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Diffstat (limited to 'cortex-a.py')
| -rw-r--r-- | cortex-a.py | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/cortex-a.py b/cortex-a.py new file mode 100644 index 000000000..9de16bae9 --- /dev/null +++ b/cortex-a.py @@ -0,0 +1,157 @@ +class Armv8AException(gdb.Command): + def __init__ (self): + super (Armv8AException, self).__init__ ("armv8a-exception", gdb.COMMAND_USER) + + def print_data_abort(self, frame, iss): + isv = (iss >> 23) & 0x1 + sas = (iss >> 21) & 0x3 + sse = (iss >> 20) & 0x1 + srt = (iss >> 15) & 0x1f + sf = (iss >> 14) & 0x1 + ar = (iss >> 13) & 0x1 + vncr = (iss >> 12) & 0x1 + _set = (iss >> 10) & 0x3 + fnv = (iss >> 9) & 0x1 + ea = (iss >> 8) & 0x1 + cm = (iss >> 7) & 0x1 + s1ptw = (iss >> 6) & 0x1 + wnr = (iss >> 5) & 0x1 + dfsc = iss & 0x1f + if isv: + # print("isv valid", sas, sse, srt, sf, ar) + access_sizes = ("Byte", "Halfword", "Word", "Doubleword") + print("Access size:", access_sizes[sas]) + print("Sign extended:", "Yes" if sse else "No") + print("Register:", hex(srt), "64-bit" if sf else "32-bit") + print("Acquire/Release:", "Yes" if ar else "No") + if dfsc == 0b010000: + print("Not on translation table walk") + if not fnv: + value = int(frame.read_register("FAR_EL2")) + print("FAR", hex(value)) + elif dfsc == 0b000101: + print("translation fault level 1") + elif dfsc == 0b010001: + print("tag check fault") + elif dfsc == 0b100001: + print("alignment fault") + else: + print(bin(dfsc)) + print(vncr, _set, fnv, ea, cm, s1ptw, wnr, dfsc) + + def print_instruction_abort(self, frame, iss): + _set = (iss >> 10) & 0x3 + fnv = (iss >> 9) & 0x1 + ea = (iss >> 8) & 0x1 + s1ptw = (iss >> 6) & 0x1 + ifsc = iss & 0x1f + if ifsc == 0b010000: + print("Not on translation table walk") + if not fnv: + value = int(frame.read_register("FAR_EL2")) + print("FAR", hex(value)) + elif ifsc == 0b00101: + print("translation fault level 1") + elif ifsc == 0b01001: + print("access flag fault level 1") + # elif dfsc == 0b100001: + # print("alignment fault") + else: + print(bin(ifsc)) + + def invoke (self, arg, from_tty): + frame = gdb.selected_frame() + value = int(frame.read_register("ESR_EL2")) + if value == 0: + return None + iss2 = (value >> 32) & 0x1ff + ec = (value >> 26) & 0x3ff + il = (value >> 25) & 0x1 + iss = value & 0xffffff + if ec == 0b000000: + print("Unknown fault") + elif ec == 0b000001: + print("Trapped WF*") + elif ec == 0b000011: + print("Trapped MCR or MRC") + elif ec == 0b000100: + print("Trapped MCRR or MRRC") + elif ec == 0b000101: + print("Trapped MCR or MRC") + elif ec == 0b000110: + print("Trapped LDC or STC") + elif ec == 0b000111: + print("Trapped SIMD") + elif ec == 0b001000: + print("Trapped VMRS") + elif ec == 0b001001: + print("Trapped pointer authentication") + elif ec == 0b001010: + print("Trapped LD64B or ST64B*") + elif ec == 0b001100: + print("Trapped MRRC") + elif ec == 0b001101: + print("Branch target exception") + elif ec == 0b001110: + print("Illegal execution state") + elif ec == 0b010001: + print("SVC instruction") + elif ec == 0b010010: + print("HVC instruction") + elif ec == 0b010011: + print("SMC instruction") + elif ec == 0b010101: + print("SVC instruction") + elif ec == 0b010110: + print("HVC instruction") + elif ec == 0b010111: + print("SMC instruction") + elif ec == 0b011000: + print("Trapped MRS, MRS or system instruction") + elif ec == 0b011001: + print("Trapped SVE") + elif ec == 0b011010: + print("Trapped ERET") + elif ec == 0b011100: + print("Failed pointer authentication") + elif ec == 0b100000: + print("Instruction abort from lower level") + elif ec == 0b100001: + print("Instruction abort from same level") + self.print_instruction_abort(frame, iss) + elif ec == 0b100010: + print("PC alignment failure") + elif ec == 0b100100: + print("Data abort from lower level") + elif ec == 0b100101: + print("Data abort from same level") + self.print_data_abort(frame, iss) + elif ec == 0b100110: + print("SP alignment fault") + elif ec == 0b101000: + print("32-bit floating point exception") + elif ec == 0b101100: + print("64-bit floating point exception") + elif ec == 0b101111: + print("SError interrupt") + elif ec == 0b110000: + print("Breakpoint from lower level") + elif ec == 0b110001: + print("Breakpoint from same level") + elif ec == 0b110010: + print("Software step from lower level") + elif ec == 0b110011: + print("Software step from same level") + elif ec == 0b110100: + print ("Watch point from same level") + elif ec == 0b110101: + print("Watch point from lower level") + elif ec == 0b111000: + print("Breakpoint in aarch32 mode") + elif ec == 0b111010: + print("Vector catch in aarch32") + elif ec == 0b111100: + print("Brk instruction in aarch64") + print(hex(int(value)), iss2, bin(ec), il, iss) + +Armv8AException() |