diff --git a/src/target/aarch64.c b/src/target/aarch64.c index 8c085d58e..b1534e363 100644 --- a/src/target/aarch64.c +++ b/src/target/aarch64.c @@ -1246,7 +1246,7 @@ static int aarch64_step(struct target *target, int current, target_addr_t addres { struct armv8_common *armv8 = target_to_armv8(target); int retval; - uint32_t tmp; + uint32_t edecr; if (target->state != TARGET_HALTED) { LOG_WARNING("target not halted"); @@ -1254,25 +1254,26 @@ static int aarch64_step(struct target *target, int current, target_addr_t addres } retval = mem_ap_read_atomic_u32(armv8->debug_ap, - armv8->debug_base + CPUV8_DBG_EDECR, &tmp); + armv8->debug_base + CPUV8_DBG_EDECR, &edecr); if (retval != ERROR_OK) return retval; + /* make sure EDECR.SS is not set when restoring the register */ + edecr &= ~0x4; + + /* set EDECR.SS to enter hardware step mode */ retval = mem_ap_write_atomic_u32(armv8->debug_ap, - armv8->debug_base + CPUV8_DBG_EDECR, (tmp|0x4)); + armv8->debug_base + CPUV8_DBG_EDECR, (edecr|0x4)); if (retval != ERROR_OK) return retval; - target->debug_reason = DBG_REASON_SINGLESTEP; + /* resume the target */ retval = aarch64_resume(target, current, address, 0, 0); if (retval != ERROR_OK) return retval; long long then = timeval_ms(); while (target->state != TARGET_HALTED) { - mem_ap_read_atomic_u32(armv8->debug_ap, - armv8->debug_base + CPUV8_DBG_EDESR, &tmp); - LOG_DEBUG("DESR = %#x", tmp); retval = aarch64_poll(target); if (retval != ERROR_OK) return retval; @@ -1282,15 +1283,12 @@ static int aarch64_step(struct target *target, int current, target_addr_t addres } } + /* restore EDECR */ retval = mem_ap_write_atomic_u32(armv8->debug_ap, - armv8->debug_base + CPUV8_DBG_EDECR, (tmp&(~0x4))); + armv8->debug_base + CPUV8_DBG_EDECR, edecr); if (retval != ERROR_OK) return retval; - target_call_event_callbacks(target, TARGET_EVENT_HALTED); - if (target->state == TARGET_HALTED) - LOG_DEBUG("target stepped"); - return ERROR_OK; } diff --git a/src/target/armv8_dpm.c b/src/target/armv8_dpm.c index 493ccca7e..08b1a204e 100644 --- a/src/target/armv8_dpm.c +++ b/src/target/armv8_dpm.c @@ -874,11 +874,14 @@ void armv8_dpm_report_dscr(struct arm_dpm *dpm, uint32_t dscr) target->debug_reason = DBG_REASON_DBGRQ; break; case DSCRV8_ENTRY_HALT_STEP_EXECLU: /* HALT step */ + case DSCRV8_ENTRY_HALT_STEP_NORMAL: /* Halt step*/ + case DSCRV8_ENTRY_HALT_STEP: + target->debug_reason = DBG_REASON_SINGLESTEP; + break; case DSCRV8_ENTRY_BKPT: /* SW BKPT */ case DSCRV8_ENTRY_RESET_CATCH: /* Reset catch */ case DSCRV8_ENTRY_OS_UNLOCK: /*OS unlock catch*/ case DSCRV8_ENTRY_EXCEPTION_CATCH: /*exception catch*/ - case DSCRV8_ENTRY_HALT_STEP_NORMAL: /* Halt step*/ case DSCRV8_ENTRY_SW_ACCESS_DBG: /*SW access dbg register*/ target->debug_reason = DBG_REASON_BREAKPOINT; break;