linux_exec_machdep.c revision 1.1.2.2
1 1.1.2.2 skrll /* $NetBSD: linux_exec_machdep.c,v 1.1.2.2 2004/11/14 08:15:33 skrll Exp $ */ 2 1.1.2.2 skrll 3 1.1.2.2 skrll /*- 4 1.1.2.2 skrll * Copyright (c) 2004 The NetBSD Foundation, Inc. 5 1.1.2.2 skrll * All rights reserved. 6 1.1.2.2 skrll * 7 1.1.2.2 skrll * This code is derived from software contributed to The NetBSD Foundation 8 1.1.2.2 skrll * by Christos Zoulas. 9 1.1.2.2 skrll * 10 1.1.2.2 skrll * Redistribution and use in source and binary forms, with or without 11 1.1.2.2 skrll * modification, are permitted provided that the following conditions 12 1.1.2.2 skrll * are met: 13 1.1.2.2 skrll * 1. Redistributions of source code must retain the above copyright 14 1.1.2.2 skrll * notice, this list of conditions and the following disclaimer. 15 1.1.2.2 skrll * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.2.2 skrll * notice, this list of conditions and the following disclaimer in the 17 1.1.2.2 skrll * documentation and/or other materials provided with the distribution. 18 1.1.2.2 skrll * 3. All advertising materials mentioning features or use of this software 19 1.1.2.2 skrll * must display the following acknowledgement: 20 1.1.2.2 skrll * This product includes software developed by the NetBSD 21 1.1.2.2 skrll * Foundation, Inc. and its contributors. 22 1.1.2.2 skrll * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.1.2.2 skrll * contributors may be used to endorse or promote products derived 24 1.1.2.2 skrll * from this software without specific prior written permission. 25 1.1.2.2 skrll * 26 1.1.2.2 skrll * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.1.2.2 skrll * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.1.2.2 skrll * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.1.2.2 skrll * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.1.2.2 skrll * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.1.2.2 skrll * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.1.2.2 skrll * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.1.2.2 skrll * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.1.2.2 skrll * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.1.2.2 skrll * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.1.2.2 skrll * POSSIBILITY OF SUCH DAMAGE. 37 1.1.2.2 skrll */ 38 1.1.2.2 skrll 39 1.1.2.2 skrll #include <sys/cdefs.h> 40 1.1.2.2 skrll __KERNEL_RCSID(0, "$NetBSD: linux_exec_machdep.c,v 1.1.2.2 2004/11/14 08:15:33 skrll Exp $"); 41 1.1.2.2 skrll 42 1.1.2.2 skrll #if defined(_KERNEL_OPT) 43 1.1.2.2 skrll #include "opt_vm86.h" 44 1.1.2.2 skrll #include "opt_user_ldt.h" 45 1.1.2.2 skrll #endif 46 1.1.2.2 skrll 47 1.1.2.2 skrll #include <sys/param.h> 48 1.1.2.2 skrll #include <sys/systm.h> 49 1.1.2.2 skrll #include <sys/resource.h> 50 1.1.2.2 skrll #include <sys/proc.h> 51 1.1.2.2 skrll #include <sys/conf.h> 52 1.1.2.2 skrll #include <sys/exec.h> 53 1.1.2.2 skrll #include <sys/exec_elf.h> 54 1.1.2.2 skrll #include <sys/vnode.h> 55 1.1.2.2 skrll #include <sys/lwp.h> 56 1.1.2.2 skrll 57 1.1.2.2 skrll #include <machine/cpu.h> 58 1.1.2.2 skrll #include <machine/vmparam.h> 59 1.1.2.2 skrll 60 1.1.2.2 skrll #include <uvm/uvm.h> 61 1.1.2.2 skrll 62 1.1.2.2 skrll #include <compat/linux/common/linux_types.h> 63 1.1.2.2 skrll #include <compat/linux/common/linux_signal.h> 64 1.1.2.2 skrll #include <compat/linux/common/linux_util.h> 65 1.1.2.2 skrll #include <compat/linux/common/linux_ioctl.h> 66 1.1.2.2 skrll #include <compat/linux/common/linux_hdio.h> 67 1.1.2.2 skrll #include <compat/linux/common/linux_exec.h> 68 1.1.2.2 skrll #include <compat/linux/common/linux_machdep.h> 69 1.1.2.2 skrll #include <compat/linux/common/linux_errno.h> 70 1.1.2.2 skrll 71 1.1.2.2 skrll int 72 1.1.2.2 skrll linux_exec_setup_stack(struct proc *p, struct exec_package *epp) 73 1.1.2.2 skrll { 74 1.1.2.2 skrll u_long max_stack_size; 75 1.1.2.2 skrll u_long access_linear_min, access_size; 76 1.1.2.2 skrll u_long noaccess_linear_min, noaccess_size; 77 1.1.2.2 skrll 78 1.1.2.2 skrll #ifndef USRSTACK32 79 1.1.2.2 skrll #define USRSTACK32 (0x00000000ffffffffL&~PGOFSET) 80 1.1.2.2 skrll #endif 81 1.1.2.2 skrll 82 1.1.2.2 skrll if (epp->ep_flags & EXEC_32) { 83 1.1.2.2 skrll epp->ep_minsaddr = USRSTACK32; 84 1.1.2.2 skrll max_stack_size = MAXSSIZ; 85 1.1.2.2 skrll } else { 86 1.1.2.2 skrll epp->ep_minsaddr = USRSTACK; 87 1.1.2.2 skrll max_stack_size = MAXSSIZ; 88 1.1.2.2 skrll } 89 1.1.2.2 skrll 90 1.1.2.2 skrll if (epp->ep_minsaddr > LINUX_USRSTACK) 91 1.1.2.2 skrll epp->ep_minsaddr = LINUX_USRSTACK; 92 1.1.2.2 skrll #ifdef DEBUG_LINUX 93 1.1.2.2 skrll else { 94 1.1.2.2 skrll /* 95 1.1.2.2 skrll * Someone needs to make KERNBASE and TEXTADDR 96 1.1.2.2 skrll * java versions < 1.4.2 need the stack to be 97 1.1.2.2 skrll * at 0xC0000000 98 1.1.2.2 skrll */ 99 1.1.2.2 skrll uprintf("Cannot setup stack to 0xC0000000, " 100 1.1.2.2 skrll "java will not work properly\n"); 101 1.1.2.2 skrll } 102 1.1.2.2 skrll #endif 103 1.1.2.2 skrll epp->ep_maxsaddr = (u_long)STACK_GROW(epp->ep_minsaddr, 104 1.1.2.2 skrll max_stack_size); 105 1.1.2.2 skrll epp->ep_ssize = p->p_rlimit[RLIMIT_STACK].rlim_cur; 106 1.1.2.2 skrll 107 1.1.2.2 skrll /* 108 1.1.2.2 skrll * set up commands for stack. note that this takes *two*, one to 109 1.1.2.2 skrll * map the part of the stack which we can access, and one to map 110 1.1.2.2 skrll * the part which we can't. 111 1.1.2.2 skrll * 112 1.1.2.2 skrll * arguably, it could be made into one, but that would require the 113 1.1.2.2 skrll * addition of another mapping proc, which is unnecessary 114 1.1.2.2 skrll */ 115 1.1.2.2 skrll access_size = epp->ep_ssize; 116 1.1.2.2 skrll access_linear_min = (u_long)STACK_ALLOC(epp->ep_minsaddr, access_size); 117 1.1.2.2 skrll noaccess_size = max_stack_size - access_size; 118 1.1.2.2 skrll noaccess_linear_min = (u_long)STACK_ALLOC(STACK_GROW(epp->ep_minsaddr, 119 1.1.2.2 skrll access_size), noaccess_size); 120 1.1.2.2 skrll if (noaccess_size > 0) { 121 1.1.2.2 skrll NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, noaccess_size, 122 1.1.2.2 skrll noaccess_linear_min, NULLVP, 0, VM_PROT_NONE); 123 1.1.2.2 skrll } 124 1.1.2.2 skrll KASSERT(access_size > 0); 125 1.1.2.2 skrll NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, access_size, 126 1.1.2.2 skrll access_linear_min, NULLVP, 0, VM_PROT_READ | VM_PROT_WRITE); 127 1.1.2.2 skrll 128 1.1.2.2 skrll return 0; 129 1.1.2.2 skrll } 130
Indexes created Tue Sep 30 11:09:46 GMT 2025