feat(debug): add helpers for aborts on AARCH32
New helper functions are created to handle data & prefetch aborts
in AARCH32. They call platform functions, just like what
report_exception is doing.
As extended MSR/MRS instructions (to access lr_abt in monitor mode)
are only available if CPU (Armv7) has virtualization extension,
the functions branch to original report_exception handlers if this is
not the case.
Those new helpers are created mainly to distinguish data and prefetch
aborts, as they both share the same mode.
This adds 40 bytes of code.
Change-Id: I5dd31930344ad4e3a658f8a9d366a87a300aeb67
Signed-off-by: Yann Gautier <yann.gautier@st.com>
diff --git a/common/aarch32/debug.S b/common/aarch32/debug.S
index 9d410df..ae0bb7a 100644
--- a/common/aarch32/debug.S
+++ b/common/aarch32/debug.S
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2016-2020, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2016-2022, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -14,6 +14,8 @@
.globl asm_assert
.globl do_panic
.globl report_exception
+ .globl report_prefetch_abort
+ .globl report_data_abort
/* Since the max decimal input number is 65536 */
#define MAX_DEC_DIVISOR 10000
@@ -205,3 +207,33 @@
bl plat_report_exception
no_ret plat_panic_handler
endfunc report_exception
+
+ /***********************************************************
+ * This function is called from the vector table for
+ * unhandled exceptions. The lr_abt is given as an
+ * argument to platform handler.
+ ***********************************************************/
+func report_prefetch_abort
+#if ARM_ARCH_MAJOR == 7 && !defined(ARMV7_SUPPORTS_VIRTUALIZATION)
+ b report_exception
+#else
+ mrs r0, lr_abt
+ bl plat_report_prefetch_abort
+ no_ret plat_panic_handler
+#endif
+endfunc report_prefetch_abort
+
+ /***********************************************************
+ * This function is called from the vector table for
+ * unhandled exceptions. The lr_abt is given as an
+ * argument to platform handler.
+ ***********************************************************/
+func report_data_abort
+#if ARM_ARCH_MAJOR == 7 && !defined(ARMV7_SUPPORTS_VIRTUALIZATION)
+ b report_exception
+#else
+ mrs r0, lr_abt
+ bl plat_report_data_abort
+ no_ret plat_panic_handler
+#endif
+endfunc report_data_abort