Support -d/--define-common.

[deliverable/binutils-gdb.git] / gold / yyscript.y

diff --git a/gold/yyscript.y b/gold/yyscript.y
index ad7670904f4fdcd4cd77ec96b790024a804c7e76..ca2835fb7e74cf7e6f79b12caf77709c9677afb1 100644 (file)
--- a/gold/yyscript.y
+++ b/gold/yyscript.y
@@ -30,6 +30,7 @@
 #include <stddef.h>
 #include <stdint.h>
 #include <stdlib.h>
+#include <string.h>
 
 #include "script-c.h"
 
@@ -70,6 +71,8 @@
   struct Wildcard_section wildcard_section;
   /* A list of strings.  */
   String_list_ptr string_list;
+  /* Information for a program header.  */
+  struct Phdr_info phdr_info;
   /* Used for version scripts and within VERSION {}.  */
   struct Version_dependency_list* deplist;
   struct Version_expression_list* versyms;
@@ -198,12 +201,15 @@
 %type <output_section_header> section_header
 %type <output_section_trailer> section_trailer
 %type <constraint> opt_constraint
+%type <string_list> opt_phdr
 %type <integer> data_length
 %type <input_section_spec> input_section_no_keep
 %type <wildcard_sections> wildcard_sections
 %type <wildcard_section> wildcard_file wildcard_section
 %type <string_list> exclude_names
 %type <string> wildcard_name
+%type <integer> phdr_type
+%type <phdr_info> phdr_info
 %type <versyms> vers_defns
 %type <versnode> vers_tag
 %type <deplist> verdep
@@ -226,12 +232,17 @@ linker_script:
 
 /* A command which may appear at top level of a linker script.  */
 file_cmd:
-         GROUP
+         FORCE_COMMON_ALLOCATION
+           { script_set_common_allocation(closure, 1); }
+       | GROUP
            { script_start_group(closure); }
          '(' input_list ')'
            { script_end_group(closure); }
+       | INHIBIT_COMMON_ALLOCATION
+           { script_set_common_allocation(closure, 0); }
         | OPTION '(' string ')'
            { script_parse_option(closure, $3.value, $3.length); }
+       | PHDRS '{' phdrs_defs '}'
        | SEARCH_DIR '(' string ')'
            { script_add_search_dir(closure, $3.value, $3.length); }
        | SECTIONS '{'
@@ -365,6 +376,7 @@ section_trailer:
          opt_memspec opt_at_memspec opt_phdr opt_fill opt_comma
            {
              $$.fill = $4;
+             $$.phdrs = $3;
            }
        ;
 
@@ -385,8 +397,9 @@ opt_at_memspec:
 /* The program segment an output section should go into.  */
 opt_phdr:
          opt_phdr ':' string
-           { yyerror(closure, "program headers are not supported"); }
+           { $$ = script_string_list_push_back($1, $3.value, $3.length); }
        | /* empty */
+           { $$ = NULL; }
        ;
 
 /* The value to use to fill an output section.  FIXME: This does not
@@ -587,6 +600,64 @@ file_or_sections_cmd:
            { script_add_assertion(closure, $3, $5.value, $5.length); }
        ;
 
+/* A list of program header definitions.  */
+phdrs_defs:
+         phdrs_defs phdr_def
+       | /* empty */
+       ;
+
+/* A program header definition.  */
+phdr_def:
+         string phdr_type phdr_info ';'
+           { script_add_phdr(closure, $1.value, $1.length, $2, &$3); }
+       ;
+
+/* A program header type.  The GNU linker accepts a general expression
+   here, but that would be a pain because we would have to dig into
+   the expression structure.  It's unlikely that anybody uses anything
+   other than a string or a number here, so that is all we expect.  */
+phdr_type:
+         string
+           { $$ = script_phdr_string_to_type(closure, $1.value, $1.length); }
+       | INTEGER
+           { $$ = $1; }
+       ;
+
+/* Additional information for a program header.  */
+phdr_info:
+         /* empty */
+           { memset(&$$, 0, sizeof(struct Phdr_info)); }
+       | string phdr_info
+           {
+             $$ = $2;
+             if ($1.length == 7 && strncmp($1.value, "FILEHDR", 7) == 0)
+               $$.includes_filehdr = 1;
+             else
+               yyerror(closure, "PHDRS syntax error");
+           }
+       | PHDRS phdr_info
+           {
+             $$ = $2;
+             $$.includes_phdrs = 1;
+           }
+       | string '(' INTEGER ')' phdr_info
+           {
+             $$ = $5;
+             if ($1.length == 5 && strncmp($1.value, "FLAGS", 5) == 0)
+               {
+                 $$.is_flags_valid = 1;
+                 $$.flags = $3;
+               }
+             else
+               yyerror(closure, "PHDRS syntax error");
+           }
+       | AT '(' parse_exp ')' phdr_info
+           {
+             $$ = $5;
+             $$.load_address = $3;
+           }
+       ;
+
 /* Set a symbol to a value.  */
 assignment:
          string '=' parse_exp