1  /* Audit module for tst-audit24d.
       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 <tst-auditmod24.h>
      24  
      25  #define AUDIT24_COOKIE     0x0
      26  #define AUDIT24MOD1_COOKIE 0x1
      27  #define AUDIT24MOD2_COOKIE 0x2
      28  #define AUDIT24MOD3_COOKIE 0x3
      29  #define AUDIT24MOD4_COOKIE 0x4
      30  
      31  unsigned int
      32  la_version (unsigned int version)
      33  {
      34    return LAV_CURRENT;
      35  }
      36  
      37  unsigned int
      38  la_objopen (struct link_map *map, Lmid_t lmid, uintptr_t *cookie)
      39  {
      40    const char *p = strrchr (map->l_name, '/');
      41    const char *l_name = p == NULL ? "tst-audit24d" : p + 1;
      42  
      43    uintptr_t ck = -1;
      44    if (strcmp (l_name, "tst-audit24dmod1.so") == 0)
      45      ck = AUDIT24MOD1_COOKIE;
      46    else if (strcmp (l_name, "tst-audit24dmod2.so") == 0)
      47      ck = AUDIT24MOD2_COOKIE;
      48    else if (strcmp (l_name, "tst-audit24dmod3.so") == 0)
      49      ck = AUDIT24MOD3_COOKIE;
      50    else if (strcmp (l_name, "tst-audit24dmod.so") == 0)
      51      ck = AUDIT24MOD4_COOKIE;
      52    else if (strcmp (l_name, "tst-audit24d") == 0)
      53      ck = AUDIT24_COOKIE;
      54  
      55    *cookie = ck;
      56    return ck == -1 ? 0 : LA_FLG_BINDFROM | LA_FLG_BINDTO;
      57  }
      58  
      59  static int
      60  tst_audit24dmod1_func1 (void)
      61  {
      62    return 1;
      63  }
      64  
      65  static int
      66  tst_audit24dmod2_func1 (void)
      67  {
      68    return 10;
      69  }
      70  
      71  static int
      72  tst_audit24dmod3_func1 (void)
      73  {
      74    return 30;
      75  }
      76  
      77  #include <stdio.h>
      78  
      79  #if __ELF_NATIVE_CLASS == 64
      80  uintptr_t
      81  la_symbind64 (Elf64_Sym *sym, unsigned int ndx,
      82  	      uintptr_t *refcook, uintptr_t *defcook,
      83  	      unsigned int *flags, const char *symname)
      84  #else
      85  uintptr_t
      86  la_symbind32 (Elf32_Sym *sym, unsigned int ndx,
      87  	      uintptr_t *refcook, uintptr_t *defcook,
      88  	      unsigned int *flags, const char *symname)
      89  #endif
      90  {
      91    if (*refcook == AUDIT24_COOKIE)
      92      {
      93        if (*defcook == AUDIT24MOD1_COOKIE)
      94  	  {
      95  	    if (strcmp (symname, "tst_audit24dmod1_func1") == 0)
      96  	      return (uintptr_t) tst_audit24dmod1_func1;
      97  	    else if (strcmp (symname, "tst_audit24dmod1_func2") == 0)
      98  	      return sym->st_value;
      99  	    abort ();
     100  	  }
     101        if (*defcook == AUDIT24MOD2_COOKIE
     102  	  && (strcmp (symname, "tst_audit24dmod2_func1") == 0))
     103  	return (uintptr_t) tst_audit24dmod2_func1;
     104  
     105        /* malloc functions.  */
     106        return sym->st_value;
     107      }
     108    else if (*refcook == AUDIT24MOD1_COOKIE)
     109      {
     110        if (*defcook == AUDIT24MOD3_COOKIE
     111  	  && strcmp (symname, "tst_audit24dmod3_func1") == 0)
     112  	{
     113  	  test_symbind_flags (*flags);
     114  
     115  	  return (uintptr_t) tst_audit24dmod3_func1;
     116  	}
     117      }
     118  
     119    if (symname[0] != '\0')
     120      abort ();
     121    return sym->st_value;
     122  }