In 32bit mode, removed all assembly addressing modes that are incompatible with

sigaction.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "debug.h"
 #include "sandbox_impl.h"
 
 namespace playground {
 
 #if defined(__NR_sigaction)
@@ skipping 80 matching lines @@
 }
 #endif
 
 #if defined(__NR_signal)
 void* Sandbox::sandbox_signal(int signum, const void* handler) {
   struct kernel_old_sigaction sa, osa;
   sa.sa_handler_ = (void (*)(int))(handler);
   sa.sa_flags    = SA_NODEFER | SA_RESETHAND | SA_RESTORER;
   sa.sa_mask     = 0;
   asm volatile(
-      "lea  0f, %0\n"
-      "jmp  1f\n"
+      "call 1f\n"
     "0:pop  %%eax\n"
       "mov  $119, %%eax\n" // __NR_sigreturn
       "int  $0x80\n"
-    "1:\n"
+    "1:pop  %0\n"
       : "=r"(sa.sa_restorer));
   long rc = sandbox_sigaction(signum, &sa, &osa);
   if (rc < 0) {
     return (void *)rc;
   }
   return reinterpret_cast<void *>(osa.sa_handler_);
 }
 #endif
 
 bool Sandbox::process_sigaction(const SyscallRequestInfo* info) {
@@ skipping 24 matching lines @@
   }
   SecureMem::sendSystemCall(*info, SecureMem::SEND_UNLOCKED,
       sigaction_req.signum,
       const_cast<SysCalls::kernel_sigaction*>(sigaction_req.action),
       const_cast<SysCalls::kernel_sigaction*>(sigaction_req.old_action),
       sigaction_req.sigsetsize);
   return true;
 }
 
 } // namespace