granicus.if.org Git - strace/blob - fetch_struct_stat.c

   1 /*
   2  * Copyright (c) 2014-2016 Dmitry V. Levin <ldv@altlinux.org>
   3  * Copyright (c) 2016-2018 The strace developers.
   4  * All rights reserved.
   5  *
   6  * SPDX-License-Identifier: LGPL-2.1-or-later
   7  */
   8
   9 #include "defs.h"
  10
  11 #include DEF_MPERS_TYPE(struct_stat)
  12
  13 #include "asm_stat.h"
  14
  15 #if defined MPERS_IS_m32
  16 # undef HAVE_STRUCT_STAT
  17 # undef HAVE_STRUCT_STAT_ST_MTIME_NSEC
  18 # ifdef HAVE_M32_STRUCT_STAT
  19 #  define HAVE_STRUCT_STAT 1
  20 #  ifdef HAVE_M32_STRUCT_STAT_ST_MTIME_NSEC
  21 #   define HAVE_STRUCT_STAT_ST_MTIME_NSEC 1
  22 #  endif /* HAVE_M32_STRUCT_STAT_ST_MTIME_NSEC */
  23 # endif /* HAVE_M32_STRUCT_STAT */
  24 #elif defined MPERS_IS_mx32
  25 # undef HAVE_STRUCT_STAT
  26 # undef HAVE_STRUCT_STAT_ST_MTIME_NSEC
  27 # ifdef HAVE_MX32_STRUCT_STAT
  28 #  define HAVE_STRUCT_STAT 1
  29 #  ifdef HAVE_MX32_STRUCT_STAT_ST_MTIME_NSEC
  30 #   define HAVE_STRUCT_STAT_ST_MTIME_NSEC 1
  31 #  endif /* HAVE_MX32_STRUCT_STAT_ST_MTIME_NSEC */
  32 # endif /* HAVE_MX32_STRUCT_STAT */
  33 #else /* !MPERS_IS_m32 && !MPERS_IS_mx32 */
  34 # define HAVE_STRUCT_STAT 1
  35 #endif
  36
  37 #ifndef HAVE_STRUCT_STAT
  38 struct stat {};
  39 #endif
  40
  41 typedef struct stat struct_stat;
  42
  43 #include MPERS_DEFS
  44
  45 #include "stat.h"
  46
  47 #ifdef HAVE_STRUCT_STAT_ST_MTIME_NSEC
  48 # define TIME_NSEC(arg) zero_extend_signed_to_ull(arg)
  49 # define HAVE_NSEC true
  50 #else
  51 # define TIME_NSEC(arg) 0
  52 # define HAVE_NSEC false
  53 #endif
  54
  55 MPERS_PRINTER_DECL(bool, fetch_struct_stat,
  56                    struct tcb *const tcp, const kernel_ulong_t addr,
  57                    struct strace_stat *const dst)
  58 {
  59 #ifdef HAVE_STRUCT_STAT
  60         struct_stat buf;
  61         if (umove_or_printaddr(tcp, addr, &buf))
  62                 return false;
  63
  64         dst->dev = zero_extend_signed_to_ull(buf.st_dev);
  65         dst->ino = zero_extend_signed_to_ull(buf.st_ino);
  66         dst->rdev = zero_extend_signed_to_ull(buf.st_rdev);
  67         dst->size = zero_extend_signed_to_ull(buf.st_size);
  68         dst->blocks = zero_extend_signed_to_ull(buf.st_blocks);
  69         dst->blksize = zero_extend_signed_to_ull(buf.st_blksize);
  70         dst->mode = zero_extend_signed_to_ull(buf.st_mode);
  71         dst->nlink = zero_extend_signed_to_ull(buf.st_nlink);
  72         dst->uid = zero_extend_signed_to_ull(buf.st_uid);
  73         dst->gid = zero_extend_signed_to_ull(buf.st_gid);
  74         dst->atime = sign_extend_unsigned_to_ll(buf.st_atime);
  75         dst->ctime = sign_extend_unsigned_to_ll(buf.st_ctime);
  76         dst->mtime = sign_extend_unsigned_to_ll(buf.st_mtime);
  77         dst->atime_nsec = TIME_NSEC(buf.st_atime_nsec);
  78         dst->ctime_nsec = TIME_NSEC(buf.st_ctime_nsec);
  79         dst->mtime_nsec = TIME_NSEC(buf.st_mtime_nsec);
  80         dst->has_nsec = HAVE_NSEC;
  81         return true;
  82 #else /* !HAVE_STRUCT_STAT */
  83         printaddr(addr);
  84         return false;
  85 #endif
  86 }