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List: openocd-development
Subject: [PATCH]: f6231e3533 target: aarch64: access reg SPSR_EL3 only in EL3
From: gerrit () openocd ! org
Date: 2024-05-14 12:52:34
Message-ID: 20240514125234.B85491B2 () 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/+/8270
-- gerrit
commit f6231e3533dc526fb8d9e88a579edeb48ad08010
Author: Antonio Borneo <borneo.antonio@gmail.com>
Date: Tue May 14 10:40:32 2024 +0200
target: aarch64: access reg SPSR_EL3 only in EL3
The register SPSR_EL3 is accessible and it's content is relevant
only when the target is in EL3.
Plus, the register is 64 bits wide.
Without this patch, an error:
Error: Opcode 0xd53e4000, DSCR.ERR=1, DSCR.EL=1
is triggered by GDB register window or through GDB command
x/p $SPSR_EL3
or through OpenOCD command
reg SPSR_EL3
Detect the EL and return error if the register cannot be accessed.
Handle the register as 64 bits.
Change-Id: I00849d99feeb96589c426fcafda98127dbd19a67
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
diff --git a/src/target/armv8.c b/src/target/armv8.c
index 383ac3ef4d..e8c189c1c8 100644
--- a/src/target/armv8.c
+++ b/src/target/armv8.c
@@ -361,9 +361,13 @@ static int armv8_read_reg(struct armv8_common *armv8, int \
regnum, uint64_t *regv value_64 = value;
break;
case ARMV8_SPSR_EL3:
- retval = dpm->instr_read_data_r0(dpm,
- ARMV8_MRS(SYSTEM_SPSR_EL3, 0), &value);
- value_64 = value;
+ if (curel < SYSTEM_CUREL_EL3) {
+ LOG_DEBUG("SPSR_EL3 not accessible in EL%u", curel);
+ retval = ERROR_FAIL;
+ break;
+ }
+ retval = dpm->instr_read_data_r0_64(dpm,
+ ARMV8_MRS(SYSTEM_SPSR_EL3, 0), &value_64);
break;
case ARMV8_PAUTH_CMASK:
case ARMV8_PAUTH_DMASK:
@@ -492,9 +496,13 @@ static int armv8_write_reg(struct armv8_common *armv8, int \
regnum, uint64_t valu ARMV8_MSR_GP(SYSTEM_SPSR_EL2, 0), value);
break;
case ARMV8_SPSR_EL3:
- value = value_64;
- retval = dpm->instr_write_data_r0(dpm,
- ARMV8_MSR_GP(SYSTEM_SPSR_EL3, 0), value);
+ if (curel < SYSTEM_CUREL_EL3) {
+ LOG_DEBUG("SPSR_EL3 not accessible in EL%u", curel);
+ retval = ERROR_FAIL;
+ break;
+ }
+ retval = dpm->instr_write_data_r0_64(dpm,
+ ARMV8_MSR_GP(SYSTEM_SPSR_EL3, 0), value_64);
break;
default:
retval = ERROR_FAIL;
@@ -1544,7 +1552,7 @@ static const struct {
NULL},
{ ARMV8_ESR_EL3, "ESR_EL3", 64, ARMV8_64_EL3H, REG_TYPE_UINT64, "banked", \
"net.sourceforge.openocd.banked", NULL},
- { ARMV8_SPSR_EL3, "SPSR_EL3", 32, ARMV8_64_EL3H, REG_TYPE_UINT32, "banked", \
"net.sourceforge.openocd.banked", + { ARMV8_SPSR_EL3, "SPSR_EL3", 64, ARMV8_64_EL3H, \
REG_TYPE_UINT64, "banked", "net.sourceforge.openocd.banked", NULL},
{ ARMV8_PAUTH_DMASK, "pauth_dmask", 64, ARM_MODE_ANY, REG_TYPE_UINT64, NULL, \
"org.gnu.gdb.aarch64.pauth", NULL}, { ARMV8_PAUTH_CMASK, "pauth_cmask", 64, \
ARM_MODE_ANY, REG_TYPE_UINT64, NULL, "org.gnu.gdb.aarch64.pauth", NULL},
--
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