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#!/usr/bin/env python3
import sys, re, subprocess
trace_filename = sys.argv[1]
elf_filename = sys.argv[2]
insns = dict()
with subprocess.Popen(["riscv32-unknown-elf-objdump", "-d", elf_filename], stdout=subprocess.PIPE) as proc:
while True:
line = proc.stdout.readline().decode("ascii")
if line == '': break
match = re.match(r'^\s*([0-9a-f]+):\s+([0-9a-f]+)\s*(.*)', line)
if match: insns[int(match.group(1), 16)] = (int(match.group(2), 16), match.group(3).replace("\t", " "))
with open(trace_filename, "r") as f:
pc = -1
last_irq = False
for line in f:
raw_data = int(line.replace("x", "0"), 16)
payload = raw_data & 0xffffffff
irq_active = (raw_data & 0x800000000) != 0
is_addr = (raw_data & 0x200000000) != 0
is_branch = (raw_data & 0x100000000) != 0
info = "%s %s%08x" % ("IRQ" if irq_active or last_irq else " ",
">" if is_branch else "@" if is_addr else "=", payload)
if irq_active and not last_irq:
pc = 0x10
if pc >= 0:
if pc in insns:
insn_opcode, insn_desc = insns[pc]
opname = insn_desc.split()[0]
if insn_opcode == 0x0400000b:
insn_desc = "retirq"
opname = "retirq"
if is_branch and opname not in ["j", "jal", "jr", "jalr", "ret", "retirq",
"beq", "bne", "blt", "ble", "bge", "bgt", "bltu", "bleu", "bgeu", "bgtu",
"beqz", "bnez", "blez", "bgez", "bltz", "bgtz"]:
print("%s ** UNEXPECTED BRANCH DATA FOR INSN AT %08x! **" % (info, pc))
if is_addr and opname not in ["lb", "lh", "lw", "lbu", "lhu", "sb", "sh", "sw"]:
print("%s ** UNEXPECTED ADDR DATA FOR INSN AT %08x! **" % (info, pc))
opcode_fmt = "%08x" if (insn_opcode & 3) == 3 else " %04x"
print(("%s | %08x | " + opcode_fmt + " | %s") % (info, pc, insn_opcode, insn_desc))
if not is_addr:
pc += 4 if (insn_opcode & 3) == 3 else 2
else:
print("%s ** NO INFORMATION ON INSN AT %08x! **" % (info, pc))
pc = -1
else:
if is_branch:
print("%s ** FOUND BRANCH AND STARTING DECODING **" % info)
else:
print("%s ** SKIPPING DATA UNTIL NEXT BRANCH **" % info)
if is_branch:
pc = payload
last_irq = irq_active
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