1 /*- 2 * Copyright (c) 2023 Dmitry Chagin <dchagin@FreeBSD.org> 3 * 4 * SPDX-License-Identifier: BSD-2-Clause 5 */ 6 7 #include <sys/systm.h> 8 #include <vm/vm_param.h> 9 10 #include <atf-c.h> 11 #include <dlfcn.h> 12 13 static int jumpstack0(void) __noinline; 14 static int jumpstack1(void) __noinline; 15 16 static int (*socheckstack)(void) = NULL; 17 18 static int 19 checkstack(void) 20 { 21 void *fh; 22 23 if (socheckstack == NULL) { 24 fh = dlopen("libsoxstack.so", RTLD_LAZY); 25 ATF_REQUIRE(fh != NULL); 26 socheckstack = dlsym(fh, "checkstack"); 27 ATF_REQUIRE(socheckstack != NULL); 28 } 29 return (socheckstack()); 30 } 31 32 static int 33 jumpstack0(void) 34 { 35 char stack[SGROWSIZ]; 36 37 explicit_bzero(stack, sizeof(stack)); 38 return (checkstack()); 39 } 40 41 static int 42 jumpstack1(void) 43 { 44 char stack[SGROWSIZ * 2]; 45 46 explicit_bzero(stack, sizeof(stack)); 47 return (checkstack()); 48 } 49 50 ATF_TC_WITHOUT_HEAD(dlopen_test); 51 ATF_TC_BODY(dlopen_test, tc) 52 { 53 54 ATF_REQUIRE(jumpstack0() == 0); 55 ATF_REQUIRE(jumpstack1() == 0); 56 } 57 58 ATF_TP_ADD_TCS(tp) 59 { 60 61 ATF_TP_ADD_TC(tp, dlopen_test); 62 63 return (atf_no_error()); 64 } 65