361 lines
8.2 KiB
C
361 lines
8.2 KiB
C
/*
|
|
* Mach Operating System
|
|
* Copyright (c) 1991,1990 Carnegie Mellon University
|
|
* All Rights Reserved.
|
|
*
|
|
* Permission to use, copy, modify and distribute this software and its
|
|
* documentation is hereby granted, provided that both the copyright
|
|
* notice and this permission notice appear in all copies of the
|
|
* software, derivative works or modified versions, and any portions
|
|
* thereof, and that both notices appear in supporting documentation.
|
|
*
|
|
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
|
|
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
|
|
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
|
|
*
|
|
* Carnegie Mellon requests users of this software to return to
|
|
*
|
|
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
|
|
* School of Computer Science
|
|
* Carnegie Mellon University
|
|
* Pittsburgh PA 15213-3890
|
|
*
|
|
* any improvements or extensions that they make and grant Carnegie the
|
|
* rights to redistribute these changes.
|
|
*/
|
|
/*
|
|
* HISTORY
|
|
* $Log: db_sym.c,v $
|
|
* Revision 1.1 1992/03/25 21:45:27 pace
|
|
* Initial revision
|
|
*
|
|
* Revision 2.5 91/02/05 17:07:07 mrt
|
|
* Changed to new Mach copyright
|
|
* [91/01/31 16:19:17 mrt]
|
|
*
|
|
* Revision 2.4 90/10/25 14:44:05 rwd
|
|
* Changed db_printsym to print unsigned.
|
|
* [90/10/19 rpd]
|
|
*
|
|
* Revision 2.3 90/09/09 23:19:56 rpd
|
|
* Avoid totally incorrect guesses of symbol names for small values.
|
|
* [90/08/30 17:39:48 af]
|
|
*
|
|
* Revision 2.2 90/08/27 21:52:18 dbg
|
|
* Removed nlist.h. Fixed some type declarations.
|
|
* Qualifier character is ':'.
|
|
* [90/08/20 dbg]
|
|
* Modularized symtab info into a new db_symtab_t type.
|
|
* Modified db_add_symbol_table and others accordingly.
|
|
* Defined db_sym_t, a new (opaque) type used to represent
|
|
* symbols. This should support all sort of future symtable
|
|
* formats. Functions like db_qualify take a db_sym_t now.
|
|
* New db_symbol_values() function to explode the content
|
|
* of a db_sym_t.
|
|
* db_search_symbol() replaces db_find_sym_and_offset(), which is
|
|
* now a macro defined in our (new) header file. This new
|
|
* function accepts more restrictive searches, which are
|
|
* entirely delegated to the symtab-specific code.
|
|
* Accordingly, db_printsym() accepts a strategy parameter.
|
|
* New db_line_at_pc() function.
|
|
* Renamed misleading db_eqsym into db_eqname.
|
|
* [90/08/20 10:47:06 af]
|
|
*
|
|
* Created.
|
|
* [90/07/25 dbg]
|
|
*
|
|
* Revision 2.1 90/07/26 16:43:52 dbg
|
|
* Created.
|
|
*
|
|
*/
|
|
/*
|
|
* Author: David B. Golub, Carnegie Mellon University
|
|
* Date: 7/90
|
|
*/
|
|
#include "param.h"
|
|
#include "proc.h"
|
|
#include <machine/db_machdep.h>
|
|
#include <ddb/db_sym.h>
|
|
|
|
/*
|
|
* We import from the symbol-table dependent routines:
|
|
*/
|
|
extern db_sym_t X_db_lookup();
|
|
extern db_sym_t X_db_search_symbol();
|
|
extern boolean_t X_db_line_at_pc();
|
|
extern void X_db_symbol_values();
|
|
|
|
/*
|
|
* Multiple symbol tables
|
|
*/
|
|
#define MAXNOSYMTABS 3 /* mach, ux, emulator */
|
|
|
|
db_symtab_t db_symtabs[MAXNOSYMTABS] = {{0,},};
|
|
int db_nsymtab = 0;
|
|
|
|
db_symtab_t *db_last_symtab;
|
|
|
|
db_sym_t db_lookup(); /* forward */
|
|
|
|
/*
|
|
* Add symbol table, with given name, to list of symbol tables.
|
|
*/
|
|
void
|
|
db_add_symbol_table(start, end, name, ref)
|
|
char *start;
|
|
char *end;
|
|
char *name;
|
|
char *ref;
|
|
{
|
|
if (db_nsymtab >= MAXNOSYMTABS) {
|
|
printf ("No slots left for %s symbol table", name);
|
|
panic ("db_sym.c: db_add_symbol_table");
|
|
}
|
|
|
|
db_symtabs[db_nsymtab].start = start;
|
|
db_symtabs[db_nsymtab].end = end;
|
|
db_symtabs[db_nsymtab].name = name;
|
|
db_symtabs[db_nsymtab].private = ref;
|
|
db_nsymtab++;
|
|
}
|
|
|
|
/*
|
|
* db_qualify("vm_map", "ux") returns "unix:vm_map".
|
|
*
|
|
* Note: return value points to static data whose content is
|
|
* overwritten by each call... but in practice this seems okay.
|
|
*/
|
|
static char *
|
|
db_qualify(sym, symtabname)
|
|
db_sym_t sym;
|
|
register char *symtabname;
|
|
{
|
|
char *symname;
|
|
static char tmp[256];
|
|
register char *s;
|
|
|
|
db_symbol_values(sym, &symname, 0);
|
|
s = tmp;
|
|
while (*s++ = *symtabname++) {
|
|
}
|
|
s[-1] = ':';
|
|
while (*s++ = *symname++) {
|
|
}
|
|
return tmp;
|
|
}
|
|
|
|
|
|
boolean_t
|
|
db_eqname(src, dst, c)
|
|
char *src;
|
|
char *dst;
|
|
char c;
|
|
{
|
|
if (!strcmp(src, dst))
|
|
return (TRUE);
|
|
if (src[0] == c)
|
|
return (!strcmp(src+1,dst));
|
|
return (FALSE);
|
|
}
|
|
|
|
boolean_t
|
|
db_value_of_name(name, valuep)
|
|
char *name;
|
|
db_expr_t *valuep;
|
|
{
|
|
db_sym_t sym;
|
|
|
|
sym = db_lookup(name);
|
|
if (sym == DB_SYM_NULL)
|
|
return (FALSE);
|
|
db_symbol_values(sym, &name, valuep);
|
|
return (TRUE);
|
|
}
|
|
|
|
|
|
/*
|
|
* Lookup a symbol.
|
|
* If the symbol has a qualifier (e.g., ux:vm_map),
|
|
* then only the specified symbol table will be searched;
|
|
* otherwise, all symbol tables will be searched.
|
|
*/
|
|
db_sym_t
|
|
db_lookup(symstr)
|
|
char *symstr;
|
|
{
|
|
db_sym_t sp;
|
|
register int i;
|
|
int symtab_start = 0;
|
|
int symtab_end = db_nsymtab;
|
|
register char *cp;
|
|
|
|
/*
|
|
* Look for, remove, and remember any symbol table specifier.
|
|
*/
|
|
for (cp = symstr; *cp; cp++) {
|
|
if (*cp == ':') {
|
|
*cp = '\0';
|
|
for (i = 0; i < db_nsymtab; i++) {
|
|
if (! strcmp(symstr, db_symtabs[i].name)) {
|
|
symtab_start = i;
|
|
symtab_end = i + 1;
|
|
break;
|
|
}
|
|
}
|
|
*cp = ':';
|
|
if (i == db_nsymtab) {
|
|
db_error("invalid symbol table name");
|
|
}
|
|
symstr = cp+1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Look in the specified set of symbol tables.
|
|
* Return on first match.
|
|
*/
|
|
for (i = symtab_start; i < symtab_end; i++) {
|
|
if (sp = X_db_lookup(&db_symtabs[i], symstr)) {
|
|
db_last_symtab = &db_symtabs[i];
|
|
return sp;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Does this symbol name appear in more than one symbol table?
|
|
* Used by db_symbol_values to decide whether to qualify a symbol.
|
|
*/
|
|
boolean_t db_qualify_ambiguous_names = FALSE;
|
|
|
|
boolean_t
|
|
db_symbol_is_ambiguous(sym)
|
|
db_sym_t sym;
|
|
{
|
|
char *sym_name;
|
|
register int i;
|
|
register
|
|
boolean_t found_once = FALSE;
|
|
|
|
if (!db_qualify_ambiguous_names)
|
|
return FALSE;
|
|
|
|
db_symbol_values(sym, &sym_name, 0);
|
|
for (i = 0; i < db_nsymtab; i++) {
|
|
if (X_db_lookup(&db_symtabs[i], sym_name)) {
|
|
if (found_once)
|
|
return TRUE;
|
|
found_once = TRUE;
|
|
}
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
/*
|
|
* Find the closest symbol to val, and return its name
|
|
* and the difference between val and the symbol found.
|
|
*/
|
|
db_sym_t
|
|
db_search_symbol( val, strategy, offp)
|
|
register db_addr_t val;
|
|
db_strategy_t strategy;
|
|
db_expr_t *offp;
|
|
{
|
|
register
|
|
unsigned int diff;
|
|
unsigned int newdiff;
|
|
register int i;
|
|
db_sym_t ret = DB_SYM_NULL, sym;
|
|
|
|
newdiff = diff = ~0;
|
|
db_last_symtab = 0;
|
|
for (i = 0; i < db_nsymtab; i++) {
|
|
sym = X_db_search_symbol(&db_symtabs[i], val, strategy, &newdiff);
|
|
if (newdiff < diff) {
|
|
db_last_symtab = &db_symtabs[i];
|
|
diff = newdiff;
|
|
ret = sym;
|
|
}
|
|
}
|
|
*offp = diff;
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Return name and value of a symbol
|
|
*/
|
|
void
|
|
db_symbol_values(sym, namep, valuep)
|
|
db_sym_t sym;
|
|
char **namep;
|
|
db_expr_t *valuep;
|
|
{
|
|
db_expr_t value;
|
|
|
|
if (sym == DB_SYM_NULL) {
|
|
*namep = 0;
|
|
return;
|
|
}
|
|
|
|
X_db_symbol_values(sym, namep, &value);
|
|
|
|
if (db_symbol_is_ambiguous(sym))
|
|
*namep = db_qualify(sym, db_last_symtab->name);
|
|
if (valuep)
|
|
*valuep = value;
|
|
}
|
|
|
|
|
|
/*
|
|
* Print a the closest symbol to value
|
|
*
|
|
* After matching the symbol according to the given strategy
|
|
* we print it in the name+offset format, provided the symbol's
|
|
* value is close enough (eg smaller than db_maxoff).
|
|
* We also attempt to print [filename:linenum] when applicable
|
|
* (eg for procedure names).
|
|
*
|
|
* If we could not find a reasonable name+offset representation,
|
|
* then we just print the value in hex. Small values might get
|
|
* bogus symbol associations, e.g. 3 might get some absolute
|
|
* value like _INCLUDE_VERSION or something, therefore we do
|
|
* not accept symbols whose value is zero (and use plain hex).
|
|
*/
|
|
|
|
unsigned int db_maxoff = 0x10000000;
|
|
|
|
void
|
|
db_printsym(off, strategy)
|
|
db_expr_t off;
|
|
db_strategy_t strategy;
|
|
{
|
|
db_expr_t d;
|
|
char *filename;
|
|
char *name;
|
|
db_expr_t value;
|
|
int linenum;
|
|
db_sym_t cursym;
|
|
|
|
cursym = db_search_symbol(off, strategy, &d);
|
|
db_symbol_values(cursym, &name, &value);
|
|
if (name == 0 || d >= db_maxoff || value == 0) {
|
|
db_printf("%#n", off);
|
|
return;
|
|
}
|
|
db_printf("%s", name);
|
|
if (d)
|
|
db_printf("+%#r", d);
|
|
if (strategy == DB_STGY_PROC) {
|
|
if (db_line_at_pc(cursym, &filename, &linenum, off))
|
|
db_printf(" [%s:%d]", filename, linenum);
|
|
}
|
|
}
|
|
|
|
|
|
boolean_t
|
|
db_line_at_pc( sym, filename, linenum, pc)
|
|
{
|
|
return X_db_line_at_pc( db_last_symtab, sym, filename, linenum, pc);
|
|
}
|