usr/src/sys.386bsd/i386/include/db_machdep.h

/*
 * 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 "AS IS"
 * 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 Mellon
 * the rights to redistribute these changes.
 */
/*
 * HISTORY
 * $Log:        db_machdep.h,v $
 * Revision 2.8  92/02/19  15:07:56  elf
 *      Added db_thread_fp_used.
 *      [92/02/19            rpd]
 *
 * Revision 2.7  91/10/09  16:06:28  af
 *       Revision 2.6.3.1  91/10/05  13:10:32  jeffreyh
 *              Added access and task name macros.
 *              [91/08/29            tak]
 *
 * Revision 2.6.3.1  91/10/05  13:10:32  jeffreyh
 *      Added access and task name macros.
 *      [91/08/29            tak]
 *
 * Revision 2.6  91/05/14  16:05:58  mrt
 *      Correcting copyright
 *
 * Revision 2.5  91/02/05  17:11:17  mrt
 *      Changed to new Mach copyright
 *      [91/02/01  17:31:24  mrt]
 *
 * Revision 2.4  91/01/08  15:10:16  rpd
 *      Added dummy inst_load/inst_store macros.
 *      [90/12/11            rpd]
 *
 * Revision 2.3  90/10/25  14:44:49  rwd
 *      Added watchpoint support.
 *      [90/10/18            rpd]
 *
 * Revision 2.2  90/08/27  21:56:15  dbg
 *      Created.
 *      [90/07/25            dbg]
 *
 */

#ifndef _I386_DB_MACHDEP_H_
#define _I386_DB_MACHDEP_H_

/*
 * Machine-dependent defines for new kernel debugger.
 */


/* #include <mach/i386/vm_types.h> */
/* #include <mach/i386/vm_param.h> */
#include <vm/vm_prot.h>
#include <vm/vm_param.h>
#include <vm/vm_inherit.h>
#include <vm/lock.h>
/* #include <i386/thread.h> */          /* for thread_status */
#include <machine/frame.h>      /* for struct trapframe */
/* #include <i386/eflags.h> */
#include <machine/eflags.h>             /* from Mach... */
/* #include <i386/trap.h> */
#include <machine/trap.h>

#define i386_saved_state trapframe
/* end of mangling */

typedef vm_offset_t     db_addr_t;      /* address - unsigned */
typedef int             db_expr_t;      /* expression - signed */

typedef struct i386_saved_state db_regs_t;
db_regs_t       ddb_regs;       /* register state */
#define DDB_REGS        (&ddb_regs)

#define PC_REGS(regs)   ((db_addr_t)(regs)->tf_eip)

#define BKPT_INST       0xcc            /* breakpoint instruction */
#define BKPT_SIZE       (1)             /* size of breakpoint inst */
#define BKPT_SET(inst)  (BKPT_INST)

#define FIXUP_PC_AFTER_BREAK    ddb_regs.tf_eip -= 1;

#define db_clear_single_step(regs)      ((regs)->tf_eflags &= ~EFL_TF)
#define db_set_single_step(regs)        ((regs)->tf_eflags |=  EFL_TF)

/* #define      IS_BREAKPOINT_TRAP(type, code)  ((type) == T_INT3) */
/* #define IS_WATCHPOINT_TRAP(type, code)       ((type) == T_WATCHPOINT) */
/* using the 386bsd values, rather than the Mach ones: */
#define IS_BREAKPOINT_TRAP(type, code)  ((type) == T_BPTFLT)
#define IS_WATCHPOINT_TRAP(type, code)  ((type) == T_KDBTRAP)

#define I_CALL          0xe8
#define I_CALLI         0xff
#define I_RET           0xc3
#define I_IRET          0xcf

#define inst_trap_return(ins)   (((ins)&0xff) == I_IRET)
#define inst_return(ins)        (((ins)&0xff) == I_RET)
#define inst_call(ins)          (((ins)&0xff) == I_CALL || \
                                 (((ins)&0xff) == I_CALLI && \
                                  ((ins)&0x3800) == 0x1000))
#define inst_load(ins)          0
#define inst_store(ins)         0

/* access capability and access macros */

#define DB_ACCESS_LEVEL         2       /* access any space */
#define DB_CHECK_ACCESS(addr,size,task)                         \
        db_check_access(addr,size,task)
#define DB_PHYS_EQ(task1,addr1,task2,addr2)                     \
        db_phys_eq(task1,addr1,task2,addr2)
#define DB_VALID_KERN_ADDR(addr)                                \
        ((addr) >= VM_MIN_KERNEL_ADDRESS &&                     \
         (addr) < VM_MAX_KERNEL_ADDRESS)
#define DB_VALID_ADDRESS(addr,user)                             \
        ((!(user) && DB_VALID_KERN_ADDR(addr)) ||               \
         ((user) && (addr) < VM_MIN_KERNEL_ADDRESS))

boolean_t       db_check_access(/* vm_offset_t, int, task_t */);
boolean_t       db_phys_eq(/* task_t, vm_offset_t, task_t, vm_offset_t */);

/* macros for printing OS server dependent task name */

#define DB_TASK_NAME(task)      db_task_name(task)
#define DB_TASK_NAME_TITLE      "COMMAND                "
#define DB_TASK_NAME_LEN        23
#define DB_NULL_TASK_NAME       "?                      "

void            db_task_name(/* task_t */);

/* macro for checking if a thread has used floating-point */

#define db_thread_fp_used(thread)       ((thread)->pcb->ims.ifps != 0)

#endif  /* _I386_DB_MACHDEP_H_ */