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