sparc: fix tftpboot.img for sparc64 on little-endian host

piggyback_32 adapted to support sparc64: - locating "HdrS" differs for sparc and sparc64 - sparc64 updates a_text, a_data + a_bss in the final a.out header Updated Makefile to use piggyback_32 for sparc64. Deleted the now unused piggyback_64.c piggyback_32.c is host endian neutral and works on both little-endian and big-endian hosts. This fixes a long standing bug where sparc64 could not generate tftpboot.img on a x86 host. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>

sparc: fix tftpboot.img for sparc64 on little-endian host
piggyback_32 adapted to support sparc64: - locating "HdrS" differs for sparc and sparc64 - sparc64 updates a_text, a_data + a_bss in the final a.out header Updated Makefile to use piggyback_32 for sparc64. Deleted the now unused piggyback_64.c piggyback_32.c is host endian neutral and works on both little-endian and big-endian hosts. This fixes a long standing bug where sparc64 could not generate tftpboot.img on a x86 host. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Sam Ravnborg · David S. Miller
1 parent a020bb17b7
Showing 3 changed files with 80 additions and 133 deletions Side-by-side Diff
arch/sparc/boot/Makefile
arch/sparc/boot/piggyback_32.c
arch/sparc/boot/piggyback_64.c
@@ -6,7 +6,7 @@
 ROOT_IMG	:= /usr/src/root.img
 ELFTOAOUT	:= elftoaout
  
-hostprogs-y	:= piggyback_32 piggyback_64 btfixupprep
+hostprogs-y	:= piggyback_32 btfixupprep
 targets		:= tftpboot.img btfix.o btfix.S image zImage vmlinux.aout
 clean-files	:= System.map
  
@@ -69,7 +69,7 @@
  
 ifeq ($(CONFIG_SPARC64),y)
 quiet_cmd_piggy     = PIGGY   $@
-      cmd_piggy     = $(obj)/piggyback_64 $@ System.map $(ROOT_IMG)
+      cmd_piggy     = $(obj)/piggyback_32 $(BITS) $@ System.map $(ROOT_IMG)
 quiet_cmd_strip     = STRIP   $@
       cmd_strip     = $(STRIP) -R .comment -R .note -K sun4u_init -K _end -K _start vmlinux -o $@
  
@@ -82,7 +82,7 @@
 $(obj)/zImage: $(obj)/image
 	$(call if_changed,gzip)
  
-$(obj)/tftpboot.img: $(obj)/image $(obj)/piggyback_64 System.map $(ROOT_IMG) FORCE
+$(obj)/tftpboot.img: $(obj)/image $(obj)/piggyback_32 System.map $(ROOT_IMG) FORCE
 	$(call if_changed,elftoaout)
 	$(call if_changed,piggy)
 	@echo '  kernel: $@ is ready'
@@ -107,7 +107,8 @@
  *
  * Return 0 if either start or end is not found
  */
-static int get_start_end(const char *filename, unsigned int *start, unsigned int *end)
+static int get_start_end(const char *filename, unsigned int *start,
+                                               unsigned int *end)
 {
 	FILE *map;
 	char buffer[1024];
  
@@ -131,11 +132,60 @@
 	return 1;
 }
  
+#define LOOKBACK (128 * 4)
+#define BUFSIZE 1024
+/*
+ * Find the HdrS entry from head_32/head_64.
+ * We check if it is at the beginning of the file (sparc64 case)
+ * and if not we search for it.
+ * When we search do so in steps of 4 as HdrS is on a 4-byte aligned
+ * address (it is on same alignment as sparc instructions)
+ * Return the offset to the HdrS entry (as off_t)
+ */
+static off_t get_hdrs_offset(int kernelfd, const char *filename)
+{
+	char buffer[BUFSIZE];
+	off_t offset;
+	int i;
+
+	if (lseek(kernelfd, 0, SEEK_SET) < 0)
+		die("lseek");
+	if (read(kernelfd, buffer, BUFSIZE) != BUFSIZE)
+		die(filename);
+
+	if (buffer[40] == 'H' && buffer[41] == 'd' &&
+	    buffer[42] == 'r' && buffer[43] == 'S') {
+		return 40;
+	} else {
+		/*  Find the gokernel label */
+		/* Decode offset from branch instruction */
+		offset = ld2(buffer + AOUT_TEXT_OFFSET + 2) << 2;
+		/* Go back 512 bytes so we do not miss HdrS */
+		offset -= LOOKBACK;
+		/* skip a.out header */
+		offset += AOUT_TEXT_OFFSET;
+		if (lseek(kernelfd, offset, SEEK_SET) < 0)
+			die("lseek");
+		if (read(kernelfd, buffer, BUFSIZE) != BUFSIZE)
+			die(filename);
+
+		for (i = 0; i < LOOKBACK; i += 4) {
+			if (buffer[i + 0] == 'H' && buffer[i + 1] == 'd' &&
+			    buffer[i + 2] == 'r' && buffer[i + 3] == 'S') {
+				return offset + i;
+			}
+		}
+	}
+	fprintf (stderr, "Couldn't find headers signature in %s\n", filename);
+	exit(1);
+}
+
 int main(int argc,char **argv)
 {
 	static char aout_magic[] = { 0x01, 0x03, 0x01, 0x07 };
-	char buffer[1024], *q, *r;
-	unsigned int i, start, end, offset;
+	char buffer[1024];
+	unsigned int i, start, end;
+	off_t offset;
 	struct stat s;
 	int image, tail;
  
@@ -147,7 +197,8 @@
 		die(argv[4]);
  
 	if (!get_start_end(argv[3], &start, &end)) {
-		fprintf (stderr, "Could not determine start and end from %s\n", argv[3]);
+		fprintf(stderr, "Could not determine start and end from %s\n",
+		        argv[3]);
 		exit(1);
 	}
 	if ((image = open(argv[2], O_RDWR)) < 0)
  
@@ -159,27 +210,17 @@
 		exit(1);
 	}
 	/*
-	 * We need to fill in values for sparc_ramdisk_image + sparc_ramdisk_size
+	 * We need to fill in values for
+	 * sparc_ramdisk_image + sparc_ramdisk_size
 	 * To locate these symbols search for the "HdrS" text which appear
 	 * in the image a little before the gokernel symbol.
 	 * See definition of these in init_32.S
 	 */
  
-	/*  Find the gokernel label */
-	i = AOUT_TEXT_OFFSET + (ld2(buffer + AOUT_TEXT_OFFSET + 2) << 2) - 512;
-	if (lseek(image, i, 0) < 0)
-		die("lseek");
-	if (read(image, buffer, 1024) != 1024)
-		die(argv[2]);
-	for (q = buffer, r = q + 512; q < r; q += 4) {
-		if (*q == 'H' && q[1] == 'd' && q[2] == 'r' && q[3] == 'S')
-			break;
-	}
-	if (q == r) {
-		fprintf (stderr, "Couldn't find headers signature in the kernel.\n");
-		exit(1);
-	}
-	offset = i + (q - buffer) + 10;
+	offset = get_hdrs_offset(image, argv[2]);
+	/* skip HdrS + LINUX_VERSION_CODE + HdrS version */
+	offset += 10;
+
 	if (lseek(image, offset, 0) < 0)
 		die("lseek");
  
@@ -197,6 +238,22 @@
  
 	if (write(image, buffer + 2, 14) != 14)
 		die(argv[2]);
+
+	/* For sparc64 update a_text and clear a_data + a_bss */
+	if (is64bit)
+	{
+		if (lseek(image, 4, 0) < 0)
+			die("lseek");
+		/* a_text */
+		st4(buffer, align(end + 32 + 8191) - (start & ~0x3fffffUL) +
+		            s.st_size);
+		/* a_data */
+		st4(buffer + 4, 0);
+		/* a_bss */
+		st4(buffer + 8, 0);
+		if (write(image, buffer, 12) != 12)
+			die(argv[2]);
+	}
  
 	/* seek page aligned boundary in the image file and add boot image */
 	if (lseek(image, AOUT_TEXT_OFFSET - start + align(end + 32), 0) < 0)
-/*
-   Simple utility to make a single-image install kernel with initial ramdisk
-   for Sparc64 tftpbooting without need to set up nfs.
-   
-   Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
-   
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2 of the License, or
-   (at your option) any later version.
-   
-   This program 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 General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
-   
-#include <stdio.h>
-#include <string.h>
-#include <ctype.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <dirent.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-
-/* Note: run this on an a.out kernel (use elftoaout for it), as PROM looks for a.out image onlly
-   usage: piggyback vmlinux System.map tail, where tail is gzipped fs of the initial ramdisk */
-
-static void die(char *str)
-{
-	perror (str);
-	exit(1);
-}
-
-int main(int argc,char **argv)
-{
-	char buffer [1024], *q, *r;
-	unsigned int i, j, k, start, end, offset;
-	FILE *map;
-	struct stat s;
-	int image, tail;
-	
-	start = end = 0;
-	if (stat (argv[3], &s) < 0) die (argv[3]);
-	map = fopen (argv[2], "r");
-	if (!map) die(argv[2]);
-	while (fgets (buffer, 1024, map)) {
-		if (!strcmp (buffer + 19, "_start\n"))
-		start = strtoul (buffer + 8, NULL, 16);
-		else if (!strcmp (buffer + 19, "_end\n"))
-		end = strtoul (buffer + 8, NULL, 16);
-	}
-	fclose (map);
-	if ((image = open(argv[1],O_RDWR)) < 0) die(argv[1]);
-	if (read(image,buffer,512) != 512) die(argv[1]);
-	if (!memcmp (buffer, "\177ELF", 4)) {
-		unsigned int *p = (unsigned int *)(buffer + *(unsigned int *)(buffer + 28));
-		
-		i = p[1] + *(unsigned int *)(buffer + 24) - p[2];
-		if (lseek(image,i,0) < 0) die("lseek");
-		if (read(image,buffer,512) != 512) die(argv[1]);
-		j = 0;
-	} else if (*(unsigned int *)buffer == 0x01030107) {
-		i = j = 32;
-	} else {
-		fprintf (stderr, "Not ELF nor a.out. Don't blame me.\n");
-		exit(1);
-	}
-	k = i;
-	if (j == 32 && buffer[40] == 'H' && buffer[41] == 'd' && buffer[42] == 'r' && buffer[43] == 'S') {
-		offset = 40 + 10;
-	} else {
-		i += ((*(unsigned short *)(buffer + j + 2))<<2) - 512;
-		if (lseek(image,i,0) < 0) die("lseek");
-		if (read(image,buffer,1024) != 1024) die(argv[1]);
-		for (q = buffer, r = q + 512; q < r; q += 4) {
-			if (*q == 'H' && q[1] == 'd' && q[2] == 'r' && q[3] == 'S')
-				break;
-		}
-		if (q == r) {
-			fprintf (stderr, "Couldn't find headers signature in the kernel.\n");
-			exit(1);
-		}
-		offset = i + (q - buffer) + 10;
-	}
-	if (lseek(image, offset, 0) < 0) die ("lseek");
-	*(unsigned *)buffer = 0;
-	*(unsigned *)(buffer + 4) = 0x01000000;
-	*(unsigned *)(buffer + 8) = ((end + 32 + 8191) & ~8191);
-	*(unsigned *)(buffer + 12) = s.st_size;
-	if (write(image,buffer+2,14) != 14) die (argv[1]);
-	if (lseek(image, 4, 0) < 0) die ("lseek");
-	*(unsigned *)buffer = ((end + 32 + 8191) & ~8191) - (start & ~0x3fffffUL) + s.st_size;
-	*(unsigned *)(buffer + 4) = 0;
-	*(unsigned *)(buffer + 8) = 0;
-	if (write(image,buffer,12) != 12) die (argv[1]);
-	if (lseek(image, k - start + ((end + 32 + 8191) & ~8191), 0) < 0) die ("lseek");
-	if ((tail = open(argv[3],O_RDONLY)) < 0) die(argv[3]);
-	while ((i = read (tail,buffer,1024)) > 0)
-		if (write(image,buffer,i) != i) die (argv[1]);
-	if (close(image) < 0) die("close");
-	if (close(tail) < 0) die("close");
-    	return 0;
-}
...	...	@@ -6,7 +6,7 @@
6	6	ROOT_IMG := /usr/src/root.img
7	7	ELFTOAOUT := elftoaout
8	8
9		-hostprogs-y := piggyback_32 piggyback_64 btfixupprep
	9	+hostprogs-y := piggyback_32 btfixupprep
10	10	targets := tftpboot.img btfix.o btfix.S image zImage vmlinux.aout
11	11	clean-files := System.map
12	12
...	...	@@ -69,7 +69,7 @@
69	69
70	70	ifeq ($(CONFIG_SPARC64),y)
71	71	quiet_cmd_piggy = PIGGY $@
72		- cmd_piggy = $(obj)/piggyback_64 $@ System.map $(ROOT_IMG)
	72	+ cmd_piggy = $(obj)/piggyback_32 $(BITS) $@ System.map $(ROOT_IMG)
73	73	quiet_cmd_strip = STRIP $@
74	74	cmd_strip = $(STRIP) -R .comment -R .note -K sun4u_init -K _end -K _start vmlinux -o $@
75	75
...	...	@@ -82,7 +82,7 @@
82	82	$(obj)/zImage: $(obj)/image
83	83	$(call if_changed,gzip)
84	84
85		-$(obj)/tftpboot.img: $(obj)/image $(obj)/piggyback_64 System.map $(ROOT_IMG) FORCE
	85	+$(obj)/tftpboot.img: $(obj)/image $(obj)/piggyback_32 System.map $(ROOT_IMG) FORCE
86	86	$(call if_changed,elftoaout)
87	87	$(call if_changed,piggy)
88	88	@echo ' kernel: $@ is ready'
...	...	@@ -107,7 +107,8 @@
107	107	*
108	108	* Return 0 if either start or end is not found
109	109	*/
110		-static int get_start_end(const char filename, unsigned int start, unsigned int *end)
	110	+static int get_start_end(const char filename, unsigned int start,
	111	+ unsigned int *end)
111	112	{
112	113	FILE *map;
113	114	char buffer[1024];
114	115
...	...	@@ -131,11 +132,60 @@
131	132	return 1;
132	133	}
133	134
	135	+#define LOOKBACK (128 * 4)
	136	+#define BUFSIZE 1024
	137	+/*
	138	+ * Find the HdrS entry from head_32/head_64.
	139	+ * We check if it is at the beginning of the file (sparc64 case)
	140	+ * and if not we search for it.
	141	+ * When we search do so in steps of 4 as HdrS is on a 4-byte aligned
	142	+ * address (it is on same alignment as sparc instructions)
	143	+ * Return the offset to the HdrS entry (as off_t)
	144	+ */
	145	+static off_t get_hdrs_offset(int kernelfd, const char *filename)
	146	+{
	147	+ char buffer[BUFSIZE];
	148	+ off_t offset;
	149	+ int i;
	150	+
	151	+ if (lseek(kernelfd, 0, SEEK_SET) < 0)
	152	+ die("lseek");
	153	+ if (read(kernelfd, buffer, BUFSIZE) != BUFSIZE)
	154	+ die(filename);
	155	+
	156	+ if (buffer[40] == 'H' && buffer[41] == 'd' &&
	157	+ buffer[42] == 'r' && buffer[43] == 'S') {
	158	+ return 40;
	159	+ } else {
	160	+ /* Find the gokernel label */
	161	+ /* Decode offset from branch instruction */
	162	+ offset = ld2(buffer + AOUT_TEXT_OFFSET + 2) << 2;
	163	+ /* Go back 512 bytes so we do not miss HdrS */
	164	+ offset -= LOOKBACK;
	165	+ /* skip a.out header */
	166	+ offset += AOUT_TEXT_OFFSET;
	167	+ if (lseek(kernelfd, offset, SEEK_SET) < 0)
	168	+ die("lseek");
	169	+ if (read(kernelfd, buffer, BUFSIZE) != BUFSIZE)
	170	+ die(filename);
	171	+
	172	+ for (i = 0; i < LOOKBACK; i += 4) {
	173	+ if (buffer[i + 0] == 'H' && buffer[i + 1] == 'd' &&
	174	+ buffer[i + 2] == 'r' && buffer[i + 3] == 'S') {
	175	+ return offset + i;
	176	+ }
	177	+ }
	178	+ }
	179	+ fprintf (stderr, "Couldn't find headers signature in %s\n", filename);
	180	+ exit(1);
	181	+}
	182	+
134	183	int main(int argc,char **argv)
135	184	{
136	185	static char aout_magic[] = { 0x01, 0x03, 0x01, 0x07 };
137		- char buffer[1024], q, r;
138		- unsigned int i, start, end, offset;
	186	+ char buffer[1024];
	187	+ unsigned int i, start, end;
	188	+ off_t offset;
139	189	struct stat s;
140	190	int image, tail;
141	191
...	...	@@ -147,7 +197,8 @@
147	197	die(argv[4]);
148	198
149	199	if (!get_start_end(argv[3], &start, &end)) {
150		- fprintf (stderr, "Could not determine start and end from %s\n", argv[3]);
	200	+ fprintf(stderr, "Could not determine start and end from %s\n",
	201	+ argv[3]);
151	202	exit(1);
152	203	}
153	204	if ((image = open(argv[2], O_RDWR)) < 0)
154	205
...	...	@@ -159,27 +210,17 @@
159	210	exit(1);
160	211	}
161	212	/*
162		- * We need to fill in values for sparc_ramdisk_image + sparc_ramdisk_size
	213	+ * We need to fill in values for
	214	+ * sparc_ramdisk_image + sparc_ramdisk_size
163	215	* To locate these symbols search for the "HdrS" text which appear
164	216	* in the image a little before the gokernel symbol.
165	217	* See definition of these in init_32.S
166	218	*/
167	219
168		- /* Find the gokernel label */
169		- i = AOUT_TEXT_OFFSET + (ld2(buffer + AOUT_TEXT_OFFSET + 2) << 2) - 512;
170		- if (lseek(image, i, 0) < 0)
171		- die("lseek");
172		- if (read(image, buffer, 1024) != 1024)
173		- die(argv[2]);
174		- for (q = buffer, r = q + 512; q < r; q += 4) {
175		- if (*q == 'H' && q[1] == 'd' && q[2] == 'r' && q[3] == 'S')
176		- break;
177		- }
178		- if (q == r) {
179		- fprintf (stderr, "Couldn't find headers signature in the kernel.\n");
180		- exit(1);
181		- }
182		- offset = i + (q - buffer) + 10;
	220	+ offset = get_hdrs_offset(image, argv[2]);
	221	+ /* skip HdrS + LINUX_VERSION_CODE + HdrS version */
	222	+ offset += 10;
	223	+
183	224	if (lseek(image, offset, 0) < 0)
184	225	die("lseek");
185	226
...	...	@@ -197,6 +238,22 @@
197	238
198	239	if (write(image, buffer + 2, 14) != 14)
199	240	die(argv[2]);
	241	+
	242	+ /* For sparc64 update a_text and clear a_data + a_bss */
	243	+ if (is64bit)
	244	+ {
	245	+ if (lseek(image, 4, 0) < 0)
	246	+ die("lseek");
	247	+ /* a_text */
	248	+ st4(buffer, align(end + 32 + 8191) - (start & ~0x3fffffUL) +
	249	+ s.st_size);
	250	+ /* a_data */
	251	+ st4(buffer + 4, 0);
	252	+ /* a_bss */
	253	+ st4(buffer + 8, 0);
	254	+ if (write(image, buffer, 12) != 12)
	255	+ die(argv[2]);
	256	+ }
200	257
201	258	/* seek page aligned boundary in the image file and add boot image */
202	259	if (lseek(image, AOUT_TEXT_OFFSET - start + align(end + 32), 0) < 0)
1		-/*
2		- Simple utility to make a single-image install kernel with initial ramdisk
3		- for Sparc64 tftpbooting without need to set up nfs.
4		-
5		- Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
6		-
7		- This program is free software; you can redistribute it and/or modify
8		- it under the terms of the GNU General Public License as published by
9		- the Free Software Foundation; either version 2 of the License, or
10		- (at your option) any later version.
11		-
12		- This program is distributed in the hope that it will be useful,
13		- but WITHOUT ANY WARRANTY; without even the implied warranty of
14		- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15		- GNU General Public License for more details.
16		-
17		- You should have received a copy of the GNU General Public License
18		- along with this program; if not, write to the Free Software
19		- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
20		-
21		-#include <stdio.h>
22		-#include <string.h>
23		-#include <ctype.h>
24		-#include <errno.h>
25		-#include <fcntl.h>
26		-#include <dirent.h>
27		-#include <unistd.h>
28		-#include <stdlib.h>
29		-#include <sys/types.h>
30		-#include <sys/stat.h>
31		-
32		-/* Note: run this on an a.out kernel (use elftoaout for it), as PROM looks for a.out image onlly
33		- usage: piggyback vmlinux System.map tail, where tail is gzipped fs of the initial ramdisk */
34		-
35		-static void die(char *str)
36		-{
37		- perror (str);
38		- exit(1);
39		-}
40		-
41		-int main(int argc,char **argv)
42		-{
43		- char buffer [1024], q, r;
44		- unsigned int i, j, k, start, end, offset;
45		- FILE *map;
46		- struct stat s;
47		- int image, tail;
48		-
49		- start = end = 0;
50		- if (stat (argv[3], &s) < 0) die (argv[3]);
51		- map = fopen (argv[2], "r");
52		- if (!map) die(argv[2]);
53		- while (fgets (buffer, 1024, map)) {
54		- if (!strcmp (buffer + 19, "_start\n"))
55		- start = strtoul (buffer + 8, NULL, 16);
56		- else if (!strcmp (buffer + 19, "_end\n"))
57		- end = strtoul (buffer + 8, NULL, 16);
58		- }
59		- fclose (map);
60		- if ((image = open(argv[1],O_RDWR)) < 0) die(argv[1]);
61		- if (read(image,buffer,512) != 512) die(argv[1]);
62		- if (!memcmp (buffer, "\177ELF", 4)) {
63		- unsigned int p = (unsigned int )(buffer + (unsigned int )(buffer + 28));
64		-
65		- i = p[1] + (unsigned int )(buffer + 24) - p[2];
66		- if (lseek(image,i,0) < 0) die("lseek");
67		- if (read(image,buffer,512) != 512) die(argv[1]);
68		- j = 0;
69		- } else if ((unsigned int )buffer == 0x01030107) {
70		- i = j = 32;
71		- } else {
72		- fprintf (stderr, "Not ELF nor a.out. Don't blame me.\n");
73		- exit(1);
74		- }
75		- k = i;
76		- if (j == 32 && buffer[40] == 'H' && buffer[41] == 'd' && buffer[42] == 'r' && buffer[43] == 'S') {
77		- offset = 40 + 10;
78		- } else {
79		- i += (((unsigned short )(buffer + j + 2))<<2) - 512;
80		- if (lseek(image,i,0) < 0) die("lseek");
81		- if (read(image,buffer,1024) != 1024) die(argv[1]);
82		- for (q = buffer, r = q + 512; q < r; q += 4) {
83		- if (*q == 'H' && q[1] == 'd' && q[2] == 'r' && q[3] == 'S')
84		- break;
85		- }
86		- if (q == r) {
87		- fprintf (stderr, "Couldn't find headers signature in the kernel.\n");
88		- exit(1);
89		- }
90		- offset = i + (q - buffer) + 10;
91		- }
92		- if (lseek(image, offset, 0) < 0) die ("lseek");
93		- (unsigned )buffer = 0;
94		- (unsigned )(buffer + 4) = 0x01000000;
95		- (unsigned )(buffer + 8) = ((end + 32 + 8191) & ~8191);
96		- (unsigned )(buffer + 12) = s.st_size;
97		- if (write(image,buffer+2,14) != 14) die (argv[1]);
98		- if (lseek(image, 4, 0) < 0) die ("lseek");
99		- (unsigned )buffer = ((end + 32 + 8191) & ~8191) - (start & ~0x3fffffUL) + s.st_size;
100		- (unsigned )(buffer + 4) = 0;
101		- (unsigned )(buffer + 8) = 0;
102		- if (write(image,buffer,12) != 12) die (argv[1]);
103		- if (lseek(image, k - start + ((end + 32 + 8191) & ~8191), 0) < 0) die ("lseek");
104		- if ((tail = open(argv[3],O_RDONLY)) < 0) die(argv[3]);
105		- while ((i = read (tail,buffer,1024)) > 0)
106		- if (write(image,buffer,i) != i) die (argv[1]);
107		- if (close(image) < 0) die("close");
108		- if (close(tail) < 0) die("close");
109		- return 0;
110		-}