intel/mdb/kvm_isadep.c

	kvm_isadep.c revision 843e19887f64dde75055cf8842fc4db2171eff45
/*
 * 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"

/*
 * Libkvm Kernel Target Intel component
 *
 * This file provides the Intel-dependent portion of the libkvm kernel target.
 * For more details on the implementation refer to mdb_kvm.c.
 */

#include <mdb/mdb_target_impl.h>
#include <mdb/mdb_kreg_impl.h>
#include <mdb/mdb_errno.h>
#include <mdb/mdb_err.h>
#include <mdb/mdb_kvm.h>
#include <mdb/mdb_ks.h>
#include <mdb/mdb.h>
#include <mdb/kvm_isadep.h>

#include <sys/cpuvar.h>
#include <sys/privmregs.h>

int
kt_getareg(mdb_tgt_t *t, mdb_tgt_tid_t tid,
    const char *rname, mdb_tgt_reg_t *rp)
{
    const mdb_tgt_regdesc_t *rdp;
    kt_data_t *kt = t->t_data;

    if (tid != kt->k_tid)
        return (set_errno(EMDB_NOREGS));

    for (rdp = kt->k_rds; rdp->rd_name != NULL; rdp++) {
        if (strcmp(rname, rdp->rd_name) == 0) {
            *rp = kt->k_regs->kregs[rdp->rd_num];
            return (0);
        }
    }

    return (set_errno(EMDB_BADREG));
}

int
kt_putareg(mdb_tgt_t *t, mdb_tgt_tid_t tid, const char *rname, mdb_tgt_reg_t r)
{
    const mdb_tgt_regdesc_t *rdp;
    kt_data_t *kt = t->t_data;

    if (tid != kt->k_tid)
        return (set_errno(EMDB_NOREGS));

    for (rdp = kt->k_rds; rdp->rd_name != NULL; rdp++) {
        if (strcmp(rname, rdp->rd_name) == 0) {
            kt->k_regs->kregs[rdp->rd_num] = (kreg_t)r;
            return (0);
        }
    }

    return (set_errno(EMDB_BADREG));
}

int
kt_kvmregs(mdb_tgt_t *t, uint_t cpuid, mdb_tgt_gregset_t *kregs)
{
    kt_data_t *kt = t->t_data;
    privmregs_t mregs;
    int ret;

    if ((ret = kt->k_kb_ops->kb_getmregs(kt->k_cookie, cpuid, &mregs)) != 0)
        return (ret);

    kt_regs_to_kregs(&mregs.pm_gregs, kregs);
    return (0);
}

static int
kt_cpu2cpuid(uintptr_t cpup)
{
    cpu_t cpu;

    if (mdb_vread(&cpu, sizeof (cpu_t), cpup) != sizeof (cpu_t))
        return (-1);

    return (cpu.cpu_id);
}

int
kt_cpustack(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
{
    mdb_tgt_t *t = mdb.m_target;
    mdb_tgt_gregset_t regs;
    intptr_t cpuid = 0;
    uint_t verbose = 0;
    int i;

    if (flags & DCMD_ADDRSPEC) {
        if ((cpuid = kt_cpu2cpuid(addr)) < 0) {
            (void) set_errno(EMDB_NOMAP);
            mdb_warn("failed to find cpuid for cpu at %p", addr);
            return (DCMD_ERR);
        }
        flags &= ~DCMD_ADDRSPEC;
    }


    i = mdb_getopts(argc, argv,
        'c', MDB_OPT_UINTPTR, &cpuid,
        'v', MDB_OPT_SETBITS, 1, &verbose,
        NULL);

    argc -= i;
    argv += i;

    if (kt_kvmregs(t, cpuid, &regs) != 0) {
        mdb_warn("failed to get regs for cpu %d\n", cpuid);
        return (DCMD_ERR);
    }

    /*
     * Tell the stack walker that we have regs.
     */
    flags |= DCMD_ADDRSPEC;
    addr = regs.kregs[KREG_FP];

    if (verbose)
        return (kt_stackv(addr, flags, argc, argv));
    else
        return (kt_stack(addr, flags, argc, argv));
}

/*ARGSUSED*/
int
kt_cpuregs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
{
    mdb_tgt_t *t = mdb.m_target;
    mdb_tgt_gregset_t regs;
    intptr_t cpuid = 0;
    int i;

    if (flags & DCMD_ADDRSPEC) {
        if (argc != 0)
            return (DCMD_USAGE);
        if ((cpuid = kt_cpu2cpuid(addr)) < 0) {
            (void) set_errno(EMDB_NOMAP);
            mdb_warn("failed to find cpuid for cpu at %p", addr);
            return (DCMD_ERR);
        }
    }


    i = mdb_getopts(argc, argv,
        'c', MDB_OPT_UINTPTR, &cpuid,
        NULL);

    argc -= i;
    argv += i;

    if (argc != 0)
        return (DCMD_USAGE);

    if (kt_kvmregs(t, cpuid, &regs) != 0) {
        mdb_warn("failed to get regs for cpu %d\n", cpuid);
        return (DCMD_ERR);
    }

    return (kt_regs((uintptr_t)&regs, flags, argc, argv));
}