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List: openocd-development
Subject: [PATCH]: a355772c6a target: aarch64: access reg ELR_EL1 only in EL1, EL2 and EL3
From: gerrit () openocd ! org
Date: 2024-05-14 12:52:35
Message-ID: 20240514125235.1A7E41B7 () openocd ! org
[Download RAW message or body]
This is an automated email from Gerrit.
"Antonio Borneo <borneo.antonio@gmail.com>" just uploaded a new patch set to Gerrit, \
which you can find at https://review.openocd.org/c/openocd/+/8274
-- gerrit
commit a355772c6af6ce4dddf2fc14a998756bee28b720
Author: Antonio Borneo <borneo.antonio@gmail.com>
Date: Tue May 14 14:17:39 2024 +0200
target: aarch64: access reg ELR_EL1 only in EL1, EL2 and EL3
The register ELR_EL1 is accessible and it's content is relevant
only when the target is in EL1 or EL2 or EL3.
Without this patch, an error:
Error: Opcode 0xd5384020, DSCR.ERR=1, DSCR.EL=1
is triggered by GDB register window or through GDB command
x/p $ELR_EL1
or through OpenOCD command
reg ELR_EL1
Detect the EL and return error if the register cannot be accessed.
Change-Id: I402dda4cd9dae502b05572fc6c1a8f0edf349bb1
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
diff --git a/src/target/armv8.c b/src/target/armv8.c
index b622dc990e..1767470138 100644
--- a/src/target/armv8.c
+++ b/src/target/armv8.c
@@ -315,6 +315,11 @@ static int armv8_read_reg(struct armv8_common *armv8, int \
regnum, uint64_t *regv value_64 = value;
break;
case ARMV8_ELR_EL1:
+ if (curel < SYSTEM_CUREL_EL1) {
+ LOG_DEBUG("ELR_EL1 not accessible in EL%u", curel);
+ retval = ERROR_FAIL;
+ break;
+ }
retval = dpm->instr_read_data_r0_64(dpm,
ARMV8_MRS(SYSTEM_ELR_EL1, 0), &value_64);
break;
@@ -463,6 +468,11 @@ static int armv8_write_reg(struct armv8_common *armv8, int \
regnum, uint64_t valu break;
/* registers clobbered by taking exception in debug state */
case ARMV8_ELR_EL1:
+ if (curel < SYSTEM_CUREL_EL1) {
+ LOG_DEBUG("ELR_EL1 not accessible in EL%u", curel);
+ retval = ERROR_FAIL;
+ break;
+ }
retval = dpm->instr_write_data_r0_64(dpm,
ARMV8_MSR_GP(SYSTEM_ELR_EL1, 0), value_64);
break;
--
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