From 205934ca45d591924b4be6e7ae5a8849958e0cf6 Mon Sep 17 00:00:00 2001 From: Fabian Imhof Date: Tue, 15 Oct 2024 08:23:39 +0000 Subject: continue implementing paging --- arch/x86_64/src/exception_handling/assert.cpp | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 arch/x86_64/src/exception_handling/assert.cpp (limited to 'arch/x86_64/src/exception_handling/assert.cpp') diff --git a/arch/x86_64/src/exception_handling/assert.cpp b/arch/x86_64/src/exception_handling/assert.cpp new file mode 100644 index 0000000..b55da49 --- /dev/null +++ b/arch/x86_64/src/exception_handling/assert.cpp @@ -0,0 +1,24 @@ +#include "arch/video/vga/text.hpp" + +namespace teachos::arch::exception_handling +{ + auto assert(bool condition, char const * message) -> void + { + if (condition) + { + return; + } + + video::vga::text::write("Assert failed: ", video::vga::text::common_attributes::green_on_black); + video::vga::text::write(message, video::vga::text::common_attributes::green_on_black); + for (;;) + { + // Trick the compiler into thinking the variable is changes at run time, + // to prevent the while loop being optimized away + // See + // https://stackoverflow.com/questions/9495856/how-to-prevent-g-from-optimizing-out-a-loop-controlled-by-a-variable-that-can + // for more information. + asm volatile("" : "+g"(condition)); + } + } +} // namespace teachos::arch::exception_handling \ No newline at end of file -- cgit v1.2.3