syms.5

来自「<B>Digital的Unix操作系统VAX 4.2源码</B>」· 5 代码 · 共 70 行

.TH syms 5 RISC
.SH Name
syms \- MIPS symbol table
.SH Syntax
.B "#include < sym.h>"
.br
.B "#include < symconst.h>"
.SH Description
Unlike the COFF symbol table, the MIPS symbol table consists of
many tables unbundling information.  The symbol table should be 
viewed as a network-style database designed for space and access efficiency.
.NXR "symbol table"
.PP
The following structures or tables appear in the MIPS symbol table:
.TP 25
\fBTABLE\fR
\fBCONTENTS\fR
.TP 25
Symbolic header	
Sizes and locations of all other tables
.TP 25
File descriptors
Per file locations for other tables
.TP 25
Procedure descriptors	
Frame information and location of procedure info
.TP 25
Local symbols	
Local type, local variable, and scoping info
.TP 25
Local strings	
String space for local symbols
.TP 25
Line numbers	
Compacted by encoding, contains a line per instruction
.TP 25
Relative file descriptors	
Indirection for interfile symbol access
.TP 25
Optimization symbols	
To be defined
.TP 25
Auxiliary symbols	
Variable data type information for each local symbol
.TP 25
External symbols	
Loader symbols (global text and data)
.TP 25
External strings	
String space for external symbols
.TP 25
Dense numbers	
Index pairs (file, symbol) for compiler use
.PP
External and local symbols contain the standard concept of a symbol as
follows:
.EX
struct
{
	long	iss;	/* index into string space */
	long	value;	/* address, size, etc., depends on sc and st */
	unsigned	st: 6;	/* symbol type (e.g. local, param, etc.) */
	unsigned	sc: 5;	/* storage class (e.g. text, bss, etc.) */
	unsigned	reserved: 1;
	unsigned	index;	/* index to symbol or auxiliary tables */
};
.EE
.SH See Also
ldfcn(5)