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Load our own GDT.

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Replace the GDT from limine with our own.
This commit is contained in:
Drew Galbraith 2023-05-17 21:41:08 -07:00
parent 872e6f3392
commit 03fe4d8c2e
6 changed files with 119 additions and 10 deletions
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14
zion/CMakeLists.txt
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@ -1,4 +1,6 @@
add_executable(zion
common/gdt.cpp
common/load_gdt.s
debug/debug.cpp
zion.cpp)
@ -7,20 +9,14 @@ target_include_directories(zion
${CMAKE_CURRENT_SOURCE_DIR}
)
# -c -- Don't run the linker.
# -c -- Don't run the linker (only necessary for the assembler)
# -ffreestanding
# -nostdlib -- Don't include the standard library.
# -mabi=sysv -- Explicitly specify the ABI since we will rely on it.
# -mno-red-zone -- Don't put data below the stack pointer (clobbered by interrupts).
# -mcmodel=kernel -- Assume the kernel code is running in the higher half.
# -mgeneral-regs-only -- Prevent GCC from using a whole host of nonsense registers (that we have to enable).
# Hopefully preceded by -mgeneral-regs-only
# -mno-80387
# -mno-mmx
# -mno-3dnow
# -mno-sse -mno-sse2
# -MMD -- Something with the preprocessor?
set(_Z_COMPILE_FLAGS "${CMAKE_CXX_FLAGS} -ffreestanding -nostdlib -mabi=sysv -mno-red-zone -mcmodel=kernel -mgeneral-regs-only")
# -mno-80387 -mno-mmx -mno-3dnow -mno-sse -mno-sse2 -MMD
set(_Z_COMPILE_FLAGS "${CMAKE_CXX_FLAGS} -c -ffreestanding -nostdlib -mabi=sysv -mno-red-zone -mcmodel=kernel -mgeneral-regs-only")
set(_Z_LINK_SCRIPT "${CMAKE_CURRENT_SOURCE_DIR}/linker.ld")