1 /* 2 * This file and its contents are supplied under the terms of the 3 * Common Development and Distribution License ("CDDL"), version 1.0. 4 * You may only use this file in accordance with the terms of version 5 * 1.0 of the CDDL. 6 * 7 * A full copy of the text of the CDDL should have accompanied this 8 * source. A copy of the CDDL is also available via the Internet at 9 * http://www.illumos.org/license/CDDL. 10 */ 11 12 /* 13 * Copyright 2023 Oxide Computer Company 14 */ 15 16 /* 17 * The purpose of this program is to go through and replace all the FPU 18 * registers in the floating point state in a ucontext_t and verify that we see 19 * what we expected here. 20 */ 21 22 #include <err.h> 23 #include <stdlib.h> 24 #include <ucontext.h> 25 26 #include "xsave_util.h" 27 28 xsu_fpu_t to_set, found; 29 30 static void 31 setcontext_replace_check(uint32_t hwsup) 32 { 33 xsu_getfpu(&found, hwsup); 34 if (xsu_same(&to_set, &found, hwsup)) { 35 (void) printf("TEST PASSED: setcontext() correctly wrote FPU " 36 "contents\n"); 37 exit(EXIT_SUCCESS); 38 } else { 39 errx(EXIT_FAILURE, "TEST_FAILED: setcontext() did not write " 40 "full FPU state"); 41 } 42 } 43 44 int 45 main(void) 46 { 47 ucontext_t *ctx; 48 uint32_t start = arc4random(); 49 uint32_t hwsup = xsu_hwsupport(); 50 51 ctx = ucontext_alloc(0); 52 if (ctx == NULL) { 53 err(EXIT_FAILURE, "failed to get allocate ucontext_t"); 54 } 55 (void) printf("filling starting at 0x%x\n", start); 56 xsu_fill(&to_set, hwsup, start); 57 if (getcontext_extd(ctx, 0) != 0) { 58 err(EXIT_FAILURE, "failed to get extended context"); 59 } 60 61 xsu_overwrite_uctx(ctx, &to_set, hwsup); 62 xsu_ustack_alloc(ctx); 63 makecontext(ctx, setcontext_replace_check, 1, hwsup); 64 (void) setcontext(ctx); 65 66 err(EXIT_FAILURE, "TEST FAILED: set context did not work!"); 67 } 68