sys/arch/arm/include/db_machdep.h

   1 /*      $NetBSD: db_machdep.h,v 1.22 2014/09/13 18:08:38 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@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 #ifndef MULTIPROCESSOR
  52 extern db_regs_t ddb_regs;      /* register state */
  53 #define DDB_REGS        (&ddb_regs)
  54 #else
  55 extern db_regs_t *ddb_regp;
  56 #define DDB_REGS        (ddb_regp)
  57 #define ddb_regs        (*ddb_regp)
  58 #endif
  59
  60 #ifdef __PROG26
  61 #define PC_REGS(regs)   ((regs)->tf_r15 & R15_PC)
  62 #define PC_ADVANCE(regs) ((regs)->tf_r15 += BKPT_SIZE)
  63 #else
  64 #define PC_REGS(regs)   ((regs)->tf_pc)
  65 #define PC_ADVANCE(r)   ((r)->tf_r15 += BKPT_SIZE)
  66 #endif
  67
  68 #define BKPT_ADDR(addr) (addr)                  /* breakpoint address */
  69 #if defined(DDB)
  70 #define BKPT_INST       (KERNEL_BREAKPOINT)     /* breakpoint instruction */
  71 #else
  72 /* breakpoint instruction if we use KGDB, this is used in db_set_temp_breakpoint() */
  73 #define BKPT_INST       (GDB5_BREAKPOINT)
  74 #endif
  75 #define BKPT_SIZE       (INSN_SIZE)             /* size of breakpoint inst */
  76 #define BKPT_SET(inst, addr)    (BKPT_INST)
  77
  78 /*#define FIXUP_PC_AFTER_BREAK(regs)    ((regs)->tf_pc -= BKPT_SIZE)*/
  79
  80 #define T_FAULT                         (0)
  81 #define T_BREAKPOINT                    (1)
  82
  83 #define IS_BREAKPOINT_TRAP(type, code)  ((type) == T_BREAKPOINT)
  84 #define IS_WATCHPOINT_TRAP(type, code)  (0)
  85
  86 #define inst_trap_return(ins)   (0)
  87 /* ldmxx reg, {..., pc}
  88                                             01800000  stack mode
  89                                             000f0000  register
  90                                             0000ffff  register list */
  91 /* mov pc, reg
  92                                             0000000f  register */
  93 #define inst_return(ins)        (((ins) & 0x0e108000) == 0x08108000 || \
  94                                  ((ins) & 0x0ff0fff0) == 0x01a0f000)
  95 /* bl ...
  96                                             00ffffff  offset>>2 */
  97 #define inst_call(ins)          (((ins) & 0x0f000000) == 0x0b000000)
  98 /* b ...
  99                                             00ffffff  offset>>2 */
 100 /* ldr pc, [pc, reg, lsl #2]
 101                                             0000000f  register */
 102 #define inst_branch(ins)        (((ins) & 0x0f000000) == 0x0a000000 || \
 103                                  ((ins) & 0x0fdffff0) == 0x079ff100 || \
 104                                  ((ins) & 0x0ff0f000) == 0x0590f000)
 105 #define inst_load(ins)          (0)
 106 #define inst_store(ins)         (0)
 107 #define inst_unconditional_flow_transfer(ins)   \
 108         (__SHIFTOUT((ins), INSN_COND_MASK) == INSN_COND_AL \
 109          && (inst_branch(ins) || inst_call(ins) || inst_return(ins)))
 110
 111 #define getreg_val                      (0)
 112 #define next_instr_address(pc, bd)      ((bd) ? (pc) : ((pc) + INSN_SIZE))
 113
 114 #define DB_MACHINE_COMMANDS
 115
 116 #define SOFTWARE_SSTEP
 117
 118 u_int branch_taken(u_int insn, u_int pc, db_regs_t *db_regs);
 119 int kdb_trap(int, db_regs_t *);
 120 void db_machine_init(void);
 121 int db_validate_address(vaddr_t addr);
 122
 123 #define DB_ELF_SYMBOLS
 124 #define DB_ELFSIZE 32
 125
 126 /*
 127  * kgdb
 128  */
 129 typedef register_t      kgdb_reg_t;
 130 #define KGDB_NUMREGS    (16 + 8*3 + 2)  /* r0..r15, f0..f7, fps, cpsr
 131                                          * fp-registers are 12 bytes wide */
 132 #define KGDB_REGNUM_R0          0
 133 #define KGDB_REGNUM_SPSR        16 + 8*3 + 1
 134 #define KGDB_BUFLEN             1024
 135
 136 /*
 137  * MP stuff
 138  */
 139 extern volatile struct cpu_info *db_onproc;
 140 extern volatile struct cpu_info *db_newcpu;
 141 #endif  /* _ARM_DB_MACHDEP_H_ */