diff options
author | Simon Glass <sjg@chromium.org> | 2018-10-01 11:55:08 -0600 |
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committer | Simon Glass <sjg@chromium.org> | 2018-10-09 04:40:26 -0600 |
commit | 056a5cea3139cd41836051114a0f3344ac3d9f58 (patch) | |
tree | e470ad79ba80909ee6c0ea40f104795914bb2d5d | |
parent | 50b288aca324649fb5b357ce75972a5261cf94fc (diff) | |
download | u-boot-056a5cea3139cd41836051114a0f3344ac3d9f58.zip u-boot-056a5cea3139cd41836051114a0f3344ac3d9f58.tar.gz u-boot-056a5cea3139cd41836051114a0f3344ac3d9f58.tar.bz2 |
sandbox: Add a way to write data to the host filesystem
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>
-rw-r--r-- | arch/sandbox/cpu/os.c | 20 | ||||
-rw-r--r-- | include/os.h | 13 |
2 files changed, 33 insertions, 0 deletions
diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c index 1d87a53..e7d6691 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 9e3a561..efa9e52 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 |