X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gold%2Fyyscript.y;h=dfb5e4e702b635682cac9d249146623fc22ffd65;hb=3cb5a3a16af2cae1a5059b7571c514b3fa575df9;hp=ca2835fb7e74cf7e6f79b12caf77709c9677afb1;hpb=0dfbdef4c43cfe12bb3e2505ebe5acc651a35c98;p=deliverable%2Fbinutils-gdb.git diff --git a/gold/yyscript.y b/gold/yyscript.y index ca2835fb7e..dfb5e4e702 100644 --- a/gold/yyscript.y +++ b/gold/yyscript.y @@ -1,6 +1,6 @@ -/* yyscript.y -- linker script grammer for gold. */ +/* yyscript.y -- linker script grammar for gold. */ -/* Copyright 2006, 2007, 2008 Free Software Foundation, Inc. +/* Copyright (C) 2006-2019 Free Software Foundation, Inc. Written by Ian Lance Taylor . This file is part of gold. @@ -77,6 +77,7 @@ struct Version_dependency_list* deplist; struct Version_expression_list* versyms; struct Version_tree* versnode; + enum Script_section_type section_type; } /* Operators, including a precedence table for expressions. */ @@ -121,11 +122,13 @@ %token BYTE %token CONSTANT %token CONSTRUCTORS +%token COPY %token CREATE_OBJECT_SYMBOLS %token DATA_SEGMENT_ALIGN %token DATA_SEGMENT_END %token DATA_SEGMENT_RELRO_END %token DEFINED +%token DSECT %token ENTRY %token EXCLUDE_FILE %token EXTERN @@ -134,11 +137,14 @@ %token FORCE_COMMON_ALLOCATION %token GLOBAL /* global */ %token GROUP +%token HIDDEN %token HLL %token INCLUDE %token INHIBIT_COMMON_ALLOCATION +%token INFO %token INPUT %token KEEP +%token LEN %token LENGTH /* LENGTH, l, len */ %token LOADADDR %token LOCAL /* local */ @@ -150,8 +156,10 @@ %token NEXT %token NOCROSSREFS %token NOFLOAT +%token NOLOAD %token ONLY_IF_RO %token ONLY_IF_RW +%token ORG %token ORIGIN /* ORIGIN, o, org */ %token OUTPUT %token OUTPUT_ARCH @@ -168,6 +176,7 @@ %token SIZEOF %token SIZEOF_HEADERS /* SIZEOF_HEADERS, sizeof_headers */ %token SORT_BY_ALIGNMENT +%token SORT_BY_INIT_PRIORITY %token SORT_BY_NAME %token SPECIAL %token SQUAD @@ -193,12 +202,17 @@ %token PARSING_LINKER_SCRIPT %token PARSING_VERSION_SCRIPT %token PARSING_DEFSYM +%token PARSING_DYNAMIC_LIST +%token PARSING_SECTIONS_BLOCK +%token PARSING_SECTION_COMMANDS +%token PARSING_MEMORY_DEF /* Non-terminal types, where needed. */ -%type parse_exp exp opt_address_and_section_type +%type parse_exp exp %type opt_at opt_align opt_subalign opt_fill -%type section_header +%type section_header opt_address_and_section_type +%type section_type %type section_trailer %type opt_constraint %type opt_phdr @@ -208,7 +222,7 @@ %type wildcard_file wildcard_section %type exclude_names %type wildcard_name -%type phdr_type +%type phdr_type memory_attr %type phdr_info %type vers_defns %type vers_tag @@ -222,6 +236,10 @@ top: PARSING_LINKER_SCRIPT linker_script | PARSING_VERSION_SCRIPT version_script | PARSING_DEFSYM defsym_expr + | PARSING_DYNAMIC_LIST dynamic_list_expr + | PARSING_SECTIONS_BLOCK sections_block + | PARSING_SECTION_COMMANDS section_cmds + | PARSING_MEMORY_DEF memory_defs ; /* A file contains a list of commands. */ @@ -232,7 +250,8 @@ linker_script: /* A command which may appear at top level of a linker script. */ file_cmd: - FORCE_COMMON_ALLOCATION + EXTERN '(' extern_name_list ')' + | FORCE_COMMON_ALLOCATION { script_set_common_allocation(closure, 1); } | GROUP { script_start_group(closure); } @@ -240,8 +259,23 @@ file_cmd: { script_end_group(closure); } | INHIBIT_COMMON_ALLOCATION { script_set_common_allocation(closure, 0); } + | INPUT '(' input_list ')' + | MEMORY '{' memory_defs '}' | OPTION '(' string ')' { script_parse_option(closure, $3.value, $3.length); } + | OUTPUT_FORMAT '(' string ')' + { + if (!script_check_output_format(closure, $3.value, $3.length, + NULL, 0, NULL, 0)) + YYABORT; + } + | OUTPUT_FORMAT '(' string ',' string ',' string ')' + { + if (!script_check_output_format(closure, $3.value, $3.length, + $5.value, $5.length, + $7.value, $7.length)) + YYABORT; + } | PHDRS '{' phdrs_defs '}' | SEARCH_DIR '(' string ')' { script_add_search_dir(closure, $3.value, $3.length); } @@ -249,11 +283,20 @@ file_cmd: { script_start_sections(closure); } sections_block '}' { script_finish_sections(closure); } + | TARGET_K '(' string ')' + { script_set_target(closure, $3.value, $3.length); } | VERSIONK '{' { script_push_lex_into_version_mode(closure); } version_script '}' { script_pop_lex_mode(closure); } - | file_or_sections_cmd + | ENTRY '(' string ')' + { script_set_entry(closure, $3.value, $3.length); } + | assignment end + | ASSERT_K '(' parse_exp ',' string ')' + { script_add_assertion(closure, $3, $5.value, $5.length); } + | INCLUDE string + { script_include_directive(PARSING_LINKER_SCRIPT, closure, + $2.value, $2.length); } | ignore_cmd | ';' ; @@ -263,9 +306,26 @@ file_cmd: these is more-or-less OK since most scripts simply explicitly choose the default. */ ignore_cmd: - OUTPUT_FORMAT '(' string ')' - | OUTPUT_FORMAT '(' string ',' string ',' string ')' - | OUTPUT_ARCH '(' string ')' + OUTPUT_ARCH '(' string ')' + ; + +/* A list of external undefined symbols. We put the lexer into + expression mode so that commas separate names; this is what the GNU + linker does. */ + +extern_name_list: + { script_push_lex_into_expression_mode(closure); } + extern_name_list_body + { script_pop_lex_mode(closure); } + ; + +extern_name_list_body: + string + { script_add_extern(closure, $1.value, $1.length); } + | extern_name_list_body string + { script_add_extern(closure, $2.value, $2.length); } + | extern_name_list_body ',' string + { script_add_extern(closure, $3.value, $3.length); } ; /* A list of input file names. */ @@ -278,6 +338,8 @@ input_list: input_list_element: string { script_add_file(closure, $1.value, $1.length); } + | '-' STRING + { script_add_library(closure, $2.value, $2.length); } | AS_NEEDED { script_start_as_needed(closure); } '(' input_list ')' @@ -292,7 +354,14 @@ sections_block: /* A command which may appear within a SECTIONS block. */ section_block_cmd: - file_or_sections_cmd + ENTRY '(' string ')' + { script_set_entry(closure, $3.value, $3.length); } + | assignment end + | ASSERT_K '(' parse_exp ',' string ')' + { script_add_assertion(closure, $3, $5.value, $5.length); } + | INCLUDE string + { script_include_directive(PARSING_SECTIONS_BLOCK, closure, + $2.value, $2.length); } | string section_header { script_start_output_section(closure, $1.value, $1.length, &$2); } '{' section_cmds '}' section_trailer @@ -307,7 +376,8 @@ section_header: { script_pop_lex_mode(closure); } opt_constraint { - $$.address = $2; + $$.address = $2.address; + $$.section_type = $2.section_type; $$.load_address = $3; $$.align = $4; $$.subalign = $5; @@ -320,18 +390,61 @@ section_header: '(' in section_header. */ opt_address_and_section_type: - ':' - { $$ = NULL; } + ':' + { + $$.address = NULL; + $$.section_type = SCRIPT_SECTION_TYPE_NONE; + } | '(' ')' ':' - { $$ = NULL; } + { + $$.address = NULL; + $$.section_type = SCRIPT_SECTION_TYPE_NONE; + } | exp ':' - { $$ = $1; } + { + $$.address = $1; + $$.section_type = SCRIPT_SECTION_TYPE_NONE; + } | exp '(' ')' ':' - { $$ = $1; } - | exp '(' string ')' ':' { - yyerror(closure, "section types are not supported"); - $$ = $1; + $$.address = $1; + $$.section_type = SCRIPT_SECTION_TYPE_NONE; + } + | '(' section_type ')' ':' + { + $$.address = NULL; + $$.section_type = $2; + } + | exp '(' section_type ')' ':' + { + $$.address = $1; + $$.section_type = $3; + } + ; + +/* We only support NOLOAD. */ +section_type: + NOLOAD + { $$ = SCRIPT_SECTION_TYPE_NOLOAD; } + | DSECT + { + yyerror(closure, "DSECT section type is unsupported"); + $$ = SCRIPT_SECTION_TYPE_DSECT; + } + | COPY + { + yyerror(closure, "COPY section type is unsupported"); + $$ = SCRIPT_SECTION_TYPE_COPY; + } + | INFO + { + yyerror(closure, "INFO section type is unsupported"); + $$ = SCRIPT_SECTION_TYPE_INFO; + } + | OVERLAY + { + yyerror(closure, "OVERLAY section type is unsupported"); + $$ = SCRIPT_SECTION_TYPE_OVERLAY; } ; @@ -383,14 +496,14 @@ section_trailer: /* A memory specification for an output section. */ opt_memspec: '>' string - { yyerror(closure, "memory regions are not supported"); } + { script_set_section_region(closure, $2.value, $2.length, 1); } | /* empty */ ; /* A memory specification for where to load an output section. */ opt_at_memspec: AT '>' string - { yyerror(closure, "memory regions are not supported"); } + { script_set_section_region(closure, $3.value, $3.length, 0); } | /* empty */ ; @@ -437,6 +550,9 @@ section_cmd: nothing, we accept it and ignore it. */ } | SORT_BY_NAME '(' CONSTRUCTORS ')' + | INCLUDE string + { script_include_directive(PARSING_SECTION_COMMANDS, closure, + $2.value, $2.length); } | ';' ; @@ -563,6 +679,11 @@ wildcard_section: abort(); } } + | SORT_BY_INIT_PRIORITY '(' wildcard_name ')' + { + $$.name = $3; + $$.sort = SORT_WILDCARD_BY_INIT_PRIORITY; + } ; /* A list of file names to exclude. */ @@ -590,14 +711,48 @@ wildcard_name: } ; -/* A command which may appear at the top level of a linker script, or - within a SECTIONS block. */ -file_or_sections_cmd: - ENTRY '(' string ')' - { script_set_entry(closure, $3.value, $3.length); } - | assignment end - | ASSERT_K '(' parse_exp ',' string ')' - { script_add_assertion(closure, $3, $5.value, $5.length); } +/* A list of MEMORY definitions. */ +memory_defs: + memory_defs opt_comma memory_def + | /* empty */ + ; + +/* A single MEMORY definition. */ +memory_def: + string memory_attr ':' memory_origin '=' parse_exp opt_comma memory_length '=' parse_exp + { script_add_memory(closure, $1.value, $1.length, $2, $6, $10); } + | + INCLUDE string + { script_include_directive(PARSING_MEMORY_DEF, closure, + $2.value, $2.length); } + | + ; + +/* The (optional) attributes of a MEMORY region. */ +memory_attr: + '(' string ')' + { $$ = script_parse_memory_attr(closure, $2.value, $2.length, 0); } + | /* Inverted attributes. */ + '(' '!' string ')' + { $$ = script_parse_memory_attr(closure, $3.value, $3.length, 1); } + | /* empty */ + { $$ = 0; } + ; + +memory_origin: + ORIGIN + | + ORG + | + 'o' + ; + +memory_length: + LENGTH + | + LEN + | + 'l' ; /* A list of program header definitions. */ @@ -710,6 +865,8 @@ assignment: Expression_ptr e = script_exp_binary_bitwise_or(s, $3); script_set_symbol(closure, $1.value, $1.length, e, 0, 0); } + | HIDDEN '(' string '=' parse_exp ')' + { script_set_symbol(closure, $3.value, $3.length, $5, 0, 1); } | PROVIDE '(' string '=' parse_exp ')' { script_set_symbol(closure, $3.value, $3.length, $5, 1, 0); } | PROVIDE_HIDDEN '(' string '=' parse_exp ')' @@ -779,7 +936,7 @@ exp: | INTEGER { $$ = script_exp_integer($1); } | string - { $$ = script_exp_string($1.value, $1.length); } + { $$ = script_symbol(closure, $1.value, $1.length); } | MAX_K '(' exp ',' exp ')' { $$ = script_exp_function_max($3, $5); } | MIN_K '(' exp ',' exp ')' @@ -797,9 +954,9 @@ exp: | LOADADDR '(' string ')' { $$ = script_exp_function_loadaddr($3.value, $3.length); } | ORIGIN '(' string ')' - { $$ = script_exp_function_origin($3.value, $3.length); } + { $$ = script_exp_function_origin(closure, $3.value, $3.length); } | LENGTH '(' string ')' - { $$ = script_exp_function_length($3.value, $3.length); } + { $$ = script_exp_function_length(closure, $3.value, $3.length); } | CONSTANT '(' string ')' { $$ = script_exp_function_constant($3.value, $3.length); } | ABSOLUTE '(' exp ')' @@ -811,14 +968,24 @@ exp: | BLOCK '(' exp ')' { $$ = script_exp_function_align(script_exp_string(".", 1), $3); } | DATA_SEGMENT_ALIGN '(' exp ',' exp ')' - { $$ = script_exp_function_data_segment_align($3, $5); } + { + script_data_segment_align(closure); + $$ = script_exp_function_data_segment_align($3, $5); + } | DATA_SEGMENT_RELRO_END '(' exp ',' exp ')' - { $$ = script_exp_function_data_segment_relro_end($3, $5); } + { + script_data_segment_relro_end(closure); + $$ = script_exp_function_data_segment_relro_end($3, $5); + } | DATA_SEGMENT_END '(' exp ')' { $$ = script_exp_function_data_segment_end($3); } | SEGMENT_START '(' string ',' exp ')' { $$ = script_exp_function_segment_start($3.value, $3.length, $5); + /* We need to take note of any SEGMENT_START expressions + because they change the behaviour of -Ttext, -Tdata and + -Tbss options. */ + script_saw_segment_start_expression(closure); } | ASSERT_K '(' exp ',' string ')' { $$ = script_exp_function_assert($3, $5.value, $5.length); } @@ -830,6 +997,24 @@ defsym_expr: { script_set_symbol(closure, $1.value, $1.length, $3, 0, 0); } ; +/* Handle the --dynamic-list option. A dynamic list has the format + { sym1; sym2; extern "C++" { namespace::sym3 }; }; + We store the symbol we see in the "local" list; that is where + Command_line::in_dynamic_list() will look to do its check. + TODO(csilvers): More than one of these brace-lists can appear, and + should just be merged and treated as a single list. */ +dynamic_list_expr: dynamic_list_nodes ; + +dynamic_list_nodes: + dynamic_list_node + | dynamic_list_nodes dynamic_list_node + ; + +dynamic_list_node: + '{' vers_defns ';' '}' ';' + { script_new_vers_node (closure, NULL, $2); } + ; + /* A version script. */ version_script: vers_nodes