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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <a.out.h>
typedef unsigned char byte;
typedef unsigned short word;
typedef unsigned long u32;
void die(const char * str, ...)
{
va_list args;
va_start(args, str);
vfprintf(stderr, str, args);
fputc('\n', stderr);
exit (1);
}
int main(int argc, char **argv)
{
void *data;
struct exec ex;
FILE *f;
int totlen;
if (argc < 2) {
fprintf(stderr, "Usage: build kernel-name\n");
exit(1);
}
f = fopen(argv[1], "rb");
if (!f)
die("Unable to open `%s': %m", argv[1]);
fread(&ex, 1, sizeof(ex), f);
if(N_MAGIC(ex) == ZMAGIC) {
fseek(f, 4096, SEEK_SET);
totlen = ex.a_text + ex.a_data;
} else
if(N_MAGIC(ex) == QMAGIC) {
unsigned long my_header;
fseek(f, 4, SEEK_SET);
my_header = 0xea000006;
fwrite(&my_header, 4, 1, stdout);
totlen = ex.a_text + ex.a_data - 4;
} else {
fprintf(stderr, "Unacceptable a.out header on kernel\n");
fclose(f);
exit(1);
}
fprintf(stderr, "Kernel is %dk (%dk text, %dk data, %dk bss)\n",
(ex.a_text + ex.a_data + ex.a_bss)/1024,
ex.a_text/1024, ex.a_data/1024, ex.a_bss/1024);
data = malloc(totlen);
fread(data, 1, totlen, f);
fwrite(data, 1, totlen, stdout);
free(data);
fclose(f);
fflush(stdout);
return 0;
}
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