1 /****************************************************************************/
3 * QEMU bFLT binary loader. Based on linux/fs/binfmt_flat.c
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, see <http://www.gnu.org/licenses/>.
18 * Copyright (C) 2006 CodeSourcery.
19 * Copyright (C) 2000-2003 David McCullough <davidm@snapgear.com>
20 * Copyright (C) 2002 Greg Ungerer <gerg@snapgear.com>
21 * Copyright (C) 2002 SnapGear, by Paul Dale <pauli@snapgear.com>
22 * Copyright (C) 2000, 2001 Lineo, by David McCullough <davidm@lineo.com>
25 * linux/fs/binfmt_aout.c:
26 * Copyright (C) 1991, 1992, 1996 Linus Torvalds
27 * linux/fs/binfmt_flat.c for 2.0 kernel
28 * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com>
29 * JAN/99 -- coded full program relocation (gerg@snapgear.com)
32 /* ??? ZFLAT and shared library support is currently disabled. */
34 /****************************************************************************/
36 #include "qemu/osdep.h"
39 #include "user-internals.h"
41 #include "user-mmap.h"
43 #include "target_flat.h"
48 #define DBG_FLT(...) printf(__VA_ARGS__)
53 #define RELOC_FAILED 0xff00ff01 /* Relocation incorrect somewhere */
54 #define UNLOADED_LIB 0x7ff000ff /* Placeholder for unused library */
57 abi_ulong start_code
; /* Start of text segment */
58 abi_ulong start_data
; /* Start of data segment */
59 abi_ulong end_data
; /* Start of bss section */
60 abi_ulong start_brk
; /* End of data segment */
61 abi_ulong text_len
; /* Length of text segment */
62 abi_ulong entry
; /* Start address for this module */
63 abi_ulong build_date
; /* When this one was compiled */
64 short loaded
; /* Has this library been loaded? */
67 #ifdef CONFIG_BINFMT_SHARED_FLAT
68 static int load_flat_shared_library(int id
, struct lib_info
*p
);
73 /****************************************************************************/
75 * create_flat_tables() parses the env- and arg-strings in new user
76 * memory and creates the pointer tables from them, and puts their
77 * addresses on the "stack", returning the new stack pointer value.
80 /* Push a block of strings onto the guest stack. */
81 static abi_ulong
copy_strings(abi_ulong p
, int n
, char **s
)
86 len
= strlen(s
[n
]) + 1;
88 memcpy_to_target(p
, s
[n
], len
);
94 static int target_pread(int fd
, abi_ulong ptr
, abi_ulong len
,
100 buf
= lock_user(VERIFY_WRITE
, ptr
, len
, 0);
104 ret
= pread(fd
, buf
, len
, offset
);
108 unlock_user(buf
, ptr
, len
);
111 /****************************************************************************/
113 #ifdef CONFIG_BINFMT_ZFLAT
115 #include <linux/zlib.h>
117 #define LBUFSIZE 4000
120 #define ASCII_FLAG 0x01 /* bit 0 set: file probably ASCII text */
121 #define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */
122 #define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
123 #define ORIG_NAME 0x08 /* bit 3 set: original file name present */
124 #define COMMENT 0x10 /* bit 4 set: file comment present */
125 #define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */
126 #define RESERVED 0xC0 /* bit 6,7: reserved */
128 static int decompress_exec(
129 struct linux_binprm
*bprm
,
130 unsigned long offset
,
140 DBG_FLT("decompress_exec(offset=%x,buf=%x,len=%x)\n",(int)offset
, (int)dst
, (int)len
);
142 memset(&strm
, 0, sizeof(strm
));
143 strm
.workspace
= kmalloc(zlib_inflate_workspacesize(), GFP_KERNEL
);
144 if (strm
.workspace
== NULL
) {
145 DBG_FLT("binfmt_flat: no memory for decompress workspace\n");
148 buf
= kmalloc(LBUFSIZE
, GFP_KERNEL
);
150 DBG_FLT("binfmt_flat: no memory for read buffer\n");
155 /* Read in first chunk of data and parse gzip header. */
157 ret
= bprm
->file
->f_op
->read(bprm
->file
, buf
, LBUFSIZE
, &fpos
);
165 /* Check minimum size -- gzip header */
167 DBG_FLT("binfmt_flat: file too small?\n");
171 /* Check gzip magic number */
172 if ((buf
[0] != 037) || ((buf
[1] != 0213) && (buf
[1] != 0236))) {
173 DBG_FLT("binfmt_flat: unknown compression magic?\n");
177 /* Check gzip method */
179 DBG_FLT("binfmt_flat: unknown compression method?\n");
182 /* Check gzip flags */
183 if ((buf
[3] & ENCRYPTED
) || (buf
[3] & CONTINUATION
) ||
184 (buf
[3] & RESERVED
)) {
185 DBG_FLT("binfmt_flat: unknown flags?\n");
190 if (buf
[3] & EXTRA_FIELD
) {
191 ret
+= 2 + buf
[10] + (buf
[11] << 8);
192 if (unlikely(LBUFSIZE
== ret
)) {
193 DBG_FLT("binfmt_flat: buffer overflow (EXTRA)?\n");
197 if (buf
[3] & ORIG_NAME
) {
198 for (; ret
< LBUFSIZE
&& (buf
[ret
] != 0); ret
++)
200 if (unlikely(LBUFSIZE
== ret
)) {
201 DBG_FLT("binfmt_flat: buffer overflow (ORIG_NAME)?\n");
205 if (buf
[3] & COMMENT
) {
206 for (; ret
< LBUFSIZE
&& (buf
[ret
] != 0); ret
++)
208 if (unlikely(LBUFSIZE
== ret
)) {
209 DBG_FLT("binfmt_flat: buffer overflow (COMMENT)?\n");
215 strm
.avail_in
-= ret
;
218 strm
.avail_out
= len
;
221 if (zlib_inflateInit2(&strm
, -MAX_WBITS
) != Z_OK
) {
222 DBG_FLT("binfmt_flat: zlib init failed?\n");
226 while ((ret
= zlib_inflate(&strm
, Z_NO_FLUSH
)) == Z_OK
) {
227 ret
= bprm
->file
->f_op
->read(bprm
->file
, buf
, LBUFSIZE
, &fpos
);
241 DBG_FLT("binfmt_flat: decompression failed (%d), %s\n",
248 zlib_inflateEnd(&strm
);
252 kfree(strm
.workspace
);
257 #endif /* CONFIG_BINFMT_ZFLAT */
259 /****************************************************************************/
262 calc_reloc(abi_ulong r
, struct lib_info
*p
, int curid
, int internalp
)
267 abi_ulong start_data
;
269 abi_ulong start_code
;
271 #ifdef CONFIG_BINFMT_SHARED_FLAT
272 #error needs checking
274 id
= curid
; /* Relocs of 0 are always self referring */
276 id
= (r
>> 24) & 0xff; /* Find ID for this reloc */
277 r
&= 0x00ffffff; /* Trim ID off here */
279 if (id
>= MAX_SHARED_LIBS
) {
280 fprintf(stderr
, "BINFMT_FLAT: reference 0x%x to shared library %d\n",
286 fprintf(stderr
, "BINFMT_FLAT: reloc address 0x%x not "
287 "in same module (%d != %d)\n",
288 (unsigned) r
, curid
, id
);
290 } else if (!p
[id
].loaded
&& is_error(load_flat_shared_library(id
, p
))) {
291 fprintf(stderr
, "BINFMT_FLAT: failed to load library %d\n", id
);
294 /* Check versioning information (i.e. time stamps) */
295 if (p
[id
].build_date
&& p
[curid
].build_date
296 && p
[curid
].build_date
< p
[id
].build_date
) {
297 fprintf(stderr
, "BINFMT_FLAT: library %d is younger than %d\n",
306 start_brk
= p
[id
].start_brk
;
307 start_data
= p
[id
].start_data
;
308 start_code
= p
[id
].start_code
;
309 text_len
= p
[id
].text_len
;
311 if (!flat_reloc_valid(r
, start_brk
- start_data
+ text_len
)) {
312 fprintf(stderr
, "BINFMT_FLAT: reloc outside program 0x%x "
314 (int) r
,(int)(start_brk
-start_code
),(int)text_len
);
318 if (r
< text_len
) /* In text segment */
319 addr
= r
+ start_code
;
320 else /* In data segment */
321 addr
= r
- text_len
+ start_data
;
323 /* Range checked already above so doing the range tests is redundant...*/
331 /****************************************************************************/
333 /* ??? This does not handle endianness correctly. */
334 static void old_reloc(struct lib_info
*libinfo
, uint32_t rl
)
337 const char *segment
[] = { "TEXT", "DATA", "BSS", "*UNKNOWN*" };
343 offset
= rl
& 0x3fffffff;
344 reloc_type
= rl
>> 30;
345 /* ??? How to handle this? */
346 #if defined(CONFIG_COLDFIRE)
347 ptr
= (uint32_t *) ((unsigned long) libinfo
->start_code
+ offset
);
349 ptr
= (uint32_t *) ((unsigned long) libinfo
->start_data
+ offset
);
353 fprintf(stderr
, "Relocation of variable at DATASEG+%x "
354 "(address %p, currently %x) into segment %s\n",
355 offset
, ptr
, (int)*ptr
, segment
[reloc_type
]);
358 switch (reloc_type
) {
359 case OLD_FLAT_RELOC_TYPE_TEXT
:
360 *ptr
+= libinfo
->start_code
;
362 case OLD_FLAT_RELOC_TYPE_DATA
:
363 *ptr
+= libinfo
->start_data
;
365 case OLD_FLAT_RELOC_TYPE_BSS
:
366 *ptr
+= libinfo
->end_data
;
369 fprintf(stderr
, "BINFMT_FLAT: Unknown relocation type=%x\n",
373 DBG_FLT("Relocation became %x\n", (int)*ptr
);
376 /****************************************************************************/
378 static int load_flat_file(struct linux_binprm
* bprm
,
379 struct lib_info
*libinfo
, int id
, abi_ulong
*extra_stack
)
381 struct flat_hdr
* hdr
;
382 abi_ulong textpos
= 0, datapos
= 0;
384 abi_ulong realdatastart
= 0;
385 abi_ulong text_len
, data_len
, bss_len
, stack_len
, flags
;
387 abi_ulong reloc
= 0, rp
;
388 int i
, rev
, relocs
= 0;
390 abi_ulong start_code
;
393 hdr
= ((struct flat_hdr
*) bprm
->buf
); /* exec-header */
395 text_len
= ntohl(hdr
->data_start
);
396 data_len
= ntohl(hdr
->data_end
) - ntohl(hdr
->data_start
);
397 bss_len
= ntohl(hdr
->bss_end
) - ntohl(hdr
->data_end
);
398 stack_len
= ntohl(hdr
->stack_size
);
400 stack_len
+= *extra_stack
;
401 *extra_stack
= stack_len
;
403 relocs
= ntohl(hdr
->reloc_count
);
404 flags
= ntohl(hdr
->flags
);
405 rev
= ntohl(hdr
->rev
);
407 DBG_FLT("BINFMT_FLAT: Loading file: %s\n", bprm
->filename
);
409 if (rev
!= FLAT_VERSION
&& rev
!= OLD_FLAT_VERSION
) {
410 fprintf(stderr
, "BINFMT_FLAT: bad magic/rev (0x%x, need 0x%x)\n",
411 rev
, (int) FLAT_VERSION
);
415 /* Don't allow old format executables to use shared libraries */
416 if (rev
== OLD_FLAT_VERSION
&& id
!= 0) {
417 fprintf(stderr
, "BINFMT_FLAT: shared libraries are not available\n");
422 * fix up the flags for the older format, there were all kinds
423 * of endian hacks, this only works for the simple cases
425 if (rev
== OLD_FLAT_VERSION
&& flat_old_ram_flag(flags
))
426 flags
= FLAT_FLAG_RAM
;
428 #ifndef CONFIG_BINFMT_ZFLAT
429 if (flags
& (FLAT_FLAG_GZIP
|FLAT_FLAG_GZDATA
)) {
430 fprintf(stderr
, "Support for ZFLAT executables is not enabled\n");
436 * calculate the extra space we need to map in
438 extra
= relocs
* sizeof(abi_ulong
);
439 if (extra
< bss_len
+ stack_len
)
440 extra
= bss_len
+ stack_len
;
442 /* Add space for library base pointers. Make sure this does not
443 misalign the doesn't misalign the data segment. */
444 indx_len
= MAX_SHARED_LIBS
* sizeof(abi_ulong
);
445 indx_len
= (indx_len
+ 15) & ~(abi_ulong
)15;
448 * Allocate the address space.
450 probe_guest_base(bprm
->filename
, 0,
451 text_len
+ data_len
+ extra
+ indx_len
- 1);
454 * there are a couple of cases here, the separate code/data
455 * case, and then the fully copied to RAM case which lumps
458 if ((flags
& (FLAT_FLAG_RAM
|FLAT_FLAG_GZIP
)) == 0) {
460 * this should give us a ROM ptr, but if it doesn't we don't
463 DBG_FLT("BINFMT_FLAT: ROM mapping of file (we hope)\n");
465 textpos
= target_mmap(0, text_len
, PROT_READ
|PROT_EXEC
,
466 MAP_PRIVATE
, bprm
->fd
, 0);
468 fprintf(stderr
, "Unable to mmap process text\n");
472 realdatastart
= target_mmap(0, data_len
+ extra
+ indx_len
,
473 PROT_READ
|PROT_WRITE
|PROT_EXEC
,
474 MAP_PRIVATE
| MAP_ANONYMOUS
, -1, 0);
476 if (realdatastart
== -1) {
477 fprintf(stderr
, "Unable to allocate RAM for process data\n");
478 return realdatastart
;
480 datapos
= realdatastart
+ indx_len
;
482 DBG_FLT("BINFMT_FLAT: Allocated data+bss+stack (%d bytes): %x\n",
483 (int)(data_len
+ bss_len
+ stack_len
), (int)datapos
);
485 fpos
= ntohl(hdr
->data_start
);
486 #ifdef CONFIG_BINFMT_ZFLAT
487 if (flags
& FLAT_FLAG_GZDATA
) {
488 result
= decompress_exec(bprm
, fpos
, (char *) datapos
,
489 data_len
+ (relocs
* sizeof(abi_ulong
)))
493 result
= target_pread(bprm
->fd
, datapos
,
494 data_len
+ (relocs
* sizeof(abi_ulong
)),
498 fprintf(stderr
, "Unable to read data+bss\n");
502 reloc
= datapos
+ (ntohl(hdr
->reloc_start
) - text_len
);
506 textpos
= target_mmap(0, text_len
+ data_len
+ extra
+ indx_len
,
507 PROT_READ
| PROT_EXEC
| PROT_WRITE
,
508 MAP_PRIVATE
| MAP_ANONYMOUS
, -1, 0);
509 if (textpos
== -1 ) {
510 fprintf(stderr
, "Unable to allocate RAM for process text/data\n");
514 realdatastart
= textpos
+ ntohl(hdr
->data_start
);
515 datapos
= realdatastart
+ indx_len
;
516 reloc
= (textpos
+ ntohl(hdr
->reloc_start
) + indx_len
);
518 #ifdef CONFIG_BINFMT_ZFLAT
519 #error code needs checking
521 * load it all in and treat it like a RAM load from now on
523 if (flags
& FLAT_FLAG_GZIP
) {
524 result
= decompress_exec(bprm
, sizeof (struct flat_hdr
),
525 (((char *) textpos
) + sizeof (struct flat_hdr
)),
526 (text_len
+ data_len
+ (relocs
* sizeof(unsigned long))
527 - sizeof (struct flat_hdr
)),
529 memmove((void *) datapos
, (void *) realdatastart
,
530 data_len
+ (relocs
* sizeof(unsigned long)));
531 } else if (flags
& FLAT_FLAG_GZDATA
) {
533 result
= bprm
->file
->f_op
->read(bprm
->file
,
534 (char *) textpos
, text_len
, &fpos
);
535 if (!is_error(result
)) {
536 result
= decompress_exec(bprm
, text_len
, (char *) datapos
,
537 data_len
+ (relocs
* sizeof(unsigned long)), 0);
543 result
= target_pread(bprm
->fd
, textpos
,
546 result
= target_pread(bprm
->fd
, datapos
,
547 data_len
+ (relocs
* sizeof(abi_ulong
)),
548 ntohl(hdr
->data_start
));
552 fprintf(stderr
, "Unable to read code+data+bss\n");
557 DBG_FLT("Mapping is 0x%x, Entry point is 0x%x, data_start is 0x%x\n",
558 (int)textpos
, 0x00ffffff&ntohl(hdr
->entry
),
559 ntohl(hdr
->data_start
));
561 /* The main program needs a little extra setup in the task structure */
562 start_code
= textpos
+ sizeof (struct flat_hdr
);
564 DBG_FLT("%s %s: TEXT=%x-%x DATA=%x-%x BSS=%x-%x\n",
565 id
? "Lib" : "Load", bprm
->filename
,
566 (int) start_code
, (int) (textpos
+ text_len
),
568 (int) (datapos
+ data_len
),
569 (int) (datapos
+ data_len
),
570 (int) (((datapos
+ data_len
+ bss_len
) + 3) & ~3));
572 text_len
-= sizeof(struct flat_hdr
); /* the real code len */
574 /* Store the current module values into the global library structure */
575 libinfo
[id
].start_code
= start_code
;
576 libinfo
[id
].start_data
= datapos
;
577 libinfo
[id
].end_data
= datapos
+ data_len
;
578 libinfo
[id
].start_brk
= datapos
+ data_len
+ bss_len
;
579 libinfo
[id
].text_len
= text_len
;
580 libinfo
[id
].loaded
= 1;
581 libinfo
[id
].entry
= (0x00ffffff & ntohl(hdr
->entry
)) + textpos
;
582 libinfo
[id
].build_date
= ntohl(hdr
->build_date
);
585 * We just load the allocations into some temporary memory to
586 * help simplify all this mumbo jumbo
588 * We've got two different sections of relocation entries.
589 * The first is the GOT which resides at the beginning of the data segment
590 * and is terminated with a -1. This one can be relocated in place.
591 * The second is the extra relocation entries tacked after the image's
592 * data segment. These require a little more processing as the entry is
593 * really an offset into the image which contains an offset into the
596 if (flags
& FLAT_FLAG_GOTPIC
) {
600 if (get_user_ual(addr
, rp
))
605 addr
= calc_reloc(addr
, libinfo
, id
, 0);
606 if (addr
== RELOC_FAILED
)
608 if (put_user_ual(addr
, rp
))
611 rp
+= sizeof(abi_ulong
);
616 * Now run through the relocation entries.
617 * We've got to be careful here as C++ produces relocatable zero
618 * entries in the constructor and destructor tables which are then
619 * tested for being not zero (which will always occur unless we're
620 * based from address zero). This causes an endless loop as __start
621 * is at zero. The solution used is to not relocate zero addresses.
622 * This has the negative side effect of not allowing a global data
623 * reference to be statically initialised to _stext (I've moved
624 * __start to address 4 so that is okay).
626 if (rev
> OLD_FLAT_VERSION
) {
627 abi_ulong persistent
= 0;
628 for (i
= 0; i
< relocs
; i
++) {
629 abi_ulong addr
, relval
;
631 /* Get the address of the pointer to be
632 relocated (of course, the address has to be
634 if (get_user_ual(relval
, reloc
+ i
* sizeof(abi_ulong
)))
636 relval
= ntohl(relval
);
637 if (flat_set_persistent(relval
, &persistent
))
639 addr
= flat_get_relocate_addr(relval
);
640 rp
= calc_reloc(addr
, libinfo
, id
, 1);
641 if (rp
== RELOC_FAILED
)
644 /* Get the pointer's value. */
645 if (get_user_ual(addr
, rp
))
647 addr
= flat_get_addr_from_rp(addr
, relval
, flags
, &persistent
);
650 * Do the relocation. PIC relocs in the data section are
651 * already in target order
653 if ((flags
& FLAT_FLAG_GOTPIC
) == 0)
655 addr
= calc_reloc(addr
, libinfo
, id
, 0);
656 if (addr
== RELOC_FAILED
)
659 /* Write back the relocated pointer. */
660 if (flat_put_addr_at_rp(rp
, addr
, relval
))
665 for (i
= 0; i
< relocs
; i
++) {
667 if (get_user_ual(relval
, reloc
+ i
* sizeof(abi_ulong
)))
669 old_reloc(&libinfo
[0], relval
);
674 memset(g2h_untagged(datapos
+ data_len
), 0, bss_len
);
680 /****************************************************************************/
681 #ifdef CONFIG_BINFMT_SHARED_FLAT
684 * Load a shared library into memory. The library gets its own data
685 * segment (including bss) but not argv/argc/environ.
688 static int load_flat_shared_library(int id
, struct lib_info
*libs
)
690 struct linux_binprm bprm
;
694 /* Create the file name */
695 sprintf(buf
, "/lib/lib%d.so", id
);
697 /* Open the file up */
699 bprm
.file
= open_exec(bprm
.filename
);
700 res
= PTR_ERR(bprm
.file
);
701 if (IS_ERR(bprm
.file
))
704 res
= prepare_binprm(&bprm
);
706 if (!is_error(res
)) {
707 res
= load_flat_file(&bprm
, libs
, id
, NULL
);
710 allow_write_access(bprm
.file
);
717 #endif /* CONFIG_BINFMT_SHARED_FLAT */
719 int load_flt_binary(struct linux_binprm
*bprm
, struct image_info
*info
)
721 struct lib_info libinfo
[MAX_SHARED_LIBS
];
724 abi_ulong start_addr
;
729 memset(libinfo
, 0, sizeof(libinfo
));
731 * We have to add the size of our arguments to our stack size
732 * otherwise it's too easy for users to create stack overflows
733 * by passing in a huge argument list. And yes, we have to be
734 * pedantic and include space for the argv/envp array as it may have
738 for (i
= 0; i
< bprm
->argc
; ++i
) {
739 /* the argv strings */
740 stack_len
+= strlen(bprm
->argv
[i
]);
742 for (i
= 0; i
< bprm
->envc
; ++i
) {
743 /* the envp strings */
744 stack_len
+= strlen(bprm
->envp
[i
]);
746 stack_len
+= (bprm
->argc
+ 1) * 4; /* the argv array */
747 stack_len
+= (bprm
->envc
+ 1) * 4; /* the envp array */
750 res
= load_flat_file(bprm
, libinfo
, 0, &stack_len
);
755 /* Update data segment pointers for all libraries */
756 for (i
=0; i
<MAX_SHARED_LIBS
; i
++) {
757 if (libinfo
[i
].loaded
) {
759 p
= libinfo
[i
].start_data
;
760 for (j
=0; j
<MAX_SHARED_LIBS
; j
++) {
762 /* FIXME - handle put_user() failures */
763 if (put_user_ual(libinfo
[j
].loaded
764 ? libinfo
[j
].start_data
772 p
= ((libinfo
[0].start_brk
+ stack_len
+ 3) & ~3) - 4;
773 DBG_FLT("p=%x\n", (int)p
);
775 /* Copy argv/envp. */
776 p
= copy_strings(p
, bprm
->envc
, bprm
->envp
);
777 p
= copy_strings(p
, bprm
->argc
, bprm
->argv
);
779 sp
= p
& ~(abi_ulong
)(sizeof(abi_ulong
) - 1);
780 /* Enforce final stack alignment of 16 bytes. This is sufficient
781 for all current targets, and excess alignment is harmless. */
782 stack_len
= bprm
->envc
+ bprm
->argc
+ 2;
783 stack_len
+= flat_argvp_envp_on_stack() ? 2 : 0; /* arvg, argp */
784 stack_len
+= 1; /* argc */
785 stack_len
*= sizeof(abi_ulong
);
786 sp
-= (sp
- stack_len
) & 15;
787 sp
= loader_build_argptr(bprm
->envc
, bprm
->argc
, sp
, p
,
788 flat_argvp_envp_on_stack());
790 /* Fake some return addresses to ensure the call chain will
791 * initialise library in order for us. We are required to call
792 * lib 1 first, then 2, ... and finally the main program (id 0).
794 start_addr
= libinfo
[0].entry
;
796 #ifdef CONFIG_BINFMT_SHARED_FLAT
798 for (i
= MAX_SHARED_LIBS
-1; i
>0; i
--) {
799 if (libinfo
[i
].loaded
) {
800 /* Push previous first to call address */
802 if (put_user_ual(start_addr
, sp
))
804 start_addr
= libinfo
[i
].entry
;
809 /* Stash our initial stack pointer into the mm structure */
810 info
->start_code
= libinfo
[0].start_code
;
811 info
->end_code
= libinfo
[0].start_code
+ libinfo
[0].text_len
;
812 info
->start_data
= libinfo
[0].start_data
;
813 info
->end_data
= libinfo
[0].end_data
;
814 info
->brk
= libinfo
[0].start_brk
;
815 info
->start_stack
= sp
;
816 info
->stack_limit
= libinfo
[0].start_brk
;
817 info
->entry
= start_addr
;
818 info
->code_offset
= info
->start_code
;
819 info
->data_offset
= info
->start_data
- libinfo
[0].text_len
;
821 DBG_FLT("start_thread(entry=0x%x, start_stack=0x%x)\n",
822 (int)info
->entry
, (int)info
->start_stack
);