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/* $OpenBSD: db_machdep.h,v 1.24 2003/10/05 20:23:53 miod Exp $ */
/*
* Mach Operating System
* Copyright (c) 1993-1991 Carnegie Mellon University
* Copyright (c) 1991 OMRON Corporation
* 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 AND OMRON ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON AND OMRON DISCLAIM 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.
*/
/*
* Machine-dependent defined for the new kernel debugger
*/
#ifndef _M88K_DB_MACHDEP_H_
#define _M88K_DB_MACHDEP_H_
/* trap numbers used by ddb */
#define DDB_ENTRY_BKPT_NO 130
#define DDB_ENTRY_TRACE_NO 131
#define DDB_ENTRY_TRAP_NO 132
#ifndef _LOCORE
#include <machine/pcb.h> /* m88100_saved_state */
#include <machine/trap.h>
#include <uvm/uvm_param.h>
/*
* The low two bits of sxip, snip, sfip have valid bits
* in them that need to masked to get the correct addresses
*/
#define PC_REGS(regs) cputyp == CPU_88110 ? (regs->exip & ~3) :\
((regs->sxip & 2) ? regs->sxip & ~3 : \
(regs->snip & 2 ? regs->snip & ~3 : regs->sfip & ~3))
/* inst_return(ins) - is the instruction a function call return.
* Not mutually exclusive with inst_branch. Should be a jmp r1. */
#define inst_return(I) (((I)&0xfffffbffU) == 0xf400c001U ? TRUE : FALSE)
/*
* inst_call - function call predicate: is the instruction a function call.
* Could be either bsr or jsr
*/
#define inst_call(I) ({ unsigned i = (I); \
((((i) & 0xf8000000U) == 0xc8000000U || /*bsr*/ \
((i) & 0xfffffbe0U) == 0xf400c800U) /*jsr*/ \
? TRUE : FALSE) \
;})
#ifdef DDB
/*
* This is a hack so that mc88100 can use software single step
* and mc88110 can use the wonderful hardware single step
* feature. XXX smurph
*/
#define INTERNAL_SSTEP /* Use local Single Step routines */
#define BKPT_SIZE (4) /* number of bytes in bkpt inst. */
#define BKPT_INST (0xF000D000 | DDB_ENTRY_BKPT_NO) /* tb0, 0,r0, vector 130 */
#define BKPT_SET(inst) (BKPT_INST)
/* Entry trap for the debugger - used for inline assembly breaks*/
#define ENTRY_ASM "tb0 0, r0, 132"
typedef vaddr_t db_addr_t;
typedef int db_expr_t;
typedef struct m88100_saved_state db_regs_t;
extern db_regs_t ddb_regs; /* register state */
#define DDB_REGS (&ddb_regs)
extern int db_noisy;
extern int quiet_db_read_bytes;
unsigned inst_load(unsigned);
unsigned inst_store(unsigned);
boolean_t inst_branch(unsigned);
db_addr_t next_instr_address(db_addr_t, unsigned);
db_addr_t branch_taken(u_int, db_addr_t, db_expr_t (*)(db_regs_t *, int),
db_regs_t *);
int ddb_break_trap(int type, db_regs_t *eframe);
int ddb_entry_trap(int level, db_regs_t *eframe);
/* breakpoint/watchpoint foo */
#define IS_BREAKPOINT_TRAP(type,code) ((type)==T_KDB_BREAK)
#if defined(T_WATCHPOINT)
#define IS_WATCHPOINT_TRAP(type,code) ((type)==T_KDB_WATCH)
#else
#define IS_WATCHPOINT_TRAP(type,code) 0
#endif /* T_WATCHPOINT */
/* we don't want coff support */
#define DB_NO_COFF 1
#ifdef INTERNAL_SSTEP
extern register_t getreg_val(db_regs_t *, int);
void db_set_single_step(db_regs_t *);
void db_clear_single_step(db_regs_t *);
#else
/* need software single step */
#define SOFTWARE_SSTEP 1 /* we need this for mc88100 */
#endif
/*
* Debugger can get to any address space
*/
#define DB_ACCESS_LEVEL DB_ACCESS_ANY
#define DB_VALID_KERN_ADDR(addr) (!badaddr((void *)(addr), 1))
#define DB_VALID_ADDRESS(addr,user) \
(user ? db_check_user_addr(addr) : DB_VALID_KERN_ADDR(addr))
/* instruction type checking - others are implemented in db_sstep.c */
#define inst_trap_return(ins) ((ins) == 0xf400fc00U)
/* don't need to load symbols */
#define DB_SYMBOLS_PRELOADED 1
/* machine specific commands have been added to ddb */
#define DB_MACHINE_COMMANDS 1
/*
* This routine should return true for instructions that result in unconditonal
* transfers of the flow of control. (Unconditional Jumps, subroutine calls,
* subroutine returns, etc).
*
* Trap and return from trap should not be listed here.
*/
#define inst_unconditional_flow_transfer(I) ({ unsigned i = (I); \
((((i) & 0xf0000000U) == 0xc0000000U || /* br, bsr */ \
((i) & 0xfffff3e0U) == 0xf400c000U) /* jmp, jsr */ \
? TRUE: FALSE) \
;})
/* Return true if the instruction has a delay slot. */
#define db_branch_is_delayed(I) inst_delayed(I)
#define db_printf_enter db_printing
int m88k_print_instruction(unsigned iadr, long inst);
#endif /* DDB */
#endif /* _LOCORE */
#endif /* _M88K_DB_MACHDEP_H_ */
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