1  /* Audit modules for tst-audit25a.
       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 <link.h>
      20  #include <inttypes.h>
      21  #include <stdlib.h>
      22  #include <string.h>
      23  #include <stdio.h>
      24  
      25  #define AUDIT25_COOKIE     0x1
      26  #define AUDIT25MOD1_COOKIE 0x2
      27  #define AUDIT25MOD2_COOKIE 0x3
      28  #define AUDIT25MOD3_COOKIE 0x2
      29  #define AUDIT25MOD4_COOKIE 0x3
      30  
      31  #define TEST_NAME "tst-audit25"
      32  #define TEST_MOD  "tst-audit25"
      33  #define TEST_FUNC "tst_audit25"
      34  
      35  unsigned int
      36  la_version (unsigned int version)
      37  {
      38    return LAV_CURRENT;
      39  }
      40  
      41  unsigned int
      42  la_objopen (struct link_map *map, Lmid_t lmid, uintptr_t *cookie)
      43  {
      44    const char *p = strrchr (map->l_name, '/');
      45    const char *l_name = p == NULL ? TEST_NAME : p + 1;
      46  
      47    uintptr_t ck = -1;
      48    if (strcmp (l_name, TEST_MOD "mod1.so") == 0)
      49      ck = AUDIT25MOD1_COOKIE;
      50    else if (strcmp (l_name, TEST_MOD "mod2.so") == 0)
      51      ck = AUDIT25MOD2_COOKIE;
      52    else if (strcmp (l_name, TEST_MOD "mod3.so") == 0)
      53      ck = AUDIT25MOD3_COOKIE;
      54    else if (strcmp (l_name, TEST_MOD "mod4.so") == 0)
      55      ck = AUDIT25MOD4_COOKIE;
      56    else if (strncmp (l_name, TEST_NAME, strlen (TEST_NAME)) == 0)
      57      ck = AUDIT25_COOKIE;
      58  
      59    *cookie = ck;
      60    return ck == -1 ? 0 : LA_FLG_BINDFROM | LA_FLG_BINDTO;
      61  }
      62  
      63  #if __ELF_NATIVE_CLASS == 64
      64  uintptr_t
      65  la_symbind64 (Elf64_Sym *sym, unsigned int ndx,
      66  	      uintptr_t *refcook, uintptr_t *defcook,
      67  	      unsigned int *flags, const char *symname)
      68  #else
      69  uintptr_t
      70  la_symbind32 (Elf32_Sym *sym, unsigned int ndx,
      71  	      uintptr_t *refcook, uintptr_t *defcook,
      72  	      unsigned int *flags, const char *symname)
      73  #endif
      74  {
      75    if (*refcook != -1 && *defcook != -1 && symname[0] != '\0'
      76        && (*flags & LA_SYMB_DLSYM) == 0)
      77      fprintf (stderr, "la_symbind: %s %u\n", symname,
      78  	     *flags & (LA_SYMB_NOPLTENTER | LA_SYMB_NOPLTEXIT) ? 1 : 0);
      79    return sym->st_value;
      80  }