elf/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_symbind64 (Elf64_Sym *sym, unsigned int ndx, uintptr_t *refcook,
  89               uintptr_t *defcook, unsigned int *flags, const char *symname)
  90 {
  91   printf ("symbind64: 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 # ifndef __ILP32__
  98 # define pltenter la_x86_64_gnu_pltenter
  99 # define pltexit la_x86_64_gnu_pltexit
 100 # define La_regs La_x86_64_regs
 101 # define La_retval La_x86_64_retval
 102 #else
 103 # define pltenter la_x32_gnu_pltenter
 104 # define pltexit la_x32_gnu_pltexit
 105 # define La_regs La_x32_regs
 106 # define La_retval La_x32_retval
 107 #endif
 108 #define int_retval lrv_rax
 109
 110 #include <tst-audit.h>
 111
 112 #ifdef __AVX__
 113 #include <immintrin.h>
 114 #include <cpuid.h>
 115
 116 static int avx = -1;
 117
 118 static inline int
 119 __attribute ((always_inline))
 120 check_avx (void)
 121 {
 122   if (avx == -1)
 123     {
 124       unsigned int eax, ebx, ecx, edx;
 125
 126       if (__get_cpuid (1, &eax, &ebx, &ecx, &edx)
 127           && (ecx & bit_AVX))
 128         avx = 1;
 129       else
 130         avx = 0;
 131     }
 132   return avx;
 133 }
 134 #else
 135 #include <emmintrin.h>
 136 #endif
 137
 138 ElfW(Addr)
 139 pltenter (ElfW(Sym) *sym, unsigned int ndx, uintptr_t *refcook,
 140           uintptr_t *defcook, La_regs *regs, unsigned int *flags,
 141           const char *symname, long int *framesizep)
 142 {
 143   printf ("pltenter: symname=%s, st_value=%#lx, ndx=%u, flags=%u\n",
 144           symname, (long int) sym->st_value, ndx, *flags);
 145
 146 #ifdef __AVX__
 147   if (check_avx () && strcmp (symname, "audit_test") == 0)
 148     {
 149       __m256i zero = _mm256_setzero_si256 ();
 150       if (memcmp (&regs->lr_vector[0], &zero, sizeof (zero))
 151           || memcmp (&regs->lr_vector[1], &zero, sizeof (zero))
 152           || memcmp (&regs->lr_vector[2], &zero, sizeof (zero))
 153           || memcmp (&regs->lr_vector[3], &zero, sizeof (zero))
 154           || memcmp (&regs->lr_vector[4], &zero, sizeof (zero))
 155           || memcmp (&regs->lr_vector[5], &zero, sizeof (zero))
 156           || memcmp (&regs->lr_vector[6], &zero, sizeof (zero))
 157           || memcmp (&regs->lr_vector[7], &zero, sizeof (zero)))
 158         abort ();
 159
 160       for (int i = 0; i < 8; i++)
 161         regs->lr_vector[i].ymm[0]
 162           = (La_x86_64_ymm) _mm256_set1_epi32 (i + 1);
 163
 164       __m256i ymm = _mm256_set1_epi32 (-1);
 165       asm volatile ("vmovdqa %0, %%ymm0" : : "x" (ymm) : "xmm0" );
 166       asm volatile ("vmovdqa %0, %%ymm1" : : "x" (ymm) : "xmm1" );
 167       asm volatile ("vmovdqa %0, %%ymm2" : : "x" (ymm) : "xmm2" );
 168       asm volatile ("vmovdqa %0, %%ymm3" : : "x" (ymm) : "xmm3" );
 169       asm volatile ("vmovdqa %0, %%ymm4" : : "x" (ymm) : "xmm4" );
 170       asm volatile ("vmovdqa %0, %%ymm5" : : "x" (ymm) : "xmm5" );
 171       asm volatile ("vmovdqa %0, %%ymm6" : : "x" (ymm) : "xmm6" );
 172       asm volatile ("vmovdqa %0, %%ymm7" : : "x" (ymm) : "xmm7" );
 173
 174       *framesizep = 1024;
 175     }
 176 #endif
 177
 178   return sym->st_value;
 179 }
 180
 181 unsigned int
 182 pltexit (ElfW(Sym) *sym, unsigned int ndx, uintptr_t *refcook,
 183          uintptr_t *defcook, const La_regs *inregs, La_retval *outregs,
 184          const char *symname)
 185 {
 186   printf ("pltexit: symname=%s, st_value=%#lx, ndx=%u, retval=%tu\n",
 187           symname, (long int) sym->st_value, ndx,
 188           (ptrdiff_t) outregs->int_retval);
 189
 190 #ifdef __AVX__
 191   if (check_avx () && strcmp (symname, "audit_test") == 0)
 192     {
 193       __m256i zero = _mm256_setzero_si256 ();
 194       if (memcmp (&outregs->lrv_vector0, &zero, sizeof (zero)))
 195         abort ();
 196
 197       for (int i = 0; i < 8; i++)
 198         {
 199           __m256i ymm = _mm256_set1_epi32 (i + 1);
 200           if (memcmp (&inregs->lr_vector[i], &ymm, sizeof (ymm)) != 0)
 201             abort ();
 202         }
 203
 204       outregs->lrv_vector0.ymm[0]
 205         = (La_x86_64_ymm) _mm256_set1_epi32 (0x12349876);
 206
 207       __m256i ymm = _mm256_set1_epi32 (-1);
 208       asm volatile ("vmovdqa %0, %%ymm0" : : "x" (ymm) : "xmm0" );
 209       asm volatile ("vmovdqa %0, %%ymm1" : : "x" (ymm) : "xmm1" );
 210     }
 211 #endif
 212
 213   return 0;
 214 }