NetBSD/sys/compat/netbsd32/netbsd32_exec.c

476 lines
13 KiB
C

/* $NetBSD: netbsd32_exec.c,v 1.21 2000/06/28 15:39:31 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 char *netbsd32_syscallnames[];
#endif
void *netbsd32_copyargs __P((struct exec_package *, struct ps_strings *,
void *, void *));
void *netbsd32_elf32_copyargs __P((struct exec_package *, struct ps_strings *,
void *, void *));
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 *));
#ifdef EXEC_AOUT
struct emul emul_netbsd32 = {
"netbsd32",
NULL,
netbsd32_sendsig,
netbsd32_SYS_syscall,
netbsd32_SYS_MAXSYSCALL,
netbsd32_sysent,
#ifdef SYSCALL_DEBUG
netbsd32_syscallnames,
#else
NULL,
#endif
0,
netbsd32_copyargs,
netbsd32_setregs,
netbsd32_sigcode,
netbsd32_esigcode,
};
#endif /* EXEC_AOUT */
#ifdef EXEC_ELF32
/* Elf emul structure */
struct emul ELFNAMEEND(emul_netbsd32) = {
"netbsd32",
NULL,
netbsd32_sendsig,
netbsd32_SYS_syscall,
netbsd32_SYS_MAXSYSCALL,
netbsd32_sysent,
#ifdef SYSCALL_DEBUG
netbsd32_syscallnames,
#else
NULL,
#endif
howmany(ELF_AUX_ENTRIES * sizeof(AuxInfo), sizeof(Elf_Addr)),
netbsd32_elf32_copyargs,
netbsd32_setregs,
netbsd32_sigcode,
netbsd32_esigcode,
};
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;
Elf_Ehdr *eh;
char *itp;
Elf_Addr *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_emul = &ELFNAMEEND(emul_netbsd32);
epp->ep_flags |= EXEC_32;
*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_emul = &emul_netbsd32;
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_emul->e_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;
}