0bf495e561
segments can still cause panics. Their pc is converted to 0 and 0 is only checked for in one place before use.
120 lines
3.9 KiB
C
120 lines
3.9 KiB
C
/*
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* Mach Operating System
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* Copyright (c) 1991,1990 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie Mellon
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* the rights to redistribute these changes.
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*
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* $Id: db_machdep.h,v 1.5 1994/10/02 19:36:30 phk Exp $
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*/
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#ifndef _I386_DB_MACHDEP_H_
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#define _I386_DB_MACHDEP_H_
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/*
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* Machine-dependent defines for new kernel debugger.
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*/
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/* #include <mach/i386/vm_types.h> */
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/* #include <mach/i386/vm_param.h> */
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#include <vm/vm_prot.h>
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#include <vm/vm_param.h>
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#include <vm/vm_inherit.h>
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#include <vm/lock.h>
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/* #include <i386/thread.h> */ /* for thread_status */
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#include <machine/frame.h> /* for struct trapframe */
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/* #include <i386/eflags.h> */
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#include <machine/psl.h>
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/* #include <i386/trap.h> */
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#include <machine/trap.h>
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#define i386_saved_state trapframe
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typedef vm_offset_t db_addr_t; /* address - unsigned */
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typedef int db_expr_t; /* expression - signed */
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typedef struct i386_saved_state db_regs_t;
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extern db_regs_t ddb_regs; /* register state */
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#define DDB_REGS (&ddb_regs)
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#define PC_REGS(regs) (((regs)->tf_cs & 0xfffc) == 0x08 \
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? (db_addr_t)(regs)->tf_eip : 0)
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#define BKPT_INST 0xcc /* breakpoint instruction */
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#define BKPT_SIZE (1) /* size of breakpoint inst */
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#define BKPT_SET(inst) (BKPT_INST)
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#define FIXUP_PC_AFTER_BREAK ddb_regs.tf_eip -= 1;
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#define db_clear_single_step(regs) ((regs)->tf_eflags &= ~PSL_T)
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#define db_set_single_step(regs) ((regs)->tf_eflags |= PSL_T)
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/* #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_INT3) */
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/* #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_WATCHPOINT) */
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/* using the FreeBSD values, rather than the Mach ones: */
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#define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT)
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#define IS_WATCHPOINT_TRAP(type, code) ((type) == T_KDBTRAP)
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#define I_CALL 0xe8
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#define I_CALLI 0xff
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#define I_RET 0xc3
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#define I_IRET 0xcf
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#define inst_trap_return(ins) (((ins)&0xff) == I_IRET)
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#define inst_return(ins) (((ins)&0xff) == I_RET)
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#define inst_call(ins) (((ins)&0xff) == I_CALL || \
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(((ins)&0xff) == I_CALLI && \
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((ins)&0x3800) == 0x1000))
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#define inst_load(ins) 0
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#define inst_store(ins) 0
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/* access capability and access macros */
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#define DB_ACCESS_LEVEL 2 /* access any space */
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#define DB_CHECK_ACCESS(addr,size,task) \
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db_check_access(addr,size,task)
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#define DB_PHYS_EQ(task1,addr1,task2,addr2) \
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db_phys_eq(task1,addr1,task2,addr2)
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#define DB_VALID_KERN_ADDR(addr) \
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((addr) >= VM_MIN_KERNEL_ADDRESS && \
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(addr) < VM_MAX_KERNEL_ADDRESS)
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#define DB_VALID_ADDRESS(addr,user) \
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((!(user) && DB_VALID_KERN_ADDR(addr)) || \
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((user) && (addr) < VM_MIN_KERNEL_ADDRESS))
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boolean_t db_check_access(/* vm_offset_t, int, task_t */);
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boolean_t db_phys_eq(/* task_t, vm_offset_t, task_t, vm_offset_t */);
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/* macros for printing OS server dependent task name */
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#define DB_TASK_NAME(task) db_task_name(task)
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#define DB_TASK_NAME_TITLE "COMMAND "
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#define DB_TASK_NAME_LEN 23
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#define DB_NULL_TASK_NAME "? "
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void db_task_name(/* task_t */);
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/* macro for checking if a thread has used floating-point */
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#define db_thread_fp_used(thread) ((thread)->pcb->ims.ifps != 0)
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#endif /* _I386_DB_MACHDEP_H_ */
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