1995-05-30 08:16:23 +00:00
|
|
|
/*
|
1993-06-12 14:58:17 +00:00
|
|
|
* Mach Operating System
|
|
|
|
* Copyright (c) 1991,1990 Carnegie Mellon University
|
|
|
|
* All Rights Reserved.
|
1995-05-30 08:16:23 +00:00
|
|
|
*
|
1993-06-12 14:58:17 +00:00
|
|
|
* 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.
|
1995-05-30 08:16:23 +00:00
|
|
|
*
|
|
|
|
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
|
1993-06-12 14:58:17 +00:00
|
|
|
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
|
|
|
|
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
|
1995-05-30 08:16:23 +00:00
|
|
|
*
|
1993-06-12 14:58:17 +00:00
|
|
|
* Carnegie Mellon requests users of this software to return to
|
1995-05-30 08:16:23 +00:00
|
|
|
*
|
1993-06-12 14:58:17 +00:00
|
|
|
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
|
|
|
|
* School of Computer Science
|
|
|
|
* Carnegie Mellon University
|
|
|
|
* Pittsburgh PA 15213-3890
|
1995-05-30 08:16:23 +00:00
|
|
|
*
|
1993-06-12 14:58:17 +00:00
|
|
|
* any improvements or extensions that they make and grant Carnegie the
|
|
|
|
* rights to redistribute these changes.
|
|
|
|
*
|
1999-08-28 01:08:13 +00:00
|
|
|
* $FreeBSD$
|
1993-06-12 14:58:17 +00:00
|
|
|
*/
|
1993-10-16 16:47:35 +00:00
|
|
|
|
1993-06-12 14:58:17 +00:00
|
|
|
/*
|
|
|
|
* Author: David B. Golub, Carnegie Mellon University
|
|
|
|
* Date: 7/90
|
|
|
|
*/
|
|
|
|
/*
|
|
|
|
* Symbol table routines for a.out format files.
|
|
|
|
*/
|
|
|
|
|
1998-10-09 23:29:44 +00:00
|
|
|
#if !defined(__ELF__) && !defined(__alpha__)
|
|
|
|
|
1994-08-13 03:50:34 +00:00
|
|
|
#include <sys/param.h>
|
|
|
|
#include <sys/systm.h>
|
1995-01-25 21:40:47 +00:00
|
|
|
|
|
|
|
#include <machine/bootinfo.h>
|
|
|
|
|
1994-08-13 03:50:34 +00:00
|
|
|
#include <ddb/ddb.h>
|
1993-06-12 14:58:17 +00:00
|
|
|
#include <ddb/db_sym.h>
|
|
|
|
|
|
|
|
#define _AOUT_INCLUDE_
|
1994-08-13 03:50:34 +00:00
|
|
|
#include <nlist.h>
|
|
|
|
#include <stab.h>
|
1993-06-12 14:58:17 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* An a.out symbol table as loaded into the kernel debugger:
|
|
|
|
*
|
|
|
|
* symtab -> size of symbol entries, in bytes
|
|
|
|
* sp -> first symbol entry
|
|
|
|
* ...
|
|
|
|
* ep -> last symbol entry + 1
|
|
|
|
* strtab == start of string table
|
|
|
|
* size of string table in bytes,
|
|
|
|
* including this word
|
|
|
|
* -> strings
|
|
|
|
*/
|
|
|
|
|
1995-11-29 10:25:50 +00:00
|
|
|
static void X_db_sym_init __P((int *symtab, char *esymtab, char *name));
|
1993-06-12 14:58:17 +00:00
|
|
|
/*
|
|
|
|
* Find pointers to the start and end of the symbol entries,
|
|
|
|
* given a pointer to the start of the symbol table.
|
|
|
|
*/
|
|
|
|
#define db_get_aout_symtab(symtab, sp, ep) \
|
|
|
|
(sp = (struct nlist *)((symtab) + 1), \
|
|
|
|
ep = (struct nlist *)((char *)sp + *(symtab)))
|
|
|
|
|
1995-11-29 10:25:50 +00:00
|
|
|
static void
|
1993-06-12 14:58:17 +00:00
|
|
|
X_db_sym_init(symtab, esymtab, name)
|
|
|
|
int * symtab; /* pointer to start of symbol table */
|
|
|
|
char * esymtab; /* pointer to end of string table,
|
|
|
|
for checking - rounded up to integer
|
|
|
|
boundary */
|
|
|
|
char * name;
|
|
|
|
{
|
|
|
|
register struct nlist *sym_start, *sym_end;
|
|
|
|
register struct nlist *sp;
|
|
|
|
register char * strtab;
|
|
|
|
register int strlen;
|
|
|
|
|
|
|
|
if (*symtab < 4) {
|
|
|
|
printf ("DDB: no symbols\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
db_get_aout_symtab(symtab, sym_start, sym_end);
|
|
|
|
|
|
|
|
strtab = (char *)sym_end;
|
|
|
|
strlen = *(int *)strtab;
|
|
|
|
|
|
|
|
if (strtab + ((strlen + sizeof(int) - 1) & ~(sizeof(int)-1))
|
|
|
|
!= esymtab)
|
|
|
|
{
|
|
|
|
db_printf("[ %s symbol table not valid ]\n", name);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
db_printf("[ preserving %#x bytes of %s symbol table ]\n",
|
|
|
|
esymtab - (char *)symtab, name);
|
|
|
|
|
|
|
|
for (sp = sym_start; sp < sym_end; sp++) {
|
|
|
|
register int strx;
|
|
|
|
strx = sp->n_un.n_strx;
|
|
|
|
if (strx != 0) {
|
|
|
|
if (strx > strlen) {
|
|
|
|
db_printf("Bad string table index (%#x)\n", strx);
|
|
|
|
sp->n_un.n_name = 0;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
sp->n_un.n_name = strtab + strx;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
1995-11-24 14:13:42 +00:00
|
|
|
db_add_symbol_table((char *)sym_start, (char *)sym_end, name,
|
|
|
|
(char *)symtab);
|
1993-06-12 14:58:17 +00:00
|
|
|
}
|
|
|
|
|
1999-02-12 12:15:07 +00:00
|
|
|
c_db_sym_t
|
1993-06-12 14:58:17 +00:00
|
|
|
X_db_lookup(stab, symstr)
|
|
|
|
db_symtab_t *stab;
|
1999-01-27 19:00:49 +00:00
|
|
|
const char * symstr;
|
1993-06-12 14:58:17 +00:00
|
|
|
{
|
|
|
|
register struct nlist *sp, *ep;
|
|
|
|
|
|
|
|
sp = (struct nlist *)stab->start;
|
|
|
|
ep = (struct nlist *)stab->end;
|
|
|
|
|
|
|
|
for (; sp < ep; sp++) {
|
|
|
|
if (sp->n_un.n_name == 0)
|
|
|
|
continue;
|
|
|
|
if ((sp->n_type & N_STAB) == 0 &&
|
|
|
|
sp->n_un.n_name != 0 &&
|
|
|
|
db_eqname(sp->n_un.n_name, symstr, '_'))
|
|
|
|
{
|
|
|
|
return ((db_sym_t)sp);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return ((db_sym_t)0);
|
|
|
|
}
|
|
|
|
|
1999-02-12 12:15:07 +00:00
|
|
|
c_db_sym_t
|
1993-06-12 14:58:17 +00:00
|
|
|
X_db_search_symbol(symtab, off, strategy, diffp)
|
|
|
|
db_symtab_t * symtab;
|
|
|
|
register
|
|
|
|
db_addr_t off;
|
|
|
|
db_strategy_t strategy;
|
|
|
|
db_expr_t *diffp; /* in/out */
|
|
|
|
{
|
|
|
|
register unsigned int diff = *diffp;
|
|
|
|
register struct nlist *symp = 0;
|
|
|
|
register struct nlist *sp, *ep;
|
|
|
|
|
|
|
|
sp = (struct nlist *)symtab->start;
|
|
|
|
ep = (struct nlist *)symtab->end;
|
|
|
|
|
|
|
|
for (; sp < ep; sp++) {
|
|
|
|
if (sp->n_un.n_name == 0)
|
|
|
|
continue;
|
1994-01-03 07:54:10 +00:00
|
|
|
if ((sp->n_type & N_STAB) != 0 || (sp->n_type & N_TYPE) == N_FN)
|
1993-06-12 14:58:17 +00:00
|
|
|
continue;
|
|
|
|
if (off >= sp->n_value) {
|
|
|
|
if (off - sp->n_value < diff) {
|
|
|
|
diff = off - sp->n_value;
|
|
|
|
symp = sp;
|
1994-09-27 03:34:58 +00:00
|
|
|
if (diff == 0) {
|
|
|
|
if (strategy == DB_STGY_PROC &&
|
|
|
|
sp->n_type == (N_TEXT|N_EXT))
|
|
|
|
break;
|
|
|
|
if (strategy == DB_STGY_ANY &&
|
|
|
|
(sp->n_type & N_EXT))
|
|
|
|
break;
|
|
|
|
}
|
1993-06-12 14:58:17 +00:00
|
|
|
}
|
|
|
|
else if (off - sp->n_value == diff) {
|
|
|
|
if (symp == 0)
|
|
|
|
symp = sp;
|
|
|
|
else if ((symp->n_type & N_EXT) == 0 &&
|
|
|
|
(sp->n_type & N_EXT) != 0)
|
|
|
|
symp = sp; /* pick the external symbol */
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (symp == 0) {
|
|
|
|
*diffp = off;
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
*diffp = diff;
|
|
|
|
}
|
|
|
|
return ((db_sym_t)symp);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Return the name and value for a symbol.
|
|
|
|
*/
|
|
|
|
void
|
1998-06-28 00:55:02 +00:00
|
|
|
X_db_symbol_values(symtab, sym, namep, valuep)
|
|
|
|
db_symtab_t *symtab;
|
1999-02-12 12:15:07 +00:00
|
|
|
c_db_sym_t sym;
|
1999-01-27 19:00:49 +00:00
|
|
|
const char **namep;
|
1993-06-12 14:58:17 +00:00
|
|
|
db_expr_t *valuep;
|
|
|
|
{
|
1999-02-12 12:44:19 +00:00
|
|
|
register const struct nlist *sp;
|
1993-06-12 14:58:17 +00:00
|
|
|
|
1999-02-12 12:44:19 +00:00
|
|
|
sp = (const struct nlist *)sym;
|
1993-06-12 14:58:17 +00:00
|
|
|
if (namep)
|
|
|
|
*namep = sp->n_un.n_name;
|
|
|
|
if (valuep)
|
|
|
|
*valuep = sp->n_value;
|
|
|
|
}
|
|
|
|
|
1994-01-03 07:54:10 +00:00
|
|
|
|
1993-06-12 14:58:17 +00:00
|
|
|
boolean_t
|
1994-01-03 07:54:10 +00:00
|
|
|
X_db_line_at_pc(symtab, cursym, filename, linenum, off)
|
|
|
|
db_symtab_t * symtab;
|
1999-02-12 12:15:07 +00:00
|
|
|
c_db_sym_t cursym;
|
1994-01-03 07:54:10 +00:00
|
|
|
char **filename;
|
|
|
|
int *linenum;
|
|
|
|
db_expr_t off;
|
1993-06-12 14:58:17 +00:00
|
|
|
{
|
1994-01-03 07:54:10 +00:00
|
|
|
register struct nlist *sp, *ep;
|
|
|
|
unsigned long sodiff = -1UL, lndiff = -1UL, ln = 0;
|
|
|
|
char *fname = NULL;
|
|
|
|
|
|
|
|
sp = (struct nlist *)symtab->start;
|
|
|
|
ep = (struct nlist *)symtab->end;
|
|
|
|
|
1995-01-25 21:40:47 +00:00
|
|
|
/*
|
|
|
|
* XXX - this used to remove "gcc_compiled.", but that is obsolete. We
|
|
|
|
* now remove unwanted names using symorder.
|
|
|
|
*/
|
|
|
|
#define NEWSRC(str) 0
|
1994-01-03 07:54:10 +00:00
|
|
|
|
|
|
|
for (; sp < ep; sp++) {
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Prevent bogus linenumbers in case module not compiled
|
|
|
|
* with debugging options
|
|
|
|
*/
|
|
|
|
#if 0
|
|
|
|
if (sp->n_value <= off && (off - sp->n_value) <= sodiff &&
|
|
|
|
NEWSRC(sp->n_un.n_name)) {
|
|
|
|
#endif
|
1995-05-30 08:16:23 +00:00
|
|
|
if ((sp->n_type & N_TYPE) == N_FN || NEWSRC(sp->n_un.n_name)) {
|
1994-01-03 07:54:10 +00:00
|
|
|
sodiff = lndiff = -1UL;
|
|
|
|
ln = 0;
|
|
|
|
fname = NULL;
|
|
|
|
}
|
|
|
|
|
1997-09-28 08:34:46 +00:00
|
|
|
if (sp->n_type == N_SO && *sp->n_un.n_name != '/') {
|
1994-01-03 07:54:10 +00:00
|
|
|
if (sp->n_value <= off && (off - sp->n_value) < sodiff) {
|
|
|
|
sodiff = off - sp->n_value;
|
|
|
|
fname = sp->n_un.n_name;
|
|
|
|
}
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (sp->n_type != N_SLINE)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
if (sp->n_value > off)
|
|
|
|
break;
|
|
|
|
|
|
|
|
if (off - sp->n_value < lndiff) {
|
|
|
|
lndiff = off - sp->n_value;
|
|
|
|
ln = sp->n_desc;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (fname != NULL && ln != 0) {
|
|
|
|
*filename = fname;
|
|
|
|
*linenum = ln;
|
|
|
|
return TRUE;
|
|
|
|
}
|
|
|
|
|
1993-06-12 14:58:17 +00:00
|
|
|
return (FALSE);
|
|
|
|
}
|
|
|
|
|
1994-01-03 07:54:10 +00:00
|
|
|
boolean_t
|
|
|
|
X_db_sym_numargs(symtab, cursym, nargp, argnamep)
|
|
|
|
db_symtab_t * symtab;
|
1999-01-27 23:45:44 +00:00
|
|
|
c_db_sym_t cursym;
|
1994-01-03 07:54:10 +00:00
|
|
|
int *nargp;
|
|
|
|
char **argnamep;
|
|
|
|
{
|
|
|
|
register struct nlist *sp, *ep;
|
|
|
|
u_long addr;
|
|
|
|
int maxnarg = *nargp, nargs = 0;
|
|
|
|
|
|
|
|
if (cursym == NULL)
|
|
|
|
return FALSE;
|
|
|
|
|
1999-02-12 12:44:19 +00:00
|
|
|
addr = ((const struct nlist *)cursym)->n_value;
|
1994-01-03 07:54:10 +00:00
|
|
|
sp = (struct nlist *)symtab->start;
|
|
|
|
ep = (struct nlist *)symtab->end;
|
|
|
|
|
|
|
|
for (; sp < ep; sp++) {
|
|
|
|
if (sp->n_type == N_FUN && sp->n_value == addr) {
|
|
|
|
while (++sp < ep && sp->n_type == N_PSYM) {
|
|
|
|
if (nargs >= maxnarg)
|
|
|
|
break;
|
|
|
|
nargs++;
|
|
|
|
*argnamep++ = sp->n_un.n_name?sp->n_un.n_name:"???";
|
|
|
|
{
|
|
|
|
/* XXX - remove trailers */
|
|
|
|
char *cp = *(argnamep-1);
|
|
|
|
while (*cp != '\0' && *cp != ':') cp++;
|
|
|
|
if (*cp == ':') *cp = '\0';
|
|
|
|
}
|
|
|
|
}
|
|
|
|
*nargp = nargs;
|
|
|
|
return TRUE;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return FALSE;
|
|
|
|
}
|
|
|
|
|
1993-06-12 14:58:17 +00:00
|
|
|
/*
|
|
|
|
* Initialization routine for a.out files.
|
|
|
|
*/
|
1993-11-25 01:38:01 +00:00
|
|
|
void
|
1997-04-01 14:31:06 +00:00
|
|
|
kdb_init()
|
1993-06-12 14:58:17 +00:00
|
|
|
{
|
1998-06-07 17:13:14 +00:00
|
|
|
#ifdef __i386__
|
1995-01-25 21:40:47 +00:00
|
|
|
if (bootinfo.bi_esymtab != bootinfo.bi_symtab)
|
|
|
|
X_db_sym_init((int *)bootinfo.bi_symtab,
|
|
|
|
(char *)((bootinfo.bi_esymtab + sizeof(int) - 1)
|
|
|
|
& ~(sizeof(int) - 1)),
|
|
|
|
"kernel");
|
1998-06-07 17:13:14 +00:00
|
|
|
#endif
|
1993-06-12 14:58:17 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
#if 0
|
|
|
|
/*
|
|
|
|
* Read symbol table from file.
|
|
|
|
* (should be somewhere else)
|
|
|
|
*/
|
|
|
|
#include <boot_ufs/file_io.h>
|
|
|
|
#include <vm/vm_kern.h>
|
|
|
|
|
|
|
|
read_symtab_from_file(fp, symtab_name)
|
|
|
|
struct file *fp;
|
|
|
|
char * symtab_name;
|
|
|
|
{
|
|
|
|
vm_size_t resid;
|
|
|
|
kern_return_t result;
|
|
|
|
vm_offset_t symoff;
|
|
|
|
vm_size_t symsize;
|
|
|
|
vm_offset_t stroff;
|
|
|
|
vm_size_t strsize;
|
|
|
|
vm_size_t table_size;
|
|
|
|
vm_offset_t symtab;
|
|
|
|
|
|
|
|
if (!get_symtab(fp, &symoff, &symsize)) {
|
|
|
|
boot_printf("[ error %d reading %s file header ]\n",
|
|
|
|
result, symtab_name);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
stroff = symoff + symsize;
|
|
|
|
result = read_file(fp, (vm_offset_t)stroff,
|
|
|
|
(vm_offset_t)&strsize, sizeof(strsize), &resid);
|
|
|
|
if (result || resid) {
|
|
|
|
boot_printf("[ no valid symbol table present for %s ]\n",
|
|
|
|
symtab_name);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
table_size = sizeof(int) + symsize + strsize;
|
|
|
|
table_size = (table_size + sizeof(int)-1) & ~(sizeof(int)-1);
|
|
|
|
|
|
|
|
symtab = kmem_alloc_wired(kernel_map, table_size);
|
|
|
|
|
|
|
|
*(int *)symtab = symsize;
|
|
|
|
|
|
|
|
result = read_file(fp, symoff,
|
|
|
|
symtab + sizeof(int), symsize, &resid);
|
|
|
|
if (result || resid) {
|
|
|
|
boot_printf("[ error %d reading %s symbol table ]\n",
|
|
|
|
result, symtab_name);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
result = read_file(fp, stroff,
|
|
|
|
symtab + sizeof(int) + symsize, strsize, &resid);
|
|
|
|
if (result || resid) {
|
|
|
|
boot_printf("[ error %d reading %s string table ]\n",
|
|
|
|
result, symtab_name);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
X_db_sym_init((int *)symtab,
|
|
|
|
(char *)(symtab + table_size),
|
|
|
|
symtab_name);
|
1995-05-30 08:16:23 +00:00
|
|
|
|
1993-06-12 14:58:17 +00:00
|
|
|
}
|
|
|
|
#endif
|
1998-10-09 23:29:44 +00:00
|
|
|
#endif
|