/*-
 * 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.
 */

#include <sys/cdefs.h>
/*
 * Interface to new debugger.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kdb.h>
#include <sys/pcpu.h>

#include <machine/cpufunc.h>
#include <machine/md_var.h>
#include <machine/specialreg.h>

#include <ddb/ddb.h>

/*
 * Read bytes from kernel address space for debugger.
 */
int
db_read_bytes(vm_offset_t addr, size_t size, char *data)
{
        jmp_buf jb;
        void *prev_jb;
        char *src;
        int ret;

        prev_jb = kdb_jmpbuf(jb);
        ret = setjmp(jb);
        if (ret == 0) {
                src = (char *)addr;
                while (size-- > 0)
                        *data++ = *src++;
        }
        (void)kdb_jmpbuf(prev_jb);
        return (ret);
}

/*
 * Write bytes to kernel address space for debugger.
 * We need to disable write protection temporarily so we can write
 * things (such as break points) that might be in write-protected
 * memory.
 */
int
db_write_bytes(vm_offset_t addr, size_t size, char *data)
{
        jmp_buf jb;
        void *prev_jb;
        char *dst;
        bool old_wp;
        int ret;

        old_wp = false;
        prev_jb = kdb_jmpbuf(jb);
        ret = setjmp(jb);
        if (ret == 0) {
                old_wp = disable_wp();
                dst = (char *)addr;
                while (size-- > 0)
                        *dst++ = *data++;
        }
        restore_wp(old_wp);
        (void)kdb_jmpbuf(prev_jb);
        return (ret);
}

void
db_show_mdpcpu(struct pcpu *pc)
{

        db_printf("self         = %p\n", pc->pc_prvspace);
        db_printf("curpmap      = %p\n", pc->pc_curpmap);
        db_printf("tssp         = %p\n", pc->pc_tssp);
        db_printf("rsp0         = 0x%lx\n", pc->pc_rsp0);
        db_printf("kcr3         = 0x%lx\n", pc->pc_kcr3);
        db_printf("ucr3         = 0x%lx\n", pc->pc_ucr3);
        db_printf("scr3         = 0x%lx\n", pc->pc_saved_ucr3);
        db_printf("gs32p        = %p\n", pc->pc_gs32p);
        db_printf("ldt          = %p\n", pc->pc_ldt);
        db_printf("tss          = %p\n", pc->pc_tss);
}