234 lines
5.7 KiB
C
234 lines
5.7 KiB
C
/* $NetBSD: linux32_exec_elf32.c,v 1.12 2010/09/11 20:49:28 chs Exp $ */
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/*-
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* Copyright (c) 1995, 1998, 2000, 2001,2006 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Christos Zoulas, Frank van der Linden, Eric Haszlakiewicz and
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* Emmanuel Dreyfus.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: linux32_exec_elf32.c,v 1.12 2010/09/11 20:49:28 chs Exp $");
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#define ELFSIZE 32
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/malloc.h>
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#include <sys/vnode.h>
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#include <sys/exec.h>
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#include <sys/exec_elf.h>
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#include <sys/kauth.h>
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#include <sys/kernel.h>
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#include <sys/resourcevar.h>
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#include <sys/signal.h>
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#include <sys/signalvar.h>
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#include <compat/linux/common/linux_exec.h>
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#include <compat/netbsd32/netbsd32.h>
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#include <compat/netbsd32/netbsd32_exec.h>
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#include <compat/linux32/common/linux32_exec.h>
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#include <machine/cpuvar.h>
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#include <machine/frame.h>
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#ifdef DEBUG_LINUX
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#define DPRINTF(a) uprintf a
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#else
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#define DPRINTF(a)
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#endif
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int linux32_copyinargs(struct exec_package *, struct ps_strings *,
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void *, size_t, const void *, const void *);
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int
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ELFNAME2(linux32,probe)(struct lwp *l, struct exec_package *epp,
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void *eh, char *itp, vaddr_t *pos)
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{
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int error;
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if (((error = ELFNAME2(linux,signature)(l, epp, eh, itp)) != 0) &&
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#ifdef LINUX32_GCC_SIGNATURE
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((error = ELFNAME2(linux,gcc_signature)(l, epp, eh)) != 0) &&
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#endif
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#ifdef LINUX32_ATEXIT_SIGNATURE
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((error = ELFNAME2(linux,atexit_signature)(l, epp, eh)) != 0) &&
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#endif
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#ifdef LINUX32_DEBUGLINK_SIGNATURE
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((error = ELFNAME2(linux,debuglink_signature)(l, epp, eh)) != 0) &&
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#endif
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1)
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return error;
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if (itp) {
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if ((error = emul_find_interp(l, epp, itp)))
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return (error);
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}
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#if 0
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DPRINTF(("linux32_probe: returning 0\n"));
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#endif
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epp->ep_flags |= EXEC_32 | EXEC_FORCEAUX;
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epp->ep_vm_minaddr = VM_MIN_ADDRESS;
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epp->ep_vm_maxaddr = USRSTACK32;
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return 0;
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}
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/*
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* Copy arguments onto the stack in the normal way, but add some
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* extra information in case of dynamic binding.
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*/
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int
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linux32_elf32_copyargs(struct lwp *l, struct exec_package *pack,
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struct ps_strings *arginfo, char **stackp, void *argp)
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{
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Aux32Info ai[LINUX32_ELF_AUX_ENTRIES], *a;
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struct elf_args *ap;
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struct vattr *vap;
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size_t len;
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int error;
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if ((error = netbsd32_copyargs(l, pack, arginfo, stackp, argp)) != 0)
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return error;
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a = ai;
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/*
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* Push extra arguments on the stack needed by dynamically
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* linked binaries and static binaries as well.
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*/
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a->a_type = AT_PAGESZ;
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a->a_v = PAGE_SIZE;
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a++;
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if ((ap = (struct elf_args *)pack->ep_emul_arg)) {
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a->a_type = AT_PHDR;
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a->a_v = ap->arg_phaddr;
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a++;
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a->a_type = AT_PHENT;
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a->a_v = ap->arg_phentsize;
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a++;
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a->a_type = AT_PHNUM;
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a->a_v = ap->arg_phnum;
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a++;
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a->a_type = AT_BASE;
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a->a_v = ap->arg_interp;
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a++;
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a->a_type = AT_FLAGS;
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a->a_v = 0;
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a++;
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a->a_type = AT_ENTRY;
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a->a_v = ap->arg_entry;
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a++;
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free(ap, M_TEMP);
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pack->ep_emul_arg = NULL;
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}
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/* Linux-specific items */
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a->a_type = LINUX_AT_CLKTCK;
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a->a_v = hz;
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a++;
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vap = pack->ep_vap;
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a->a_type = LINUX_AT_UID;
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a->a_v = kauth_cred_getuid(l->l_cred);
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a++;
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a->a_type = LINUX_AT_EUID;
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a->a_v = ((vap->va_mode & S_ISUID) ?
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vap->va_uid : kauth_cred_geteuid(l->l_cred));
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a++;
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a->a_type = LINUX_AT_GID;
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a->a_v = kauth_cred_getgid(l->l_cred);
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a++;
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a->a_type = LINUX_AT_EGID;
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a->a_v = ((vap->va_mode & S_ISGID) ?
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vap->va_gid : kauth_cred_getegid(l->l_cred));
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a++;
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a->a_type = LINUX_AT_SECURE;
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a->a_v = 0;
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a++;
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#if 0
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a->a_type = LINUX_AT_SYSINFO;
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a->a_v = NETBSD32PTR32I(&esdp->kernel_vsyscall[0]);
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a++;
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a->a_type = LINUX_AT_SYSINFO_EHDR;
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a->a_v = NETBSD32PTR32I(&esdp->elfhdr);
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a++;
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a->a_type = LINUX_AT_HWCAP;
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a->a_v = LINUX32_CPUCAP;
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a++;
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a->a_type = LINUX_AT_PLATFORM;
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a->a_v = NETBSD32PTR32I(&esdp->hw_platform[0]);
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a++;
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#endif
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a->a_type = AT_NULL;
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a->a_v = 0;
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a++;
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#if 0
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memcpy(esd.kernel_vsyscall, linux32_kernel_vsyscall,
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sizeof(linux32_kernel_vsyscall));
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memcpy(&esd.elfhdr, eh, sizeof(*eh));
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strcpy(esd.hw_platform, LINUX32_PLATFORM);
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/*
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* Copy out the ELF auxiliary table and hw platform name
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*/
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if ((error = copyout(&esd, esdp, sizeof(esd))) != 0)
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return error;
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*stackp += sizeof(esd);
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#endif
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len = (a - ai) * sizeof(AuxInfo);
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if ((error = copyout(ai, *stackp, len)) != 0)
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return error;
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*stackp += len;
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return 0;
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}
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