Add %pm as format string to print a MAC address. This is helpful when analyzing network problems.
Signed-off-by: Heinrich Schuchardt xypron.glpk@gmx.de --- lib/efi_selftest/efi_selftest_console.c | 41 ++++++++++++++++++++++++++++++++- 1 file changed, 40 insertions(+), 1 deletion(-)
diff --git a/lib/efi_selftest/efi_selftest_console.c b/lib/efi_selftest/efi_selftest_console.c index 7b5b724a61..840e2290c6 100644 --- a/lib/efi_selftest/efi_selftest_console.c +++ b/lib/efi_selftest/efi_selftest_console.c @@ -12,6 +12,37 @@ struct efi_simple_text_output_protocol *con_out; struct efi_simple_input_interface *con_in;
+/* + * Print a MAC address to an u16 string + * + * @pointer: mac address + * @buf: pointer to buffer address + * on return position of terminating zero word + */ +static void mac(void *pointer, u16 **buf) +{ + int i, j; + u16 c; + u8 *p = (u8 *)pointer; + u8 byte; + u16 *pos = *buf; + + for (i = 0; i < ARP_HLEN; ++i) { + if (i) + *pos++ = ':'; + byte = p[i]; + for (j = 4; j >= 0; j -= 4) { + c = (byte >> j) & 0x0f; + c += '0'; + if (c > '9') + c += 'a' - '9' - 1; + *pos++ = c; + } + } + *pos = 0; + *buf = pos; +} + /* * Print a pointer to an u16 string * @@ -146,7 +177,15 @@ void efi_st_printf(const char *fmt, ...) int2dec(va_arg(args, s32), &pos); break; case 'p': - pointer(va_arg(args, void*), &pos); + ++c; + switch (*c) { + case 'm': + mac(va_arg(args, void*), &pos); + break; + default: + --c; + pointer(va_arg(args, void*), &pos); + } break; case 's': s = va_arg(args, const char *);