Support assignments and expressions in linker scripts.

gold/script-c.h

@@ -1,6 +1,6 @@
 /* script-c.h -- C interface for linker scripts in gold.  */
 
-/* Copyright 2006, 2007 Free Software Foundation, Inc.
+/* Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
    Written by Ian Lance Taylor <iant@google.com>.
 
    This file is part of gold.
@@ -30,6 +30,31 @@
 extern "C" {
 #endif
 
+/* A string value for the bison parser.  */
+
+struct Parser_string
+{
+  const char* value;
+  size_t length;
+};
+
+/* The expression functions deal with pointers to Expression objects.
+   Since the bison parser generates C code, this is a hack to keep the
+   C++ code type safe.  This hacks assumes that all pointers look
+   alike.  */
+
+#ifdef __cplusplus
+namespace gold
+{
+class Expression;
+}
+typedef gold::Expression* Expression_ptr;
+#else
+typedef void* Expression_ptr;
+#endif
+
+/* The bison parser definitions.  */
+
 #include "yyscript.h"
 
 /* The bison parser function.  */
@@ -50,7 +75,7 @@ yyerror(void* closure, const char*);
 /* Called by the bison parser to add a file to the link.  */
 
 extern void
-script_add_file(void* closure, const char*);
+script_add_file(void* closure, const char*, size_t);
 
 /* Called by the bison parser to start and stop a group.  */
 
@@ -69,11 +94,119 @@ script_end_as_needed(void* closure);
 /* Called by the bison parser to set the entry symbol.  */
 
 extern void
-script_set_entry(void* closure, const char*);
+script_set_entry(void* closure, const char*, size_t);
 
 /* Called by the bison parser to parse an OPTION.  */
+
 extern void
-script_parse_option(void* closure, const char*);
+script_parse_option(void* closure, const char*, size_t);
+
+/* Called by the bison parser to push the lexer into expression
+   mode.  */
+
+extern void
+script_push_lex_into_expression_mode(void* closure);
+
+/* Called by the bison parser to pop the lexer mode.  */
+
+extern void
+script_pop_lex_mode(void* closure);
+
+/* Called by the bison parser to set a symbol to a value.  PROVIDE is
+   non-zero if the symbol should be provided--only defined if there is
+   an undefined reference.  HIDDEN is non-zero if the symbol should be
+   hidden.  */
+
+extern void
+script_set_symbol(void* closure, const char*, size_t, Expression_ptr,
+		  int provide, int hidden);
+
+/* Called by the bison parser for expressions.  */
+
+extern Expression_ptr
+script_exp_unary_minus(Expression_ptr);
+extern Expression_ptr
+script_exp_unary_logical_not(Expression_ptr);
+extern Expression_ptr
+script_exp_unary_bitwise_not(Expression_ptr);
+extern Expression_ptr
+script_exp_binary_mult(Expression_ptr, Expression_ptr);
+extern Expression_ptr
+script_exp_binary_div(Expression_ptr, Expression_ptr);
+extern Expression_ptr
+script_exp_binary_mod(Expression_ptr, Expression_ptr);
+extern Expression_ptr
+script_exp_binary_add(Expression_ptr, Expression_ptr);
+extern Expression_ptr
+script_exp_binary_sub(Expression_ptr, Expression_ptr);
+extern Expression_ptr
+script_exp_binary_lshift(Expression_ptr, Expression_ptr);
+extern Expression_ptr
+script_exp_binary_rshift(Expression_ptr, Expression_ptr);
+extern Expression_ptr
+script_exp_binary_eq(Expression_ptr, Expression_ptr);
+extern Expression_ptr
+script_exp_binary_ne(Expression_ptr, Expression_ptr);
+extern Expression_ptr
+script_exp_binary_le(Expression_ptr, Expression_ptr);
+extern Expression_ptr
+script_exp_binary_ge(Expression_ptr, Expression_ptr);
+extern Expression_ptr
+script_exp_binary_lt(Expression_ptr, Expression_ptr);
+extern Expression_ptr
+script_exp_binary_gt(Expression_ptr, Expression_ptr);
+extern Expression_ptr
+script_exp_binary_bitwise_and(Expression_ptr, Expression_ptr);
+extern Expression_ptr
+script_exp_binary_bitwise_xor(Expression_ptr, Expression_ptr);
+extern Expression_ptr
+script_exp_binary_bitwise_or(Expression_ptr, Expression_ptr);
+extern Expression_ptr
+script_exp_binary_logical_and(Expression_ptr, Expression_ptr);
+extern Expression_ptr
+script_exp_binary_logical_or(Expression_ptr, Expression_ptr);
+extern Expression_ptr
+script_exp_trinary_cond(Expression_ptr, Expression_ptr, Expression_ptr);
+extern Expression_ptr
+script_exp_integer(uint64_t);
+extern Expression_ptr
+script_exp_string(const char*, size_t);
+extern Expression_ptr
+script_exp_function_max(Expression_ptr, Expression_ptr);
+extern Expression_ptr
+script_exp_function_min(Expression_ptr, Expression_ptr);
+extern Expression_ptr
+script_exp_function_defined(const char*, size_t);
+extern Expression_ptr
+script_exp_function_sizeof_headers();
+extern Expression_ptr
+script_exp_function_alignof(const char*, size_t);
+extern Expression_ptr
+script_exp_function_sizeof(const char*, size_t);
+extern Expression_ptr
+script_exp_function_addr(const char*, size_t);
+extern Expression_ptr
+script_exp_function_loadaddr(const char*, size_t);
+extern Expression_ptr
+script_exp_function_origin(const char*, size_t);
+extern Expression_ptr
+script_exp_function_length(const char*, size_t);
+extern Expression_ptr
+script_exp_function_constant(const char*, size_t);
+extern Expression_ptr
+script_exp_function_absolute(Expression_ptr);
+extern Expression_ptr
+script_exp_function_align(Expression_ptr, Expression_ptr);
+extern Expression_ptr
+script_exp_function_data_segment_align(Expression_ptr, Expression_ptr);
+extern Expression_ptr
+script_exp_function_data_segment_relro_end(Expression_ptr, Expression_ptr);
+extern Expression_ptr
+script_exp_function_data_segment_end(Expression_ptr);
+extern Expression_ptr
+script_exp_function_segment_start(const char*, size_t, Expression_ptr);
+extern Expression_ptr
+script_exp_function_assert(Expression_ptr, const char*, size_t);
 
 #ifdef __cplusplus
 }