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status.c
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status.c
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/*
* Copyright (c) 2007-2020 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#include <debug.h>
#include <mach/mach_types.h>
#include <mach/kern_return.h>
#include <mach/thread_status.h>
#include <kern/thread.h>
#include <kern/kalloc.h>
#include <arm/vmparam.h>
#include <arm/cpu_data_internal.h>
#include <arm/misc_protos.h>
#include <arm64/proc_reg.h>
#if __has_feature(ptrauth_calls)
#include <ptrauth.h>
#endif
struct arm_vfpv2_state {
__uint32_t __r[32];
__uint32_t __fpscr;
};
typedef struct arm_vfpv2_state arm_vfpv2_state_t;
#define ARM_VFPV2_STATE_COUNT \
((mach_msg_type_number_t)(sizeof (arm_vfpv2_state_t)/sizeof(uint32_t)))
/*
* Forward definitions
*/
void thread_set_child(thread_t child, int pid);
void thread_set_parent(thread_t parent, int pid);
static void free_debug_state(thread_t thread);
/*
* Maps state flavor to number of words in the state:
*/
/* __private_extern__ */
unsigned int _MachineStateCount[] = {
[ARM_UNIFIED_THREAD_STATE] = ARM_UNIFIED_THREAD_STATE_COUNT,
[ARM_VFP_STATE] = ARM_VFP_STATE_COUNT,
[ARM_EXCEPTION_STATE] = ARM_EXCEPTION_STATE_COUNT,
[ARM_DEBUG_STATE] = ARM_DEBUG_STATE_COUNT,
[ARM_THREAD_STATE64] = ARM_THREAD_STATE64_COUNT,
[ARM_EXCEPTION_STATE64] = ARM_EXCEPTION_STATE64_COUNT,
[ARM_THREAD_STATE32] = ARM_THREAD_STATE32_COUNT,
[ARM_DEBUG_STATE32] = ARM_DEBUG_STATE32_COUNT,
[ARM_DEBUG_STATE64] = ARM_DEBUG_STATE64_COUNT,
[ARM_NEON_STATE] = ARM_NEON_STATE_COUNT,
[ARM_NEON_STATE64] = ARM_NEON_STATE64_COUNT,
[ARM_PAGEIN_STATE] = ARM_PAGEIN_STATE_COUNT,
};
extern zone_t ads_zone;
#if __arm64__
/*
* Copy values from saved_state to ts64.
*/
void
saved_state_to_thread_state64(const arm_saved_state_t * saved_state,
arm_thread_state64_t * ts64)
{
uint32_t i;
assert(is_saved_state64(saved_state));
ts64->fp = get_saved_state_fp(saved_state);
ts64->lr = get_saved_state_lr(saved_state);
ts64->sp = get_saved_state_sp(saved_state);
ts64->pc = get_saved_state_pc(saved_state);
ts64->cpsr = get_saved_state_cpsr(saved_state);
for (i = 0; i < 29; i++) {
ts64->x[i] = get_saved_state_reg(saved_state, i);
}
}
/*
* Copy values from ts64 to saved_state
*/
void
thread_state64_to_saved_state(const arm_thread_state64_t * ts64,
arm_saved_state_t * saved_state)
{
uint32_t i;
#if __has_feature(ptrauth_calls)
boolean_t intr = ml_set_interrupts_enabled(FALSE);
#endif /* __has_feature(ptrauth_calls) */
assert(is_saved_state64(saved_state));
#if __has_feature(ptrauth_calls)
MANIPULATE_SIGNED_THREAD_STATE(saved_state,
"and w2, w2, %w[not_psr64_user_mask] \n"
"mov w6, %w[cpsr] \n"
"and w6, w6, %w[psr64_user_mask] \n"
"orr w2, w2, w6 \n"
"str w2, [x0, %[SS64_CPSR]] \n",
[cpsr] "r"(ts64->cpsr),
[psr64_user_mask] "i"(PSR64_USER_MASK),
[not_psr64_user_mask] "i"(~PSR64_USER_MASK)
);
/*
* Make writes to ts64->cpsr visible first, since it's useful as a
* canary to detect thread-state corruption.
*/
__builtin_arm_dmb(DMB_ST);
#else
set_saved_state_cpsr(saved_state,
(get_saved_state_cpsr(saved_state) & ~PSR64_USER_MASK) | (ts64->cpsr & PSR64_USER_MASK));
#endif /* __has_feature(ptrauth_calls) */
set_saved_state_fp(saved_state, ts64->fp);
set_saved_state_lr(saved_state, ts64->lr);
set_saved_state_sp(saved_state, ts64->sp);
set_saved_state_pc(saved_state, ts64->pc);
for (i = 0; i < 29; i++) {
set_saved_state_reg(saved_state, i, ts64->x[i]);
}
#if __has_feature(ptrauth_calls)
ml_set_interrupts_enabled(intr);
#endif /* __has_feature(ptrauth_calls) */
}
#endif /* __arm64__ */
static kern_return_t
handle_get_arm32_thread_state(thread_state_t tstate,
mach_msg_type_number_t * count,
const arm_saved_state_t * saved_state)
{
if (*count < ARM_THREAD_STATE32_COUNT) {
return KERN_INVALID_ARGUMENT;
}
if (!is_saved_state32(saved_state)) {
return KERN_INVALID_ARGUMENT;
}
(void)saved_state_to_thread_state32(saved_state, (arm_thread_state32_t *)tstate);
*count = ARM_THREAD_STATE32_COUNT;
return KERN_SUCCESS;
}
static kern_return_t
handle_get_arm64_thread_state(thread_state_t tstate,
mach_msg_type_number_t * count,
const arm_saved_state_t * saved_state)
{
if (*count < ARM_THREAD_STATE64_COUNT) {
return KERN_INVALID_ARGUMENT;
}
if (!is_saved_state64(saved_state)) {
return KERN_INVALID_ARGUMENT;
}
(void)saved_state_to_thread_state64(saved_state, (arm_thread_state64_t *)tstate);
*count = ARM_THREAD_STATE64_COUNT;
return KERN_SUCCESS;
}
static kern_return_t
handle_get_arm_thread_state(thread_state_t tstate,
mach_msg_type_number_t * count,
const arm_saved_state_t * saved_state)
{
/* In an arm64 world, this flavor can be used to retrieve the thread
* state of a 32-bit or 64-bit thread into a unified structure, but we
* need to support legacy clients who are only aware of 32-bit, so
* check the count to see what the client is expecting.
*/
if (*count < ARM_UNIFIED_THREAD_STATE_COUNT) {
return handle_get_arm32_thread_state(tstate, count, saved_state);
}
arm_unified_thread_state_t *unified_state = (arm_unified_thread_state_t *) tstate;
bzero(unified_state, sizeof(*unified_state));
#if __arm64__
if (is_saved_state64(saved_state)) {
unified_state->ash.flavor = ARM_THREAD_STATE64;
unified_state->ash.count = ARM_THREAD_STATE64_COUNT;
(void)saved_state_to_thread_state64(saved_state, thread_state64(unified_state));
} else
#endif
{
unified_state->ash.flavor = ARM_THREAD_STATE32;
unified_state->ash.count = ARM_THREAD_STATE32_COUNT;
(void)saved_state_to_thread_state32(saved_state, thread_state32(unified_state));
}
*count = ARM_UNIFIED_THREAD_STATE_COUNT;
return KERN_SUCCESS;
}
static kern_return_t
handle_set_arm32_thread_state(const thread_state_t tstate,
mach_msg_type_number_t count,
arm_saved_state_t * saved_state)
{
if (count != ARM_THREAD_STATE32_COUNT) {
return KERN_INVALID_ARGUMENT;
}
(void)thread_state32_to_saved_state((const arm_thread_state32_t *)tstate, saved_state);
return KERN_SUCCESS;
}
static kern_return_t
handle_set_arm64_thread_state(const thread_state_t tstate,
mach_msg_type_number_t count,
arm_saved_state_t * saved_state)
{
if (count != ARM_THREAD_STATE64_COUNT) {
return KERN_INVALID_ARGUMENT;
}
(void)thread_state64_to_saved_state((const arm_thread_state64_t *)tstate, saved_state);
return KERN_SUCCESS;
}
static kern_return_t
handle_set_arm_thread_state(const thread_state_t tstate,
mach_msg_type_number_t count,
arm_saved_state_t * saved_state)
{
/* In an arm64 world, this flavor can be used to set the thread state of a
* 32-bit or 64-bit thread from a unified structure, but we need to support
* legacy clients who are only aware of 32-bit, so check the count to see
* what the client is expecting.
*/
if (count < ARM_UNIFIED_THREAD_STATE_COUNT) {
if (!is_saved_state32(saved_state)) {
return KERN_INVALID_ARGUMENT;
}
return handle_set_arm32_thread_state(tstate, count, saved_state);
}
const arm_unified_thread_state_t *unified_state = (const arm_unified_thread_state_t *) tstate;
#if __arm64__
if (is_thread_state64(unified_state)) {
if (!is_saved_state64(saved_state)) {
return KERN_INVALID_ARGUMENT;
}
(void)thread_state64_to_saved_state(const_thread_state64(unified_state), saved_state);
} else
#endif
{
if (!is_saved_state32(saved_state)) {
return KERN_INVALID_ARGUMENT;
}
(void)thread_state32_to_saved_state(const_thread_state32(unified_state), saved_state);
}
return KERN_SUCCESS;
}
/*
* Translate thread state arguments to userspace representation
*/
kern_return_t
machine_thread_state_convert_to_user(
thread_t thread,
thread_flavor_t flavor,
thread_state_t tstate,
mach_msg_type_number_t *count)
{
#if __has_feature(ptrauth_calls)
arm_thread_state64_t *ts64;
switch (flavor) {
case ARM_THREAD_STATE:
{
arm_unified_thread_state_t *unified_state = (arm_unified_thread_state_t *)tstate;
if (*count < ARM_UNIFIED_THREAD_STATE_COUNT || !is_thread_state64(unified_state)) {
return KERN_SUCCESS;
}
ts64 = thread_state64(unified_state);
break;
}
case ARM_THREAD_STATE64:
{
if (*count < ARM_THREAD_STATE64_COUNT) {
return KERN_SUCCESS;
}
ts64 = (arm_thread_state64_t *)tstate;
break;
}
default:
return KERN_SUCCESS;
}
// Note that kernel threads never have disable_user_jop set
if (current_thread()->machine.disable_user_jop || !thread_is_64bit_addr(current_thread()) ||
thread->machine.disable_user_jop || !thread_is_64bit_addr(thread)
) {
ts64->flags = __DARWIN_ARM_THREAD_STATE64_FLAGS_NO_PTRAUTH;
return KERN_SUCCESS;
}
ts64->flags = 0;
if (ts64->lr) {
// lr might contain an IB-signed return address (strip is a no-op on unsigned addresses)
uintptr_t stripped_lr = (uintptr_t)ptrauth_strip((void *)ts64->lr,
ptrauth_key_return_address);
if (ts64->lr != stripped_lr) {
// Need to allow already-signed lr value to round-trip as is
ts64->flags |= __DARWIN_ARM_THREAD_STATE64_FLAGS_IB_SIGNED_LR;
}
// Note that an IB-signed return address that happens to have a 0 signature value
// will round-trip correctly even if IA-signed again below (and IA-authd later)
}
if (arm_user_jop_disabled()) {
return KERN_SUCCESS;
}
if (ts64->pc) {
ts64->pc = (uintptr_t)pmap_sign_user_ptr((void*)ts64->pc,
ptrauth_key_process_independent_code, ptrauth_string_discriminator("pc"),
thread->machine.jop_pid);
}
if (ts64->lr && !(ts64->flags & __DARWIN_ARM_THREAD_STATE64_FLAGS_IB_SIGNED_LR)) {
ts64->lr = (uintptr_t)pmap_sign_user_ptr((void*)ts64->lr,
ptrauth_key_process_independent_code, ptrauth_string_discriminator("lr"),
thread->machine.jop_pid);
}
if (ts64->sp) {
ts64->sp = (uintptr_t)pmap_sign_user_ptr((void*)ts64->sp,
ptrauth_key_process_independent_data, ptrauth_string_discriminator("sp"),
thread->machine.jop_pid);
}
if (ts64->fp) {
ts64->fp = (uintptr_t)pmap_sign_user_ptr((void*)ts64->fp,
ptrauth_key_process_independent_data, ptrauth_string_discriminator("fp"),
thread->machine.jop_pid);
}
return KERN_SUCCESS;
#else
// No conversion to userspace representation on this platform
(void)thread; (void)flavor; (void)tstate; (void)count;
return KERN_SUCCESS;
#endif /* __has_feature(ptrauth_calls) */
}
/*
* Translate thread state arguments from userspace representation
*/
kern_return_t
machine_thread_state_convert_from_user(
thread_t thread,
thread_flavor_t flavor,
thread_state_t tstate,
mach_msg_type_number_t count)
{
#if __has_feature(ptrauth_calls)
arm_thread_state64_t *ts64;
switch (flavor) {
case ARM_THREAD_STATE:
{
arm_unified_thread_state_t *unified_state = (arm_unified_thread_state_t *)tstate;
if (count < ARM_UNIFIED_THREAD_STATE_COUNT || !is_thread_state64(unified_state)) {
return KERN_SUCCESS;
}
ts64 = thread_state64(unified_state);
break;
}
case ARM_THREAD_STATE64:
{
if (count != ARM_THREAD_STATE64_COUNT) {
return KERN_SUCCESS;
}
ts64 = (arm_thread_state64_t *)tstate;
break;
}
default:
return KERN_SUCCESS;
}
// Note that kernel threads never have disable_user_jop set
if (current_thread()->machine.disable_user_jop || !thread_is_64bit_addr(current_thread())) {
if (thread->machine.disable_user_jop || !thread_is_64bit_addr(thread)) {
ts64->flags = __DARWIN_ARM_THREAD_STATE64_FLAGS_NO_PTRAUTH;
return KERN_SUCCESS;
}
// A JOP-disabled process must not set thread state on a JOP-enabled process
return KERN_PROTECTION_FAILURE;
}
if (ts64->flags & __DARWIN_ARM_THREAD_STATE64_FLAGS_NO_PTRAUTH) {
if (thread->machine.disable_user_jop || !thread_is_64bit_addr(thread)
) {
return KERN_SUCCESS;
}
// Disallow setting unsigned thread state on JOP-enabled processes.
// Ignore flag and treat thread state arguments as signed, ptrauth
// poisoning will cause resulting thread state to be invalid
ts64->flags &= ~__DARWIN_ARM_THREAD_STATE64_FLAGS_NO_PTRAUTH;
}
if (ts64->flags & __DARWIN_ARM_THREAD_STATE64_FLAGS_IB_SIGNED_LR) {
// lr might contain an IB-signed return address (strip is a no-op on unsigned addresses)
uintptr_t stripped_lr = (uintptr_t)ptrauth_strip((void *)ts64->lr,
ptrauth_key_return_address);
if (ts64->lr == stripped_lr) {
// Don't allow unsigned pointer to be passed through as is. Ignore flag and
// treat as IA-signed below (where auth failure may poison the value).
ts64->flags &= ~__DARWIN_ARM_THREAD_STATE64_FLAGS_IB_SIGNED_LR;
}
// Note that an IB-signed return address that happens to have a 0 signature value
// will also have been IA-signed (without this flag being set) and so will IA-auth
// correctly below.
}
if (arm_user_jop_disabled()) {
return KERN_SUCCESS;
}
if (ts64->pc) {
ts64->pc = (uintptr_t)pmap_auth_user_ptr((void*)ts64->pc,
ptrauth_key_process_independent_code, ptrauth_string_discriminator("pc"),
thread->machine.jop_pid);
}
if (ts64->lr && !(ts64->flags & __DARWIN_ARM_THREAD_STATE64_FLAGS_IB_SIGNED_LR)) {
ts64->lr = (uintptr_t)pmap_auth_user_ptr((void*)ts64->lr,
ptrauth_key_process_independent_code, ptrauth_string_discriminator("lr"),
thread->machine.jop_pid);
}
if (ts64->sp) {
ts64->sp = (uintptr_t)pmap_auth_user_ptr((void*)ts64->sp,
ptrauth_key_process_independent_data, ptrauth_string_discriminator("sp"),
thread->machine.jop_pid);
}
if (ts64->fp) {
ts64->fp = (uintptr_t)pmap_auth_user_ptr((void*)ts64->fp,
ptrauth_key_process_independent_data, ptrauth_string_discriminator("fp"),
thread->machine.jop_pid);
}
return KERN_SUCCESS;
#else
// No conversion from userspace representation on this platform
(void)thread; (void)flavor; (void)tstate; (void)count;
return KERN_SUCCESS;
#endif /* __has_feature(ptrauth_calls) */
}
/*
* Translate signal context data pointer to userspace representation
*/
kern_return_t
machine_thread_siguctx_pointer_convert_to_user(
thread_t thread,
user_addr_t *uctxp)
{
#if __has_feature(ptrauth_calls)
if (current_thread()->machine.disable_user_jop || !thread_is_64bit_addr(current_thread())) {
assert(thread->machine.disable_user_jop || !thread_is_64bit_addr(thread));
return KERN_SUCCESS;
}
if (arm_user_jop_disabled()) {
return KERN_SUCCESS;
}
if (*uctxp) {
*uctxp = (uintptr_t)pmap_sign_user_ptr((void*)*uctxp,
ptrauth_key_process_independent_data, ptrauth_string_discriminator("uctx"),
thread->machine.jop_pid);
}
return KERN_SUCCESS;
#else
// No conversion to userspace representation on this platform
(void)thread; (void)uctxp;
return KERN_SUCCESS;
#endif /* __has_feature(ptrauth_calls) */
}
/*
* Translate array of function pointer syscall arguments from userspace representation
*/
kern_return_t
machine_thread_function_pointers_convert_from_user(
thread_t thread,
user_addr_t *fptrs,
uint32_t count)
{
#if __has_feature(ptrauth_calls)
if (current_thread()->machine.disable_user_jop || !thread_is_64bit_addr(current_thread())) {
assert(thread->machine.disable_user_jop || !thread_is_64bit_addr(thread));
return KERN_SUCCESS;
}
if (arm_user_jop_disabled()) {
return KERN_SUCCESS;
}
while (count--) {
if (*fptrs) {
*fptrs = (uintptr_t)pmap_auth_user_ptr((void*)*fptrs,
ptrauth_key_function_pointer, 0, thread->machine.jop_pid);
}
fptrs++;
}
return KERN_SUCCESS;
#else
// No conversion from userspace representation on this platform
(void)thread; (void)fptrs; (void)count;
return KERN_SUCCESS;
#endif /* __has_feature(ptrauth_calls) */
}
/*
* Routine: machine_thread_get_state
*
*/
kern_return_t
machine_thread_get_state(thread_t thread,
thread_flavor_t flavor,
thread_state_t tstate,
mach_msg_type_number_t * count)
{
switch (flavor) {
case THREAD_STATE_FLAVOR_LIST:
if (*count < 4) {
return KERN_INVALID_ARGUMENT;
}
tstate[0] = ARM_THREAD_STATE;
tstate[1] = ARM_VFP_STATE;
tstate[2] = ARM_EXCEPTION_STATE;
tstate[3] = ARM_DEBUG_STATE;
*count = 4;
break;
case THREAD_STATE_FLAVOR_LIST_NEW:
if (*count < 4) {
return KERN_INVALID_ARGUMENT;
}
tstate[0] = ARM_THREAD_STATE;
tstate[1] = ARM_VFP_STATE;
tstate[2] = thread_is_64bit_data(thread) ? ARM_EXCEPTION_STATE64 : ARM_EXCEPTION_STATE;
tstate[3] = thread_is_64bit_data(thread) ? ARM_DEBUG_STATE64 : ARM_DEBUG_STATE32;
*count = 4;
break;
case THREAD_STATE_FLAVOR_LIST_10_15:
if (*count < 5) {
return KERN_INVALID_ARGUMENT;
}
tstate[0] = ARM_THREAD_STATE;
tstate[1] = ARM_VFP_STATE;
tstate[2] = thread_is_64bit_data(thread) ? ARM_EXCEPTION_STATE64 : ARM_EXCEPTION_STATE;
tstate[3] = thread_is_64bit_data(thread) ? ARM_DEBUG_STATE64 : ARM_DEBUG_STATE32;
tstate[4] = ARM_PAGEIN_STATE;
*count = 5;
break;
case ARM_THREAD_STATE:
{
kern_return_t rn = handle_get_arm_thread_state(tstate, count, thread->machine.upcb);
if (rn) {
return rn;
}
break;
}
case ARM_THREAD_STATE32:
{
if (thread_is_64bit_data(thread)) {
return KERN_INVALID_ARGUMENT;
}
kern_return_t rn = handle_get_arm32_thread_state(tstate, count, thread->machine.upcb);
if (rn) {
return rn;
}
break;
}
#if __arm64__
case ARM_THREAD_STATE64:
{
if (!thread_is_64bit_data(thread)) {
return KERN_INVALID_ARGUMENT;
}
const arm_saved_state_t *current_state = thread->machine.upcb;
kern_return_t rn = handle_get_arm64_thread_state(tstate, count,
current_state);
if (rn) {
return rn;
}
break;
}
#endif
case ARM_EXCEPTION_STATE:{
struct arm_exception_state *state;
struct arm_saved_state32 *saved_state;
if (*count < ARM_EXCEPTION_STATE_COUNT) {
return KERN_INVALID_ARGUMENT;
}
if (thread_is_64bit_data(thread)) {
return KERN_INVALID_ARGUMENT;
}
state = (struct arm_exception_state *) tstate;
saved_state = saved_state32(thread->machine.upcb);
state->exception = saved_state->exception;
state->fsr = saved_state->esr;
state->far = saved_state->far;
*count = ARM_EXCEPTION_STATE_COUNT;
break;
}
case ARM_EXCEPTION_STATE64:{
struct arm_exception_state64 *state;
struct arm_saved_state64 *saved_state;
if (*count < ARM_EXCEPTION_STATE64_COUNT) {
return KERN_INVALID_ARGUMENT;
}
if (!thread_is_64bit_data(thread)) {
return KERN_INVALID_ARGUMENT;
}
state = (struct arm_exception_state64 *) tstate;
saved_state = saved_state64(thread->machine.upcb);
state->exception = saved_state->exception;
state->far = saved_state->far;
state->esr = saved_state->esr;
*count = ARM_EXCEPTION_STATE64_COUNT;
break;
}
case ARM_DEBUG_STATE:{
arm_legacy_debug_state_t *state;
arm_debug_state32_t *thread_state;
if (*count < ARM_LEGACY_DEBUG_STATE_COUNT) {
return KERN_INVALID_ARGUMENT;
}
if (thread_is_64bit_data(thread)) {
return KERN_INVALID_ARGUMENT;
}
state = (arm_legacy_debug_state_t *) tstate;
thread_state = find_debug_state32(thread);
if (thread_state == NULL) {
bzero(state, sizeof(arm_legacy_debug_state_t));
} else {
bcopy(thread_state, state, sizeof(arm_legacy_debug_state_t));
}
*count = ARM_LEGACY_DEBUG_STATE_COUNT;
break;
}
case ARM_DEBUG_STATE32:{
arm_debug_state32_t *state;
arm_debug_state32_t *thread_state;
if (*count < ARM_DEBUG_STATE32_COUNT) {
return KERN_INVALID_ARGUMENT;
}
if (thread_is_64bit_data(thread)) {
return KERN_INVALID_ARGUMENT;
}
state = (arm_debug_state32_t *) tstate;
thread_state = find_debug_state32(thread);
if (thread_state == NULL) {
bzero(state, sizeof(arm_debug_state32_t));
} else {
bcopy(thread_state, state, sizeof(arm_debug_state32_t));
}
*count = ARM_DEBUG_STATE32_COUNT;
break;
}
case ARM_DEBUG_STATE64:{
arm_debug_state64_t *state;
arm_debug_state64_t *thread_state;
if (*count < ARM_DEBUG_STATE64_COUNT) {
return KERN_INVALID_ARGUMENT;
}
if (!thread_is_64bit_data(thread)) {
return KERN_INVALID_ARGUMENT;
}
state = (arm_debug_state64_t *) tstate;
thread_state = find_debug_state64(thread);
if (thread_state == NULL) {
bzero(state, sizeof(arm_debug_state64_t));
} else {
bcopy(thread_state, state, sizeof(arm_debug_state64_t));
}
*count = ARM_DEBUG_STATE64_COUNT;
break;
}
case ARM_VFP_STATE:{
struct arm_vfp_state *state;
arm_neon_saved_state32_t *thread_state;
unsigned int max;
if (*count < ARM_VFP_STATE_COUNT) {
if (*count < ARM_VFPV2_STATE_COUNT) {
return KERN_INVALID_ARGUMENT;
} else {
*count = ARM_VFPV2_STATE_COUNT;
}
}
if (*count == ARM_VFPV2_STATE_COUNT) {
max = 32;
} else {
max = 64;
}
state = (struct arm_vfp_state *) tstate;
thread_state = neon_state32(thread->machine.uNeon);
/* ARM64 TODO: set fpsr and fpcr from state->fpscr */
bcopy(thread_state, state, (max + 1) * sizeof(uint32_t));
*count = (max + 1);
break;
}
case ARM_NEON_STATE:{
arm_neon_state_t *state;
arm_neon_saved_state32_t *thread_state;
if (*count < ARM_NEON_STATE_COUNT) {
return KERN_INVALID_ARGUMENT;
}
if (thread_is_64bit_data(thread)) {
return KERN_INVALID_ARGUMENT;
}
state = (arm_neon_state_t *)tstate;
thread_state = neon_state32(thread->machine.uNeon);
assert(sizeof(*thread_state) == sizeof(*state));
bcopy(thread_state, state, sizeof(arm_neon_state_t));
*count = ARM_NEON_STATE_COUNT;
break;
}
case ARM_NEON_STATE64:{
arm_neon_state64_t *state;
arm_neon_saved_state64_t *thread_state;
if (*count < ARM_NEON_STATE64_COUNT) {
return KERN_INVALID_ARGUMENT;
}
if (!thread_is_64bit_data(thread)) {
return KERN_INVALID_ARGUMENT;
}
state = (arm_neon_state64_t *)tstate;
thread_state = neon_state64(thread->machine.uNeon);
/* For now, these are identical */
assert(sizeof(*state) == sizeof(*thread_state));
bcopy(thread_state, state, sizeof(arm_neon_state64_t));
*count = ARM_NEON_STATE64_COUNT;
break;
}
case ARM_PAGEIN_STATE: {
arm_pagein_state_t *state;
if (*count < ARM_PAGEIN_STATE_COUNT) {
return KERN_INVALID_ARGUMENT;
}
state = (arm_pagein_state_t *)tstate;
state->__pagein_error = thread->t_pagein_error;
*count = ARM_PAGEIN_STATE_COUNT;
break;
}
default:
return KERN_INVALID_ARGUMENT;
}
return KERN_SUCCESS;
}
/*
* Routine: machine_thread_get_kern_state
*
*/
kern_return_t
machine_thread_get_kern_state(thread_t thread,
thread_flavor_t flavor,
thread_state_t tstate,
mach_msg_type_number_t * count)
{
/*
* This works only for an interrupted kernel thread
*/
if (thread != current_thread() || getCpuDatap()->cpu_int_state == NULL) {
return KERN_FAILURE;
}
switch (flavor) {
case ARM_THREAD_STATE:
{
kern_return_t rn = handle_get_arm_thread_state(tstate, count, getCpuDatap()->cpu_int_state);
if (rn) {
return rn;
}
break;
}
case ARM_THREAD_STATE32:
{
kern_return_t rn = handle_get_arm32_thread_state(tstate, count, getCpuDatap()->cpu_int_state);
if (rn) {
return rn;
}
break;
}
#if __arm64__
case ARM_THREAD_STATE64:
{
kern_return_t rn = handle_get_arm64_thread_state(tstate, count, getCpuDatap()->cpu_int_state);
if (rn) {
return rn;
}
break;
}
#endif
default:
return KERN_INVALID_ARGUMENT;
}
return KERN_SUCCESS;
}
void
machine_thread_switch_addrmode(thread_t thread)
{
if (task_has_64Bit_data(thread->task)) {
thread->machine.upcb->ash.flavor = ARM_SAVED_STATE64;
thread->machine.upcb->ash.count = ARM_SAVED_STATE64_COUNT;
thread->machine.uNeon->nsh.flavor = ARM_NEON_SAVED_STATE64;
thread->machine.uNeon->nsh.count = ARM_NEON_SAVED_STATE64_COUNT;
/*
* Reinitialize the NEON state.
*/
bzero(&thread->machine.uNeon->uns, sizeof(thread->machine.uNeon->uns));
thread->machine.uNeon->ns_64.fpcr = FPCR_DEFAULT;
} else {
thread->machine.upcb->ash.flavor = ARM_SAVED_STATE32;
thread->machine.upcb->ash.count = ARM_SAVED_STATE32_COUNT;
thread->machine.uNeon->nsh.flavor = ARM_NEON_SAVED_STATE32;
thread->machine.uNeon->nsh.count = ARM_NEON_SAVED_STATE32_COUNT;
/*
* Reinitialize the NEON state.
*/
bzero(&thread->machine.uNeon->uns, sizeof(thread->machine.uNeon->uns));
thread->machine.uNeon->ns_32.fpcr = FPCR_DEFAULT_32;
}
}
extern long long arm_debug_get(void);
/*
* Routine: machine_thread_set_state
*
*/
kern_return_t
machine_thread_set_state(thread_t thread,
thread_flavor_t flavor,
thread_state_t tstate,
mach_msg_type_number_t count)
{
kern_return_t rn;
switch (flavor) {
case ARM_THREAD_STATE:
rn = handle_set_arm_thread_state(tstate, count, thread->machine.upcb);
if (rn) {
return rn;
}
break;
case ARM_THREAD_STATE32:
if (thread_is_64bit_data(thread)) {
return KERN_INVALID_ARGUMENT;
}
rn = handle_set_arm32_thread_state(tstate, count, thread->machine.upcb);
if (rn) {
return rn;
}
break;
#if __arm64__
case ARM_THREAD_STATE64:
if (!thread_is_64bit_data(thread)) {
return KERN_INVALID_ARGUMENT;
}
rn = handle_set_arm64_thread_state(tstate, count, thread->machine.upcb);
if (rn) {
return rn;
}
break;
#endif
case ARM_EXCEPTION_STATE:{
if (count != ARM_EXCEPTION_STATE_COUNT) {
return KERN_INVALID_ARGUMENT;
}
if (thread_is_64bit_data(thread)) {
return KERN_INVALID_ARGUMENT;
}
break;
}
case ARM_EXCEPTION_STATE64:{
if (count != ARM_EXCEPTION_STATE64_COUNT) {
return KERN_INVALID_ARGUMENT;
}
if (!thread_is_64bit_data(thread)) {
return KERN_INVALID_ARGUMENT;
}
break;
}
case ARM_DEBUG_STATE:
{
arm_legacy_debug_state_t *state;
boolean_t enabled = FALSE;
unsigned int i;
if (count != ARM_LEGACY_DEBUG_STATE_COUNT) {
return KERN_INVALID_ARGUMENT;
}
if (thread_is_64bit_data(thread)) {