/* Verify that changing AVX registers in audit library won't affect function parameter passing/return. */ #include <dlfcn.h> #include <stdint.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <bits/wordsize.h> #include <gnu/lib-names.h> unsigned int la_version (unsigned int v) { setlinebuf (stdout); printf ("version: %u\n", v); char buf[20]; sprintf (buf, "%u", v); return v; } void la_activity (uintptr_t *cookie, unsigned int flag) { if (flag == LA_ACT_CONSISTENT) printf ("activity: consistent\n"); else if (flag == LA_ACT_ADD) printf ("activity: add\n"); else if (flag == LA_ACT_DELETE) printf ("activity: delete\n"); else printf ("activity: unknown activity %u\n", flag); } char * la_objsearch (const char *name, uintptr_t *cookie, unsigned int flag) { char buf[100]; const char *flagstr; if (flag == LA_SER_ORIG) flagstr = "LA_SET_ORIG"; else if (flag == LA_SER_LIBPATH) flagstr = "LA_SER_LIBPATH"; else if (flag == LA_SER_RUNPATH) flagstr = "LA_SER_RUNPATH"; else if (flag == LA_SER_CONFIG) flagstr = "LA_SER_CONFIG"; else if (flag == LA_SER_DEFAULT) flagstr = "LA_SER_DEFAULT"; else if (flag == LA_SER_SECURE) flagstr = "LA_SER_SECURE"; else { sprintf (buf, "unknown flag %d", flag); flagstr = buf; } printf ("objsearch: %s, %s\n", name, flagstr); return (char *) name; } unsigned int la_objopen (struct link_map *l, Lmid_t lmid, uintptr_t *cookie) { printf ("objopen: %ld, %s\n", lmid, l->l_name); return 3; } void la_preinit (uintptr_t *cookie) { printf ("preinit\n"); } unsigned int la_objclose (uintptr_t *cookie) { printf ("objclose\n"); return 0; } uintptr_t la_symbind64 (Elf64_Sym *sym, unsigned int ndx, uintptr_t *refcook, uintptr_t *defcook, unsigned int *flags, const char *symname) { printf ("symbind64: symname=%s, st_value=%#lx, ndx=%u, flags=%u\n", symname, (long int) sym->st_value, ndx, *flags); return sym->st_value; } #include <tst-audit.h> #ifdef __AVX__ #include <immintrin.h> #include <cpuid.h> static int avx = -1; static inline int __attribute ((always_inline)) check_avx (void) { if (avx == -1) { unsigned int eax, ebx, ecx, edx; if (__get_cpuid (1, &eax, &ebx, &ecx, &edx) && (ecx & bit_AVX)) avx = 1; else avx = 0; } return avx; } #else #include <emmintrin.h> #endif ElfW(Addr) pltenter (ElfW(Sym) *sym, unsigned int ndx, uintptr_t *refcook, uintptr_t *defcook, La_regs *regs, unsigned int *flags, const char *symname, long int *framesizep) { printf ("pltenter: symname=%s, st_value=%#lx, ndx=%u, flags=%u\n", symname, (long int) sym->st_value, ndx, *flags); #ifdef __AVX__ if (check_avx () && strcmp (symname, "audit_test") == 0) { int i; __m128i xmm = _mm_setzero_si128 (); for (i = 0; i < 8; i++) if (memcmp (®s->lr_xmm[i], &xmm, sizeof (xmm)) || memcmp (®s->lr_vector[i], &xmm, sizeof (xmm))) abort (); for (i = 0; i < 8; i += 2) { regs->lr_xmm[i] = (La_x86_64_xmm) _mm_set1_epi32 (i + 1); regs->lr_vector[i].xmm[0] = regs->lr_xmm[i]; regs->lr_vector[i + 1].ymm[0] = (La_x86_64_ymm) _mm256_set1_epi32 (i + 2); regs->lr_xmm[i + 1] = regs->lr_vector[i + 1].xmm[0]; } __m256i ymm = _mm256_set1_epi32 (-1); asm volatile ("vmovdqa %0, %%ymm0" : : "x" (ymm) : "xmm0" ); asm volatile ("vmovdqa %0, %%ymm1" : : "x" (ymm) : "xmm1" ); asm volatile ("vmovdqa %0, %%ymm2" : : "x" (ymm) : "xmm2" ); asm volatile ("vmovdqa %0, %%ymm3" : : "x" (ymm) : "xmm3" ); asm volatile ("vmovdqa %0, %%ymm4" : : "x" (ymm) : "xmm4" ); asm volatile ("vmovdqa %0, %%ymm5" : : "x" (ymm) : "xmm5" ); asm volatile ("vmovdqa %0, %%ymm6" : : "x" (ymm) : "xmm6" ); asm volatile ("vmovdqa %0, %%ymm7" : : "x" (ymm) : "xmm7" ); *framesizep = 1024; } #endif return sym->st_value; } unsigned int pltexit (ElfW(Sym) *sym, unsigned int ndx, uintptr_t *refcook, uintptr_t *defcook, const La_regs *inregs, La_retval *outregs, const char *symname) { printf ("pltexit: symname=%s, st_value=%#lx, ndx=%u, retval=%tu\n", symname, (long int) sym->st_value, ndx, (ptrdiff_t) outregs->int_retval); #ifdef __AVX__ if (check_avx () && strcmp (symname, "audit_test") == 0) { int i; __m128i xmm = _mm_setzero_si128 (); if (memcmp (&outregs->lrv_xmm0, &xmm, sizeof (xmm)) || memcmp (&outregs->lrv_vector0, &xmm, sizeof (xmm))) abort (); __m256i ymm; for (i = 0; i < 8; i += 2) { xmm = _mm_set1_epi32 (i + 0x100); if (memcmp (&inregs->lr_xmm[i], &xmm, sizeof (xmm)) || memcmp (&inregs->lr_vector[i], &xmm, sizeof (xmm))) abort (); ymm = _mm256_set1_epi32 (i + 0x101); if (memcmp (&inregs->lr_xmm[i + 1], &inregs->lr_vector[i + 1].xmm[0], sizeof (xmm)) || memcmp (&inregs->lr_vector[i + 1], &ymm, sizeof (ymm))) abort (); } outregs->lrv_vector0.ymm[0] = (La_x86_64_ymm) _mm256_set1_epi32 (0x12349876); ymm = _mm256_set1_epi32 (-1); asm volatile ("vmovdqa %0, %%ymm0" : : "x" (ymm) : "xmm0" ); asm volatile ("vmovdqa %0, %%ymm1" : : "x" (ymm) : "xmm1" ); } #endif return 0; }