1 /*- 2 * Copyright (c) 2014 Andrew Turner 3 * Copyright (c) 2014-2015 The FreeBSD Foundation 4 * All rights reserved. 5 * 6 * This software was developed by Semihalf under 7 * sponsorship from the FreeBSD Foundation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #ifndef _MACHINE_DB_MACHDEP_H_ 32 #define _MACHINE_DB_MACHDEP_H_ 33 34 #include <machine/frame.h> 35 #include <machine/trap.h> 36 37 #define T_BREAKPOINT (EXCP_BRK) 38 #define T_HW_BREAKPOINT (EXCP_BRKPT_EL1) 39 #define T_SINGLESTEP (EXCP_SOFTSTP_EL1) 40 #define T_WATCHPOINT (EXCP_WATCHPT_EL1) 41 42 #define HAS_HW_BREAKPOINT 43 #define NHBREAKPOINTS 16 44 45 typedef vm_offset_t db_addr_t; 46 typedef long db_expr_t; 47 48 #define PC_REGS() ((db_addr_t)kdb_thrctx->pcb_x[PCB_LR]) 49 50 #define BKPT_INST (0xd4200000) 51 #define BKPT_SIZE (4) 52 #define BKPT_SET(inst) (BKPT_INST) 53 54 #define BKPT_SKIP do { \ 55 kdb_frame->tf_elr += BKPT_SIZE; \ 56 kdb_thrctx->pcb_x[PCB_LR] += BKPT_SIZE; \ 57 } while (0) 58 59 #define db_clear_single_step kdb_cpu_clear_singlestep 60 #define db_set_single_step kdb_cpu_set_singlestep 61 62 #define IS_BREAKPOINT_TRAP(type, code) \ 63 (type == T_BREAKPOINT || type == T_HW_BREAKPOINT) 64 #define IS_SSTEP_TRAP(type, code) (type == T_SINGLESTEP) 65 #define IS_WATCHPOINT_TRAP(type, code) (type == T_WATCHPOINT) 66 67 #define inst_trap_return(ins) (0) 68 /* ret */ 69 #define inst_return(ins) (((ins) & 0xfffffc1fu) == 0xd65f0000) 70 #define inst_call(ins) (((ins) & 0xfc000000u) == 0x94000000u || /* BL */ \ 71 ((ins) & 0xfffffc1fu) == 0xd63f0000u) /* BLR */ 72 73 #define inst_load(ins) ({ \ 74 uint32_t tmp_instr = db_get_value(PC_REGS(), sizeof(uint32_t), FALSE); \ 75 is_load_instr(tmp_instr); \ 76 }) 77 78 #define inst_store(ins) ({ \ 79 uint32_t tmp_instr = db_get_value(PC_REGS(), sizeof(uint32_t), FALSE); \ 80 is_store_instr(tmp_instr); \ 81 }) 82 83 #define is_load_instr(ins) ((((ins) & 0x3b000000u) == 0x18000000u) || /* literal */ \ 84 (((ins) & 0x3f400000u) == 0x08400000u) || /* exclusive */ \ 85 (((ins) & 0x3bc00000u) == 0x28400000u) || /* no-allocate pair */ \ 86 ((((ins) & 0x3b200c00u) == 0x38000400u) && \ 87 (((ins) & 0x3be00c00u) != 0x38000400u) && \ 88 (((ins) & 0xffe00c00u) != 0x3c800400u)) || /* immediate post-indexed */ \ 89 ((((ins) & 0x3b200c00u) == 0x38000c00u) && \ 90 (((ins) & 0x3be00c00u) != 0x38000c00u) && \ 91 (((ins) & 0xffe00c00u) != 0x3c800c00u)) || /* immediate pre-indexed */ \ 92 ((((ins) & 0x3b200c00u) == 0x38200800u) && \ 93 (((ins) & 0x3be00c00u) != 0x38200800u) && \ 94 (((ins) & 0xffe00c00u) != 0x3ca00c80u)) || /* register offset */ \ 95 ((((ins) & 0x3b200c00u) == 0x38000800u) && \ 96 (((ins) & 0x3be00c00u) != 0x38000800u)) || /* unprivileged */ \ 97 ((((ins) & 0x3b200c00u) == 0x38000000u) && \ 98 (((ins) & 0x3be00c00u) != 0x38000000u) && \ 99 (((ins) & 0xffe00c00u) != 0x3c800000u)) || /* unscaled immediate */ \ 100 ((((ins) & 0x3b000000u) == 0x39000000u) && \ 101 (((ins) & 0x3bc00000u) != 0x39000000u) && \ 102 (((ins) & 0xffc00000u) != 0x3d800000u)) || /* unsigned immediate */ \ 103 (((ins) & 0x3bc00000u) == 0x28400000u) || /* pair (offset) */ \ 104 (((ins) & 0x3bc00000u) == 0x28c00000u) || /* pair (post-indexed) */ \ 105 (((ins) & 0x3bc00000u) == 0x29800000u)) /* pair (pre-indexed) */ 106 107 #define is_store_instr(ins) ((((ins) & 0x3f400000u) == 0x08000000u) || /* exclusive */ \ 108 (((ins) & 0x3bc00000u) == 0x28000000u) || /* no-allocate pair */ \ 109 ((((ins) & 0x3be00c00u) == 0x38000400u) || \ 110 (((ins) & 0xffe00c00u) == 0x3c800400u)) || /* immediate post-indexed */ \ 111 ((((ins) & 0x3be00c00u) == 0x38000c00u) || \ 112 (((ins) & 0xffe00c00u) == 0x3c800c00u)) || /* immediate pre-indexed */ \ 113 ((((ins) & 0x3be00c00u) == 0x38200800u) || \ 114 (((ins) & 0xffe00c00u) == 0x3ca00800u)) || /* register offset */ \ 115 (((ins) & 0x3be00c00u) == 0x38000800u) || /* unprivileged */ \ 116 ((((ins) & 0x3be00c00u) == 0x38000000u) || \ 117 (((ins) & 0xffe00c00u) == 0x3c800000u)) || /* unscaled immediate */ \ 118 ((((ins) & 0x3bc00000u) == 0x39000000u) || \ 119 (((ins) & 0xffc00000u) == 0x3d800000u)) || /* unsigned immediate */ \ 120 (((ins) & 0x3bc00000u) == 0x28000000u) || /* pair (offset) */ \ 121 (((ins) & 0x3bc00000u) == 0x28800000u) || /* pair (post-indexed) */ \ 122 (((ins) & 0x3bc00000u) == 0x29800000u)) /* pair (pre-indexed) */ 123 124 #define next_instr_address(pc, bd) ((bd) ? (pc) : ((pc) + 4)) 125 126 #define DB_ELFSIZE 64 127 128 #endif /* !_MACHINE_DB_MACHDEP_H_ */ 129