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gdt: Allocate GDT on the heap on UEFI

This commit is contained in:
mintsuki 2021-11-25 21:51:41 +01:00
parent 6c7fa6924a
commit eea96cda9c
3 changed files with 15 additions and 0 deletions
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3
stage23/entry.s3.c
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@ -8,6 +8,7 @@
#include <sys/e820.h>
#include <sys/a20.h>
#include <sys/idt.h>
#include <sys/gdt.h>
#include <lib/print.h>
#include <fs/file.h>
#include <lib/elf.h>
@ -67,6 +68,8 @@ void uefi_entry(EFI_HANDLE ImageHandle, EFI_SYSTEM_TABLE *SystemTable) {
init_memmap();
init_gdt();
disk_create_index();
boot_volume = NULL;

2
stage23/sys/gdt.h
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@ -24,4 +24,6 @@ struct gdt_desc {
extern struct gdtr gdt;
void init_gdt(void);
#endif

10
stage23/sys/gdt.s2.c
View File

@ -1,5 +1,7 @@
#include <stdint.h>
#include <sys/gdt.h>
#include <mm/pmm.h>
#include <lib/libc.h>
static struct gdt_desc gdt_descs[] = {
{0},
@ -69,3 +71,11 @@ struct gdtr gdt = {
0
#endif
};
#if uefi == 1
void init_gdt(void) {
struct gdt_desc *gdt_copy = ext_mem_alloc(sizeof(gdt_descs));
memcpy(gdt_copy, gdt_descs, sizeof(gdt_descs));
gdt.ptr = (uintptr_t)gdt_copy;
}
#endif