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/*
* This file is part of the libpayload project.
*
* Copyright 2013 Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
exception_stack:
.align 5
.skip 0x2000, 0xa5
exception_stack_end:
.word exception_stack_end
exception_handler:
.word 0
.align 6
.arm
.global exception_table
exception_table:
b 1f
b 2f
b 3f
b 4f
b 5f
b 6f
b 7f
b 8f
1:
ldr sp, _not_used
b exception_common
2:
ldr sp, _undefined_instruction
b exception_common
3:
ldr sp, _software_interrupt
b exception_common
4:
ldr sp, _prefetch_abort
b exception_common
5:
ldr sp, _data_abort
b exception_common
6:
ldr sp, _not_used
b exception_common
7:
ldr sp, _irq
b exception_common
8:
ldr sp, _fiq
b exception_common
exception_common:
str sp, exception_handler
ldr sp, exception_stack_end
push { lr }
sub sp, sp, $8
push { r0 - r12 }
mov r0, sp
mov lr, pc
ldr pc, exception_handler
pop { r0 - r12 }
add sp, sp, $8
ldm sp!, { pc }^
_undefined_instruction: .word exception_undefined_instruction
_software_interrupt: .word exception_software_interrupt
_prefetch_abort: .word exception_prefetch_abort
_data_abort: .word exception_data_abort
_not_used: .word exception_not_used
_irq: .word exception_irq
_fiq: .word exception_fiq
.thumb
.global set_vbar
.thumb_func
set_vbar:
mcr p15, 0, r0, c12, c0, 0
bx lr
.global exception_test
.thumb_func
exception_test:
mov r1, $1
mov r0, pc
add r0, $3
ldr r1, [r1]
bx lr
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