diff options
Diffstat (limited to 'arch/x86_64')
93 files changed, 3965 insertions, 311 deletions
diff --git a/arch/x86_64/CMakeLists.txt b/arch/x86_64/CMakeLists.txt index e9f8d5f..57b3a60 100644 --- a/arch/x86_64/CMakeLists.txt +++ b/arch/x86_64/CMakeLists.txt @@ -7,6 +7,15 @@ mark_as_advanced(TEACHOS_KERNEL_LINKER_SCRIPT) target_sources("_kernel" PRIVATE "src/kernel/main.cpp" + "src/kernel/cpu/control_register.cpp" + "src/kernel/cpu/gdtr.cpp" + "src/kernel/cpu/idtr.cpp" + "src/kernel/cpu/if.cpp" + "src/kernel/cpu/call.cpp" + "src/kernel/cpu/msr.cpp" + "src/kernel/cpu/segment_register.cpp" + "src/kernel/cpu/tlb.cpp" + "src/kernel/cpu/tr.cpp" ) target_link_options("_kernel" PRIVATE @@ -53,21 +62,19 @@ target_sources("_memory" PRIVATE "src/memory/paging/virtual_page.cpp" "src/memory/paging/active_page_table.cpp" "src/memory/paging/inactive_page_table.cpp" - "src/memory/cpu/tlb.cpp" - "src/memory/cpu/control_register.cpp" - "src/memory/cpu/msr.cpp" "src/memory/heap/bump_allocator.cpp" + "src/memory/heap/user_heap_allocator.cpp" "src/memory/heap/memory_block.cpp" "src/memory/heap/linked_list_allocator.cpp" "src/memory/heap/global_heap_allocator.cpp" ) #[============================================================================[ -# The Shared Library +# The STL Library #]============================================================================] -target_sources("_shared" PRIVATE - "src/shared/mutex.cpp" +target_sources("_stl" PRIVATE + "src/stl/mutex.cpp" ) #[============================================================================[ @@ -82,6 +89,45 @@ target_sources("_exception" PRIVATE ) #[============================================================================[ +# The Context switching Library +#]============================================================================] + +target_sources("_context" PRIVATE + "src/context_switching/segment_descriptor_table/access_byte.cpp" + "src/context_switching/segment_descriptor_table/gdt_flags.cpp" + "src/context_switching/segment_descriptor_table/global_descriptor_table_pointer.cpp" + "src/context_switching/segment_descriptor_table/global_descriptor_table.cpp" + "src/context_switching/segment_descriptor_table/segment_descriptor_base.cpp" + "src/context_switching/segment_descriptor_table/segment_descriptor_extension.cpp" + "src/context_switching/main.cpp" + "src/context_switching/syscall/main.cpp" + "src/context_switching/syscall/syscall_enable.cpp" + "src/context_switching/syscall/syscall_handler.cpp" + "src/context_switching/interrupt_descriptor_table/gate_descriptor.cpp" + "src/context_switching/interrupt_descriptor_table/idt_flags.cpp" + "src/context_switching/interrupt_descriptor_table/interrupt_descriptor_table_pointer.cpp" + "src/context_switching/interrupt_descriptor_table/interrupt_descriptor_table.cpp" + "src/context_switching/interrupt_descriptor_table/ist_offset.cpp" + "src/context_switching/interrupt_descriptor_table/segment_selector.cpp" +) + +#[============================================================================[ +# The Interrupt Handlers +#]============================================================================] + +target_sources("_interrupt_handling" PRIVATE + "src/interrupt_handling/generic_interrupt_handler.cpp" +) + +#[============================================================================[ +# The User code +#]============================================================================] + +target_sources("_context" PRIVATE + "src/user/main.cpp" +) + +#[============================================================================[ # The Bootable ISO Image #]============================================================================] diff --git a/arch/x86_64/include/arch/context_switching/interrupt_descriptor_table/gate_descriptor.hpp b/arch/x86_64/include/arch/context_switching/interrupt_descriptor_table/gate_descriptor.hpp new file mode 100644 index 0000000..07110c8 --- /dev/null +++ b/arch/x86_64/include/arch/context_switching/interrupt_descriptor_table/gate_descriptor.hpp @@ -0,0 +1,69 @@ +#ifndef TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_INTERRUPT_DESCRIPTOR_TABLE_GATE_DESCRIPTOR_HPP +#define TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_INTERRUPT_DESCRIPTOR_TABLE_GATE_DESCRIPTOR_HPP + +#include "arch/context_switching/interrupt_descriptor_table/idt_flags.hpp" +#include "arch/context_switching/interrupt_descriptor_table/ist_offset.hpp" +#include "arch/context_switching/interrupt_descriptor_table/segment_selector.hpp" + +#include <bitset> +#include <cstdint> + +namespace teachos::arch::context_switching::interrupt_descriptor_table +{ + __extension__ typedef __int128 int128_t; + __extension__ typedef unsigned __int128 uint128_t; + + /** + * @brief Defines helper function for all states and the actual data the gate descriptor can have. + */ + struct [[gnu::packed]] gate_descriptor + { + /** + * @brief Default Constructor. + */ + gate_descriptor() = default; + + /** + * @brief Constructor. + * + * @note Created gate descriptor copies the given bytes into these components ending with a 32 bit reserved + * field that has to be used, because the 64-bit gate descriptor needs to be big enough for two 32-bit gate + * descriptor. + * - 16 bit Segment Selector + * - 3 bit Interrupt Stack Table Offset + * - 8 bit Type and Flags + * - 64 bit Offset + * + * @param flags Copies the bits set from the given data into the individual components of a gate + * descriptor. + */ + explicit gate_descriptor(uint128_t flags); + + /** + * @brief Constructor. + * + * @param selector, ist, flags, offset Copies the bits set from the given data into the individual components of + * a gate descriptor. + */ + gate_descriptor(segment_selector selector, ist_offset ist, idt_flags flags, uint64_t offset); + + /** + * @brief Allows to compare the underlying bits of two instances. + * + * @param other Other instance that we want to compare with. + * @return Whether the underlying set bits of both types are the same. + */ + auto operator==(gate_descriptor const & other) const -> bool = default; + + private: + // The order in private variables starts for the first variable being the rightmost bit. + uint16_t _offset_1 = {}; ///< Lower 16 bits of handler function address (0 - 15) + segment_selector _selector = {}; ///< Segment selector (16 - 31) + ist_offset _ist = {}; ///< Interrupt Stack Table offset (32 - 39) + idt_flags _flags = {}; ///< Gate Type and Flags (40 - 47) + uint64_t _offset_2 : 48 = {}; ///< Upper 48 bits of handler function address (48 - 95) + uint32_t : 32; ///< Reserved field used to ensure this struct is 128 bits big (96 - 127) + }; +} // namespace teachos::arch::context_switching::interrupt_descriptor_table + +#endif // TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_INTERRUPT_DESCRIPTOR_TABLE_GATE_DESCRIPTOR_HPP diff --git a/arch/x86_64/include/arch/context_switching/interrupt_descriptor_table/idt_flags.hpp b/arch/x86_64/include/arch/context_switching/interrupt_descriptor_table/idt_flags.hpp new file mode 100644 index 0000000..5104c36 --- /dev/null +++ b/arch/x86_64/include/arch/context_switching/interrupt_descriptor_table/idt_flags.hpp @@ -0,0 +1,81 @@ + +#ifndef TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_INTERRUPT_DESCRIPTOR_TABLE_IDT_FLAGS_HPP +#define TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_INTERRUPT_DESCRIPTOR_TABLE_IDT_FLAGS_HPP + +#include <bitset> +#include <cstdint> + +namespace teachos::arch::context_switching::interrupt_descriptor_table +{ + /** + * @brief Defines helper function for all states that the access byte field of a segment descriptor can + * have. + */ + struct [[gnu::packed]] idt_flags + { + /** + * @brief Possible set bits in our underlying bits and the meaning when they are set. + */ + enum bitset : uint8_t + { + INTERRUPT_GATE = 0b01110, ///< The actual type of gate segment is a interrupt gate. + TRAP_GATE = 0b01111, ///< The actual type of gate segment is a trap gate. + DESCRIPTOR_LEVEL_KERNEL = + 0U << 5U, ///< Highest privileged level used by the kernel to allow for full access of resources. + DESCRIPTOR_LEVEL_ADMIN = + 1U << 5U, ///< Restricts access to own application and thoose of lower privilege. Should only be used if more + ///< than two privilege levels are required, otherwise using Level 3 and Level 0 is recommended. + DESCRIPTOR_LEVEL_PRIVILEGED_USER = + 2U << 5U, ///< Restricts access to own application and thoose of lower privilege. Should only be used if more + ///< than two privilege levels are required, otherwise using Level 3 and Level 0 is recommended. + DESCRIPTOR_LEVEL_USER = 3U << 5U, ///< Restricts |