/* $NetBSD: compat_exec.c,v 1.17 2009/08/15 23:39:35 matt Exp $ */ /* * Copyright (c) 1993, 1994 Christopher G. Demetriou * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Christopher G. Demetriou. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include __KERNEL_RCSID(0, "$NetBSD: compat_exec.c,v 1.17 2009/08/15 23:39:35 matt Exp $"); #ifdef _KERNEL_OPT #include "opt_execfmt.h" #endif #include #include #include #include #include #include #ifdef EXEC_AOUT #include /* * exec_aout_prep_oldzmagic(): * Prepare the vmcmds to build a vmspace for an old ZMAGIC * binary. [386BSD/BSDI/4.4BSD/NetBSD0.8] * * Cloned from exec_aout_prep_zmagic() in kern/exec_aout.c; a more verbose * description of operation is there. * There were copies of this in the mac68k, hp300, and i386 ports. */ int exec_aout_prep_oldzmagic(struct lwp *l, struct exec_package *epp) { struct exec *execp = epp->ep_hdr; int error; epp->ep_taddr = 0; epp->ep_tsize = execp->a_text; epp->ep_daddr = epp->ep_taddr + execp->a_text; epp->ep_dsize = execp->a_data + execp->a_bss; epp->ep_entry = execp->a_entry; error = vn_marktext(epp->ep_vp); if (error) return (error); /* set up command for text segment */ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text, epp->ep_taddr, epp->ep_vp, PAGE_SIZE, /* XXX CLBYTES? */ VM_PROT_READ|VM_PROT_EXECUTE); /* set up command for data segment */ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data, epp->ep_daddr, epp->ep_vp, execp->a_text + PAGE_SIZE, /* XXX CLBYTES? */ VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); /* set up command for bss segment */ if (execp->a_bss) NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss, epp->ep_daddr + execp->a_data, NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); return (*epp->ep_esch->es_setup_stack)(l, epp); } /* * exec_aout_prep_oldnmagic(): * Prepare the vmcmds to build a vmspace for an old NMAGIC * binary. [BSDI] * * Cloned from exec_aout_prep_nmagic() in kern/exec_aout.c; with text starting * at 0. * XXX: There must be a better way to share this code. */ int exec_aout_prep_oldnmagic(struct lwp *l, struct exec_package *epp) { struct exec *execp = epp->ep_hdr; long bsize, baddr; epp->ep_taddr = 0; epp->ep_tsize = execp->a_text; epp->ep_daddr = roundup(epp->ep_taddr + execp->a_text, AOUT_LDPGSZ); epp->ep_dsize = execp->a_data + execp->a_bss; epp->ep_entry = execp->a_entry; /* set up command for text segment */ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text, epp->ep_taddr, epp->ep_vp, sizeof(struct exec), VM_PROT_READ|VM_PROT_EXECUTE); /* set up command for data segment */ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data, epp->ep_daddr, epp->ep_vp, execp->a_text + sizeof(struct exec), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); /* set up command for bss segment */ baddr = roundup(epp->ep_daddr + execp->a_data, PAGE_SIZE); bsize = epp->ep_daddr + epp->ep_dsize - baddr; if (bsize > 0) NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); return (*epp->ep_esch->es_setup_stack)(l, epp); } /* * exec_aout_prep_oldomagic(): * Prepare the vmcmds to build a vmspace for an old OMAGIC * binary. [BSDI] * * Cloned from exec_aout_prep_omagic() in kern/exec_aout.c; with text starting * at 0. * XXX: There must be a better way to share this code. */ int exec_aout_prep_oldomagic(struct lwp *l, struct exec_package *epp) { struct exec *execp = epp->ep_hdr; long dsize, bsize, baddr; epp->ep_taddr = 0; epp->ep_tsize = execp->a_text; epp->ep_daddr = epp->ep_taddr + execp->a_text; epp->ep_dsize = execp->a_data + execp->a_bss; epp->ep_entry = execp->a_entry; /* set up command for text and data segments */ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp, sizeof(struct exec), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); /* set up command for bss segment */ baddr = roundup(epp->ep_daddr + execp->a_data, PAGE_SIZE); bsize = epp->ep_daddr + epp->ep_dsize - baddr; if (bsize > 0) NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); /* * Make sure (# of pages) mapped above equals (vm_tsize + vm_dsize); * obreak(2) relies on this fact. Both `vm_tsize' and `vm_dsize' are * computed (in execve(2)) by rounding *up* `ep_tsize' and `ep_dsize' * respectively to page boundaries. * Compensate `ep_dsize' for the amount of data covered by the last * text page. */ dsize = epp->ep_dsize + execp->a_text - roundup(execp->a_text, PAGE_SIZE); epp->ep_dsize = (dsize > 0) ? dsize : 0; return (*epp->ep_esch->es_setup_stack)(l, epp); } #endif /* EXEC_AOUT */