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thermosphere: add common asm macros

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TuxSH
2020-01-14 00:58:31 +00:00
parent 84a2dc4ad9
commit 3e7e658594
7 changed files with 101 additions and 121 deletions
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35
thermosphere/src/exception_vectors.s
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@@ -1,12 +1,27 @@
/*
* Copyright (c) 2018-2019 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/>.
*/
#include "asm_macros.s"
/* 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
*/
#define STACK_FRAME_SIZE 0x140
/*
* Declare the exception vector table, enforcing it is aligned on a
@@ -53,7 +68,7 @@
.endm
.macro SAVE_MOST_REGISTERS
sub sp, sp, #STACK_FRAME_SIZE
sub sp, sp, #EXCEP_STACK_FRAME_SIZE
stp x28, x29, [sp, #-0x20]
stp x30, xzr, [sp, #-0x10]
@@ -65,12 +80,12 @@
.macro PIVOT_STACK_FOR_CRASH
// Note: x18 assumed uncorrupted
// Note: replace sp_el0 with crashing sp
str x16, [x18, #8] // currentCoreCtx->scratch = x16
str x16, [x18, #CORECTX_SCRATCH_OFFSET]
mov x16, sp
msr sp_el0, x16
ldr x16, [x18, #0x10] // currentCoreCtx->crashStack
ldr x16, [x18, #CORECTX_CRASH_STACK_OFFSET]
mov sp, x16
ldr x16, [x18, #8]
ldr x16, [x18, #CORECTX_SCRATCH_OFFSET]
.endm
.equ EXCEPTION_TYPE_HOST, 0
@@ -88,8 +103,8 @@ vector_entry \name
mov x0, sp
.if \type == EXCEPTION_TYPE_GUEST
ldp x18, xzr, [sp, #STACK_FRAME_SIZE]
str x0, [x18] // currentCoreCtx->userFrame
ldp x18, xzr, [sp, #EXCEP_STACK_FRAME_SIZE]
str x0, [x18, #CORECTX_USER_FRAME_OFFSET]
mov w1, #1
.else
mov w1, #0
@@ -202,7 +217,7 @@ _restoreAllRegisters:
ldp x26, x27, [sp, #0xD0]
ldp x28, x29, [sp, #0xE0]
add sp, sp, #STACK_FRAME_SIZE
add sp, sp, #EXCEP_STACK_FRAME_SIZE
eret
UNKNOWN_EXCEPTION _serrorSp0