da792b3fd0
read when the -t or -C switch is encountered and parts of it are processed. The remaining parts are processed when all object files and libraries have been read. To make this work, the expression evaluation in cfgexpr has been rewritten to generate true expression trees. This means that expressions in the linker config may use exports from the object files. Separation of config file processing is the base for several enhancements, for example forced imports by linker config. This code needs more work and is only very, very, very roughly tested. git-svn-id: svn://svn.cc65.org/cc65/trunk@4840 b7a2c559-68d2-44c3-8de9-860c34a00d81
146 lines
6.5 KiB
C
146 lines
6.5 KiB
C
/*****************************************************************************/
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/* */
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/* exprdefs.h */
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/* */
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/* Expression tree definitions */
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/* */
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/* */
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/* */
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/* (C) 1998-2010, Ullrich von Bassewitz */
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/* Roemerstrasse 52 */
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/* D-70794 Filderstadt */
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/* EMail: uz@cc65.org */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#ifndef EXPRDEFS_H
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#define EXPRDEFS_H
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/*****************************************************************************/
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/* Data */
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/*****************************************************************************/
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/* Expression type masks */
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#define EXPR_TYPEMASK 0xC0
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#define EXPR_BINARYNODE 0x00
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#define EXPR_UNARYNODE 0x40
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#define EXPR_LEAFNODE 0x80
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/* Type of expression nodes */
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#define EXPR_NULL 0x00 /* Internal error or NULL node */
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/* Leaf node codes */
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#define EXPR_LITERAL (EXPR_LEAFNODE | 0x01)
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#define EXPR_SYMBOL (EXPR_LEAFNODE | 0x02)
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#define EXPR_SECTION (EXPR_LEAFNODE | 0x03)
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#define EXPR_SEGMENT (EXPR_LEAFNODE | 0x04) /* Linker only */
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#define EXPR_MEMAREA (EXPR_LEAFNODE | 0x05) /* Linker only */
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#define EXPR_ULABEL (EXPR_LEAFNODE | 0x06) /* Assembler only */
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/* Binary operations, left and right hand sides are valid */
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#define EXPR_PLUS (EXPR_BINARYNODE | 0x01)
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#define EXPR_MINUS (EXPR_BINARYNODE | 0x02)
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#define EXPR_MUL (EXPR_BINARYNODE | 0x03)
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#define EXPR_DIV (EXPR_BINARYNODE | 0x04)
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#define EXPR_MOD (EXPR_BINARYNODE | 0x05)
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#define EXPR_OR (EXPR_BINARYNODE | 0x06)
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#define EXPR_XOR (EXPR_BINARYNODE | 0x07)
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#define EXPR_AND (EXPR_BINARYNODE | 0x08)
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#define EXPR_SHL (EXPR_BINARYNODE | 0x09)
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#define EXPR_SHR (EXPR_BINARYNODE | 0x0A)
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#define EXPR_EQ (EXPR_BINARYNODE | 0x0B)
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#define EXPR_NE (EXPR_BINARYNODE | 0x0C)
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#define EXPR_LT (EXPR_BINARYNODE | 0x0D)
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#define EXPR_GT (EXPR_BINARYNODE | 0x0E)
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#define EXPR_LE (EXPR_BINARYNODE | 0x0F)
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#define EXPR_GE (EXPR_BINARYNODE | 0x10)
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#define EXPR_BOOLAND (EXPR_BINARYNODE | 0x11)
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#define EXPR_BOOLOR (EXPR_BINARYNODE | 0x12)
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#define EXPR_BOOLXOR (EXPR_BINARYNODE | 0x13)
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#define EXPR_MAX (EXPR_BINARYNODE | 0x14)
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#define EXPR_MIN (EXPR_BINARYNODE | 0x15)
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/* Unary operations, right hand side is empty */
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#define EXPR_UNARY_MINUS (EXPR_UNARYNODE | 0x01)
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#define EXPR_NOT (EXPR_UNARYNODE | 0x02)
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#define EXPR_SWAP (EXPR_UNARYNODE | 0x03)
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#define EXPR_BOOLNOT (EXPR_UNARYNODE | 0x04)
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#define EXPR_BYTE0 (EXPR_UNARYNODE | 0x08)
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#define EXPR_BYTE1 (EXPR_UNARYNODE | 0x09)
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#define EXPR_BYTE2 (EXPR_UNARYNODE | 0x0A)
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#define EXPR_BYTE3 (EXPR_UNARYNODE | 0x0B)
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#define EXPR_WORD0 (EXPR_UNARYNODE | 0x0C)
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#define EXPR_WORD1 (EXPR_UNARYNODE | 0x0D)
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/* The expression node itself */
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typedef struct ExprNode ExprNode;
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struct ExprNode {
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unsigned char Op; /* Operand/Type */
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ExprNode* Left; /* Left leaf */
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ExprNode* Right; /* Right leaf */
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struct ObjData* Obj; /* Object file reference (linker) */
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union {
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long IVal; /* If this is a int value */
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struct SymEntry* Sym; /* If this is a symbol */
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unsigned SegNum; /* If this is a segment */
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struct Import* Imp; /* If this is an import */
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struct MemoryArea* Mem; /* If this is a memory area */
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struct Segment* Seg; /* If this is a segment */
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struct Section* Sec; /* If section and Obj is NULL */
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} V;
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};
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/* Macros to determine the expression type */
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#define EXPR_IS_LEAF(Op) (((Op) & EXPR_TYPEMASK) == EXPR_LEAFNODE)
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#define EXPR_IS_UNARY(Op) (((Op) & EXPR_TYPEMASK) == EXPR_UNARYNODE)
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#define EXPR_IS_BINARY(OP) (((Op) & EXPR_TYPEMASK) == EXPR_BINARYNODE)
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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void DumpExpr (const ExprNode* Expr, const ExprNode* (*ResolveSym) (const struct SymEntry*));
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/* Dump an expression tree to stdout */
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/* End of exprdefs.h */
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#endif
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