mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-30 15:52:15 +00:00
326 lines
9.1 KiB
ArmAsm
326 lines
9.1 KiB
ArmAsm
/*
|
|
* Copyright (c) 2018-2020 Atmosphère-NX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/* Some macros taken from https://github.com/ARM-software/arm-trusted-firmware/blob/master/include/common/aarch64/asm_macros.S */
|
|
/*
|
|
* Copyright (c) 2013-2017, ARM Limited and Contributors. All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
/*
|
|
* Declare the exception vector table, enforcing it is aligned on a
|
|
* 2KB boundary, as required by the ARMv8 architecture.
|
|
* Use zero bytes as the fill value to be stored in the padding bytes
|
|
* so that it inserts illegal AArch64 instructions. This increases
|
|
* security, robustness and potentially facilitates debugging.
|
|
*/
|
|
.macro vector_base label, section_name=.vectors
|
|
.section \section_name, "ax"
|
|
.align 11, 0
|
|
\label:
|
|
.endm
|
|
|
|
/*
|
|
* Create an entry in the exception vector table, enforcing it is
|
|
* aligned on a 128-byte boundary, as required by the ARMv8 architecture.
|
|
* Use zero bytes as the fill value to be stored in the padding bytes
|
|
* so that it inserts illegal AArch64 instructions. This increases
|
|
* security, robustness and potentially facilitates debugging.
|
|
*/
|
|
.macro vector_entry label, section_name=.vectors
|
|
.cfi_sections .debug_frame
|
|
.section \section_name, "ax"
|
|
.align 7, 0
|
|
.type \label, %function
|
|
.func \label
|
|
.cfi_startproc
|
|
\label:
|
|
.endm
|
|
|
|
/*
|
|
* This macro verifies that the given vector doesnt exceed the
|
|
* architectural limit of 32 instructions. This is meant to be placed
|
|
* immediately after the last instruction in the vector. It takes the
|
|
* vector entry as the parameter
|
|
*/
|
|
.macro check_vector_size since
|
|
.endfunc
|
|
.cfi_endproc
|
|
.if (. - \since) > (32 * 4)
|
|
.error "Vector exceeds 32 instructions"
|
|
.endif
|
|
.endm
|
|
|
|
/* Actual Vectors for Secure Monitor. */
|
|
.global _ZN3ams6secmon16ExceptionVectorsEv
|
|
vector_base _ZN3ams6secmon16ExceptionVectorsEv
|
|
|
|
/* Current EL, SP0 */
|
|
vector_entry synch_sp0
|
|
/* Branch to the exception handler. */
|
|
b _ZN3ams6secmon26UnexpectedExceptionHandlerEv
|
|
.endfunc
|
|
.cfi_endproc
|
|
_ZN3ams6secmon26UnexpectedExceptionHandlerEv:
|
|
/* Load the ErrorInfo scratch. */
|
|
ldr x0, =0x1F004AC40
|
|
|
|
/* Write ErrorInfo_UnknownAbort to it. */
|
|
ldr w1, =0x07F00010
|
|
str w1, [x0]
|
|
|
|
/* Perform an error reboot. */
|
|
b _ZN3ams6secmon11ErrorRebootEv
|
|
|
|
vector_entry irq_sp0
|
|
/* An unexpected exception was taken. */
|
|
b _ZN3ams6secmon26UnexpectedExceptionHandlerEv
|
|
check_vector_size irq_sp0
|
|
|
|
vector_entry fiq_sp0
|
|
/* An unexpected exception was taken. */
|
|
b _ZN3ams6secmon26UnexpectedExceptionHandlerEv
|
|
check_vector_size fiq_sp0
|
|
|
|
vector_entry serror_sp0
|
|
/* An unexpected exception was taken. */
|
|
b _ZN3ams6secmon26UnexpectedExceptionHandlerEv
|
|
check_vector_size serror_sp0
|
|
|
|
/* Current EL, SPx */
|
|
vector_entry synch_spx
|
|
/* An unexpected exception was taken. */
|
|
b _ZN3ams6secmon26UnexpectedExceptionHandlerEv
|
|
check_vector_size synch_spx
|
|
|
|
vector_entry irq_spx
|
|
/* An unexpected exception was taken. */
|
|
b _ZN3ams6secmon26UnexpectedExceptionHandlerEv
|
|
check_vector_size irq_spx
|
|
|
|
vector_entry fiq_spx
|
|
/* An unexpected exception was taken. */
|
|
b _ZN3ams6secmon26UnexpectedExceptionHandlerEv
|
|
check_vector_size fiq_spx
|
|
|
|
vector_entry serror_spx
|
|
/* An unexpected exception was taken. */
|
|
b _ZN3ams6secmon26UnexpectedExceptionHandlerEv
|
|
check_vector_size serror_spx
|
|
|
|
/* Lower EL, A64 */
|
|
vector_entry synch_a64
|
|
/* Check whether the exception is an SMC. If it's not, take the unexpected handler. */
|
|
stp x29, x30, [sp, #-0x10]!
|
|
mrs x30, esr_el3
|
|
lsr w29, w30, #26
|
|
cmp w29, #0x17
|
|
ldp x29, x30, [sp], #0x10
|
|
b.ne _ZN3ams6secmon26UnexpectedExceptionHandlerEv
|
|
|
|
/* Save x29 and x30. */
|
|
stp x29, x30, [sp, #-0x10]!
|
|
|
|
/* Get the current core. */
|
|
mrs x29, mpidr_el1
|
|
and x29, x29, #3
|
|
|
|
/* If we're not on core 3, take the core0-2 handler. */
|
|
cmp x29, #3
|
|
b.ne _ZN3ams6secmon25HandleSmcExceptionCore012Ev
|
|
|
|
/* Handle the smc. */
|
|
bl _ZN3ams6secmon18HandleSmcExceptionEv
|
|
|
|
/* Return. */
|
|
ldp x29, x30, [sp], #0x10
|
|
eret
|
|
check_vector_size synch_a64
|
|
|
|
vector_entry irq_a64
|
|
/* An unexpected exception was taken. */
|
|
b _ZN3ams6secmon26UnexpectedExceptionHandlerEv
|
|
check_vector_size irq_a64
|
|
|
|
vector_entry fiq_a64
|
|
/* Save X29, X30. */
|
|
stp x29, x30, [sp, #-0x10]!
|
|
|
|
/* Get the current core ID, ensure it's core 3. */
|
|
mrs x29, mpidr_el1
|
|
and x29, x29, #3
|
|
cmp x29, #3
|
|
b.ne _ZN3ams6secmon26UnexpectedExceptionHandlerEv
|
|
|
|
/* Save x26-x28, x18. */
|
|
stp x28, x18, [sp, #-0x10]!
|
|
stp x26, x27, [sp, #-0x10]!
|
|
|
|
/* Set x18 to the global data region. */
|
|
ldr x18, =0x1F01FA000
|
|
|
|
/* Handle the fiq exception. */
|
|
bl _ZN3ams6secmon18HandleFiqExceptionEv
|
|
|
|
/* Restore registers. */
|
|
ldp x26, x27, [sp], #0x10
|
|
ldp x28, x18, [sp], #0x10
|
|
ldp x29, x30, [sp], #0x10
|
|
|
|
/* Return. */
|
|
eret
|
|
check_vector_size fiq_a64
|
|
|
|
vector_entry serror_a64
|
|
/* An unexpected exception was taken. */
|
|
b _ZN3ams6secmon26UnexpectedExceptionHandlerEv
|
|
.endfunc
|
|
.cfi_endproc
|
|
_ZN3ams6secmon25HandleSmcExceptionCore012Ev:
|
|
/* Acquire exclusive access to the common smc stack. */
|
|
stp x4, x5, [sp, #-0x10]!
|
|
stp x2, x3, [sp, #-0x10]!
|
|
stp x0, x1, [sp, #-0x10]!
|
|
bl _ZN3ams6secmon25AcquireCommonSmcStackLockEv
|
|
ldp x0, x1, [sp], #0x10
|
|
ldp x2, x3, [sp], #0x10
|
|
ldp x4, x5, [sp], #0x10
|
|
|
|
/* Pivot to use the common smc stack. */
|
|
mov x30, sp
|
|
ldr x29, =0x1F01F6E80
|
|
mov sp, x29
|
|
stp x29, x30, [sp, #-0x10]!
|
|
|
|
/* Handle the SMC. */
|
|
bl _ZN3ams6secmon18HandleSmcExceptionEv
|
|
|
|
/* Restore our core-specific stack. */
|
|
ldp x29, x30, [sp], #0x10
|
|
mov sp, x30
|
|
|
|
/* Release our exclusive access to the common smc stack. */
|
|
stp x0, x1, [sp, #-0x10]!
|
|
bl _ZN3ams6secmon25ReleaseCommonSmcStackLockEv
|
|
ldp x0, x1, [sp], #0x10
|
|
|
|
/* Return. */
|
|
ldp x29, x30, [sp], #0x10
|
|
eret
|
|
|
|
/* Lower EL, A32 */
|
|
vector_entry synch_a32
|
|
/* An unexpected exception was taken. */
|
|
b _ZN3ams6secmon26UnexpectedExceptionHandlerEv
|
|
check_vector_size synch_a32
|
|
|
|
vector_entry irq_a32
|
|
/* An unexpected exception was taken. */
|
|
b _ZN3ams6secmon26UnexpectedExceptionHandlerEv
|
|
.endfunc
|
|
.cfi_endproc
|
|
_ZN3ams6secmon18HandleSmcExceptionEv:
|
|
/* Save registers. */
|
|
stp x29, x30, [sp, #-0x10]!
|
|
stp x18, x19, [sp, #-0x10]!
|
|
stp x16, x17, [sp, #-0x10]!
|
|
stp x14, x15, [sp, #-0x10]!
|
|
stp x12, x13, [sp, #-0x10]!
|
|
stp x10, x11, [sp, #-0x10]!
|
|
stp x8, x9, [sp, #-0x10]!
|
|
stp x6, x7, [sp, #-0x10]!
|
|
stp x4, x5, [sp, #-0x10]!
|
|
stp x2, x3, [sp, #-0x10]!
|
|
stp x0, x1, [sp, #-0x10]!
|
|
|
|
/* Set x18 to the global data region. */
|
|
ldr x18, =0x1F01FA000
|
|
|
|
/* Get esr. */
|
|
mrs x0, esr_el3
|
|
and x0, x0, #0xFFFF
|
|
|
|
/* Get the function arguments. */
|
|
mov x1, sp
|
|
|
|
/* Invoke the smc handler. */
|
|
bl _ZN3ams6secmon3smc9HandleSmcEiRNS1_12SmcArgumentsE
|
|
|
|
/* Restore registers. */
|
|
ldp x0, x1, [sp], #0x10
|
|
ldp x2, x3, [sp], #0x10
|
|
ldp x4, x5, [sp], #0x10
|
|
ldp x6, x7, [sp], #0x10
|
|
ldp x8, x9, [sp], #0x10
|
|
ldp x10, x11, [sp], #0x10
|
|
ldp x12, x13, [sp], #0x10
|
|
ldp x14, x15, [sp], #0x10
|
|
ldp x16, x17, [sp], #0x10
|
|
ldp x18, x19, [sp], #0x10
|
|
ldp x29, x30, [sp], #0x10
|
|
|
|
ret
|
|
vector_entry fiq_a32
|
|
/* Handle fiq from a32 the same as fiq from a64. */
|
|
b fiq_a64
|
|
.endfunc
|
|
.cfi_endproc
|
|
_ZN3ams6secmon18HandleFiqExceptionEv:
|
|
/* Save registers. */
|
|
stp x29, x30, [sp, #-0x10]!
|
|
stp x24, x25, [sp, #-0x10]!
|
|
stp x22, x23, [sp, #-0x10]!
|
|
stp x20, x21, [sp, #-0x10]!
|
|
stp x18, x19, [sp, #-0x10]!
|
|
stp x16, x17, [sp, #-0x10]!
|
|
stp x14, x15, [sp, #-0x10]!
|
|
stp x12, x13, [sp, #-0x10]!
|
|
stp x10, x11, [sp, #-0x10]!
|
|
stp x8, x9, [sp, #-0x10]!
|
|
stp x6, x7, [sp, #-0x10]!
|
|
stp x4, x5, [sp, #-0x10]!
|
|
stp x2, x3, [sp, #-0x10]!
|
|
stp x0, x1, [sp, #-0x10]!
|
|
|
|
/* Invoke the interrupt handler. */
|
|
bl _ZN3ams6secmon15HandleInterruptEv
|
|
|
|
/* Restore registers. */
|
|
ldp x0, x1, [sp], #0x10
|
|
ldp x2, x3, [sp], #0x10
|
|
ldp x4, x5, [sp], #0x10
|
|
ldp x6, x7, [sp], #0x10
|
|
ldp x8, x9, [sp], #0x10
|
|
ldp x10, x11, [sp], #0x10
|
|
ldp x12, x13, [sp], #0x10
|
|
ldp x14, x15, [sp], #0x10
|
|
ldp x16, x17, [sp], #0x10
|
|
ldp x18, x19, [sp], #0x10
|
|
ldp x20, x21, [sp], #0x10
|
|
ldp x22, x23, [sp], #0x10
|
|
ldp x24, x25, [sp], #0x10
|
|
ldp x29, x30, [sp], #0x10
|
|
|
|
ret
|
|
|
|
vector_entry serror_a32
|
|
/* An unexpected exception was taken. */
|
|
b _ZN3ams6secmon26UnexpectedExceptionHandlerEv
|
|
check_vector_size serror_a32
|
|
|
|
/* Instantiate the literal pool for the exception vectors. */
|
|
.ltorg
|