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user thread/process and elf loader stub

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Matheus
2022-08-13 23:16:34 -03:00
parent e7f4245c6d
commit 33a516a611
14 changed files with 399 additions and 7 deletions
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src/arch/x86_64/mmu.c
+19 -5
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@@ -26,8 +26,8 @@ static void changeentry(uint64_t* entry, void* paddr, uint64_t flags){
#define PTR_FLAGS ARCH_MMU_MAP_READ | ARCH_MMU_MAP_WRITE | ARCH_MMU_MAP_USER | ARCH_MMU_MAP_NOEXEC
static void switchcontext(arch_mmu_tableptr context){
asm("mov %%rax, %%cr3" : : "a"(context));
void arch_mmu_switchcontext(arch_mmu_tableptr context){
asm("mov %%rax, %%cr3" : : "a"(context) : "memory");
}
void* inv = NULL;
@@ -162,7 +162,21 @@ void arch_mmu_unmap(arch_mmu_tableptr context, void* vaddr){
}
static arch_mmu_tableptr context; //boostrap context
static arch_mmu_tableptr context; //boostrap context; also holds the kernel page tables
arch_mmu_tableptr arch_mmu_newcontext(){
arch_mmu_tableptr newcontext = pmm_alloc(1);
if(!newcontext)
return NULL;
memcpy((void*)newcontext + (size_t)limine_hhdm_offset, context, PAGE_SIZE);
memset((void*)newcontext + (size_t)limine_hhdm_offset, 0, PAGE_SIZE / 2);
return newcontext;
}
void arch_mmu_init(){
@@ -252,7 +266,7 @@ void arch_mmu_init(){
}
switchcontext(context);
arch_mmu_switchcontext(context);
arch_getcls()->context->context = context;
printf("In bootstrap context\n");
@@ -261,7 +275,7 @@ void arch_mmu_init(){
void arch_mmu_apinit(){
switchcontext(context);
arch_mmu_switchcontext(context);
arch_getcls()->context = pmm_hhdmalloc(1);