[4721cf1] | 1 | /* |
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| 2 | ************************************************************************** |
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| 3 | * |
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| 4 | * Component = |
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| 5 | * |
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| 6 | * Synopsis = rkdb/rkdb.c |
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| 7 | * |
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[981b99f] | 8 | * $Id$ |
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| 9 | * |
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[4721cf1] | 10 | ************************************************************************** |
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| 11 | */ |
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| 12 | |
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| 13 | #include <assert.h> |
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| 14 | #include <errno.h> |
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| 15 | #include <rdbg/rdbg.h> |
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| 16 | #include <rdbg/rdbg_f.h> |
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| 17 | #include <rdbg/servrpc.h> |
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| 18 | |
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| 19 | extern rtems_id serializeSemId; |
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| 20 | extern rtems_id wakeupEventSemId; |
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| 21 | extern rtems_id eventTaskId; |
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[40cf43ea] | 22 | extern rtems_id debugId; |
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[4721cf1] | 23 | extern Exception_context *FirstCtx; |
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| 24 | extern Exception_context *LastCtx; |
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| 25 | extern CPU_Exception_frame SavedContext; |
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| 26 | extern unsigned int NbExceptCtx; |
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| 27 | |
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[40cf43ea] | 28 | /* |
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| 29 | * return a pointer to the Thread Control structure of the specified |
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| 30 | * Id |
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| 31 | */ |
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[4721cf1] | 32 | |
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[40cf43ea] | 33 | Thread_Control * |
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| 34 | Thread_Get_RDBG (Objects_Id Id) |
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[4721cf1] | 35 | { |
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| 36 | unsigned index; |
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| 37 | |
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[ce8e6a8] | 38 | if (Id < _Objects_Information_table[OBJECTS_CLASSIC_API][1]->maximum_id && |
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| 39 | Id > _Objects_Information_table[OBJECTS_CLASSIC_API][1]->minimum_id) { |
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[4721cf1] | 40 | |
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[ce8e6a8] | 41 | index = Id - _Objects_Information_table[OBJECTS_CLASSIC_API][1]->minimum_id; |
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| 42 | if (_Objects_Information_table[OBJECTS_CLASSIC_API][1]->local_table[1 + index] != NULL) { |
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| 43 | return (Thread_Control*) (_Objects_Information_table[OBJECTS_CLASSIC_API][1]->local_table[1 + index]); |
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[4721cf1] | 44 | } |
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| 45 | } |
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[40cf43ea] | 46 | |
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[ce8e6a8] | 47 | if (Id < _Objects_Information_table[OBJECTS_POSIX_API][1]->maximum_id && |
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| 48 | Id > _Objects_Information_table[OBJECTS_POSIX_API][1]->minimum_id) { |
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[4721cf1] | 49 | |
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[ce8e6a8] | 50 | index = Id - _Objects_Information_table[OBJECTS_POSIX_API][1]->minimum_id; |
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| 51 | if (_Objects_Information_table[OBJECTS_POSIX_API][1]-> |
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[40cf43ea] | 52 | local_table[1 + index] != NULL) |
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[ce8e6a8] | 53 | return (Thread_Control*) (_Objects_Information_table[OBJECTS_POSIX_API][1]->local_table[1 + index]); |
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[4721cf1] | 54 | } |
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| 55 | |
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| 56 | return 0; |
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| 57 | |
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| 58 | } |
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| 59 | |
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[40cf43ea] | 60 | int |
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| 61 | safeMemRead (void *src, void *dest, int nbBytes) |
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| 62 | { |
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[4721cf1] | 63 | |
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| 64 | /* |
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| 65 | * safe because if it generates an exception, |
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| 66 | * it must return normally |
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| 67 | * TBD |
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| 68 | */ |
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| 69 | |
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[40cf43ea] | 70 | memcpy (dest, src, nbBytes); |
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[4721cf1] | 71 | return 0; |
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| 72 | } |
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| 73 | |
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[40cf43ea] | 74 | int |
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| 75 | safeMemWrite (void *src, void *dest, int nbBytes) |
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| 76 | { |
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[4721cf1] | 77 | |
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| 78 | /* |
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| 79 | * safe because if it generates an exception, |
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| 80 | * it must return normally |
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| 81 | * TBD |
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| 82 | */ |
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[40cf43ea] | 83 | |
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| 84 | memcpy (dest, src, nbBytes); |
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| 85 | return 0; |
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[4721cf1] | 86 | } |
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| 87 | |
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[40cf43ea] | 88 | int |
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| 89 | ptrace (int request, int pid, char *addr, int data, char *addr2) |
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| 90 | { |
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| 91 | int diag; |
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| 92 | errno = 0; |
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| 93 | if (pid != 1) { |
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| 94 | errno = ESRCH; |
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| 95 | return -1; |
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| 96 | } |
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| 97 | switch (request) { |
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| 98 | |
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| 99 | case RPT_SINGLESTEP:{ |
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| 100 | Exception_context *ctx; |
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| 101 | |
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| 102 | if (CannotRestart == 1) { |
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| 103 | setErrno (EIO); |
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| 104 | return -1; |
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| 105 | } |
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| 106 | |
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| 107 | if ((ctx = GetExceptCtx (currentTargetThread)) != NULL) { |
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| 108 | Single_Step (ctx->ctx); |
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| 109 | rtems_semaphore_release (ctx->semaphoreId); |
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| 110 | return 0; |
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| 111 | } |
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| 112 | break; |
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| 113 | } |
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| 114 | |
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| 115 | case RPT_PEEKTEXT: |
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| 116 | case RPT_PEEKDATA:{ |
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| 117 | diag = safeMemRead (addr, &data, sizeof data); |
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| 118 | if (diag == 0) |
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| 119 | return data; |
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| 120 | mem_error: |
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| 121 | return -1; |
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| 122 | } |
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| 123 | |
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| 124 | case RPT_POKETEXT:{ |
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| 125 | diag = safeMemWrite (&data, addr, sizeof data); |
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| 126 | |
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| 127 | /* |
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| 128 | * We must flush the INSTR and DATA cache to be sure the |
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| 129 | * opcode modification is taken into account, because |
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| 130 | * the breakpoint opcode is written via the data cache |
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| 131 | * while execution code is fetched via the instruction |
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| 132 | * cache |
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| 133 | */ |
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| 134 | |
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| 135 | if (diag == 0) { |
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| 136 | copyback_data_cache_and_invalidate_instr_cache (addr, sizeof data); |
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| 137 | return 0; |
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| 138 | } |
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| 139 | goto mem_error; |
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| 140 | } |
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| 141 | case RPT_POKEDATA:{ |
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| 142 | diag = safeMemWrite (&data, addr, sizeof data); |
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| 143 | if (diag == 0) |
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| 144 | return 0; |
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| 145 | goto mem_error; |
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| 146 | } |
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| 147 | case RPT_CONT:{ |
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| 148 | Exception_context *ctx; |
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| 149 | |
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| 150 | if (CannotRestart == 1) { |
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| 151 | setErrno (EIO); |
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| 152 | return -1; |
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| 153 | } |
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| 154 | |
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| 155 | ctx = GetExceptCtx (currentTargetThread); |
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| 156 | if (ctx == NULL) |
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| 157 | ctx = GetExceptCtx (debugId); |
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| 158 | |
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| 159 | if (ctx != NULL) { |
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| 160 | |
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| 161 | if (!isRdbgException (ctx)) { |
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| 162 | CannotRestart = 1; |
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| 163 | setErrno (EIO); |
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| 164 | return -1; |
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| 165 | } |
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| 166 | |
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| 167 | assert (data == 0); |
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| 168 | assert (ExitForSingleStep == 0); |
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| 169 | |
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| 170 | rtems_semaphore_release (ctx->semaphoreId); |
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| 171 | } |
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| 172 | rtems_semaphore_release (serializeSemId); |
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| 173 | return 0; |
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| 174 | } |
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| 175 | |
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| 176 | case RPT_ATTACH: |
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| 177 | return 0; |
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| 178 | |
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| 179 | case RPT_DETACH:{ |
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| 180 | Exception_context *ctx; |
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| 181 | |
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| 182 | if (NbExceptCtx || NbSerializedCtx) { |
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| 183 | ctx = FirstCtx; |
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| 184 | rtems_task_delete (eventTaskId); |
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| 185 | rtems_semaphore_delete (serializeSemId); |
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| 186 | rtems_semaphore_delete (wakeupEventSemId); |
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| 187 | } |
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| 188 | return 0; |
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| 189 | } |
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| 190 | |
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| 191 | case RPT_GETREGS:{ |
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| 192 | Exception_context *ctx; |
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| 193 | |
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| 194 | if ((ctx = GetExceptCtx (currentTargetThread)) != NULL) { |
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| 195 | CtxToRegs (ctx->ctx, (xdr_regs *) addr); |
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| 196 | return 0; |
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| 197 | } |
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| 198 | break; |
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| 199 | } |
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| 200 | |
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| 201 | case RPT_SETREGS:{ |
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| 202 | Exception_context *ctx; |
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| 203 | |
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| 204 | if ((ctx = GetExceptCtx (currentTargetThread)) != NULL) { |
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| 205 | RegsToCtx ((xdr_regs *) addr, ctx->ctx); |
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| 206 | return 0; |
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| 207 | } |
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| 208 | break; |
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| 209 | } |
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| 210 | |
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| 211 | case RPT_READTEXT: |
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| 212 | case RPT_READDATA:{ |
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| 213 | diag = safeMemRead (addr, addr2, data); |
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| 214 | if (diag == 0) |
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| 215 | return 0; |
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| 216 | goto mem_error; |
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| 217 | } |
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| 218 | case RPT_WRITETEXT: |
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| 219 | case RPT_WRITEDATA:{ |
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| 220 | diag = safeMemWrite (addr2, addr, data); |
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| 221 | if (diag == 0) |
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| 222 | return 0; |
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| 223 | goto mem_error; |
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| 224 | } |
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| 225 | |
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| 226 | case RPT_GETTARGETTHREAD: |
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| 227 | if (!NbExceptCtx) { |
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| 228 | errno = EBUSY; |
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| 229 | return -1; |
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| 230 | } |
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| 231 | return currentTargetThread; |
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| 232 | |
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| 233 | case RPT_SETTARGETTHREAD: |
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| 234 | if (!NbExceptCtx) { |
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| 235 | errno = EBUSY; |
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| 236 | return -1; |
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| 237 | } |
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| 238 | currentTargetThread = data; |
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| 239 | return 0; |
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| 240 | |
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| 241 | case RPT_GETTHREADNAME:{ |
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| 242 | return TgtGetThreadName (NULL, (unsigned) (data), (char *) addr); |
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| 243 | } |
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| 244 | |
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| 245 | case RPT_THREADLIST:{ |
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| 246 | int count = TgtThreadList (NULL, (unsigned *) addr, UTHREAD_MAX |
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| 247 | * sizeof (unsigned)); |
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| 248 | if (count < 0) { |
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| 249 | errno = EINVAL; |
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| 250 | return -1; |
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| 251 | } |
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| 252 | return count; |
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| 253 | } |
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| 254 | |
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| 255 | case RPT_SETTHREADREGS:{ |
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| 256 | Exception_context *ctx; |
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| 257 | CPU_Exception_frame Ectx; |
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| 258 | Thread_Control *thread; |
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| 259 | rtems_id id; |
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| 260 | |
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| 261 | rtems_task_ident (RTEMS_SELF, RTEMS_SEARCH_ALL_NODES, &id); |
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| 262 | if (data == (unsigned) id) |
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| 263 | break; |
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| 264 | |
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| 265 | if ((ctx = GetExceptCtx (data)) != NULL) { |
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| 266 | RegsToCtx ((xdr_regs *) addr, ctx->ctx); |
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| 267 | return 0; |
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| 268 | } |
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| 269 | thread = Thread_Get_RDBG ((Objects_Id) (data)); |
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| 270 | if (thread != NULL) { |
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| 271 | RegsToCtx ((xdr_regs *) addr, &Ectx); |
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| 272 | set_ctx_thread (thread, &Ectx); |
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| 273 | return 0; |
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| 274 | } |
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| 275 | break; |
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| 276 | } |
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| 277 | |
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| 278 | case RPT_GETTHREADREGS:{ |
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| 279 | Exception_context *ctx; |
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| 280 | CPU_Exception_frame Ectx; |
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| 281 | Thread_Control *thread; |
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| 282 | rtems_id id; |
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| 283 | |
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| 284 | rtems_task_ident (RTEMS_SELF, RTEMS_SEARCH_ALL_NODES, &id); |
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| 285 | if (data == (unsigned) id) { |
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| 286 | justSaveContext = 1; |
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| 287 | enterRdbg (); |
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| 288 | CtxToRegs (&(SavedContext), (xdr_regs *) addr); |
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| 289 | return 0; |
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| 290 | } |
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| 291 | |
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| 292 | if ((ctx = GetExceptCtx (data)) != NULL) { |
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| 293 | CtxToRegs (ctx->ctx, (xdr_regs *) addr); |
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| 294 | return 0; |
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| 295 | } |
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| 296 | thread = Thread_Get_RDBG ((Objects_Id) (data)); |
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| 297 | if (thread != NULL) { |
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| 298 | get_ctx_thread (thread, &Ectx); |
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| 299 | CtxToRegs (&Ectx, (xdr_regs *) addr); |
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| 300 | return 0; |
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| 301 | } |
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| 302 | break; |
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| 303 | } |
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| 304 | |
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| 305 | case RPT_KILL: |
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| 306 | TotalReboot = 1; |
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| 307 | return 0; |
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| 308 | |
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| 309 | case RPT_TRACEME: |
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| 310 | case RPT_PEEKUSER: |
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| 311 | case RPT_POKEUSER: |
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| 312 | case RPT_GETFPREGS: |
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| 313 | case RPT_SETFPREGS: |
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| 314 | case RPT_GETFPAREGS: |
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| 315 | case RPT_SETFPAREGS: |
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| 316 | case RPT_SYSCALL: |
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| 317 | case RPT_DUMPCORE: |
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| 318 | case RPT_GETUCODE: |
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| 319 | case RPT_THREADSUSPEND: |
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| 320 | case RPT_THREADRESUME: |
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| 321 | case RPT_SETTHREADNAME: |
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| 322 | default: |
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| 323 | break; |
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| 324 | } |
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| 325 | errno = EINVAL; |
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| 326 | return -1; |
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[4721cf1] | 327 | } |
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