ps5-linux/ps5-linux-loader
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remove data_cave offset and use page alloc for sc args

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This commit is contained in:
Mateico
2026-05-15 15:04:08 +02:00
parent e84dcbf281
commit 85a16afa80
9 changed files with 92 additions and 94 deletions
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58
source/utils.c
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@@ -4,6 +4,7 @@
#include <ps5/kernel.h>
#include <stdio.h>
#include <sys/cpuset.h>
#include <sys/mman.h>
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/stat.h>
@@ -284,3 +285,60 @@ enum kit_type get_kit_type(void) {
notify("Retail console detected\n");
return KIT_RETAIL;
}
uint64_t alloc_page(void) {
void *page = mmap(NULL, PAGE_SIZE, PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_ANONYMOUS, -1, 0);
// Fault it to force physical allocation
*(uint8_t *)page = 0;
return vtophys_user((uintptr_t)page);
}
void install_page(uintptr_t pml4, vm_offset_t va, vm_paddr_t pa, int bits) {
uint64_t entry;
uintptr_t pml4e = pml4 + pmap_pml4e_index(va) * 8;
entry = kread64(pml4e);
if (!PAGE_P(entry)) {
uint64_t page = alloc_page();
entry = page | PG_B_RW | PG_B_P | bits;
kwrite64(pml4e, entry);
}
uintptr_t pdpe = pa_to_dmap(PAGE_PA(entry)) + pmap_pdpe_index(va) * 8;
entry = kread64(pdpe);
if (!(entry & PG_B_P)) {
uint64_t page = alloc_page();
entry = page | PG_B_RW | PG_B_P | bits;
kwrite64(pdpe, entry);
}
uintptr_t pde = pa_to_dmap(PAGE_PA(entry)) + pmap_pde_index(va) * 8;
entry = kread64(pde);
if (!(entry & PG_B_P)) {
uint64_t page = alloc_page();
entry = page | PG_B_RW | PG_B_P | bits;
kwrite64(pde, entry);
}
uintptr_t pte = pa_to_dmap(PAGE_PA(entry)) + pmap_pte_index(va) * 8;
entry = pa | PG_B_RW | PG_B_P | bits;
pte_store(pte, entry);
}
void pte_store(uintptr_t ptep, uint64_t pte) {
static_assert((PAGE_SIZE % 0x1000) == 0,
"PAGE_SIZE should be a multiple of 0x1000");
for (uint64_t i = 0; i < (PAGE_SIZE / 0x1000); i++) {
kwrite64(ptep + i * 8, pte + i * 0x1000);
}
}
void install_page_syscore(vm_offset_t va, vm_paddr_t pa, int bits) {
uintptr_t syscore_pmap = getpmap(kernel_get_proc(MINI_SYSCORE_PID));
uintptr_t syscore_pml4 = kread64(syscore_pmap + 0x20);
install_page(syscore_pml4, va, pa, bits);
}