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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66
source/loader.c
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@@ -19,59 +19,6 @@
#include <sys/types.h>
#include <unistd.h>
#define MINI_SYSCORE_PID 1
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);
}
}
const char *file_paths[] = {
"/mnt/usb0/", "/mnt/usb1/", "/mnt/usb2/",
"/mnt/usb3/", "/mnt/usb0/PS5/Linux/", "/mnt/usb1/PS5/Linux/",
@@ -179,9 +126,6 @@ void trim_newline(char *s) {
}
int fetch_linux(struct linux_info *info) {
uintptr_t syscore_pmap = getpmap(kernel_get_proc(MINI_SYSCORE_PID));
uintptr_t syscore_pml4 = kread64(syscore_pmap + 0x20);
char bzimage_path[256];
char initrd_path[256];
@@ -269,16 +213,16 @@ int fetch_linux(struct linux_info *info) {
uint64_t page = alloc_page();
kwrite(pa_to_dmap(page), info, sizeof(struct linux_info));
install_page(syscore_pml4, kernel_cave_linux_info, page, 0);
install_page_syscore(kernel_cave_linux_info, page, 0);
for (int i = 0; i < bzimage_size; i += PAGE_SIZE) {
install_page(syscore_pml4, info->bzimage + i,
vtophys_user((uintptr_t)bzimage + i), 0);
install_page_syscore(info->bzimage + i,
vtophys_user((uintptr_t)bzimage + i), 0);
}
for (int i = 0; i < initrd_size; i += PAGE_SIZE) {
install_page(syscore_pml4, info->initrd + i,
vtophys_user((uintptr_t)initrd + i), 0);
install_page_syscore(info->initrd + i, vtophys_user((uintptr_t)initrd + i),
0);
}
return 0;