target: check memory handlers before use for all types

[openocd.git] / src / target / target.c

diff --git a/src/target/target.c b/src/target/target.c
index a8d3cba96f1fc536eb364f4f0c5c4998e66b5eba..89fee4aaa5fa7899fed3dfd96ee448bd734ab997 100644 (file)
--- a/src/target/target.c
+++ b/src/target/target.c
@@ -486,7 +486,7 @@ struct target *get_target(const char *id)
 }
 
 /* returns a pointer to the n-th configured target */
-static struct target *get_target_by_num(int num)
+struct target *get_target_by_num(int num)
 {
        struct target *target = all_targets;
 
@@ -938,7 +938,7 @@ int target_run_flash_async_algorithm(struct target *target,
                        break;
                }
 
-               if ((rp & (block_size - 1)) || rp < fifo_start_addr || rp >= fifo_end_addr) {
+               if (((rp - fifo_start_addr) & (block_size - 1)) || rp < fifo_start_addr || rp >= fifo_end_addr) {
                        LOG_ERROR("corrupted fifo read pointer 0x%" PRIx32, rp);
                        break;
                }
@@ -1021,6 +1021,10 @@ int target_read_memory(struct target *target,
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }
+       if (!target->type->read_memory) {
+               LOG_ERROR("Target %s doesn't support read_memory", target_name(target));
+               return ERROR_FAIL;
+       }
        return target->type->read_memory(target, address, size, count, buffer);
 }
 
@@ -1031,6 +1035,10 @@ int target_read_phys_memory(struct target *target,
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }
+       if (!target->type->read_phys_memory) {
+               LOG_ERROR("Target %s doesn't support read_phys_memory", target_name(target));
+               return ERROR_FAIL;
+       }
        return target->type->read_phys_memory(target, address, size, count, buffer);
 }
 
@@ -1041,6 +1049,10 @@ int target_write_memory(struct target *target,
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }
+       if (!target->type->write_memory) {
+               LOG_ERROR("Target %s doesn't support write_memory", target_name(target));
+               return ERROR_FAIL;
+       }
        return target->type->write_memory(target, address, size, count, buffer);
 }
 
@@ -1051,6 +1063,10 @@ int target_write_phys_memory(struct target *target,
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }
+       if (!target->type->write_phys_memory) {
+               LOG_ERROR("Target %s doesn't support write_phys_memory", target_name(target));
+               return ERROR_FAIL;
+       }
        return target->type->write_phys_memory(target, address, size, count, buffer);
 }
 
@@ -1172,20 +1188,6 @@ static void target_reset_examined(struct target *target)
        target->examined = false;
 }
 
-static int err_read_phys_memory(struct target *target, uint32_t address,
-               uint32_t size, uint32_t count, uint8_t *buffer)
-{
-       LOG_ERROR("Not implemented: %s", __func__);
-       return ERROR_FAIL;
-}
-
-static int err_write_phys_memory(struct target *target, uint32_t address,
-               uint32_t size, uint32_t count, const uint8_t *buffer)
-{
-       LOG_ERROR("Not implemented: %s", __func__);
-       return ERROR_FAIL;
-}
-
 static int handle_target(void *priv);
 
 static int target_init_one(struct command_context *cmd_ctx,
@@ -1212,16 +1214,6 @@ static int target_init_one(struct command_context *cmd_ctx,
         * implement it in stages, but warn if we need to do so.
         */
        if (type->mmu) {
-               if (type->write_phys_memory == NULL) {
-                       LOG_ERROR("type '%s' is missing write_phys_memory",
-                                       type->name);
-                       type->write_phys_memory = err_write_phys_memory;
-               }
-               if (type->read_phys_memory == NULL) {
-                       LOG_ERROR("type '%s' is missing read_phys_memory",
-                                       type->name);
-                       type->read_phys_memory = err_read_phys_memory;
-               }
                if (type->virt2phys == NULL) {
                        LOG_ERROR("type '%s' is missing virt2phys", type->name);
                        type->virt2phys = identity_virt2phys;
@@ -2522,29 +2514,27 @@ static int handle_target(void *priv)
                                        target->backoff.times *= 2;
                                        target->backoff.times++;
                                }
-                               LOG_USER("Polling target %s failed, GDB will be halted. Polling again in %dms",
-                                               target_name(target),
-                                               target->backoff.times * polling_interval);
 
                                /* Tell GDB to halt the debugger. This allows the user to
                                 * run monitor commands to handle the situation.
                                 */
                                target_call_event_callbacks(target, TARGET_EVENT_GDB_HALT);
-                               return retval;
                        }
-                       /* Since we succeeded, we reset backoff count */
                        if (target->backoff.times > 0) {
-                               LOG_USER("Polling target %s succeeded again, trying to reexamine", target_name(target));
+                               LOG_USER("Polling target %s failed, trying to reexamine", target_name(target));
                                target_reset_examined(target);
                                retval = target_examine_one(target);
                                /* Target examination could have failed due to unstable connection,
                                 * but we set the examined flag anyway to repoll it later */
                                if (retval != ERROR_OK) {
                                        target->examined = true;
+                                       LOG_USER("Examination failed, GDB will be halted. Polling again in %dms",
+                                                target->backoff.times * polling_interval);
                                        return retval;
                                }
                        }
 
+                       /* Since we succeeded, we reset backoff count */
                        target->backoff.times = 0;
                }
        }