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joe biden

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This commit is contained in:
Freya Murphy 2024-01-27 03:33:01 -05:00
parent 79bd0a643e
commit 59050bbca0
Signed by: freya
GPG key ID: 744AB800E383AE52
2 changed files with 12 additions and 17 deletions
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3
Makefile
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@ -45,3 +45,6 @@ $(BUILD_DIR)/$(ISO_NAME): $(BUILD_DIR)/$(K_BIN_NAME) grub.cfg
cp grub.cfg $(BUILD_DIR)/iso/boot/grub
cp $(BUILD_DIR)/$(K_BIN_NAME) $(BUILD_DIR)/iso/boot
grub-mkrescue -o $(BUILD_DIR)/$(ISO_NAME) $(BUILD_DIR)/iso
run:
qemu-system-x86_64 $(BUILD_DIR)/$(ISO_NAME) -serial stdio

26
src/arch/amd64/shim.c
View file

@ -1,23 +1,15 @@
#include <stdint.h>
#include <cpuid.h>
#define PG_PRESENT 0x0000'0000'0000'0001
#define PG_READ_WRITE 0x0000'0000'0000'0002
#define PG_USER_SUPERVISE 0x0000'0000'0000'0004
#define PG_WRITE_THROUGH 0x0000'0000'0000'0008
#define PG_CACHE_DISABLE 0x0000'0000'0000'0010
#define PG_ACCESSED 0x0000'0000'0000'0020
#define PG_EXECUTE_DISABLE 0x8000'0000'0000'0000
#define F_PRESENT 0b1
#define F_WRITEABLE 0b10
#define F_UNPRIVILEGED 0b100
#define F_WRITETHROUGH 0b1000
#define F_CACHEDISABLE 0b10000
#define F_ACCESSED 0b100000
#define F_DIRTY 0b1000000
#define F_MEGABYTE 0b10000000
#define F_GLOBAL 0b100000000
#define F_PRESENT 0x001
#define F_WRITEABLE 0x002
#define F_UNPRIVILEGED 0x004
#define F_WRITETHROUGH 0x008
#define F_CACHEDISABLE 0x010
#define F_ACCESSED 0x020
#define F_DIRTY 0x040
#define F_MEGABYTE 0x080
#define F_GLOBAL 0x100
// PAGE MAP LEVEL 4 ENTRY
struct pml4e {