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db_machdep.h revision 1.19 
      1 /*	$NetBSD: db_machdep.h,v 1.19 2014/03/05 16:33:33 matt Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1996 Scott K Stevens
      5  *
      6  * Mach Operating System
      7  * Copyright (c) 1991,1990 Carnegie Mellon University
      8  * All Rights Reserved.
      9  *
     10  * Permission to use, copy, modify and distribute this software and its
     11  * documentation is hereby granted, provided that both the copyright
     12  * notice and this permission notice appear in all copies of the
     13  * software, derivative works or modified versions, and any portions
     14  * thereof, and that both notices appear in supporting documentation.
     15  *
     16  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     17  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
     18  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     19  *
     20  * Carnegie Mellon requests users of this software to return to
     21  *
     22  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     23  *  School of Computer Science
     24  *  Carnegie Mellon University
     25  *  Pittsburgh PA 15213-3890
     26  *
     27  * any improvements or extensions that they make and grant Carnegie Mellon
     28  * the rights to redistribute these changes.
     29  */
     30 
     31 #ifndef	_ARM_DB_MACHDEP_H_
     32 #define	_ARM_DB_MACHDEP_H_
     33 
     34 /*
     35  * Machine-dependent defines for new kernel debugger.
     36  */
     37 #include <sys/types.h>
     38 #include <uvm/uvm_extern.h>
     39 #include <arm/armreg.h>
     40 #include <machine/frame.h>
     41 #include <machine/trap.h>
     42 
     43 /* end of mangling */
     44 
     45 typedef	vaddr_t		db_addr_t;	/* address - unsigned */
     46 #define	DDB_EXPR_FMT	"l"		/* expression is long */
     47 typedef	long		db_expr_t;	/* expression - signed */
     48 
     49 typedef trapframe_t db_regs_t;
     50 
     51 extern db_regs_t	ddb_regs;	/* register state */
     52 #define	DDB_REGS	(&ddb_regs)
     53 
     54 #ifdef __PROG26
     55 #define	PC_REGS(regs)	((regs)->tf_r15 & R15_PC)
     56 #define PC_ADVANCE(regs) ((regs)->tf_r15 += BKPT_SIZE)
     57 #else
     58 #define	PC_REGS(regs)	((regs)->tf_pc)
     59 #define PC_ADVANCE(r)   ((r)->tf_r15 += BKPT_SIZE)
     60 #endif
     61 
     62 #define	BKPT_ADDR(addr)	(addr)			/* breakpoint address */
     63 #if defined(DDB)
     64 #define	BKPT_INST	(KERNEL_BREAKPOINT)	/* breakpoint instruction */
     65 #else
     66 /* breakpoint instruction if we use KGDB, this is used in db_set_temp_breakpoint() */
     67 #define BKPT_INST	(GDB5_BREAKPOINT)
     68 #endif
     69 #define	BKPT_SIZE	(INSN_SIZE)		/* size of breakpoint inst */
     70 #define	BKPT_SET(inst, addr)	(BKPT_INST)
     71 
     72 /*#define FIXUP_PC_AFTER_BREAK(regs)	((regs)->tf_pc -= BKPT_SIZE)*/
     73 
     74 #define	T_FAULT				(0)
     75 #define T_BREAKPOINT			(1)
     76 
     77 #define	IS_BREAKPOINT_TRAP(type, code)	((type) == T_BREAKPOINT)
     78 #define IS_WATCHPOINT_TRAP(type, code)	(0)
     79 
     80 #define	inst_trap_return(ins)	(0)
     81 /* ldmxx reg, {..., pc}
     82 					    01800000  stack mode
     83 					    000f0000  register
     84 					    0000ffff  register list */
     85 /* mov pc, reg
     86 					    0000000f  register */
     87 #define	inst_return(ins)	(((ins) & 0x0e108000) == 0x08108000 || \
     88 				 ((ins) & 0x0ff0fff0) == 0x01a0f000)
     89 /* bl ...
     90 					    00ffffff  offset>>2 */
     91 #define	inst_call(ins)		(((ins) & 0x0f000000) == 0x0b000000)
     92 /* b ...
     93 					    00ffffff  offset>>2 */
     94 /* ldr pc, [pc, reg, lsl #2]
     95 					    0000000f  register */
     96 #define	inst_branch(ins)	(((ins) & 0x0f000000) == 0x0a000000 || \
     97 				 ((ins) & 0x0fdffff0) == 0x079ff100 || \
     98 				 ((ins) & 0x0ff0f000) == 0x0590f000)
     99 #define inst_load(ins)		(0)
    100 #define inst_store(ins)		(0)
    101 #define inst_unconditional_flow_transfer(ins)	\
    102 	(__SHIFTOUT((ins), INSN_COND_MASK) == INSN_COND_AL \
    103 	 && (inst_branch(ins) || inst_call(ins) || inst_return(ins)))
    104 
    105 #define getreg_val			(0)
    106 #define next_instr_address(pc, bd)	((bd) ? (pc) : ((pc) + INSN_SIZE))
    107 
    108 #define DB_MACHINE_COMMANDS
    109 
    110 #define SOFTWARE_SSTEP
    111 
    112 u_int branch_taken(u_int insn, u_int pc, db_regs_t *db_regs);
    113 int kdb_trap(int, db_regs_t *);
    114 void db_machine_init(void);
    115 int db_validate_address(vm_offset_t addr);
    116 
    117 #define DB_ELF_SYMBOLS
    118 #define DB_ELFSIZE 32
    119 
    120 /*
    121  * kgdb
    122  */
    123 typedef register_t	kgdb_reg_t;
    124 #define KGDB_NUMREGS	(16 + 8*3 + 2)	/* r0..r15, f0..f7, fps, cpsr
    125 					 * fp-registers are 12 bytes wide */
    126 #define KGDB_REGNUM_R0		0
    127 #define KGDB_REGNUM_SPSR	16 + 8*3 + 1
    128 #define KGDB_BUFLEN		1024
    129 
    130 #endif	/* _ARM_DB_MACHDEP_H_ */
    131