| 1 | /* Copyright (C) 2007-2020 Free Software Foundation, Inc. |
| 2 | |
| 3 | This file is part of GDB. |
| 4 | |
| 5 | This program is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation; either version 3 of the License, or |
| 8 | (at your option) any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #include "server.h" |
| 19 | #include "win32-low.h" |
| 20 | |
| 21 | using namespace windows_nat; |
| 22 | |
| 23 | #ifndef CONTEXT_FLOATING_POINT |
| 24 | #define CONTEXT_FLOATING_POINT 0 |
| 25 | #endif |
| 26 | |
| 27 | /* Defined in auto-generated file reg-arm.c. */ |
| 28 | void init_registers_arm (void); |
| 29 | extern const struct target_desc *tdesc_arm; |
| 30 | |
| 31 | static void |
| 32 | arm_get_thread_context (windows_thread_info *th) |
| 33 | { |
| 34 | th->context.ContextFlags = \ |
| 35 | CONTEXT_FULL | \ |
| 36 | CONTEXT_FLOATING_POINT; |
| 37 | |
| 38 | GetThreadContext (th->h, &th->context); |
| 39 | } |
| 40 | |
| 41 | #define context_offset(x) ((int)&(((CONTEXT *)NULL)->x)) |
| 42 | static const int mappings[] = { |
| 43 | context_offset (R0), |
| 44 | context_offset (R1), |
| 45 | context_offset (R2), |
| 46 | context_offset (R3), |
| 47 | context_offset (R4), |
| 48 | context_offset (R5), |
| 49 | context_offset (R6), |
| 50 | context_offset (R7), |
| 51 | context_offset (R8), |
| 52 | context_offset (R9), |
| 53 | context_offset (R10), |
| 54 | context_offset (R11), |
| 55 | context_offset (R12), |
| 56 | context_offset (Sp), |
| 57 | context_offset (Lr), |
| 58 | context_offset (Pc), |
| 59 | -1, /* f0 */ |
| 60 | -1, /* f1 */ |
| 61 | -1, /* f2 */ |
| 62 | -1, /* f3 */ |
| 63 | -1, /* f4 */ |
| 64 | -1, /* f5 */ |
| 65 | -1, /* f6 */ |
| 66 | -1, /* f7 */ |
| 67 | -1, /* fps */ |
| 68 | context_offset (Psr), |
| 69 | }; |
| 70 | #undef context_offset |
| 71 | |
| 72 | /* Return a pointer into a CONTEXT field indexed by gdb register number. |
| 73 | Return a pointer to an dummy register holding zero if there is no |
| 74 | corresponding CONTEXT field for the given register number. */ |
| 75 | static char * |
| 76 | regptr (CONTEXT* c, int r) |
| 77 | { |
| 78 | if (mappings[r] < 0) |
| 79 | { |
| 80 | static ULONG zero; |
| 81 | /* Always force value to zero, in case the user tried to write |
| 82 | to this register before. */ |
| 83 | zero = 0; |
| 84 | return (char *) &zero; |
| 85 | } |
| 86 | else |
| 87 | return (char *) c + mappings[r]; |
| 88 | } |
| 89 | |
| 90 | /* Fetch register from gdbserver regcache data. */ |
| 91 | static void |
| 92 | arm_fetch_inferior_register (struct regcache *regcache, |
| 93 | windows_thread_info *th, int r) |
| 94 | { |
| 95 | char *context_offset = regptr (&th->context, r); |
| 96 | supply_register (regcache, r, context_offset); |
| 97 | } |
| 98 | |
| 99 | /* Store a new register value into the thread context of TH. */ |
| 100 | static void |
| 101 | arm_store_inferior_register (struct regcache *regcache, |
| 102 | windows_thread_info *th, int r) |
| 103 | { |
| 104 | collect_register (regcache, r, regptr (&th->context, r)); |
| 105 | } |
| 106 | |
| 107 | static void |
| 108 | arm_arch_setup (void) |
| 109 | { |
| 110 | init_registers_arm (); |
| 111 | win32_tdesc = tdesc_arm; |
| 112 | } |
| 113 | |
| 114 | /* Correct in either endianness. We do not support Thumb yet. */ |
| 115 | static const unsigned long arm_wince_breakpoint = 0xe6000010; |
| 116 | #define arm_wince_breakpoint_len 4 |
| 117 | |
| 118 | /* Implement win32_target_ops "get_pc" method. */ |
| 119 | |
| 120 | static CORE_ADDR |
| 121 | arm_win32_get_pc (struct regcache *regcache) |
| 122 | { |
| 123 | uint32_t pc; |
| 124 | |
| 125 | collect_register_by_name (regcache, "pc", &pc); |
| 126 | return (CORE_ADDR) pc; |
| 127 | } |
| 128 | |
| 129 | /* Implement win32_target_ops "set_pc" method. */ |
| 130 | |
| 131 | static void |
| 132 | arm_win32_set_pc (struct regcache *regcache, CORE_ADDR pc) |
| 133 | { |
| 134 | uint32_t newpc = pc; |
| 135 | |
| 136 | supply_register_by_name (regcache, "pc", &newpc); |
| 137 | } |
| 138 | |
| 139 | struct win32_target_ops the_low_target = { |
| 140 | arm_arch_setup, |
| 141 | sizeof (mappings) / sizeof (mappings[0]), |
| 142 | NULL, /* initial_stuff */ |
| 143 | arm_get_thread_context, |
| 144 | NULL, /* prepare_to_resume */ |
| 145 | NULL, /* thread_added */ |
| 146 | arm_fetch_inferior_register, |
| 147 | arm_store_inferior_register, |
| 148 | NULL, /* single_step */ |
| 149 | (const unsigned char *) &arm_wince_breakpoint, |
| 150 | arm_wince_breakpoint_len, |
| 151 | arm_win32_get_pc, |
| 152 | arm_win32_set_pc, |
| 153 | /* Watchpoint related functions. See target.h for comments. */ |
| 154 | NULL, /* supports_z_point_type */ |
| 155 | NULL, /* insert_point */ |
| 156 | NULL, /* remove_point */ |
| 157 | NULL, /* stopped_by_watchpoint */ |
| 158 | NULL /* stopped_data_address */ |
| 159 | }; |