diff options
| -rw-r--r-- | src/target/aarch64.c | 36 |
1 files changed, 29 insertions, 7 deletions
diff --git a/src/target/aarch64.c b/src/target/aarch64.c index bcfce659..14a2da6c 100644 --- a/src/target/aarch64.c +++ b/src/target/aarch64.c @@ -642,9 +642,11 @@ static int aarch64_prepare_restart_one(struct target *target) armv8->debug_base + CPUV8_DBG_DSCR, dscr); } - /* clear sticky bits in PRSR, SDR is now 0 */ - retval = mem_ap_read_atomic_u32(armv8->debug_ap, - armv8->debug_base + CPUV8_DBG_PRSR, &tmp); + if (retval == ERROR_OK) { + /* clear sticky bits in PRSR, SDR is now 0 */ + retval = mem_ap_read_atomic_u32(armv8->debug_ap, + armv8->debug_base + CPUV8_DBG_PRSR, &tmp); + } return retval; } @@ -1815,6 +1817,8 @@ static int aarch64_write_cpu_memory(struct target *target, dscr = (dscr & ~DSCR_MA); retval = mem_ap_write_atomic_u32(armv8->debug_ap, armv8->debug_base + CPUV8_DBG_DSCR, dscr); + if (retval != ERROR_OK) + return retval; if (arm->core_state == ARM_STATE_AARCH64) { /* Write X0 with value 'address' using write procedure */ @@ -1826,10 +1830,13 @@ static int aarch64_write_cpu_memory(struct target *target, /* Write R0 with value 'address' using write procedure */ /* Step 1.a+b - Write the address for read access into DBGDTRRX */ /* Step 1.c - Copy value from DTR to R0 using instruction mrc DBGDTRTXint, r0 */ - dpm->instr_write_data_dcc(dpm, + retval = dpm->instr_write_data_dcc(dpm, ARMV4_5_MRC(14, 0, 0, 0, 5, 0), address); } + if (retval != ERROR_OK) + return retval; + if (size == 4 && (address % 4) == 0) retval = aarch64_write_cpu_memory_fast(target, count, buffer, &dscr); else @@ -1941,13 +1948,21 @@ static int aarch64_read_cpu_memory_fast(struct target *target, retval = dpm->instr_execute(dpm, ARMV4_5_MCR(14, 0, 0, 0, 5, 0)); } + if (retval != ERROR_OK) + return retval; + /* Step 1.e - Change DCC to memory mode */ *dscr |= DSCR_MA; retval = mem_ap_write_atomic_u32(armv8->debug_ap, armv8->debug_base + CPUV8_DBG_DSCR, *dscr); + if (retval != ERROR_OK) + return retval; + /* Step 1.f - read DBGDTRTX and discard the value */ retval = mem_ap_read_atomic_u32(armv8->debug_ap, armv8->debug_base + CPUV8_DBG_DTRTX, &value); + if (retval != ERROR_OK) + return retval; count--; /* Read the data - Each read of the DTRTX register causes the instruction to be reissued @@ -2011,28 +2026,35 @@ static int aarch64_read_cpu_memory(struct target *target, /* Read DSCR */ retval = mem_ap_read_atomic_u32(armv8->debug_ap, armv8->debug_base + CPUV8_DBG_DSCR, &dscr); + if (retval != ERROR_OK) + return retval; /* This algorithm comes from DDI0487A.g, chapter J9.1 */ /* Set Normal access mode */ dscr &= ~DSCR_MA; - retval += mem_ap_write_atomic_u32(armv8->debug_ap, + retval = mem_ap_write_atomic_u32(armv8->debug_ap, armv8->debug_base + CPUV8_DBG_DSCR, dscr); + if (retval != ERROR_OK) + return retval; if (arm->core_state == ARM_STATE_AARCH64) { /* Write X0 with value 'address' using write procedure */ /* Step 1.a+b - Write the address for read access into DBGDTR_EL0 */ /* Step 1.c - Copy value from DTR to R0 using instruction mrs DBGDTR_EL0, x0 */ - retval += dpm->instr_write_data_dcc_64(dpm, + retval = dpm->instr_write_data_dcc_64(dpm, ARMV8_MRS(SYSTEM_DBG_DBGDTR_EL0, 0), address); } else { /* Write R0 with value 'address' using write procedure */ /* Step 1.a+b - Write the address for read access into DBGDTRRXint */ /* Step 1.c - Copy value from DTR to R0 using instruction mrc DBGDTRTXint, r0 */ - retval += dpm->instr_write_data_dcc(dpm, + retval = dpm->instr_write_data_dcc(dpm, ARMV4_5_MRC(14, 0, 0, 0, 5, 0), address); } + if (retval != ERROR_OK) + return retval; + if (size == 4 && (address % 4) == 0) retval = aarch64_read_cpu_memory_fast(target, count, buffer, &dscr); else |