ldi.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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 2004 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/sysmacros.h>
#include <sys/dditypes.h>
#include <sys/ddi_impldefs.h>
#include <sys/ddipropdefs.h>
#include <sys/modctl.h>
#include <sys/file.h>
#include <sys/sunldi_impl.h>
#include <mdb/mdb_modapi.h>
#include <mdb/mdb_ks.h>
#include "ldi.h"
/*
* ldi handle walker structure
*/
typedef struct lh_walk {
struct ldi_handle **hash; /* current bucket pointer */
struct ldi_handle *lhp; /* ldi handle pointer */
size_t index; /* hash table index */
struct ldi_handle buf; /* buffer used for handle reads */
} lh_walk_t;
/*
* ldi identifier walker structure
*/
typedef struct li_walk {
struct ldi_ident **hash; /* current bucket pointer */
struct ldi_ident *lip; /* ldi handle pointer */
size_t index; /* hash table index */
struct ldi_ident buf; /* buffer used for ident reads */
} li_walk_t;
/*
* Options for ldi_handles dcmd
*/
#define LH_IDENTINFO 0x1
/*
* LDI walkers
*/
int
ldi_handle_walk_init(mdb_walk_state_t *wsp)
{
lh_walk_t *lhwp;
GElf_Sym sym;
/* get the address of the hash table */
if (mdb_lookup_by_name("ldi_handle_hash", &sym) == -1) {
mdb_warn("couldn't find ldi_handle_hash");
return (WALK_ERR);
}
lhwp = mdb_alloc(sizeof (lh_walk_t), UM_SLEEP|UM_GC);
lhwp->hash = (struct ldi_handle **)(uintptr_t)sym.st_value;
lhwp->index = 0;
/* get the address of the first element in the first hash bucket */
if ((mdb_vread(&lhwp->lhp, sizeof (struct ldi_handle *),
(uintptr_t)lhwp->hash)) == -1) {
mdb_warn("couldn't read ldi handle hash at %p", lhwp->hash);
return (WALK_ERR);
}
wsp->walk_addr = (uintptr_t)lhwp->lhp;
wsp->walk_data = lhwp;
return (WALK_NEXT);
}
int
ldi_handle_walk_step(mdb_walk_state_t *wsp)
{
lh_walk_t *lhwp = (lh_walk_t *)wsp->walk_data;
int status;
/* check if we need to go to the next hash bucket */
while (wsp->walk_addr == NULL) {
/* advance to the next bucket */
if (++(lhwp->index) >= LH_HASH_SZ)
return (WALK_DONE);
/* get handle address from the hash bucket */
if ((mdb_vread(&lhwp->lhp, sizeof (struct ldi_handle *),
(uintptr_t)(lhwp->hash + lhwp->index))) == -1) {
mdb_warn("couldn't read ldi handle hash at %p",
(uintptr_t)lhwp->hash + lhwp->index);
return (WALK_ERR);
}
wsp->walk_addr = (uintptr_t)lhwp->lhp;
}
/* invoke the walker callback for this hash element */
status = wsp->walk_callback(wsp->walk_addr, NULL, wsp->walk_cbdata);
if (status != WALK_NEXT)
return (status);
/* get a pointer to the next hash element */
if (mdb_vread(&lhwp->buf, sizeof (struct ldi_handle),
wsp->walk_addr) == -1) {
mdb_warn("couldn't read ldi handle at %p", wsp->walk_addr);
return (WALK_ERR);
}
wsp->walk_addr = (uintptr_t)lhwp->buf.lh_next;
return (WALK_NEXT);
}
int
ldi_ident_walk_init(mdb_walk_state_t *wsp)
{
li_walk_t *liwp;
GElf_Sym sym;
/* get the address of the hash table */
if (mdb_lookup_by_name("ldi_ident_hash", &sym) == -1) {
mdb_warn("couldn't find ldi_ident_hash");
return (WALK_ERR);
}
liwp = mdb_alloc(sizeof (li_walk_t), UM_SLEEP|UM_GC);
liwp->hash = (struct ldi_ident **)(uintptr_t)sym.st_value;
liwp->index = 0;
/* get the address of the first element in the first hash bucket */
if ((mdb_vread(&liwp->lip, sizeof (struct ldi_ident *),
(uintptr_t)liwp->hash)) == -1) {
mdb_warn("couldn't read ldi ident hash at %p", liwp->hash);
return (WALK_ERR);
}
wsp->walk_addr = (uintptr_t)liwp->lip;
wsp->walk_data = liwp;
return (WALK_NEXT);
}
int
ldi_ident_walk_step(mdb_walk_state_t *wsp)
{
li_walk_t *liwp = (li_walk_t *)wsp->walk_data;
int status;
/* check if we need to go to the next hash bucket */
while (wsp->walk_addr == NULL) {
/* advance to the next bucket */
if (++(liwp->index) >= LI_HASH_SZ)
return (WALK_DONE);
/* get handle address from the hash bucket */
if ((mdb_vread(&liwp->lip, sizeof (struct ldi_ident *),
(uintptr_t)(liwp->hash + liwp->index))) == -1) {
mdb_warn("couldn't read ldi ident hash at %p",
(uintptr_t)liwp->hash + liwp->index);
return (WALK_ERR);
}
wsp->walk_addr = (uintptr_t)liwp->lip;
}
/* invoke the walker callback for this hash element */
status = wsp->walk_callback(wsp->walk_addr, NULL, wsp->walk_cbdata);
if (status != WALK_NEXT)
return (status);
/* get a pointer to the next hash element */
if (mdb_vread(&liwp->buf, sizeof (struct ldi_ident),
wsp->walk_addr) == -1) {
mdb_warn("couldn't read ldi ident at %p", wsp->walk_addr);
return (WALK_ERR);
}
wsp->walk_addr = (uintptr_t)liwp->buf.li_next;
return (WALK_NEXT);
}
/*
* LDI dcmds
*/
static void
ldi_ident_header(int start, int refs)
{
if (start) {
mdb_printf("%-?s ", "IDENT");
} else {
mdb_printf("%?s ", "IDENT");
}
if (refs)
mdb_printf("%4s ", "REFS");
mdb_printf("%?s %5s %5s %s\n", "DIP", "MINOR", "MODID", "MODULE NAME");
}
static int
ldi_ident_print(uintptr_t addr, int refs)
{
struct ldi_ident li;
/* read the ldi ident */
if (mdb_vread(&li, sizeof (struct ldi_ident), addr) == -1) {
mdb_warn("couldn't read ldi ident at %p", addr);
return (1);
}
/* display the ident address */
mdb_printf("%0?p ", addr);
/* display the ref count */
if (refs)
mdb_printf("%4u ", li.li_ref);
/* display the dip (if any) */
if (li.li_dip != NULL) {
mdb_printf("%0?p ", li.li_dip);
} else {
mdb_printf("%?s ", "-");
}
/* display the minor node (if any) */
if (li.li_dev != DDI_DEV_T_NONE) {
mdb_printf("%5u ", getminor(li.li_dev));
} else {
mdb_printf("%5s ", "-");
}
/* display the module info */
mdb_printf("%5d %s\n", li.li_modid, li.li_modname);
return (0);
}
int
ldi_ident(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
{
int start = 1;
int refs = 1;
/* Determine if there is an ldi identifier address */
if (!(flags & DCMD_ADDRSPEC)) {
if (mdb_walk_dcmd("ldi_ident", "ldi_ident",
argc, argv) == -1) {
mdb_warn("can't walk ldi idents");
return (DCMD_ERR);
}
return (DCMD_OK);
}
/* display the header line */
if (DCMD_HDRSPEC(flags))
ldi_ident_header(start, refs);
/* display the ldi ident */
if (ldi_ident_print(addr, refs))
return (DCMD_ERR);
return (DCMD_OK);
}
static void
ldi_handle_header(int refs, int ident) {
mdb_printf("%-?s ", "HANDLE");
if (refs)
mdb_printf("%4s ", "REFS");
mdb_printf("%?s %10s %5s %?s ", "VNODE", "DRV", "MINOR", "EVENTS");
if (!ident) {
mdb_printf("%?s\n", "IDENT");
} else {
ldi_ident_header(0, 0);
}
}
static int
ldi_handle_print(uintptr_t addr, int ident, int refs)
{
vnode_t vnode;
struct ldi_handle lh;
const char *name;
/* read in the ldi handle */
if (mdb_vread(&lh, sizeof (struct ldi_handle), addr) == -1) {
mdb_warn("couldn't read ldi handle at %p", addr);
return (DCMD_ERR);
}
/* display the handle address */
mdb_printf("%0?p ", addr);
/* display the ref count */
if (refs)
mdb_printf("%4u ", lh.lh_ref);
/* display the vnode */
mdb_printf("%0?p ", lh.lh_vp);
/* read in the vnode associated with the handle */
addr = (uintptr_t)lh.lh_vp;
if (mdb_vread(&vnode, sizeof (vnode_t), addr) == -1) {
mdb_warn("couldn't read vnode at %p", addr);
return (1);
}
/* display the driver name */
if ((name = mdb_major_to_name(getmajor(vnode.v_rdev))) == NULL) {
mdb_warn("failed to convert major number to name\n");
return (1);
}
mdb_printf("%10s ", name);
/* display the minor number */
mdb_printf("%5d ", getminor(vnode.v_rdev));
/* display the event pointer (if any) */
if (lh.lh_events != NULL) {
mdb_printf("%0?p ", lh.lh_events);
} else {
mdb_printf("%?s ", "-");
}
if (!ident) {
/* display the ident address */
mdb_printf("%0?p\n", lh.lh_ident);
return (0);
}
/* display the entire ident */
return (ldi_ident_print((uintptr_t)lh.lh_ident, refs));
}
int
ldi_handle(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
{
int ident = 0;
int refs = 1;
if (mdb_getopts(argc, argv,
'i', MDB_OPT_SETBITS, TRUE, &ident) != argc)
return (DCMD_USAGE);
if (ident)
refs = 0;
/* Determine if there is an ldi handle address */
if (!(flags & DCMD_ADDRSPEC)) {
if (mdb_walk_dcmd("ldi_handle", "ldi_handle",
argc, argv) == -1) {
mdb_warn("can't walk ldi handles");
return (DCMD_ERR);
} return (DCMD_OK);
}
/* display the header line */
if (DCMD_HDRSPEC(flags))
ldi_handle_header(refs, ident);
/* display the ldi handle */
if (ldi_handle_print(addr, ident, refs))
return (DCMD_ERR);
return (DCMD_OK);
}
void
ldi_ident_help(void)
{
mdb_printf("Displays an ldi identifier.\n"
"Without the address of an \"ldi_ident_t\", "
"print all identifiers.\n"
"With an address, print the specified identifier.\n");
}
void
ldi_handle_help(void)
{
mdb_printf("Displays an ldi handle.\n"
"Without the address of an \"ldi_handle_t\", "
"print all handles.\n"
"With an address, print the specified handle.\n\n"
"Switches:\n"
" -i print the module identifier information\n");
}