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|
/*
* |-----------------------------------------------------------|
* | Copyright (c) 1992, 1991, 1990 MIPS Computer Systems, Inc.|
* | MIPS Computer Systems, Inc. grants reproduction and use |
* | rights to all parties, PROVIDED that this comment is |
* | maintained in the copy. |
* |-----------------------------------------------------------|
*/
/* $Header$ */
#ifndef _SYM_H
#define _SYM_H
/* (C) Copyright 1984 by Third Eye Software, Inc.
*
* Third Eye Software, Inc. grants reproduction and use rights to
* all parties, PROVIDED that this comment is maintained in the copy.
*
* Third Eye makes no claims about the applicability of this
* symbol table to a particular use.
*/
/*
* This file contains the definition of the Third Eye Symbol Table.
*
* Symbols are assumed to be in 'encounter order' - i.e. the order that
* the things they represent were encountered by the compiler/assembler/loader.
* EXCEPT for globals! These are assumed to be bunched together,
* probably right after the last 'normal' symbol. Globals ARE sorted
* in ascending order.
*
* -----------------------------------------------------------------------
* A brief word about Third Eye naming/use conventions:
*
* All arrays and index's are 0 based.
* All "ifooMax" values are the highest legal value PLUS ONE. This makes
* them good for allocating arrays, etc. All checks are "ifoo < ifooMax".
*
* "isym" Index into the SYMbol table.
* "ipd" Index into the Procedure Descriptor array.
* "ifd" Index into the File Descriptor array.
* "iss" Index into String Space.
* "cb" Count of Bytes.
* "rgPd" array whose domain is "0..ipdMax-1" and RanGe is PDR.
* "rgFd" array whose domain is "0..ifdMax-1" and RanGe is FDR.
*/
/*
* Symbolic Header (HDR) structure.
* As long as all the pointers are set correctly,
* we don't care WHAT order the various sections come out in!
*
* A file produced solely for the use of CDB will probably NOT have
* any instructions or data areas in it, as these are available
* in the original.
*/
#ifdef _LANGUAGE_C
#ifdef __lint
#include <exception.h> /* defines struct exception_info */
#endif
typedef struct {
short magic; /* to verify validity of the table */
short vstamp; /* version stamp */
long ilineMax; /* number of line number entries */
long cbLine; /* number of bytes for line number entries */
long cbLineOffset; /* offset to start of line number entries*/
long idnMax; /* max index into dense number table */
long cbDnOffset; /* offset to start dense number table */
long ipdMax; /* number of procedures */
long cbPdOffset; /* offset to procedure descriptor table */
long isymMax; /* number of local symbols */
long cbSymOffset; /* offset to start of local symbols*/
long ioptMax; /* max index into optimization symbol entries */
long cbOptOffset; /* offset to optimization symbol entries */
long iauxMax; /* number of auxillary symbol entries */
long cbAuxOffset; /* offset to start of auxillary symbol entries*/
long issMax; /* max index into local strings */
long cbSsOffset; /* offset to start of local strings */
long issExtMax; /* max index into external strings */
long cbSsExtOffset; /* offset to start of external strings */
long ifdMax; /* number of file descriptor entries */
long cbFdOffset; /* offset to file descriptor table */
long crfd; /* number of relative file descriptor entries */
long cbRfdOffset; /* offset to relative file descriptor table */
long iextMax; /* max index into external symbols */
long cbExtOffset; /* offset to start of external symbol entries*/
/* If you add machine dependent fields, add them here */
} HDRR, *pHDRR;
#define cbHDRR sizeof(HDRR)
#define hdrNil ((pHDRR)0)
/*
* The FDR and PDR structures speed mapping of address <-> name.
* They are sorted in ascending memory order and are kept in
* memory by CDB at runtime.
*/
/*
* File Descriptor
*
* There is one of these for EVERY FILE, whether compiled with
* full debugging symbols or not. The name of a file should be
* the path name given to the compiler. This allows the user
* to simply specify the names of the directories where the COMPILES
* were done, and we will be able to find their files.
* A field whose comment starts with "R - " indicates that it will be
* setup at runtime.
*/
typedef struct fdr {
unsigned long adr; /* memory address of beginning of file */
long rss; /* file name (of source, if known) */
long issBase; /* file's string space */
long cbSs; /* number of bytes in the ss */
long isymBase; /* beginning of symbols */
long csym; /* count file's of symbols */
long ilineBase; /* file's line symbols */
long cline; /* count of file's line symbols */
long ioptBase; /* file's optimization entries */
long copt; /* count of file's optimization entries */
unsigned short ipdFirst;/* start of procedures for this file */
short cpd; /* count of procedures for this file */
long iauxBase; /* file's auxiliary entries */
long caux; /* count of file's auxiliary entries */
long rfdBase; /* index into the file indirect table */
long crfd; /* count file indirect entries */
unsigned lang: 5; /* language for this file */
unsigned fMerge : 1; /* whether this file can be merged */
unsigned fReadin : 1; /* true if it was read in (not just created) */
unsigned fBigendian : 1;/* if set, was compiled on big endian machine */
/* aux's will be in compile host's sex */
unsigned glevel : 2; /* level this file was compiled with */
unsigned reserved : 22; /* reserved for future use */
long cbLineOffset; /* byte offset from header for this file ln's */
long cbLine; /* size of lines for this file */
} FDR, *pFDR;
#define cbFDR sizeof(FDR)
#define fdNil ((pFDR)0)
#define ifdNil -1
#define ifdTemp 0
#define ilnNil -1
/*
* Procedure Descriptor
*
* There is one of these for EVERY TEXT LABEL.
* If a procedure is in a file with full symbols, then isym
* will point to the PROC symbols, else it will point to the
* global symbol for the label.
*/
typedef struct pdr {
unsigned long adr; /* memory address of start of procedure */
long isym; /* start of local symbol entries */
long iline; /* start of line number entries*/
long regmask; /* save register mask */
long regoffset; /* save register offset */
long iopt; /* start of optimization symbol entries*/
long fregmask; /* save floating point register mask */
long fregoffset; /* save floating point register offset */
long frameoffset; /* frame size */
short framereg; /* frame pointer register */
short pcreg; /* offset or reg of return pc */
long lnLow; /* lowest line in the procedure */
long lnHigh; /* highest line in the procedure */
long cbLineOffset; /* byte offset for this procedure from the fd base */
} PDR, *pPDR;
#define cbPDR sizeof(PDR)
#define pdNil ((pPDR) 0)
#define ipdNil -1
/*
* The structure of the runtime procedure descriptor created by the loader
* for use by the static exception system.
*/
typedef struct runtime_pdr {
unsigned long adr; /* memory address of start of procedure */
long regmask; /* save register mask */
long regoffset; /* save register offset */
long fregmask; /* save floating point register mask */
long fregoffset; /* save floating point register offset */
long frameoffset; /* frame size */
short framereg; /* frame pointer register */
short pcreg; /* offset or reg of return pc */
long irpss; /* index into the runtime string table */
long reserved;
struct exception_info *exception_info;/* pointer to exception array */
} RPDR, *pRPDR;
#define cbRPDR sizeof(RPDR)
#define rpdNil ((pRPDR) 0)
/*
* Line Numbers
*
* Line Numbers are segregated from the normal symbols because they
* are [1] smaller , [2] are of no interest to your
* average loader, and [3] are never needed in the middle of normal
* scanning and therefore slow things down.
*
* By definition, the first LINER for any given procedure will have
* the first line of a procedure and represent the first address.
*/
typedef long LINER, *pLINER;
#define lineNil ((pLINER)0)
#define cbLINER sizeof(LINER)
#define ilineNil -1
/*
* The Symbol Structure (GFW, to those who Know!)
*/
typedef struct {
long iss; /* index into String Space of name */
long value; /* value of symbol */
unsigned st : 6; /* symbol type */
unsigned sc : 5; /* storage class - text, data, etc */
unsigned reserved : 1; /* reserved */
unsigned index : 20; /* index into sym/aux table */
} SYMR, *pSYMR;
#define symNil ((pSYMR)0)
#define cbSYMR sizeof(SYMR)
#define isymNil -1
#define indexNil 0xfffff
#define issNil -1
#define issNull 0
/* The following converts a memory resident string to an iss.
* This hack is recognized in SbFIss, in sym.c of the debugger.
*/
#define IssFSb(sb) (0x80000000 | ((unsigned long)(sb)))
/* E X T E R N A L S Y M B O L R E C O R D
*
* Same as the SYMR except it contains file context to determine where
* the index is.
*/
typedef struct {
unsigned jmptbl:1; /* symbol is a jump table entry for shlibs */
unsigned cobol_main:1; /* symbol is a cobol main procedure */
unsigned weakext:1; /* symbol is weak external */
unsigned reserved:13; /* reserved for future use */
short ifd; /* where the iss and index fields point into */
SYMR asym; /* symbol for the external */
} EXTR, *pEXTR;
#define extNil ((pEXTR)0)
#define cbEXTR sizeof(EXTR)
/* A U X I L L A R Y T Y P E I N F O R M A T I O N */
/*
* Type Information Record
*/
typedef struct {
unsigned fBitfield : 1; /* set if bit width is specified */
unsigned continued : 1; /* indicates additional TQ info in next AUX */
unsigned bt : 6; /* basic type */
unsigned tq4 : 4;
unsigned tq5 : 4;
/* ---- 16 bit boundary ---- */
unsigned tq0 : 4;
unsigned tq1 : 4; /* 6 type qualifiers - tqPtr, etc. */
unsigned tq2 : 4;
unsigned tq3 : 4;
} TIR, *pTIR;
#define cbTIR sizeof(TIR)
#define tiNil ((pTIR)0)
#define itqMax 6
/*
* Relative symbol record
*
* If the rfd field is 4095, the index field indexes into the global symbol
* table.
*/
typedef struct {
unsigned rfd : 12; /* index into the file indirect table */
unsigned index : 20; /* index int sym/aux/iss tables */
} RNDXR, *pRNDXR;
#define cbRNDXR sizeof(RNDXR)
#define rndxNil ((pRNDXR)0)
/* dense numbers or sometimes called block numbers are stored in this type,
* a rfd of 0xffffffff is an index into the global table.
*/
typedef struct {
unsigned long rfd; /* index into the file table */
unsigned long index; /* index int sym/aux/iss tables */
} DNR, *pDNR;
#define cbDNR sizeof(DNR)
#define dnNil ((pDNR)0)
/*
* Auxillary information occurs only if needed.
* It ALWAYS occurs in this order when present.
isymMac used by stProc only
TIR type info
TIR additional TQ info (if first TIR was not enough)
rndx if (bt == btStruct,btUnion,btEnum,btSet,btRange,
btTypedef):
rsym.index == iaux for btSet or btRange
else rsym.index == isym
dimLow btRange, btSet
dimMac btRange, btSet
rndx0 As many as there are tq arrays
dimLow0
dimHigh0
...
rndxMax-1
dimLowMax-1
dimHighMax-1
width in bits if (bit field), width in bits.
*/
#define cAuxMax (6 + (idimMax*3))
/* a union of all possible info in the AUX universe */
typedef union {
TIR ti; /* type information record */
RNDXR rndx; /* relative index into symbol table */
long dnLow; /* low dimension */
long dnHigh; /* high dimension */
long isym; /* symbol table index (end of proc) */
long iss; /* index into string space (not used) */
long width; /* width for non-default sized struc fields */
long count; /* count of ranges for variant arm */
} AUXU, *pAUXU;
#define cbAUXU sizeof(AUXU)
#define auxNil ((pAUXU)0)
#define iauxNil -1
/*
* Optimization symbols
*
* Optimization symbols contain some overlap information with the normal
* symbol table. In particular, the proc information
* is somewhat redundant but necessary to easily find the other information
* present.
*
* All of the offsets are relative to the beginning of the last otProc
*/
typedef struct {
unsigned ot: 8; /* optimization type */
unsigned value: 24; /* address where we are moving it to */
RNDXR rndx; /* points to a symbol or opt entry */
unsigned long offset; /* relative offset this occured */
} OPTR, *pOPTR;
#define optNil ((pOPTR) 0)
#define cbOPTR sizeof(OPTR)
#define ioptNil -1
/*
* File Indirect
*
* When a symbol is referenced across files the following procedure is used:
* 1) use the file index to get the File indirect entry.
* 2) use the file indirect entry to get the File descriptor.
* 3) add the sym index to the base of that file's sym table
*
*/
typedef long RFDT, *pRFDT;
#define cbRFDT sizeof(RFDT)
#define rfdNil -1
/*
* The file indirect table in the mips loader is known as an array of FITs.
* This is done to keep the code in the loader readable in the area where
* these tables are merged. Note this is only a name change.
*/
typedef long FIT, *pFIT;
#define cbFIT sizeof(FIT)
#define ifiNil -1
#define fiNil ((pFIT) 0)
#endif /* _LANGUAGE_C */
#ifdef _LANGUAGE_PASCAL
#define ifdNil -1
#define ilnNil -1
#define ipdNil -1
#define ilineNil -1
#define isymNil -1
#define indexNil 16#fffff
#define issNil -1
#define issNull 0
#define itqMax 6
#define iauxNil -1
#define ioptNil -1
#define rfdNil -1
#define ifiNil -1
#endif /* _LANGUAGE_PASCAL */
/* Dense numbers
*
* Rather than use file index, symbol index pairs to represent symbols
* and globals, we use dense number so that they can be easily embeded
* in intermediate code and the programs that process them can
* use direct access tabls instead of hash table (which would be
* necesary otherwise because of the sparse name space caused by
* file index, symbol index pairs. Dense number are represented
* by RNDXRs.
*/
/*
* The following table defines the meaning of each SYM field as
* a function of the "st". (scD/B == scData OR scBss)
*
* Note: the value "isymMac" is used by symbols that have the concept
* of enclosing a block of related information. This value is the
* isym of the first symbol AFTER the end associated with the primary
* symbol. For example if a procedure was at isym==90 and had an
* isymMac==155, the associated end would be at isym==154, and the
* symbol at 155 would probably (although not necessarily) be the
* symbol for the next procedure. This allows rapid skipping over
* internal information of various sorts. "stEnd"s ALWAYS have the
* isym of the primary symbol that started the block.
*
ST SC VALUE INDEX
-------- ------ -------- ------
stFile scText address isymMac
stLabel scText address ---
stGlobal scD/B address iaux
stStatic scD/B address iaux
stParam scAbs offset iaux
stLocal scAbs offset iaux
stProc scText address iaux (isymMac is first AUX)
stStaticProc scText address iaux (isymMac is first AUX)
stMember scNil ordinal --- (if member of enum)
stMember scNil byte offset iaux (if member of struct/union)
stMember scBits bit offset iaux (bit field spec)
stBlock scText address isymMac (text block)
stBlock scNil cb isymMac (struct/union member define)
stBlock scNil cMembers isymMac (enum member define)
stEnd scText address isymStart
stEnd scNil ------- isymStart (struct/union/enum)
stTypedef scNil ------- iaux
stRegReloc sc??? value old register number
stForward sc??? new address isym to original symbol
stConstant scInfo value --- (scalar)
stConstant scInfo iss --- (complex, e.g. string)
*
*/
/* $Log$
/* Revision 1.1 1992/04/03 04:01:32 gnu
/* Date: Thu, 2 Apr 92 15:48:13 -0800
/* From: wu@mips.com (Alex Wu)
/* Message-Id: <9204022348.AA20058@goofy.mips.com>
/* To: gnu@cygnus.com
/* Subject: sym.h & symconst.h
/*
/* John,
/* I finally get our lawyer's approval. Here is the symconst.h and
/* the sym.h. Please let me know if there is anything else I can help.
/*
* Revision 3000.5.1.2 91/05/31 18:27:22 bettina
* fix DFARS in copyright
*
* Revision 3000.5.1.1 91/04/15 20:51:26 bettina
* fix copyright
*
* Revision 3000.5 91/04/09 13:39:51 keithm
* Added DEC specific changes.
*
* Revision 3000.3 91/03/13 18:55:54 karen
* changed __SYM_H to _SYM_H
*
* Revision 3000.2 90/12/10 13:53:26 zaineb
* Ansi Changes
*
* Revision 2020.2.1.1 90/10/30 12:31:15 shin
* copy from 2.21 for weakext flag
*
* Revision 2021.2 90/10/19 10:55:23 shin
* added weakext flag in EXTR structure
*
* Revision 2021.1 90/06/07 23:09:19 bettina
* 2.21 - branching off 2.20 for ansi C
*
* Revision 2020.2 90/05/17 18:17:57 chan
* *** empty log message ***
*
* Revision 2010.7.1.6 90/02/22 19:53:48 bettina
* 2.10 F1
*
* Revision 2010.7.1.5 89/11/29 22:41:00 bettina
* 2.10 BETA2
*
* Revision 2010.3 89/10/05 10:44:44 lai
* added lint wrapper
*
* Revision 2010.2 89/09/26 23:40:45 lai
* added #include exception.h
*
* Revision 2010.1 89/09/26 20:47:45 lai
* updated to 2.10
*
* Revision 1.3 89/09/26 20:08:54 lai
* added wrapper and $LOG
* updated for 2.10
*
*/
#endif
|