For debugging it is sometimes useful to write out data for inspection using an external tool. Add a function which can write this data to a given file.
Signed-off-by: Simon Glass sjg@chromium.org ---
arch/sandbox/cpu/os.c | 20 ++++++++++++++++++++ include/os.h | 13 +++++++++++++ 2 files changed, 33 insertions(+)
diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c index 2d20cfe1fa6..3a46038c5fc 100644 --- a/arch/sandbox/cpu/os.c +++ b/arch/sandbox/cpu/os.c @@ -106,6 +106,26 @@ void os_exit(int exit_code) exit(exit_code); }
+int os_write_file(const char *name, const void *buf, int size) +{ + char fname[256]; + int fd; + + fd = os_open(fname, OS_O_WRONLY | OS_O_CREAT | OS_O_TRUNC); + if (fd < 0) { + printf("Cannot open file '%s'\n", fname); + return -EIO; + } + if (os_write(fd, buf, size) != size) { + printf("Cannot write to file '%s'\n", fname); + return -EIO; + } + os_close(fd); + printf("Write '%s', size %#x (%d)\n", name, size, size); + + return 0; +} + /* Restore tty state when we exit */ static struct termios orig_term; static bool term_setup; diff --git a/include/os.h b/include/os.h index 9e3a561b65e..efa9e52d124 100644 --- a/include/os.h +++ b/include/os.h @@ -347,4 +347,17 @@ void os_abort(void); */ int os_mprotect_allow(void *start, size_t len);
+/** + * os_write_file() - Write a file to the host filesystem + * + * This can be useful when debugging for writing data out of sandbox for + * inspection by external tools. + * + * @name: File path to write to + * @buf: Data to write + * @size: Size of data to write + * @return 0 if OK, -ve on error + */ +int os_write_file(const char *name, const void *buf, int size); + #endif