/*
* $Id: lc_eval.h,v 1.1 2008/08/04 17:03:13 lachlan.longdrop.melbourne.sgi.com Exp $
*
* This file is part of lcrash, an analysis tool for Linux memory dumps.
*
* Created by Silicon Graphics, Inc.
* Contributions by IBM, and others
*
* Copyright (C) 1999 - 2002 Silicon Graphics, Inc. All rights reserved.
* Copyright (C) 2001, 2002 IBM Deutschland Entwicklung GmbH, IBM Corporation
*
* This program 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 of the License, or
* (at your option) any later version. See the file COPYING for more
* information.
*/
#ifndef __LC_EVAL_H
#define __LC_EVAL_H
typedef struct type_s {
int flag;
union {
struct type_s *next;
kltype_t *kltp;
} un;
} type_t;
#define t_next un.next
#define t_kltp un.kltp
/* Structure to hold info on "tokens" extracted from eval and print
* command input strings.
*/
typedef struct token_s {
short type;
short operator; /* if token is an operator */
char *string; /* string holding value or identifier */
char *ptr; /* pointer to start of token */
struct token_s *next; /* next token in the chain */
} token_t;
/* Structure returned by the eval() function containing the result
* of an expression evaluation. This struct is also used to build the
* parse tree for the expression.
*/
typedef struct node_s {
struct node_s *next; /* linked list pointer */
unsigned char node_type; /* type of node */
unsigned short flags; /* see below */
unsigned char operator; /* operator if node is type OPERATOR */
unsigned char byte_size; /* byte_size of base_type values */
char *name; /* name of variable or struct member */
/* value and address are uint64_t in lcrash, but for ia32 ... */
unsigned long long value; /* numeric value or pointer */
unsigned long address; /* address (could be same as pointer) */
type_t *type; /* pointer to type related info */
char *tok_ptr; /* pointer to token in cmd string */
struct node_s *left; /* pointer to left child */
struct node_s *right; /* pointer to right child */
} node_t;
/* Token and Node types
*/
#define OPERATOR 1
#define NUMBER 2
#define INDEX 3
#define TYPE_DEF 4
#define VADDR 5
#define MEMBER 6
#define STRING 7
#define TEXT 8
#define CHARACTER 9
#define EVAL_VAR 10
/* Flag values
*/
#define STRING_FLAG 0x001
#define ADDRESS_FLAG 0x002
#define INDIRECTION_FLAG 0x004
#define POINTER_FLAG 0x008
#define MEMBER_FLAG 0x010
#define BOOLIAN_FLAG 0x020
#define KLTYPE_FLAG 0x040
#define NOTYPE_FLAG 0x080
#define UNSIGNED_FLAG 0x100
#define VOID_FLAG 0x200
/* Flag value for print_eval_error() function
*/
#define CMD_NAME_FLG 1 /* cmdname is not name of a command */
#define CMD_STRING_FLG 2 /* cmdname is not name of a command */
/* Expression operators in order of precedence.
*/
#define CONDITIONAL 1
#define CONDITIONAL_ELSE 2
#define LOGICAL_OR 3
#define LOGICAL_AND 4
#define BITWISE_OR 5
#define BITWISE_EXCLUSIVE_OR 6
#define BITWISE_AND 7
#define EQUAL 8
#define NOT_EQUAL 9
#define LESS_THAN 10
#define GREATER_THAN 11
#define LESS_THAN_OR_EQUAL 12
#define GREATER_THAN_OR_EQUAL 13
#define RIGHT_SHIFT 14
#define LEFT_SHIFT 15
#define ADD 16
#define SUBTRACT 17
#define MULTIPLY 18
#define DIVIDE 19
#define MODULUS 20
#define LOGICAL_NEGATION 21
#define ONES_COMPLEMENT 22
#define PREFIX_INCREMENT 23
#define PREFIX_DECREMENT 24
#define POSTFIX_INCREMENT 25
#define POSTFIX_DECREMENT 26
#define CAST 27
#define UNARY_MINUS 28
#define UNARY_PLUS 29
#define INDIRECTION 30
#define ADDRESS 31
#define SIZEOF 32
#define RIGHT_ARROW 33
#define DOT 34
#define OPEN_PAREN 100
#define CLOSE_PAREN 101
#define OPEN_SQUARE_BRACKET 102
#define CLOSE_SQUARE_BRACKET 103
#define SEMI_COLON 104
#define NOT_YET -1
/* Errors codes primarily for use with eval (print) functions
*/
#define E_OPEN_PAREN 1100
#define E_CLOSE_PAREN 1101
#define E_BAD_STRUCTURE 1102
#define E_MISSING_STRUCTURE 1103
#define E_BAD_MEMBER 1104
#define E_BAD_OPERATOR 1105
#define E_BAD_OPERAND 1106
#define E_MISSING_OPERAND 1107
#define E_BAD_TYPE 1108
#define E_NOTYPE 1109
#define E_BAD_POINTER 1110
#define E_BAD_INDEX 1111
#define E_BAD_CHAR 1112
#define E_BAD_STRING 1113
#define E_END_EXPECTED 1114
#define E_BAD_EVAR 1115 /* Bad eval variable */
#define E_BAD_VALUE 1116
#define E_NO_VALUE 1117
#define E_DIVIDE_BY_ZERO 1118
#define E_BAD_CAST 1119
#define E_NO_ADDRESS 1120
#define E_SINGLE_QUOTE 1121
#define E_BAD_WHATIS 1197
#define E_NOT_IMPLEMENTED 1198
#define E_SYNTAX_ERROR 1199
extern uint64_t eval_error;
extern char *error_token;
/* Function prototypes
*/
node_t *eval(char **, int);
void print_eval_error(char *, char *, char *, uint64_t, int);
void free_nodes(node_t *);
/* Struct to hold information about eval variables
*/
typedef struct variable_s {
btnode_t v_bt; /* Must be first */
int v_flags;
char *v_exp; /* What was entered on command line */
char *v_typestr; /* Actual type string after eval() call */
node_t *v_node;
} variable_t;
#define v_left v_bt.bt_left
#define v_right v_bt.bt_right
#define v_name v_bt.bt_key
/* Flag values
*/
#define V_PERM 0x001 /* can't be unset - can be modified */
#define V_DEFAULT 0x002 /* set at startup */
#define V_NOMOD 0x004 /* cannot be modified */
#define V_TYPEDEF 0x008 /* contains typed data */
#define V_REC_STRUCT 0x010 /* direct ref to struct/member (not pointer) */
#define V_STRING 0x020 /* contains ASCII string (no type) */
#define V_COMMAND 0x040 /* contains command string (no type) */
#define V_OPTION 0x080 /* contains option flag (e.g., $hexints) */
#define V_PERM_NODE 0x100 /* Don't free node after setting variable */
/* Variable table struct
*/
typedef struct vtab_s {
variable_t *vt_root;
int vt_count;
} vtab_t;
extern vtab_t *vtab; /* Pointer to table of eval variable info */
/* Function Prototypes
*/
variable_t *make_variable(char *, char *, node_t *, int);
void clean_variable(variable_t *);
void free_variable(variable_t *);
void init_variables(vtab_t *);
int set_variable(vtab_t *, char *, char *, node_t *, int);
int unset_variable(vtab_t *, variable_t *);
variable_t *find_variable(vtab_t *, char *, int);
kltype_t *number_to_type(node_t *);
void free_eval_memory(void);
/* cpw: was int print_eval_results(node_t *, FILE *, int); */
int print_eval_results(node_t *, int);
#endif /* __LC_EVAL_H */
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