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https://github.com/brain-hackers/u-boot-brain
synced 2024-08-20 17:08:52 +09:00
![Simon Glass](/assets/img/avatar_default.png)
Some sandbox files are not built with U-Boot headers, so with the renamed malloc functions there is now no need to use the special os_... allocation functions to access the system routines. Instead we can just call them directly. Update the affected files accordingly. Signed-off-by: Simon Glass <sjg@chromium.org>
830 lines
16 KiB
C
830 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2011 The Chromium OS Authors.
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*/
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <setjmp.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include <time.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <linux/types.h>
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#include <asm/getopt.h>
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#include <asm/sections.h>
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#include <asm/state.h>
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#include <os.h>
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#include <rtc_def.h>
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/* Operating System Interface */
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struct os_mem_hdr {
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size_t length; /* number of bytes in the block */
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};
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ssize_t os_read(int fd, void *buf, size_t count)
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{
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return read(fd, buf, count);
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}
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ssize_t os_write(int fd, const void *buf, size_t count)
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{
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return write(fd, buf, count);
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}
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off_t os_lseek(int fd, off_t offset, int whence)
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{
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if (whence == OS_SEEK_SET)
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whence = SEEK_SET;
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else if (whence == OS_SEEK_CUR)
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whence = SEEK_CUR;
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else if (whence == OS_SEEK_END)
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whence = SEEK_END;
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else
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os_exit(1);
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return lseek(fd, offset, whence);
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}
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int os_open(const char *pathname, int os_flags)
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{
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int flags;
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switch (os_flags & OS_O_MASK) {
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case OS_O_RDONLY:
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default:
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flags = O_RDONLY;
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break;
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case OS_O_WRONLY:
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flags = O_WRONLY;
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break;
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case OS_O_RDWR:
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flags = O_RDWR;
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break;
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}
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if (os_flags & OS_O_CREAT)
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flags |= O_CREAT;
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if (os_flags & OS_O_TRUNC)
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flags |= O_TRUNC;
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return open(pathname, flags, 0777);
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}
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int os_close(int fd)
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{
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return close(fd);
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}
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int os_unlink(const char *pathname)
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{
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return unlink(pathname);
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}
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void os_exit(int exit_code)
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{
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exit(exit_code);
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}
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int os_write_file(const char *fname, const void *buf, int size)
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{
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int fd;
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fd = os_open(fname, OS_O_WRONLY | OS_O_CREAT | OS_O_TRUNC);
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if (fd < 0) {
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printf("Cannot open file '%s'\n", fname);
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return -EIO;
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}
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if (os_write(fd, buf, size) != size) {
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printf("Cannot write to file '%s'\n", fname);
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os_close(fd);
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return -EIO;
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}
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os_close(fd);
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return 0;
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}
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int os_read_file(const char *fname, void **bufp, int *sizep)
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{
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off_t size;
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int ret = -EIO;
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int fd;
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fd = os_open(fname, OS_O_RDONLY);
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if (fd < 0) {
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printf("Cannot open file '%s'\n", fname);
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goto err;
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}
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size = os_lseek(fd, 0, OS_SEEK_END);
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if (size < 0) {
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printf("Cannot seek to end of file '%s'\n", fname);
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goto err;
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}
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if (os_lseek(fd, 0, OS_SEEK_SET) < 0) {
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printf("Cannot seek to start of file '%s'\n", fname);
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goto err;
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}
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*bufp = malloc(size);
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if (!*bufp) {
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printf("Not enough memory to read file '%s'\n", fname);
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ret = -ENOMEM;
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goto err;
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}
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if (os_read(fd, *bufp, size) != size) {
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printf("Cannot read from file '%s'\n", fname);
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goto err;
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}
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os_close(fd);
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*sizep = size;
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return 0;
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err:
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os_close(fd);
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return ret;
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}
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/* Restore tty state when we exit */
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static struct termios orig_term;
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static bool term_setup;
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static bool term_nonblock;
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void os_fd_restore(void)
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{
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if (term_setup) {
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int flags;
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tcsetattr(0, TCSANOW, &orig_term);
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if (term_nonblock) {
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flags = fcntl(0, F_GETFL, 0);
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fcntl(0, F_SETFL, flags & ~O_NONBLOCK);
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}
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term_setup = false;
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}
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}
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/* Put tty into raw mode so <tab> and <ctrl+c> work */
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void os_tty_raw(int fd, bool allow_sigs)
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{
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struct termios term;
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int flags;
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if (term_setup)
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return;
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/* If not a tty, don't complain */
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if (tcgetattr(fd, &orig_term))
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return;
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term = orig_term;
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term.c_iflag = IGNBRK | IGNPAR;
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term.c_oflag = OPOST | ONLCR;
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term.c_cflag = CS8 | CREAD | CLOCAL;
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term.c_lflag = allow_sigs ? ISIG : 0;
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if (tcsetattr(fd, TCSANOW, &term))
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return;
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flags = fcntl(fd, F_GETFL, 0);
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if (!(flags & O_NONBLOCK)) {
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if (fcntl(fd, F_SETFL, flags | O_NONBLOCK))
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return;
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term_nonblock = true;
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}
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term_setup = true;
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atexit(os_fd_restore);
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}
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void *os_malloc(size_t length)
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{
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int page_size = getpagesize();
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struct os_mem_hdr *hdr;
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/*
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* Use an address that is hopefully available to us so that pointers
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* to this memory are fairly obvious. If we end up with a different
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* address, that's fine too.
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*/
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hdr = mmap((void *)0x10000000, length + page_size,
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PROT_READ | PROT_WRITE | PROT_EXEC,
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MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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if (hdr == MAP_FAILED)
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return NULL;
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hdr->length = length;
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return (void *)hdr + page_size;
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}
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void os_free(void *ptr)
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{
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int page_size = getpagesize();
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struct os_mem_hdr *hdr;
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if (ptr) {
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hdr = ptr - page_size;
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munmap(hdr, hdr->length + page_size);
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}
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}
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void *os_realloc(void *ptr, size_t length)
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{
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int page_size = getpagesize();
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struct os_mem_hdr *hdr;
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void *buf = NULL;
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if (length) {
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buf = os_malloc(length);
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if (!buf)
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return buf;
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if (ptr) {
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hdr = ptr - page_size;
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if (length > hdr->length)
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length = hdr->length;
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memcpy(buf, ptr, length);
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}
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}
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if (ptr)
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os_free(ptr);
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return buf;
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}
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void os_usleep(unsigned long usec)
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{
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usleep(usec);
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}
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uint64_t __attribute__((no_instrument_function)) os_get_nsec(void)
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{
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#if defined(CLOCK_MONOTONIC) && defined(_POSIX_MONOTONIC_CLOCK)
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struct timespec tp;
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if (EINVAL == clock_gettime(CLOCK_MONOTONIC, &tp)) {
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struct timeval tv;
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gettimeofday(&tv, NULL);
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tp.tv_sec = tv.tv_sec;
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tp.tv_nsec = tv.tv_usec * 1000;
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}
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return tp.tv_sec * 1000000000ULL + tp.tv_nsec;
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#else
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struct timeval tv;
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gettimeofday(&tv, NULL);
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return tv.tv_sec * 1000000000ULL + tv.tv_usec * 1000;
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#endif
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}
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static char *short_opts;
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static struct option *long_opts;
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int os_parse_args(struct sandbox_state *state, int argc, char *argv[])
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{
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struct sandbox_cmdline_option **sb_opt = __u_boot_sandbox_option_start;
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size_t num_options = __u_boot_sandbox_option_count();
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size_t i;
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int hidden_short_opt;
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size_t si;
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int c;
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if (short_opts || long_opts)
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return 1;
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state->argc = argc;
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state->argv = argv;
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/* dynamically construct the arguments to the system getopt_long */
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short_opts = malloc(sizeof(*short_opts) * num_options * 2 + 1);
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long_opts = malloc(sizeof(*long_opts) * num_options);
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if (!short_opts || !long_opts)
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return 1;
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/*
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* getopt_long requires "val" to be unique (since that is what the
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* func returns), so generate unique values automatically for flags
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* that don't have a short option. pick 0x100 as that is above the
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* single byte range (where ASCII/ISO-XXXX-X charsets live).
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*/
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hidden_short_opt = 0x100;
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si = 0;
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for (i = 0; i < num_options; ++i) {
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long_opts[i].name = sb_opt[i]->flag;
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long_opts[i].has_arg = sb_opt[i]->has_arg ?
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required_argument : no_argument;
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long_opts[i].flag = NULL;
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if (sb_opt[i]->flag_short) {
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short_opts[si++] = long_opts[i].val = sb_opt[i]->flag_short;
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if (long_opts[i].has_arg == required_argument)
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short_opts[si++] = ':';
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} else
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long_opts[i].val = sb_opt[i]->flag_short = hidden_short_opt++;
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}
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short_opts[si] = '\0';
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/* we need to handle output ourselves since u-boot provides printf */
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opterr = 0;
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/*
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* walk all of the options the user gave us on the command line,
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* figure out what u-boot option structure they belong to (via
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* the unique short val key), and call the appropriate callback.
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*/
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while ((c = getopt_long(argc, argv, short_opts, long_opts, NULL)) != -1) {
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for (i = 0; i < num_options; ++i) {
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if (sb_opt[i]->flag_short == c) {
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if (sb_opt[i]->callback(state, optarg)) {
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state->parse_err = sb_opt[i]->flag;
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return 0;
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}
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break;
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}
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}
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if (i == num_options) {
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/*
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* store the faulting flag for later display. we have to
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* store the flag itself as the getopt parsing itself is
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* tricky: need to handle the following flags (assume all
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* of the below are unknown):
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* -a optopt='a' optind=<next>
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* -abbbb optopt='a' optind=<this>
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* -aaaaa optopt='a' optind=<this>
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* --a optopt=0 optind=<this>
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* as you can see, it is impossible to determine the exact
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* faulting flag without doing the parsing ourselves, so
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* we just report the specific flag that failed.
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*/
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if (optopt) {
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static char parse_err[3] = { '-', 0, '\0', };
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parse_err[1] = optopt;
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state->parse_err = parse_err;
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} else
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state->parse_err = argv[optind - 1];
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break;
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}
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}
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return 0;
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}
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void os_dirent_free(struct os_dirent_node *node)
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{
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struct os_dirent_node *next;
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while (node) {
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next = node->next;
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free(node);
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node = next;
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}
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}
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int os_dirent_ls(const char *dirname, struct os_dirent_node **headp)
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{
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struct dirent *entry;
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struct os_dirent_node *head, *node, *next;
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struct stat buf;
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DIR *dir;
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int ret;
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char *fname;
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char *old_fname;
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int len;
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int dirlen;
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*headp = NULL;
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dir = opendir(dirname);
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if (!dir)
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return -1;
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/* Create a buffer upfront, with typically sufficient size */
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dirlen = strlen(dirname) + 2;
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len = dirlen + 256;
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fname = malloc(len);
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if (!fname) {
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ret = -ENOMEM;
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goto done;
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}
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for (node = head = NULL;; node = next) {
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errno = 0;
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entry = readdir(dir);
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if (!entry) {
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ret = errno;
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break;
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}
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next = malloc(sizeof(*node) + strlen(entry->d_name) + 1);
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if (!next) {
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os_dirent_free(head);
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ret = -ENOMEM;
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goto done;
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}
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if (dirlen + strlen(entry->d_name) > len) {
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len = dirlen + strlen(entry->d_name);
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old_fname = fname;
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fname = realloc(fname, len);
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if (!fname) {
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free(old_fname);
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free(next);
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os_dirent_free(head);
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ret = -ENOMEM;
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goto done;
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}
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}
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next->next = NULL;
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strcpy(next->name, entry->d_name);
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switch (entry->d_type) {
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case DT_REG:
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next->type = OS_FILET_REG;
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break;
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case DT_DIR:
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next->type = OS_FILET_DIR;
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break;
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case DT_LNK:
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next->type = OS_FILET_LNK;
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break;
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default:
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next->type = OS_FILET_UNKNOWN;
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}
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next->size = 0;
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snprintf(fname, len, "%s/%s", dirname, next->name);
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if (!stat(fname, &buf))
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next->size = buf.st_size;
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if (node)
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node->next = next;
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else
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head = next;
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}
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*headp = head;
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done:
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closedir(dir);
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free(fname);
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return ret;
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}
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const char *os_dirent_typename[OS_FILET_COUNT] = {
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" ",
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"SYM",
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"DIR",
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"???",
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};
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const char *os_dirent_get_typename(enum os_dirent_t type)
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{
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if (type >= OS_FILET_REG && type < OS_FILET_COUNT)
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return os_dirent_typename[type];
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return os_dirent_typename[OS_FILET_UNKNOWN];
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}
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int os_get_filesize(const char *fname, loff_t *size)
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{
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struct stat buf;
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int ret;
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ret = stat(fname, &buf);
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if (ret)
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return ret;
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*size = buf.st_size;
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return 0;
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}
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void os_putc(int ch)
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{
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putchar(ch);
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}
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void os_puts(const char *str)
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{
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while (*str)
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os_putc(*str++);
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}
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int os_write_ram_buf(const char *fname)
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{
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struct sandbox_state *state = state_get_current();
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int fd, ret;
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fd = open(fname, O_CREAT | O_WRONLY, 0777);
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if (fd < 0)
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return -ENOENT;
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ret = write(fd, state->ram_buf, state->ram_size);
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close(fd);
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if (ret != state->ram_size)
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return -EIO;
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return 0;
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}
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int os_read_ram_buf(const char *fname)
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{
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struct sandbox_state *state = state_get_current();
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int fd, ret;
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loff_t size;
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ret = os_get_filesize(fname, &size);
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if (ret < 0)
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return ret;
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if (size != state->ram_size)
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return -ENOSPC;
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fd = open(fname, O_RDONLY);
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if (fd < 0)
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return -ENOENT;
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ret = read(fd, state->ram_buf, state->ram_size);
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close(fd);
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if (ret != state->ram_size)
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return -EIO;
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return 0;
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}
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static int make_exec(char *fname, const void *data, int size)
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{
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int fd;
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|
strcpy(fname, "/tmp/u-boot.jump.XXXXXX");
|
|
fd = mkstemp(fname);
|
|
if (fd < 0)
|
|
return -ENOENT;
|
|
if (write(fd, data, size) < 0)
|
|
return -EIO;
|
|
close(fd);
|
|
if (chmod(fname, 0777))
|
|
return -ENOEXEC;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* add_args() - Allocate a new argv with the given args
|
|
*
|
|
* This is used to create a new argv array with all the old arguments and some
|
|
* new ones that are passed in
|
|
*
|
|
* @argvp: Returns newly allocated args list
|
|
* @add_args: Arguments to add, each a string
|
|
* @count: Number of arguments in @add_args
|
|
* @return 0 if OK, -ENOMEM if out of memory
|
|
*/
|
|
static int add_args(char ***argvp, char *add_args[], int count)
|
|
{
|
|
char **argv, **ap;
|
|
int argc;
|
|
|
|
for (argc = 0; (*argvp)[argc]; argc++)
|
|
;
|
|
|
|
argv = malloc((argc + count + 1) * sizeof(char *));
|
|
if (!argv) {
|
|
printf("Out of memory for %d argv\n", count);
|
|
return -ENOMEM;
|
|
}
|
|
for (ap = *argvp, argc = 0; *ap; ap++) {
|
|
char *arg = *ap;
|
|
|
|
/* Drop args that we don't want to propagate */
|
|
if (*arg == '-' && strlen(arg) == 2) {
|
|
switch (arg[1]) {
|
|
case 'j':
|
|
case 'm':
|
|
ap++;
|
|
continue;
|
|
}
|
|
} else if (!strcmp(arg, "--rm_memory")) {
|
|
ap++;
|
|
continue;
|
|
}
|
|
argv[argc++] = arg;
|
|
}
|
|
|
|
memcpy(argv + argc, add_args, count * sizeof(char *));
|
|
argv[argc + count] = NULL;
|
|
|
|
*argvp = argv;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* os_jump_to_file() - Jump to a new program
|
|
*
|
|
* This saves the memory buffer, sets up arguments to the new process, then
|
|
* execs it.
|
|
*
|
|
* @fname: Filename to exec
|
|
* @return does not return on success, any return value is an error
|
|
*/
|
|
static int os_jump_to_file(const char *fname)
|
|
{
|
|
struct sandbox_state *state = state_get_current();
|
|
char mem_fname[30];
|
|
int fd, err;
|
|
char *extra_args[5];
|
|
char **argv = state->argv;
|
|
int argc;
|
|
#ifdef DEBUG
|
|
int i;
|
|
#endif
|
|
|
|
strcpy(mem_fname, "/tmp/u-boot.mem.XXXXXX");
|
|
fd = mkstemp(mem_fname);
|
|
if (fd < 0)
|
|
return -ENOENT;
|
|
close(fd);
|
|
err = os_write_ram_buf(mem_fname);
|
|
if (err)
|
|
return err;
|
|
|
|
os_fd_restore();
|
|
|
|
extra_args[0] = "-j";
|
|
extra_args[1] = (char *)fname;
|
|
extra_args[2] = "-m";
|
|
extra_args[3] = mem_fname;
|
|
argc = 4;
|
|
if (state->ram_buf_rm)
|
|
extra_args[argc++] = "--rm_memory";
|
|
err = add_args(&argv, extra_args, argc);
|
|
if (err)
|
|
return err;
|
|
argv[0] = (char *)fname;
|
|
|
|
#ifdef DEBUG
|
|
for (i = 0; argv[i]; i++)
|
|
printf("%d %s\n", i, argv[i]);
|
|
#endif
|
|
|
|
if (state_uninit())
|
|
os_exit(2);
|
|
|
|
err = execv(fname, argv);
|
|
free(argv);
|
|
if (err) {
|
|
perror("Unable to run image");
|
|
printf("Image filename '%s'\n", fname);
|
|
return err;
|
|
}
|
|
|
|
return unlink(fname);
|
|
}
|
|
|
|
int os_jump_to_image(const void *dest, int size)
|
|
{
|
|
char fname[30];
|
|
int err;
|
|
|
|
err = make_exec(fname, dest, size);
|
|
if (err)
|
|
return err;
|
|
|
|
return os_jump_to_file(fname);
|
|
}
|
|
|
|
int os_find_u_boot(char *fname, int maxlen)
|
|
{
|
|
struct sandbox_state *state = state_get_current();
|
|
const char *progname = state->argv[0];
|
|
int len = strlen(progname);
|
|
const char *suffix;
|
|
char *p;
|
|
int fd;
|
|
|
|
if (len >= maxlen || len < 4)
|
|
return -ENOSPC;
|
|
|
|
strcpy(fname, progname);
|
|
suffix = fname + len - 4;
|
|
|
|
/* If we are TPL, boot to SPL */
|
|
if (!strcmp(suffix, "-tpl")) {
|
|
fname[len - 3] = 's';
|
|
fd = os_open(fname, O_RDONLY);
|
|
if (fd >= 0) {
|
|
close(fd);
|
|
return 0;
|
|
}
|
|
|
|
/* Look for 'u-boot-tpl' in the tpl/ directory */
|
|
p = strstr(fname, "/tpl/");
|
|
if (p) {
|
|
p[1] = 's';
|
|
fd = os_open(fname, O_RDONLY);
|
|
if (fd >= 0) {
|
|
close(fd);
|
|
return 0;
|
|
}
|
|
}
|
|
return -ENOENT;
|
|
}
|
|
|
|
/* Look for 'u-boot' in the same directory as 'u-boot-spl' */
|
|
if (!strcmp(suffix, "-spl")) {
|
|
fname[len - 4] = '\0';
|
|
fd = os_open(fname, O_RDONLY);
|
|
if (fd >= 0) {
|
|
close(fd);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Look for 'u-boot' in the parent directory of spl/ */
|
|
p = strstr(fname, "spl/");
|
|
if (p) {
|
|
/* Remove the "spl" characters */
|
|
memmove(p, p + 4, strlen(p + 4) + 1);
|
|
fd = os_open(fname, O_RDONLY);
|
|
if (fd >= 0) {
|
|
close(fd);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -ENOENT;
|
|
}
|
|
|
|
int os_spl_to_uboot(const char *fname)
|
|
{
|
|
return os_jump_to_file(fname);
|
|
}
|
|
|
|
void os_localtime(struct rtc_time *rt)
|
|
{
|
|
time_t t = time(NULL);
|
|
struct tm *tm;
|
|
|
|
tm = localtime(&t);
|
|
rt->tm_sec = tm->tm_sec;
|
|
rt->tm_min = tm->tm_min;
|
|
rt->tm_hour = tm->tm_hour;
|
|
rt->tm_mday = tm->tm_mday;
|
|
rt->tm_mon = tm->tm_mon + 1;
|
|
rt->tm_year = tm->tm_year + 1900;
|
|
rt->tm_wday = tm->tm_wday;
|
|
rt->tm_yday = tm->tm_yday;
|
|
rt->tm_isdst = tm->tm_isdst;
|
|
}
|
|
|
|
void os_abort(void)
|
|
{
|
|
abort();
|
|
}
|
|
|
|
int os_mprotect_allow(void *start, size_t len)
|
|
{
|
|
int page_size = getpagesize();
|
|
|
|
/* Move start to the start of a page, len to the end */
|
|
start = (void *)(((ulong)start) & ~(page_size - 1));
|
|
len = (len + page_size * 2) & ~(page_size - 1);
|
|
|
|
return mprotect(start, len, PROT_READ | PROT_WRITE);
|
|
}
|
|
|
|
void *os_find_text_base(void)
|
|
{
|
|
char line[500];
|
|
void *base = NULL;
|
|
int len;
|
|
int fd;
|
|
|
|
/*
|
|
* This code assumes that the first line of /proc/self/maps holds
|
|
* information about the text, for example:
|
|
*
|
|
* 5622d9907000-5622d9a55000 r-xp 00000000 08:01 15067168 u-boot
|
|
*
|
|
* The first hex value is assumed to be the address.
|
|
*
|
|
* This is tested in Linux 4.15.
|
|
*/
|
|
fd = open("/proc/self/maps", O_RDONLY);
|
|
if (fd == -1)
|
|
return NULL;
|
|
len = read(fd, line, sizeof(line));
|
|
if (len > 0) {
|
|
char *end = memchr(line, '-', len);
|
|
|
|
if (end) {
|
|
uintptr_t addr;
|
|
|
|
*end = '\0';
|
|
if (sscanf(line, "%zx", &addr) == 1)
|
|
base = (void *)addr;
|
|
}
|
|
}
|
|
close(fd);
|
|
|
|
return base;
|
|
}
|