235 lines
7.1 KiB
C
235 lines
7.1 KiB
C
/*
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* Copyright (c) 1993 Christopher G. Demetriou
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* All rights reserved.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Christopher G. Demetriou.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software withough specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* from: Id: exec_aout.c,v 1.1.2.5 1993/10/17 04:29:26 deraadt Exp
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* $Id: sun_exec_aout.c,v 1.2 1993/11/20 03:05:41 deraadt Exp $
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/filedesc.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/mount.h>
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#include <sys/malloc.h>
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#include <sys/namei.h>
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#include <sys/vnode.h>
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#include <sys/file.h>
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#include <sys/exec.h>
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#include <sys/resourcevar.h>
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#include <sys/wait.h>
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#include <machine/cpu.h>
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#include <machine/reg.h>
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#include <machine/exec.h>
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#include <sys/mman.h>
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#include <vm/vm.h>
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#include <sys/vm/vm_param.h>
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#include <sys/vm/vm_map.h>
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#include <sys/vm/vm_kern.h>
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#include <sys/vm/vm_pager.h>
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/*
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* define some macros usually in <a.out.h> that come in handy later.
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*
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* NOTE: This is the only thing different than what's in
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* kern/exec_aout.c ! Perhaps the two files could merge somehow?
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*/
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/* suns keep data seg aligned to SEGSIZ because of sun custom mmu */
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#define SEGSIZ 0x20000
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#define N_TXTADDR(x,m) __LDPGSZ
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#define N_DATADDR(x,m) (((m)==OMAGIC) ? (N_TXTADDR(x,m) + (x).a_text) \
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: (SEGSIZ + ((N_TXTADDR(x,m) + (x).a_text - 1) \
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& ~(SEGSIZ-1))))
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#define N_BSSADDR(x,m) (N_DATADDR(x,m)+(x).a_data)
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#define N_TXTOFF(x,m) ((m)==ZMAGIC ? 0 : sizeof (struct exec))
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#define N_DATOFF(x,m) (N_TXTOFF(x,m) + (x).a_text)
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/*
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* sun_exec_aout_prep_zmagic(): Prepare a SunOS ZMAGIC binary's exec package
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*
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* First, set of the various offsets/lengths in the exec package.
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*
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* Then, mark the text image busy (so it can be demand paged) or error
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* out if this is not possible. Finally, set up vmcmds for the
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* text, data, bss, and stack segments.
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*/
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int
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sun_exec_aout_prep_zmagic(p, epp)
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struct proc *p;
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struct exec_package *epp;
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{
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struct exec *execp = epp->ep_execp;
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struct exec_vmcmd *ccmdp;
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epp->ep_taddr = N_TXTADDR (*execp, ZMAGIC);
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epp->ep_tsize = execp->a_text;
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epp->ep_daddr = N_DATADDR (*execp, ZMAGIC);
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epp->ep_dsize = execp->a_data + execp->a_bss;
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epp->ep_entry = execp->a_entry;
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/*
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* check if vnode is in open for writing, because we want to
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* demand-page out of it. if it is, don't do it, for various
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* reasons
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*/
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if ((execp->a_text != 0 || execp->a_data != 0) &&
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(epp->ep_vp->v_flag & VTEXT) == 0 && epp->ep_vp->v_writecount != 0) {
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#ifdef DIAGNOSTIC
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if (epp->ep_vp->v_flag & VTEXT)
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panic("exec: a VTEXT vnode has writecount != 0\n");
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#endif
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epp->ep_vcp = NULL;
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return ETXTBSY;
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}
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epp->ep_vp->v_flag |= VTEXT;
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/* set up command for text segment */
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epp->ep_vcp = new_vmcmd(vmcmd_map_pagedvn,
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execp->a_text,
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epp->ep_taddr,
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epp->ep_vp,
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N_TXTOFF(*execp, ZMAGIC),
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VM_PROT_READ | VM_PROT_EXECUTE);
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ccmdp = epp->ep_vcp;
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/* set up command for data segment */
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ccmdp->ev_next = new_vmcmd(vmcmd_map_pagedvn,
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execp->a_data,
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epp->ep_daddr,
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epp->ep_vp,
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N_DATOFF(*execp, ZMAGIC),
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VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE);
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ccmdp = ccmdp->ev_next;
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/* set up command for bss segment */
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ccmdp->ev_next = new_vmcmd(vmcmd_map_zero,
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execp->a_bss,
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epp->ep_daddr + execp->a_data,
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0,
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0,
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VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE);
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ccmdp = ccmdp->ev_next;
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return exec_aout_setup_stack(p, epp, ccmdp);
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}
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/*
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* sun_exec_aout_prep_nmagic(): Prepare a SunOS NMAGIC binary's exec package
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*/
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int
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sun_exec_aout_prep_nmagic(p, epp)
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struct proc *p;
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struct exec_package *epp;
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{
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struct exec *execp = epp->ep_execp;
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struct exec_vmcmd *ccmdp;
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long bsize, baddr;
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epp->ep_taddr = N_TXTADDR(*execp, NMAGIC);
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epp->ep_tsize = execp->a_text;
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epp->ep_daddr = N_DATADDR(*execp, NMAGIC);
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epp->ep_dsize = execp->a_data + execp->a_bss;
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epp->ep_entry = execp->a_entry;
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/* set up command for text segment */
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epp->ep_vcp = new_vmcmd(vmcmd_map_readvn,
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execp->a_text,
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epp->ep_taddr,
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epp->ep_vp,
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N_TXTOFF(*execp, NMAGIC),
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VM_PROT_READ | VM_PROT_EXECUTE);
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ccmdp = epp->ep_vcp;
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/* set up command for data segment */
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ccmdp->ev_next = new_vmcmd(vmcmd_map_readvn,
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execp->a_data,
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epp->ep_daddr,
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epp->ep_vp,
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N_DATOFF(*execp, NMAGIC),
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VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE);
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ccmdp = ccmdp->ev_next;
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/* set up command for bss segment */
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baddr = roundup(epp->ep_daddr + execp->a_data, NBPG);
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bsize = epp->ep_daddr + epp->ep_dsize - baddr;
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if (bsize > 0) {
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ccmdp->ev_next = new_vmcmd(vmcmd_map_zero, bsize, baddr,
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0, 0, VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE);
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ccmdp = ccmdp->ev_next;
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}
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return exec_aout_setup_stack(p, epp, ccmdp);
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}
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/*
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* sun_exec_aout_prep_omagic(): Prepare a SunOS OMAGIC binary's exec package
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*/
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int
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sun_exec_aout_prep_omagic(p, epp)
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struct proc *p;
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struct exec_package *epp;
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{
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struct exec *execp = epp->ep_execp;
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struct exec_vmcmd *ccmdp;
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long bsize, baddr;
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epp->ep_taddr = N_TXTADDR(*execp, OMAGIC);
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epp->ep_tsize = execp->a_text;
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epp->ep_daddr = N_DATADDR(*execp, OMAGIC);
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epp->ep_dsize = execp->a_data + execp->a_bss;
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epp->ep_entry = execp->a_entry;
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/* set up command for text and data segments */
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epp->ep_vcp = new_vmcmd(vmcmd_map_readvn,
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execp->a_text + execp->a_data,
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epp->ep_taddr,
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epp->ep_vp,
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N_TXTOFF(*execp, OMAGIC),
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VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE);
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ccmdp = epp->ep_vcp;
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/* set up command for bss segment */
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baddr = roundup(epp->ep_daddr + execp->a_data, __LDPGSZ);
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bsize = epp->ep_daddr + epp->ep_dsize - baddr;
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if (bsize > 0) {
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ccmdp->ev_next = new_vmcmd(vmcmd_map_zero, bsize, baddr,
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0, 0, VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE);
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ccmdp = ccmdp->ev_next;
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}
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return exec_aout_setup_stack(p, epp, ccmdp);
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}
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