On Tue, Jul 7, 2015 at 1:20 PM, Yinghai Lu <[email protected]> wrote:
> Move out serial_putchar() calling out of putchar
> Let puts() to call serial_putchar() directly.
>
> So only need to check early_serial_base per string.
>
> Signed-off-by: Yinghai Lu <[email protected]>
If you're going to do this, I think putchar should be static, and all
callers should be switched to puts. There are callers that expect
putchar to send to both bios and serial.
-Kees
> ---
> arch/x86/boot/tty.c | 14 ++++++++++----
> 1 file changed, 10 insertions(+), 4 deletions(-)
>
> diff --git a/arch/x86/boot/tty.c b/arch/x86/boot/tty.c
> index def2451..114caea 100644
> --- a/arch/x86/boot/tty.c
> +++ b/arch/x86/boot/tty.c
> @@ -52,16 +52,22 @@ static void __attribute__((section(".inittext")))
> bios_putchar(int ch)
> void __attribute__((section(".inittext"))) putchar(int ch)
> {
> if (ch == '\n')
> - putchar('\r'); /* \n -> \r\n */
> + bios_putchar('\r'); /* \n -> \r\n */
>
> bios_putchar(ch);
> -
> - if (early_serial_base != 0)
> - serial_putchar(ch);
> }
>
> void __attribute__((section(".inittext"))) puts(const char *str)
> {
> + if (early_serial_base) {
> + const char *s = str;
> + while (*s) {
> + if (*s == '\n')
> + serial_putchar('\r');
> + serial_putchar(*s++);
> + }
> + }
> +
> while (*str)
> putchar(*str++);
> }
> --
> 1.8.4.5
>
--
Kees Cook
Chrome OS Security
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