| 1 | /* Low level interface to ns532 running mach 3.0. |
| 2 | Copyright (C) 1992 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 2 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, write to the Free Software |
| 18 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 19 | Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | #include "defs.h" |
| 22 | #include "inferior.h" |
| 23 | |
| 24 | #include <stdio.h> |
| 25 | |
| 26 | #include <mach.h> |
| 27 | #include <mach/message.h> |
| 28 | #include <mach/exception.h> |
| 29 | #include <mach_error.h> |
| 30 | |
| 31 | #define private static |
| 32 | \f |
| 33 | |
| 34 | /* Find offsets to thread states at compile time. |
| 35 | * If your compiler does not grok this, calculate offsets |
| 36 | * offsets yourself and use them (or get a compatible compiler :-) |
| 37 | */ |
| 38 | |
| 39 | #define REG_N_OFFSET(reg) (int)(&((struct ns532_combined_state *)0)->ts.reg) |
| 40 | #define REG_F_OFFSET(reg) (int)(&((struct ns532_combined_state *)0)->fs.reg) |
| 41 | |
| 42 | /* at reg_offset[i] is the offset to the ns532_combined_state |
| 43 | * location where the gdb registers[i] is stored. |
| 44 | */ |
| 45 | |
| 46 | static int reg_offset[] = |
| 47 | { |
| 48 | REG_N_OFFSET (r0), REG_N_OFFSET (r1), REG_N_OFFSET (r2), REG_N_OFFSET (r3), |
| 49 | REG_N_OFFSET (r4), REG_N_OFFSET (r5), REG_N_OFFSET (r6), REG_N_OFFSET (r7), |
| 50 | REG_F_OFFSET (l0a), REG_F_OFFSET (l0b), REG_F_OFFSET (l2a), REG_F_OFFSET (l2b), |
| 51 | REG_F_OFFSET (l4a), REG_F_OFFSET (l4b), REG_F_OFFSET (l6a), REG_F_OFFSET (l6b), |
| 52 | REG_N_OFFSET (sp), REG_N_OFFSET (fp), REG_N_OFFSET (pc), REG_N_OFFSET (psr), |
| 53 | REG_F_OFFSET (fsr), |
| 54 | REG_F_OFFSET (l0a), REG_F_OFFSET (l1a), REG_F_OFFSET (l2a), REG_F_OFFSET (l3a), |
| 55 | REG_F_OFFSET (l4a), REG_F_OFFSET (l5a), REG_F_OFFSET (l6a), REG_F_OFFSET (l7a), |
| 56 | }; |
| 57 | |
| 58 | #define REG_ADDRESS(state,regnum) ((char *)(state)+reg_offset[regnum]) |
| 59 | |
| 60 | /* Fetch COUNT contiguous registers from thread STATE starting from REGNUM |
| 61 | * Caller knows that the regs handled in one transaction are of same size. |
| 62 | */ |
| 63 | #define FETCH_REGS(state, regnum, count) \ |
| 64 | memcpy (®isters[REGISTER_BYTE (regnum)], \ |
| 65 | (char *)state+reg_offset[ regnum ], \ |
| 66 | count*REGISTER_SIZE) |
| 67 | |
| 68 | /* Store COUNT contiguous registers to thread STATE starting from REGNUM */ |
| 69 | #define STORE_REGS(state, regnum, count) \ |
| 70 | memcpy ((char *)state+reg_offset[ regnum ], \ |
| 71 | ®isters[REGISTER_BYTE (regnum)], \ |
| 72 | count*REGISTER_SIZE) |
| 73 | \f |
| 74 | /* |
| 75 | * Fetch inferiors registers for gdb. |
| 76 | * REGNO specifies which (as gdb views it) register, -1 for all. |
| 77 | */ |
| 78 | |
| 79 | void |
| 80 | fetch_inferior_registers (int regno) |
| 81 | { |
| 82 | kern_return_t ret; |
| 83 | thread_state_data_t state; |
| 84 | unsigned int stateCnt = NS532_COMBINED_STATE_COUNT; |
| 85 | int index; |
| 86 | |
| 87 | if (!MACH_PORT_VALID (current_thread)) |
| 88 | error ("fetch inferior registers: Invalid thread"); |
| 89 | |
| 90 | if (must_suspend_thread) |
| 91 | setup_thread (current_thread, 1); |
| 92 | |
| 93 | ret = thread_get_state (current_thread, |
| 94 | NS532_COMBINED_STATE, |
| 95 | state, |
| 96 | &stateCnt); |
| 97 | |
| 98 | if (ret != KERN_SUCCESS) |
| 99 | warning ("fetch_inferior_registers: %s ", |
| 100 | mach_error_string (ret)); |
| 101 | #if 0 |
| 102 | /* It may be more effective to store validate all of them, |
| 103 | * since we fetched them all anyway |
| 104 | */ |
| 105 | else if (regno != -1) |
| 106 | supply_register (regno, (char *) state + reg_offset[regno]); |
| 107 | #endif |
| 108 | else |
| 109 | { |
| 110 | for (index = 0; index < NUM_REGS; index++) |
| 111 | supply_register (index, (char *) state + reg_offset[index]); |
| 112 | } |
| 113 | |
| 114 | if (must_suspend_thread) |
| 115 | setup_thread (current_thread, 0); |
| 116 | } |
| 117 | \f |
| 118 | /* Store our register values back into the inferior. |
| 119 | * If REGNO is -1, do this for all registers. |
| 120 | * Otherwise, REGNO specifies which register |
| 121 | * |
| 122 | * On mach3 all registers are always saved in one call. |
| 123 | */ |
| 124 | void |
| 125 | store_inferior_registers (int regno) |
| 126 | { |
| 127 | kern_return_t ret; |
| 128 | thread_state_data_t state; |
| 129 | unsigned int stateCnt = NS532_COMBINED_STATE_COUNT; |
| 130 | register int index; |
| 131 | |
| 132 | if (!MACH_PORT_VALID (current_thread)) |
| 133 | error ("store inferior registers: Invalid thread"); |
| 134 | |
| 135 | if (must_suspend_thread) |
| 136 | setup_thread (current_thread, 1); |
| 137 | |
| 138 | /* Fetch the state of the current thread */ |
| 139 | ret = thread_get_state (current_thread, |
| 140 | NS532_COMBINED_STATE, |
| 141 | state, |
| 142 | &stateCnt); |
| 143 | |
| 144 | if (ret != KERN_SUCCESS) |
| 145 | { |
| 146 | warning ("store_inferior_registers (get): %s", |
| 147 | mach_error_string (ret)); |
| 148 | if (must_suspend_thread) |
| 149 | setup_thread (current_thread, 0); |
| 150 | return; |
| 151 | } |
| 152 | |
| 153 | /* move gdb's registers to thread's state |
| 154 | |
| 155 | * Since we save all registers anyway, save the ones |
| 156 | * that gdb thinks are valid (e.g. ignore the regno |
| 157 | * parameter) |
| 158 | */ |
| 159 | #if 0 |
| 160 | if (regno != -1) |
| 161 | STORE_REGS (state, regno, 1); |
| 162 | else |
| 163 | #endif |
| 164 | { |
| 165 | for (index = 0; index < NUM_REGS; index++) |
| 166 | STORE_REGS (state, index, 1); |
| 167 | } |
| 168 | |
| 169 | /* Write gdb's current view of register to the thread |
| 170 | */ |
| 171 | ret = thread_set_state (current_thread, |
| 172 | NS532_COMBINED_STATE, |
| 173 | state, |
| 174 | NS532_COMBINED_STATE_COUNT); |
| 175 | |
| 176 | if (ret != KERN_SUCCESS) |
| 177 | warning ("store_inferior_registers (set): %s", |
| 178 | mach_error_string (ret)); |
| 179 | |
| 180 | if (must_suspend_thread) |
| 181 | setup_thread (current_thread, 0); |
| 182 | } |