang, FALSE); + } + | vers_defns ';' EXTERN + { + $$ = lang_new_vers_pattern ($1, "extern", ldgram_vers_current_lang, FALSE); + } + ; + +opt_semicolon: + /* empty */ + | ';' + ; + +%% +void +yyerror(arg) + const char *arg; +{ + if (ldfile_assumed_script) + einfo (_("%P:%s: file format not recognized; treating as linker script\n"), + ldfile_input_filename); + if (error_index > 0 && error_index < ERROR_NAME_MAX) + einfo ("%P%F:%S: %s in %s\n", arg, error_names[error_index-1]); + else + einfo ("%P%F:%S: %s\n", arg); +} |