[MIPS] Implementation of sel_ldr for MIPS architecture.

src/trusted/service_runtime/sel_ldr-inl.h

 /*
  * Copyright (c) 2012 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /*******************************************************************************
  *
  * DO NOT INCLUDE EXCEPT FROM sel_ldr.h
  *
@@ skipping 31 matching lines @@
  * the next two are for syscalls to do address translation, e.g., for
  * system calls; -1 indicates an error, so the syscall can return
  * EINVAL or EFAULT or whatever is appropriate.
  *
  * the latter two interfaces are for use everywhere else in the loader
  * / service runtime and will log a fatal error and abort the process
  * when an error is detected.  (0 is not a good error indicator, since
  * 0 is a valid user address.)
  */
 
+#include "native_client/src/trusted/service_runtime/arch/sel_ldr_arch.h"
+
 static INLINE uintptr_t NaClUserToSysAddrNullOkay(struct NaClApp  *nap,
                                                   uintptr_t       uaddr) {
   if (((uintptr_t) 1U << nap->addr_bits <= uaddr)) {
     return kNaClBadAddress;
   }
   return uaddr + nap->mem_start;
 }
 
 static INLINE uintptr_t NaClUserToSysAddr(struct NaClApp  *nap,
                                           uintptr_t       uaddr) {
@@ skipping 119 matching lines @@
 # else
 #  error "What kind of x86 are we on anyway?!?"
 # endif
 #elif NACL_ARCH(NACL_BUILD_ARCH) == NACL_arm
   UNREFERENCED_PARAMETER(nap);
   addr &= ~NACL_CONTROL_FLOW_MASK;
 # if defined(NACL_TARGET_ARM_THUMB2_MODE)
   addr |= 0xf;
 # endif  /* defined(NACL_TARGET_ARM_THUMB2_MODE) */
   return addr;
+#elif NACL_ARCH(NACL_BUILD_ARCH) == NACL_mips
+  UNREFERENCED_PARAMETER(nap);
+  addr &= NACL_CONTROL_FLOW_MASK;
+  return addr;

[Mark Seaborn, 2012/09/08 02:43:14]

Nit: combine this and just do "return addr & NACL_CONTROL_FLOW_MASK;"

[petarj, 2012/09/11 16:58:13]

Done.

 #else
 # error "What architecture are we on?!?"
 #endif
 }
 
 static INLINE int NaClIsValidJumpTarget(struct NaClApp *nap,
                                         uintptr_t addr) {
   if (0 != (addr & (((uintptr_t) nap->bundle_size) - 1))) {
     return 0;
   }
   return addr < nap->dynamic_text_end;
 }