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 #ifdef __LP64__
  99 # define pltenter la_x86_64_gnu_pltenter
 100 # define pltexit la_x86_64_gnu_pltexit
 101 # define La_regs La_x86_64_regs
 102 # define La_retval La_x86_64_retval
 103 #else
 104 # define pltenter la_x32_gnu_pltenter
 105 # define pltexit la_x32_gnu_pltexit
 106 # define La_regs La_x32_regs
 107 # define La_retval La_x32_retval
 108 #endif
 109 #define int_retval lrv_rax
 110
 111 #include <tst-audit.h>
 112
 113 ElfW(Addr)
 114 pltenter (ElfW(Sym) *sym, unsigned int ndx, uintptr_t *refcook,
 115           uintptr_t *defcook, La_regs *regs, unsigned int *flags,
 116           const char *symname, long int *framesizep)
 117 {
 118   printf ("pltenter: symname=%s, st_value=%#lx, ndx=%u, flags=%u\n",
 119           symname, (long int) sym->st_value, ndx, *flags);
 120
 121   __m128i minusone = _mm_set1_epi32 (-1);
 122
 123   if (strcmp (symname, "audit_test") == 0)
 124     {
 125       __m128i zero = _mm_setzero_si128 ();
 126       if (memcmp (&regs->lr_xmm[0], &zero, sizeof (zero))
 127           || memcmp (&regs->lr_xmm[1], &zero, sizeof (zero))
 128           || memcmp (&regs->lr_xmm[2], &zero, sizeof (zero))
 129           || memcmp (&regs->lr_xmm[3], &zero, sizeof (zero))
 130           || memcmp (&regs->lr_xmm[4], &zero, sizeof (zero))
 131           || memcmp (&regs->lr_xmm[5], &zero, sizeof (zero))
 132           || memcmp (&regs->lr_xmm[6], &zero, sizeof (zero))
 133           || memcmp (&regs->lr_xmm[7], &zero, sizeof (zero)))
 134         abort ();
 135
 136       for (int i = 0; i < 8; i++)
 137         regs->lr_xmm[i] = (La_x86_64_xmm) _mm_set1_epi32 (i + 1);
 138
 139       *framesizep = 1024;
 140     }
 141
 142   asm volatile ("movdqa %0, %%xmm0" : : "x" (minusone) : "xmm0" );
 143   asm volatile ("movdqa %0, %%xmm1" : : "x" (minusone) : "xmm1" );
 144   asm volatile ("movdqa %0, %%xmm2" : : "x" (minusone) : "xmm2" );
 145   asm volatile ("movdqa %0, %%xmm3" : : "x" (minusone) : "xmm3" );
 146   asm volatile ("movdqa %0, %%xmm4" : : "x" (minusone) : "xmm4" );
 147   asm volatile ("movdqa %0, %%xmm5" : : "x" (minusone) : "xmm5" );
 148   asm volatile ("movdqa %0, %%xmm6" : : "x" (minusone) : "xmm6" );
 149   asm volatile ("movdqa %0, %%xmm7" : : "x" (minusone) : "xmm7" );
 150
 151   return sym->st_value;
 152 }
 153
 154 unsigned int
 155 pltexit (ElfW(Sym) *sym, unsigned int ndx, uintptr_t *refcook,
 156          uintptr_t *defcook, const La_regs *inregs, La_retval *outregs,
 157          const char *symname)
 158 {
 159   printf ("pltexit: symname=%s, st_value=%#lx, ndx=%u, retval=%tu\n",
 160           symname, (long int) sym->st_value, ndx,
 161           (ptrdiff_t) outregs->int_retval);
 162
 163   __m128i xmm;
 164
 165   if (strcmp (symname, "audit_test") == 0)
 166     {
 167       __m128i zero = _mm_setzero_si128 ();
 168       if (memcmp (&outregs->lrv_xmm0, &zero, sizeof (zero)))
 169         abort ();
 170
 171       for (int i = 0; i < 8; i++)
 172         {
 173           xmm = _mm_set1_epi32 (i + 1);
 174           if (memcmp (&inregs->lr_xmm[i], &xmm, sizeof (xmm)) != 0)
 175             abort ();
 176         }
 177
 178       outregs->lrv_xmm0 = (La_x86_64_xmm) _mm_set1_epi32 (0x12349876);
 179     }
 180
 181   xmm = _mm_set1_epi32 (-1);
 182   asm volatile ("movdqa %0, %%xmm0" : : "x" (xmm) : "xmm0" );
 183   asm volatile ("movdqa %0, %%xmm1" : : "x" (xmm) : "xmm1" );
 184
 185   return 0;
 186 }