Mercurial > illumos > illumos-gate
view usr/src/cmd/dtrace/test/tst/sparc/ustack/tst.helper.c @ 3944:75371f172291
6484266 fasttrap needs to check for duplicate offsets
6497891 dtrace -G can fail due to uninitialized data
6504328 mapid disabling isn't enough
6512813 calendar-based DTrace tests fail when not in US/Pacific
6513027 tst.[v]fork.d needs updating for forksys()
6534984 fasttrap emulation code could use some work
6534988 remove the lint work-around from fasttrap
6534991 prepare the DTrace test suite for PIT
author | ahl |
---|---|
date | Sun, 01 Apr 2007 23:38:22 -0700 |
parents | 71bab08d24b2 |
children |
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/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2007 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #pragma ident "%Z%%M% %I% %E% SMI" #include <stdint.h> #include <stdlib.h> #include <strings.h> int baz(void) { return (8); } static int foo(void) { /* * In order to assure that our helper is properly employed to identify * the frame, we're going to trampoline through data. */ uint32_t instr[] = { 0x9de3bfa0, /* save %sp, -0x60, %sp */ 0x40000000, /* call baz */ 0x01000000, /* nop */ 0x81c7e008, /* ret */ 0x81e80000 /* restore */ }; uint32_t *fp = malloc(sizeof (instr)); /* * Do our little relocation dance. */ instr[1] |= ((uintptr_t)baz - (uintptr_t)&fp[1]) >> 2; /* * Copy the code to the heap (it's a pain to build in ON with an * executable stack). */ bcopy(instr, fp, sizeof (instr)); (*(int (*)(void))fp)(); free(fp); return (0); } int main(int argc, char **argv) { for (;;) { foo(); } return (0); }