NetBoot/vasm-1/symbol.h
2020-06-20 09:33:04 +08:00

101 lines
2.5 KiB
C

/* symbol.h - manage all kinds of symbols */
/* (c) in 2014-2020 by Volker Barthelmann and Frank Wille */
#ifndef SYMBOL_H
#define SYMBOL_H
/* symbol types */
#define LABSYM 1
#define IMPORT 2
#define EXPRESSION 3
/* symbol flags */
#define TYPE_MASK 7
#define TYPE_UNKNOWN 0
#define TYPE_OBJECT 1
#define TYPE_FUNCTION 2
#define TYPE_SECTION 3
#define TYPE_FILE 4
#define TYPE_LAST 4
#define TYPE(sym) ((sym)->flags&TYPE_MASK)
#define EXPORT (1<<3)
#define INEVAL (1<<4)
#define COMMON (1<<5)
#define WEAK (1<<6)
#define LOCAL (1<<7) /* only informational */
#define VASMINTERN (1<<8)
#define PROTECTED (1<<9)
#define REFERENCED (1<<10) /* referenced by a relocation */
#define ABSLABEL (1<<11)
#define EQUATE (1<<12)
#define REGLIST (1<<13)
#define USED (1<<14) /* used in any expression */
#define NEAR (1<<15) /* may refer symbol with near addressing modes */
#define RSRVD_C (1L<<20) /* bits 20..23 are reserved for cpu modules */
#define RSRVD_S (1L<<24) /* bits 24..27 are reserved for syntax modules */
#define RSRVD_O (1L<<28) /* bits 28..31 are reserved for output modules */
struct symbol {
struct symbol *next;
int type;
uint32_t flags;
char *name;
expr *expr;
expr *size;
section *sec;
taddr pc;
taddr align;
unsigned long idx; /* usable by output module */
};
/* type of symbol references */
#define LOCREF(symp) ((symp)->type==LABSYM&&!((symp)->flags&WEAK))
#define EXTREF(symp) ((symp)->type==IMPORT||((symp)->flags&WEAK))
#ifdef HAVE_REGSYMS
/* register symbols */
struct regsym {
char *reg_name;
int reg_type;
unsigned int reg_flags;
unsigned int reg_num;
};
#endif /* HAVE_REGSYMS */
extern symbol *first_symbol;
void print_symbol(FILE *,symbol *);
char *get_bind_name(symbol *);
void add_symbol(symbol *);
symbol *find_symbol(char *);
void refer_symbol(symbol *,char *);
void save_symbols(void);
void restore_symbols(void);
int check_symbol(char *);
char *set_last_global_label(char *);
int is_local_label(char *);
char *make_local_label(char *,int,char *,int);
symbol *new_abs(char *,expr *);
symbol *new_equate(char *,expr *);
symbol *new_import(char *);
symbol *new_labsym(section *,char *);
symbol *new_tmplabel(section *);
symbol *internal_abs(char *);
expr *set_internal_abs(char *,taddr);
#ifdef HAVE_REGSYMS
void add_regsym(regsym *);
regsym *find_regsym(char *,int);
regsym *find_regsym_nc(char *,int);
regsym *new_regsym(int,int,char *,int,unsigned int,unsigned int);
int undef_regsym(char *,int,int);
#endif /* HAVE_REGSYMS */
int init_symbol(void);
#endif