From b5dfef7577f87c34bd397981c17e5d461d1c217f Mon Sep 17 00:00:00 2001 From: Antonio Borneo Date: Tue, 14 May 2024 14:23:07 +0200 Subject: [PATCH] target: aarch64: access reg ESR_EL1 only in EL1, EL2 and EL3 The register ESR_EL1 is accessible and it's content is relevant only when the target is in EL1 or EL2 or EL3. Plus, the register is 64 bits wide. Without this patch, an error: Error: Opcode 0xd5385200, DSCR.ERR=1, DSCR.EL=1 is triggered by GDB register window or through GDB command x/p $ESR_EL1 or through OpenOCD command reg ESR_EL1 Detect the EL and return error if the register cannot be accessed. Handle the register as 64 bits. Change-Id: Icd65470c279e5cfd03091db6435cdaa1c447644c Signed-off-by: Antonio Borneo Reviewed-on: https://review.openocd.org/c/openocd/+/8275 Tested-by: jenkins --- src/target/armv8.c | 22 +++++++++++++++------- 1 file changed, 15 insertions(+), 7 deletions(-) diff --git a/src/target/armv8.c b/src/target/armv8.c index 176747013..14b172689 100644 --- a/src/target/armv8.c +++ b/src/target/armv8.c @@ -342,9 +342,13 @@ static int armv8_read_reg(struct armv8_common *armv8, int regnum, uint64_t *regv ARMV8_MRS(SYSTEM_ELR_EL3, 0), &value_64); break; case ARMV8_ESR_EL1: - retval = dpm->instr_read_data_r0(dpm, - ARMV8_MRS(SYSTEM_ESR_EL1, 0), &value); - value_64 = value; + if (curel < SYSTEM_CUREL_EL1) { + LOG_DEBUG("ESR_EL1 not accessible in EL%u", curel); + retval = ERROR_FAIL; + break; + } + retval = dpm->instr_read_data_r0_64(dpm, + ARMV8_MRS(SYSTEM_ESR_EL1, 0), &value_64); break; case ARMV8_ESR_EL2: if (curel < SYSTEM_CUREL_EL2) { @@ -495,9 +499,13 @@ static int armv8_write_reg(struct armv8_common *armv8, int regnum, uint64_t valu ARMV8_MSR_GP(SYSTEM_ELR_EL3, 0), value_64); break; case ARMV8_ESR_EL1: - value = value_64; - retval = dpm->instr_write_data_r0(dpm, - ARMV8_MSR_GP(SYSTEM_ESR_EL1, 0), value); + if (curel < SYSTEM_CUREL_EL1) { + LOG_DEBUG("ESR_EL1 not accessible in EL%u", curel); + retval = ERROR_FAIL; + break; + } + retval = dpm->instr_write_data_r0_64(dpm, + ARMV8_MSR_GP(SYSTEM_ESR_EL1, 0), value_64); break; case ARMV8_ESR_EL2: if (curel < SYSTEM_CUREL_EL2) { @@ -1572,7 +1580,7 @@ static const struct { { ARMV8_ELR_EL1, "ELR_EL1", 64, ARMV8_64_EL1H, REG_TYPE_CODE_PTR, "banked", "net.sourceforge.openocd.banked", NULL}, - { ARMV8_ESR_EL1, "ESR_EL1", 32, ARMV8_64_EL1H, REG_TYPE_UINT32, "banked", "net.sourceforge.openocd.banked", + { ARMV8_ESR_EL1, "ESR_EL1", 64, ARMV8_64_EL1H, REG_TYPE_UINT64, "banked", "net.sourceforge.openocd.banked", NULL}, { ARMV8_SPSR_EL1, "SPSR_EL1", 32, ARMV8_64_EL1H, REG_TYPE_UINT32, "banked", "net.sourceforge.openocd.banked", NULL},