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- /*
- * module.c
- *
- * Copyright (C) 2018 Aleksandar Andrejevic <theflash@sdf.lonestar.org>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
- #include <module.h>
- #include <exec/elf.h>
- #include <memory.h>
- extern dword_t load_module_elf(const void *address, module_t *module);
- typedef dword_t (*driver_load_proc_t)(const char *parameters);
- char driver_name[] = "kernel";
- static DECLARE_LIST(modules);
- module_t *get_module_from_address(void *address)
- {
- uintptr_t addr = (uintptr_t)address;
- list_entry_t *i, *j;
- for (i = modules.next; i != &modules; i = i->next)
- {
- module_t *module = CONTAINER_OF(i, module_t, link);
- for (j = module->segments.next; j != &module->segments; j = j->next)
- {
- module_segment_t *segment = CONTAINER_OF(j, module_segment_t, link);
- if (addr >= (uintptr_t)segment->address && addr < ((uintptr_t)segment->address + segment->size)) return module;
- }
- }
- return NULL;
- }
- dword_t module_load_from_physical(module_t *module, const char *parameters)
- {
- module->name = NULL;
- module->load_proc = NULL;
- module->unload_proc = NULL;
- list_init(&module->segments);
- void *address = NULL;
- dword_t ret = map_memory((void*)module->physical_address, &address, module->size, MEMORY_BLOCK_ACCESSIBLE);
- if (ret != ERR_SUCCESS) return ret;
- ret = load_module_elf(address, module);
- if (ret != ERR_SUCCESS) goto cleanup;
- if (!module->name)
- {
- // TODO
- return ERR_INVALID;
- }
- ret = module->load_proc(parameters);
- if (ret != ERR_SUCCESS)
- {
- // TODO
- return ret;
- }
- list_append(&modules, &module->link);
- cleanup:
- unmap_memory(address);
- return ret;
- }
- dword_t module_unload(module_t *module)
- {
- return ERR_NOSYSCALL; // TODO
- }
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