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First attempt at FreeBSD & Linux ELF support.

Browse Source 
Compile and link a new kernel, that will give native ELF support, and
provide the hooks for other ELF interpreters as well.

To make native ELF binaries use John Polstras elf-kit-1.0.1..
For the time being also use his ld-elf.so.1 and put it in
/usr/libexec.

The Linux emulator has been enhanced to also run ELF binaries, it
is however in its very first incarnation.
Just get some Linux ELF libs (Slackware-3.0) and put them in the
prober place (/compat/linux/...).
I've ben able to run all the Slackware-3.0 binaries I've tried
so far.
(No it won't run quake yet :)
This commit is contained in:
Søren Schmidt 1996-03-10 08:42:54 +00:00
parent 7c1b69d881
commit e1743d02cd
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=14456
16 changed files with 1204 additions and 149 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
lkm/linux/Makefile
View File

@ -1,4 +1,4 @@
# $Id: Makefile,v 1.5 1996/01/27 23:57:06 rgrimes Exp $
# $Id: Makefile,v 1.6 1996/03/02 20:00:35 peter Exp $
.PATH: ${.CURDIR}/../../sys/i386/linux
KMOD= linux_mod
@ -11,7 +11,7 @@ NOMAN=
CFLAGS+= -DLKM -I. -DCOMPAT_43 -DCOMPAT_LINUX #-DDEBUG
CPPFLAGS= -I. -I${.CURDIR}/../../sys
EXPORT_SYMS=_linux_mod
CLEANFILES+= vnode_if.h vnode_if.c linux_genassym.o linux_genassym machine \
linux_assym.h

14
lkm/linux/linux.c
View File

@ -25,7 +25,7 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: linux.c,v 1.3 1995/11/13 07:18:38 bde Exp $
* $Id: linux.c,v 1.4 1995/11/14 07:34:18 bde Exp $
*/
#include <sys/param.h>
@ -34,14 +34,24 @@
#include <sys/conf.h>
#include <sys/sysent.h>
#include <sys/lkm.h>
#include <sys/imgact_elf.h>
#include "i386/linux/linux.h"
extern const struct execsw linux_execsw;
MOD_EXEC(linux, -1, (struct execsw*)&linux_execsw);
static Elf32_Interp_info linux_interp = {
&elf_linux_sysvec,
"/lib/ld-linux.so.1",
"/compat/linux"
};
static int
linux_load(struct lkm_table *lkmtp, int cmd)
{
if (elf_insert_interp(&linux_interp))
uprintf("Could not install ELF interpreter entry\n");
uprintf("Linux emulator installed\n");
return 0;
}
@ -49,6 +59,8 @@ linux_load(struct lkm_table *lkmtp, int cmd)
static int
linux_unload(struct lkm_table *lkmtp, int cmd)
{
if (elf_remove_interp(&linux_interp))
uprintf("Could not deinstall ELF interpreter entry\n");
uprintf("Linux emulator removed\n");
return 0;
}

14
sys/alpha/linux/linux.h
View File

@ -1,5 +1,5 @@
/*-
* Copyright (c) 1994-1995 Søren Schmidt
* Copyright (c) 1994-1996 Søren Schmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -25,11 +25,12 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: linux.h,v 1.5 1996/03/02 19:37:47 peter Exp $
* $Id: linux.h,v 1.6 1996/03/03 19:07:49 peter Exp $
*/
#ifndef _I386_LINUX_LINUX_H_
#define _I386_LINUX_LINUX_H_
#include "i386/linux/linux_syscall.h"
typedef unsigned short linux_uid_t;
typedef unsigned short linux_gid_t;
@ -97,13 +98,20 @@ struct linux_sigframe {
sig_t sf_handler;
};
extern int bsd_to_linux_errno[];
extern int bsd_to_linux_signal[];
extern int linux_to_bsd_signal[];
extern char linux_sigcode[];
extern int linux_szsigcode;
extern const char linux_emul_path[];
extern struct sysent linux_sysent[LINUX_SYS_MAXSYSCALL];
extern struct sysentvec linux_sysvec;
extern struct sysentvec elf_linux_sysvec;
/* dummy struct definitions */
struct image_params;
int linux_fixup __P((int **stack_base, struct image_params *iparams));
struct trapframe;
/* misc defines */
#define LINUX_NAME_MAX 255

164
sys/alpha/linux/linux_sysvec.c
View File

@ -1,5 +1,5 @@
/*-
* Copyright (c) 1994-1995 Søren Schmidt
* Copyright (c) 1994-1996 Søren Schmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -25,7 +25,7 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: linux_sysent.c,v 1.4 1996/01/14 10:59:57 sos Exp $
* $Id: linux_sysvec.c,v 1.1 1996/03/02 19:38:01 peter Exp $
*/
/* XXX we use functions that might not exist. */
@ -36,7 +36,9 @@
#include <sys/sysproto.h>
#include <sys/sysent.h>
#include <sys/imgact.h>
#include <sys/imgact_elf.h>
#include <sys/signalvar.h>
#include <sys/malloc.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/vm_prot.h>
@ -59,62 +61,93 @@
#include <i386/linux/linux.h>
#include <i386/linux/linux_proto.h>
#include <i386/linux/linux_syscall.h>
int linux_fixup __P((int **stack_base, struct image_params *iparams));
int elf_linux_fixup __P((int **stack_base, struct image_params *iparams));
void linux_prepsyscall __P((struct trapframe *tf, int *args, u_int *code, caddr_t *params));
void linux_sendsig __P((sig_t catcher, int sig, int mask, unsigned code));
/*
* Linux syscalls return negative errno's, we do positive and map them
*/
int bsd_to_linux_errno[ELAST] = {
-0, -1, -2, -3, -4, -5, -6, -7, -8, -9,
-10, -35, -12, -13, -14, -15, -16, -17, -18, -19,
-20, -21, -22, -23, -24, -25, -26, -27, -28, -29,
-30, -31, -32, -33, -34, -11,-115,-114, -88, -89,
-90, -91, -92, -93, -94, -95, -96, -97, -98, -99,
-100,-101,-102,-103,-104,-105,-106,-107,-108,-109,
-110,-111, -40, -36,-112,-113, -39, -11, -87,-122,
-116, -66, -6, -6, -6, -6, -6, -37, -38, -9,
-6,
-0, -1, -2, -3, -4, -5, -6, -7, -8, -9,
-10, -35, -12, -13, -14, -15, -16, -17, -18, -19,
-20, -21, -22, -23, -24, -25, -26, -27, -28, -29,
-30, -31, -32, -33, -34, -11,-115,-114, -88, -89,
-90, -91, -92, -93, -94, -95, -96, -97, -98, -99,
-100,-101,-102,-103,-104,-105,-106,-107,-108,-109,
-110,-111, -40, -36,-112,-113, -39, -11, -87,-122,
-116, -66, -6, -6, -6, -6, -6, -37, -38, -9,
-6,
};
int bsd_to_linux_signal[NSIG] = {
0, LINUX_SIGHUP, LINUX_SIGINT, LINUX_SIGQUIT,
LINUX_SIGILL, LINUX_SIGTRAP, LINUX_SIGABRT, 0,
LINUX_SIGFPE, LINUX_SIGKILL, LINUX_SIGBUS, LINUX_SIGSEGV,
0, LINUX_SIGPIPE, LINUX_SIGALRM, LINUX_SIGTERM,
LINUX_SIGURG, LINUX_SIGSTOP, LINUX_SIGTSTP, LINUX_SIGCONT,
LINUX_SIGCHLD, LINUX_SIGTTIN, LINUX_SIGTTOU, LINUX_SIGIO,
LINUX_SIGXCPU, LINUX_SIGXFSZ, LINUX_SIGVTALRM, LINUX_SIGPROF,
LINUX_SIGWINCH, 0, LINUX_SIGUSR1, LINUX_SIGUSR2
0, LINUX_SIGHUP, LINUX_SIGINT, LINUX_SIGQUIT,
LINUX_SIGILL, LINUX_SIGTRAP, LINUX_SIGABRT, 0,
LINUX_SIGFPE, LINUX_SIGKILL, LINUX_SIGBUS, LINUX_SIGSEGV,
0, LINUX_SIGPIPE, LINUX_SIGALRM, LINUX_SIGTERM,
LINUX_SIGURG, LINUX_SIGSTOP, LINUX_SIGTSTP, LINUX_SIGCONT,
LINUX_SIGCHLD, LINUX_SIGTTIN, LINUX_SIGTTOU, LINUX_SIGIO,
LINUX_SIGXCPU, LINUX_SIGXFSZ, LINUX_SIGVTALRM, LINUX_SIGPROF,
LINUX_SIGWINCH, 0, LINUX_SIGUSR1, LINUX_SIGUSR2
};
int linux_to_bsd_signal[LINUX_NSIG] = {
0, SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGTRAP, SIGABRT, SIGEMT,
SIGFPE, SIGKILL, SIGUSR1, SIGSEGV, SIGUSR2, SIGPIPE, SIGALRM, SIGTERM,
SIGBUS, SIGCHLD, SIGCONT, SIGSTOP, SIGTSTP, SIGTTIN, SIGTTOU, SIGIO,
SIGXCPU, SIGXFSZ, SIGVTALRM, SIGPROF, SIGWINCH, SIGURG, SIGURG, 0
0, SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGTRAP, SIGABRT, SIGEMT,
SIGFPE, SIGKILL, SIGUSR1, SIGSEGV, SIGUSR2, SIGPIPE, SIGALRM, SIGTERM,
SIGBUS, SIGCHLD, SIGCONT, SIGSTOP, SIGTSTP, SIGTTIN, SIGTTOU, SIGIO,
SIGXCPU, SIGXFSZ, SIGVTALRM, SIGPROF, SIGWINCH, SIGURG, SIGURG, 0
};
int linux_fixup(int **stack_base, struct image_params *imgp)
{
int *argv, *envp;
int *argv, *envp;
argv = *stack_base;
envp = *stack_base + (imgp->argc + 1);
(*stack_base)--;
**stack_base = (int)envp;
(*stack_base)--;
**stack_base = (int)argv;
(*stack_base)--;
**stack_base = (int)imgp->argc;
return 0; /* XXX */
argv = *stack_base;
envp = *stack_base + (imgp->argc + 1);
(*stack_base)--;
**stack_base = (int)envp;
(*stack_base)--;
**stack_base = (int)argv;
(*stack_base)--;
**stack_base = (int)imgp->argc;
return 0;
}
extern struct sysent linux_sysent[LINUX_SYS_MAXSYSCALL];
int elf_linux_fixup(int **stack_base, struct image_params *imgp)
{
Elf32_Auxargs *args = (Elf32_Auxargs *)imgp->auxargs;
int *pos;
pos = *stack_base + (imgp->argc + imgp->envc + 2);
if (args->trace) {
AUXARGS_ENTRY(pos, AT_DEBUG, 1);
}
if (args->execfd != -1) {
AUXARGS_ENTRY(pos, AT_EXECFD, args->execfd);
}
AUXARGS_ENTRY(pos, AT_PHDR, args->phdr);
AUXARGS_ENTRY(pos, AT_PHENT, args->phent);
AUXARGS_ENTRY(pos, AT_PHNUM, args->phnum);
AUXARGS_ENTRY(pos, AT_PAGESZ, args->pagesz);
AUXARGS_ENTRY(pos, AT_FLAGS, args->flags);
AUXARGS_ENTRY(pos, AT_ENTRY, args->entry);
AUXARGS_ENTRY(pos, AT_BASE, args->base);
AUXARGS_ENTRY(pos, AT_UID, imgp->proc->p_cred->p_ruid);
AUXARGS_ENTRY(pos, AT_EUID, imgp->proc->p_cred->p_svuid);
AUXARGS_ENTRY(pos, AT_GID, imgp->proc->p_cred->p_rgid);
AUXARGS_ENTRY(pos, AT_EGID, imgp->proc->p_cred->p_svgid);
AUXARGS_ENTRY(pos, AT_NULL, 0);
free(imgp->auxargs, M_TEMP);
imgp->auxargs = NULL;
static void linux_sendsig(sig_t action,
int sig,
int returnmask,
unsigned code);
(*stack_base)--;
**stack_base = (int)imgp->argc;
return 0;
}
extern int _ucodesel, _udatasel;
@ -129,12 +162,8 @@ extern int _ucodesel, _udatasel;
* specified pc, psl.
*/
static void
linux_sendsig(catcher, sig, mask, code)
sig_t catcher;
int sig;
int mask;
unsigned code;
void
linux_sendsig(sig_t catcher, int sig, int mask, unsigned code)
{
register struct proc *p = curproc;
register int *regs;
@ -327,7 +356,7 @@ linux_sigreturn(p, args, retval)
return (EJUSTRETURN);
}
static void
void
linux_prepsyscall(struct trapframe *tf, int *args, u_int *code, caddr_t *params)
{
int i;
@ -339,20 +368,33 @@ linux_prepsyscall(struct trapframe *tf, int *args, u_int *code, caddr_t *params)
*params = NULL; /* no copyin */
}
extern char linux_sigcode[];
extern int linux_szsigcode;
struct sysentvec linux_sysvec = {
sizeof (linux_sysent) / sizeof(linux_sysent[0]),
linux_sysent,
0xff,
NSIG,
bsd_to_linux_signal,
ELAST,
bsd_to_linux_errno,
linux_fixup,
linux_sendsig,
linux_sigcode,
&linux_szsigcode,
linux_prepsyscall,
LINUX_SYS_MAXSYSCALL,
linux_sysent,
0xff,
NSIG,
bsd_to_linux_signal,
ELAST,
bsd_to_linux_errno,
linux_fixup,
linux_sendsig,
linux_sigcode,
&linux_szsigcode,
linux_prepsyscall,
};
struct sysentvec elf_linux_sysvec = {
LINUX_SYS_MAXSYSCALL,
linux_sysent,
0xff,
NSIG,
bsd_to_linux_signal,
ELAST,
bsd_to_linux_errno,
elf_linux_fixup,
linux_sendsig,
linux_sigcode,
&linux_szsigcode,
linux_prepsyscall,
};

4
sys/compat/linux/linux_util.h
View File

@ -28,7 +28,7 @@
*
* from: svr4_util.h,v 1.5 1994/11/18 02:54:31 christos Exp
* from: linux_util.h,v 1.2 1995/03/05 23:23:50 fvdl Exp
* $Id$
* $Id: linux_util.h,v 1.1 1996/03/02 19:38:02 peter Exp $
*/
/*
@ -78,8 +78,6 @@ stackgap_alloc(sgp, sz)
#define DPRINTF(a)
#endif
extern const char linux_emul_path[];
int linux_emul_find __P((struct proc *, caddr_t *, const char *, char *,
char **, int));

1
sys/conf/files
View File

@ -42,6 +42,7 @@ kdb/kdb_runpcs.c optional kadb
kdb/kdb_sym.c optional kadb
kdb/kdb_trap.c optional kadb
kern/imgact_aout.c standard
kern/imgact_elf.c standard
kern/imgact_gzip.c optional gzip
kern/imgact_shell.c standard
kern/inflate.c optional gzip

6
sys/i386/linux/imgact_linux.c
View File

@ -1,5 +1,5 @@
/*-
* Copyright (c) 1994-1995 Søren Schmidt
* Copyright (c) 1994-1996 Søren Schmidt
* All rights reserved.
*
* Based heavily on /sys/kern/imgact_aout.c which is:
@ -28,7 +28,7 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: imgact_linux.c,v 1.8 1996/02/16 18:40:48 peter Exp $
* $Id: imgact_linux.c,v 1.9 1996/03/02 19:37:47 peter Exp $
*/
#include <sys/param.h>
@ -227,6 +227,6 @@ exec_linux_imgact(imgp)
* Since `const' objects end up in the text segment, TEXT_SET is the
* correct directive to use.
*/
const struct execsw linux_execsw = { exec_linux_imgact, "linux" };
const struct execsw linux_execsw = { exec_linux_imgact, "linux a.out" };
TEXT_SET(execsw_set, linux_execsw);

14
sys/i386/linux/linux.h
View File

@ -1,5 +1,5 @@
/*-
* Copyright (c) 1994-1995 Søren Schmidt
* Copyright (c) 1994-1996 Søren Schmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -25,11 +25,12 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: linux.h,v 1.5 1996/03/02 19:37:47 peter Exp $
* $Id: linux.h,v 1.6 1996/03/03 19:07:49 peter Exp $
*/
#ifndef _I386_LINUX_LINUX_H_
#define _I386_LINUX_LINUX_H_
#include "i386/linux/linux_syscall.h"
typedef unsigned short linux_uid_t;
typedef unsigned short linux_gid_t;
@ -97,13 +98,20 @@ struct linux_sigframe {
sig_t sf_handler;
};
extern int bsd_to_linux_errno[];
extern int bsd_to_linux_signal[];
extern int linux_to_bsd_signal[];
extern char linux_sigcode[];
extern int linux_szsigcode;
extern const char linux_emul_path[];
extern struct sysent linux_sysent[LINUX_SYS_MAXSYSCALL];
extern struct sysentvec linux_sysvec;
extern struct sysentvec elf_linux_sysvec;
/* dummy struct definitions */
struct image_params;
int linux_fixup __P((int **stack_base, struct image_params *iparams));
struct trapframe;
/* misc defines */
#define LINUX_NAME_MAX 255

164
sys/i386/linux/linux_sysvec.c
View File

@ -1,5 +1,5 @@
/*-
* Copyright (c) 1994-1995 Søren Schmidt
* Copyright (c) 1994-1996 Søren Schmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -25,7 +25,7 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: linux_sysent.c,v 1.4 1996/01/14 10:59:57 sos Exp $
* $Id: linux_sysvec.c,v 1.1 1996/03/02 19:38:01 peter Exp $
*/
/* XXX we use functions that might not exist. */
@ -36,7 +36,9 @@
#include <sys/sysproto.h>
#include <sys/sysent.h>
#include <sys/imgact.h>
#include <sys/imgact_elf.h>
#include <sys/signalvar.h>
#include <sys/malloc.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/vm_prot.h>
@ -59,62 +61,93 @@
#include <i386/linux/linux.h>
#include <i386/linux/linux_proto.h>
#include <i386/linux/linux_syscall.h>
int linux_fixup __P((int **stack_base, struct image_params *iparams));
int elf_linux_fixup __P((int **stack_base, struct image_params *iparams));
void linux_prepsyscall __P((struct trapframe *tf, int *args, u_int *code, caddr_t *params));
void linux_sendsig __P((sig_t catcher, int sig, int mask, unsigned code));
/*
* Linux syscalls return negative errno's, we do positive and map them
*/
int bsd_to_linux_errno[ELAST] = {
-0, -1, -2, -3, -4, -5, -6, -7, -8, -9,
-10, -35, -12, -13, -14, -15, -16, -17, -18, -19,
-20, -21, -22, -23, -24, -25, -26, -27, -28, -29,
-30, -31, -32, -33, -34, -11,-115,-114, -88, -89,
-90, -91, -92, -93, -94, -95, -96, -97, -98, -99,
-100,-101,-102,-103,-104,-105,-106,-107,-108,-109,
-110,-111, -40, -36,-112,-113, -39, -11, -87,-122,
-116, -66, -6, -6, -6, -6, -6, -37, -38, -9,
-6,
-0, -1, -2, -3, -4, -5, -6, -7, -8, -9,
-10, -35, -12, -13, -14, -15, -16, -17, -18, -19,
-20, -21, -22, -23, -24, -25, -26, -27, -28, -29,
-30, -31, -32, -33, -34, -11,-115,-114, -88, -89,
-90, -91, -92, -93, -94, -95, -96, -97, -98, -99,
-100,-101,-102,-103,-104,-105,-106,-107,-108,-109,
-110,-111, -40, -36,-112,-113, -39, -11, -87,-122,
-116, -66, -6, -6, -6, -6, -6, -37, -38, -9,
-6,
};
int bsd_to_linux_signal[NSIG] = {
0, LINUX_SIGHUP, LINUX_SIGINT, LINUX_SIGQUIT,
LINUX_SIGILL, LINUX_SIGTRAP, LINUX_SIGABRT, 0,
LINUX_SIGFPE, LINUX_SIGKILL, LINUX_SIGBUS, LINUX_SIGSEGV,
0, LINUX_SIGPIPE, LINUX_SIGALRM, LINUX_SIGTERM,
LINUX_SIGURG, LINUX_SIGSTOP, LINUX_SIGTSTP, LINUX_SIGCONT,
LINUX_SIGCHLD, LINUX_SIGTTIN, LINUX_SIGTTOU, LINUX_SIGIO,
LINUX_SIGXCPU, LINUX_SIGXFSZ, LINUX_SIGVTALRM, LINUX_SIGPROF,
LINUX_SIGWINCH, 0, LINUX_SIGUSR1, LINUX_SIGUSR2
0, LINUX_SIGHUP, LINUX_SIGINT, LINUX_SIGQUIT,
LINUX_SIGILL, LINUX_SIGTRAP, LINUX_SIGABRT, 0,
LINUX_SIGFPE, LINUX_SIGKILL, LINUX_SIGBUS, LINUX_SIGSEGV,
0, LINUX_SIGPIPE, LINUX_SIGALRM, LINUX_SIGTERM,
LINUX_SIGURG, LINUX_SIGSTOP, LINUX_SIGTSTP, LINUX_SIGCONT,
LINUX_SIGCHLD, LINUX_SIGTTIN, LINUX_SIGTTOU, LINUX_SIGIO,
LINUX_SIGXCPU, LINUX_SIGXFSZ, LINUX_SIGVTALRM, LINUX_SIGPROF,
LINUX_SIGWINCH, 0, LINUX_SIGUSR1, LINUX_SIGUSR2
};
int linux_to_bsd_signal[LINUX_NSIG] = {
0, SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGTRAP, SIGABRT, SIGEMT,
SIGFPE, SIGKILL, SIGUSR1, SIGSEGV, SIGUSR2, SIGPIPE, SIGALRM, SIGTERM,
SIGBUS, SIGCHLD, SIGCONT, SIGSTOP, SIGTSTP, SIGTTIN, SIGTTOU, SIGIO,
SIGXCPU, SIGXFSZ, SIGVTALRM, SIGPROF, SIGWINCH, SIGURG, SIGURG, 0
0, SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGTRAP, SIGABRT, SIGEMT,
SIGFPE, SIGKILL, SIGUSR1, SIGSEGV, SIGUSR2, SIGPIPE, SIGALRM, SIGTERM,
SIGBUS, SIGCHLD, SIGCONT, SIGSTOP, SIGTSTP, SIGTTIN, SIGTTOU, SIGIO,
SIGXCPU, SIGXFSZ, SIGVTALRM, SIGPROF, SIGWINCH, SIGURG, SIGURG, 0
};
int linux_fixup(int **stack_base, struct image_params *imgp)
{
int *argv, *envp;
int *argv, *envp;
argv = *stack_base;
envp = *stack_base + (imgp->argc + 1);
(*stack_base)--;
**stack_base = (int)envp;
(*stack_base)--;
**stack_base = (int)argv;
(*stack_base)--;
**stack_base = (int)imgp->argc;
return 0; /* XXX */
argv = *stack_base;
envp = *stack_base + (imgp->argc + 1);
(*stack_base)--;
**stack_base = (int)envp;
(*stack_base)--;
**stack_base = (int)argv;
(*stack_base)--;
**stack_base = (int)imgp->argc;
return 0;
}
extern struct sysent linux_sysent[LINUX_SYS_MAXSYSCALL];
int elf_linux_fixup(int **stack_base, struct image_params *imgp)
{
Elf32_Auxargs *args = (Elf32_Auxargs *)imgp->auxargs;
int *pos;
pos = *stack_base + (imgp->argc + imgp->envc + 2);
if (args->trace) {
AUXARGS_ENTRY(pos, AT_DEBUG, 1);
}
if (args->execfd != -1) {
AUXARGS_ENTRY(pos, AT_EXECFD, args->execfd);
}
AUXARGS_ENTRY(pos, AT_PHDR, args->phdr);
AUXARGS_ENTRY(pos, AT_PHENT, args->phent);
AUXARGS_ENTRY(pos, AT_PHNUM, args->phnum);
AUXARGS_ENTRY(pos, AT_PAGESZ, args->pagesz);
AUXARGS_ENTRY(pos, AT_FLAGS, args->flags);
AUXARGS_ENTRY(pos, AT_ENTRY, args->entry);
AUXARGS_ENTRY(pos, AT_BASE, args->base);
AUXARGS_ENTRY(pos, AT_UID, imgp->proc->p_cred->p_ruid);
AUXARGS_ENTRY(pos, AT_EUID, imgp->proc->p_cred->p_svuid);
AUXARGS_ENTRY(pos, AT_GID, imgp->proc->p_cred->p_rgid);
AUXARGS_ENTRY(pos, AT_EGID, imgp->proc->p_cred->p_svgid);
AUXARGS_ENTRY(pos, AT_NULL, 0);
free(imgp->auxargs, M_TEMP);
imgp->auxargs = NULL;
static void linux_sendsig(sig_t action,
int sig,
int returnmask,
unsigned code);
(*stack_base)--;
**stack_base = (int)imgp->argc;
return 0;
}
extern int _ucodesel, _udatasel;
@ -129,12 +162,8 @@ extern int _ucodesel, _udatasel;
* specified pc, psl.
*/
static void
linux_sendsig(catcher, sig, mask, code)
sig_t catcher;
int sig;
int mask;
unsigned code;
void
linux_sendsig(sig_t catcher, int sig, int mask, unsigned code)
{
register struct proc *p = curproc;
register int *regs;
@ -327,7 +356,7 @@ linux_sigreturn(p, args, retval)
return (EJUSTRETURN);
}
static void
void
linux_prepsyscall(struct trapframe *tf, int *args, u_int *code, caddr_t *params)
{
int i;
@ -339,20 +368,33 @@ linux_prepsyscall(struct trapframe *tf, int *args, u_int *code, caddr_t *params)
*params = NULL; /* no copyin */
}
extern char linux_sigcode[];
extern int linux_szsigcode;
struct sysentvec linux_sysvec = {
sizeof (linux_sysent) / sizeof(linux_sysent[0]),
linux_sysent,
0xff,
NSIG,
bsd_to_linux_signal,
ELAST,
bsd_to_linux_errno,
linux_fixup,
linux_sendsig,
linux_sigcode,
&linux_szsigcode,
linux_prepsyscall,
LINUX_SYS_MAXSYSCALL,
linux_sysent,
0xff,
NSIG,
bsd_to_linux_signal,
ELAST,
bsd_to_linux_errno,
linux_fixup,
linux_sendsig,
linux_sigcode,
&linux_szsigcode,
linux_prepsyscall,
};
struct sysentvec elf_linux_sysvec = {
LINUX_SYS_MAXSYSCALL,
linux_sysent,
0xff,
NSIG,
bsd_to_linux_signal,
ELAST,
bsd_to_linux_errno,
elf_linux_fixup,
linux_sendsig,
linux_sigcode,
&linux_szsigcode,
linux_prepsyscall,
};

4
sys/i386/linux/linux_util.h
View File

@ -28,7 +28,7 @@
*
* from: svr4_util.h,v 1.5 1994/11/18 02:54:31 christos Exp
* from: linux_util.h,v 1.2 1995/03/05 23:23:50 fvdl Exp
* $Id$
* $Id: linux_util.h,v 1.1 1996/03/02 19:38:02 peter Exp $
*/
/*
@ -78,8 +78,6 @@ stackgap_alloc(sgp, sz)
#define DPRINTF(a)
#endif
extern const char linux_emul_path[];
int linux_emul_find __P((struct proc *, caddr_t *, const char *, char *,
char **, int));

705
sys/kern/imgact_elf.c Normal file
View File

@ -0,0 +1,705 @@
/*-
* Copyright (c) 1995-1996 Søren Schmidt
* Copyright (c) 1996 Peter Wemm
* 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
* in this position and unchanged.
* 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. The name of the author may not be used to endorse or promote products
* derived from this software withough 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.
*
* $Id$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/resourcevar.h>
#include <sys/exec.h>
#include <sys/mman.h>
#include <sys/imgact.h>
#include <sys/imgact_elf.h>
#include <sys/kernel.h>
#include <sys/sysent.h>
#include <sys/file.h>
#include <sys/malloc.h>
#include <sys/mount.h>
#include <sys/sysproto.h>
#include <sys/syscall.h>
#include <sys/signalvar.h>
#include <sys/sysctl.h>
#include <vm/vm.h>
#include <vm/vm_kern.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <vm/lock.h>
#include <vm/vm_map.h>
#include <vm/vm_prot.h>
#include <vm/vm_extern.h>
#include <machine/md_var.h>
#include <i386/linux/linux_syscall.h>
#include <i386/linux/linux.h>
#define MAX_PHDR 32 /* XXX enough ? */
static int read_from_vp __P((struct vnode *vp, vm_offset_t offset, caddr_t buf, vm_size_t size));
static int map_pages __P((struct vnode *vp, vm_offset_t offset, vm_offset_t *buf, vm_size_t size));
static void unmap_pages __P((struct vnode *vp, vm_offset_t buf, vm_size_t size));
static int elf_check_header __P((Elf32_Ehdr *hdr, int type));
static int elf_load_section __P((struct vmspace *vmspace, struct vnode *vp, vm_offset_t offset, caddr_t vmaddr, size_t memsz, size_t filsz, vm_prot_t prot));
static int elf_load_file __P((struct proc *p, char *file, u_long *addr, u_long *entry));
static int elf_freebsd_fixup __P((int **stack_base, struct image_params *imgp));
int exec_elf_imgact __P((struct image_params *imgp));
int elf_trace = 0;
SYSCTL_INT(_debug, 1, elf_trace, CTLFLAG_RW, &elf_trace, 0, "");
#define UPRINTF if (elf_trace) uprintf
static struct sysentvec elf_freebsd_sysvec = {
SYS_MAXSYSCALL,
sysent,
0,
0,
0,
0,
0,
elf_freebsd_fixup,
sendsig,
sigcode,
&szsigcode,
0,
};
static Elf32_Interp_info freebsd_interp = {
&elf_freebsd_sysvec,
"/usr/libexec/ld-elf.so.1",
""
};
static Elf32_Interp_info *interp_list[MAX_INTERP] = {
&freebsd_interp,
NULL, NULL, NULL,
NULL, NULL, NULL, NULL
};
int
elf_insert_interp(Elf32_Interp_info *entry)
{
int i;
for (i=1; i<MAX_INTERP; i++) {
if (interp_list[i] == NULL) {
interp_list[i] = entry;
break;
}
}
if (i == MAX_INTERP)
return -1;
return 0;
}
int
elf_remove_interp(Elf32_Interp_info *entry)
{
int i;
for (i=1; i<MAX_INTERP; i++) {
if (interp_list[i] == entry) {
interp_list[i] = NULL;
break;
}
}
if (i == MAX_INTERP)
return -1;
return 0;
}
static int
map_pages(struct vnode *vp, vm_offset_t offset,
vm_offset_t *buf, vm_size_t size)
{
int error, aresid;
vm_offset_t kern_buf;
vm_size_t pageoff;
/*
* The request may not be aligned, and may even cross several
* page boundaries in the file...
*/
pageoff = (offset & PAGE_MASK);
offset -= pageoff; /* start of first aligned page to map */
size += pageoff;
size = round_page(size); /* size of aligned pages to map */
if (error = vm_mmap(kernel_map,
&kern_buf,
size,
VM_PROT_READ,
VM_PROT_READ,
MAP_FILE,
(caddr_t)vp,
offset))
return error;
*buf = kern_buf + pageoff;
return 0;
}
static void
unmap_pages(struct vnode *vp, vm_offset_t buf, vm_size_t size)
{
int error, aresid;
vm_size_t pageoff;
pageoff = (buf & PAGE_MASK);
buf -= pageoff; /* start of first aligned page to map */
size += pageoff;
size = round_page(size);/* size of aligned pages to map */
vm_map_remove(kernel_map, buf, size);
}
static int
elf_check_permissions(struct proc *p, struct vnode *vp)
{
struct vattr attr;
int error;
/*
* Check number of open-for-writes on the file and deny execution
* if there are any.
*/
if (vp->v_writecount) {
return (ETXTBSY);
}
/* Get file attributes */
error = VOP_GETATTR(vp, &attr, p->p_ucred, p);
if (error)
return (error);
/*
* 1) Check if file execution is disabled for the filesystem that this
* file resides on.
* 2) Insure that at least one execute bit is on - otherwise root
* will always succeed, and we don't want to happen unless the
* file really is executable.
* 3) Insure that the file is a regular file.
*/
if ((vp->v_mount->mnt_flag & MNT_NOEXEC) ||
((attr.va_mode & 0111) == 0) ||
(attr.va_type != VREG)) {
return (EACCES);
}
/*
* Zero length files can't be exec'd
*/
if (attr.va_size == 0)
return (ENOEXEC);
/*
* Check for execute permission to file based on current credentials.
* Then call filesystem specific open routine (which does nothing
* in the general case).
*/
error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);
if (error)
return (error);
error = VOP_OPEN(vp, FREAD, p->p_ucred, p);
if (error)
return (error);
return (0);
}
static int
elf_check_header(Elf32_Ehdr *hdr, int type)
{
if (!(hdr->e_ident[EI_MAG0] == ELFMAG0 &&
hdr->e_ident[EI_MAG1] == ELFMAG1 &&
hdr->e_ident[EI_MAG2] == ELFMAG2 &&
hdr->e_ident[EI_MAG3] == ELFMAG3))
return ENOEXEC;
if (hdr->e_machine != EM_386 && hdr->e_machine != EM_486)
return ENOEXEC;
if (hdr->e_type != type)
return ENOEXEC;
return 0;
}
static int
elf_load_section(struct vmspace *vmspace, struct vnode *vp, vm_offset_t offset, caddr_t vmaddr, size_t memsz, size_t filsz, vm_prot_t prot)
{
size_t map_len;
vm_offset_t map_addr;
int error;
unsigned char *data_buf = 0;
size_t copy_len;
map_addr = trunc_page(vmaddr);
if (memsz > filsz)
map_len = trunc_page(offset+filsz) - trunc_page(offset);
else
map_len = round_page(offset+filsz) - trunc_page(offset);
if (error = vm_mmap (&vmspace->vm_map,
&map_addr,
map_len,
prot,
VM_PROT_ALL,
MAP_FILE | MAP_PRIVATE | MAP_FIXED,
(caddr_t)vp,
trunc_page(offset)))
return error;
if (memsz == filsz)
return 0;
/*
* We have to map the remaining bit of the file into the kernel's
* memory map, allocate some anonymous memory, and copy that last
* bit into it. The remaining space should be .bss...
*/
copy_len = (offset + filsz) - trunc_page(offset + filsz);
map_addr = trunc_page(vmaddr + filsz);
map_len = round_page(memsz) - trunc_page(filsz);
if (map_len != 0)
if (error = vm_map_find(&vmspace->vm_map, NULL, 0,
&map_addr, map_len, FALSE,
VM_PROT_ALL, VM_PROT_ALL,0))
return error;
if (error = vm_mmap(kernel_map,
(vm_offset_t *)&data_buf,
PAGE_SIZE,
VM_PROT_READ,
VM_PROT_READ,
MAP_FILE,
(caddr_t)vp,
trunc_page(offset + filsz)))
return error;
error = copyout(data_buf, (caddr_t)map_addr, copy_len);
vm_map_remove(kernel_map, (vm_offset_t)data_buf,
(vm_offset_t)data_buf + PAGE_SIZE);
/*
* Clear the remaining page, we dont need the potential
* garbage from the file in there.
*/
bzero((caddr_t)(map_addr+copy_len), map_len-copy_len);
UPRINTF("bss size %d (%x)\n", map_len-copy_len, map_len-copy_len);
return error;
}
static int
elf_load_file(struct proc *p, char *file, u_long *addr, u_long *entry)
{
Elf32_Ehdr *hdr = NULL;
Elf32_Phdr *phdr = NULL;
struct nameidata nd;
struct vmspace *vmspace = p->p_vmspace;
vm_prot_t prot = 0;
unsigned long text_size = 0, data_size = 0;
unsigned long text_addr = 0, data_addr = 0;
int header_size = 0;
int error, i;
NDINIT(&nd, LOOKUP, LOCKLEAF|FOLLOW, UIO_SYSSPACE, file, p);
if (error = namei(&nd))
goto fail;
if (nd.ni_vp == NULL) {
error = ENOEXEC;
goto fail;
}
/*
* Check permissions, modes, uid, etc on the file, and "open" it.
*/
error = elf_check_permissions(p, nd.ni_vp);
/*
* No longer need this, and it prevents demand paging.
*/
VOP_UNLOCK(nd.ni_vp);
if (error)
goto fail;
/*
* Map in the header
*/
if (error = map_pages(nd.ni_vp, 0, (vm_offset_t *)&hdr, sizeof(hdr)))
goto fail;
/*
* Do we have a valid ELF header ?
*/
if (error = elf_check_header(hdr, ET_DYN))
goto fail;
/*
* ouch, need to bounds check in case user gives us a corrupted
* file with an insane header size
*/
if (hdr->e_phnum > MAX_PHDR) { /* XXX: ever more than this? */
error = ENOEXEC;
goto fail;
}
header_size = hdr->e_phentsize * hdr->e_phnum;
if (error = map_pages(nd.ni_vp, hdr->e_phoff, (vm_offset_t *)&phdr,
header_size))
goto fail;
for (i = 0; i < hdr->e_phnum; i++) {
switch(phdr[i].p_type) {
case PT_NULL: /* NULL section */
UPRINTF ("ELF(file) PT_NULL section\n");
break;
case PT_LOAD: /* Loadable segment */
{
UPRINTF ("ELF(file) PT_LOAD section ");
if (phdr[i].p_flags & PF_X)
prot |= VM_PROT_EXECUTE;
if (phdr[i].p_flags & PF_W)
prot |= VM_PROT_WRITE;
if (phdr[i].p_flags & PF_R)
prot |= VM_PROT_READ;
if (error = elf_load_section(vmspace, nd.ni_vp,
phdr[i].p_offset,
(caddr_t)phdr[i].p_vaddr +
(*addr),
phdr[i].p_memsz,
phdr[i].p_filesz, prot))
goto fail;
/*
* Is this .text or .data ??
*
* We only handle one each of those yet XXX
*/
if (hdr->e_entry >= phdr[i].p_vaddr &&
hdr->e_entry <(phdr[i].p_vaddr+phdr[i].p_memsz)) {
text_size = round_page(phdr[i].p_memsz);
text_addr = trunc_page(phdr[i].p_vaddr+(*addr));
*entry=(unsigned long)hdr->e_entry+(*addr);
UPRINTF(".text <%08x,%08x> entry=%08x\n",
text_addr, text_size, *entry);
} else {
data_size = round_page(phdr[i].p_memsz);
data_addr = trunc_page(phdr[i].p_vaddr+(*addr));
UPRINTF(".data <%08x,%08x>\n",
data_addr, data_size);
}
}
break;
case PT_DYNAMIC:/* Dynamic link information */
UPRINTF ("ELF(file) PT_DYNAMIC section\n");
break;
case PT_INTERP: /* Path to interpreter */
UPRINTF ("ELF(file) PT_INTERP section\n");
break;
case PT_NOTE: /* Note section */
UPRINTF ("ELF(file) PT_NOTE section\n");
break;
case PT_SHLIB: /* Shared lib section */
UPRINTF ("ELF(file) PT_SHLIB section\n");
break;
case PT_PHDR: /* Program header table info */
UPRINTF ("ELF(file) PT_PHDR section\n");
break;
default:
UPRINTF ("ELF(file) %d section ??\n", phdr[i].p_type );
}
}
fail:
if (phdr)
unmap_pages(nd.ni_vp, (vm_offset_t)phdr, header_size);
if (hdr)
unmap_pages(nd.ni_vp, (vm_offset_t)hdr, sizeof(hdr));
return error;
}
int
exec_elf_imgact(struct image_params *imgp)
{
Elf32_Ehdr *hdr = (Elf32_Ehdr *) imgp->image_header;
Elf32_Phdr *phdr, *mapped_phdr = NULL;
Elf32_Auxargs *elf_auxargs = NULL;
struct vmspace *vmspace = imgp->proc->p_vmspace;
vm_prot_t prot = 0;
u_long text_size = 0, data_size = 0;
u_long text_addr = 0, data_addr = 0;
u_long addr, entry = 0, proghdr = 0;
int error, i, header_size = 0, interp_len = 0;
char *interp = NULL;
/*
* Do we have a valid ELF header ?
*/
if (elf_check_header(hdr, ET_EXEC))
return -1;
/*
* From here on down, we return an errno, not -1, as we've
* detected an ELF file.
*/
/*
* ouch, need to bounds check in case user gives us a corrupted
* file with an insane header size
*/
if (hdr->e_phnum > MAX_PHDR) { /* XXX: ever more than this? */
return ENOEXEC;
}
header_size = hdr->e_phentsize * hdr->e_phnum;
if ((hdr->e_phoff > PAGE_SIZE) ||
(hdr->e_phoff + header_size) > PAGE_SIZE) {
/*
* Ouch ! we only get one page full of header...
* Try to map it in ourselves, and see how we go.
*/
if (error = map_pages(imgp->vp, hdr->e_phoff,
(vm_offset_t *)&mapped_phdr, header_size))
return (error);
/*
* Save manual mapping for cleanup
*/
phdr = mapped_phdr;
} else {
phdr = (Elf32_Phdr*)
((char*)(imgp->image_header)+hdr->e_phoff);
}
/*
* From this point on, we may have resources that need to be freed.
*/
if (error = exec_extract_strings(imgp))
goto fail;
exec_new_vmspace(imgp);
for (i = 0; i < hdr->e_phnum; i++) {
switch(phdr[i].p_type) {
case PT_NULL: /* NULL section */
UPRINTF ("ELF PT_NULL section\n");
break;
case PT_LOAD: /* Loadable segment */
{
UPRINTF ("ELF PT_LOAD section ");
if (phdr[i].p_flags & PF_X)
prot |= VM_PROT_EXECUTE;
if (phdr[i].p_flags & PF_W)
prot |= VM_PROT_WRITE;
if (phdr[i].p_flags & PF_R)
prot |= VM_PROT_READ;
if (error = elf_load_section(vmspace, imgp->vp,
phdr[i].p_offset,
(caddr_t)phdr[i].p_vaddr,
phdr[i].p_memsz,
phdr[i].p_filesz, prot))
goto fail;
/*
* Is this .text or .data ??
*
* We only handle one each of those yet XXX
*/
if (hdr->e_entry >= phdr[i].p_vaddr &&
hdr->e_entry <(phdr[i].p_vaddr+phdr[i].p_memsz)) {
text_size = round_page(phdr[i].p_memsz);
text_addr = trunc_page(phdr[i].p_vaddr);
entry = (u_long)hdr->e_entry;
UPRINTF(".text <%08x,%08x> entry=%08x\n",
text_addr, text_size, entry);
} else {
data_size = round_page(phdr[i].p_memsz);
data_addr = trunc_page(phdr[i].p_vaddr);
UPRINTF(".data <%08x,%08x>\n",
data_addr, data_size);
}
}
break;
case PT_DYNAMIC:/* Dynamic link information */
UPRINTF ("ELF PT_DYNAMIC section ??\n");
break;
case PT_INTERP: /* Path to interpreter */
UPRINTF ("ELF PT_INTERP section ");
if (phdr[i].p_filesz > MAXPATHLEN) {
error = ENOEXEC;
goto fail;
}
interp_len = MAXPATHLEN;
if (error = map_pages(imgp->vp, phdr[i].p_offset,
(vm_offset_t *)&interp, interp_len))
goto fail;
UPRINTF("<%s>\n", interp);
break;
case PT_NOTE: /* Note section */
UPRINTF ("ELF PT_NOTE section\n");
break;
case PT_SHLIB: /* Shared lib section */
UPRINTF ("ELF PT_SHLIB section\n");
break;
case PT_PHDR: /* Program header table info */
UPRINTF ("ELF PT_PHDR section <%x>\n", phdr[i].p_vaddr);
proghdr = phdr[i].p_vaddr;
break;
default:
UPRINTF ("ELF %d section ??\n", phdr[i].p_type);
}
}
vmspace->vm_tsize = text_size >> PAGE_SHIFT;
vmspace->vm_taddr = (caddr_t)text_addr;
vmspace->vm_dsize = data_size >> PAGE_SHIFT;
vmspace->vm_daddr = (caddr_t)data_addr;
addr = 2*MAXDSIZ; /* May depend on OS type XXX */
if (interp) {
char path[MAXPATHLEN];
/*
* So which kind of ELF binary do we have at hand
* FreeBSD, SVR4 or Linux ??
*/
for (i=0; i<MAX_INTERP; i++) {
if (interp_list[i] != NULL) {
if (!strcmp(interp, interp_list[i]->path)) {
imgp->proc->p_sysent =
interp_list[i]->sysvec;
strcpy(path, interp_list[i]->emul_path);
strcat(path, interp_list[i]->path);
UPRINTF("interpreter=<%s> %s\n",
interp_list[i]->path,
interp_list[i]->emul_path);
break;
}
}
}
if (i == MAX_INTERP) {
uprintf("ELF interpreter %s not known\n", interp);
error = ENOEXEC;
goto fail;
}
if (error = elf_load_file(imgp->proc,
path,
&addr, /* XXX */
&imgp->entry_addr)) {
uprintf("ELF interpreter %s not found\n", path);
goto fail;
}
}
else
imgp->entry_addr = entry;
/*
* Construct auxargs table (used by the fixup routine)
*/
elf_auxargs = malloc(sizeof(Elf32_Auxargs), M_TEMP, M_WAITOK);
elf_auxargs->execfd = -1;
elf_auxargs->phdr = proghdr;
elf_auxargs->phent = hdr->e_phentsize;
elf_auxargs->phnum = hdr->e_phnum;
elf_auxargs->pagesz = PAGE_SIZE;
elf_auxargs->base = addr;
elf_auxargs->flags = 0;
elf_auxargs->entry = entry;
elf_auxargs->trace = elf_trace;
imgp->auxargs = elf_auxargs;
imgp->interpreted = 0;
/* don't allow modifying the file while we run it */
imgp->vp->v_flag |= VTEXT;
fail:
if (mapped_phdr)
unmap_pages(imgp->vp, (vm_offset_t)mapped_phdr, header_size);
if (interp)
unmap_pages(imgp->vp, (vm_offset_t)interp, interp_len);
return error;
}
static int
elf_freebsd_fixup(int **stack_base, struct image_params *imgp)
{
Elf32_Auxargs *args = (Elf32_Auxargs *)imgp->auxargs;
int *pos;
pos = *stack_base + (imgp->argc + imgp->envc + 2);
if (args->trace) {
AUXARGS_ENTRY(pos, AT_DEBUG, 1);
}
if (args->execfd != -1) {
AUXARGS_ENTRY(pos, AT_EXECFD, args->execfd);
}
AUXARGS_ENTRY(pos, AT_PHDR, args->phdr);
AUXARGS_ENTRY(pos, AT_PHENT, args->phent);
AUXARGS_ENTRY(pos, AT_PHNUM, args->phnum);
AUXARGS_ENTRY(pos, AT_PAGESZ, args->pagesz);
AUXARGS_ENTRY(pos, AT_FLAGS, args->flags);
AUXARGS_ENTRY(pos, AT_ENTRY, args->entry);
AUXARGS_ENTRY(pos, AT_BASE, args->base);
AUXARGS_ENTRY(pos, AT_NULL, 0);
free(imgp->auxargs, M_TEMP);
imgp->auxargs = NULL;
(*stack_base)--;
**stack_base = (int)imgp->argc;
return 0;
}
/*
* Tell kern_execve.c about it, with a little help from the linker.
* Since `const' objects end up in the text segment, TEXT_SET is the
* correct directive to use.
*/
const struct execsw elf_execsw = {exec_elf_imgact, "ELF"};
TEXT_SET(execsw_set, elf_execsw);

25
sys/kern/kern_exec.c
View File

@ -28,7 +28,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: kern_exec.c,v 1.35 1996/02/24 14:32:52 peter Exp $
* $Id: kern_exec.c,v 1.36 1996/03/02 19:38:08 peter Exp $
*/
#include <sys/param.h>
@ -42,6 +42,7 @@
#include <sys/acct.h>
#include <sys/exec.h>
#include <sys/imgact.h>
#include <sys/imgact_elf.h>
#include <sys/wait.h>
#include <sys/malloc.h>
#include <sys/sysent.h>
@ -118,6 +119,7 @@ execve(p, uap, retval)
imgp->vmspace_destroyed = 0;
imgp->interpreted = 0;
imgp->interpreter_name[0] = '\0';
imgp->auxargs = NULL;
/*
* Allocate temporary demand zeroed space for argument and
@ -475,11 +477,24 @@ exec_copyout_strings(imgp)
((caddr_t)arginfo - szsigcode), szsigcode);
/*
* The '+ 2' is for the null pointers at the end of each of the
* arg and env vector sets
* If we have a valid auxargs ptr, prepare some room
* on the stack.
*/
vectp = (char **) (destp -
(imgp->argc + imgp->envc + 2) * sizeof(char *));
if (imgp->auxargs)
/*
* The '+ 2' is for the null pointers at the end of each of the
* arg and env vector sets, and 'AT_COUNT*2' is room for the
* ELF Auxargs data.
*/
vectp = (char **)(destp - (imgp->argc + imgp->envc + 2 +
AT_COUNT*2) * sizeof(char*));
else
/*
* The '+ 2' is for the null pointers at the end of each of the
* arg and env vector sets
*/
vectp = (char **)
(destp - (imgp->argc + imgp->envc + 2) * sizeof(char*));
/*
* vectp also becomes our initial stack base

4
sys/modules/linux/Makefile
View File

@ -1,4 +1,4 @@
# $Id: Makefile,v 1.5 1996/01/27 23:57:06 rgrimes Exp $
# $Id: Makefile,v 1.6 1996/03/02 20:00:35 peter Exp $
.PATH: ${.CURDIR}/../../sys/i386/linux
KMOD= linux_mod
@ -11,7 +11,7 @@ NOMAN=
CFLAGS+= -DLKM -I. -DCOMPAT_43 -DCOMPAT_LINUX #-DDEBUG
CPPFLAGS= -I. -I${.CURDIR}/../../sys
EXPORT_SYMS=_linux_mod
CLEANFILES+= vnode_if.h vnode_if.c linux_genassym.o linux_genassym machine \
linux_assym.h

14
sys/modules/linux/linux.c
View File

@ -25,7 +25,7 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: linux.c,v 1.3 1995/11/13 07:18:38 bde Exp $
* $Id: linux.c,v 1.4 1995/11/14 07:34:18 bde Exp $
*/
#include <sys/param.h>
@ -34,14 +34,24 @@
#include <sys/conf.h>
#include <sys/sysent.h>
#include <sys/lkm.h>
#include <sys/imgact_elf.h>
#include "i386/linux/linux.h"
extern const struct execsw linux_execsw;
MOD_EXEC(linux, -1, (struct execsw*)&linux_execsw);
static Elf32_Interp_info linux_interp = {
&elf_linux_sysvec,
"/lib/ld-linux.so.1",
"/compat/linux"
};
static int
linux_load(struct lkm_table *lkmtp, int cmd)
{
if (elf_insert_interp(&linux_interp))
uprintf("Could not install ELF interpreter entry\n");
uprintf("Linux emulator installed\n");
return 0;
}
@ -49,6 +59,8 @@ linux_load(struct lkm_table *lkmtp, int cmd)
static int
linux_unload(struct lkm_table *lkmtp, int cmd)
{
if (elf_remove_interp(&linux_interp))
uprintf("Could not deinstall ELF interpreter entry\n");
uprintf("Linux emulator removed\n");
return 0;
}

3
sys/sys/imgact.h
View File

@ -30,7 +30,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: imgact.h,v 1.9 1995/05/30 08:14:24 rgrimes Exp $
* $Id: imgact.h,v 1.10 1995/11/06 12:52:37 davidg Exp $
*/
#ifndef _SYS_IMGACT_H_
@ -54,6 +54,7 @@ struct image_params {
char vmspace_destroyed; /* flag - we've blown away original vm space */
char interpreted; /* flag - this executable is interpreted */
char interpreter_name[64]; /* name of the interpreter */
void *auxargs; /* ELF Auxinfo structure pointer */
};
#ifdef KERNEL

213
sys/sys/imgact_elf.h Normal file
View File

@ -0,0 +1,213 @@
/*-
* Copyright (c) 1995-1996 Søren Schmidt
* 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
* in this position and unchanged.
* 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. The name of the author may not be used to endorse or promote products
* derived from this software withough 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.
*
* $Id$
*/
#ifndef _IMGACT_ELF_H_
#define _IMGACT_ELF_H_
typedef u_int32_t Elf32_Addr;
typedef u_int32_t Elf32_Off;
typedef int32_t Elf32_Sword;
typedef u_int32_t Elf32_Word;
typedef u_int16_t Elf32_Half;
extern int elf_trace;
#define EI_NINDENT 16
typedef struct {
unsigned char e_ident[EI_NINDENT]; /* file id */
Elf32_Half e_type; /* type */
Elf32_Half e_machine; /* machine type */
Elf32_Word e_version; /* version number */
Elf32_Addr e_entry; /* entry point */
Elf32_Off e_phoff; /* program hdr offset */
Elf32_Off e_shoff; /* section hdr offset */
Elf32_Word e_flags; /* flags */
Elf32_Half e_ehsize; /* sizeof ehdr */
Elf32_Half e_phentsize; /* program header entry size */
Elf32_Half e_phnum; /* number of program headers */
Elf32_Half e_shentsize; /* section header entry size */
Elf32_Half e_shnum; /* number of section headers */
Elf32_Half e_shstrndx; /* string table index */
} Elf32_Ehdr;
/*
* Values for e_indent entry in struct Elf32_Ehdr.
*/
#define EI_MAG0 0
#define EI_MAG1 1
#define EI_MAG2 2
#define EI_MAG3 3
#define EI_CLASS 4
#define EI_DATA 5
#define EI_VERSION 6
#define ELFMAG0 '\177'
#define ELFMAG1 'E'
#define ELFMAG2 'L'
#define ELFMAG3 'F'
#define ELFCLASSNONE 0 /* invalid class */
#define ELFCLASS32 1 /* 32bit object class */
#define ELFCLASS64 2 /* 64bit object class */
#define ELFDATANONE 0 /* invalid data encoding */
#define ELFDATA2LSB 1 /* little endian */
#define ELFDATA2MSB 2 /* big endian */
/*
* Values for e_version entry in struct Elf32_Ehdr.
*/
#define EV_NONE 0 /* invalid version */
#define EV_CURRENT 1 /* current version */
/*
* Values for e_type entry in struct Elf32_Ehdr.
*/
#define ET_NONE 0
#define ET_REL 1
#define ET_EXEC 2
#define ET_DYN 3
#define ET_CORE 4
#define ET_LOPROC 5
#define ET_HIPROC 6
/*
* Values for e_machine entry in struct Elf32_Ehdr.
*/
#define EM_NONE 0
#define EM_M32 1
#define EM_SPARC 2
#define EM_386 3
#define EM_68K 4
#define EM_88K 5
#define EM_486 6
#define EM_860 7
typedef struct {
Elf32_Word p_type; /* entry type */
Elf32_Off p_offset; /* offset */
Elf32_Addr p_vaddr; /* virtual address */
Elf32_Addr p_paddr; /* physical address */
Elf32_Word p_filesz; /* file size */
Elf32_Word p_memsz; /* memory size */
Elf32_Word p_flags; /* flags */
Elf32_Word p_align; /* memory & file alignment */
} Elf32_Phdr;
/*
* Values for p_type entry in struct Elf32_Phdr.
*/
#define PT_NULL 0
#define PT_LOAD 1
#define PT_DYNAMIC 2
#define PT_INTERP 3
#define PT_NOTE 4
#define PT_SHLIB 5
#define PT_PHDR 6
#define PT_LOPROC 0x70000000
#define PT_HIPROC 0x7fffffff
/*
* Values for p_flags entry in struct Elf32_Phdr.
*/
#define PF_X 0x1
#define PF_W 0x2
#define PF_R 0x4
#define PF_MASKPROC 0xf0000000
/*
* Auxiliary vector entry on initial stack.
*/
typedef struct {
Elf32_Sword a_type;
Elf32_Word a_val;
} Elf32_Auxinfo;
#define AUXARGS_ENTRY(pos, id, val) {suword(pos++, id); suword(pos++, val);}
/*
* Values for a_type in struct Elf32_Auxinfo.
*/
#define AT_NULL 0 /* Terminates the vector */
#define AT_IGNORE 1 /* Ignored */
#define AT_EXECFD 2 /* File descriptor of program to load */
#define AT_PHDR 3 /* Program header of program already loaded */
#define AT_PHENT 4 /* Size of each program header entry */
#define AT_PHNUM 5 /* Number of program header entries */
#define AT_PAGESZ 6 /* Page size in bytes */
#define AT_BASE 7 /* Interpreter's base address */
#define AT_FLAGS 8 /* Flags (unused for i386) */
#define AT_ENTRY 9 /* Where interpreter should transfer control */
/*
* The following non-standard values are used for passing information
* to the (FreeBSD ELF) dynamic linker. Will probably go away soon....
*/
#define AT_BRK 10 /* Starting point for sbrk and brk */
#define AT_DEBUG 11 /* Debugging level */
#define AT_COUNT 15
/*
* The following non-standard values are used in Linux ELF binaries.
*/
#define AT_NOTELF 10 /* Program is not ELF ?? */
#define AT_UID 11 /* Real uid */
#define AT_EUID 12 /* Effective uid */
#define AT_GID 13 /* Real gid */
#define AT_EGID 14 /* Effective gid */
/*
* Structure used to pass infomation from the loader to the
* stack fixup routine.
*/
typedef struct {
Elf32_Sword execfd;
Elf32_Word phdr;
Elf32_Word phent;
Elf32_Word phnum;
Elf32_Word pagesz;
Elf32_Word base;
Elf32_Word flags;
Elf32_Word entry;
Elf32_Word trace;
} Elf32_Auxargs;
typedef struct {
struct sysentvec *sysvec;
char *path;
char *emul_path;
} Elf32_Interp_info;
#define MAX_INTERP 8
int elf_insert_interp __P((Elf32_Interp_info *entry));
int elf_remove_interp __P((Elf32_Interp_info *entry));
#endif /* _IMGACT_ELF_H_ */