elf/tst-auditmod5b.c

   1 /* Verify that changing xmm 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 #include <emmintrin.h>
  13
  14 unsigned int
  15 la_version (unsigned int v)
  16 {
  17   setlinebuf (stdout);
  18
  19   printf ("version: %u\n", v);
  20
  21   char buf[20];
  22   sprintf (buf, "%u", v);
  23
  24   return v;
  25 }
  26
  27 void
  28 la_activity (uintptr_t *cookie, unsigned int flag)
  29 {
  30   if (flag == LA_ACT_CONSISTENT)
  31     printf ("activity: consistent\n");
  32   else if (flag == LA_ACT_ADD)
  33     printf ("activity: add\n");
  34   else if (flag == LA_ACT_DELETE)
  35     printf ("activity: delete\n");
  36   else
  37     printf ("activity: unknown activity %u\n", flag);
  38 }
  39
  40 char *
  41 la_objsearch (const char *name, uintptr_t *cookie, unsigned int flag)
  42 {
  43   char buf[100];
  44   const char *flagstr;
  45   if (flag == LA_SER_ORIG)
  46     flagstr = "LA_SET_ORIG";
  47   else if (flag == LA_SER_LIBPATH)
  48     flagstr = "LA_SER_LIBPATH";
  49   else if (flag == LA_SER_RUNPATH)
  50     flagstr = "LA_SER_RUNPATH";
  51   else if (flag == LA_SER_CONFIG)
  52     flagstr = "LA_SER_CONFIG";
  53   else if (flag == LA_SER_DEFAULT)
  54     flagstr = "LA_SER_DEFAULT";
  55   else if (flag == LA_SER_SECURE)
  56     flagstr = "LA_SER_SECURE";
  57   else
  58     {
  59        sprintf (buf, "unknown flag %d", flag);
  60        flagstr = buf;
  61     }
  62   printf ("objsearch: %s, %s\n", name, flagstr);
  63
  64   return (char *) name;
  65 }
  66
  67 unsigned int
  68 la_objopen (struct link_map *l, Lmid_t lmid, uintptr_t *cookie)
  69 {
  70   printf ("objopen: %ld, %s\n", lmid, l->l_name);
  71
  72   return 3;
  73 }
  74
  75 void
  76 la_preinit (uintptr_t *cookie)
  77 {
  78   printf ("preinit\n");
  79 }
  80
  81 unsigned int
  82 la_objclose  (uintptr_t *cookie)
  83 {
  84   printf ("objclose\n");
  85   return 0;
  86 }
  87
  88 uintptr_t
  89 la_symbind64 (Elf64_Sym *sym, unsigned int ndx, uintptr_t *refcook,
  90               uintptr_t *defcook, unsigned int *flags, const char *symname)
  91 {
  92   printf ("symbind64: symname=%s, st_value=%#lx, ndx=%u, flags=%u\n",
  93           symname, (long int) sym->st_value, ndx, *flags);
  94
  95   return sym->st_value;
  96 }
  97
  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 #define int_retval lrv_rax
 103
 104 #include <tst-audit.h>
 105
 106 ElfW(Addr)
 107 pltenter (ElfW(Sym) *sym, unsigned int ndx, uintptr_t *refcook,
 108           uintptr_t *defcook, La_regs *regs, unsigned int *flags,
 109           const char *symname, long int *framesizep)
 110 {
 111   printf ("pltenter: symname=%s, st_value=%#lx, ndx=%u, flags=%u\n",
 112           symname, (long int) sym->st_value, ndx, *flags);
 113
 114   __m128i minusone = _mm_set1_epi32 (-1);
 115
 116   if (strcmp (symname, "audit_test") == 0)
 117     {
 118       __m128i zero = _mm_setzero_si128 ();
 119       if (memcmp (&regs->lr_xmm[0], &zero, sizeof (zero))
 120           || memcmp (&regs->lr_xmm[1], &zero, sizeof (zero))
 121           || memcmp (&regs->lr_xmm[2], &zero, sizeof (zero))
 122           || memcmp (&regs->lr_xmm[3], &zero, sizeof (zero))
 123           || memcmp (&regs->lr_xmm[4], &zero, sizeof (zero))
 124           || memcmp (&regs->lr_xmm[5], &zero, sizeof (zero))
 125           || memcmp (&regs->lr_xmm[6], &zero, sizeof (zero))
 126           || memcmp (&regs->lr_xmm[7], &zero, sizeof (zero)))
 127         abort ();
 128
 129       for (int i = 0; i < 8; i++)
 130         regs->lr_xmm[i] = (La_x86_64_xmm) _mm_set1_epi32 (i + 1);
 131
 132       *framesizep = 1024;
 133     }
 134
 135   asm volatile ("movdqa %0, %%xmm0" : : "x" (minusone) : "xmm0" );
 136   asm volatile ("movdqa %0, %%xmm1" : : "x" (minusone) : "xmm1" );
 137   asm volatile ("movdqa %0, %%xmm2" : : "x" (minusone) : "xmm2" );
 138   asm volatile ("movdqa %0, %%xmm3" : : "x" (minusone) : "xmm3" );
 139   asm volatile ("movdqa %0, %%xmm4" : : "x" (minusone) : "xmm4" );
 140   asm volatile ("movdqa %0, %%xmm5" : : "x" (minusone) : "xmm5" );
 141   asm volatile ("movdqa %0, %%xmm6" : : "x" (minusone) : "xmm6" );
 142   asm volatile ("movdqa %0, %%xmm7" : : "x" (minusone) : "xmm7" );
 143
 144   return sym->st_value;
 145 }
 146
 147 unsigned int
 148 pltexit (ElfW(Sym) *sym, unsigned int ndx, uintptr_t *refcook,
 149          uintptr_t *defcook, const La_regs *inregs, La_retval *outregs,
 150          const char *symname)
 151 {
 152   printf ("pltexit: symname=%s, st_value=%#lx, ndx=%u, retval=%tu\n",
 153           symname, (long int) sym->st_value, ndx, outregs->int_retval);
 154
 155   __m128i xmm;
 156
 157   if (strcmp (symname, "audit_test") == 0)
 158     {
 159       __m128i zero = _mm_setzero_si128 ();
 160       if (memcmp (&outregs->lrv_xmm0, &zero, sizeof (zero)))
 161         abort ();
 162
 163       for (int i = 0; i < 8; i++)
 164         {
 165           xmm = _mm_set1_epi32 (i + 1);
 166           if (memcmp (&inregs->lr_xmm[i], &xmm, sizeof (xmm)) != 0)
 167             abort ();
 168         }
 169
 170       outregs->lrv_xmm0 = (La_x86_64_xmm) _mm_set1_epi32 (0x12349876);
 171     }
 172
 173   xmm = _mm_set1_epi32 (-1);
 174   asm volatile ("movdqa %0, %%xmm0" : : "x" (xmm) : "xmm0" );
 175   asm volatile ("movdqa %0, %%xmm1" : : "x" (xmm) : "xmm1" );
 176
 177   return 0;
 178 }