7af8b6448c
vaddr_t. cast the pointer before dereferencing it to avoid the alignment fault that broke compat_netbsd32, cuz pos is defined like: Elf_Addr phdr = 0, pos = 0; in exec_elf32.c.
446 lines
12 KiB
C
446 lines
12 KiB
C
/* $NetBSD: netbsd32_exec.c,v 1.25 2000/12/01 08:59:02 mrg Exp $ */
|
|
/* from: NetBSD: exec_aout.c,v 1.15 1996/09/26 23:34:46 cgd Exp */
|
|
|
|
/*
|
|
* Copyright (c) 1998 Matthew R. Green.
|
|
* 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.
|
|
*/
|
|
|
|
#define ELFSIZE 32
|
|
|
|
#include "opt_compat_sunos.h"
|
|
#include "opt_syscall_debug.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/exec.h>
|
|
#include <sys/exec_elf.h>
|
|
#include <sys/resourcevar.h>
|
|
#include <sys/signal.h>
|
|
#include <sys/signalvar.h>
|
|
|
|
#include <compat/netbsd32/netbsd32.h>
|
|
#include <compat/netbsd32/netbsd32_exec.h>
|
|
#include <compat/netbsd32/netbsd32_syscall.h>
|
|
|
|
#include <machine/frame.h>
|
|
#include <machine/netbsd32_machdep.h>
|
|
|
|
const char netbsd32_emul_path[] = "/emul/netbsd32";
|
|
extern char netbsd32_sigcode[], netbsd32_esigcode[];
|
|
extern struct sysent netbsd32_sysent[];
|
|
#ifdef SYSCALL_DEBUG
|
|
extern const char * const netbsd32_syscallnames[];
|
|
#endif
|
|
int netbsd32_copyinargs __P((struct exec_package *, struct ps_strings *,
|
|
void *, size_t, const void *, const void *));
|
|
|
|
static int netbsd32_exec_aout_prep_zmagic __P((struct proc *,
|
|
struct exec_package *));
|
|
static int netbsd32_exec_aout_prep_nmagic __P((struct proc *,
|
|
struct exec_package *));
|
|
static int netbsd32_exec_aout_prep_omagic __P((struct proc *,
|
|
struct exec_package *));
|
|
|
|
const struct emul emul_netbsd32 = {
|
|
"netbsd32",
|
|
NULL,
|
|
netbsd32_sendsig,
|
|
netbsd32_SYS_syscall,
|
|
netbsd32_SYS_MAXSYSCALL,
|
|
netbsd32_sysent,
|
|
#ifdef SYSCALL_DEBUG
|
|
netbsd32_syscallnames,
|
|
#else
|
|
NULL,
|
|
#endif
|
|
netbsd32_sigcode,
|
|
netbsd32_esigcode,
|
|
};
|
|
|
|
#ifdef EXEC_ELF32
|
|
|
|
extern int ELFNAME2(netbsd,signature) __P((struct proc *, struct exec_package *,
|
|
Elf_Ehdr *));
|
|
int
|
|
ELFNAME2(netbsd32,probe)(p, epp, eh, itp, pos)
|
|
struct proc *p;
|
|
struct exec_package *epp;
|
|
void *eh;
|
|
char *itp;
|
|
vaddr_t *pos;
|
|
{
|
|
int error;
|
|
size_t i;
|
|
const char *bp;
|
|
|
|
if ((error = ELFNAME2(netbsd,signature)(p, epp, eh)) != 0)
|
|
return error;
|
|
|
|
if (itp[0]) {
|
|
if ((error = emul_find(p, NULL, netbsd32_emul_path,
|
|
itp, &bp, 0)) &&
|
|
(error = emul_find(p, NULL, "", itp, &bp, 0)))
|
|
return error;
|
|
if ((error = copystr(bp, itp, MAXPATHLEN, &i)) != 0)
|
|
return error;
|
|
free((void *)bp, M_TEMP);
|
|
}
|
|
epp->ep_flags |= EXEC_32;
|
|
*(Elf_Addr *)pos = ELFDEFNNAME(NO_ADDR);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef EXEC_AOUT
|
|
/*
|
|
* exec_netbsd32_makecmds(): Check if it's an netbsd32 a.out format
|
|
* executable.
|
|
*
|
|
* Given a proc pointer and an exec package pointer, see if the referent
|
|
* of the epp is in netbsd32 a.out format. Check 'standard' magic
|
|
* numbers for this architecture.
|
|
*
|
|
* This function, in the former case, or the hook, in the latter, 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_netbsd32_makecmds(p, epp)
|
|
struct proc *p;
|
|
struct exec_package *epp;
|
|
{
|
|
netbsd32_u_long midmag, magic;
|
|
u_short mid;
|
|
int error;
|
|
struct netbsd32_exec *execp = epp->ep_hdr;
|
|
|
|
if (epp->ep_hdrvalid < sizeof(struct netbsd32_exec))
|
|
return ENOEXEC;
|
|
|
|
midmag = (netbsd32_u_long)ntohl(execp->a_midmag);
|
|
mid = (midmag >> 16) & 0x3ff;
|
|
magic = midmag & 0xffff;
|
|
|
|
midmag = mid << 16 | magic;
|
|
|
|
switch (midmag) {
|
|
case (MID_SPARC << 16) | ZMAGIC:
|
|
error = netbsd32_exec_aout_prep_zmagic(p, epp);
|
|
break;
|
|
case (MID_SPARC << 16) | NMAGIC:
|
|
error = netbsd32_exec_aout_prep_nmagic(p, epp);
|
|
break;
|
|
case (MID_SPARC << 16) | OMAGIC:
|
|
error = netbsd32_exec_aout_prep_omagic(p, epp);
|
|
break;
|
|
default:
|
|
/* Invalid magic */
|
|
error = ENOEXEC;
|
|
break;
|
|
}
|
|
|
|
if (error == 0) {
|
|
/* set up our emulation information */
|
|
epp->ep_flags |= EXEC_32;
|
|
} else
|
|
kill_vmcmds(&epp->ep_vmcmds);
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* netbsd32_exec_aout_prep_zmagic(): Prepare a 'native' ZMAGIC binary's
|
|
* exec package
|
|
*
|
|
* First, set of 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
|
|
netbsd32_exec_aout_prep_zmagic(p, epp)
|
|
struct proc *p;
|
|
struct exec_package *epp;
|
|
{
|
|
struct netbsd32_exec *execp = epp->ep_hdr;
|
|
|
|
epp->ep_taddr = USRTEXT;
|
|
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;
|
|
|
|
/*
|
|
* 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
|
|
*/
|
|
if ((execp->a_text != 0 || execp->a_data != 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;
|
|
}
|
|
vn_marktext(epp->ep_vp);
|
|
|
|
/* set up command for text segment */
|
|
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text,
|
|
epp->ep_taddr, epp->ep_vp, 0, 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,
|
|
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
|
|
|
|
/* set up command for bss segment */
|
|
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 exec_aout_setup_stack(p, epp);
|
|
}
|
|
|
|
/*
|
|
* netbsd32_exec_aout_prep_nmagic(): Prepare a 'native' NMAGIC binary's
|
|
* exec package
|
|
*/
|
|
|
|
int
|
|
netbsd32_exec_aout_prep_nmagic(p, epp)
|
|
struct proc *p;
|
|
struct exec_package *epp;
|
|
{
|
|
struct netbsd32_exec *execp = epp->ep_hdr;
|
|
long bsize, baddr;
|
|
|
|
epp->ep_taddr = USRTEXT;
|
|
epp->ep_tsize = execp->a_text;
|
|
epp->ep_daddr = roundup(epp->ep_taddr + execp->a_text, __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, NBPG);
|
|
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 exec_aout_setup_stack(p, epp);
|
|
}
|
|
|
|
/*
|
|
* netbsd32_exec_aout_prep_omagic(): Prepare a 'native' OMAGIC binary's
|
|
* exec package
|
|
*/
|
|
|
|
int
|
|
netbsd32_exec_aout_prep_omagic(p, epp)
|
|
struct proc *p;
|
|
struct exec_package *epp;
|
|
{
|
|
struct netbsd32_exec *execp = epp->ep_hdr;
|
|
long dsize, bsize, baddr;
|
|
|
|
epp->ep_taddr = USRTEXT;
|
|
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, NBPG);
|
|
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, NBPG);
|
|
epp->ep_dsize = (dsize > 0) ? dsize : 0;
|
|
return exec_aout_setup_stack(p, epp);
|
|
}
|
|
|
|
#endif
|
|
|
|
/*
|
|
* We need to copy out all pointers as 32-bit values.
|
|
*/
|
|
void *
|
|
netbsd32_copyargs(pack, arginfo, stack, argp)
|
|
struct exec_package *pack;
|
|
struct ps_strings *arginfo;
|
|
void *stack;
|
|
void *argp;
|
|
{
|
|
u_int32_t *cpp = stack;
|
|
u_int32_t dp;
|
|
u_int32_t nullp = 0;
|
|
char *sp;
|
|
size_t len;
|
|
int argc = arginfo->ps_nargvstr;
|
|
int envc = arginfo->ps_nenvstr;
|
|
|
|
if (copyout(&argc, cpp++, sizeof(argc)))
|
|
return NULL;
|
|
|
|
dp = (u_long) (cpp + argc + envc + 2 + pack->ep_esch->es_arglen);
|
|
sp = argp;
|
|
|
|
/* XXX don't copy them out, remap them! */
|
|
arginfo->ps_argvstr = (char **)(u_long)cpp; /* remember location of argv for later */
|
|
|
|
for (; --argc >= 0; sp += len, dp += len) {
|
|
if (copyout(&dp, cpp++, sizeof(dp)) ||
|
|
copyoutstr(sp, (char *)(u_long)dp, ARG_MAX, &len))
|
|
return NULL;
|
|
}
|
|
if (copyout(&nullp, cpp++, sizeof(nullp)))
|
|
return NULL;
|
|
|
|
arginfo->ps_envstr = (char **)(u_long)cpp; /* remember location of envp for later */
|
|
|
|
for (; --envc >= 0; sp += len, dp += len) {
|
|
if (copyout(&dp, cpp++, sizeof(dp)) ||
|
|
copyoutstr(sp, (char *)(u_long)dp, ARG_MAX, &len))
|
|
return NULL;
|
|
}
|
|
if (copyout(&nullp, cpp++, sizeof(nullp)))
|
|
return NULL;
|
|
|
|
return cpp;
|
|
}
|
|
|
|
/* round up and down to page boundaries. */
|
|
#define ELF_ROUND(a, b) (((a) + (b) - 1) & ~((b) - 1))
|
|
#define ELF_TRUNC(a, b) ((a) & ~((b) - 1))
|
|
|
|
/*
|
|
* Copy arguments onto the stack in the normal way, but add some
|
|
* extra information in case of dynamic binding.
|
|
*/
|
|
void *
|
|
netbsd32_elf32_copyargs(pack, arginfo, stack, argp)
|
|
struct exec_package *pack;
|
|
struct ps_strings *arginfo;
|
|
void *stack;
|
|
void *argp;
|
|
{
|
|
size_t len;
|
|
AuxInfo ai[ELF_AUX_ENTRIES], *a;
|
|
struct elf_args *ap;
|
|
|
|
stack = netbsd32_copyargs(pack, arginfo, stack, argp);
|
|
if (!stack)
|
|
return NULL;
|
|
|
|
a = ai;
|
|
|
|
/*
|
|
* Push extra arguments on the stack needed by dynamically
|
|
* linked binaries
|
|
*/
|
|
if ((ap = (struct elf_args *)pack->ep_emul_arg)) {
|
|
|
|
a->a_type = AT_PHDR;
|
|
a->a_v = ap->arg_phaddr;
|
|
a++;
|
|
|
|
a->a_type = AT_PHENT;
|
|
a->a_v = ap->arg_phentsize;
|
|
a++;
|
|
|
|
a->a_type = AT_PHNUM;
|
|
a->a_v = ap->arg_phnum;
|
|
a++;
|
|
|
|
a->a_type = AT_PAGESZ;
|
|
a->a_v = NBPG;
|
|
a++;
|
|
|
|
a->a_type = AT_BASE;
|
|
a->a_v = ap->arg_interp;
|
|
a++;
|
|
|
|
a->a_type = AT_FLAGS;
|
|
a->a_v = 0;
|
|
a++;
|
|
|
|
a->a_type = AT_ENTRY;
|
|
a->a_v = ap->arg_entry;
|
|
a++;
|
|
|
|
free((char *)ap, M_TEMP);
|
|
pack->ep_emul_arg = NULL;
|
|
}
|
|
|
|
a->a_type = AT_NULL;
|
|
a->a_v = 0;
|
|
a++;
|
|
|
|
len = (a - ai) * sizeof(AuxInfo);
|
|
if (copyout(ai, stack, len))
|
|
return NULL;
|
|
stack = (caddr_t)stack + len;
|
|
|
|
return stack;
|
|
}
|
|
|