fix negative address in some places (#2645)

* fix negative

* fix negative

* fix negative

* fix negative

* fix negative

* fix negative

pwndbg/aglib/disasm/arch.py

@@ -316,6 +316,8 @@ class DisassemblyAssistant:
                 # Don't mask immediates - some computations depend on their signed values
                 if op.type is not CS_OP_IMM:
                     op.before_value &= pwndbg.aglib.arch.ptrmask
+
+                if op.before_value >= 0:
                     op.symbol = MemoryColor.attempt_colorized_symbol(op.before_value)
 
                 op.before_value_resolved = self._resolve_used_value(
@@ -1000,7 +1002,7 @@ class DisassemblyAssistant:
             left, right = instruction.operands
             # If we already used emulation, use the result, otherwise take the source operand before_value
             result = left.after_value or right.before_value
-            if result is not None:
+            if result is not None and result >= 0:
                 TELESCOPE_DEPTH = max(0, int(pwndbg.config.disasm_telescope_depth))
 
                 telescope_addresses = self._telescope(

pwndbg/aglib/symbol.py

@@ -106,6 +106,8 @@ def resolve_addr(addr: int) -> str | None:
     Resolution is performed in the following order:
     - Global scope symbols.
     """
+    assert addr >= 0, "address must be positive"
+
     symbol_name = pwndbg.dbg.selected_inferior().symbol_name_at_address(addr)
     if symbol_name:
         return symbol_name

pwndbg/aglib/vmmap.py

@@ -29,6 +29,8 @@ def find(address: int | pwndbg.dbg_mod.Value | None) -> pwndbg.lib.memory.Page |
         return None
 
     address = int(address)
+    if address < 0:
+        return None
 
     for page in get():
         if address in page:

pwndbg/chain.py

@@ -54,6 +54,7 @@ def get(
     """
     if address is None:
         return None
+    assert address >= 0, "address must be positive"
 
     limit = int(limit)
 
@@ -138,7 +139,7 @@ def format(
     arrow_right = c.arrow(f" {config_arrow_right} ")
 
     # Colorize the chain
-    rest = [M.get_address_and_symbol(link) for link in chain]
+    rest = [M.get_address_and_symbol(addr) if addr >= 0 else "" for addr in chain]
 
     # If the dereference limit is zero, skip any enhancements.
     if limit == 0: