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| /* |
| * Copyright (c) 2001-2004 Jakub Jermar |
| * Copyright (c) 2008 Jiri Svoboda |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup genericproc |
| * @{ |
| */ |
| |
| /** |
| * @file |
| * @brief Running userspace programs. |
| */ |
| |
| #include <main/uinit.h> |
| #include <proc/thread.h> |
| #include <proc/task.h> |
| #include <proc/uarg.h> |
| #include <mm/as.h> |
| #include <mm/slab.h> |
| #include <arch.h> |
| #include <adt/list.h> |
| #include <ipc/ipc.h> |
| #include <ipc/ipcrsc.h> |
| #include <security/cap.h> |
| #include <lib/elf.h> |
| #include <errno.h> |
| #include <print.h> |
| #include <syscall/copy.h> |
| #include <proc/program.h> |
| |
| #ifndef LOADED_PROG_STACK_PAGES_NO |
| #define LOADED_PROG_STACK_PAGES_NO 1 |
| #endif |
| |
| /** |
| * Points to the binary image used as the program loader. All non-initial |
| * tasks are created from this executable image. |
| */ |
| void *program_loader = NULL; |
| |
| /** Create a program using an existing address space. |
| * |
| * @param as Address space containing a binary program image. |
| * @param entry_addr Program entry-point address in program address space. |
| * @param p Buffer for storing program information. |
| */ |
| void program_create(as_t *as, uintptr_t entry_addr, program_t *p) |
| { |
| as_area_t *a; |
| uspace_arg_t *kernel_uarg; |
| |
| kernel_uarg = (uspace_arg_t *) malloc(sizeof(uspace_arg_t), 0); |
| kernel_uarg->uspace_entry = (void *) entry_addr; |
| kernel_uarg->uspace_stack = (void *) USTACK_ADDRESS; |
| kernel_uarg->uspace_thread_function = NULL; |
| kernel_uarg->uspace_thread_arg = NULL; |
| kernel_uarg->uspace_uarg = NULL; |
| |
| p->task = task_create(as, "app"); |
| ASSERT(p->task); |
| |
| /* |
| * Create the data as_area. |
| */ |
| a = as_area_create(as, AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE, |
| LOADED_PROG_STACK_PAGES_NO * PAGE_SIZE, USTACK_ADDRESS, |
| AS_AREA_ATTR_NONE, &anon_backend, NULL); |
| |
| /* |
| * Create the main thread. |
| */ |
| p->main_thread = thread_create(uinit, kernel_uarg, p->task, |
| THREAD_FLAG_USPACE, "uinit", false); |
| ASSERT(p->main_thread); |
| } |
| |
| /** Parse an executable image in the kernel memory. |
| * |
| * If the image belongs to a program loader, it is registered as such, |
| * (and *task is set to NULL). Otherwise a task is created from the |
| * executable image. The task is returned in *task. |
| * |
| * @param image_addr Address of an executable program image. |
| * @param p Buffer for storing program info. If image_addr |
| * points to a loader image, p->task will be set to |
| * NULL and EOK will be returned. |
| * |
| * @return EOK on success or negative error code. |
| */ |
| int program_create_from_image(void *image_addr, program_t *p) |
| { |
| as_t *as; |
| unsigned int rc; |
| |
| as = as_create(0); |
| ASSERT(as); |
| |
| rc = elf_load((elf_header_t *) image_addr, as, 0); |
| if (rc != EE_OK) { |
| as_destroy(as); |
| p->task = NULL; |
| p->main_thread = NULL; |
| if (rc != EE_LOADER) |
| return ENOTSUP; |
| |
| /* Register image as the program loader */ |
| ASSERT(program_loader == NULL); |
| program_loader = image_addr; |
| printf("Registered program loader at 0x%" PRIp "\n", |
| image_addr); |
| return EOK; |
| } |
| |
| program_create(as, ((elf_header_t *) image_addr)->e_entry, p); |
| |
| return EOK; |
| } |
| |
| /** Create a task from the program loader image. |
| * |
| * @param p Buffer for storing program info. |
| * @return EOK on success or negative error code. |
| */ |
| int program_create_loader(program_t *p) |
| { |
| as_t *as; |
| unsigned int rc; |
| void *loader; |
| |
| as = as_create(0); |
| ASSERT(as); |
| |
| loader = program_loader; |
| if (!loader) { |
| printf("Cannot spawn loader as none was registered\n"); |
| return ENOENT; |
| } |
| |
| rc = elf_load((elf_header_t *) program_loader, as, ELD_F_LOADER); |
| if (rc != EE_OK) { |
| as_destroy(as); |
| return ENOENT; |
| } |
| |
| program_create(as, ((elf_header_t *) program_loader)->e_entry, p); |
| |
| return EOK; |
| } |
| |
| /** Make program ready. |
| * |
| * Switch program's main thread to the ready state. |
| * |
| * @param p Program to make ready. |
| */ |
| void program_ready(program_t *p) |
| { |
| thread_ready(p->main_thread); |
| } |
| |
| /** Syscall for creating a new loader instance from userspace. |
| * |
| * Creates a new task from the program loader image, connects a phone |
| * to it and stores the phone id into the provided buffer. |
| * |
| * @param uspace_phone_id Userspace address where to store the phone id. |
| * |
| * @return 0 on success or an error code from @ref errno.h. |
| */ |
| unative_t sys_program_spawn_loader(int *uspace_phone_id) |
| { |
| program_t p; |
| int fake_id; |
| int rc; |
| int phone_id; |
| |
| fake_id = 0; |
| |
| /* Before we even try creating the task, see if we can write the id */ |
| rc = (unative_t) copy_to_uspace(uspace_phone_id, &fake_id, |
| sizeof(fake_id)); |
| if (rc != 0) |
| return rc; |
| |
| phone_id = phone_alloc(); |
| if (phone_id < 0) |
| return ELIMIT; |
| |
| rc = program_create_loader(&p); |
| if (rc != 0) |
| return rc; |
| |
| phone_connect(phone_id, &p.task->answerbox); |
| |
| /* No need to aquire lock before task_ready() */ |
| rc = (unative_t) copy_to_uspace(uspace_phone_id, &phone_id, |
| sizeof(phone_id)); |
| if (rc != 0) { |
| /* Ooops */ |
| ipc_phone_hangup(&TASK->phones[phone_id]); |
| task_kill(p.task->taskid); |
| return rc; |
| } |
| |
| // FIXME: control the capabilities |
| cap_set(p.task, cap_get(TASK)); |
| |
| program_ready(&p); |
| |
| return EOK; |
| } |
| |
| /** @} |
| */ |