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