mirror of https://github.com/YosysHQ/picorv32.git
65 lines
2.4 KiB
Python
65 lines
2.4 KiB
Python
#!/usr/bin/env python3
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import sys, re, subprocess
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trace_filename = sys.argv[1]
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elf_filename = sys.argv[2]
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insns = dict()
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with subprocess.Popen(["riscv32-unknown-elf-objdump", "-d", elf_filename], stdout=subprocess.PIPE) as proc:
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while True:
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line = proc.stdout.readline().decode("ascii")
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if line == '': break
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match = re.match(r'^\s*([0-9a-f]+):\s+([0-9a-f]+)\s*(.*)', line)
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if match: insns[int(match.group(1), 16)] = (int(match.group(2), 16), match.group(3).replace("\t", " "))
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with open(trace_filename, "r") as f:
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pc = -1
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last_irq = False
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for line in f:
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raw_data = int(line.replace("x", "0"), 16)
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payload = raw_data & 0xffffffff
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irq_active = (raw_data & 0x800000000) != 0
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is_addr = (raw_data & 0x200000000) != 0
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is_branch = (raw_data & 0x100000000) != 0
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info = "%s %s%08x" % ("IRQ" if irq_active else " ", ">" if is_branch else "@" if is_addr else "=", payload)
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if irq_active and not last_irq:
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pc = 0x10
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if pc >= 0:
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if pc in insns:
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insn_opcode, insn_desc = insns[pc]
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opname = insn_desc.split()[0]
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if insn_desc.startswith("custom0 0,0,0,2"):
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opname = "retirq"
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if is_branch and opname not in ["j", "jal", "jr", "jalr", "ret", "retirq",
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"beq", "bne", "blt", "ble", "bge", "bgt", "bltu", "bleu", "bgeu", "bgtu",
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"beqz", "bnez", "blez", "bgez", "bltz", "bgtz"]:
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print("%s ** UNEXPECTED BRANCH DATA FOR INSN AT %08x! **" % (info, pc))
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if is_addr and opname not in ["lb", "lh", "lw", "lbu", "lhu", "sb", "sh", "sw"]:
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print("%s ** UNEXPECTED ADDR DATA FOR INSN AT %08x! **" % (info, pc))
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opcode_fmt = "%08x" if (insn_opcode & 3) == 3 else " %04x"
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print(("%s | %08x | " + opcode_fmt + " | %s") % (info, pc, insn_opcode, insn_desc))
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if not is_addr:
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pc += 4 if (insn_opcode & 3) == 3 else 2
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else:
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print("%s ** NO INFORMATION ON INSN AT %08x! **" % (info, pc))
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pc = -1
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else:
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if is_branch:
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print("%s ** FOUND BRANCH AND STARTING DECODING **" % info)
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else:
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print("%s ** SKIPPING DATA UNTIL NEXT BRANCH **" % info)
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if is_branch:
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pc = payload
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last_irq = irq_active
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