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some more tyding

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This commit is contained in:
Mateico
2026-05-13 11:09:19 +02:00
parent e439d8d36a
commit 9d58e22a77
10 changed files with 168 additions and 196 deletions
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4
include/loader.h
View File

@@ -1,3 +1,5 @@
#ifndef LOADER_H
#define LOADER_H
#include "utils.h"
#include <stdint.h>
@@ -7,3 +9,5 @@ void pte_store(uintptr_t ptep, uint64_t pte);
int read_file(const char *path, void *buf, size_t bufsize);
void trim_newline(char *s);
int fetch_linux(struct linux_info *info);
#endif

12
include/prepare_resume.h Normal file
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@@ -0,0 +1,12 @@
#ifndef PREPARE_RESUME_H
#define PREPARE_RESUME_H
#include "utils.h"
extern struct linux_info linux_i;
int prepare_resume(void);
int update_sck_data_ptr (void* sc, uint64_t dest_text, uint64_t dest_data);
void hook_call_near(uint64_t hook, uint64_t dst);
void prepare_sck_args(uint64_t dest_data);
#endif

13
include/utils.h
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@@ -2,6 +2,7 @@
#define UTILS_H
#include "offsets.h"
#include "linux.h"
#include <ps5/kernel.h>
#include <stdarg.h>
#include <stdint.h>
@@ -45,6 +46,18 @@ extern uint32_t fw; // Defined on utils.c
extern uint64_t vmcb_pa[16]; // Defined on hv_defeat.c
extern struct linux_info linux_i; // Declared on main.c
int setup_env(void);
static inline void kwrite_large(uint64_t ka, void* src, uint64_t len) {
uint32_t CHUNK = 0x1000;
uint64_t written = 0;
while (written < len) {
uint32_t n = (len - written > CHUNK) ? CHUNK : (uint32_t)(len - written);
kernel_copyin(src + written, ka + written, n);
written += n;
}
}
static inline void kwrite(uint64_t ka, void *src, uint64_t len) {
kernel_copyin(src, ka, len);
}

2
shellcode_hv/utils.c
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@@ -95,12 +95,10 @@ void wrmsr(uint32_t msr, uint64_t val) {
__asm__ __volatile__("wrmsr" : : "a"(low), "d"(high), "c"(msr));
}
// Map FreeBSD atomic_add_32 to GCC builtin
void atomic_add_32(volatile uint32_t *p, uint32_t v) {
__sync_fetch_and_add(p, v);
}
// Map FreeBSD atomic_cmpset_32 to GCC builtin
int atomic_cmpset_32(volatile uint32_t *dst, uint32_t exp, uint32_t src) {
return __sync_bool_compare_and_swap(dst, exp, src);
}

17
shellcode_kernel/boot_linux.c
View File

@@ -12,11 +12,11 @@
#define TRANSMITTER_CONTROL_ENABLE 1
#define TRANSMITTER_CONTROL_SET_VOLTAGE_AND_PREEMPASIS 11
int (*transmitter_control)(int cmd, void *control) = NULL; // Filled by main.c
int (*mp3_initialize)(int vmid) = NULL; // Filled by main.c
int (*mp3_invoke)(int cmd_id, void *req, void *rsp) = NULL; // Filled by main.c
int (*transmitter_control)(int cmd, void *control) = NULL;
int (*mp3_initialize)(int vmid) = NULL;
int (*mp3_invoke)(int cmd_id, void *req, void *rsp) = NULL;
uint64_t g_vbios; // Filled by main.c
uint64_t g_vbios;
typedef struct {
uint8_t lanenum;
@@ -88,11 +88,10 @@ static int mp3_enable_output(int be, int mode) {
static void patch_hv(void) {
// Install identity map for HV
// HV Shellcode 1 it's updating CR3
uint64_t identity_cr3 = cave_hv_paging; // P, RW, US=0
uint64_t identity_cr3 = cave_hv_paging;
uint64_t identity_pml4_0 =
identity_cr3 +
0x1003ULL; // P, RW, US=0 - 512GB // offset 0 +0x1000 from PML4
0x1003ULL;
uint64_t l40_l3_addr = PAGE_PA(identity_pml4_0); // addr PML4[0]
uint64_t identity_pml40_l3[] = {
0x0000000000000083, // P, RW, US=0 - 0 GB to 1 GB
@@ -161,8 +160,8 @@ void boot_linux(void) {
// Copy bzImage and initrd into contiguous memory.
memcpy(&info, (void *)args.linux_info_va, sizeof(struct linux_info));
uintptr_t bzimage = info.bzimage; // Kernel wrote the VA here
uintptr_t initrd = info.initrd; // Kernel wrote the VA here
uintptr_t bzimage = info.bzimage;
uintptr_t initrd = info.initrd;
info.bzimage = cave_bzImage;
info.initrd = cave_bzImage + ALIGN_UP(info.bzimage_size, PAGE_SIZE);

52
shellcode_kernel/main.c
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@@ -3,18 +3,12 @@
#include "utils.h"
#include <stdint.h>
#define MSR_EFER 0xC0000080
shellcode_kernel_args args = {0};
shellcode_kernel_args args = {
.fw_version = 0xDEADBEEF, .fun_printf = 0x0, .vmcb = {0}};
// We are being called instead of AcpiSetFirmwareWakingVector from
// acpi_wakeup_machdep
// We are being called instead of AcpiSetFirmwareWakingVector
__attribute__((section(".entry_point"))) uint32_t main(uint64_t add1,
uint64_t add2) {
// We will do main checks on .text only with a reference to .data to avoid
// fixed offsets first After NPTs are disabled, we can continue nornmally
// using all the variables in .data that are embedded in shellcode
// We will do main checks on .text only with a reference to .data
volatile shellcode_kernel_args *args_ptr =
(volatile shellcode_kernel_args
*)0x11AA11AA11AA11AA; // To be replaced with proper address in .kdata
@@ -54,13 +48,11 @@ __attribute__((section(".entry_point"))) uint32_t main(uint64_t add1,
goto out;
}
// Wait for completion
ret = ((uint64_t(*)(void))args_ptr->fun_hv_iommu_wait_completion)();
if (ret == 0) {
puts_uart(args_ptr->dmap_base, (char[]){"IOMMU sb OK\n"});
// Allow R/W on HV and Kernel area
if (tmr_disable(args_ptr->dmap_base)) {
puts_uart(args_ptr->dmap_base, (char[]){"TMR X\n"});
goto out;
@@ -68,7 +60,6 @@ __attribute__((section(".entry_point"))) uint32_t main(uint64_t add1,
puts_uart(args_ptr->dmap_base, (char[]){"TMR OK\n"});
// Patch HV
patch_vmcb(args_ptr);
puts_uart(args_ptr->dmap_base, (char[]){"VMCB OK\n"});
@@ -90,9 +81,6 @@ __attribute__((section(".entry_point"))) uint32_t main(uint64_t add1,
boot_linux();
printf("Linux prepared OK\n");
// Activate HV UART - Not really needed but good for debugging
// *(uint32_t*)PHYS_TO_DMAP(args.hv_uart_override_pa) = 0x0;
printf("Calling smp_rendezvous to exit all cores to HV with ptr: %016lx\n",
(uint64_t)vmmcall_dummy);
printf("Good Bye VM :)\n");
@@ -120,32 +108,28 @@ void halt(void) { __asm__ __volatile__("hlt"); }
// Submit a single 16-byte command and wait for completion
__attribute__((noinline, optimize("O0"))) void
iommu_submit_cmd(volatile shellcode_kernel_args *args_ptr, uint64_t *cmd) {
// Read the offset of current tail of command list
uint64_t curr_tail = *(
(uint64_t *)args_ptr->iommu_mmio_va +
IOMMU_MMIO_CB_TAIL /
8); // Offset in IOMMU Command Buffer - Downscale the size of the ptr
8);
uint64_t next_tail = (curr_tail + IOMMU_CMD_ENTRY_SIZE) &
IOMMU_CB_MASK; // Offset in IOMMU Command Buffer
IOMMU_CB_MASK;
// We write the command in the current empty entry
uint64_t *cmd_buffer = (uint64_t *)args_ptr->iommu_cb2_va +
curr_tail / 8; // Downscale the size of the ptr
// Copy 0x10 bytes (CMD Size)
curr_tail / 8;
cmd_buffer[0] = cmd[0];
cmd_buffer[1] = cmd[1];
__asm__ volatile("" : : : "memory"); // Prevent reordering
// Indicate the IOMMU that there is a CMD - Downscale the size of the ptr
__asm__ volatile("" : : : "memory");
*((uint64_t *)args_ptr->iommu_mmio_va + IOMMU_MMIO_CB_TAIL / 8) = next_tail;
// Wait CMD processing completion - Head will be the Tail
while (*((uint64_t *)args_ptr->iommu_mmio_va + IOMMU_MMIO_CB_HEAD / 8) !=
*((uint64_t *)args_ptr->iommu_mmio_va + IOMMU_MMIO_CB_TAIL / 8))
;
}
// Write 8 bytes to a physical address using IOMMU completion wait store
__attribute__((noinline, optimize("O0"))) void
iommu_write8_pa(volatile shellcode_kernel_args *args_ptr, uint64_t pa,
uint64_t val) {
@@ -161,21 +145,17 @@ __attribute__((noinline, optimize("O0"))) void
patch_vmcb(volatile shellcode_kernel_args *args_ptr) {
for (int i = 0; i < 16; i++) {
uint64_t pa = args_ptr->vmcb[i];
// args_ptr->fun_printf("Patching core: %02d VMCB_PA: 0x%016lx\n", i,
// args_ptr->vmcb[i]);
iommu_write8_pa(args_ptr, pa + 0x00,
0x0000000000000000ULL); // Clear all intercepts (R/W) to
// CR0-CR15 and DR0-DR15
0x0000000000000000ULL);
iommu_write8_pa(args_ptr, pa + 0x08,
0x0004000000000000ULL); // Clear all intercepts of except.
// vectors but CPUID
0x0004000000000000ULL);
iommu_write8_pa(args_ptr, pa + 0x10,
0x000000000000000FULL); // Clear all except VMMCALL, VMLOAD,
// VMSAVE, VMRUN
0x000000000000000FULL);
iommu_write8_pa(args_ptr, pa + 0x58,
0x0000000000000001ULL); // Guest ASID ... 1 ?
0x0000000000000001ULL);
iommu_write8_pa(args_ptr, pa + 0x90,
0x0000000000000000ULL); // Disable NP_ENABLE
0x0000000000000000ULL);
}
}
@@ -191,8 +171,6 @@ tmr_write(uint64_t dmap, uint32_t addr, uint32_t val) {
*(uint32_t *)(dmap + ECAM_B0D18F2 + TMR_DATA_OFF) = val;
}
// On 1.xx and 2.xx the HV is embedded in kernel area on TMR 16
// On 3.xx and 4.xx there are multiple TMR protecting HV and Kernel
__attribute__((noinline, optimize("O0"))) int tmr_disable(uint64_t dmap) {
for (int i = 0; i < 24; i++) {
if (tmr_read(dmap, TMR_CONFIG(i)) != 0) {

8
shellcode_kernel/utils.c
View File

@@ -16,20 +16,18 @@ void memcpy(void *dest, void *src, uint64_t len) {
uint64_t read_cr3(void) {
uint64_t cr3;
__asm__ volatile("mov %%cr3, %0"
: "=r"(cr3) // Output: move CR3 into the variable 'cr3'
: // No inputs
: // No clobbered registers
: "=r"(cr3)
:
:
);
return cr3;
}
// for ring0
uint64_t va_to_pa_kernel(uint64_t va) {
uint64_t cr3 = read_cr3();
return va_to_pa_custom(va, cr3);
}
// Source: PS5_kldload
uint64_t va_to_pa_custom(uint64_t va, uint64_t cr3_custom) {
uint64_t table_phys = cr3_custom & 0xFFFFFFFF;

147
source/main.c
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@@ -1,13 +1,8 @@
#include "main.h"
#include "../shellcode_kernel/shellcode_kernel.h"
#include "../shellcode_kernel/shellcode_kernel_args.h"
#include "hv_defeat.h"
#include "linux.h"
#include "loader.h"
#include "offsets.h"
#include "utils.h"
#include <stdio.h>
#include <unistd.h>
#include "utils.h"
#include "hv_defeat.h"
#include "prepare_resume.h"
#include "loader.h"
int main(void) {
if (setup_env()) {
@@ -44,137 +39,3 @@ int main(void) {
return 0;
}
int setup_env(void) {
notify("Welcome to ps5-linux-loader. We'll defeat HV and prepare the system "
"to boot Linux on sleep resume.\n");
if (set_offsets())
return -1;
if (init_global_vars())
return -1;
return 0;
}
int prepare_resume(void) {
if (env_offset.KERNEL_CODE_CAVE == 0) {
printf("Error: missing code cave offset\n");
return -1;
}
if (env_offset.KERNEL_DATA_CAVE == 0) {
printf("Error: missing data cave offset\n");
return -1;
}
printf("\nWriting Shell Code for WakeUp path and patching "
"AcpiSetFirmwareWakingVector in acpi_wakeup_machdep\n");
uint64_t dest_text = ktext + env_offset.KERNEL_CODE_CAVE;
uint64_t dest_data =
ktext + env_offset.KERNEL_DATA_CAVE; // For arguments only, rest of .data
// variables are in shellcode
uint64_t sz = shellcode_kernel_bin_len;
uint32_t CHUNK = 0x1000;
uint64_t written = 0;
while (written < sz) {
uint32_t n = (sz - written > CHUNK) ? CHUNK : (uint32_t)(sz - written);
kernel_copyin(&shellcode_kernel_bin[written], dest_text + written, n);
written += n;
}
DEBUG_PRINT(" copied %d bytes to text cave\n", sz);
DEBUG_PRINT("\n\nI wrote this shellcode text on %016lx (ktext+%08lx):\n",
dest_text, env_offset.KERNEL_CODE_CAVE);
for (uint64_t i = 0; i < sz; i++) {
DEBUG_PRINT("%02x", kread8(dest_text + i));
}
DEBUG_PRINT("\n\n");
shellcode_kernel_args args;
// Fill structure of ShellCode Arguments
args.fw_version = kernel_get_fw_version() & 0xFFFF0000;
args.ktext = ktext;
args.kdata = kdata;
args.dmap_base = dmap;
args.fun_printf = ktext + env_offset.FUN_PRINTF;
args.fun_va_to_pa = ktext + env_offset.FUN_VA_TO_PA;
args.fun_hv_iommu_set_buffers = ktext + env_offset.FUN_HV_IOMMU_SET_BUFFERS;
args.fun_hv_iommu_wait_completion =
ktext + env_offset.FUN_HV_IOMM_WAIT_COMPLETION;
args.fun_smp_rendezvous = ktext + env_offset.FUN_SMP_RENDEZVOUS;
args.fun_smp_no_rendevous_barrier =
ktext + env_offset.FUN_SMP_NO_RENDEVOUS_BARRIER;
args.g_vbios = ktext + env_offset.G_VBIOS;
args.fun_transmitter_control = ktext + env_offset.FUN_TRANSMITTER_CONTROL;
args.fun_mp3_initialize = ktext + env_offset.FUN_MP3_INITIALIZE;
args.fun_mp3_invoke = ktext + env_offset.FUN_MP3_INVOKE;
args.iommu_mmio_va = iommu->mmio_va;
args.iommu_cb2_va = iommu->cb2_base;
args.iommu_cb3_va = iommu->cb3_base;
args.iommu_eb_va = iommu->eb_base;
memcpy(&args.vmcb[0], &vmcb_pa[0], sizeof(args.vmcb[0]) * 16);
args.kernel_uart_override = ktext + env_offset.KERNEL_UART_OVERRIDE;
args.hv_handle_vmexit_pa = env_offset.HV_HANDLE_VMEXIT_PA;
args.hv_code_cave_pa = env_offset.HV_CODE_CAVE_PA;
args.hv_uart_override_pa = env_offset.HV_UART_OVERRIDE_PA;
args.linux_info_va = linux_i.linux_info; // To relocate by kernel shellcode
// bzimage_va and initrd_va are passed in the linux_info structure
// Copy arguments to small .data cave
kernel_copyin(&args, dest_data, sizeof(args));
DEBUG_PRINT("\n\nI wrote this arguments data on %016lx (ktext+%08lx):\n",
dest_data, env_offset.KERNEL_DATA_CAVE);
for (uint64_t i = 0; i < sz; i++) {
DEBUG_PRINT("%02x", kread8(dest_data + i));
}
DEBUG_PRINT("\n\n");
// Now find the address 0x11AA11AA11AA11AA used as marker for args_ptr and
// overwrite it with proper VA in .data for arguments
int offset = -1;
for (int i = 0; i < 0x40; i++) {
if (*(uint64_t *)((uint64_t)shellcode_kernel_bin + i) ==
0x11AA11AA11AA11AA) {
offset = i;
break;
}
}
if (offset == -1) {
notify("Could not find offset of args_ptr address - Aborting\n");
}
kwrite64(dest_text + offset, dest_data);
DEBUG_PRINT("\n\nI wrote this ptr %016lx on %016lx (offset %08lx)\n",
dest_data, dest_text + offset, offset);
uint64_t instr_to_patch =
ktext +
env_offset.HOOK_ACPI_WAKEUP_MACHDEP; // AcpiSetFirmwareWakingVector
// in acpi_wakeup_machdep
int64_t diff_call = dest_text - instr_to_patch;
uint8_t new_instr[5];
new_instr[0] = 0xE8; // Call Near
*((uint32_t *)&new_instr[1]) =
(int32_t)(diff_call - 5); // Call Offset is relative to the next
// instruction and Call uses 5 bytes
// Patch instruction
kernel_copyin(new_instr, instr_to_patch, 5);
DEBUG_PRINT("Instruction patched\n");
// Patch debug exception
kwrite8(ktext + env_offset.KERNEL_DEBUG_PATCH, 0xC3);
// Patch cfi_check
kwrite8(ktext + env_offset.KERNEL_CFI_CHECK, 0xC3);
return 0;
}

99
source/prepare_resume.c Normal file
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@@ -0,0 +1,99 @@
#include <stdio.h>
#include <stdint.h>
#include "prepare_resume.h"
#include "iommu.h"
#include "../shellcode_kernel/shellcode_kernel.h"
#include "../shellcode_kernel/shellcode_kernel_args.h"
#include "offsets.h"
#include "utils.h"
int prepare_resume(void) {
if (env_offset.KERNEL_CODE_CAVE == 0) {
printf("Error: missing code cave offset\n");
return -1;
}
if (env_offset.KERNEL_DATA_CAVE == 0) {
printf("Error: missing data cave offset\n");
return -1;
}
uint64_t dest_text = ktext + env_offset.KERNEL_CODE_CAVE;
uint64_t dest_data = ktext + env_offset.KERNEL_DATA_CAVE;
kwrite_large(dest_text, shellcode_kernel_bin, shellcode_kernel_bin_len);
prepare_sck_args(dest_data);
if(update_sck_data_ptr(shellcode_kernel_bin, dest_text, dest_data))
return -1;
hook_call_near(ktext + env_offset.HOOK_ACPI_WAKEUP_MACHDEP, dest_text);
kwrite8(ktext + env_offset.KERNEL_DEBUG_PATCH, 0xC3);
kwrite8(ktext + env_offset.KERNEL_CFI_CHECK, 0xC3);
return 0;
}
int update_sck_data_ptr (void* sc, uint64_t dest_text, uint64_t dest_data) {
// Find the address 0x11AA11AA11AA11AA used as marker
int offset = -1;
for (int i = 0; i < 0x40; i++) {
if (*(uint64_t *)((uint64_t)sc + i) == 0x11AA11AA11AA11AA) {
offset = i;
break;
}
}
if (offset == -1) {
notify("Could not find offset of args_ptr address - Aborting\n");
return -1;
}
kwrite64(dest_text + offset, dest_data);
return 0;
}
void hook_call_near(uint64_t hook, uint64_t dst) {
int64_t diff_call = dst - hook;
uint8_t new_instr[5]; new_instr[0] = 0xE8;
*((uint32_t *)&new_instr[1]) = (int32_t)(diff_call - 5);
kernel_copyin(new_instr, hook, 5);
DEBUG_PRINT("Instruction patched\n");
}
void prepare_sck_args(uint64_t dest_data) {
shellcode_kernel_args args;
args.fw_version = kernel_get_fw_version() & 0xFFFF0000;
args.ktext = ktext;
args.kdata = kdata;
args.dmap_base = dmap;
args.fun_printf = ktext + env_offset.FUN_PRINTF;
args.fun_va_to_pa = ktext + env_offset.FUN_VA_TO_PA;
args.fun_hv_iommu_set_buffers = ktext + env_offset.FUN_HV_IOMMU_SET_BUFFERS;
args.fun_hv_iommu_wait_completion =
ktext + env_offset.FUN_HV_IOMM_WAIT_COMPLETION;
args.fun_smp_rendezvous = ktext + env_offset.FUN_SMP_RENDEZVOUS;
args.fun_smp_no_rendevous_barrier =
ktext + env_offset.FUN_SMP_NO_RENDEVOUS_BARRIER;
args.g_vbios = ktext + env_offset.G_VBIOS;
args.fun_transmitter_control = ktext + env_offset.FUN_TRANSMITTER_CONTROL;
args.fun_mp3_initialize = ktext + env_offset.FUN_MP3_INITIALIZE;
args.fun_mp3_invoke = ktext + env_offset.FUN_MP3_INVOKE;
args.iommu_mmio_va = iommu->mmio_va;
args.iommu_cb2_va = iommu->cb2_base;
args.iommu_cb3_va = iommu->cb3_base;
args.iommu_eb_va = iommu->eb_base;
memcpy(&args.vmcb[0], &vmcb_pa[0], sizeof(args.vmcb[0]) * 16);
args.kernel_uart_override = ktext + env_offset.KERNEL_UART_OVERRIDE;
args.hv_handle_vmexit_pa = env_offset.HV_HANDLE_VMEXIT_PA;
args.hv_code_cave_pa = env_offset.HV_CODE_CAVE_PA;
args.hv_uart_override_pa = env_offset.HV_UART_OVERRIDE_PA;
args.linux_info_va = linux_i.linux_info;
kernel_copyin(&args, dest_data, sizeof(args));
}

10
source/utils.c
View File

@@ -18,6 +18,16 @@ uint64_t cr3;
uint32_t fw;
struct linux_info linux_i;
int setup_env(void) {
notify("Welcome to ps5-linux-loader. We'll defeat HV and prepare the system "
"to boot Linux on sleep resume.\n");
if (set_offsets())
return -1;
if (init_global_vars())
return -1;
return 0;
}
int set_offsets(void) {
fw = kernel_get_fw_version() >> 16;
if (fw == 0)