/* * 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 Kernel. */ .global _ZN3ams4kern16ExceptionVectorsEv vector_base _ZN3ams4kern16ExceptionVectorsEv /* Current EL, SP0 */ vector_entry synch_sp0 /* Just infinite loop. */ clrex nop b synch_sp0 check_vector_size synch_sp0 vector_entry irq_sp0 clrex nop b irq_sp0 check_vector_size irq_sp0 vector_entry fiq_sp0 clrex nop b fiq_sp0 check_vector_size fiq_sp0 vector_entry serror_sp0 clrex nop b serror_sp0 check_vector_size serror_sp0 /* Current EL, SPx */ vector_entry synch_spx clrex b _ZN3ams4kern4arch5arm6430EL1SynchronousExceptionHandlerEv check_vector_size synch_spx vector_entry irq_spx b _ZN3ams4kern4arch5arm6422EL1IrqExceptionHandlerEv check_vector_size irq_spx vector_entry fiq_spx clrex nop b fiq_spx check_vector_size fiq_spx vector_entry serror_spx clrex nop b _ZN3ams4kern4arch5arm6421EL1SystemErrorHandlerEv check_vector_size serror_spx /* Lower EL, A64 */ vector_entry synch_a64 clrex b _ZN3ams4kern4arch5arm6430EL0SynchronousExceptionHandlerEv check_vector_size synch_a64 vector_entry irq_a64 clrex b _ZN3ams4kern4arch5arm6422EL0IrqExceptionHandlerEv check_vector_size irq_a64 vector_entry fiq_a64 clrex nop b fiq_a64 check_vector_size fiq_a64 vector_entry serror_a64 clrex nop b _ZN3ams4kern4arch5arm6421EL0SystemErrorHandlerEv check_vector_size serror_a64 /* Lower EL, A32 */ vector_entry synch_a32 clrex b _ZN3ams4kern4arch5arm6430EL0SynchronousExceptionHandlerEv check_vector_size synch_a32 vector_entry irq_a32 clrex b _ZN3ams4kern4arch5arm6422EL0IrqExceptionHandlerEv check_vector_size irq_a32 vector_entry fiq_a32 clrex nop b fiq_a32 check_vector_size fiq_a32 vector_entry serror_a32 clrex nop b _ZN3ams4kern4arch5arm6421EL0SystemErrorHandlerEv check_vector_size serror_a32