elf/tst-auditmod21a.c

   1 /* Check LD_AUDIT with static TLS.
   2    Copyright (C) 2022-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <ctype.h>
  20 #include <stdlib.h>
  21 #include <link.h>
  22
  23 #define tls_ie __attribute__ ((tls_model ("initial-exec")))
  24
  25 __thread int tls_var0 tls_ie;
  26 __thread int tls_var1 tls_ie = 0x10;
  27
  28 /* Defined at tst-auditmod21b.so  */
  29 extern __thread int tls_var2;
  30 extern __thread int tls_var3;
  31
  32 static volatile int out;
  33
  34 static void
  35 call_libc (void)
  36 {
  37   /* isspace accesses the initial-exec glibc TLS variables, which are
  38      setup in glibc initialization.  */
  39   out = isspace (' ');
  40 }
  41
  42 unsigned int
  43 la_version (unsigned int v)
  44 {
  45   tls_var0 = 0x1;
  46   if (tls_var1 != 0x10)
  47     abort ();
  48   tls_var1 = 0x20;
  49
  50   tls_var2 = 0x2;
  51   if (tls_var3 != 0x20)
  52     abort ();
  53   tls_var3 = 0x40;
  54
  55   call_libc ();
  56
  57   return LAV_CURRENT;
  58 }
  59
  60 unsigned int
  61 la_objopen (struct link_map* map, Lmid_t lmid, uintptr_t* cookie)
  62 {
  63   call_libc ();
  64   *cookie = (uintptr_t) map;
  65   return 0;
  66 }
  67
  68 void
  69 la_activity (uintptr_t* cookie, unsigned int flag)
  70 {
  71   if (tls_var0 != 0x1 || tls_var1 != 0x20)
  72     abort ();
  73   call_libc ();
  74 }
  75
  76 void
  77 la_preinit (uintptr_t* cookie)
  78 {
  79   call_libc ();
  80 }