summaryrefslogtreecommitdiff
path: root/arch/sandbox/cpu/os.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/sandbox/cpu/os.c')
-rw-r--r--arch/sandbox/cpu/os.c164
1 files changed, 122 insertions, 42 deletions
diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index 325ded51d8a..62e05c554a1 100644
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -98,9 +98,8 @@ void os_exit(int exit_code)
exit(exit_code);
}
-int os_write_file(const char *name, const void *buf, int size)
+int os_write_file(const char *fname, const void *buf, int size)
{
- char fname[256];
int fd;
fd = os_open(fname, OS_O_WRONLY | OS_O_CREAT | OS_O_TRUNC);
@@ -110,14 +109,53 @@ int os_write_file(const char *name, const void *buf, int size)
}
if (os_write(fd, buf, size) != size) {
printf("Cannot write to file '%s'\n", fname);
+ os_close(fd);
return -EIO;
}
os_close(fd);
- printf("Write '%s', size %#x (%d)\n", name, size, size);
return 0;
}
+int os_read_file(const char *fname, void **bufp, int *sizep)
+{
+ off_t size;
+ int ret = -EIO;
+ int fd;
+
+ fd = os_open(fname, OS_O_RDONLY);
+ if (fd < 0) {
+ printf("Cannot open file '%s'\n", fname);
+ goto err;
+ }
+ size = os_lseek(fd, 0, OS_SEEK_END);
+ if (size < 0) {
+ printf("Cannot seek to end of file '%s'\n", fname);
+ goto err;
+ }
+ if (os_lseek(fd, 0, OS_SEEK_SET) < 0) {
+ printf("Cannot seek to start of file '%s'\n", fname);
+ goto err;
+ }
+ *bufp = os_malloc(size);
+ if (!*bufp) {
+ printf("Not enough memory to read file '%s'\n", fname);
+ ret = -ENOMEM;
+ goto err;
+ }
+ if (os_read(fd, *bufp, size) != size) {
+ printf("Cannot read from file '%s'\n", fname);
+ goto err;
+ }
+ os_close(fd);
+ *sizep = size;
+
+ return 0;
+err:
+ os_close(fd);
+ return ret;
+}
+
/* Restore tty state when we exit */
static struct termios orig_term;
static bool term_setup;
@@ -343,7 +381,7 @@ void os_dirent_free(struct os_dirent_node *node)
while (node) {
next = node->next;
- free(node);
+ os_free(node);
node = next;
}
}
@@ -368,7 +406,7 @@ int os_dirent_ls(const char *dirname, struct os_dirent_node **headp)
/* Create a buffer upfront, with typically sufficient size */
dirlen = strlen(dirname) + 2;
len = dirlen + 256;
- fname = malloc(len);
+ fname = os_malloc(len);
if (!fname) {
ret = -ENOMEM;
goto done;
@@ -381,7 +419,7 @@ int os_dirent_ls(const char *dirname, struct os_dirent_node **headp)
ret = errno;
break;
}
- next = malloc(sizeof(*node) + strlen(entry->d_name) + 1);
+ next = os_malloc(sizeof(*node) + strlen(entry->d_name) + 1);
if (!next) {
os_dirent_free(head);
ret = -ENOMEM;
@@ -390,10 +428,10 @@ int os_dirent_ls(const char *dirname, struct os_dirent_node **headp)
if (dirlen + strlen(entry->d_name) > len) {
len = dirlen + strlen(entry->d_name);
old_fname = fname;
- fname = realloc(fname, len);
+ fname = os_realloc(fname, len);
if (!fname) {
- free(old_fname);
- free(next);
+ os_free(old_fname);
+ os_free(next);
os_dirent_free(head);
ret = -ENOMEM;
goto done;
@@ -427,7 +465,7 @@ int os_dirent_ls(const char *dirname, struct os_dirent_node **headp)
done:
closedir(dir);
- free(fname);
+ os_free(fname);
return ret;
}
@@ -525,20 +563,48 @@ static int make_exec(char *fname, const void *data, int size)
return 0;
}
-static int add_args(char ***argvp, const char *add_args[], int count)
+/**
+ * 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;
+ char **argv, **ap;
int argc;
- for (argv = *argvp, argc = 0; (*argvp)[argc]; argc++)
+ for (argc = 0; (*argvp)[argc]; argc++)
;
- argv = malloc((argc + count + 1) * sizeof(char *));
+ argv = os_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 *));
+ 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;
@@ -546,21 +612,27 @@ static int add_args(char ***argvp, const char *add_args[], int count)
return 0;
}
-int os_jump_to_image(const void *dest, int size)
+/**
+ * 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 fname[30], mem_fname[30];
+ char mem_fname[30];
int fd, err;
- const char *extra_args[5];
+ char *extra_args[5];
char **argv = state->argv;
+ int argc;
#ifdef DEBUG
- int argc, i;
+ int 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)
@@ -573,14 +645,16 @@ int os_jump_to_image(const void *dest, int size)
os_fd_restore();
extra_args[0] = "-j";
- extra_args[1] = fname;
+ extra_args[1] = (char *)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]));
+ 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++)
@@ -591,13 +665,28 @@ int os_jump_to_image(const void *dest, int size)
os_exit(2);
err = execv(fname, argv);
- free(argv);
- if (err)
+ os_free(argv);
+ if (err) {
+ perror("Unable to run image");
+ printf("Image filename '%s'\n", mem_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();
@@ -646,9 +735,10 @@ int os_find_u_boot(char *fname, int maxlen)
}
/* Look for 'u-boot' in the parent directory of spl/ */
- p = strstr(fname, "/spl/");
+ p = strstr(fname, "spl/");
if (p) {
- strcpy(p, p + 4);
+ /* Remove the "spl" characters */
+ memmove(p, p + 4, strlen(p + 4) + 1);
fd = os_open(fname, O_RDONLY);
if (fd >= 0) {
close(fd);
@@ -661,17 +751,7 @@ int os_find_u_boot(char *fname, int maxlen)
int os_spl_to_uboot(const char *fname)
{
- struct sandbox_state *state = state_get_current();
- char *argv[state->argc + 1];
- int ret;
-
- memcpy(argv, state->argv, sizeof(char *) * (state->argc + 1));
- argv[0] = (char *)fname;
- ret = execv(fname, argv);
- if (ret)
- return ret;
-
- return unlink(fname);
+ return os_jump_to_file(fname);
}
void os_localtime(struct rtc_time *rt)
generated by cgit v1.2.3 (git 2.0.4) at 2025-07-16 11:33:30 +0000