| 1 | /* GNU/Linux/m32r specific low level interface, for the remote server for GDB. |
| 2 | Copyright (C) 2005-2020 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 3 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include "server.h" |
| 20 | #include "linux-low.h" |
| 21 | |
| 22 | #ifdef HAVE_SYS_REG_H |
| 23 | #include <sys/reg.h> |
| 24 | #endif |
| 25 | |
| 26 | /* Defined in auto-generated file reg-m32r.c. */ |
| 27 | void init_registers_m32r (void); |
| 28 | extern const struct target_desc *tdesc_m32r; |
| 29 | |
| 30 | #define m32r_num_regs 25 |
| 31 | |
| 32 | static int m32r_regmap[] = { |
| 33 | #ifdef PT_R0 |
| 34 | PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5, PT_R6, PT_R7, |
| 35 | PT_R8, PT_R9, PT_R10, PT_R11, PT_R12, PT_FP, PT_LR, PT_SPU, |
| 36 | PT_PSW, PT_CBR, PT_SPI, PT_SPU, PT_BPC, PT_PC, PT_ACCL, PT_ACCH, PT_EVB |
| 37 | #else |
| 38 | 4 * 4, 4 * 5, 4 * 6, 4 * 7, 4 * 0, 4 * 1, 4 * 2, 4 * 8, |
| 39 | 4 * 9, 4 * 10, 4 * 11, 4 * 12, 4 * 13, 4 * 24, 4 * 25, 4 * 23, |
| 40 | 4 * 19, 4 * 31, 4 * 26, 4 * 23, 4 * 20, 4 * 30, 4 * 16, 4 * 15, 4 * 32 |
| 41 | #endif |
| 42 | }; |
| 43 | |
| 44 | static int |
| 45 | m32r_cannot_store_register (int regno) |
| 46 | { |
| 47 | return (regno >= m32r_num_regs); |
| 48 | } |
| 49 | |
| 50 | static int |
| 51 | m32r_cannot_fetch_register (int regno) |
| 52 | { |
| 53 | return (regno >= m32r_num_regs); |
| 54 | } |
| 55 | |
| 56 | static const unsigned short m32r_breakpoint = 0x10f1; |
| 57 | #define m32r_breakpoint_len 2 |
| 58 | |
| 59 | /* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */ |
| 60 | |
| 61 | static const gdb_byte * |
| 62 | m32r_sw_breakpoint_from_kind (int kind, int *size) |
| 63 | { |
| 64 | *size = m32r_breakpoint_len; |
| 65 | return (const gdb_byte *) &m32r_breakpoint; |
| 66 | } |
| 67 | |
| 68 | static int |
| 69 | m32r_breakpoint_at (CORE_ADDR where) |
| 70 | { |
| 71 | unsigned short insn; |
| 72 | |
| 73 | the_target->pt->read_memory (where, (unsigned char *) &insn, |
| 74 | m32r_breakpoint_len); |
| 75 | if (insn == m32r_breakpoint) |
| 76 | return 1; |
| 77 | |
| 78 | /* If necessary, recognize more trap instructions here. GDB only uses the |
| 79 | one. */ |
| 80 | return 0; |
| 81 | } |
| 82 | |
| 83 | static void |
| 84 | m32r_arch_setup (void) |
| 85 | { |
| 86 | current_process ()->tdesc = tdesc_m32r; |
| 87 | } |
| 88 | |
| 89 | /* Support for hardware single step. */ |
| 90 | |
| 91 | static int |
| 92 | m32r_supports_hardware_single_step (void) |
| 93 | { |
| 94 | return 1; |
| 95 | } |
| 96 | |
| 97 | static struct usrregs_info m32r_usrregs_info = |
| 98 | { |
| 99 | m32r_num_regs, |
| 100 | m32r_regmap, |
| 101 | }; |
| 102 | |
| 103 | static struct regs_info regs_info = |
| 104 | { |
| 105 | NULL, /* regset_bitmap */ |
| 106 | &m32r_usrregs_info, |
| 107 | }; |
| 108 | |
| 109 | static const struct regs_info * |
| 110 | m32r_regs_info (void) |
| 111 | { |
| 112 | return ®s_info; |
| 113 | } |
| 114 | |
| 115 | struct linux_target_ops the_low_target = { |
| 116 | m32r_arch_setup, |
| 117 | m32r_regs_info, |
| 118 | m32r_cannot_fetch_register, |
| 119 | m32r_cannot_store_register, |
| 120 | NULL, /* fetch_register */ |
| 121 | linux_get_pc_32bit, |
| 122 | linux_set_pc_32bit, |
| 123 | NULL, /* breakpoint_from_pc */ |
| 124 | m32r_sw_breakpoint_from_kind, |
| 125 | NULL, |
| 126 | 0, |
| 127 | m32r_breakpoint_at, |
| 128 | NULL, /* supports_z_point_type */ |
| 129 | NULL, /* insert_point */ |
| 130 | NULL, /* remove_point */ |
| 131 | NULL, /* stopped_by_watchpoint */ |
| 132 | NULL, /* stopped_data_address */ |
| 133 | NULL, /* collect_ptrace_register */ |
| 134 | NULL, /* supply_ptrace_register */ |
| 135 | NULL, /* siginfo_fixup */ |
| 136 | NULL, /* new_process */ |
| 137 | NULL, /* delete_process */ |
| 138 | NULL, /* new_thread */ |
| 139 | NULL, /* delete_thread */ |
| 140 | NULL, /* new_fork */ |
| 141 | NULL, /* prepare_to_resume */ |
| 142 | NULL, /* process_qsupported */ |
| 143 | NULL, /* supports_tracepoints */ |
| 144 | NULL, /* get_thread_area */ |
| 145 | NULL, /* install_fast_tracepoint_jump_pad */ |
| 146 | NULL, /* emit_ops */ |
| 147 | NULL, /* get_min_fast_tracepoint_insn_len */ |
| 148 | NULL, /* supports_range_stepping */ |
| 149 | NULL, /* breakpoint_kind_from_current_state */ |
| 150 | m32r_supports_hardware_single_step, |
| 151 | }; |
| 152 | |
| 153 | void |
| 154 | initialize_low_arch (void) |
| 155 | { |
| 156 | init_registers_m32r (); |
| 157 | } |