The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/arm/include/db_machdep.h

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    1 /*-
    2  * Mach Operating System
    3  * Copyright (c) 1991,1990 Carnegie Mellon University
    4  * All Rights Reserved.
    5  *
    6  * Permission to use, copy, modify and distribute this software and its
    7  * documentation is hereby granted, provided that both the copyright
    8  * notice and this permission notice appear in all copies of the
    9  * software, derivative works or modified versions, and any portions
   10  * thereof, and that both notices appear in supporting documentation.
   11  *
   12  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
   13  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
   14  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   15  *
   16  * Carnegie Mellon requests users of this software to return to
   17  *
   18  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   19  *  School of Computer Science
   20  *  Carnegie Mellon University
   21  *  Pittsburgh PA 15213-3890
   22  *
   23  * any improvements or extensions that they make and grant Carnegie Mellon
   24  * the rights to redistribute these changes.
   25  *
   26  *      from: FreeBSD: src/sys/i386/include/db_machdep.h,v 1.16 1999/10/04
   27  * $FreeBSD: releng/11.0/sys/arm/include/db_machdep.h 300694 2016-05-25 19:44:26Z ian $
   28  */
   29 
   30 #ifndef _MACHINE_DB_MACHDEP_H_
   31 #define _MACHINE_DB_MACHDEP_H_
   32 
   33 #include <machine/frame.h>
   34 #include <machine/trap.h>
   35 #include <machine/armreg.h>
   36 
   37 #define T_BREAKPOINT    (1)
   38 #define T_WATCHPOINT    (2)
   39 typedef vm_offset_t     db_addr_t;
   40 typedef int             db_expr_t;
   41 
   42 #define PC_REGS()       ((db_addr_t)kdb_thrctx->pcb_regs.sf_pc)
   43 
   44 #define BKPT_INST       (KERNEL_BREAKPOINT)
   45 #define BKPT_SIZE       (INSN_SIZE)
   46 #define BKPT_SET(inst)  (BKPT_INST)
   47 
   48 #define BKPT_SKIP do {                                                  \
   49         kdb_frame->tf_pc += BKPT_SIZE; \
   50 } while (0)
   51 
   52 #if __ARM_ARCH >= 6
   53 #define db_clear_single_step    kdb_cpu_clear_singlestep
   54 #define db_set_single_step      kdb_cpu_set_singlestep
   55 #define db_pc_is_singlestep     kdb_cpu_pc_is_singlestep
   56 #else
   57 #define SOFTWARE_SSTEP  1
   58 #endif
   59 
   60 #define IS_BREAKPOINT_TRAP(type, code)  (type == T_BREAKPOINT)
   61 #define IS_WATCHPOINT_TRAP(type, code)  (type == T_WATCHPOINT)
   62 
   63 #define inst_trap_return(ins)   (0)
   64 /* ldmxx reg, {..., pc}
   65                                             01800000  stack mode
   66                                             000f0000  register
   67                                             0000ffff  register list */
   68 /* mov pc, reg
   69                                             0000000f  register */
   70 #define inst_return(ins)        (((ins) & 0x0e108000) == 0x08108000 || \
   71                                  ((ins) & 0x0ff0fff0) == 0x01a0f000 ||  \
   72                                  ((ins) & 0x0ffffff0) == 0x012fff10) /* bx */
   73 /* bl ...
   74                                             00ffffff  offset>>2 */
   75 #define inst_call(ins)          (((ins) & 0x0f000000) == 0x0b000000)
   76 /* b ...
   77                                             00ffffff  offset>>2 */
   78 /* ldr pc, [pc, reg, lsl #2]
   79                                             0000000f  register */
   80 
   81 #define inst_branch(ins)        (((ins) & 0x0f000000) == 0x0a000000 || \
   82                                  ((ins) & 0x0fdffff0) == 0x079ff100 || \
   83                                  ((ins) & 0x0cd0f000) == 0x0490f000 || \
   84                                  ((ins) & 0x0ffffff0) == 0x012fff30 || /* blx */ \
   85                                  ((ins) & 0x0de0f000) == 0x0080f000)
   86 
   87 #define inst_load(ins)          (0)
   88 #define inst_store(ins)         (0)
   89 
   90 #define next_instr_address(pc, bd)      ((bd) ? (pc) : ((pc) + INSN_SIZE))
   91 
   92 #define DB_SMALL_VALUE_MAX      (0x7fffffff)
   93 #define DB_SMALL_VALUE_MIN      (-0x40001)
   94 
   95 #define DB_ELFSIZE              32
   96 
   97 int db_validate_address(vm_offset_t);
   98 
   99 u_int branch_taken (u_int insn, db_addr_t pc);
  100 
  101 #ifdef __ARMEB__
  102 #define BYTE_MSF        (1)
  103 #endif
  104 #endif /* !_MACHINE_DB_MACHDEP_H_ */

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