NetBSD-5.0.2/sys/arch/sh3/sh3/coff_exec.c
/* $NetBSD: coff_exec.c,v 1.30 2008/02/25 08:31:00 dholland Exp $ */
/*
* Copyright (c) 1994, 1995 Scott Bartram
* Copyright (c) 1994 Adam Glass
* Copyright (c) 1993, 1994 Christopher G. Demetriou
* All rights reserved.
*
* originally from kern/exec_ecoff.c
*
* 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 Scott Bartram.
* 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 <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: coff_exec.c,v 1.30 2008/02/25 08:31:00 dholland Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/exec.h>
#include <sys/malloc.h>
#include <sys/vnode.h>
#include <sys/resourcevar.h>
#include <sys/namei.h>
#include <uvm/uvm_extern.h>
#include <sys/exec_coff.h>
static int coff_find_section(struct lwp *, struct vnode *,
struct coff_filehdr *, struct coff_scnhdr *, int);
/*
* exec_coff_makecmds(): Check if it's an coff-format executable.
*
* Given a lwp pointer and an exec package pointer, see if the referent
* of the epp is in coff format. Check 'standard' magic numbers for
* this architecture. If that fails, return failure.
*
* This function is responsible for creating a set of vmcmds which can be
* used to build the process's vm space and inserting them into the exec
* package.
*/
int
exec_coff_makecmds(struct lwp *l, struct exec_package *epp)
{
int error;
struct coff_filehdr *fp = epp->ep_hdr;
struct coff_aouthdr *ap;
if (epp->ep_hdrvalid < COFF_HDR_SIZE)
return ENOEXEC;
if (COFF_BADMAG(fp))
return ENOEXEC;
ap = (void *)((char *)epp->ep_hdr + sizeof(struct coff_filehdr));
switch (ap->a_magic) {
case COFF_OMAGIC:
error = exec_coff_prep_omagic(l, epp, fp, ap);
break;
case COFF_NMAGIC:
error = exec_coff_prep_nmagic(l, epp, fp, ap);
break;
case COFF_ZMAGIC:
error = exec_coff_prep_zmagic(l, epp, fp, ap);
break;
default:
return ENOEXEC;
}
#ifdef TODO
if (error == 0)
error = cpu_exec_coff_hook(p, epp);
#endif
if (error)
kill_vmcmds(&epp->ep_vmcmds);
return error;
}
/*
* exec_coff_prep_omagic(): Prepare a COFF OMAGIC binary's exec package
*/
int
exec_coff_prep_omagic(struct lwp *l, struct exec_package *epp,
struct coff_filehdr *fp, struct coff_aouthdr *ap)
{
epp->ep_taddr = COFF_SEGMENT_ALIGN(fp, ap, ap->a_tstart);
epp->ep_tsize = ap->a_tsize;
epp->ep_daddr = COFF_SEGMENT_ALIGN(fp, ap, ap->a_dstart);
epp->ep_dsize = ap->a_dsize;
epp->ep_entry = ap->a_entry;
/* set up command for text and data segments */
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
ap->a_tsize + ap->a_dsize, epp->ep_taddr, epp->ep_vp,
COFF_TXTOFF(fp, ap),
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
/* set up command for bss segment */
#ifdef __sh__
if (ap->a_bsize > 0)
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, ap->a_bsize,
COFF_ROUND(ap->a_dstart + ap->a_dsize, COFF_LDPGSZ),
NULLVP, 0,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
#else
if (ap->a_bsize > 0)
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, ap->a_bsize,
COFF_SEGMENT_ALIGN(fp, ap,
ap->a_dstart + ap->a_dsize),
NULLVP, 0,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
#endif
return (*epp->ep_esch->es_setup_stack)(l, epp);
}
/*
* exec_coff_prep_nmagic(): Prepare a 'native' NMAGIC COFF binary's exec
* package.
*/
int
exec_coff_prep_nmagic(l, epp, fp, ap)
struct lwp *l;
struct exec_package *epp;
struct coff_filehdr *fp;
struct coff_aouthdr *ap;
{
epp->ep_taddr = COFF_SEGMENT_ALIGN(fp, ap, ap->a_tstart);
epp->ep_tsize = ap->a_tsize;
epp->ep_daddr = COFF_ROUND(ap->a_dstart, COFF_LDPGSZ);
epp->ep_dsize = ap->a_dsize;
epp->ep_entry = ap->a_entry;
/* set up command for text segment */
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, epp->ep_tsize,
epp->ep_taddr, epp->ep_vp, COFF_TXTOFF(fp, ap),
VM_PROT_READ|VM_PROT_EXECUTE);
/* set up command for data segment */
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, epp->ep_dsize,
epp->ep_daddr, epp->ep_vp, COFF_DATOFF(fp, ap),
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
/* set up command for bss segment */
if (ap->a_bsize > 0)
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, ap->a_bsize,
COFF_SEGMENT_ALIGN(fp, ap,
ap->a_dstart + ap->a_dsize),
NULLVP, 0,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
return (*epp->ep_esch->es_setup_stack)(l, epp);
}
/*
* coff_find_section - load specified section header
*
* TODO - optimize by reading all section headers in at once
*/
static int
coff_find_section(struct lwp *l, struct vnode *vp, struct coff_filehdr *fp,
struct coff_scnhdr *sh, int s_type)
{
int i, pos, error;
size_t siz, resid;
pos = COFF_HDR_SIZE;
for (i = 0; i < fp->f_nscns; i++, pos += sizeof(struct coff_scnhdr)) {
siz = sizeof(struct coff_scnhdr);
error = vn_rdwr(UIO_READ, vp, (void *) sh,
siz, pos, UIO_SYSSPACE, IO_NODELOCKED, l->l_cred,
&resid, NULL);
if (error) {
DPRINTF(("section hdr %d read error %d\n", i, error));
return error;
}
siz -= resid;
if (siz != sizeof(struct coff_scnhdr)) {
DPRINTF(("incomplete read: hdr %d ask=%d, rem=%zu got %zu\n",
s_type, sizeof(struct coff_scnhdr),
resid, siz));
return ENOEXEC;
}
DPRINTF(("found section: %lu\n", sh->s_flags));
if (sh->s_flags == s_type)
return 0;
}
return ENOEXEC;
}
/*
* exec_coff_prep_zmagic(): Prepare a COFF ZMAGIC binary's exec package
*
* First, set the various offsets/lengths in the exec package.
*
* Then, mark the text image busy (so it can be demand paged) or error
* out if this is not possible. Finally, set up vmcmds for the
* text, data, bss, and stack segments.
*/
int
exec_coff_prep_zmagic(struct lwp *l, struct exec_package *epp,
struct coff_filehdr *fp, struct coff_aouthdr *ap)
{
int error;
u_long offset;
long dsize;
#ifndef __sh__
long baddr, bsize;
#endif
struct coff_scnhdr sh;
DPRINTF(("enter exec_coff_prep_zmagic\n"));
/* set up command for text segment */
error = coff_find_section(l, epp->ep_vp, fp, &sh, COFF_STYP_TEXT);
if (error) {
DPRINTF(("can't find text section: %d\n", error));
return error;
}
DPRINTF(("COFF text addr %lu size %ld offset %ld\n", sh.s_vaddr,
sh.s_size, sh.s_scnptr));
epp->ep_taddr = COFF_ALIGN(sh.s_vaddr);
offset = sh.s_scnptr - (sh.s_vaddr - epp->ep_taddr);
epp->ep_tsize = sh.s_size + (sh.s_vaddr - epp->ep_taddr);
error = vn_marktext(epp->ep_vp);
if (error)
return (error);
DPRINTF(("VMCMD: addr %lx size %lx offset %lx\n", epp->ep_taddr,
epp->ep_tsize, offset));
if (!(offset & PAGE_MASK) && !(epp->ep_taddr & PAGE_MASK)) {
epp->ep_tsize = round_page(epp->ep_tsize);
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, epp->ep_tsize,
epp->ep_taddr, epp->ep_vp, offset,
VM_PROT_READ|VM_PROT_EXECUTE);
} else {
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, epp->ep_tsize,
epp->ep_taddr, epp->ep_vp, offset,
VM_PROT_READ|VM_PROT_EXECUTE);
}
/* set up command for data segment */
error = coff_find_section(l, epp->ep_vp, fp, &sh, COFF_STYP_DATA);
if (error) {
DPRINTF(("can't find data section: %d\n", error));
return error;
}
DPRINTF(("COFF data addr %lx size %ld offset %ld\n", sh.s_vaddr,
sh.s_size, sh.s_scnptr));
epp->ep_daddr = COFF_ALIGN(sh.s_vaddr);
offset = sh.s_scnptr - (sh.s_vaddr - epp->ep_daddr);
dsize = sh.s_size + (sh.s_vaddr - epp->ep_daddr);
#ifdef __sh__
epp->ep_dsize = round_page(dsize) + ap->a_bsize;
#else
epp->ep_dsize = dsize + ap->a_bsize;
#endif
DPRINTF(("VMCMD: addr %lx size %lx offset %lx\n", epp->ep_daddr,
dsize, offset));
if (!(offset & PAGE_MASK) && !(epp->ep_daddr & PAGE_MASK)) {
dsize = round_page(dsize);
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, dsize,
epp->ep_daddr, epp->ep_vp, offset,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
} else {
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
dsize, epp->ep_daddr, epp->ep_vp, offset,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
}
#ifdef __sh__
if (ap->a_bsize > 0) {
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, ap->a_bsize,
COFF_ROUND(ap->a_dstart + ap->a_dsize, COFF_LDPGSZ),
NULLVP, 0,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
}
#else
/* set up command for bss segment */
baddr = round_page(epp->ep_daddr + dsize);
bsize = epp->ep_daddr + epp->ep_dsize - baddr;
if (bsize > 0) {
DPRINTF(("VMCMD: addr %x size %x offset %x\n",
baddr, bsize, 0));
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero,
bsize, baddr, NULLVP, 0,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
}
#endif
#ifdef TODO
/* load any shared libraries */
error = coff_find_section(l, epp->ep_vp, fp, &sh, COFF_STYP_SHLIB);
if (!error) {
size_t resid;
struct coff_slhdr *slhdr;
char buf[128], *bufp; /* FIXME */
int len = sh.s_size, path_index, entry_len;
DPRINTF(("COFF shlib size %d offset %d\n",
sh.s_size, sh.s_scnptr));
error = vn_rdwr(UIO_READ, epp->ep_vp, (void *) buf,
len, sh.s_scnptr,
UIO_SYSSPACE, IO_NODELOCKED, l->l_cred,
&resid, NULL);
if (error) {
DPRINTF(("shlib section read error %d\n", error));
return ENOEXEC;
}
bufp = buf;
while (len) {
slhdr = (struct coff_slhdr *)bufp;
path_index = slhdr->path_index * sizeof(long);
entry_len = slhdr->entry_len * sizeof(long);
DPRINTF(("path_index: %d entry_len: %d name: %s\n",
path_index, entry_len, slhdr->sl_name));
error = coff_load_shlib(p, slhdr->sl_name, epp);
if (error)
return ENOEXEC;
bufp += entry_len;
len -= entry_len;
}
}
#endif
/* set up entry point */
epp->ep_entry = ap->a_entry;
#if 1
DPRINTF(("text addr: %lx size: %ld data addr: %lx size: %ld entry: %lx\n",
epp->ep_taddr, epp->ep_tsize,
epp->ep_daddr, epp->ep_dsize,
epp->ep_entry));
#endif
return (*epp->ep_esch->es_setup_stack)(l, epp);
}
#if 0
int
coff_load_shlib(struct lwp *l, char *path, struct exec_package *epp)
{
int error;
size_t siz, resid;
int taddr, tsize, daddr, dsize, offset;
struct nameidata nd;
struct coff_filehdr fh, *fhp = &fh;
struct coff_scnhdr sh, *shp = &sh;
/*
* 1. open shlib file
* 2. read filehdr
* 3. map text, data, and bss out of it using VM_*
*/
NDINIT(&nd, LOOKUP, FOLLOW | TRYEMULROOT, UIO_SYSSPACE, path);
/* first get the vnode */
if ((error = namei(&nd)) != 0) {
DPRINTF(("coff_load_shlib: can't find library %s\n", path));
return error;
}
siz = sizeof(struct coff_filehdr);
error = vn_rdwr(UIO_READ, nd.ni_vp, (void *) fhp, siz, 0,
UIO_SYSSPACE, IO_NODELOCKED, l->l_cred, &resid, NULL);
if (error) {
DPRINTF(("filehdr read error %d\n", error));
vrele(nd.ni_vp);
return error;
}
siz -= resid;
if (siz != sizeof(struct coff_filehdr)) {
DPRINTF(("coff_load_shlib: incomplete read: ask=%d, rem=%zu got %zu\n",
sizeof(struct coff_filehdr), resid, siz));
vrele(nd.ni_vp);
return ENOEXEC;
}
/* load text */
error = coff_find_section(l, nd.ni_vp, fhp, shp, COFF_STYP_TEXT);
if (error) {
DPRINTF(("can't find shlib text section\n"));
vrele(nd.ni_vp);
return error;
}
DPRINTF(("COFF text addr %x size %d offset %d\n", sh.s_vaddr,
sh.s_size, sh.s_scnptr));
taddr = COFF_ALIGN(shp->s_vaddr);
offset = shp->s_scnptr - (shp->s_vaddr - taddr);
tsize = shp->s_size + (shp->s_vaddr - taddr);
DPRINTF(("VMCMD: addr %x size %x offset %x\n", taddr, tsize, offset));
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, tsize, taddr,
nd.ni_vp, offset,
VM_PROT_READ|VM_PROT_EXECUTE);
/* load data */
error = coff_find_section(l, nd.ni_vp, fhp, shp, COFF_STYP_DATA);
if (error) {
DPRINTF(("can't find shlib data section\n"));
vrele(nd.ni_vp);
return error;
}
DPRINTF(("COFF data addr %x size %d offset %d\n", shp->s_vaddr,
shp->s_size, shp->s_scnptr));
daddr = COFF_ALIGN(shp->s_vaddr);
offset = shp->s_scnptr - (shp->s_vaddr - daddr);
dsize = shp->s_size + (shp->s_vaddr - daddr);
/* epp->ep_dsize = dsize + ap->a_bsize; */
DPRINTF(("VMCMD: addr %x size %x offset %x\n", daddr, dsize, offset));
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
dsize, daddr, nd.ni_vp, offset,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
/* load bss */
error = coff_find_section(l, nd.ni_vp, fhp, shp, COFF_STYP_BSS);
if (!error) {
int baddr = round_page(daddr + dsize);
int bsize = daddr + dsize + shp->s_size - baddr;
if (bsize > 0) {
DPRINTF(("VMCMD: addr %x size %x offset %x\n",
baddr, bsize, 0));
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero,
bsize, baddr, NULLVP, 0,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
}
}
vrele(nd.ni_vp);
return 0;
}
#endif