mirror of
https://github.com/darlinghq/darling-xnu.git
synced 2024-11-23 12:39:55 +00:00
97 lines
3.2 KiB
C
97 lines
3.2 KiB
C
/*
|
|
* Copyright (c) 2019 Apple Computer, 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 <stdlib.h>
|
|
#include <darwintest.h>
|
|
#include <mach/mach.h>
|
|
#include <mach/thread_status.h>
|
|
|
|
T_GLOBAL_META(
|
|
T_META_NAMESPACE("xnu.arm"),
|
|
T_META_RUN_CONCURRENTLY(true)
|
|
);
|
|
|
|
#define PSR64_USER_MASK (0xFU << 28)
|
|
|
|
#if __arm64__
|
|
__attribute__((noreturn))
|
|
static void
|
|
phase2()
|
|
{
|
|
kern_return_t err;
|
|
arm_thread_state64_t ts;
|
|
mach_msg_type_number_t count = ARM_THREAD_STATE64_COUNT;
|
|
uint32_t nzcv = (uint32_t) __builtin_arm_rsr64("NZCV");
|
|
|
|
T_QUIET; T_ASSERT_EQ(nzcv & PSR64_USER_MASK, PSR64_USER_MASK, "All condition flags are set");
|
|
|
|
err = thread_get_state(mach_thread_self(), ARM_THREAD_STATE64, (thread_state_t)&ts, &count);
|
|
T_QUIET; T_ASSERT_EQ(err, KERN_SUCCESS, "Got own thread state after corrupting CPSR");
|
|
|
|
T_QUIET; T_ASSERT_EQ(ts.__cpsr & ~PSR64_USER_MASK, 0, "No privileged fields in CPSR are set");
|
|
|
|
exit(0);
|
|
}
|
|
#endif
|
|
|
|
T_DECL(thread_set_state_arm64_cpsr,
|
|
"Test that user mode cannot control privileged fields in CPSR/PSTATE.")
|
|
{
|
|
#if !__arm64__
|
|
T_SKIP("Running on non-arm64 target, skipping...");
|
|
#else
|
|
kern_return_t err;
|
|
mach_msg_type_number_t count;
|
|
arm_thread_state64_t ts;
|
|
|
|
count = ARM_THREAD_STATE64_COUNT;
|
|
err = thread_get_state(mach_thread_self(), ARM_THREAD_STATE64, (thread_state_t)&ts, &count);
|
|
T_QUIET; T_ASSERT_EQ(err, KERN_SUCCESS, "Got own thread state");
|
|
|
|
/*
|
|
* jump to the second phase while attempting to set all the bits
|
|
* in CPSR. If we survive the jump and read back CPSR without any
|
|
* bits besides condition flags set, the test passes. If kernel
|
|
* does not mask out the privileged CPSR bits correctly, we can
|
|
* expect an illegal instruction set panic due to SPSR.IL being
|
|
* set upon ERET to user mode.
|
|
*/
|
|
|
|
void *new_pc = (void *)&phase2;
|
|
arm_thread_state64_set_pc_fptr(ts, new_pc);
|
|
ts.__cpsr = ~0U;
|
|
|
|
err = thread_set_state(mach_thread_self(), ARM_THREAD_STATE64, (thread_state_t)&ts, ARM_THREAD_STATE64_COUNT);
|
|
|
|
/* NOT REACHED */
|
|
|
|
T_ASSERT_FAIL("Thread did not reach expected state. err = %d", err);
|
|
|
|
#endif
|
|
}
|