sysdeps/x86_64/tst-auditmod4b.c

   1 /* Verify that changing AVX registers in audit library won't affect
   2    function parameter passing/return.  */
   3
   4 #include <dlfcn.h>
   5 #include <stdint.h>
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include <string.h>
   9 #include <unistd.h>
  10 #include <bits/wordsize.h>
  11 #include <gnu/lib-names.h>
  12
  13 unsigned int
  14 la_version (unsigned int v)
  15 {
  16   setlinebuf (stdout);
  17
  18   printf ("version: %u\n", v);
  19
  20   char buf[20];
  21   sprintf (buf, "%u", v);
  22
  23   return v;
  24 }
  25
  26 void
  27 la_activity (uintptr_t *cookie, unsigned int flag)
  28 {
  29   if (flag == LA_ACT_CONSISTENT)
  30     printf ("activity: consistent\n");
  31   else if (flag == LA_ACT_ADD)
  32     printf ("activity: add\n");
  33   else if (flag == LA_ACT_DELETE)
  34     printf ("activity: delete\n");
  35   else
  36     printf ("activity: unknown activity %u\n", flag);
  37 }
  38
  39 char *
  40 la_objsearch (const char *name, uintptr_t *cookie, unsigned int flag)
  41 {
  42   char buf[100];
  43   const char *flagstr;
  44   if (flag == LA_SER_ORIG)
  45     flagstr = "LA_SET_ORIG";
  46   else if (flag == LA_SER_LIBPATH)
  47     flagstr = "LA_SER_LIBPATH";
  48   else if (flag == LA_SER_RUNPATH)
  49     flagstr = "LA_SER_RUNPATH";
  50   else if (flag == LA_SER_CONFIG)
  51     flagstr = "LA_SER_CONFIG";
  52   else if (flag == LA_SER_DEFAULT)
  53     flagstr = "LA_SER_DEFAULT";
  54   else if (flag == LA_SER_SECURE)
  55     flagstr = "LA_SER_SECURE";
  56   else
  57     {
  58        sprintf (buf, "unknown flag %d", flag);
  59        flagstr = buf;
  60     }
  61   printf ("objsearch: %s, %s\n", name, flagstr);
  62
  63   return (char *) name;
  64 }
  65
  66 unsigned int
  67 la_objopen (struct link_map *l, Lmid_t lmid, uintptr_t *cookie)
  68 {
  69   printf ("objopen: %ld, %s\n", lmid, l->l_name);
  70
  71   return 3;
  72 }
  73
  74 void
  75 la_preinit (uintptr_t *cookie)
  76 {
  77   printf ("preinit\n");
  78 }
  79
  80 unsigned int
  81 la_objclose  (uintptr_t *cookie)
  82 {
  83   printf ("objclose\n");
  84   return 0;
  85 }
  86
  87 uintptr_t
  88 la_symbind32 (Elf32_Sym *sym, unsigned int ndx, uintptr_t *refcook,
  89               uintptr_t *defcook, unsigned int *flags, const char *symname)
  90 {
  91   printf ("symbind32: symname=%s, st_value=%#lx, ndx=%u, flags=%u\n",
  92           symname, (long int) sym->st_value, ndx, *flags);
  93
  94   return sym->st_value;
  95 }
  96
  97 uintptr_t
  98 la_symbind64 (Elf64_Sym *sym, unsigned int ndx, uintptr_t *refcook,
  99               uintptr_t *defcook, unsigned int *flags, const char *symname)
 100 {
 101   printf ("symbind64: symname=%s, st_value=%#lx, ndx=%u, flags=%u\n",
 102           symname, (long int) sym->st_value, ndx, *flags);
 103
 104   return sym->st_value;
 105 }
 106
 107 #include <tst-audit.h>
 108
 109 #ifdef __AVX__
 110 #include <immintrin.h>
 111 #include <cpuid.h>
 112
 113 static int avx = -1;
 114
 115 static inline int
 116 __attribute ((always_inline))
 117 check_avx (void)
 118 {
 119   if (avx == -1)
 120     {
 121       unsigned int eax, ebx, ecx, edx;
 122
 123       if (__get_cpuid (1, &eax, &ebx, &ecx, &edx)
 124           && (ecx & bit_AVX))
 125         avx = 1;
 126       else
 127         avx = 0;
 128     }
 129   return avx;
 130 }
 131 #else
 132 #include <emmintrin.h>
 133 #endif
 134
 135 ElfW(Addr)
 136 pltenter (ElfW(Sym) *sym, unsigned int ndx, uintptr_t *refcook,
 137           uintptr_t *defcook, La_regs *regs, unsigned int *flags,
 138           const char *symname, long int *framesizep)
 139 {
 140   printf ("pltenter: symname=%s, st_value=%#lx, ndx=%u, flags=%u\n",
 141           symname, (long int) sym->st_value, ndx, *flags);
 142
 143 #ifdef __AVX__
 144   if (check_avx () && strcmp (symname, "audit_test") == 0)
 145     {
 146       __m256i zero = _mm256_setzero_si256 ();
 147       if (memcmp (&regs->lr_vector[0], &zero, sizeof (zero))
 148           || memcmp (&regs->lr_vector[1], &zero, sizeof (zero))
 149           || memcmp (&regs->lr_vector[2], &zero, sizeof (zero))
 150           || memcmp (&regs->lr_vector[3], &zero, sizeof (zero))
 151           || memcmp (&regs->lr_vector[4], &zero, sizeof (zero))
 152           || memcmp (&regs->lr_vector[5], &zero, sizeof (zero))
 153           || memcmp (&regs->lr_vector[6], &zero, sizeof (zero))
 154           || memcmp (&regs->lr_vector[7], &zero, sizeof (zero)))
 155         abort ();
 156
 157       for (int i = 0; i < 8; i++)
 158         regs->lr_vector[i].ymm[0]
 159           = (La_x86_64_ymm) _mm256_set1_epi32 (i + 1);
 160
 161       __m256i ymm = _mm256_set1_epi32 (-1);
 162       asm volatile ("vmovdqa %0, %%ymm0" : : "x" (ymm) : "xmm0" );
 163       asm volatile ("vmovdqa %0, %%ymm1" : : "x" (ymm) : "xmm1" );
 164       asm volatile ("vmovdqa %0, %%ymm2" : : "x" (ymm) : "xmm2" );
 165       asm volatile ("vmovdqa %0, %%ymm3" : : "x" (ymm) : "xmm3" );
 166       asm volatile ("vmovdqa %0, %%ymm4" : : "x" (ymm) : "xmm4" );
 167       asm volatile ("vmovdqa %0, %%ymm5" : : "x" (ymm) : "xmm5" );
 168       asm volatile ("vmovdqa %0, %%ymm6" : : "x" (ymm) : "xmm6" );
 169       asm volatile ("vmovdqa %0, %%ymm7" : : "x" (ymm) : "xmm7" );
 170
 171       *framesizep = 1024;
 172     }
 173 #endif
 174
 175   return sym->st_value;
 176 }
 177
 178 unsigned int
 179 pltexit (ElfW(Sym) *sym, unsigned int ndx, uintptr_t *refcook,
 180          uintptr_t *defcook, const La_regs *inregs, La_retval *outregs,
 181          const char *symname)
 182 {
 183   printf ("pltexit: symname=%s, st_value=%#lx, ndx=%u, retval=%tu\n",
 184           symname, (long int) sym->st_value, ndx,
 185           (ptrdiff_t) outregs->int_retval);
 186
 187 #ifdef __AVX__
 188   if (check_avx () && strcmp (symname, "audit_test") == 0)
 189     {
 190       __m256i zero = _mm256_setzero_si256 ();
 191       if (memcmp (&outregs->lrv_vector0, &zero, sizeof (zero)))
 192         abort ();
 193
 194       for (int i = 0; i < 8; i++)
 195         {
 196           __m256i ymm = _mm256_set1_epi32 (i + 1);
 197           if (memcmp (&inregs->lr_vector[i], &ymm, sizeof (ymm)) != 0)
 198             abort ();
 199         }
 200
 201       outregs->lrv_vector0.ymm[0]
 202         = (La_x86_64_ymm) _mm256_set1_epi32 (0x12349876);
 203
 204       __m256i ymm = _mm256_set1_epi32 (-1);
 205       asm volatile ("vmovdqa %0, %%ymm0" : : "x" (ymm) : "xmm0" );
 206       asm volatile ("vmovdqa %0, %%ymm1" : : "x" (ymm) : "xmm1" );
 207     }
 208 #endif
 209
 210   return 0;
 211 }