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List: openocd-development
Subject: [PATCH]: ab9102d3ae target: aarch64: access reg ELR_EL3 only in EL3
From: gerrit () openocd ! org
Date: 2024-05-14 12:52:34
Message-ID: 20240514125234.71375162 () openocd ! org
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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/+/8268
-- gerrit
commit ab9102d3ae3379846e23ab86012322f959a0d2b7
Author: Antonio Borneo <borneo.antonio@gmail.com>
Date: Mon May 13 18:19:55 2024 +0200
target: aarch64: access reg ELR_EL3 only in EL3
The register ELR_EL3 is accessible and it's content is relevant
only when the target is in EL3.
Without this patch, an error:
Error: Opcode 0xd53e4020, DSCR.ERR=1, DSCR.EL=1
is triggered by GDB register window or through GDB command
x/p $ELR_EL3
or through OpenOCD command
reg ELR_EL3
Detect the EL and return error if the register cannot be accessed.
Change-Id: I545abb196e5c34e462c7e5d5d3ec952e588642da
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
diff --git a/src/target/armv8.c b/src/target/armv8.c
index 8d97902f55..e36e2f6f41 100644
--- a/src/target/armv8.c
+++ b/src/target/armv8.c
@@ -278,6 +278,7 @@ static int armv8_get_pauth_mask(struct armv8_common *armv8, \
uint64_t *mask) static int armv8_read_reg(struct armv8_common *armv8, int regnum, \
uint64_t *regval) {
struct arm_dpm *dpm = &armv8->dpm;
+ unsigned int curel = armv8_curel_from_core_mode(dpm->arm->core_mode);
int retval;
uint32_t value;
uint64_t value_64;
@@ -322,6 +323,11 @@ static int armv8_read_reg(struct armv8_common *armv8, int \
regnum, uint64_t *regv ARMV8_MRS(SYSTEM_ELR_EL2, 0), &value_64);
break;
case ARMV8_ELR_EL3:
+ if (curel < SYSTEM_CUREL_EL3) {
+ LOG_DEBUG("ELR_EL3 not accessible in EL%u", curel);
+ retval = ERROR_FAIL;
+ break;
+ }
retval = dpm->instr_read_data_r0_64(dpm,
ARMV8_MRS(SYSTEM_ELR_EL3, 0), &value_64);
break;
@@ -396,6 +402,7 @@ static int armv8_read_reg_simdfp_aarch64(struct armv8_common \
*armv8, int regnum, static int armv8_write_reg(struct armv8_common *armv8, int \
regnum, uint64_t value_64) {
struct arm_dpm *dpm = &armv8->dpm;
+ unsigned int curel = armv8_curel_from_core_mode(dpm->arm->core_mode);
int retval;
uint32_t value;
@@ -443,6 +450,11 @@ static int armv8_write_reg(struct armv8_common *armv8, int \
regnum, uint64_t valu ARMV8_MSR_GP(SYSTEM_ELR_EL2, 0), value_64);
break;
case ARMV8_ELR_EL3:
+ if (curel < SYSTEM_CUREL_EL3) {
+ LOG_DEBUG("ELR_EL3 not accessible in EL%u", curel);
+ retval = ERROR_FAIL;
+ break;
+ }
retval = dpm->instr_write_data_r0_64(dpm,
ARMV8_MSR_GP(SYSTEM_ELR_EL3, 0), value_64);
break;
--
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