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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [arch/] [i386/] [boot/] [tools/] [build.c] - Blame information for rev 1777

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/*
 *  linux/tools/build.c
 *
 *  Copyright (C) 1991, 1992  Linus Torvalds
 */
 
/*
 * This file builds a disk-image from three different files:
 *
 * - bootsect: exactly 512 bytes of 8086 machine code, loads the rest
 * - setup: 8086 machine code, sets up system parm
 * - system: 80386 code for actual system
 *
 * It does some checking that all files are of the correct type, and
 * just writes the result to stdout, removing headers and padding to
 * the right amount. It also writes some system data to stderr.
 */
 
/*
 * Changes by tytso to allow root device specification
 * High loaded stuff by Hans Lermen & Werner Almesberger, Feb. 1996
 * Cross compiling fixes by Gertjan van Wingerde, July 1996
 */
 
#include <stdio.h>      /* fprintf */
#include <string.h>
#include <stdlib.h>     /* contains exit */
#include <sys/types.h>  /* unistd.h needs this */
#include <sys/stat.h>
#include <sys/sysmacros.h>
#include <unistd.h>     /* contains read/write */
#include <fcntl.h>
#include <linux/config.h>
#include <linux/a.out.h>
#include <errno.h>
 
 
#define MINIX_HEADER 32
 
#define N_MAGIC_OFFSET 1024
#ifndef __BFD__
static int GCC_HEADER = sizeof(struct exec);
#endif
 
#ifdef __BIG_KERNEL__
#define SYS_SIZE 0xffff
#else
#define SYS_SIZE DEF_SYSSIZE
#endif
 
#define DEFAULT_MAJOR_ROOT 0
#define DEFAULT_MINOR_ROOT 0
 
/* max nr of sectors of setup: don't change unless you also change
 * bootsect etc */
#define SETUP_SECTS 4
 
#define STRINGIFY(x) #x
 
typedef union {
        int i;
        long l;
        short s[2];
        char b[4];
} conv;
 
long intel_long(long l)
{
        conv t;
 
        t.b[0] = l & 0xff; l >>= 8;
        t.b[1] = l & 0xff; l >>= 8;
        t.b[2] = l & 0xff; l >>= 8;
        t.b[3] = l & 0xff; l >>= 8;
        return t.l;
}
 
int intel_int(int i)
{
        conv t;
 
        t.b[0] = i & 0xff; i >>= 8;
        t.b[1] = i & 0xff; i >>= 8;
        t.b[2] = i & 0xff; i >>= 8;
        t.b[3] = i & 0xff; i >>= 8;
        return t.i;
}
 
short intel_short(short l)
{
        conv t;
 
        t.b[0] = l & 0xff; l >>= 8;
        t.b[1] = l & 0xff; l >>= 8;
        return t.s[0];
}
 
void die(const char * str)
{
        fprintf(stderr,"%s\n",str);
        exit(1);
}
 
void usage(void)
{
        die("Usage: build bootsect setup system [rootdev] [> image]");
}
 
int main(int argc, char ** argv)
{
        int i,c,id,sz,tmp_int;
        unsigned long sys_size, tmp_long;
        char buf[1024];
#ifndef __BFD__
        struct exec *ex = (struct exec *)buf;
#endif
        char major_root, minor_root;
        struct stat sb;
        unsigned char setup_sectors;
 
        if ((argc < 4) || (argc > 5))
                usage();
        if (argc > 4) {
                if (!strcmp(argv[4], "CURRENT")) {
                        if (stat("/", &sb)) {
                                perror("/");
                                die("Couldn't stat /");
                        }
                        major_root = major(sb.st_dev);
                        minor_root = minor(sb.st_dev);
                } else if (strcmp(argv[4], "FLOPPY")) {
                        if (stat(argv[4], &sb)) {
                                perror(argv[4]);
                                die("Couldn't stat root device.");
                        }
                        major_root = major(sb.st_rdev);
                        minor_root = minor(sb.st_rdev);
                } else {
                        major_root = 0;
                        minor_root = 0;
                }
        } else {
                major_root = DEFAULT_MAJOR_ROOT;
                minor_root = DEFAULT_MINOR_ROOT;
        }
        fprintf(stderr, "Root device is (%d, %d)\n", major_root, minor_root);
        for (i=0;i<sizeof buf; i++) buf[i]=0;
        if ((id=open(argv[1],O_RDONLY,0))<0)
                die("Unable to open 'boot'");
        if (read(id,buf,MINIX_HEADER) != MINIX_HEADER)
                die("Unable to read header of 'boot'");
        if (((long *) buf)[0]!=intel_long(0x04100301))
                die("Non-Minix header of 'boot'");
        if (((long *) buf)[1]!=intel_long(MINIX_HEADER))
                die("Non-Minix header of 'boot'");
        if (((long *) buf)[3] != 0)
                die("Illegal data segment in 'boot'");
        if (((long *) buf)[4] != 0)
                die("Illegal bss in 'boot'");
        if (((long *) buf)[5] != 0)
                die("Non-Minix header of 'boot'");
        if (((long *) buf)[7] != 0)
                die("Illegal symbol table in 'boot'");
        i=read(id,buf,sizeof buf);
        fprintf(stderr,"Boot sector %d bytes.\n",i);
        if (i != 512)
                die("Boot block must be exactly 512 bytes");
        if ((*(unsigned short *)(buf+510)) != (unsigned short)intel_short(0xAA55))
                die("Boot block hasn't got boot flag (0xAA55)");
        buf[508] = (char) minor_root;
        buf[509] = (char) major_root;
        i=write(1,buf,512);
        if (i!=512)
                die("Write call failed");
        close (id);
 
        if ((id=open(argv[2],O_RDONLY,0))<0)
                die("Unable to open 'setup'");
        if (read(id,buf,MINIX_HEADER) != MINIX_HEADER)
                die("Unable to read header of 'setup'");
        if (((long *) buf)[0]!=intel_long(0x04100301))
                die("Non-Minix header of 'setup'");
        if (((long *) buf)[1]!=intel_long(MINIX_HEADER))
                die("Non-Minix header of 'setup'");
        if (((long *) buf)[3] != 0)
                die("Illegal data segment in 'setup'");
        if (((long *) buf)[4] != 0)
                die("Illegal bss in 'setup'");
        if (((long *) buf)[5] != 0)
                die("Non-Minix header of 'setup'");
        if (((long *) buf)[7] != 0)
                die("Illegal symbol table in 'setup'");
        for (i=0 ; (c=read(id,buf,sizeof buf))>0 ; i+=c )
#ifdef __BIG_KERNEL__
        {
                if (!i) {
                        /* Working with memcpy because of alignment constraints
                           on Sparc - Gertjan */
                        memcpy(&tmp_long, &buf[2], sizeof(long));
                        if (tmp_long != intel_long(0x53726448) )
                                die("Wrong magic in loader header of 'setup'");
                        memcpy(&tmp_int, &buf[6], sizeof(int));
                        if (tmp_int < intel_int(0x200))
                                die("Wrong version of loader header of 'setup'");
                        buf[0x11] = 1; /* LOADED_HIGH */
                        tmp_long = intel_long(0x100000);
                        memcpy(&buf[0x14], &tmp_long, sizeof(long));  /* code32_start */
                }
#endif
                if (write(1,buf,c)!=c)
                        die("Write call failed");
#ifdef __BIG_KERNEL__
        }
#endif
        if (c != 0)
                die("read-error on 'setup'");
        close (id);
        setup_sectors = (unsigned char)((i + 511) / 512);
        /* for compatibility with LILO */
        if (setup_sectors < SETUP_SECTS)
                setup_sectors = SETUP_SECTS;
        fprintf(stderr,"Setup is %d bytes.\n",i);
        for (c=0 ; c<sizeof(buf) ; c++)
                buf[c] = '\0';
        while (i < setup_sectors * 512) {
                c = setup_sectors * 512 - i;
                if (c > sizeof(buf))
                        c = sizeof(buf);
                if (write(1,buf,c) != c)
                        die("Write call failed");
                i += c;
        }
 
        if ((id=open(argv[3],O_RDONLY,0))<0)
                die("Unable to open 'system'");
#ifndef __BFD__
        if (read(id,buf,GCC_HEADER) != GCC_HEADER)
                die("Unable to read header of 'system'");
        if (N_MAGIC(*ex) == ZMAGIC) {
                GCC_HEADER = N_MAGIC_OFFSET;
                lseek(id, GCC_HEADER, SEEK_SET);
        } else if (N_MAGIC(*ex) != QMAGIC)
                die("Non-GCC header of 'system'");
        fprintf(stderr,"System is %d kB (%d kB code, %d kB data and %d kB bss)\n",
                (ex->a_text+ex->a_data+ex->a_bss)/1024,
                ex->a_text /1024,
                ex->a_data /1024,
                ex->a_bss  /1024);
        sz = N_SYMOFF(*ex) - GCC_HEADER + 4;
#else
        if (fstat (id, &sb)) {
          perror ("fstat");
          die ("Unable to stat 'system'");
        }
        sz = sb.st_size;
        fprintf (stderr, "System is %d kB\n", sz/1024);
#endif
        sys_size = (sz + 15) / 16;
        if (sys_size > SYS_SIZE)
                die("System is too big");
        while (sz > 0) {
                int l, n;
 
                l = sz;
                if (l > sizeof(buf))
                        l = sizeof(buf);
                if ((n=read(id, buf, l)) != l) {
                        if (n == -1)
                                perror(argv[1]);
                        else
                                fprintf(stderr, "Unexpected EOF\n");
                        die("Can't read 'system'");
                }
                if (write(1, buf, l) != l)
                        die("Write failed");
                sz -= l;
        }
        close(id);
        if (lseek(1, 497, 0) == 497) {
                if (write(1, &setup_sectors, 1) != 1)
                        die("Write of setup sectors failed");
        }
        if (lseek(1,500,0) == 500) {
                buf[0] = (sys_size & 0xff);
                buf[1] = ((sys_size >> 8) & 0xff);
                if (write(1, buf, 2) != 2)
                        die("Write failed");
        }
        return(0);
}

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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [arch/] [i386/] [boot/] [tools/] [build.c] - Blame information for rev 1777

Line No.	Rev	Author	Line
1	1623	jcastillo	`/*`
2			`* linux/tools/build.c`
3			`*`
4			`* Copyright (C) 1991, 1992 Linus Torvalds`
5			`*/`
6
7			`/*`
8			`* This file builds a disk-image from three different files:`
9			`*`
10			`* - bootsect: exactly 512 bytes of 8086 machine code, loads the rest`
11			`* - setup: 8086 machine code, sets up system parm`
12			`* - system: 80386 code for actual system`
13			`*`
14			`* It does some checking that all files are of the correct type, and`
15			`* just writes the result to stdout, removing headers and padding to`
16			`* the right amount. It also writes some system data to stderr.`
17			`*/`
18
19			`/*`
20			`* Changes by tytso to allow root device specification`
21			`* High loaded stuff by Hans Lermen & Werner Almesberger, Feb. 1996`
22			`* Cross compiling fixes by Gertjan van Wingerde, July 1996`
23			`*/`
24
25			`#include <stdio.h> /* fprintf */`
26			`#include <string.h>`
27			`#include <stdlib.h> /* contains exit */`
28			`#include <sys/types.h> /* unistd.h needs this */`
29			`#include <sys/stat.h>`
30			`#include <sys/sysmacros.h>`
31			`#include <unistd.h> /* contains read/write */`
32			`#include <fcntl.h>`
33			`#include <linux/config.h>`
34			`#include <linux/a.out.h>`
35			`#include <errno.h>`
36
37
38			`#define MINIX_HEADER 32`
39
40			`#define N_MAGIC_OFFSET 1024`
41			`#ifndef __BFD__`
42			`static int GCC_HEADER = sizeof(struct exec);`
43			`#endif`
44
45			`#ifdef __BIG_KERNEL__`
46			`#define SYS_SIZE 0xffff`
47			`#else`
48			`#define SYS_SIZE DEF_SYSSIZE`
49			`#endif`
50
51			`#define DEFAULT_MAJOR_ROOT 0`
52			`#define DEFAULT_MINOR_ROOT 0`
53
54			`/* max nr of sectors of setup: don't change unless you also change`
55			`* bootsect etc */`
56			`#define SETUP_SECTS 4`
57
58			`#define STRINGIFY(x) #x`
59
60			`typedef union {`
61			`int i;`
62			`long l;`
63			`short s[2];`
64			`char b[4];`
65			`} conv;`
66
67			`long intel_long(long l)`
68			`{`
69			`conv t;`
70
71			`t.b[0] = l & 0xff; l >>= 8;`
72			`t.b[1] = l & 0xff; l >>= 8;`
73			`t.b[2] = l & 0xff; l >>= 8;`
74			`t.b[3] = l & 0xff; l >>= 8;`
75			`return t.l;`
76			`}`
77
78			`int intel_int(int i)`
79			`{`
80			`conv t;`
81
82			`t.b[0] = i & 0xff; i >>= 8;`
83			`t.b[1] = i & 0xff; i >>= 8;`
84			`t.b[2] = i & 0xff; i >>= 8;`
85			`t.b[3] = i & 0xff; i >>= 8;`
86			`return t.i;`
87			`}`
88
89			`short intel_short(short l)`
90			`{`
91			`conv t;`
92
93			`t.b[0] = l & 0xff; l >>= 8;`
94			`t.b[1] = l & 0xff; l >>= 8;`
95			`return t.s[0];`
96			`}`
97
98			`void die(const char * str)`
99			`{`
100			`fprintf(stderr,"%s\n",str);`
101			`exit(1);`
102			`}`
103
104			`void usage(void)`
105			`{`
106			`die("Usage: build bootsect setup system [rootdev] [> image]");`
107			`}`
108
109			`int main(int argc, char ** argv)`
110			`{`
111			`int i,c,id,sz,tmp_int;`
112			`unsigned long sys_size, tmp_long;`
113			`char buf[1024];`
114			`#ifndef __BFD__`
115			`struct exec ex = (struct exec )buf;`
116			`#endif`
117			`char major_root, minor_root;`
118			`struct stat sb;`
119			`unsigned char setup_sectors;`
120
121			`if ((argc < 4) \|\| (argc > 5))`
122			`usage();`
123			`if (argc > 4) {`
124			`if (!strcmp(argv[4], "CURRENT")) {`
125			`if (stat("/", &sb)) {`
126			`perror("/");`
127			`die("Couldn't stat /");`
128			`}`
129			`major_root = major(sb.st_dev);`
130			`minor_root = minor(sb.st_dev);`
131			`} else if (strcmp(argv[4], "FLOPPY")) {`
132			`if (stat(argv[4], &sb)) {`
133			`perror(argv[4]);`
134			`die("Couldn't stat root device.");`
135			`}`
136			`major_root = major(sb.st_rdev);`
137			`minor_root = minor(sb.st_rdev);`
138			`} else {`
139			`major_root = 0;`
140			`minor_root = 0;`
141			`}`
142			`} else {`
143			`major_root = DEFAULT_MAJOR_ROOT;`
144			`minor_root = DEFAULT_MINOR_ROOT;`
145			`}`
146			`fprintf(stderr, "Root device is (%d, %d)\n", major_root, minor_root);`
147			`for (i=0;i<sizeof buf; i++) buf[i]=0;`
148			`if ((id=open(argv[1],O_RDONLY,0))<0)`
149			`die("Unable to open 'boot'");`
150			`if (read(id,buf,MINIX_HEADER) != MINIX_HEADER)`
151			`die("Unable to read header of 'boot'");`
152			`if (((long *) buf)[0]!=intel_long(0x04100301))`
153			`die("Non-Minix header of 'boot'");`
154			`if (((long *) buf)[1]!=intel_long(MINIX_HEADER))`
155			`die("Non-Minix header of 'boot'");`
156			`if (((long *) buf)[3] != 0)`
157			`die("Illegal data segment in 'boot'");`
158			`if (((long *) buf)[4] != 0)`
159			`die("Illegal bss in 'boot'");`
160			`if (((long *) buf)[5] != 0)`
161			`die("Non-Minix header of 'boot'");`
162			`if (((long *) buf)[7] != 0)`
163			`die("Illegal symbol table in 'boot'");`
164			`i=read(id,buf,sizeof buf);`
165			`fprintf(stderr,"Boot sector %d bytes.\n",i);`
166			`if (i != 512)`
167			`die("Boot block must be exactly 512 bytes");`
168			`if (((unsigned short )(buf+510)) != (unsigned short)intel_short(0xAA55))`
169			`die("Boot block hasn't got boot flag (0xAA55)");`
170			`buf[508] = (char) minor_root;`
171			`buf[509] = (char) major_root;`
172			`i=write(1,buf,512);`
173			`if (i!=512)`
174			`die("Write call failed");`
175			`close (id);`
176
177			`if ((id=open(argv[2],O_RDONLY,0))<0)`
178			`die("Unable to open 'setup'");`
179			`if (read(id,buf,MINIX_HEADER) != MINIX_HEADER)`
180			`die("Unable to read header of 'setup'");`
181			`if (((long *) buf)[0]!=intel_long(0x04100301))`
182			`die("Non-Minix header of 'setup'");`
183			`if (((long *) buf)[1]!=intel_long(MINIX_HEADER))`
184			`die("Non-Minix header of 'setup'");`
185			`if (((long *) buf)[3] != 0)`
186			`die("Illegal data segment in 'setup'");`
187			`if (((long *) buf)[4] != 0)`
188			`die("Illegal bss in 'setup'");`
189			`if (((long *) buf)[5] != 0)`
190			`die("Non-Minix header of 'setup'");`
191			`if (((long *) buf)[7] != 0)`
192			`die("Illegal symbol table in 'setup'");`
193			`for (i=0 ; (c=read(id,buf,sizeof buf))>0 ; i+=c )`
194			`#ifdef __BIG_KERNEL__`
195			`{`
196			`if (!i) {`
197			`/* Working with memcpy because of alignment constraints`
198			`on Sparc - Gertjan */`
199			`memcpy(&tmp_long, &buf[2], sizeof(long));`
200			`if (tmp_long != intel_long(0x53726448) )`
201			`die("Wrong magic in loader header of 'setup'");`
202			`memcpy(&tmp_int, &buf[6], sizeof(int));`
203			`if (tmp_int < intel_int(0x200))`
204			`die("Wrong version of loader header of 'setup'");`
205			`buf[0x11] = 1; /* LOADED_HIGH */`
206			`tmp_long = intel_long(0x100000);`
207			`memcpy(&buf[0x14], &tmp_long, sizeof(long)); /* code32_start */`
208			`}`
209			`#endif`
210			`if (write(1,buf,c)!=c)`
211			`die("Write call failed");`
212			`#ifdef __BIG_KERNEL__`
213			`}`
214			`#endif`
215			`if (c != 0)`
216			`die("read-error on 'setup'");`
217			`close (id);`
218			`setup_sectors = (unsigned char)((i + 511) / 512);`
219			`/* for compatibility with LILO */`
220			`if (setup_sectors < SETUP_SECTS)`
221			`setup_sectors = SETUP_SECTS;`
222			`fprintf(stderr,"Setup is %d bytes.\n",i);`
223			`for (c=0 ; c<sizeof(buf) ; c++)`
224			`buf[c] = '\0';`
225			`while (i < setup_sectors * 512) {`
226			`c = setup_sectors * 512 - i;`
227			`if (c > sizeof(buf))`
228			`c = sizeof(buf);`
229			`if (write(1,buf,c) != c)`
230			`die("Write call failed");`
231			`i += c;`
232			`}`
233
234			`if ((id=open(argv[3],O_RDONLY,0))<0)`
235			`die("Unable to open 'system'");`
236			`#ifndef __BFD__`
237			`if (read(id,buf,GCC_HEADER) != GCC_HEADER)`
238			`die("Unable to read header of 'system'");`
239			`if (N_MAGIC(*ex) == ZMAGIC) {`
240			`GCC_HEADER = N_MAGIC_OFFSET;`
241			`lseek(id, GCC_HEADER, SEEK_SET);`
242			`} else if (N_MAGIC(*ex) != QMAGIC)`
243			`die("Non-GCC header of 'system'");`
244			`fprintf(stderr,"System is %d kB (%d kB code, %d kB data and %d kB bss)\n",`
245			`(ex->a_text+ex->a_data+ex->a_bss)/1024,`
246			`ex->a_text /1024,`
247			`ex->a_data /1024,`
248			`ex->a_bss /1024);`
249			`sz = N_SYMOFF(*ex) - GCC_HEADER + 4;`
250			`#else`
251			`if (fstat (id, &sb)) {`
252			`perror ("fstat");`
253			`die ("Unable to stat 'system'");`
254			`}`
255			`sz = sb.st_size;`
256			`fprintf (stderr, "System is %d kB\n", sz/1024);`
257			`#endif`
258			`sys_size = (sz + 15) / 16;`
259			`if (sys_size > SYS_SIZE)`
260			`die("System is too big");`
261			`while (sz > 0) {`
262			`int l, n;`
263
264			`l = sz;`
265			`if (l > sizeof(buf))`
266			`l = sizeof(buf);`
267			`if ((n=read(id, buf, l)) != l) {`
268			`if (n == -1)`
269			`perror(argv[1]);`
270			`else`
271			`fprintf(stderr, "Unexpected EOF\n");`
272			`die("Can't read 'system'");`
273			`}`
274			`if (write(1, buf, l) != l)`
275			`die("Write failed");`
276			`sz -= l;`
277			`}`
278			`close(id);`
279			`if (lseek(1, 497, 0) == 497) {`
280			`if (write(1, &setup_sectors, 1) != 1)`
281			`die("Write of setup sectors failed");`
282			`}`
283			`if (lseek(1,500,0) == 500) {`
284			`buf[0] = (sys_size & 0xff);`
285			`buf[1] = ((sys_size >> 8) & 0xff);`
286			`if (write(1, buf, 2) != 2)`
287			`die("Write failed");`
288			`}`
289			`return(0);`
290			`}`