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Hello user process

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This commit is contained in:
Kamil Kowalczyk
2025-09-01 23:22:47 +02:00
parent 13ab117b1b
commit 2015e0e0aa
28 changed files with 744 additions and 65 deletions
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19
kernel/hal/x86_64/vmm.c
View File

@ -5,6 +5,8 @@
#include "bootinfo/bootinfo.h"
#include "pmm/pmm.h"
#include "paging.h"
#include "proc/proc.h"
#include "kprintf.h"
PgTable *KERNEL_CR3 = NULL;
@ -73,7 +75,7 @@ void hal_vmm_map_range(PgTable *cr3, void *virtstart, void *physstart, size_t si
}
}
void hal_vmm_unmap_range(PgTable *cr3, void *virtstart, void *physstart, size_t size, uint32_t flags) {
void hal_vmm_unmap_range(PgTable *cr3, void *virtstart, void *physstart, size_t size) {
if (size % HAL_PAGE_SIZE != 0 || (uint64_t)virtstart % HAL_PAGE_SIZE != 0 || (uint64_t)physstart % HAL_PG_PRESENT != 0) {
return;
}
@ -96,6 +98,21 @@ void hal_vmm_switch_pd(PgTable *cr3) {
hal_loadpd(cr3);
}
PgTable *hal_vmm_userproc_pml4(Proc *proc) {
uint8_t *cr3 = pmm_alloc(1);
PgTable *pml4 = (PgTable *)VIRT(cr3);
hal_memset(pml4, 0, HAL_PAGE_SIZE);
PgTable *kcr3 = VIRT(KERNEL_CR3);
for (size_t i = 256; i < 512; i++) {
pml4->ents[i] = kcr3->ents[i];
}
return (PgTable *)cr3;
}
void hal_vmm_init(void) {
KERNEL_CR3 = hal_vmm_current_cr3();
kprintf("KERNEL_CR3 = %p\n", KERNEL_CR3);
}

5
kernel/hal/x86_64/vmm.h
View File

@ -5,6 +5,8 @@
#include <stdbool.h>
#include "compiler/attr.h"
struct Proc;
enum {
HAL_PG_PRESENT = 1<<0,
HAL_PG_RW = 1<<1,
@ -43,6 +45,7 @@ void hal_vmm_unmap_page(PgTable *pml4, uint64_t virtaddr, uint64_t physaddr);
void hal_vmm_map_page(PgTable *pml4, uint64_t virtaddr, uint64_t physaddr, uint32_t flags);
PgTable *hal_vmm_current_cr3(void);
void hal_vmm_map_range(PgTable *cr3, void *virtstart, void *physstart, size_t size, uint32_t flags);
void hal_vmm_unmap_range(PgTable *cr3, void *virtstart, void *physstart, size_t size, uint32_t flags);
void hal_vmm_unmap_range(PgTable *cr3, void *virtstart, void *physstart, size_t size);
PgTable *hal_vmm_userproc_pml4(struct Proc *proc);
#endif // HAL_VMM_H_