1  /* Check LD_AUDIT for aarch64 specific ABI.
       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 <assert.h>
      20  #include <link.h>
      21  #include <string.h>
      22  #include <stdio.h>
      23  #include <stdlib.h>
      24  #include "tst-audit26mod.h"
      25  
      26  #define TEST_NAME  "tst-audit26"
      27  
      28  #define AUDIT26_COOKIE 0
      29  
      30  unsigned int
      31  la_version (unsigned int v)
      32  {
      33    return v;
      34  }
      35  
      36  unsigned int
      37  la_objopen (struct link_map *map, Lmid_t lmid, uintptr_t *cookie)
      38  {
      39    const char *p = strrchr (map->l_name, '/');
      40    const char *l_name = p == NULL ? map->l_name : p + 1;
      41    uintptr_t ck = -1;
      42    if (strncmp (l_name, TEST_NAME, strlen (TEST_NAME)) == 0)
      43      ck = AUDIT26_COOKIE;
      44    *cookie = ck;
      45    printf ("objopen: %ld, %s [cookie=%ld]\n", lmid, l_name, ck);
      46    return ck == -1 ? 0 : LA_FLG_BINDFROM | LA_FLG_BINDTO;
      47  }
      48  
      49  ElfW(Addr)
      50  la_aarch64_gnu_pltenter (ElfW(Sym) *sym __attribute__ ((unused)),
      51                           unsigned int ndx __attribute__ ((unused)),
      52                           uintptr_t *refcook, uintptr_t *defcook,
      53                           La_aarch64_regs *regs, unsigned int *flags,
      54                           const char *symname, long int *framesizep)
      55  {
      56    printf ("pltenter: symname=%s, st_value=%#lx, ndx=%u, flags=%u\n",
      57  	  symname, (long int) sym->st_value, ndx, *flags);
      58  
      59    if (strcmp (symname, "tst_audit26_func") == 0)
      60      {
      61        assert (regs->lr_xreg[0] == ARG1);
      62        assert (regs->lr_xreg[1] == ARG2);
      63        assert (regs->lr_xreg[2] == ARG3);
      64      }
      65    else
      66      abort ();
      67  
      68    assert (regs->lr_vpcs == 0);
      69  
      70    /* Clobber 'x8'.  */
      71    asm volatile ("mov x8, -1" : : : "x8");
      72  
      73    *framesizep = 1024;
      74  
      75    return sym->st_value;
      76  }
      77  
      78  unsigned int
      79  la_aarch64_gnu_pltexit (ElfW(Sym) *sym, unsigned int ndx, uintptr_t *refcook,
      80                          uintptr_t *defcook,
      81                          const struct La_aarch64_regs *inregs,
      82                          struct La_aarch64_retval *outregs, const char *symname)
      83  {
      84    printf ("pltexit: symname=%s, st_value=%#lx, ndx=%u\n",
      85  	  symname, (long int) sym->st_value, ndx);
      86  
      87    if (strcmp (symname, "tst_audit26_func") == 0)
      88      {
      89        assert (inregs->lr_xreg[0] == ARG1);
      90        assert (inregs->lr_xreg[1] == ARG2);
      91        assert (inregs->lr_xreg[2] == ARG3);
      92      }
      93    else
      94      abort ();
      95  
      96    assert (inregs->lr_vpcs == 0);
      97    assert (outregs->lrv_vpcs == 0);
      98  
      99    /* Clobber 'x8'.  */
     100    asm volatile ("mov x8, -1" : : : "x8");
     101  
     102    return 0;
     103  }