487 lines
20 KiB
C
487 lines
20 KiB
C
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/******************************************************************************
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*
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* INFO/BASIC de-compiler main include file
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*
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* Module %M% Version %I% Date %H%
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*
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* (c) Copyright 1998 Ardent Software Inc. - All Rights Reserved
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* This is unpublished proprietary source code of Ardent Software Inc.
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* The copyright notice above does not evidence any actual or intended
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* publication of such source code.
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*
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*******************************************************************************
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*
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* Maintenence log - insert most recent change descriptions at top
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*
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* Date.... GTAR# WHO Description.........................................
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* 10/14/98 23801 SAP Change copyrights.
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* 07/14/94 14444 NDP Removed __MODULE__ and __SCCSID__ definitions.
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* 06/23/94 14421 PGW Initial implementation
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*
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******************************************************************************/
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/*
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* This is the header file for the INFO/BASIC de-compiler, defining the
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* major data structures, global variables, and procedure declarations.
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*/
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/***********************************************************************
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*
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* Macros and constants
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*
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***********************************************************************/
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/*
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* The following 'proto' macro allows the defining of function prototypes
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* such that the code still compiles for non-prototype supporting compilers.
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* Example usage of the macro for printf is:
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* void printf proto((char *, ...));
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* Note: The usage of the double parenthesis is necessary!
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*/
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#ifdef __STDC__
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#define proto(args) args /* for prototypers */
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#else
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#define proto(args) () /* for non-prototypers */
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#endif
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#define TEXT_MARK '\373'
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#define SUBVALUE_MARK '\374'
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#define VALUE_MARK '\375'
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#define FIELD_MARK '\376'
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#define ITEM_MARK '\377'
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/* Real_Char is a macro to convert a PRIMOS char (found in
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object files) to a printable ASCII char. */
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#define Real_Char(x) (((char)(x)) ^ 0x80)
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/* Limits */
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#define MAXSTRING 258 /* Maximum size of a string literal */
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#define MAXNAME 1024 /* Maximum length of a file name */
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/* Is there an ANSI form? */
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#define MAX_OBJECT_SIZE 65536 /* Maximum size of object code */
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#define MAXSOURCE 2048 /* Maximum source line length */
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#define MAX_OPCODE_ARGS 8 /* Maximum stack args to opcode */
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#define MAX_DATE_STRING 64 /* Maximum length of date string */
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#define MAX_COMMONS 256 /* Maximum number of COMMON areas */
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#define MAX_INTEGER_TEXT 20 /* Max length of integer constant */
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#define MAX_CALL_ARGS 256 /* Maximum args to CALL */
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#define OP_STORE_OPCODE 5 /* Value of STORE opcode */
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#define OP_RETURN_OPCODE 10 /* Value of RETURN opcode */
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#define OP_BRLFALS_OPCODE 39 /* Value of BRLFALS opcode */
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#define OP_BRLTRUE_OPCODE 48 /* Value of BRLTRUE opcode */
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#define OP_LDVAR_OPCODE 94 /* Value of LDVAR opcode */
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#define OP_EXTENDED_OPCODE 95 /* prefix byte for extended opcodes */
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#define OP_LOCATE_OPCODE 7 /* Value of LOCATE opcode (after 95) */
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#define OP_CONSTANT_BASE 99 /* value for "Load constant zero" */
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#define OP_LDVAR_LIMIT 128 /* Start of "load variable" opcodes */
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#define OP_45_LIMIT 11 /* Maximum OP45 extension */
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#define OP_95_LIMIT 178 /* Maximum OP95 extension */
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#define QUOTE_CHAR '"' /* Used for string constants */
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/* This is the value for the sign bit in a 3-byte signed number */
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#define ADDRESS_SIGN_VALUE 0x800000
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/* This is the value for the sign bit in a 4-byte signed number */
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#define LONG_SIGN_VALUE 0x80000000
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/* Fields in the variable header data */
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#define VAR_HDR_PATH 0
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#define VAR_HDR_PI_REV 1
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#define VAR_HDR_IB_REV 2
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#define VAR_HDR_USER 3
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#define VAR_HDR_DATETIME 4
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#define VAR_HDR_COPYRIGHT 5
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#define VAR_HDR_SERIAL 6
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#define VAR_HDR_COMMENTS 7
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/* Number of fields to be extracted */
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#define VAR_HDR_FIELDS 8
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/* Bits in the options word of the INFO/BASIC header */
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/* (extracted from ib_options.h in the PI/open source) */
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#define BRIEF_OPTION 0x00000001
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#define CASE_OPTION 0x00000002
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#define DEBUGGING_OPTION 0x00000004
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#define DETAIL_OPTION 0x00000008
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#define INTERNAL_DEBUGGING_OPTION 0x00000010
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#define ITYPE_OPTION 0x00000020
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#define IXREF_OPTION 0x00000040
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#define LISTING_OPTION 0x00000080
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#define OBJECT_OPTION 0x00000100
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#define OPTIMIZE_OPTION 0x00000200
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#define PRIME_OPTION 0x00000400
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/* Option bit with value 0x00000800 not used */
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#define IB_REALITY_OPTION 0x00001000
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#define IB_SMA_OPTION 0x00002000
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#define VERSION_OPTION 0x00004000
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#define XREF_OPTION 0x00008000
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#define NO_WARNINGS_OPTION 0x00010000
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#define MONITOR_OPTION 0x00020000
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#define CMAN_OPTION 0x00040000
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#define SMA_COMMON_OPTION 0x00080000
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#define IB_RAW_INPUT_OPTION 0x00100000
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#define IB_RAW_OUTPUT_OPTION 0x00200000
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#define IB_SMA_SEQ_OPTION 0x00400000
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#define IB_SMA_FOR_NEXT_OPTION 0x00800000
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#define IB_SMA_READ_ELSE_OPTION 0x01000000
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#define IB_SMA_HEADING_OPTION 0x02000000
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/* Options bits for INPUT opcodes */
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/* The first three are used by both INPUTOP and INPUTAT */
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#define INPUT_UNDERSCORE_OPTION 1
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#define INPUT_COLON_OPTION 2
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#define INPUT_PRIME_OPTION 4
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/* This one is only used by INPUTOP */
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#define INPUT_KEYIN_OPTION 8
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/* These are only used by INPUTAT */
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#define INPUT_DISPLAY_OPTION 8
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#define INPUT_FORMAT_OPTION 16
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#define INPUT_ELSE_OPTION 32
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#define INPUT_THEN_OPTION 64
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/***********************************************************************
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* Status codes
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***********************************************************************/
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#define DC_INVALID_OPCODE 1001 /* Invalid opcode */
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#define DC_UNSUPPORTED_OPCODE 1002 /* Unsupported opcode */
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#define DC_INVALID_INDXARY 1003 /* INDXARY without array name */
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#define DC_DIMCOM_ERROR 1004 /* DIMCOM: missing variable */
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#define DC_BRLNERR 1005 /* Unexpected BRLNERR */
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#define DC_MISSING_TARGET 1006 /* No target for branch */
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#define DC_MEMORY 1007 /* Out of memory */
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#define DC_DIMLCL_ERROR 1008 /* DIMLCL: missing variable */
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#define DC_READL_ERROR 1009 /* READL: missing lock type */
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#define DC_RSTACK_UNDERFLOW 1010 /* rstack exhausted */
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#define DC_INVALID_COMMON 1011 /* Invalid COMMON reference */
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#define DC_INVALID_RSTACK 1012 /* Invalid rstack entry */
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#define DC_INVALID_SELIND 1013 /* SELECTINDEX: invalid type */
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#define DC_READNX2_ERROR 1014 /* READNX2: invalid arg count */
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#define DC_INVALID_INPUTOP 1015 /* INPUTOP: invalid options */
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#define DC_INVALID_INPUTAT 1016 /* INPUTAT: invalid options */
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#define DC_INVALID_DEVSYS 1017 /* Invalid DEVSYS reference */
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#define DC_INVALID_ONERR 1018 /* ONERR/store with arg not 0 */
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#define DC_ERROR_IFEXPR 1019 /* IF-expr with no text */
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#define DC_DUPLICATE 1020 /* Unexpected DUP */
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#define DC_MISSING_STORE 1021 /* Expected STORE missing */
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#define DC_DEVSYS_FORBIDDEN 1022 /* COMMON /DEVSYS/ not allowed */
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#define DC_STORE_STACK 1023 /* STORE left entry on stack */
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#define DC_STMT_STACK 1024 /* Statement left entry on stack */
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#define DC_MISSING_LDVAR 1025 /* Expected LDVAR missing */
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#define DC_INVALID_SMA 1026 /* Invalid use of SMA opcode */
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#define DC_DIMICOM_ERROR 1027 /* DIMICOM: argument error */
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#define DC_MISSING_SUBR 1028 /* CALL: no subroutine reference */
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#define DC_RESOLVE_ERROR 1029 /* pop_stack_and_resolve error */
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/* Command line errors */
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#define DC_OPT_NOFILE 2001 /* No input file given */
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#define DC_OPT_UNKNOWN 2002 /* Unknown option */
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#define DC_OPT_INVALID 2003 /* Invalid option */
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#define DC_OPT_SYNTAX 2004 /* Too many non-hyphen words */
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#define DC_OPT_ARGKEY 2005 /* Invalid argument key */
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/***********************************************************************
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*
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* Typedefs and structures
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*
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***********************************************************************/
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/* The p_file structure is used to read through the object file,
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keeping track of the current byte value and byte position.
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Procedures to manipulate it are found in pfile.c */
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struct p_file {
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FILE *pf;
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int byte;
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long count;
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};
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extern struct p_file p1; /* program object (IRUN) file */
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/* The ib_header_data structure holds data obtained from the object
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file header. */
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struct ib_header_data {
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int version;
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int program_type;
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long object_size;
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long obj_header_size;
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unsigned long options_word;
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char * var_hdr_data[VAR_HDR_FIELDS];
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unsigned int nargs;
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unsigned int nvars;
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unsigned int symof;
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unsigned int linof;
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};
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extern struct ib_header_data header_data;
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/* Information about each COMMON area defined in a program is held
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* in a COMMON_TYPE structure. This is of variable size, since
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* it holds information about each variable within the common area.
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*/
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typedef struct pi_common_elt_str PI_COMMON_ELEMENT;
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struct pi_common_elt_str {
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int dims; /* Number of dimensions */
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char * rows; /* Number of rows; NULL = scalar */
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char * cols; /* Number of columns; NULL = 1-dim */
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};
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typedef struct sma_common_elt_str SMA_COMMON_ELEMENT;
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struct sma_common_elt_str {
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unsigned int var_no; /* Local variable referencing this array */
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unsigned int rows; /* Number of rows */
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unsigned int cols; /* Number of columns; 0 = 1-dim */
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};
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typedef struct common_element_str COMMON_ELEMENT;
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struct common_element_str {
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char * name; /* Variable name */
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int type; /* 1 = SMA-style array */
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union {
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PI_COMMON_ELEMENT pi;
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SMA_COMMON_ELEMENT sma;
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} data;
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};
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typedef struct common_str COMMON_TYPE, *COMMON_PTR;
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struct common_str {
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unsigned int var_no; /* Variable number in this program */
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char name[10]; /* COMMON area name */
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unsigned int size; /* Size (number of elements) */
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COMMON_ELEMENT elt[1]; /* Data for each element */
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};
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extern COMMON_PTR common_list[];
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/* In order to de-compile expressions, the program keeps a symbolic
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* stack which parallels the run-time stack movements that occur when
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* a program is executed. Each element of the stack is not a value,
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* but holds information about the sub-expression that it corresponds to.
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* In most cases, this is the text of the sub-expressions, plus a
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* priority used to determine whether parentheses are needed.
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* These are operator precedence values: higher number means a lower
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* priority operator.
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*/
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/* Rstack entry types */
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#define RS_NONE 0 /* Not complete yet */
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#define RS_TEXT 1 /* Sub-expression text */
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#define RS_LOCAL 2 /* Local variable reference */
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#define RS_COMMON 3 /* COMMON variable reference */
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#define RS_INTEGER 4 /* Integer constant */
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#define RS_SUBROUTINE 5 /* Subroutine link (DSUBR) */
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/* Text entry */
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typedef struct rstack_text_str RSTACK_TEXT_TYPE;
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struct rstack_text_str {
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int priority; /* operator precedence of this entry */
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char * text; /* expression text */
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};
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/* Local variable entry */
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typedef struct rstack_local_str RSTACK_LOCAL_TYPE;
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struct rstack_local_str {
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unsigned int var_no; /* variable number */
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};
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/* COMMON variable entry */
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typedef struct rstack_common_str RSTACK_COMMON_TYPE;
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struct rstack_common_str {
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unsigned int common_no; /* COMMON number */
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unsigned int offset; /* Offset within COMMON */
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};
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/* Integer constant entry */
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typedef struct rstack_integer_str RSTACK_INTEGER_TYPE;
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struct rstack_integer_str {
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long value; /* constant value */
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};
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/* Subroutine entry */
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typedef struct rstack_subroutine_str RSTACK_SUBROUTINE_TYPE;
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struct rstack_subroutine_str {
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char * text; /* subroutine reference */
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};
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typedef struct rstack_str RSTACK_TYPE, *RSTACK_PTR;
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struct rstack_str {
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RSTACK_PTR previous; /* pointer to stack element below this */
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int type; /* Type of entry */
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int duplicate; /* Has been duplicated by DUP opcode */
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union {
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RSTACK_TEXT_TYPE expr;
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RSTACK_LOCAL_TYPE local;
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RSTACK_COMMON_TYPE common;
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RSTACK_INTEGER_TYPE integer;
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RSTACK_SUBROUTINE_TYPE subr;
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} data;
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};
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extern RSTACK_PTR rstack_top; /* top of stack, i.e. newest entry */
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/* As de-compilation proceeds, lines of generated output are held in
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* a linked list of output_line structures. For each line, we also
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* hold the offset in the object file where the code for that line
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* starts. This allows us to identify and mark the target line for
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* each branch opcode.
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*/
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typedef struct output_line_str OUTPUT_LINE_TYPE, *OUTPUT_LINE_PTR;
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struct output_line_str {
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OUTPUT_LINE_PTR next; /* Link to next line */
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OUTPUT_LINE_PTR previous; /* Link to previous line */
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union {
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char * text; /* Text of line */
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COMMON_PTR common; /* COMMON data area */
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} line;
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long offset; /* Start pos. in object code */
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int level; /* Logical indentation level */
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int branch; /* Used as a branch target */
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int type; /* Text or other */
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};
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/* Most lines are held as text, but some are incomplete, e.g.
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* those for COMMON areas. The 'type' field identifies which,
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* taking on the values below:
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*/
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#define OL_EMPTY 0 /* Line not created yet */
|
||
|
|
#define OL_TEXT 1 /* Normal text line */
|
||
|
|
#define OL_COMMON 2 /* COMMON declaration */
|
||
|
|
|
||
|
|
extern OUTPUT_LINE_PTR output_first; /* First line of output */
|
||
|
|
extern OUTPUT_LINE_PTR output_last; /* Last line of output */
|
||
|
|
|
||
|
|
/* The target offsets for forward branches are held in a sorted linked
|
||
|
|
* linked list of PENDING_BRANCH structures.
|
||
|
|
*/
|
||
|
|
typedef struct pending_branch_str PENDING_BRANCH_TYPE, *PENDING_BRANCH_PTR;
|
||
|
|
struct pending_branch_str {
|
||
|
|
PENDING_BRANCH_PTR next; /* Link to next in list */
|
||
|
|
long offset; /* Offset that occurs as branch target */
|
||
|
|
};
|
||
|
|
|
||
|
|
extern PENDING_BRANCH_PTR pending_branch_first;
|
||
|
|
|
||
|
|
/* Control structures are handled by a stack of level_str structures.
|
||
|
|
* Each one contains state indicators relating to ON ERROR clauses,
|
||
|
|
* LOCKED clauses, and other clauses, as well as the offset of the
|
||
|
|
* end of the current part of the control structure.
|
||
|
|
*
|
||
|
|
* State values are as follows:
|
||
|
|
*/
|
||
|
|
#define NOT_ACTIVE 0 /* Applies all indicators */
|
||
|
|
/*
|
||
|
|
* Values for "ON ERROR" status
|
||
|
|
*/
|
||
|
|
#define ONERR_START 1 /* 'ONERR' opcode seen */
|
||
|
|
#define ONERR_IO_SEEN 2 /* I/O opcode seen, BRLNERR expected */
|
||
|
|
#define ONERR_GOING 3 /* In "ON ERROR" clause */
|
||
|
|
/*
|
||
|
|
* Values for "LOCKED" status
|
||
|
|
*/
|
||
|
|
#define LOCKED_START 1 /* 'LDIOOPT' opcode seen */
|
||
|
|
#define LOCKED_IO_SEEN 2 /* I/O opcode seen, LOCKED expected */
|
||
|
|
#define LOCKED_BRL1 3 /* First BRLFALS seen */
|
||
|
|
#define LOCKED_GOING 4 /* In "LOCKED" clause */
|
||
|
|
#define LOCKED_RECLOCK 5 /* Seen RECORDLOCK statement */
|
||
|
|
/*
|
||
|
|
* Values for other clause status
|
||
|
|
*/
|
||
|
|
#define CTL_START 1 /* Expecting "THEN" */
|
||
|
|
#define CTL_THEN_GOING 2 /* In "THEN" clause */
|
||
|
|
#define CTL_ELSE_GOING 3 /* In "ELSE" clause */
|
||
|
|
#define CTL_FOR_START 4 /* Seen "FORINIT", expecting "FORTST" */
|
||
|
|
#define CTL_FOR_GOING 5 /* In "FOR/NEXT" loop */
|
||
|
|
#define CTL_FILELOCK 6 /* Expecting fake "THEN" */
|
||
|
|
#define CTL_ELSE_EXPR 7 /* In "ELSE" part of conditional expression */
|
||
|
|
|
||
|
|
typedef struct level_str LEVEL_TYPE, *LEVEL_PTR;
|
||
|
|
struct level_str {
|
||
|
|
LEVEL_PTR previous; /* Link to level below this one */
|
||
|
|
int depth; /* Nesting depth */
|
||
|
|
int onerr; /* ON ERROR status */
|
||
|
|
int locked; /* LOCKED status */
|
||
|
|
int ctl; /* other control status */
|
||
|
|
int needelse; /* This THEN needs an ELSE */
|
||
|
|
unsigned int for_top; /* FOR-loop top-of-loop address */
|
||
|
|
unsigned int end_offset; /* End of current structure */
|
||
|
|
};
|
||
|
|
|
||
|
|
extern LEVEL_PTR level_base; /* base of level stack, i.e. 1st entry */
|
||
|
|
extern LEVEL_PTR level_top; /* top of level stack, i.e. last entry */
|
||
|
|
extern LEVEL_TYPE cur_status; /* Current situation */
|
||
|
|
|
||
|
|
/* The number of dimensions associated with each local variable
|
||
|
|
* is held in the local_dims array;
|
||
|
|
*/
|
||
|
|
extern int * local_dims;
|
||
|
|
|
||
|
|
/* For each call to a user-defined function, a separate DEFFUN
|
||
|
|
* is created. These are held in a separate linked list and
|
||
|
|
* written out at the beginning of the generated output.
|
||
|
|
*/
|
||
|
|
typedef struct deffun_line_str DEFFUN_LINE_TYPE, *DEFFUN_LINE_PTR;
|
||
|
|
struct deffun_line_str {
|
||
|
|
DEFFUN_LINE_PTR next; /* Link to next line */
|
||
|
|
DEFFUN_LINE_PTR previous; /* Link to previous line */
|
||
|
|
char * text; /* Text of line */
|
||
|
|
};
|
||
|
|
|
||
|
|
extern DEFFUN_LINE_PTR deffun_first; /* Start of DEFFUN list */
|
||
|
|
extern DEFFUN_LINE_PTR deffun_last; /* End of DEFFUN list */
|
||
|
|
|
||
|
|
/* saved_capture_variable holds the argument to !SMA.CAPTURING,
|
||
|
|
* for use by EXECUTE */
|
||
|
|
extern char * saved_capture_variable;
|
||
|
|
|
||
|
|
/* using_names indicates whether or not original names are being
|
||
|
|
* used for local variables. */
|
||
|
|
extern int using_names;
|
||
|
|
|
||
|
|
/***********************************************************************
|
||
|
|
*
|
||
|
|
* Procedure declarations
|
||
|
|
*
|
||
|
|
***********************************************************************/
|
||
|
|
|
||
|
|
/* Routines to handle the 'pfile' structure */
|
||
|
|
|
||
|
|
long get_paddr proto((struct p_file *pfile));
|
||
|
|
int get_pchar proto((struct p_file *pfile));
|
||
|
|
unsigned long get_plong proto((struct p_file *pfile));
|
||
|
|
unsigned int get_pshort proto((struct p_file *pfile));
|
||
|
|
int open_pfile proto((struct p_file *pfile, char *pfile_name));
|
||
|
|
int seek_pfile proto((struct p_file *pfile, long where));
|
||
|
|
int size_pfile proto((struct p_file *pfile, long * size_output));
|
||
|
|
|
||
|
|
/* Date/time conversion routines */
|
||
|
|
int get_date proto((char *buf, long date_value));
|
||
|
|
int get_time proto((char *buf, long time_value));
|
||
|
|
|
||
|
|
/* Template expander */
|
||
|
|
char * expand_template proto((
|
||
|
|
char * xtmplptr, /* Pointer to template */
|
||
|
|
char * xidptr, /* Pointer to message id */
|
||
|
|
char * xargptr /* Pointer to argument list */
|
||
|
|
));
|
||
|
|
|
||
|
|
/* @-variable lookup */
|
||
|
|
char * get_at_var proto((unsigned int devsys_offset));
|
||
|
|
|
||
|
|
/* Output of $OPTIONS lines */
|
||
|
|
void write_dollar_options proto((FILE * outfile, unsigned long opt_word));
|
||
|
|
|
||
|
|
/* Generated-subroutine lookup */
|
||
|
|
int gs_lookup proto((char **arg_vector, int *is_special));
|
||
|
|
|
||
|
|
/* Table of local-variable names */
|
||
|
|
int load_variable_names proto((long where));
|
||
|
|
char * get_local_var_name proto((unsigned int local_var_no));
|
||
|
|
char * get_common_var_name proto((COMMON_PTR cp, unsigned int common_offset));
|
||
|
|
void generate_unique proto((char * new_name));
|
||
|
|
|