elf/tst-auditmod25.c

   1 /* Audit modules for tst-audit25a.
   2    Copyright (C) 2022-2024 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 }