sysdeps/x86_64/tst-auditmod10b.c

   1 /* Copyright (C) 2012-2023 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 /* Verify that changing AVX512 registers in audit library won't affect
  19    function parameter passing/return.  */
  20
  21 #include <dlfcn.h>
  22 #include <link.h>
  23 #include <stddef.h>
  24 #include <stdint.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <unistd.h>
  29 #include <bits/wordsize.h>
  30 #include <gnu/lib-names.h>
  31
  32 unsigned int
  33 la_version (unsigned int v)
  34 {
  35   setlinebuf (stdout);
  36
  37   printf ("version: %u\n", v);
  38
  39   char buf[20];
  40   sprintf (buf, "%u", v);
  41
  42   return v;
  43 }
  44
  45 void
  46 la_activity (uintptr_t *cookie, unsigned int flag)
  47 {
  48   if (flag == LA_ACT_CONSISTENT)
  49     printf ("activity: consistent\n");
  50   else if (flag == LA_ACT_ADD)
  51     printf ("activity: add\n");
  52   else if (flag == LA_ACT_DELETE)
  53     printf ("activity: delete\n");
  54   else
  55     printf ("activity: unknown activity %u\n", flag);
  56 }
  57
  58 char *
  59 la_objsearch (const char *name, uintptr_t *cookie, unsigned int flag)
  60 {
  61   char buf[100];
  62   const char *flagstr;
  63   if (flag == LA_SER_ORIG)
  64     flagstr = "LA_SET_ORIG";
  65   else if (flag == LA_SER_LIBPATH)
  66     flagstr = "LA_SER_LIBPATH";
  67   else if (flag == LA_SER_RUNPATH)
  68     flagstr = "LA_SER_RUNPATH";
  69   else if (flag == LA_SER_CONFIG)
  70     flagstr = "LA_SER_CONFIG";
  71   else if (flag == LA_SER_DEFAULT)
  72     flagstr = "LA_SER_DEFAULT";
  73   else if (flag == LA_SER_SECURE)
  74     flagstr = "LA_SER_SECURE";
  75   else
  76     {
  77        sprintf (buf, "unknown flag %d", flag);
  78        flagstr = buf;
  79     }
  80   printf ("objsearch: %s, %s\n", name, flagstr);
  81
  82   return (char *) name;
  83 }
  84
  85 unsigned int
  86 la_objopen (struct link_map *l, Lmid_t lmid, uintptr_t *cookie)
  87 {
  88   printf ("objopen: %ld, %s\n", lmid, l->l_name);
  89
  90   return 3;
  91 }
  92
  93 void
  94 la_preinit (uintptr_t *cookie)
  95 {
  96   printf ("preinit\n");
  97 }
  98
  99 unsigned int
 100 la_objclose  (uintptr_t *cookie)
 101 {
 102   printf ("objclose\n");
 103   return 0;
 104 }
 105
 106 uintptr_t
 107 la_symbind32 (Elf32_Sym *sym, unsigned int ndx, uintptr_t *refcook,
 108               uintptr_t *defcook, unsigned int *flags, const char *symname)
 109 {
 110   printf ("symbind32: symname=%s, st_value=%#lx, ndx=%u, flags=%u\n",
 111           symname, (long int) sym->st_value, ndx, *flags);
 112
 113   return sym->st_value;
 114 }
 115
 116 uintptr_t
 117 la_symbind64 (Elf64_Sym *sym, unsigned int ndx, uintptr_t *refcook,
 118               uintptr_t *defcook, unsigned int *flags, const char *symname)
 119 {
 120   printf ("symbind64: symname=%s, st_value=%#lx, ndx=%u, flags=%u\n",
 121           symname, (long int) sym->st_value, ndx, *flags);
 122
 123   return sym->st_value;
 124 }
 125
 126 #include <tst-audit.h>
 127
 128 #ifdef __AVX512F__
 129 #include <immintrin.h>
 130 #include <cpuid.h>
 131
 132 static int
 133 check_avx512 (void)
 134 {
 135   unsigned int eax, ebx, ecx, edx;
 136
 137   if (__get_cpuid (1, &eax, &ebx, &ecx, &edx) == 0
 138       || (ecx & (bit_AVX | bit_OSXSAVE)) != (bit_AVX | bit_OSXSAVE))
 139     return 0;
 140
 141   __cpuid_count (7, 0, eax, ebx, ecx, edx);
 142   if (!(ebx & bit_AVX512F))
 143     return 0;
 144
 145   asm ("xgetbv" : "=a" (eax), "=d" (edx) : "c" (0));
 146
 147   /* Verify that ZMM, YMM and XMM states are enabled.  */
 148   return (eax & 0xe6) == 0xe6;
 149 }
 150
 151 #else
 152 #include <emmintrin.h>
 153 #endif
 154
 155 ElfW(Addr)
 156 pltenter (ElfW(Sym) *sym, unsigned int ndx, uintptr_t *refcook,
 157           uintptr_t *defcook, La_regs *regs, unsigned int *flags,
 158           const char *symname, long int *framesizep)
 159 {
 160   printf ("pltenter: symname=%s, st_value=%#lx, ndx=%u, flags=%u\n",
 161           symname, (long int) sym->st_value, ndx, *flags);
 162
 163 #ifdef __AVX512F__
 164   if (check_avx512 () && strcmp (symname, "audit_test") == 0)
 165     {
 166       __m512i zero = _mm512_setzero_si512 ();
 167       if (memcmp (&regs->lr_vector[0], &zero, sizeof (zero))
 168           || memcmp (&regs->lr_vector[1], &zero, sizeof (zero))
 169           || memcmp (&regs->lr_vector[2], &zero, sizeof (zero))
 170           || memcmp (&regs->lr_vector[3], &zero, sizeof (zero))
 171           || memcmp (&regs->lr_vector[4], &zero, sizeof (zero))
 172           || memcmp (&regs->lr_vector[5], &zero, sizeof (zero))
 173           || memcmp (&regs->lr_vector[6], &zero, sizeof (zero))
 174           || memcmp (&regs->lr_vector[7], &zero, sizeof (zero)))
 175         abort ();
 176
 177       for (int i = 0; i < 8; i++)
 178         regs->lr_vector[i].zmm[0]
 179           = (La_x86_64_zmm) _mm512_set1_epi64 (i + 1);
 180
 181       __m512i zmm = _mm512_set1_epi64 (-1);
 182       asm volatile ("vmovdqa64 %0, %%zmm0" : : "x" (zmm) : "xmm0" );
 183       asm volatile ("vmovdqa64 %0, %%zmm1" : : "x" (zmm) : "xmm1" );
 184       asm volatile ("vmovdqa64 %0, %%zmm2" : : "x" (zmm) : "xmm2" );
 185       asm volatile ("vmovdqa64 %0, %%zmm3" : : "x" (zmm) : "xmm3" );
 186       asm volatile ("vmovdqa64 %0, %%zmm4" : : "x" (zmm) : "xmm4" );
 187       asm volatile ("vmovdqa64 %0, %%zmm5" : : "x" (zmm) : "xmm5" );
 188       asm volatile ("vmovdqa64 %0, %%zmm6" : : "x" (zmm) : "xmm6" );
 189       asm volatile ("vmovdqa64 %0, %%zmm7" : : "x" (zmm) : "xmm7" );
 190
 191       *framesizep = 1024;
 192     }
 193 #endif
 194
 195   return sym->st_value;
 196 }
 197
 198 unsigned int
 199 pltexit (ElfW(Sym) *sym, unsigned int ndx, uintptr_t *refcook,
 200          uintptr_t *defcook, const La_regs *inregs, La_retval *outregs,
 201          const char *symname)
 202 {
 203   printf ("pltexit: symname=%s, st_value=%#lx, ndx=%u, retval=%tu\n",
 204           symname, (long int) sym->st_value, ndx,
 205           (ptrdiff_t) outregs->int_retval);
 206
 207 #ifdef __AVX512F__
 208   if (check_avx512 () && strcmp (symname, "audit_test") == 0)
 209     {
 210       __m512i zero = _mm512_setzero_si512 ();
 211       if (memcmp (&outregs->lrv_vector0, &zero, sizeof (zero)))
 212         abort ();
 213
 214       for (int i = 0; i < 8; i++)
 215         {
 216           __m512i zmm = _mm512_set1_epi64 (i + 1);
 217           if (memcmp (&inregs->lr_vector[i], &zmm, sizeof (zmm)) != 0)
 218             abort ();
 219         }
 220
 221       outregs->lrv_vector0.zmm[0]
 222         = (La_x86_64_zmm) _mm512_set1_epi64 (0x12349876);
 223
 224       __m512i zmm = _mm512_set1_epi64 (-1);
 225       asm volatile ("vmovdqa64 %0, %%zmm0" : : "x" (zmm) : "xmm0" );
 226       asm volatile ("vmovdqa64 %0, %%zmm1" : : "x" (zmm) : "xmm1" );
 227     }
 228 #endif
 229
 230   return 0;
 231 }