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Add PS5 WiFi firmware initramfs loader support

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Add a CPIO wrapper to add new files/folders at initrd at runtime
Add early boot scripts (initramfs-tools for debian-based) support
This commit is contained in:
buzzer-re
2026-05-10 19:28:00 -03:00
parent 4355489449
commit 28e2ccd35a
11 changed files with 337 additions and 1 deletions
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74
source/cpio.c Normal file
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@@ -0,0 +1,74 @@
#include "cpio.h"
#include <stdio.h>
#include <string.h>
#define CPIO_NEWC_HEADER_LEN 110
static size_t cpio_newc_align4(size_t n) { return (n + 3) & ~3ULL; }
size_t cpio_newc_entry_size(const char *name, size_t data_size) {
return cpio_newc_align4(CPIO_NEWC_HEADER_LEN + strlen(name) + 1) +
cpio_newc_align4(data_size);
}
uint8_t *cpio_newc_data(uint8_t *entry, const char *name) {
return (uint8_t *)cpio_newc_align4((uintptr_t)entry + CPIO_NEWC_HEADER_LEN +
strlen(name) + 1);
}
uint8_t *cpio_newc_write_entry(uint8_t *out, const char *name, uint32_t mode,
const void *data, size_t data_size,
uint32_t ino) {
size_t name_size = strlen(name) + 1;
out = (uint8_t *)cpio_newc_align4((uintptr_t)out);
sprintf((char *)out,
"070701%08X%08X%08X%08X%08X%08X%08X%08X%08X%08X%08X%08X%08X",
ino, mode, 0, 0, 1, 0, (uint32_t)data_size, 0, 0, 0, 0,
(uint32_t)name_size, 0);
out += CPIO_NEWC_HEADER_LEN;
memcpy(out, name, name_size);
out += name_size;
out = (uint8_t *)cpio_newc_align4((uintptr_t)out);
if (data_size != 0 && data != out) {
memcpy(out, data, data_size);
}
out += data_size;
out = (uint8_t *)cpio_newc_align4((uintptr_t)out);
return out;
}
size_t cpio_newc_parent_dirs_size(const char *path) {
char tmp[256];
size_t total = 0;
snprintf(tmp, sizeof(tmp), "%s", path);
for (char *p = strchr(tmp, '/'); p != NULL; p = strchr(p + 1, '/')) {
*p = '\0';
if (tmp[0] != '\0')
total += cpio_newc_entry_size(tmp, 0);
*p = '/';
}
return total;
}
uint8_t *cpio_newc_write_parent_dirs(uint8_t *out, const char *path,
uint32_t *ino) {
char tmp[256];
snprintf(tmp, sizeof(tmp), "%s", path);
for (char *p = strchr(tmp, '/'); p != NULL; p = strchr(p + 1, '/')) {
*p = '\0';
if (tmp[0] != '\0') {
out = cpio_newc_write_entry(out, tmp, CPIO_MODE_DIR, NULL, 0, (*ino)++);
}
*p = '/';
}
return out;
}

176
source/firmware.c Normal file
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@@ -0,0 +1,176 @@
#include "firmware.h"
#include "cpio.h"
#include "utils.h"
#include <stdint.h>
#include <string.h>
#include <sys/mman.h>
#define FIRMWARE_CPIO_INO_BASE 0x500000
#define INITRAMFS_COPY_SCRIPT_MAX_BLOBS 2
#define PS5_WIFI_FW_CPIO_PATH "usr/lib/firmware/nxp/pcieuartiw620_combo_v1.bin"
#define PS5_WIFI_FW_DISPATCHER_PATH "conf/param.conf"
#define PS5_WIFI_FW_COPY_SCRIPT_UBUNTU_PATH "scripts/ubuntu/ps5-wifi-fw"
#define INCBIN(name, path) \
__asm__(".section .rodata\n" \
".balign 1\n" \
".globl " #name "\n" \
#name ":\n" \
".incbin \"" path "\"\n" \
".globl " #name "_end\n" \
#name "_end:\n" \
".previous\n"); \
extern const uint8_t name[]; \
extern const uint8_t name##_end[]
static_assert(sizeof(PS5_WIFI_FW_CPIO_PATH) <= 256,
"PS5 WiFi firmware cpio path too long");
static_assert(sizeof(PS5_WIFI_FW_DISPATCHER_PATH) <= 256,
"PS5 WiFi firmware dispatcher path too long");
static_assert(sizeof(PS5_WIFI_FW_COPY_SCRIPT_UBUNTU_PATH) <= 256,
"PS5 WiFi firmware script path too long");
INCBIN(initramfs_script_ubuntu_initramfs_tools,
"scripts/ubuntu/initramfs-tools");
INCBIN(initramfs_script_ubuntu_ps5_wifi_fw, "scripts/ubuntu/ps5-wifi-fw");
struct initramfs_blob {
const char *path;
const uint8_t *data;
size_t size;
};
struct initramfs_copy_script {
const char *distro;
struct initramfs_blob blobs[INITRAMFS_COPY_SCRIPT_MAX_BLOBS];
size_t count;
};
static size_t incbin_size(const uint8_t *start, const uint8_t *end) {
return (size_t)(end - start);
}
static struct initramfs_copy_script load_initramfs_copy_script(void) {
struct initramfs_copy_script script = {
.distro = "ubuntu",
.count = 2,
};
script.blobs[0] = (struct initramfs_blob){
.path = PS5_WIFI_FW_COPY_SCRIPT_UBUNTU_PATH,
.data = initramfs_script_ubuntu_ps5_wifi_fw,
.size = incbin_size(initramfs_script_ubuntu_ps5_wifi_fw,
initramfs_script_ubuntu_ps5_wifi_fw_end),
};
script.blobs[1] = (struct initramfs_blob){
.path = PS5_WIFI_FW_DISPATCHER_PATH,
.data = initramfs_script_ubuntu_initramfs_tools,
.size = incbin_size(initramfs_script_ubuntu_initramfs_tools,
initramfs_script_ubuntu_initramfs_tools_end),
};
return script;
}
static size_t initramfs_blob_size(const struct initramfs_blob *blob) {
return cpio_newc_parent_dirs_size(blob->path) +
cpio_newc_entry_size(blob->path, blob->size);
}
static uint8_t *write_initramfs_blob(uint8_t *out,
const struct initramfs_blob *blob,
uint32_t *ino) {
out = cpio_newc_write_parent_dirs(out, blob->path, ino);
return cpio_newc_write_entry(out, blob->path, CPIO_MODE_FILE, blob->data,
blob->size, (*ino)++);
}
static size_t ps5_wifi_firmware_size(void) {
return (size_t)env_offset.PS5_WIFI_FW_SIZE;
}
static uint64_t ps5_wifi_firmware_va(void) {
return get_offset_va(env_offset.PS5_WIFI_FW_OFFSET);
}
static size_t
ps5_wifi_firmware_overlay_size(const struct initramfs_copy_script *script) {
size_t total = cpio_newc_parent_dirs_size(PS5_WIFI_FW_CPIO_PATH) +
cpio_newc_entry_size(PS5_WIFI_FW_CPIO_PATH,
ps5_wifi_firmware_size());
for (size_t i = 0; i < script->count; i++)
total += initramfs_blob_size(&script->blobs[i]);
return total + cpio_newc_entry_size("TRAILER!!!", 0);
}
static void read_kernel_blob(uint64_t va, uint8_t *out, size_t size) {
for (size_t copied = 0; copied < size; copied += 0x4000) {
size_t chunk = size - copied;
if (chunk > 0x4000)
chunk = 0x4000;
kread(va + copied, out + copied, chunk);
}
}
static size_t
write_ps5_wifi_firmware_overlay(void *overlay,
const struct initramfs_copy_script *script) {
uint8_t *out = (uint8_t *)overlay;
uint8_t *payload;
uint32_t ino = FIRMWARE_CPIO_INO_BASE;
size_t fw_size = ps5_wifi_firmware_size();
out = cpio_newc_write_parent_dirs(out, PS5_WIFI_FW_CPIO_PATH, &ino);
payload = cpio_newc_data(out, PS5_WIFI_FW_CPIO_PATH);
read_kernel_blob(ps5_wifi_firmware_va(), payload, fw_size);
out = cpio_newc_write_entry(out, PS5_WIFI_FW_CPIO_PATH, CPIO_MODE_FILE,
payload, fw_size, ino++);
for (size_t i = 0; i < script->count; i++)
out = write_initramfs_blob(out, &script->blobs[i], &ino);
out = cpio_newc_write_entry(out, "TRAILER!!!", CPIO_MODE_FILE, NULL, 0,
ino++);
return (size_t)(out - (uint8_t *)overlay);
}
static int resolve_ps5_wifi_firmware(void **initrd, size_t *initrd_size) {
size_t old_initrd_size = *initrd_size;
struct initramfs_copy_script script = load_initramfs_copy_script();
size_t overlay_size;
void *extended_initrd;
if (env_offset.PS5_WIFI_FW_OFFSET == 0 || env_offset.PS5_WIFI_FW_SIZE == 0) {
notify("PS5 WiFi firmware offset missing for firmware %04x\n", fw);
return -1;
}
overlay_size = ps5_wifi_firmware_overlay_size(&script);
extended_initrd =
mmap(NULL, ALIGN_UP(old_initrd_size + overlay_size, 0x1000),
PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, -1, 0);
if (extended_initrd == MAP_FAILED) {
notify("[-] Error could not allocate extended initrd.\n");
return -1;
}
overlay_size = write_ps5_wifi_firmware_overlay(extended_initrd, &script);
memcpy((uint8_t *)extended_initrd + overlay_size, *initrd, old_initrd_size);
munmap(*initrd, ALIGN_UP(old_initrd_size, 0x1000));
*initrd = extended_initrd;
*initrd_size = overlay_size + old_initrd_size;
notify("Loaded PS5 WiFi firmware into initrd as /%s (%llu bytes, %s)\n",
PS5_WIFI_FW_CPIO_PATH,
(unsigned long long)ps5_wifi_firmware_size(),
script.distro);
return 0;
}
int resolve_device_firmwares(void **initrd, size_t *initrd_size) {
return resolve_ps5_wifi_firmware(initrd, initrd_size);
}

4
source/loader.c
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@@ -1,5 +1,6 @@
#include "loader.h"
#include "config.h"
#include "firmware.h"
#include "utils.h"
#include <errno.h>
#include <fcntl.h>
@@ -227,6 +228,9 @@ int fetch_linux(struct linux_info *info) {
return -1;
}
if (resolve_device_firmwares(&initrd, &initrd_size) < 0)
return -1;
size_t vram_size;
char buf_vram[16] = {};
int ret = find_and_read_file("vram.txt", buf_vram, sizeof(buf_vram) - 1);

18
source/offsets.c
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@@ -30,6 +30,8 @@ offset_list off_0300 = {
.KERNEL_UART_OVERRIDE = 0x1EB0258,
.KERNEL_DEBUG_PATCH = 0x0752460,
.KERNEL_CFI_CHECK = 0x0441DD0,
.PS5_WIFI_FW_OFFSET = 0x1274460,
.PS5_WIFI_FW_SIZE = 492304,
};
offset_list off_0310 = {
@@ -62,6 +64,8 @@ offset_list off_0310 = {
.KERNEL_UART_OVERRIDE = 0x1EB0258,
.KERNEL_DEBUG_PATCH = 0x07524A0,
.KERNEL_CFI_CHECK = 0x0441E10,
.PS5_WIFI_FW_OFFSET = 0x1274490,
.PS5_WIFI_FW_SIZE = 492304,
};
offset_list off_0320 = {
@@ -94,6 +98,8 @@ offset_list off_0320 = {
.KERNEL_UART_OVERRIDE = 0x1EB0258,
.KERNEL_DEBUG_PATCH = 0x7527F0,
.KERNEL_CFI_CHECK = 0x442160,
.PS5_WIFI_FW_OFFSET = 0x1274550,
.PS5_WIFI_FW_SIZE = 492304,
};
offset_list off_0321 = {
@@ -126,6 +132,8 @@ offset_list off_0321 = {
.KERNEL_UART_OVERRIDE = 0x1EB0258,
.KERNEL_DEBUG_PATCH = 0x7527F0,
.KERNEL_CFI_CHECK = 0x442160,
.PS5_WIFI_FW_OFFSET = 0x1274550,
.PS5_WIFI_FW_SIZE = 492304,
};
offset_list off_0400 = {
@@ -158,6 +166,8 @@ offset_list off_0400 = {
.KERNEL_UART_OVERRIDE = 0x1F522A8,
.KERNEL_DEBUG_PATCH = 0x77DA70,
.KERNEL_CFI_CHECK = 0x45A170,
.PS5_WIFI_FW_OFFSET = 0x1392FB0,
.PS5_WIFI_FW_SIZE = 493000,
};
offset_list off_0402 = {
@@ -190,6 +200,8 @@ offset_list off_0402 = {
.KERNEL_UART_OVERRIDE = 0x1F522A8,
.KERNEL_DEBUG_PATCH = 0x77DAC0,
.KERNEL_CFI_CHECK = 0x45A170,
.PS5_WIFI_FW_OFFSET = 0x1392FB0,
.PS5_WIFI_FW_SIZE = 493000,
};
offset_list off_0403 = {
@@ -222,6 +234,8 @@ offset_list off_0403 = {
.KERNEL_UART_OVERRIDE = 0x1F522A8,
.KERNEL_DEBUG_PATCH = 0x77DB50,
.KERNEL_CFI_CHECK = 0x45A170,
.PS5_WIFI_FW_OFFSET = 0x1392FB0,
.PS5_WIFI_FW_SIZE = 493000,
};
offset_list off_0450 = {
@@ -254,6 +268,8 @@ offset_list off_0450 = {
.KERNEL_UART_OVERRIDE = 0x1F522A8,
.KERNEL_DEBUG_PATCH = 0x77DC80,
.KERNEL_CFI_CHECK = 0x45A1A0,
.PS5_WIFI_FW_OFFSET = 0x1392FC0,
.PS5_WIFI_FW_SIZE = 493000,
};
offset_list off_0451 = {
@@ -286,4 +302,6 @@ offset_list off_0451 = {
.KERNEL_UART_OVERRIDE = 0x1F522A8,
.KERNEL_DEBUG_PATCH = 0x77DC90,
.KERNEL_CFI_CHECK = 0x45A1A0,
.PS5_WIFI_FW_OFFSET = 0x1393000,
.PS5_WIFI_FW_SIZE = 493000,
};