/*
* Copyright (c) 2018 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
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*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#include <arm64/asm.h>
#include <pexpert/arm64/board_config.h>
#if CONFIG_SPTM
.text
.align 2
.globl EXT(arm64_panic_lockdown_test_load)
LEXT(arm64_panic_lockdown_test_load)
ARM64_PROLOG
ldr x0, [x0]
ret
.globl EXT(arm64_panic_lockdown_test_gdbtrap)
LEXT(arm64_panic_lockdown_test_gdbtrap)
ARM64_PROLOG
.long 0xe7ffdefe
ret
#if __has_feature(ptrauth_calls)
.globl EXT(arm64_panic_lockdown_test_pac_brk_c470)
LEXT(arm64_panic_lockdown_test_pac_brk_c470)
ARM64_PROLOG
brk 0xC470
ret
.globl EXT(arm64_panic_lockdown_test_pac_brk_c471)
LEXT(arm64_panic_lockdown_test_pac_brk_c471)
ARM64_PROLOG
brk 0xC471
ret
.globl EXT(arm64_panic_lockdown_test_pac_brk_c472)
LEXT(arm64_panic_lockdown_test_pac_brk_c472)
ARM64_PROLOG
brk 0xC472
ret
.globl EXT(arm64_panic_lockdown_test_pac_brk_c473)
LEXT(arm64_panic_lockdown_test_pac_brk_c473)
ARM64_PROLOG
brk 0xC473
ret
.globl EXT(arm64_panic_lockdown_test_telemetry_brk_ff00)
LEXT(arm64_panic_lockdown_test_telemetry_brk_ff00)
ARM64_PROLOG
brk 0xFF00
ret
.globl EXT(arm64_panic_lockdown_test_br_auth_fail)
LEXT(arm64_panic_lockdown_test_br_auth_fail)
ARM64_PROLOG
braaz x0
ret
.globl EXT(arm64_panic_lockdown_test_ldr_auth_fail)
LEXT(arm64_panic_lockdown_test_ldr_auth_fail)
ARM64_PROLOG
ldraa x0, [x0]
ret
#endif /* ptrauth_calls */
#if __ARM_ARCH_8_6__
.globl EXT(arm64_panic_lockdown_test_fpac)
LEXT(arm64_panic_lockdown_test_fpac)
ARM64_PROLOG
autiza x0
ret
#endif /* __ARM_ARCH_8_6__ */
#if BTI_ENFORCED && CONFIG_BTI_TELEMETRY
.globl EXT(arm64_panic_lockdown_test_bti_telemetry)
LEXT(arm64_panic_lockdown_test_bti_telemetry)
ARM64_PROLOG
/*
* Trigger a BTI exception on the first instruction *after* the landing pad.
*/
0:
nop
adr x0, 0b
br x0
#endif /* BTI_ENFORCED && CONFIG_BTI_TELEMETRY */
/*
* SP1 Panic Lockdown Tests
*
* These tests are somewhat complex because we're round tripping through an
* exception vector which is not intended to return. This means we'll lose a
* fair amount of state. The only thing we can really rely on being preserved is
* SP_EL0 as we stay on SP1 for the entire vector. As such, we need to save all
* callee saved registers here.
*/
.macro SAVE_CALLEE_REGISTERS
stp x19, x20, [sp, #-(16 * 10)]!
stp x21, x22, [sp, #0x10]
stp x23, x24, [sp, #0x20]
stp x25, x26, [sp, #0x30]
stp x27, x28, [sp, #0x40]
stp x29, x30, [sp, #0x50]
stp q4, q5, [sp, #0x60]
stp q6, q7, [sp, #0x80]
.endmacro
.macro LOAD_CALLEE_REGISTERS
ldp x21, x22, [sp, #0x10]
ldp x23, x24, [sp, #0x20]
ldp x25, x26, [sp, #0x30]
ldp x27, x28, [sp, #0x40]
ldp x29, x30, [sp, #0x50]
ldp q4, q5, [sp, #0x60]
ldp q6, q7, [sp, #0x80]
ldp x19, x20, [sp], #(16*10)
.endmacro
/**
* arm64_panic_lockdown_test_sp1_invalid_stack
*
* This test simulates a stack overflow/corruption
*/
.globl EXT(arm64_panic_lockdown_test_sp1_invalid_stack)
LEXT(arm64_panic_lockdown_test_sp1_invalid_stack)
ARM64_STACK_PROLOG
SAVE_CALLEE_REGISTERS
/* Spill the real SP1 to the stack and trash the old one */
msr SPSel, #1
mov x0, sp
mov x1, #0
mov sp, x1
msr SPSel, #0
str x0, [sp, #-16]!
/* Take an exception on SP1 but outside the critical region */
msr SPSel, #1
b EXT(arm64_panic_lockdown_test_pac_brk_c470)
.global EXT(arm64_panic_lockdown_test_sp1_invalid_stack_handler)
LEXT(arm64_panic_lockdown_test_sp1_invalid_stack_handler)
/* If we made it here, the test passed. Fix the system up. */
mrs x0, SP_EL0
ldr x1, [x0], #16
/* Restore the real SP1 */
mov sp, x1
/* Update SP0 to prepare to return */
msr SPSel, #0
mov sp, x0
/* Return 1 to indicate success */
mov x0, #1
LOAD_CALLEE_REGISTERS
ARM64_STACK_EPILOG
/**
* arm64_panic_lockdown_test_sp1_exception_in_vector
* This test simulates an exception in the SP1 critical region
*/
.globl EXT(arm64_panic_lockdown_test_sp1_exception_in_vector)
LEXT(arm64_panic_lockdown_test_sp1_exception_in_vector)
ARM64_STACK_PROLOG
SAVE_CALLEE_REGISTERS
/* Trigger an exception inside the vector on SP1 */
msr SPSel, #1
b EXT(el1_sp1_synchronous_raise_exception_in_vector)
.globl EXT(arm64_panic_lockdown_test_sp1_exception_in_vector_handler)
LEXT(arm64_panic_lockdown_test_sp1_exception_in_vector_handler)
/* Return to SP0 */
msr SPSel, #0
/* Return 1 to indicate success */
mov x0, #1
LOAD_CALLEE_REGISTERS
ARM64_STACK_EPILOG
#endif /* CONFIG_SPTM */
#if BTI_ENFORCED
.text
.align 2
.global EXT(arm64_bti_test_jump_shim)
LEXT(arm64_bti_test_jump_shim)
ARM64_PROLOG
#if __has_feature(ptrauth_calls)
braaz x0
#else
br x0
#endif /* __has_feature(ptrauth_calls) */
.global EXT(arm64_bti_test_call_shim)
LEXT(arm64_bti_test_call_shim)
ARM64_STACK_PROLOG
PUSH_FRAME
#if __has_feature(ptrauth_calls)
blraaz x0
#else
blr x0
#endif /* __has_feature(ptrauth_calls) */
POP_FRAME
ARM64_STACK_EPILOG
.globl EXT(arm64_bti_test_func_with_no_landing_pad)
LEXT(arm64_bti_test_func_with_no_landing_pad)
mov x0, #1
ret
.globl EXT(arm64_bti_test_func_with_call_landing_pad)
LEXT(arm64_bti_test_func_with_call_landing_pad)
bti c
mov x0, #2
ret
.globl EXT(arm64_bti_test_func_with_jump_landing_pad)
LEXT(arm64_bti_test_func_with_jump_landing_pad)
bti j
mov x0, #3
ret
.globl EXT(arm64_bti_test_func_with_jump_call_landing_pad)
LEXT(arm64_bti_test_func_with_jump_call_landing_pad)
bti jc
mov x0, #4
ret
#if __has_feature(ptrauth_returns)
.globl EXT(arm64_bti_test_func_with_pac_landing_pad)
LEXT(arm64_bti_test_func_with_pac_landing_pad)
pacibsp
mov x0, #5
retab
#endif /* __has_feature(ptrauth_returns) */
#endif /* BTI_ENFORCED */