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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <sys/cmn_err.h>
#include <sys/modctl.h>
#include <sys/kobj.h>
#include <sys/kobj_impl.h>
#include <sys/promif.h>
#include <sys/promimpl.h>
#include <sys/reboot.h>
#include <sys/bootconf.h>
#include <sys/systm.h> /* strstr */
#include <sys/machsystm.h> /* obpdebug */
#define FDEBUGFILE "misc/forthdebug"
#define INSTALL_DBP "kdbg-words dbp-install previous"
#define SYMBOL_END "END OF SYMBOL"
#ifdef DEBUG
static int forthdebug = 1;
#else
static int forthdebug = 0;
#endif /* DEBUG */
static int forthdebug_dbp = 0;
int forthdebug_supported = 1;
int modreloc_flag = KOBJ_RELOCATED;
/*
* basic_sym[] holds all essential symbols the symbol lookup
* service requires. Forthdebug stub names appears in forthdebug
* as place holders. They are replaced with the value of corresponding
* kernel variables. For example, "modules-val-here" in forthdebug
* is replaced with the address of "modules" variable.
*
* To improve performance, we mandate the records be in the same
* sequence they appear in forthdebug, i.e "modules-val-here" is
* ahead of "primaries-v-here" in misc/forthdebug.
*
* The last record must be all 0 to indicate end of the array.
*/
static char *basic_sym[] = {
/* kernel variable */ /* forthdebug stub name - must be 16 chars */
"modules", "modules-val-here",
"primaries", "primaries-v-here",
"modreloc_flag", "modreloc-flagval",
0, 0
};
static void fdbp_hook() {} /* null function for defer breakpoint operation */
/*ARGSUSED*/
static void fdbp_snoop(unsigned int i, struct modctl *modctl_p)
{
promif_preprom();
fdbp_hook();
promif_postprom();
}
static kobj_notify_list_t knl_load = {
fdbp_snoop, KOBJ_NOTIFY_MODLOADED, 0, 0
};
static kobj_notify_list_t knl_unload = {
fdbp_snoop, KOBJ_NOTIFY_MODUNLOADING, 0, 0
};
void
forthdebug_init(void)
{
char *fth_buf, *buf_p;
ulong_t modsym;
int i, sz;
uint64_t fsz;
struct _buf *file;
if (!forthdebug_supported) {
(void) modload("misc", "obpsym");
return;
}
forthdebug_dbp |= boothowto & RB_FORTHDEBUGDBP;
forthdebug |= (boothowto & RB_FORTHDEBUG) | forthdebug_dbp;
file = kobj_open_path(FDEBUGFILE, 1, 1);
if (file == (struct _buf *)-1) {
cmn_err(CE_CONT, "Can't open %s\n", FDEBUGFILE);
return;
}
i = kobj_get_filesize(file, &fsz);
if (i || !fsz) {
cmn_err(CE_CONT, "Can't stat %s stat=%x sz=%llx\n",
FDEBUGFILE, i, (long long)fsz);
goto err_stat;
}
fth_buf = (char *)kobj_zalloc(fsz + 1, KM_SLEEP);
sz = kobj_read_file(file, fth_buf, fsz, 0); /* entire file */
if (sz < 0) {
cmn_err(CE_CONT, "Error(%d) reading %s\n", sz, FDEBUGFILE);
goto done;
}
ASSERT(fsz == sz);
fth_buf[sz] = 0;
/* resolve all essential symbols in basic_sym[] */
for (i = 0; basic_sym[i]; i += 2) {
buf_p = strstr(fth_buf, basic_sym[i + 1]);
modsym = kobj_getsymvalue(basic_sym[i], 0);
if (buf_p && modsym) {
(void) sprintf(buf_p, "%16p", (void *)modsym);
buf_p += 16;
*buf_p++ = ' '; /* erase null char by sprintf */
} else {
cmn_err(CE_CONT,
"forthdebug_init: No %s symbol(%p,%p), aborted\n",
basic_sym[i], (void *)buf_p, (void *)modsym);
goto done;
}
}
if (!forthdebug) { /* symbol lookup services only */
if (!(buf_p = strstr(fth_buf, SYMBOL_END))) {
cmn_err(CE_CONT, "No %s in forthdebug\n", SYMBOL_END);
goto done;
}
*buf_p = '\0';
#ifdef DEBUG
cmn_err(CE_CONT, "symbol lookup service (%ld bytes)\n",
(long)(buf_p - fth_buf));
#endif /* DEBUG */
prom_interpret(fth_buf, 0, 0, 0, 0, 0);
goto done;
}
cmn_err(CE_CONT, "%s (%d bytes) ", FDEBUGFILE, sz);
prom_interpret(fth_buf, 0, 0, 0, 0, 0);
cmn_err(CE_CONT, "loaded\n");
obpdebug = 1; /* backward compatibility */
if (forthdebug_dbp) {
#ifdef NO_KOBJ_NOTIFY
modsym = kobj_getsymvalue("kobj_notify_add", 0);
(void) ((int (*)(kobj_notify_list_t *))modsym)(&knl_load);
(void) ((int (*)(kobj_notify_list_t *))modsym)(&knl_unload);
#else
(void) kobj_notify_add(&knl_load);
(void) kobj_notify_add(&knl_unload);
#endif /* NO_KOBJ_NOTIFY */
prom_interpret(INSTALL_DBP, 0, 0, 0, 0, 0);
debug_enter("Defer breakpoint enabled. Add breakpoints, then");
}
done:
kobj_free(fth_buf, fsz + 1);
err_stat:
kobj_close_file(file);
if (boothowto & RB_HALT)
debug_enter("forthdebug: halt flag (-h) is set.\n");
}
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