From d8aca3ff2501f9a77e22e5afb7a30380aed205af Mon Sep 17 00:00:00 2001 From: Jon Santmyer Date: Fri, 16 Oct 2026 16:42:22 -0400 Subject: remove explicit framebuffer in kernel. reduce locking in syscalls --- arch/x86_64/debug/debug.c | 10 ++++++++++ arch/x86_64/debug/printf.c | 20 ++++++++++++++++++++ 2 files changed, 30 insertions(+) create mode 100644 arch/x86_64/debug/debug.c create mode 100644 arch/x86_64/debug/printf.c (limited to 'arch/x86_64/debug') diff --git a/arch/x86_64/debug/debug.c b/arch/x86_64/debug/debug.c new file mode 100644 index 0000000..5b2c918 --- /dev/null +++ b/arch/x86_64/debug/debug.c @@ -0,0 +1,10 @@ +#include "debug/debug.h" +#include "arch/x86_64/hal/serial_com.h" + +void _debug_init_arch(void) +{ + #ifdef DEBUG_SERIAL + _debug_has_output = true; + serial_com_init(); + #endif +} diff --git a/arch/x86_64/debug/printf.c b/arch/x86_64/debug/printf.c new file mode 100644 index 0000000..13737b9 --- /dev/null +++ b/arch/x86_64/debug/printf.c @@ -0,0 +1,20 @@ +#include "lib/printf.h" +#include "../hal/serial_com.h" +#include "api/error.h" +#include "debug/debug.h" + +int +kvprintf(const char *fmt, va_list ap) +{ + if(!_debug_has_output) return -EBADCALL; + + char buffer[256] = { 0 }; + int r = vsnprintf(buffer, 256, fmt, ap); + int wlen = (r > 256 ? 256 : r); + +#ifdef DEBUG_SERIAL + serial_com_write(SERIAL_COM1, buffer, wlen); +#endif + + return r; +} -- cgit v1.2.3