/* expr.h -> header file for expr.c
- Copyright 1987, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
- Free Software Foundation, Inc.
+ Copyright (C) 1987-2019 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
GAS 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)
+ the Free Software Foundation; either version 3, or (at your option)
any later version.
GAS is distributed in the hope that it will be useful,
You should have received a copy of the GNU General Public License
along with GAS; see the file COPYING. If not, write to the Free
- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA. */
+ Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
+ 02110-1301, USA. */
/*
* By popular demand, we define a struct to represent an expression.
O_multiply,
/* (X_add_symbol / X_op_symbol) + X_add_number. */
O_divide,
- /* X_add_symbol % X_op_symbol) + X_add_number. */
+ /* (X_add_symbol % X_op_symbol) + X_add_number. */
O_modulus,
- /* X_add_symbol << X_op_symbol) + X_add_number. */
+ /* (X_add_symbol << X_op_symbol) + X_add_number. */
O_left_shift,
- /* X_add_symbol >> X_op_symbol) + X_add_number. */
+ /* (X_add_symbol >> X_op_symbol) + X_add_number. */
O_right_shift,
- /* X_add_symbol | X_op_symbol) + X_add_number. */
+ /* (X_add_symbol | X_op_symbol) + X_add_number. */
O_bit_inclusive_or,
- /* X_add_symbol |~ X_op_symbol) + X_add_number. */
+ /* (X_add_symbol |~ X_op_symbol) + X_add_number. */
O_bit_or_not,
- /* X_add_symbol ^ X_op_symbol) + X_add_number. */
+ /* (X_add_symbol ^ X_op_symbol) + X_add_number. */
O_bit_exclusive_or,
- /* X_add_symbol & X_op_symbol) + X_add_number. */
+ /* (X_add_symbol & X_op_symbol) + X_add_number. */
O_bit_and,
- /* X_add_symbol + X_op_symbol) + X_add_number. */
+ /* (X_add_symbol + X_op_symbol) + X_add_number. */
O_add,
- /* X_add_symbol - X_op_symbol) + X_add_number. */
+ /* (X_add_symbol - X_op_symbol) + X_add_number. */
O_subtract,
/* (X_add_symbol == X_op_symbol) + X_add_number. */
O_eq,
when performing arithmetic on these values).
FIXME: This field is not set very reliably. */
unsigned int X_unsigned : 1;
+ /* This is used to implement "word size + 1 bit" arithmetic, so that e.g.
+ expressions used with .sleb128 directives can use the full range available
+ for an unsigned word, but can also properly represent all values of a
+ signed word. */
+ unsigned int X_extrabit : 1;
/* 7 additional bits can be defined if needed. */
unsigned short X_md;
} expressionS;
+enum expr_mode
+{
+ expr_evaluate,
+ expr_normal,
+ expr_defer
+};
+
/* "result" should be type (expressionS *). */
-#define expression(result) expr (0, result)
+#define expression(result) expr (0, result, expr_normal)
+#define expression_and_evaluate(result) expr (0, result, expr_evaluate)
+#define deferred_expression(result) expr (0, result, expr_defer)
/* If an expression is O_big, look here for its value. These common
data may be clobbered whenever expr() is called. */
typedef char operator_rankT;
-extern char get_symbol_end PARAMS ((void));
-extern void expr_begin PARAMS ((void));
-extern void expr_set_precedence PARAMS ((void));
-extern segT expr PARAMS ((int rank, expressionS * resultP));
-extern unsigned int get_single_number PARAMS ((void));
-extern symbolS *make_expr_symbol PARAMS ((expressionS * expressionP));
-extern int expr_symbol_where
- PARAMS ((symbolS *, char **, unsigned int *));
-
-extern symbolS *expr_build_uconstant PARAMS ((offsetT));
-extern symbolS *expr_build_unary PARAMS ((operatorT, symbolS *));
-extern symbolS *expr_build_binary PARAMS ((operatorT, symbolS *, symbolS *));
-extern symbolS *expr_build_dot PARAMS ((void));
+extern char get_symbol_name (char **);
+extern char restore_line_pointer (char);
+extern void expr_begin (void);
+extern void expr_set_precedence (void);
+extern void expr_set_rank (operatorT, operator_rankT);
+extern void add_to_result (expressionS *, offsetT, int);
+extern void subtract_from_result (expressionS *, offsetT, int);
+extern segT expr (int, expressionS *, enum expr_mode);
+extern unsigned int get_single_number (void);
+extern symbolS *make_expr_symbol (expressionS * expressionP);
+extern int expr_symbol_where (symbolS *, const char **, unsigned int *);
+extern void current_location (expressionS *);
+
+extern symbolS *expr_build_uconstant (offsetT);
+extern symbolS *expr_build_dot (void);
+
+int resolve_expression (expressionS *);
+
+extern bfd_boolean literal_prefix_dollar_hex;