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NetBSD/sys/compat/ibcs2/ibcs2_exec.c

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/* $NetBSD: ibcs2_exec.c,v 1.15 1998/03/05 04:36:07 scottb Exp $ */
/*
* Copyright (c) 1994, 1995, 1998 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.
*/
#define ELFSIZE 32
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/malloc.h>
#include <sys/namei.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/exec.h>
#include <sys/exec_elf.h>
#include <sys/resourcevar.h>
#ifdef IBCS2_DEBUG
#include <sys/syslog.h>
#endif
#include <sys/mman.h>
#include <sys/syscallargs.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/vm_map.h>
#include <machine/cpu.h>
#include <machine/reg.h>
#include <machine/ibcs2_machdep.h>
#include <compat/ibcs2/ibcs2_types.h>
#include <compat/ibcs2/ibcs2_exec.h>
#include <compat/ibcs2/ibcs2_util.h>
#include <compat/ibcs2/ibcs2_syscall.h>
#define IBCS2_ELF_AUX_ARGSIZ (sizeof(AuxInfo) * 8 / sizeof(char *))
int exec_ibcs2_coff_prep_omagic __P((struct proc *, struct exec_package *,
struct coff_filehdr *,
struct coff_aouthdr *));
int exec_ibcs2_coff_prep_nmagic __P((struct proc *, struct exec_package *,
struct coff_filehdr *,
struct coff_aouthdr *));
int exec_ibcs2_coff_prep_zmagic __P((struct proc *, struct exec_package *,
struct coff_filehdr *,
struct coff_aouthdr *));
int exec_ibcs2_coff_setup_stack __P((struct proc *, struct exec_package *));
void cpu_exec_ibcs2_coff_setup __P((int, struct proc *, struct exec_package *,
void *));
int exec_ibcs2_xout_prep_nmagic __P((struct proc *, struct exec_package *,
struct xexec *, struct xext *));
int exec_ibcs2_xout_prep_zmagic __P((struct proc *, struct exec_package *,
struct xexec *, struct xext *));
int exec_ibcs2_xout_setup_stack __P((struct proc *, struct exec_package *));
int coff_load_shlib __P((struct proc *, char *, struct exec_package *));
static int coff_find_section __P((struct proc *, struct vnode *,
struct coff_filehdr *, struct coff_scnhdr *,
int));
static int ibcs2_elf32_signature __P((struct proc *p, struct exec_package *,
Elf32_Ehdr *));
extern int bsd2ibcs_errno[];
extern struct sysent ibcs2_sysent[];
extern char *ibcs2_syscallnames[];
extern char ibcs2_sigcode[], ibcs2_esigcode[];
const char ibcs2_emul_path[] = "/emul/ibcs2";
struct emul emul_ibcs2_coff = {
"ibcs2",
bsd2ibcs_errno,
ibcs2_sendsig,
0,
IBCS2_SYS_MAXSYSCALL,
ibcs2_sysent,
ibcs2_syscallnames,
0,
copyargs,
ibcs2_setregs,
ibcs2_sigcode,
ibcs2_esigcode,
};
struct emul emul_ibcs2_xout = {
"ibcs2",
bsd2ibcs_errno,
ibcs2_sendsig,
0,
IBCS2_SYS_MAXSYSCALL,
ibcs2_sysent,
ibcs2_syscallnames,
0,
copyargs,
ibcs2_setregs,
ibcs2_sigcode,
ibcs2_esigcode,
};
struct emul emul_ibcs2_elf = {
"ibcs2",
bsd2ibcs_errno,
ibcs2_sendsig,
0,
IBCS2_SYS_MAXSYSCALL,
ibcs2_sysent,
ibcs2_syscallnames,
IBCS2_ELF_AUX_ARGSIZ,
elf32_copyargs,
ibcs2_setregs,
ibcs2_sigcode,
ibcs2_esigcode,
};
/*
* The SCO compiler adds the string "SCO" to the .notes section of all
* binaries I've seen so far.
*
* XXX - probably should only compare the id in the actual ELF notes struct
*/
#define SCO_SIGNATURE "\004\0\0\0\014\0\0\0\001\0\0\0SCO\0"
static int
ibcs2_elf32_signature(p, epp, eh)
struct proc *p;
struct exec_package *epp;
Elf32_Ehdr *eh;
{
size_t shsize = sizeof(Elf32_Shdr) * eh->e_shnum;
size_t i;
static const char signature[] = SCO_SIGNATURE;
char buf[sizeof(signature) - 1];
Elf32_Shdr *sh;
int error;
sh = (Elf32_Shdr *)malloc(shsize, M_TEMP, M_WAITOK);
if ((error = elf32_read_from(p, epp->ep_vp, eh->e_shoff,
(caddr_t)sh, shsize)) != 0)
goto out;
for (i = 0; i < eh->e_shnum; i++) {
Elf32_Shdr *s = &sh[i];
if (s->sh_type != Elf_sht_note ||
s->sh_flags != 0 ||
s->sh_size < sizeof(signature) - 1)
continue;
if ((error = elf32_read_from(p, epp->ep_vp, s->sh_offset,
(caddr_t)buf, sizeof(signature) - 1)) != 0)
goto out;
if (bcmp(buf, signature, sizeof(signature) - 1) == 0)
goto out;
else
break; /* only one .note section so quit */
}
error = EFTYPE;
out:
free(sh, M_TEMP);
return error;
}
/*
* ibcs2_elf32_probe - search the executable for signs of SCO
*/
int
ibcs2_elf32_probe(p, epp, eh, itp, pos)
struct proc *p;
struct exec_package *epp;
Elf32_Ehdr *eh;
char *itp;
Elf32_Addr *pos;
{
char *bp;
int error;
size_t len;
if ((error = ibcs2_elf32_signature(p, epp, eh)) != 0)
return error;
if (itp[0]) {
if ((error = emul_find(p, NULL, ibcs2_emul_path, itp, &bp, 0)))
return error;
if ((error = copystr(bp, itp, MAXPATHLEN, &len)))
return error;
free(bp, M_TEMP);
}
epp->ep_emul = &emul_ibcs2_elf;
*pos = ELF32_NO_ADDR;
return 0;
}
/*
* exec_ibcs2_coff_makecmds(): Check if it's an coff-format executable.
*
* Given a proc 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_ibcs2_coff_makecmds(p, epp)
struct proc *p;
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 = epp->ep_hdr + sizeof(struct coff_filehdr);
switch (ap->a_magic) {
case COFF_OMAGIC:
error = exec_ibcs2_coff_prep_omagic(p, epp, fp, ap);
break;
case COFF_NMAGIC:
error = exec_ibcs2_coff_prep_nmagic(p, epp, fp, ap);
break;
case COFF_ZMAGIC:
error = exec_ibcs2_coff_prep_zmagic(p, epp, fp, ap);
break;
default:
return ENOEXEC;
}
if (error == 0)
epp->ep_emul = &emul_ibcs2_coff;
if (error)
kill_vmcmds(&epp->ep_vmcmds);
return error;
}
/*
* exec_ibcs2_coff_setup_stack(): Set up the stack segment for a coff
* executable.
*
* Note that the ep_ssize parameter must be set to be the current stack
* limit; this is adjusted in the body of execve() to yield the
* appropriate stack segment usage once the argument length is
* calculated.
*
* This function returns an int for uniformity with other (future) formats'
* stack setup functions. They might have errors to return.
*/
int
exec_ibcs2_coff_setup_stack(p, epp)
struct proc *p;
struct exec_package *epp;
{
/* DPRINTF(("enter exec_ibcs2_coff_setup_stack\n")); */
epp->ep_maxsaddr = USRSTACK - MAXSSIZ;
epp->ep_minsaddr = USRSTACK;
epp->ep_ssize = p->p_rlimit[RLIMIT_STACK].rlim_cur;
/*
* set up commands for stack. note that this takes *two*, one to
* map the part of the stack which we can access, and one to map
* the part which we can't.
*
* arguably, it could be made into one, but that would require the
* addition of another mapping proc, which is unnecessary
*
* note that in memory, things assumed to be: 0 ....... ep_maxsaddr
* <stack> ep_minsaddr
*/
/* DPRINTF(("VMCMD: addr %x size %d\n", epp->ep_maxsaddr,
(epp->ep_minsaddr - epp->ep_ssize) - epp->ep_maxsaddr)); */
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero,
((epp->ep_minsaddr - epp->ep_ssize) - epp->ep_maxsaddr),
epp->ep_maxsaddr, NULLVP, 0, VM_PROT_NONE);
/* DPRINTF(("VMCMD: addr %x size %d\n",
epp->ep_minsaddr - epp->ep_ssize,
epp->ep_ssize)); */
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, epp->ep_ssize,
(epp->ep_minsaddr - epp->ep_ssize), NULLVP, 0,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
return 0;
}
/*
* exec_ibcs2_coff_prep_omagic(): Prepare a COFF OMAGIC binary's exec package
*/
int
exec_ibcs2_coff_prep_omagic(p, epp, fp, ap)
struct proc *p;
struct exec_package *epp;
struct coff_filehdr *fp;
struct coff_aouthdr *ap;
{
epp->ep_taddr = COFF_SEGMENT_ALIGN(ap, ap->a_tstart);
epp->ep_tsize = ap->a_tsize;
epp->ep_daddr = COFF_SEGMENT_ALIGN(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 */
if (ap->a_bsize > 0)
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, ap->a_bsize,
COFF_SEGMENT_ALIGN(ap, ap->a_dstart + ap->a_dsize),
NULLVP, 0,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
return exec_ibcs2_coff_setup_stack(p, epp);
}
/*
* exec_ibcs2_coff_prep_nmagic(): Prepare a 'native' NMAGIC COFF binary's exec
* package.
*/
int
exec_ibcs2_coff_prep_nmagic(p, epp, fp, ap)
struct proc *p;
struct exec_package *epp;
struct coff_filehdr *fp;
struct coff_aouthdr *ap;
{
epp->ep_taddr = COFF_SEGMENT_ALIGN(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(ap, ap->a_dstart + ap->a_dsize),
NULLVP, 0,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
return exec_ibcs2_coff_setup_stack(p, epp);
}
/*
* coff_find_section - load specified section header
*
* TODO - optimize by reading all section headers in at once
*/
static int
coff_find_section(p, vp, fp, sh, s_type)
struct proc *p;
struct vnode *vp;
struct coff_filehdr *fp;
struct coff_scnhdr *sh;
int s_type;
{
int i, pos, resid, siz, error;
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, (caddr_t) sh,
siz, pos, UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred,
&resid, p);
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=%d got %d\n",
s_type, sizeof(struct coff_scnhdr),
resid, siz));
return ENOEXEC;
}
/* DPRINTF(("found section: %x\n", sh->s_flags)); */
if (sh->s_flags == s_type)
return 0;
}
return ENOEXEC;
}
/*
* exec_ibcs2_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_ibcs2_coff_prep_zmagic(p, epp, fp, ap)
struct proc *p;
struct exec_package *epp;
struct coff_filehdr *fp;
struct coff_aouthdr *ap;
{
int error;
u_long offset;
long dsize, baddr, bsize;
struct coff_scnhdr sh;
/* DPRINTF(("enter exec_ibcs2_coff_prep_zmagic\n")); */
/* set up command for text segment */
error = coff_find_section(p, 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 %x size %d offset %d\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);
#ifdef notyet
/*
* check if vnode is in open for writing, because we want to
* demand-page out of it. if it is, don't do it, for various
* reasons
n */
if ((ap->a_tsize != 0 || ap->a_dsize != 0) &&
epp->ep_vp->v_writecount != 0) {
#ifdef DIAGNOSTIC
if (epp->ep_vp->v_flag & VTEXT)
panic("exec: a VTEXT vnode has writecount != 0\n");
#endif
return ETXTBSY;
}
epp->ep_vp->v_flag |= VTEXT;
#endif
/* DPRINTF(("VMCMD: addr %x size %d offset %d\n", epp->ep_taddr,
epp->ep_tsize, offset)); */
#ifdef notyet
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);
#endif
/* set up command for data segment */
error = coff_find_section(p, 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 %x size %d offset %d\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);
epp->ep_dsize = dsize + ap->a_bsize;
/* DPRINTF(("VMCMD: addr %x size %d offset %d\n", epp->ep_daddr,
dsize, offset)); */
#ifdef notyet
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);
#endif
/* 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 %d offset %d\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);
}
/* load any shared libraries */
error = coff_find_section(p, epp->ep_vp, fp, &sh, COFF_STYP_SHLIB);
if (!error) {
int 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, (caddr_t) buf,
len, sh.s_scnptr,
UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred,
&resid, p);
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;
}
}
/* set up entry point */
epp->ep_entry = ap->a_entry;
#if 0
DPRINTF(("text addr: %x size: %d data addr: %x size: %d entry: %x\n",
epp->ep_taddr, epp->ep_tsize,
epp->ep_daddr, epp->ep_dsize,
epp->ep_entry));
#endif
return exec_ibcs2_coff_setup_stack(p, epp);
}
int
coff_load_shlib(p, path, epp)
struct proc *p;
char *path;
struct exec_package *epp;
{
int error, siz, resid;
int taddr, tsize, daddr, dsize, offset;
struct nameidata nd;
struct coff_filehdr fh, *fhp = &fh;
struct coff_scnhdr sh, *shp = &sh;
caddr_t sg = stackgap_init(p->p_emul);
/*
* 1. open shlib file
* 2. read filehdr
* 3. map text, data, and bss out of it using VM_*
*/
IBCS2_CHECK_ALT_EXIST(p, &sg, path);
NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, path, p);
/* 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, (caddr_t) fhp, siz, 0,
UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred, &resid, p);
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=%d got %d\n",
sizeof(struct coff_filehdr), resid, siz));
vrele(nd.ni_vp);
return ENOEXEC;
}
/* load text */
error = coff_find_section(p, 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 %d offset %d\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(p, 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 %d offset %d\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(p, 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 %d offset %d\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;
}
int
exec_ibcs2_xout_makecmds(p, epp)
struct proc *p;
struct exec_package *epp;
{
int error;
struct xexec *xp = epp->ep_hdr;
struct xext *xep;
if (epp->ep_hdrvalid < XOUT_HDR_SIZE)
return ENOEXEC;
if ((xp->x_magic != XOUT_MAGIC) || (xp->x_cpu != XC_386))
return ENOEXEC;
if ((xp->x_renv & (XE_ABS | XE_VMOD)) || !(xp->x_renv & XE_EXEC))
return ENOEXEC;
xep = epp->ep_hdr + sizeof(struct xexec);
#ifdef notyet
if (xp->x_renv & XE_PURE)
error = exec_ibcs2_xout_prep_zmagic(p, epp, xp, xep);
else
#endif
error = exec_ibcs2_xout_prep_nmagic(p, epp, xp, xep);
if (error == 0)
epp->ep_emul = &emul_ibcs2_xout;
if (error)
kill_vmcmds(&epp->ep_vmcmds);
return error;
}
/*
* exec_ibcs2_xout_prep_nmagic(): Prepare a pure x.out binary's exec package
*
*/
int
exec_ibcs2_xout_prep_nmagic(p, epp, xp, xep)
struct proc *p;
struct exec_package *epp;
struct xexec *xp;
struct xext *xep;
{
int error, resid, nseg, i;
long baddr, bsize;
struct xseg *xs;
/* read in segment table */
xs = (struct xseg *)malloc(xep->xe_segsize, M_TEMP, M_WAITOK);
error = vn_rdwr(UIO_READ, epp->ep_vp, (caddr_t)xs,
xep->xe_segsize, xep->xe_segpos,
UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred,
&resid, p);
if (error) {
DPRINTF(("segment table read error %d\n", error));
free(xs, M_TEMP);
return ENOEXEC;
}
for (nseg = xep->xe_segsize / sizeof(*xs), i = 0; i < nseg; i++) {
switch (xs[i].xs_type) {
case XS_TTEXT: /* text segment */
DPRINTF(("text addr %x psize %d vsize %d off %d\n",
xs[i].xs_rbase, xs[i].xs_psize,
xs[i].xs_vsize, xs[i].xs_filpos));
epp->ep_taddr = xs[i].xs_rbase; /* XXX - align ??? */
epp->ep_tsize = xs[i].xs_vsize;
DPRINTF(("VMCMD: addr %x size %d offset %d\n",
epp->ep_taddr, epp->ep_tsize,
xs[i].xs_filpos));
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
epp->ep_tsize, epp->ep_taddr,
epp->ep_vp, xs[i].xs_filpos,
VM_PROT_READ|VM_PROT_EXECUTE);
break;
case XS_TDATA: /* data segment */
DPRINTF(("data addr %x psize %d vsize %d off %d\n",
xs[i].xs_rbase, xs[i].xs_psize,
xs[i].xs_vsize, xs[i].xs_filpos));
epp->ep_daddr = xs[i].xs_rbase; /* XXX - align ??? */
epp->ep_dsize = xs[i].xs_vsize;
DPRINTF(("VMCMD: addr %x size %d offset %d\n",
epp->ep_daddr, xs[i].xs_psize,
xs[i].xs_filpos));
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
xs[i].xs_psize, epp->ep_daddr,
epp->ep_vp, xs[i].xs_filpos,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
/* set up command for bss segment */
baddr = round_page(epp->ep_daddr + xs[i].xs_psize);
bsize = epp->ep_daddr + epp->ep_dsize - baddr;
if (bsize > 0) {
DPRINTF(("VMCMD: bss addr %x size %d off %d\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);
}
break;
default:
break;
}
}
/* set up entry point */
epp->ep_entry = xp->x_entry;
DPRINTF(("text addr: %x size: %d data addr: %x size: %d entry: %x\n",
epp->ep_taddr, epp->ep_tsize,
epp->ep_daddr, epp->ep_dsize,
epp->ep_entry));
free(xs, M_TEMP);
return exec_ibcs2_xout_setup_stack(p, epp);
}
/*
* exec_ibcs2_xout_setup_stack(): Set up the stack segment for a x.out
* executable.
*
* Note that the ep_ssize parameter must be set to be the current stack
* limit; this is adjusted in the body of execve() to yield the
* appropriate stack segment usage once the argument length is
* calculated.
*
* This function returns an int for uniformity with other (future) formats'
* stack setup functions. They might have errors to return.
*/
int
exec_ibcs2_xout_setup_stack(p, epp)
struct proc *p;
struct exec_package *epp;
{
epp->ep_maxsaddr = USRSTACK - MAXSSIZ;
epp->ep_minsaddr = USRSTACK;
epp->ep_ssize = p->p_rlimit[RLIMIT_STACK].rlim_cur;
/*
* set up commands for stack. note that this takes *two*, one to
* map the part of the stack which we can access, and one to map
* the part which we can't.
*
* arguably, it could be made into one, but that would require the
* addition of another mapping proc, which is unnecessary
*
* note that in memory, things assumed to be: 0 ....... ep_maxsaddr
* <stack> ep_minsaddr
*/
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero,
((epp->ep_minsaddr - epp->ep_ssize) - epp->ep_maxsaddr),
epp->ep_maxsaddr, NULLVP, 0, VM_PROT_NONE);
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, epp->ep_ssize,
(epp->ep_minsaddr - epp->ep_ssize), NULLVP, 0,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
return 0;
}
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