| #!/usr/bin/env python3 |
| # |
| # Copyright (c) 2021 Facebook, Inc. and its affiliates |
| # |
| # SPDX-License-Identifier: Apache-2.0 |
| |
| import binascii |
| import logging |
| import struct |
| |
| from gdbstubs.gdbstub import GdbStub |
| |
| |
| logger = logging.getLogger("gdbstub") |
| |
| |
| class RegNum(): |
| ZERO = 0 |
| RA = 1 |
| SP = 2 |
| GP = 3 |
| TP = 4 |
| T0 = 5 |
| T1 = 6 |
| T2 = 7 |
| FP = 8 |
| S1 = 9 |
| A0 = 10 |
| A1 = 11 |
| A2 = 12 |
| A3 = 13 |
| A4 = 14 |
| A5 = 15 |
| A6 = 16 |
| A7 = 17 |
| S2 = 18 |
| S3 = 19 |
| S4 = 20 |
| S5 = 21 |
| S6 = 22 |
| S7 = 23 |
| S8 = 24 |
| S9 = 25 |
| S10 = 26 |
| S11 = 27 |
| T3 = 28 |
| T4 = 29 |
| T5 = 30 |
| T6 = 31 |
| PC = 32 |
| |
| |
| class GdbStub_RISC_V(GdbStub): |
| ARCH_DATA_BLK_STRUCT = "<IIIIIIIIIIIIIIIIII" |
| |
| GDB_SIGNAL_DEFAULT = 7 |
| |
| GDB_G_PKT_NUM_REGS = 33 |
| |
| def __init__(self, logfile, elffile): |
| super().__init__(logfile=logfile, elffile=elffile) |
| self.registers = None |
| self.gdb_signal = self.GDB_SIGNAL_DEFAULT |
| |
| self.parse_arch_data_block() |
| |
| def parse_arch_data_block(self): |
| arch_data_blk = self.logfile.get_arch_data()['data'] |
| tu = struct.unpack(self.ARCH_DATA_BLK_STRUCT, arch_data_blk) |
| |
| self.registers = dict() |
| |
| self.registers[RegNum.RA] = tu[0] |
| self.registers[RegNum.TP] = tu[1] |
| self.registers[RegNum.T0] = tu[2] |
| self.registers[RegNum.T1] = tu[3] |
| self.registers[RegNum.T2] = tu[4] |
| self.registers[RegNum.A0] = tu[5] |
| self.registers[RegNum.A1] = tu[6] |
| self.registers[RegNum.A2] = tu[7] |
| self.registers[RegNum.A3] = tu[8] |
| self.registers[RegNum.A4] = tu[9] |
| self.registers[RegNum.A5] = tu[10] |
| self.registers[RegNum.A6] = tu[11] |
| self.registers[RegNum.A7] = tu[12] |
| self.registers[RegNum.T3] = tu[13] |
| self.registers[RegNum.T4] = tu[14] |
| self.registers[RegNum.T5] = tu[15] |
| self.registers[RegNum.T6] = tu[16] |
| self.registers[RegNum.PC] = tu[17] |
| |
| def handle_register_group_read_packet(self): |
| reg_fmt = "<I" |
| |
| idx = 0 |
| pkt = b'' |
| |
| while idx < self.GDB_G_PKT_NUM_REGS: |
| if idx in self.registers: |
| bval = struct.pack(reg_fmt, self.registers[idx]) |
| pkt += binascii.hexlify(bval) |
| else: |
| # Register not in coredump -> unknown value |
| # Send in "xxxxxxxx" |
| pkt += b'x' * 8 |
| |
| idx += 1 |
| |
| self.put_gdb_packet(pkt) |
| |
| def handle_register_single_read_packet(self, pkt): |
| # Mark registers as "<unavailable>". 'p' packets are not sent for the registers |
| # currently handled in this file so we can safely reply "xxxxxxxx" here. |
| self.put_gdb_packet(b'x' * 8) |
