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arm: remove exc_wrapper.S

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Not used anymore as the support for dynamic IRQs was removed by
commit 844e212.

Change-Id: I624bbd777b2dbcbf905cedc61e63cef21e8a0bce
Signed-off-by: Ricardo Salveti <ricardo.salveti@linaro.org>
This commit is contained in:
Ricardo Salveti 2016-10-03 22:47:21 -04:00 • committed by Anas Nashif
commit 1450f7bae4
2 changed files with 1 additions and 65 deletions
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2
arch/arm/core/cortex_m/Makefile
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@ -10,7 +10,7 @@ asflags-y = $(ccflags-y)
obj-y = vector_table.o reset.o \
nmi_on_reset.o prep_c.o scs.o scb.o nmi.o \
exc_manage.o exc_wrapper.o
exc_manage.o
obj-$(CONFIG_IRQ_VECTOR_TABLE_SOC) += irq_vector_table.o
obj-$(CONFIG_SW_ISR_TABLE) += sw_isr_table.o

64
arch/arm/core/cortex_m/exc_wrapper.S
View file

@ -1,64 +0,0 @@
/*
* Copyright (c) 2015 Wind River Systems, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @file dynamic exception handler wrapper
*/
#define _ASMLANGUAGE
#include <toolchain.h>
#include <arch/cpu.h>
_ASM_FILE_PROLOGUE
GDATA(_sw_exc_table)
GTEXT(_exc_wrapper)
SECTION_FUNC(TEXT, _exc_wrapper)
_GDB_STUB_EXC_ENTRY
ldr ip, =_SCS_ICSR
ldr ip, [ip]
ands.w ip, #_SCS_ICSR_RETTOBASE
itte eq /* is the RETTOBASE bit zero ? */
mrseq r0, MSP /* if so, we're not returning to thread mode, thus this
* is a nested exception: the stack frame is on the MSP */
addeq.w r0, #4 /* ESF returned here is off by 4 because of the push {r2}
* in_GDB_STUB_EXC_ENTRY */
mrsne r0, PSP /* if not, we are returning to thread mode, thus this is
* not a nested exception: the stack frame is on the PSP */
/* r0 now contains the pointer to the full ESF */
push {lr} /* lr is now the first item on the stack */
ldr r1, =_sw_exc_table
mrs r2, IPSR /* get exception number */
/* find and call handler: table is 4-bytes wide, shift index by 2 */
ldr r1, [r1, r2, LSL #2]
blx r1
pop {lr}
/* exception return is done in _ExcExit(), including _GDB_STUB_EXC_EXIT */
b _ExcExit
.end