sys/arch/arm/include/db_machdep.h

   1 /*      $NetBSD: db_machdep.h,v 1.18 2012/02/16 02:26:35 christos 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@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         ((((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_ */