1                 : /*
       2                 :  * Copyright 2009 The Native Client Authors. All rights reserved.
       3                 :  * Use of this source code is governed by a BSD-style license that can be
       4                 :  * found in the LICENSE file.
       5                 :  */
       6                 : 
       7                 : /*
       8                 :  * NaCl Simple/secure ELF loader (NaCl SEL) misc utilities.  Inlined
       9                 :  * functions.  Internal; do not include.
      10                 :  */
      11                 : #ifndef NATIVE_CLIENT_SRC_TRUSTED_SERVICE_RUNTIME_SEL_UTIL_INL_H_
      12                 : #define NATIVE_CLIENT_SRC_TRUSTED_SERVICE_RUNTIME_SEL_UTIL_INL_H_ 1
      13                 : 
      14                 : /*
      15                 :  * NaClRoundPage is a bit of a misnomer -- it always rounds up to a
      16                 :  * page size, not the nearest.
      17                 :  */
      18               3 : static INLINE size_t  NaClRoundPage(size_t    nbytes) {
      19               3 :   return (nbytes + NACL_PAGESIZE - 1) & ~((size_t) NACL_PAGESIZE - 1);
      20               3 : }
      21                 : 
      22                 : static INLINE uint32_t  NaClRoundPage32(uint32_t    nbytes) {
      23                 :   return (nbytes + NACL_PAGESIZE - 1) & ~((size_t) NACL_PAGESIZE - 1);
      24                 : }
      25                 : 
      26               1 : static INLINE size_t  NaClRoundAllocPage(size_t    nbytes) {
      27               1 :   return (nbytes + NACL_MAP_PAGESIZE - 1) & ~((size_t) NACL_MAP_PAGESIZE - 1);
      28               1 : }
      29                 : 
      30                 : static INLINE uint32_t  NaClRoundAllocPage32(uint32_t    nbytes) {
      31                 :   return (nbytes + NACL_MAP_PAGESIZE - 1) & ~((uint32_t)NACL_MAP_PAGESIZE - 1);
      32                 : }
      33                 : 
      34                 : static INLINE size_t NaClTruncPage(size_t  nbytes) {
      35                 :   return nbytes & ~((size_t) NACL_PAGESIZE - 1);
      36                 : }
      37                 : 
      38                 : static INLINE size_t NaClTruncAllocPage(size_t  nbytes) {
      39                 :   return nbytes & ~((size_t) NACL_MAP_PAGESIZE - 1);
      40                 : }
      41                 : 
      42                 : static INLINE size_t  NaClBytesToPages(size_t nbytes) {
      43                 :   return (nbytes + NACL_PAGESIZE - 1) >> NACL_PAGESHIFT;
      44                 : }
      45                 : 
      46               0 : static INLINE int /* bool */ NaClIsPageMultiple(uintptr_t addr_or_size) {
      47               0 :   return 0 == ((NACL_PAGESIZE - 1) & addr_or_size);
      48               0 : }
      49                 : 
      50                 : static INLINE int /* bool */ NaClIsAllocPageMultiple(uintptr_t addr_or_size) {
      51                 :   return 0 == ((NACL_MAP_PAGESIZE - 1) & addr_or_size);
      52                 : }
      53                 : 
      54                 : /*
      55                 :  * True host-OS allocation unit.
      56                 :  */
      57                 : static INLINE size_t NaClRoundHostAllocPage(size_t  nbytes) {
      58                 : #if NACL_WINDOWS
      59                 :   return NaClRoundAllocPage(nbytes);
      60                 : #else   /* NACL_WINDOWS */
      61                 :   return NaClRoundPage(nbytes);
      62                 : #endif  /* !NACL_WINDOWS */
      63                 : }
      64                 : 
      65                 : static INLINE size_t NaClRoundPageNumUpToMapMultiple(size_t npages) {
      66                 :   return (npages + NACL_PAGES_PER_MAP - 1) & ~((size_t) NACL_PAGES_PER_MAP - 1);
      67                 : }
      68                 : 
      69                 : static INLINE size_t NaClTruncPageNumDownToMapMultiple(size_t npages) {
      70                 :   return npages & ~((size_t) NACL_PAGES_PER_MAP - 1);
      71                 : }
      72                 : 
      73                 : #endif  /* NATIVE_CLIENT_SRC_TRUSTED_SERVICE_RUNTIME_SEL_UTIL_INL_H_ */