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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+(\S+)\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
if irq_active and not last_irq:
pc = 0x10
if pc >= 0:
if pc in insns:
insn_opcode, insn_desc = insns[pc]
opcode_fmt = "%08x" if (insn_opcode & 3) == 3 else " %04x"
print(("%s %s%08x | %08x | " + opcode_fmt + " | %s") % ("IRQ" if irq_active else " ",
">" if is_branch else "@" if is_addr else "=", payload, pc, insn_opcode, insn_desc))
if not is_addr:
pc += 4 if (insn_opcode & 3) == 3 else 2
else:
print("%s %s%08x ** NO INFORMATION ON INSN AT %08x! **" % ("IRQ" if irq_active else " ",
">" if is_branch else "@" if is_addr else "=", payload, pc))
pc = -1
else:
print("%s %s%08x ** SKIPPING DATA UNTIL NEXT BRANCH **" % ("IRQ" if irq_active else " ",
">" if is_branch else "@" if is_addr else "=", payload))
if is_branch:
pc = payload
last_irq = irq_active
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