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Proper permissions for kernel-space code and data!

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This commit is contained in:
pjht 2019-05-22 14:16:35 -05:00
parent 3448e834e8
commit 9f79bf1aae
2 changed files with 6 additions and 6 deletions
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12
cpu/i386/paging.c
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@ -126,9 +126,9 @@ void* paging_new_address_space() {
invl_page(smap);
for (uint32_t i=0;i<NUM_KERN_DIRS;i++) {
uint32_t entry_virt=(uint32_t)&(kern_page_tables[i*1024]);
smap[i+768]=(entry_virt-0xC0000000)|0x7;
smap[i+768]=(entry_virt-0xC0000000)|0x3;
}
smap[1021]=(((uint32_t)kmalloc_page_tables)-0xC0000000)|0x7;
smap[1021]=(((uint32_t)kmalloc_page_tables)-0xC0000000)|0x3;
for (uint32_t i=0;i<2;i++) {
uint32_t entry_virt=(uint32_t)&(smap_page_tables[i*1024]);
smap[i+1022]=(entry_virt-0xC0000000)|0x3;
@ -148,10 +148,10 @@ void load_address_space(uint32_t cr3) {
void paging_init() {
for (uint32_t i=0;i<NUM_KERN_DIRS*1024;i++) {
kern_page_tables[i]=(i<<12)|0x7;
kern_page_tables[i]=(i<<12)|0x3;
}
for (uint32_t i=0;i<1024;i++) {
kmalloc_page_tables[i]=(uint32_t)pmem_alloc(1)|0x7;
kmalloc_page_tables[i]=(uint32_t)pmem_alloc(1)|0x3;
}
smap_page_tables[0]=(((uint32_t)&(page_directory))-0xC0000000)|0x3;
for (uint32_t i=1;i<2048;i++) {
@ -159,9 +159,9 @@ void paging_init() {
}
for (uint32_t i=0;i<NUM_KERN_DIRS;i++) {
uint32_t entry_virt=(uint32_t)&(kern_page_tables[i*1024]);
page_directory[i+768]=(entry_virt-0xC0000000)|0x7;
page_directory[i+768]=(entry_virt-0xC0000000)|0x3;
}
page_directory[1021]=(((uint32_t)kmalloc_page_tables)-0xC0000000)|0x7;
page_directory[1021]=(((uint32_t)kmalloc_page_tables)-0xC0000000)|0x3;
for (uint32_t i=0;i<2;i++) {
uint32_t entry_virt=(uint32_t)&(smap_page_tables[i*1024]);
page_directory[i+1022]=(entry_virt-0xC0000000)|0x3;

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initrd/init
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