obj.h

这是一个同样来自贝尔实验室的和UNIX有着渊源的操作系统, 其简洁的设计和实现易于我们学习和理解

/*
 * obj.h -- defs for dealing with object files
 */

typedef enum Kind		/* variable defs and references in obj */
{
	aNone,			/* we don't care about this prog */
	aName,			/* introduces a name */
	aText,			/* starts a function */
	aData,			/* references to a global object */
} Kind;

typedef struct	Prog	Prog;

struct Prog		/* info from .$O files */
{
	Kind	kind;		/* what kind of symbol */
	char	type;		/* type of the symbol: ie, 'T', 'a', etc. */
	char	sym;		/* index of symbol's name */
	char	*id;		/* name for the symbol, if it introduces one */
	uint	sig;		/* type signature for symbol */
};

#define UNKNOWN	'?'
void		_offset(int, vlong);