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Alloc extra pages for raw binary

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This commit is contained in:
xamidev
2026-05-10 19:36:01 +02:00
parent 01911bdd32
commit 1142699c48
2 changed files with 7 additions and 1 deletions
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src/mem/vmm.c
+5 -1
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@@ -18,6 +18,7 @@ compared to the PMM which allocs/frees 4kb frames ("physical pages").
#include <mem/paging.h>
#include <stddef.h>
#include <mem/pmm.h>
#include <mem/utils.h>
#include <kernel.h>
extern uint64_t *kernel_pml4;
@@ -116,6 +117,8 @@ void* vmm_map(uint64_t* pml4, uint64_t virt, uint64_t flags)
panic(NULL, "VMM/PMM out of memory!");
}
memset(PHYS_TO_VIRT(phys), 0, PAGE_SIZE);
paging_map_page(pml4, virt, phys, flags | PTE_PRESENT);
return (void*)virt;
}
@@ -255,8 +258,9 @@ uintptr_t vmm_alloc_user_code(uint64_t* pml4, void* code_addr, uint64_t code_siz
// Round code_size up to next page boundary
uint64_t code_size_aligned = (code_size + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1);
uint64_t mapped_size = code_size_aligned + ((uint64_t)USER_RAW_EXTRA_PAGES * PAGE_SIZE);
for (uint64_t i=code_start; i<code_start+code_size_aligned; i+=PAGE_SIZE) {
for (uint64_t i=code_start; i<code_start+mapped_size; i+=PAGE_SIZE) {
vmm_map(pml4, i, PTE_PRESENT | PTE_WRITABLE | PTE_USER);
}