blob: 57d04a45b22b7edf813629bbff4bb7c6e5bef255 [file] [log] [blame] [edit]
/*
* Copyright (c) 2011 The Chromium OS Authors.
* SPDX-License-Identifier: GPL-2.0+
*/
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <linux/types.h>
#include <asm/getopt.h>
#include <asm/sections.h>
#include <asm/state.h>
#include <os.h>
/* Operating System Interface */
struct os_mem_hdr {
size_t length; /* number of bytes in the block */
};
ssize_t os_read(int fd, void *buf, size_t count)
{
return read(fd, buf, count);
}
ssize_t os_read_no_block(int fd, void *buf, size_t count)
{
const int flags = fcntl(fd, F_GETFL, 0);
fcntl(fd, F_SETFL, flags | O_NONBLOCK);
return os_read(fd, buf, count);
}
ssize_t os_write(int fd, const void *buf, size_t count)
{
return write(fd, buf, count);
}
off_t os_lseek(int fd, off_t offset, int whence)
{
if (whence == OS_SEEK_SET)
whence = SEEK_SET;
else if (whence == OS_SEEK_CUR)
whence = SEEK_CUR;
else if (whence == OS_SEEK_END)
whence = SEEK_END;
else
os_exit(1);
return lseek(fd, offset, whence);
}
int os_open(const char *pathname, int os_flags)
{
int flags;
switch (os_flags & OS_O_MASK) {
case OS_O_RDONLY:
default:
flags = O_RDONLY;
break;
case OS_O_WRONLY:
flags = O_WRONLY;
break;
case OS_O_RDWR:
flags = O_RDWR;
break;
}
if (os_flags & OS_O_CREAT)
flags |= O_CREAT;
return open(pathname, flags, 0777);
}
int os_close(int fd)
{
return close(fd);
}
int os_unlink(const char *pathname)
{
return unlink(pathname);
}
void os_exit(int exit_code)
{
exit(exit_code);
}
/* Restore tty state when we exit */
static struct termios orig_term;
static bool term_setup;
static void os_fd_restore(void)
{
if (term_setup)
tcsetattr(0, TCSANOW, &orig_term);
}
/* Put tty into raw mode so <tab> and <ctrl+c> work */
void os_tty_raw(int fd, bool allow_sigs)
{
struct termios term;
if (term_setup)
return;
term_setup = true;
/* If not a tty, don't complain */
if (tcgetattr(fd, &orig_term))
return;
term = orig_term;
term.c_iflag = IGNBRK | IGNPAR;
term.c_oflag = OPOST | ONLCR;
term.c_cflag = CS8 | CREAD | CLOCAL;
term.c_lflag = allow_sigs ? ISIG : 0;
if (tcsetattr(fd, TCSANOW, &term))
return;
atexit(os_fd_restore);
}
void *os_malloc(size_t length)
{
struct os_mem_hdr *hdr;
hdr = mmap(NULL, length + sizeof(*hdr), PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (hdr == MAP_FAILED)
return NULL;
hdr->length = length;
return hdr + 1;
}
void os_free(void *ptr)
{
struct os_mem_hdr *hdr = ptr;
hdr--;
if (ptr)
munmap(hdr, hdr->length + sizeof(*hdr));
}
void *os_realloc(void *ptr, size_t length)
{
struct os_mem_hdr *hdr = ptr;
void *buf = NULL;
hdr--;
if (length != 0) {
buf = os_malloc(length);
if (!buf)
return buf;
if (ptr) {
if (length > hdr->length)
length = hdr->length;
memcpy(buf, ptr, length);
}
}
os_free(ptr);
return buf;
}
void os_usleep(unsigned long usec)
{
usleep(usec);
}
uint64_t __attribute__((no_instrument_function)) os_get_nsec(void)
{
#if defined(CLOCK_MONOTONIC) && defined(_POSIX_MONOTONIC_CLOCK)
struct timespec tp;
if (EINVAL == clock_gettime(CLOCK_MONOTONIC, &tp)) {
struct timeval tv;
gettimeofday(&tv, NULL);
tp.tv_sec = tv.tv_sec;
tp.tv_nsec = tv.tv_usec * 1000;
}
return tp.tv_sec * 1000000000ULL + tp.tv_nsec;
#else
struct timeval tv;
gettimeofday(&tv, NULL);
return tv.tv_sec * 1000000000ULL + tv.tv_usec * 1000;
#endif
}
static char *short_opts;
static struct option *long_opts;
int os_parse_args(struct sandbox_state *state, int argc, char *argv[])
{
struct sandbox_cmdline_option **sb_opt = __u_boot_sandbox_option_start;
size_t num_options = __u_boot_sandbox_option_count();
size_t i;
int hidden_short_opt;
size_t si;
int c;
if (short_opts || long_opts)
return 1;
state->argc = argc;
state->argv = argv;
/* dynamically construct the arguments to the system getopt_long */
short_opts = os_malloc(sizeof(*short_opts) * num_options * 2 + 1);
long_opts = os_malloc(sizeof(*long_opts) * num_options);
if (!short_opts || !long_opts)
return 1;
/*
* getopt_long requires "val" to be unique (since that is what the
* func returns), so generate unique values automatically for flags
* that don't have a short option. pick 0x100 as that is above the
* single byte range (where ASCII/ISO-XXXX-X charsets live).
*/
hidden_short_opt = 0x100;
si = 0;
for (i = 0; i < num_options; ++i) {
long_opts[i].name = sb_opt[i]->flag;
long_opts[i].has_arg = sb_opt[i]->has_arg ?
required_argument : no_argument;
long_opts[i].flag = NULL;
if (sb_opt[i]->flag_short) {
short_opts[si++] = long_opts[i].val = sb_opt[i]->flag_short;
if (long_opts[i].has_arg == required_argument)
short_opts[si++] = ':';
} else
long_opts[i].val = sb_opt[i]->flag_short = hidden_short_opt++;
}
short_opts[si] = '\0';
/* we need to handle output ourselves since u-boot provides printf */
opterr = 0;
/*
* walk all of the options the user gave us on the command line,
* figure out what u-boot option structure they belong to (via
* the unique short val key), and call the appropriate callback.
*/
while ((c = getopt_long(argc, argv, short_opts, long_opts, NULL)) != -1) {
for (i = 0; i < num_options; ++i) {
if (sb_opt[i]->flag_short == c) {
if (sb_opt[i]->callback(state, optarg)) {
state->parse_err = sb_opt[i]->flag;
return 0;
}
break;
}
}
if (i == num_options) {
/*
* store the faulting flag for later display. we have to
* store the flag itself as the getopt parsing itself is
* tricky: need to handle the following flags (assume all
* of the below are unknown):
* -a optopt='a' optind=<next>
* -abbbb optopt='a' optind=<this>
* -aaaaa optopt='a' optind=<this>
* --a optopt=0 optind=<this>
* as you can see, it is impossible to determine the exact
* faulting flag without doing the parsing ourselves, so
* we just report the specific flag that failed.
*/
if (optopt) {
static char parse_err[3] = { '-', 0, '\0', };
parse_err[1] = optopt;
state->parse_err = parse_err;
} else
state->parse_err = argv[optind - 1];
break;
}
}
return 0;
}
void os_dirent_free(struct os_dirent_node *node)
{
struct os_dirent_node *next;
while (node) {
next = node->next;
free(node);
node = next;
}
}
int os_dirent_ls(const char *dirname, struct os_dirent_node **headp)
{
struct dirent entry, *result;
struct os_dirent_node *head, *node, *next;
struct stat buf;
DIR *dir;
int ret;
char *fname;
int len;
*headp = NULL;
dir = opendir(dirname);
if (!dir)
return -1;
/* Create a buffer for the maximum filename length */
len = sizeof(entry.d_name) + strlen(dirname) + 2;
fname = malloc(len);
if (!fname) {
ret = -ENOMEM;
goto done;
}
for (node = head = NULL;; node = next) {
ret = readdir_r(dir, &entry, &result);
if (ret || !result)
break;
next = malloc(sizeof(*node) + strlen(entry.d_name) + 1);
if (!next) {
os_dirent_free(head);
ret = -ENOMEM;
goto done;
}
strcpy(next->name, entry.d_name);
switch (entry.d_type) {
case DT_REG:
next->type = OS_FILET_REG;
break;
case DT_DIR:
next->type = OS_FILET_DIR;
break;
case DT_LNK:
next->type = OS_FILET_LNK;
break;
}
next->size = 0;
snprintf(fname, len, "%s/%s", dirname, next->name);
if (!stat(fname, &buf))
next->size = buf.st_size;
if (node)
node->next = next;
if (!head)
head = node;
}
*headp = head;
done:
closedir(dir);
return ret;
}
const char *os_dirent_typename[OS_FILET_COUNT] = {
" ",
"SYM",
"DIR",
"???",
};
const char *os_dirent_get_typename(enum os_dirent_t type)
{
if (type >= 0 && type < OS_FILET_COUNT)
return os_dirent_typename[type];
return os_dirent_typename[OS_FILET_UNKNOWN];
}
ssize_t os_get_filesize(const char *fname)
{
struct stat buf;
int ret;
ret = stat(fname, &buf);
if (ret)
return ret;
return buf.st_size;
}
void os_putc(int ch)
{
putchar(ch);
}
void os_puts(const char *str)
{
while (*str)
os_putc(*str++);
}
int os_write_ram_buf(const char *fname)
{
struct sandbox_state *state = state_get_current();
int fd, ret;
fd = open(fname, O_CREAT | O_WRONLY, 0777);
if (fd < 0)
return -ENOENT;
ret = write(fd, state->ram_buf, state->ram_size);
close(fd);
if (ret != state->ram_size)
return -EIO;
return 0;
}
int os_read_ram_buf(const char *fname)
{
struct sandbox_state *state = state_get_current();
int fd, ret;
int size;
size = os_get_filesize(fname);
if (size < 0)
return -ENOENT;
if (size != state->ram_size)
return -ENOSPC;
fd = open(fname, O_RDONLY);
if (fd < 0)
return -ENOENT;
ret = read(fd, state->ram_buf, state->ram_size);
close(fd);
if (ret != state->ram_size)
return -EIO;
return 0;
}
static int make_exec(char *fname, const void *data, int size)
{
int fd;
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;
}
static int add_args(char ***argvp, const char *add_args[], int count)
{
char **argv;
int argc;
for (argv = *argvp, 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;
}
memcpy(argv, *argvp, argc * sizeof(char *));
memcpy(argv + argc, add_args, count * sizeof(char *));
argv[argc + count] = NULL;
*argvp = argv;
return 0;
}
int os_jump_to_image(const void *dest, int size)
{
struct sandbox_state *state = state_get_current();
char fname[30], mem_fname[30];
int fd, err;
const char *extra_args[5];
char **argv = state->argv;
#ifdef DEBUG
int argc, i;
#endif
err = make_exec(fname, dest, size);
if (err)
return err;
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] = fname;
extra_args[2] = "-m";
extra_args[3] = mem_fname;
extra_args[4] = "--rm_memory";
err = add_args(&argv, extra_args,
sizeof(extra_args) / sizeof(extra_args[0]));
if (err)
return err;
#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)
return err;
return unlink(fname);
}