Initial version of the Wine preloader, used to reserve memory
areas at startup. Based on the work of Mike McCormack.
diff --git a/configure b/configure
index e512212..8e67365 100755
--- a/configure
+++ b/configure
@@ -14180,31 +14180,44 @@
case $host_cpu in
*i[3456789]86*)
- echo "$as_me:$LINENO: checking whether we can relocate the executable to 0x00110000" >&5
-echo $ECHO_N "checking whether we can relocate the executable to 0x00110000... $ECHO_C" >&6
+ echo "$as_me:$LINENO: checking whether we can relocate the executable to 0x77f00000" >&5
+echo $ECHO_N "checking whether we can relocate the executable to 0x77f00000... $ECHO_C" >&6
if test "${ac_cv_ld_reloc_exec+set}" = set; then
echo $ECHO_N "(cached) $ECHO_C" >&6
else
- saved_CFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS -Wl,--section-start,.interp=0x00110400"
- if test "$cross_compiling" = yes; then
- ac_cv_ld_reloc_exec="no"
-else
- cat >conftest.$ac_ext <<_ACEOF
+ ac_wine_try_cflags_saved=$CFLAGS
+CFLAGS="$CFLAGS -Wl,--section-start,.interp=0x77f00400"
+cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
-#include <unistd.h>
- int main() { return (sbrk(32*1024*1024) == (void *)-1); }
+
+int
+main ()
+{
+
+ ;
+ return 0;
+}
_ACEOF
-rm -f conftest$ac_exeext
+rm -f conftest.$ac_objext conftest$ac_exeext
if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
- (eval $ac_link) 2>&5
+ (eval $ac_link) 2>conftest.er1
+ ac_status=$?
+ grep -v '^ *+' conftest.er1 >conftest.err
+ rm -f conftest.er1
+ cat conftest.err >&5
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
+ { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
- (exit $ac_status); } && { ac_try='./conftest$ac_exeext'
+ (exit $ac_status); }; } &&
+ { ac_try='test -s conftest$ac_exeext'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@@ -14212,22 +14225,20 @@
(exit $ac_status); }; }; then
ac_cv_ld_reloc_exec="yes"
else
- echo "$as_me: program exited with status $ac_status" >&5
-echo "$as_me: failed program was:" >&5
+ echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
-( exit $ac_status )
ac_cv_ld_reloc_exec="no"
fi
-rm -f core *.core gmon.out bb.out conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
-fi
- CFLAGS="$saved_CFLAGS"
+rm -f conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+CFLAGS=$ac_wine_try_cflags_saved
fi
echo "$as_me:$LINENO: result: $ac_cv_ld_reloc_exec" >&5
echo "${ECHO_T}$ac_cv_ld_reloc_exec" >&6
if test "$ac_cv_ld_reloc_exec" = "yes"
then
- LDEXECFLAGS="$LDEXECFLAGS -Wl,--section-start,.interp=0x00110400"
+ LDEXECFLAGS="$LDEXECFLAGS -Wl,--section-start,.interp=0x77f00400"
fi
;;
esac
@@ -14528,7 +14539,7 @@
case $host_os in
linux*)
- WINE_BINARIES="wine-glibc wine-kthread wine-pthread"
+ WINE_BINARIES="wine-glibc wine-kthread wine-pthread wine-preloader"
MAIN_BINARY="wine-glibc"
diff --git a/configure.ac b/configure.ac
index 08b0254..3ce7c74 100644
--- a/configure.ac
+++ b/configure.ac
@@ -905,16 +905,12 @@
case $host_cpu in
*i[[3456789]]86*)
- AC_CACHE_CHECK([whether we can relocate the executable to 0x00110000], ac_cv_ld_reloc_exec,
- [saved_CFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS -Wl,--section-start,.interp=0x00110400"
- AC_TRY_RUN([#include <unistd.h>
- int main() { return (sbrk(32*1024*1024) == (void *)-1); }],
- ac_cv_ld_reloc_exec="yes", ac_cv_ld_reloc_exec="no", ac_cv_ld_reloc_exec="no")
- CFLAGS="$saved_CFLAGS"])
+ AC_CACHE_CHECK([whether we can relocate the executable to 0x77f00000], ac_cv_ld_reloc_exec,
+ [WINE_TRY_CFLAGS([-Wl,--section-start,.interp=0x77f00400],
+ ac_cv_ld_reloc_exec="yes", ac_cv_ld_reloc_exec="no")])
if test "$ac_cv_ld_reloc_exec" = "yes"
then
- LDEXECFLAGS="$LDEXECFLAGS -Wl,--section-start,.interp=0x00110400"
+ LDEXECFLAGS="$LDEXECFLAGS -Wl,--section-start,.interp=0x77f00400"
fi
;;
esac
@@ -980,7 +976,7 @@
case $host_os in
linux*)
- AC_SUBST(WINE_BINARIES,"wine-glibc wine-kthread wine-pthread")
+ AC_SUBST(WINE_BINARIES,"wine-glibc wine-kthread wine-pthread wine-preloader")
AC_SUBST(MAIN_BINARY,"wine-glibc")
;;
*)
diff --git a/dlls/kernel/process.c b/dlls/kernel/process.c
index d34e00e..7d0048a 100644
--- a/dlls/kernel/process.c
+++ b/dlls/kernel/process.c
@@ -1462,10 +1462,10 @@
if (argv && envp)
{
/* first, try for a WINELOADER environment variable */
- argv[0] = getenv("WINELOADER");
- if (argv[0]) execve( argv[0], argv, envp );
+ const char *loader = getenv("WINELOADER");
+ if (loader) wine_exec_wine_binary( loader, argv, envp, TRUE );
/* now use the standard search strategy */
- wine_exec_wine_binary( NULL, argv, envp );
+ wine_exec_wine_binary( NULL, argv, envp, TRUE );
}
err = errno;
write( execfd[1], &err, sizeof(err) );
diff --git a/dlls/ntdll/server.c b/dlls/ntdll/server.c
index cb38458..dd8296b 100644
--- a/dlls/ntdll/server.c
+++ b/dlls/ntdll/server.c
@@ -512,7 +512,7 @@
" specified in the WINESERVER environment variable", p );
}
/* now use the standard search strategy */
- wine_exec_wine_binary( argv[0], argv, NULL );
+ wine_exec_wine_binary( argv[0], argv, NULL, FALSE );
fatal_error( "could not exec wineserver\n" );
}
waitpid( pid, &status, 0 );
@@ -703,7 +703,7 @@
argv[2] = "--prefix";
argv[3] = tmp_dir;
argv[4] = NULL;
- wine_exec_wine_binary( argv[0], (char **)argv, NULL );
+ wine_exec_wine_binary( argv[0], (char **)argv, NULL, FALSE );
rmdir( tmp_dir );
fatal_perror( "could not exec wineprefixcreate" );
}
diff --git a/include/wine/library.h b/include/wine/library.h
index 8eef5398..93802b8 100644
--- a/include/wine/library.h
+++ b/include/wine/library.h
@@ -33,7 +33,7 @@
extern const char *wine_get_server_dir(void);
extern const char *wine_get_user_name(void);
extern void wine_init_argv0_path( const char *argv0 );
-extern void wine_exec_wine_binary( const char *name, char **argv, char **envp );
+extern void wine_exec_wine_binary( const char *name, char **argv, char **envp, int use_preloader );
/* dll loading */
diff --git a/libs/wine/config.c b/libs/wine/config.c
index c6ab19e..5382079 100644
--- a/libs/wine/config.c
+++ b/libs/wine/config.c
@@ -271,20 +271,50 @@
return user_name;
}
+/* exec a binary using the preloader if requested; helper for wine_exec_wine_binary */
+static void preloader_exec( char **argv, char **envp, int use_preloader )
+{
+#ifdef linux
+ if (use_preloader)
+ {
+ static const char preloader[] = "wine-preloader";
+ char *p, *full_name;
+
+ if (!(p = strrchr( argv[0], '/' ))) p = argv[0];
+ else p++;
+
+ full_name = xmalloc( p - argv[0] + sizeof(preloader) );
+ memcpy( full_name, argv[0], p - argv[0] );
+ memcpy( full_name + (p - argv[0]), preloader, sizeof(preloader) );
+ if (envp) execve( full_name, argv, envp );
+ else execv( full_name, argv );
+ free( full_name );
+ return;
+ }
+#else
+ if (envp) execve( argv[0], argv, envp );
+ else execv( argv[0], argv );
+#endif
+}
+
/* exec a wine internal binary (either the wine loader or the wine server) */
-/* if name is null, default to the name of the current binary */
-void wine_exec_wine_binary( const char *name, char **argv, char **envp )
+void wine_exec_wine_binary( const char *name, char **argv, char **envp, int use_preloader )
{
const char *path, *pos, *ptr;
- if (!envp) envp = environ;
- if (!name) name = argv0_name;
+ if (name && strchr( name, '/' ))
+ {
+ argv[0] = (char *)name;
+ preloader_exec( argv, envp, use_preloader );
+ return;
+ }
+ else if (!name) name = argv0_name;
/* first, try bin directory */
argv[0] = xmalloc( sizeof(BINDIR "/") + strlen(name) );
strcpy( argv[0], BINDIR "/" );
strcat( argv[0], name );
- execve( argv[0], argv, envp );
+ preloader_exec( argv, envp, use_preloader );
free( argv[0] );
/* now try the path of argv0 of the current binary */
@@ -293,7 +323,7 @@
argv[0] = xmalloc( strlen(argv0_path) + strlen(name) + 1 );
strcpy( argv[0], argv0_path );
strcat( argv[0], name );
- execve( argv[0], argv, envp );
+ preloader_exec( argv, envp, use_preloader );
free( argv[0] );
}
@@ -310,7 +340,7 @@
memcpy( argv[0], pos, ptr - pos );
strcpy( argv[0] + (ptr - pos), "/" );
strcat( argv[0] + (ptr - pos), name );
- execve( argv[0], argv, envp );
+ preloader_exec( argv, envp, use_preloader );
pos = ptr;
}
free( argv[0] );
diff --git a/loader/.cvsignore b/loader/.cvsignore
index 8e637dd..cc4ff21 100644
--- a/loader/.cvsignore
+++ b/loader/.cvsignore
@@ -2,4 +2,5 @@
wine
wine-glibc
wine-kthread
+wine-preloader
wine-pthread
diff --git a/loader/Makefile.in b/loader/Makefile.in
index 356da17..5a5fb30 100644
--- a/loader/Makefile.in
+++ b/loader/Makefile.in
@@ -8,6 +8,7 @@
glibc.c \
kthread.c \
main.c \
+ preloader.c \
pthread.c
KTHREAD_OBJS = kthread.o main.o
@@ -24,7 +25,10 @@
LDEXECFLAGS = @LDEXECFLAGS@
wine-glibc: glibc.o Makefile.in
- $(CC) -o $@ $(LDEXECFLAGS) glibc.o $(LIBWINE) $(LIBPORT) $(LIBPTHREAD) $(EXTRALIBS) $(LDFLAGS)
+ $(CC) -o $@ glibc.o $(LIBWINE) $(LIBPORT) $(LIBPTHREAD) $(EXTRALIBS) $(LDFLAGS)
+
+wine-preloader: preloader.o Makefile.in
+ $(CC) -o $@ -static -nostartfiles -Wl,-Ttext=0x78000000 preloader.o $(LIBPORT) $(LDFLAGS)
wine-kthread: $(KTHREAD_OBJS) Makefile.in
$(CC) -o $@ $(LDEXECFLAGS) $(KTHREAD_OBJS) $(LIBWINE) $(LIBPORT) $(EXTRALIBS) $(LDFLAGS)
diff --git a/loader/glibc.c b/loader/glibc.c
index 9d98d74..0cdf408 100644
--- a/loader/glibc.c
+++ b/loader/glibc.c
@@ -93,13 +93,12 @@
strcpy( new_loader, "WINELOADER=" );
strcat( new_loader, new_name );
putenv( new_loader );
- argv[0] = new_name;
- execv( argv[0], argv );
+ wine_exec_wine_binary( new_name, argv, NULL, TRUE );
}
else
{
wine_init_argv0_path( argv[0] );
- wine_exec_wine_binary( threads, argv, NULL );
+ wine_exec_wine_binary( threads, argv, NULL, TRUE );
}
fprintf( stderr, "wine: could not exec %s\n", argv[0] );
exit(1);
diff --git a/loader/main.c b/loader/main.c
index f50100e..cd45733 100644
--- a/loader/main.c
+++ b/loader/main.c
@@ -21,6 +21,10 @@
#include <stdio.h>
#include <stdlib.h>
#include "wine/library.h"
+#include "main.h"
+
+/* the preloader will set this variable */
+const struct wine_preload_info *wine_main_preload_info = NULL;
/**********************************************************************
* main
@@ -28,6 +32,14 @@
int main( int argc, char *argv[] )
{
char error[1024];
+ int i;
+
+ if (wine_main_preload_info)
+ {
+ for (i = 0; wine_main_preload_info[i].size; i++)
+ wine_mmap_add_reserved_area( wine_main_preload_info[i].addr,
+ wine_main_preload_info[i].size );
+ }
wine_init( argc, argv, error, sizeof(error) );
fprintf( stderr, "wine: failed to initialize: %s\n", error );
diff --git a/loader/main.h b/loader/main.h
new file mode 100644
index 0000000..d78ec5b
--- /dev/null
+++ b/loader/main.h
@@ -0,0 +1,31 @@
+/*
+ * Definitions for Wine main program
+ *
+ * Copyright 2004 Mike McCormack for Codeweavers
+ * Copyright 2004 Alexandre Julliard
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef __WINE_LOADER_MAIN_H
+#define __WINE_LOADER_MAIN_H
+
+struct wine_preload_info
+{
+ void *addr;
+ size_t size;
+};
+
+#endif /* __WINE_LOADER_MAIN_H */
diff --git a/loader/preloader.c b/loader/preloader.c
new file mode 100644
index 0000000..2ce5676
--- /dev/null
+++ b/loader/preloader.c
@@ -0,0 +1,645 @@
+/*
+ * Preloader for ld.so
+ *
+ * Copyright (C) 1995,96,97,98,99,2000,2001,2002 Free Software Foundation, Inc.
+ * Copyright (C) 2004 Mike McCormack for Codeweavers
+ * Copyright (C) 2004 Alexandre Julliard
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/*
+ * Design notes
+ *
+ * The goal of this program is to be a workaround for exec-shield, as used
+ * by the Linux kernel distributed with Fedora Core and other distros.
+ *
+ * To do this, we implement our own shared object loader that reserves memory
+ * that is important to Wine, and then loads the main binary and its ELF
+ * interpreter.
+ *
+ * We will try to set up the stack and memory area so that the program that
+ * loads after us (eg. the wine binary) never knows we were here, except that
+ * areas of memory it needs are already magically reserved.
+ *
+ * The following memory areas are important to Wine:
+ * 0x00000000 - 0x00110000 the DOS area
+ * 0x80000000 - 0x81000000 the shared heap
+ * ??? - ??? the PE binary load address (usually starting at 0x00400000)
+ *
+ * If this program is used as the shared object loader, the only difference
+ * that the loaded programs should see is that this loader will be mapped
+ * into memory when it starts.
+ */
+
+/*
+ * References (things I consulted to understand how ELF loading works):
+ *
+ * glibc 2.3.2 elf/dl-load.c
+ * http://www.gnu.org/directory/glibc.html
+ *
+ * Linux 2.6.4 fs/binfmt_elf.c
+ * ftp://ftp.kernel.org/pub/linux/kernel/v2.6/linux-2.6.4.tar.bz2
+ *
+ * Userland exec, by <grugq@hcunix.net>
+ * http://cert.uni-stuttgart.de/archive/bugtraq/2004/01/msg00002.html
+ *
+ * The ELF specification:
+ * http://www.linuxbase.org/spec/booksets/LSB-Embedded/LSB-Embedded/book387.html
+ */
+
+#include "config.h"
+#include "wine/port.h"
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#ifdef HAVE_SYS_MMAN_H
+# include <sys/mman.h>
+#endif
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+#ifdef HAVE_ELF_H
+# include <elf.h>
+#endif
+#ifdef HAVE_LINK_H
+# include <link.h>
+#endif
+#ifdef HAVE_SYS_LINK_H
+# include <sys/link.h>
+#endif
+
+#include "main.h"
+
+/* ELF definitions */
+#define ELF_PREFERRED_ADDRESS(loader, maplength, mapstartpref) (mapstartpref)
+#define ELF_FIXED_ADDRESS(loader, mapstart) ((void) 0)
+
+#define MAP_BASE_ADDR(l) 0
+
+#ifndef MAP_COPY
+#define MAP_COPY MAP_PRIVATE
+#endif
+#ifndef MAP_NORESERVE
+#define MAP_NORESERVE 0
+#endif
+
+static struct wine_preload_info preload_info[] =
+{
+ { (void *)0x00000000, 0x00110000 }, /* DOS area */
+ { (void *)0x80000000, 0x01000000 }, /* shared heap */
+ { (void *)0x00110000, 0x0fef0000 }, /* PE exe range (FIXME) */
+ { 0, 0 } /* end of list */
+};
+
+/* debugging */
+#undef DUMP_SEGMENTS
+#undef DUMP_AUX_INFO
+#undef DUMP_SYMS
+
+/* older systems may not define these */
+#ifndef PT_TLS
+#define PT_TLS 7
+#endif
+
+static unsigned int page_size, page_mask;
+
+struct wld_link_map {
+ ElfW(Addr) l_addr;
+ ElfW(Dyn) *l_ld;
+ const ElfW(Phdr) *l_phdr;
+ ElfW(Addr) l_entry;
+ ElfW(Half) l_ldnum;
+ ElfW(Half) l_phnum;
+ ElfW(Addr) l_map_start, l_map_end;
+ ElfW(Addr) l_interp;
+};
+
+
+/*
+ * The _start function is the entry and exit point of this program
+ *
+ * It calls wld_start, passing a pointer to the args it receives
+ * then jumps to the address wld_start returns after removing the
+ * first argv[] value, and decrementing argc
+ */
+void _start();
+extern char _end[];
+__ASM_GLOBAL_FUNC(_start,
+ "\tcall wld_start\n"
+ "\tpush %eax\n"
+ "\txor %eax,%eax\n"
+ "\txor %ecx,%ecx\n"
+ "\txor %edx,%edx\n"
+ "\tret\n")
+
+/*
+ * wld_printf - just the basics
+ *
+ * %x prints a hex number
+ * %s prints a string
+ */
+static void wld_vsprintf(char *str, char *fmt, va_list args )
+{
+ char *p = fmt;
+
+ while( *p )
+ {
+ if( *p == '%' )
+ {
+ p++;
+ if( *p == 'x' )
+ {
+ int ch, i, x = va_arg( args, int );
+ for(i=7; i>=0; i--)
+ {
+ ch = (x>>(i*4))&0xf;
+ ch += '0';
+ if(ch>'9')
+ ch+=('A'-10-'0');
+ *str++ = ch;
+ }
+ }
+ else if( *p == 's' )
+ {
+ char *s = va_arg( args, char * );
+ while(*s)
+ *str++ = *s++;
+ }
+ else if( *p == 0 )
+ break;
+ p++;
+ }
+ *str++ = *p++;
+ }
+ *str = 0;
+}
+
+static void wld_printf(char *fmt, ... )
+{
+ va_list args;
+ char buffer[256];
+
+ va_start( args, fmt );
+ wld_vsprintf(buffer, fmt, args );
+ va_end( args );
+ write(2, buffer, strlen(buffer));
+}
+
+static void fatal_error(char *fmt, ... )
+{
+ va_list args;
+ char buffer[256];
+
+ va_start( args, fmt );
+ wld_vsprintf(buffer, fmt, args );
+ va_end( args );
+ write(2, buffer, strlen(buffer));
+ _exit(1);
+}
+
+#ifdef DUMP_AUX_INFO
+/*
+ * Dump interesting bits of the ELF auxv_t structure that is passed
+ * as the 4th parameter to the _start function
+ */
+static void dump_auxiliary( ElfW(auxv_t) *av )
+{
+ for ( ; av->a_type != AT_NULL; av++)
+ switch (av->a_type)
+ {
+ case AT_PAGESZ:
+ wld_printf("AT_PAGESZ = %x\n",av->a_un.a_val);
+ break;
+ case AT_PHDR:
+ wld_printf("AT_PHDR = %x\n",av->a_un.a_ptr);
+ break;
+ case AT_PHNUM:
+ wld_printf("AT_PHNUM = %x\n",av->a_un.a_val);
+ break;
+ case AT_ENTRY:
+ wld_printf("AT_ENTRY = %x\n",av->a_un.a_val);
+ break;
+ case AT_BASE:
+ wld_printf("AT_BASE = %x\n",av->a_un.a_val);
+ break;
+ }
+}
+#endif
+
+/*
+ * set_auxiliary
+ *
+ * Set a field of the auxiliary structure
+ */
+static void set_auxiliary( ElfW(auxv_t) *av, int type, long int val )
+{
+ for ( ; av->a_type != AT_NULL; av++)
+ if( av->a_type == type )
+ av->a_un.a_val = val;
+}
+
+/*
+ * get_auxiliary
+ *
+ * Get a field of the auxiliary structure
+ */
+static int get_auxiliary( ElfW(auxv_t) *av, int type, int *val )
+{
+ for ( ; av->a_type != AT_NULL; av++)
+ if( av->a_type == type )
+ {
+ *val = av->a_un.a_val;
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * map_so_lib
+ *
+ * modelled after _dl_map_object_from_fd() from glibc-2.3.1/elf/dl-load.c
+ *
+ * This function maps the segments from an ELF object, and optionally
+ * stores information about the mapping into the auxv_t structure.
+ */
+static void map_so_lib( const char *name, struct wld_link_map *l)
+{
+ int fd;
+ unsigned char buf[0x800];
+ ElfW(Ehdr) *header = (ElfW(Ehdr)*)buf;
+ ElfW(Phdr) *phdr, *ph;
+ /* Scan the program header table, collecting its load commands. */
+ struct loadcmd
+ {
+ ElfW(Addr) mapstart, mapend, dataend, allocend;
+ off_t mapoff;
+ int prot;
+ } loadcmds[16], *c;
+ size_t nloadcmds = 0, maplength;
+
+ fd = open( name, O_RDONLY );
+ if (fd == -1) fatal_error("%s: could not open\n", name );
+
+ if (read( fd, buf, sizeof(buf) ) != sizeof(buf))
+ fatal_error("%s: failed to read ELF header\n", name);
+
+ phdr = (void*) (((unsigned char*)buf) + header->e_phoff);
+
+ if( ( header->e_ident[0] != 0x7f ) ||
+ ( header->e_ident[1] != 'E' ) ||
+ ( header->e_ident[2] != 'L' ) ||
+ ( header->e_ident[3] != 'F' ) )
+ fatal_error( "%s: not an ELF binary... don't know how to load it\n", name );
+
+ if( header->e_machine != EM_386 )
+ fatal_error("%s: not an i386 ELF binary... don't know how to load it\n", name );
+
+ if (header->e_phnum > sizeof(loadcmds)/sizeof(loadcmds[0]))
+ fatal_error( "%s: oops... not enough space for load commands\n", name );
+
+ maplength = header->e_phnum * sizeof (ElfW(Phdr));
+ if (header->e_phoff + maplength > sizeof(buf))
+ fatal_error( "%s: oops... not enough space for ELF headers\n", name );
+
+ l->l_ld = 0;
+ l->l_addr = 0;
+ l->l_phdr = 0;
+ l->l_phnum = header->e_phnum;
+ l->l_entry = header->e_entry;
+ l->l_interp = 0;
+
+ for (ph = phdr; ph < &phdr[l->l_phnum]; ++ph)
+ {
+
+#ifdef DUMP_SEGMENTS
+ wld_printf( "ph = %x\n", ph );
+ wld_printf( " p_type = %x\n", ph->p_type );
+ wld_printf( " p_flags = %x\n", ph->p_flags );
+ wld_printf( " p_offset = %x\n", ph->p_offset );
+ wld_printf( " p_vaddr = %x\n", ph->p_vaddr );
+ wld_printf( " p_paddr = %x\n", ph->p_paddr );
+ wld_printf( " p_filesz = %x\n", ph->p_filesz );
+ wld_printf( " p_memsz = %x\n", ph->p_memsz );
+ wld_printf( " p_align = %x\n", ph->p_align );
+#endif
+
+ switch (ph->p_type)
+ {
+ /* These entries tell us where to find things once the file's
+ segments are mapped in. We record the addresses it says
+ verbatim, and later correct for the run-time load address. */
+ case PT_DYNAMIC:
+ l->l_ld = (void *) ph->p_vaddr;
+ l->l_ldnum = ph->p_memsz / sizeof (Elf32_Dyn);
+ break;
+
+ case PT_PHDR:
+ l->l_phdr = (void *) ph->p_vaddr;
+ break;
+
+ case PT_LOAD:
+ {
+ if ((ph->p_align & page_mask) != 0)
+ fatal_error( "%s: ELF load command alignment not page-aligned\n", name );
+
+ if (((ph->p_vaddr - ph->p_offset) & (ph->p_align - 1)) != 0)
+ fatal_error( "%s: ELF load command address/offset not properly aligned\n", name );
+
+ c = &loadcmds[nloadcmds++];
+ c->mapstart = ph->p_vaddr & ~(ph->p_align - 1);
+ c->mapend = ((ph->p_vaddr + ph->p_filesz + page_mask) & ~page_mask);
+ c->dataend = ph->p_vaddr + ph->p_filesz;
+ c->allocend = ph->p_vaddr + ph->p_memsz;
+ c->mapoff = ph->p_offset & ~(ph->p_align - 1);
+
+ c->prot = 0;
+ if (ph->p_flags & PF_R)
+ c->prot |= PROT_READ;
+ if (ph->p_flags & PF_W)
+ c->prot |= PROT_WRITE;
+ if (ph->p_flags & PF_X)
+ c->prot |= PROT_EXEC;
+ }
+ break;
+
+ case PT_INTERP:
+ l->l_interp = ph->p_vaddr;
+ break;
+
+ case PT_TLS:
+ /*
+ * We don't need to set anything up because we're
+ * emulating the kernel, not ld-linux.so.2
+ * The ELF loader will set up the TLS data itself.
+ */
+ case PT_SHLIB:
+ case PT_NOTE:
+ default:
+ break;
+ }
+ }
+
+ /* Now process the load commands and map segments into memory. */
+ c = loadcmds;
+
+ /* Length of the sections to be loaded. */
+ maplength = loadcmds[nloadcmds - 1].allocend - c->mapstart;
+
+ if( header->e_type == ET_DYN )
+ {
+ ElfW(Addr) mappref;
+ mappref = (ELF_PREFERRED_ADDRESS (loader, maplength, c->mapstart)
+ - MAP_BASE_ADDR (l));
+
+ /* Remember which part of the address space this object uses. */
+ l->l_map_start = (ElfW(Addr)) mmap ((void *) mappref, maplength,
+ c->prot, MAP_COPY | MAP_FILE,
+ fd, c->mapoff);
+ /* wld_printf("set : offset = %x\n", c->mapoff); */
+ /* wld_printf("l->l_map_start = %x\n", l->l_map_start); */
+
+ l->l_map_end = l->l_map_start + maplength;
+ l->l_addr = l->l_map_start - c->mapstart;
+
+ mprotect ((caddr_t) (l->l_addr + c->mapend),
+ loadcmds[nloadcmds - 1].allocend - c->mapend,
+ PROT_NONE);
+ goto postmap;
+ }
+ else
+ {
+ char *preloader_start = (char *)_start - ((unsigned int)_start & page_mask);
+ char *preloader_end = (char *)((unsigned int)(_end + page_mask) & ~page_mask);
+
+ /* sanity check */
+ if ((char *)c->mapstart + maplength > preloader_start &&
+ (char *)c->mapstart <= preloader_end)
+ fatal_error( "%s: binary overlaps preloader (%x-%x)\n",
+ name, c->mapstart, (char *)c->mapstart + maplength );
+
+ ELF_FIXED_ADDRESS (loader, c->mapstart);
+ }
+
+ /* Remember which part of the address space this object uses. */
+ l->l_map_start = c->mapstart + l->l_addr;
+ l->l_map_end = l->l_map_start + maplength;
+
+ while (c < &loadcmds[nloadcmds])
+ {
+ if (c->mapend > c->mapstart)
+ /* Map the segment contents from the file. */
+ mmap ((void *) (l->l_addr + c->mapstart),
+ c->mapend - c->mapstart, c->prot,
+ MAP_FIXED | MAP_COPY | MAP_FILE, fd, c->mapoff);
+
+ postmap:
+ if (l->l_phdr == 0
+ && (ElfW(Off)) c->mapoff <= header->e_phoff
+ && ((size_t) (c->mapend - c->mapstart + c->mapoff)
+ >= header->e_phoff + header->e_phnum * sizeof (ElfW(Phdr))))
+ /* Found the program header in this segment. */
+ l->l_phdr = (void *)(unsigned int) (c->mapstart + header->e_phoff - c->mapoff);
+
+ if (c->allocend > c->dataend)
+ {
+ /* Extra zero pages should appear at the end of this segment,
+ after the data mapped from the file. */
+ ElfW(Addr) zero, zeroend, zeropage;
+
+ zero = l->l_addr + c->dataend;
+ zeroend = l->l_addr + c->allocend;
+ zeropage = (zero + page_mask) & ~page_mask;
+
+ /*
+ * This is different from the dl-load load...
+ * ld-linux.so.2 relies on the whole page being zero'ed
+ */
+ zeroend = (zeroend + page_mask) & ~page_mask;
+
+ if (zeroend < zeropage)
+ {
+ /* All the extra data is in the last page of the segment.
+ We can just zero it. */
+ zeropage = zeroend;
+ }
+
+ if (zeropage > zero)
+ {
+ /* Zero the final part of the last page of the segment. */
+ if ((c->prot & PROT_WRITE) == 0)
+ {
+ /* Dag nab it. */
+ mprotect ((caddr_t) (zero & ~page_mask), page_size, c->prot|PROT_WRITE);
+ }
+ memset ((void *) zero, '\0', zeropage - zero);
+ if ((c->prot & PROT_WRITE) == 0)
+ mprotect ((caddr_t) (zero & ~page_mask), page_size, c->prot);
+ }
+
+ if (zeroend > zeropage)
+ {
+ /* Map the remaining zero pages in from the zero fill FD. */
+ caddr_t mapat;
+ mapat = mmap ((caddr_t) zeropage, zeroend - zeropage,
+ c->prot, MAP_ANON|MAP_PRIVATE|MAP_FIXED,
+ -1, 0);
+ }
+ }
+
+ ++c;
+ }
+
+ if (l->l_phdr == NULL) fatal_error("no program header\n");
+
+ l->l_phdr = (void *)((ElfW(Addr))l->l_phdr + l->l_addr);
+ l->l_entry += l->l_addr;
+
+ close( fd );
+}
+
+
+/*
+ * Find a symbol in the symbol table of the executable loaded
+ */
+static void *find_symbol( const ElfW(Phdr) *phdr, int num, char *var )
+{
+ const ElfW(Dyn) *dyn = NULL;
+ const ElfW(Phdr) *ph;
+ const ElfW(Sym) *symtab = NULL;
+ const char *strings = NULL;
+ Elf_Symndx i, symtabend = 0;
+
+ /* check the values */
+#ifdef DUMP_SYMS
+ wld_printf("%x %x\n", phdr, num );
+#endif
+ if( ( phdr == NULL ) || ( num == 0 ) )
+ {
+ wld_printf("could not find PT_DYNAMIC header entry\n");
+ return NULL;
+ }
+
+ /* parse the (already loaded) ELF executable's header */
+ for (ph = phdr; ph < &phdr[num]; ++ph)
+ {
+ if( PT_DYNAMIC == ph->p_type )
+ {
+ dyn = (void *) ph->p_vaddr;
+ num = ph->p_memsz / sizeof (Elf32_Dyn);
+ break;
+ }
+ }
+ if( !dyn ) return NULL;
+
+ while( dyn->d_tag )
+ {
+ if( dyn->d_tag == DT_STRTAB )
+ strings = (const char*) dyn->d_un.d_ptr;
+ if( dyn->d_tag == DT_SYMTAB )
+ symtab = (const ElfW(Sym) *)dyn->d_un.d_ptr;
+ if( dyn->d_tag == DT_HASH )
+ symtabend = *((const Elf_Symndx *)dyn->d_un.d_ptr + 1);
+#ifdef DUMP_SYMS
+ wld_printf("%x %x\n", dyn->d_tag, dyn->d_un.d_ptr );
+#endif
+ dyn++;
+ }
+
+ if( (!symtab) || (!strings) ) return NULL;
+
+ for (i = 0; i < symtabend; i++)
+ {
+ if( ( ELF32_ST_BIND(symtab[i].st_info) == STT_OBJECT ) &&
+ ( 0 == strcmp( strings+symtab[i].st_name, var ) ) )
+ {
+#ifdef DUMP_SYMS
+ wld_printf("Found %s -> %x\n", strings+symtab[i].st_name, symtab[i].st_value );
+#endif
+ return (void*)symtab[i].st_value;
+ }
+ }
+ return NULL;
+}
+
+/*
+ * wld_start
+ *
+ * Repeat the actions the kernel would do when loading a dynamically linked .so
+ * Load the binary and then its ELF interpreter.
+ * Note, we assume that the binary is a dynamically linked ELF shared object.
+ */
+void* wld_start( int argc, ... )
+{
+ int i;
+ char **argv, **p;
+ char *interp;
+ ElfW(auxv_t)* av;
+ struct wld_link_map main_binary_map, ld_so_map;
+ struct wine_preload_info **wine_main_preload_info;
+
+ argv = (char **)&argc + 1;
+
+ /* skip over the parameters */
+ p = argv + argc + 1;
+
+ /* skip over the environment */
+ while (*p) p++;
+
+ av = (ElfW(auxv_t)*) (p+1);
+ if (!get_auxiliary( av, AT_PAGESZ, &page_size )) page_size = 4096;
+ page_mask = page_size - 1;
+
+#ifdef DUMP_AUX_INFO
+ for( i = 0; i<argc; i++ ) wld_printf("argv[%x] = %s\n", i, argv[i]);
+ dump_auxiliary( av );
+#endif
+
+ /* reserve memory that Wine needs */
+ for (i = 0; preload_info[i].size; i++)
+ mmap( preload_info[i].addr, preload_info[i].size,
+ PROT_NONE, MAP_FIXED | MAP_PRIVATE | MAP_ANON | MAP_NORESERVE, -1, 0 );
+
+ /* load the main binary */
+ map_so_lib( argv[0], &main_binary_map );
+
+ /* load the ELF interpreter */
+ interp = (char *)main_binary_map.l_addr + main_binary_map.l_interp;
+ map_so_lib( interp, &ld_so_map );
+
+ /* store pointer to the preload info into the appropriate main binary variable */
+ wine_main_preload_info = find_symbol( main_binary_map.l_phdr, main_binary_map.l_phnum,
+ "wine_main_preload_info" );
+ if (wine_main_preload_info) *wine_main_preload_info = preload_info;
+ else wld_printf( "wine_main_preload_info not found\n" );
+
+ set_auxiliary( av, AT_PHDR, (unsigned long)main_binary_map.l_phdr );
+ set_auxiliary( av, AT_PHNUM, main_binary_map.l_phnum );
+ set_auxiliary( av, AT_BASE, ld_so_map.l_addr );
+ set_auxiliary( av, AT_ENTRY, main_binary_map.l_entry );
+
+#ifdef DUMP_AUX_INFO
+ wld_printf("New auxiliary info:\n");
+ dump_auxiliary( av );
+ wld_printf("jumping to %x\n", ld_so_map.l_entry);
+#endif
+
+ return (void *)ld_so_map.l_entry;
+}
