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#!/usr/bin/env python3
"""
Trace all subsystems: WPR, Migration, Primary Dispatcher sub-commands
"""
import struct
FWIMAGE_PATH = "$OPEN_IOV_ROOT/firmware/570-GSP/gsp-570.144.fwimage.bin"
BASE_ADDR = 0x04000000
def read_binary(path):
with open(path, 'rb') as f:
return f.read()
def decode_inst(data, offset):
if offset + 4 > len(data): return None, 0
first16 = struct.unpack('<H', data[offset:offset+2])[0]
if (first16 & 0x3) != 0x3:
return decode_compressed(first16), 2
inst = struct.unpack('<I', data[offset:offset+4])[0]
return decode_32bit(inst), 4
def decode_compressed(inst):
if (inst & 0xF003) == 0x8002:
rd = (inst >> 7) & 0x7; rs2 = (inst >> 10) & 0x7
return {'m': 'c.mv', 'rd': rd+8, 'rs2': rs2+8}
if (inst & 0xE003) == 0x6001:
rd = (inst >> 7) & 0x7
imm = ((inst >> 2) & 0x3F) | ((inst >> 12) & 0x1) << 6
if imm & 0x40: imm -= 0x80
return {'m': 'c.addi', 'rd': rd+8, 'imm': imm}
if (inst & 0xF07F) == 0x8067:
rs1 = (inst >> 7) & 0x1F
return {'m': 'c.jalr', 'rs1': rs1}
if (inst & 0xE003) == 0x6003:
rd = (inst >> 10) & 0x7; rs1 = (inst >> 7) & 0x7
off = ((inst >> 2) & 0x1F) | ((inst >> 13) & 0x3) << 5
return {'m': 'c.ld', 'rd': rd+8, 'rs1': rs1+8, 'off': off*8}
if (inst & 0xE003) == 0xE000:
rs1 = (inst >> 7) & 0x7; rs2 = (inst >> 10) & 0x7
off = ((inst >> 2) & 0x1F) | ((inst >> 13) & 0x3) << 5
return {'m': 'c.sd', 'rs1': rs1+8, 'rs2': rs2+8, 'off': off*8}
return {'m': 'c.unk', 'raw': inst}
def decode_32bit(inst):
opcode = inst & 0x7F
funct3 = (inst >> 12) & 0x7
rd = (inst >> 7) & 0x1F
rs1 = (inst >> 15) & 0x1F
rs2 = (inst >> 20) & 0x1F
funct7 = (inst >> 25) & 0x7F
if opcode == 0x13 and funct3 == 0:
imm = (inst >> 20) & 0xFFF
if imm >= 0x800: imm -= 0x1000
return {'m': 'addi', 'rd': rd, 'rs1': rs1, 'imm': imm}
if opcode == 0x03 and funct3 == 3:
off = (inst >> 20) & 0xFFF
if off >= 0x800: off -= 0x1000
return {'m': 'ld', 'rd': rd, 'rs1': rs1, 'off': off}
if opcode == 0x23 and funct3 == 3:
off = ((inst >> 7) & 0x1F) | ((inst >> 25) & 0x7F) << 5
return {'m': 'sd', 'rs1': rs1, 'rs2': rs2, 'off': off}
if opcode == 0x6F:
imm = ((inst >> 31) & 0x1) << 20 | ((inst >> 12) & 0xFF) << 12 | ((inst >> 20) & 0x1) << 11 | ((inst >> 21) & 0x3FF) << 1
if imm & 0x100000: imm -= 0x200000
return {'m': 'jal', 'rd': rd, 'imm': imm}
if opcode == 0x67 and funct3 == 0:
imm = (inst >> 20) & 0xFFF
if imm >= 0x800: imm -= 0x1000
return {'m': 'jalr', 'rd': rd, 'rs1': rs1, 'imm': imm}
if opcode == 0x63:
imm = ((inst >> 31) & 0x1) << 12 | ((inst >> 7) & 0x1) << 11 | ((inst >> 25) & 0x3F) << 5 | ((inst >> 8) & 0xF) << 1
if imm & 0x1000: imm -= 0x2000
btype = ['beq','bne','?','?','blt','bge','bltu','bgeu'][funct3]
return {'m': btype, 'rs1': rs1, 'rs2': rs2, 'imm': imm}
if opcode == 0x37:
imm = (inst >> 12) & 0xFFFFF
return {'m': 'lui', 'rd': rd, 'imm': imm}
if opcode == 0x17:
imm = (inst >> 12) & 0xFFFFF
return {'m': 'auipc', 'rd': rd, 'imm': imm}
if opcode == 0x33:
ops = {0:'add', 0x20:'sub', 1:'sll', 4:'xor', 5:'srl', 0x25:'sra', 6:'or', 7:'and'}
return {'m': ops.get(funct7, f'arith{funct7}'), 'rd': rd, 'rs1': rs1, 'rs2': rs2}
return {'m': 'unk', 'raw': inst}
def trace_function(data, start_addr, max_bytes=2000):
offset = start_addr - BASE_ADDR
insts = []
i = 0
while i < max_bytes:
idx = offset + i
if idx >= len(data): break
inst, size = decode_inst(data, idx)
if inst is None: i += 2; continue
inst['addr'] = BASE_ADDR + idx
inst['rel'] = i
insts.append(inst)
i += size
if inst.get('m') in ('ret', 'jalr') and inst.get('rd') == 0 and inst.get('imm', 0) == 0 and inst.get('rs1', 1) == 1:
break
return insts
def find_string_refs(data, strings):
"""Find all references to given strings in the binary"""
results = {}
for s in strings:
s_bytes = s.encode('ascii')
results[s] = []
# Search for string in data
for i in range(len(data) - len(s_bytes)):
if data[i:i+len(s_bytes)] == s_bytes:
results[s].append(BASE_ADDR + i)
return results
def find_string_refs_via_loads(data, string_addrs):
"""Find code that loads addresses of strings"""
results = {}
for s, addrs in string_addrs.items():
results[s] = []
for str_addr in addrs:
# Look for auipc/addi pairs that compute this address
for i in range(0, len(data) - 4, 2):
if i + 4 <= len(data):
inst = struct.unpack('<I', data[i:i+4])[0]
opcode = inst & 0x7F
if opcode == 0x17: # auipc
rd = (inst >> 7) & 0x1F
imm = (inst >> 12) & 0xFFFFF
pc = BASE_ADDR + i
base = (pc + (imm << 12)) & ~0xFFF
# Check next instruction for addi
if i + 8 <= len(data):
inst2 = struct.unpack('<I', data[i+4:i+8])[0]
if (inst2 & 0x7F) == 0x13 and ((inst2 >> 12) & 0x7) == 0:
rd2 = (inst2 >> 7) & 0x1F
rs1 = (inst2 >> 15) & 0x1F
imm2 = (inst2 >> 20) & 0xFFF
if imm2 >= 0x800: imm2 -= 0x1000
if rd == rd2 and rs1 == rd:
computed = base + imm2
if computed == str_addr:
results[s].append(BASE_ADDR + i)
return results
data = read_binary(FWIMAGE_PATH)
# ============================================================
# 1. TRACE WPR SUBSYSTEM
# ============================================================
print("=" * 60)
print("1. WPR SUBSYSTEM - String References")
print("=" * 60)
wpr_strings = [
"WPR_WRITE_COMPLETE", "WPR_READ_COMPLETE",
"WPR_WRITE_TIMEOUT", "WPR_READ_TIMEOUT",
"NV_WPR_WRITE_COMPLETE", "NV_WPR_READ_COMPLETE",
"NV_WPR_WRITE_TIMEOUT", "NV_WPR_READ_TIMEOUT"
]
wpr_locs = find_string_refs(data, wpr_strings)
for s, addrs in wpr_locs.items():
if addrs:
print(f"\n{s}:")
for addr in addrs:
print(f" String at 0x{addr:08x}")
# Find code referencing these strings
wpr_refs = find_string_refs_via_loads(data, wpr_locs)
for s, addrs in wpr_refs.items():
if addrs:
print(f"\nCode referencing {s}:")
for addr in addrs[:5]:
print(f" 0x{addr:08x}")
# ============================================================
# 2. TRACE BAR SUBSYSTEM
# ============================================================
print("\n" + "=" * 60)
print("2. BAR SUBSYSTEM - String References")
print("=" * 60)
bar_strings = ["BAR1", "Bar1Rest", "ForceBarAccess", "Bar1Mapping", "Bar1Aperture", "Bar1Size"]
bar_locs = find_string_refs(data, bar_strings)
for s, addrs in bar_locs.items():
if addrs:
print(f"\n{s}:")
for addr in addrs:
print(f" String at 0x{addr:08x}")
bar_refs = find_string_refs_via_loads(data, bar_locs)
for s, addrs in bar_refs.items():
if addrs:
print(f"\nCode referencing {s}:")
for addr in addrs[:5]:
print(f" 0x{addr:08x}")
# ============================================================
# 3. DECODE PRIMARY DISPATCHER SUB-COMMANDS (Jump Table at 0x057a3ad8)
# ============================================================
print("\n" + "=" * 60)
print("3. PRIMARY DISPATCHER SUB-COMMANDS (0x057a3ad8)")
print("=" * 60)
def decode_jal_target(inst, pc):
imm = ((inst >> 31) & 0x1) << 20 | ((inst >> 12) & 0xFF) << 12 | ((inst >> 20) & 0x1) << 11 | ((inst >> 21) & 0x3FF) << 1
if imm & 0x100000: imm -= 0x200000
return pc + imm
jt_base = 0x057a3ad8
for i in range(32):
entry_addr = jt_base + i * 8
offset = entry_addr - BASE_ADDR
if offset + 8 <= len(data):
addi_inst = struct.unpack('<I', data[offset:offset+4])[0]
jal_inst = struct.unpack('<I', data[offset+4:offset+8])[0]
target = decode_jal_target(jal_inst, entry_addr + 8)
print(f" Subcmd {i:2d}: 0x{entry_addr:08x} -> jal 0x{target:08x}")
# ============================================================
# 4. TRACE MIGRATION (RPC 0x0B) IN DISPATCHERS
# ============================================================
print("\n" + "=" * 60)
print("4. MIGRATION (RPC 0x0B) HANDLERS")
print("=" * 60)
# Primary dispatcher - look for RPC 0x0B branches
print("\nPrimary Dispatcher (0x057a1ac0) MIGRATE branches:")
offset = 0x57a1ac0 - BASE_ADDR
for i in range(0, 3000, 2):
idx = offset + i
if idx + 4 <= len(data):
inst = struct.unpack('<I', data[idx:idx+4])[0]
opcode = inst & 0x7F
if opcode == 0x63: # branch
funct3 = (inst >> 12) & 0x7
rs1 = (inst >> 15) & 0x1F
rs2 = (inst >> 20) & 0x1F
imm = ((inst >> 31) & 0x1) << 12 | ((inst >> 7) & 0x1) << 11 | ((inst >> 25) & 0x3F) << 5 | ((inst >> 8) & 0xF) << 1
if imm & 0x1000: imm -= 0x2000
target = BASE_ADDR + idx + imm
# Check for nearby addi with imm=11 (MIGRATE)
for back in range(2, 20, 2):
if idx - back >= 0:
prev = struct.unpack('<I', data[idx-back:idx-back+4])[0]
if (prev & 0x7F) == 0x13 and ((prev >> 12) & 0x7) == 0:
prev_imm = (prev >> 20) & 0xFFF
if prev_imm >= 0x800: prev_imm -= 0x1000
if prev_imm == 11:
btype = ['beq','bne','?','?','blt','bge','bltu','bgeu'][funct3]
print(f" 0x{BASE_ADDR+idx:08x}: {btype} x{rs1}, x{rs2}, 0x{target:08x} (RPC=0x0B)")
# Secondary dispatcher
print("\nSecondary Dispatcher (0x04ed39dc) MIGRATE branches:")
offset = 0xed39dc
for i in range(0, 5000, 2):
idx = offset + i
if idx + 4 <= len(data):
inst = struct.unpack('<I', data[idx:idx+4])[0]
opcode = inst & 0x7F
if opcode == 0x63:
funct3 = (inst >> 12) & 0x7
rs1 = (inst >> 15) & 0x1F
rs2 = (inst >> 20) & 0x1F
imm = ((inst >> 31) & 0x1) << 12 | ((inst >> 7) & 0x1) << 11 | ((inst >> 25) & 0x3F) << 5 | ((inst >> 8) & 0xF) << 1
if imm & 0x1000: imm -= 0x2000
target = BASE_ADDR + idx + imm
for back in range(2, 20, 2):
if idx - back >= 0:
prev = struct.unpack('<I', data[idx-back:idx-back+4])[0]
if (prev & 0x7F) == 0x13 and ((prev >> 12) & 0x7) == 0:
prev_imm = (prev >> 20) & 0xFFF
if prev_imm >= 0x800: prev_imm -= 0x1000
if prev_imm == 11:
btype = ['beq','bne','?','?','blt','bge','bltu','bgeu'][funct3]
print(f" 0x{BASE_ADDR+idx:08x}: {btype} x{rs1}, x{rs2}, 0x{target:08x} (RPC=0x0B)")
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