doit.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:2k
- /*
- * By RidgeRun Inc.
- *
- * The input to this program is intended to be
- * a compressed linux kernel. The output of this
- * program is then a constructed *.S file which
- * defines a large data structure -- the contents
- * of which represent the compressed kernel which
- * can subsequently be used in a program designed
- * to access that struture for decompression at
- * runtime and then subsequent kernel bootup.
- *
- * Example Usage:
- * ./doit < piggy.gz > piggy.S
- *
- */
- #include <stdio.h>
- void printval(int i)
- {
- int tth, th, h, t, d;
- if (i > 99999) {
- printf("Error - printval outofboundsn");
- return;
- }
- tth = 0;
- th = 0;
- //tth = (i) / 10000;
- //th = (i - (tth * 10000)) / 1000;
- h = (i - ((tth * 10000) + (th * 1000))) / 100;
- t = (i - ((tth * 10000) + (th * 1000) + (h * 100))) / 10;
- d = (i - ((tth * 10000) + (th * 1000) + (h * 100) + (t * 10)));
- //putchar(tth + '0');
- //putchar(th + '0');
- putchar(h + '0');
- putchar(t + '0');
- putchar(d + '0');
- }
- main(int argc, char **argv)
- {
- int val;
- int size = 0;
- unsigned char c;
- printf("gcc2_compiled.:n");
- printf("__gnu_compiled_c:n");
- printf("t.globl linux_compressed_startn");
- printf("t.textn");
- printf("t.align 2n");
- printf("t.type linux_compressed_start,@objectn");
- printf("linux_compressed_start:n");
- val = getchar();
- while (val != EOF) {
- size++;
- c = (unsigned char) (val & 0x00ff);
- printf("t.byte ");
- printval((int) c);
- printf("n");
- val = getchar();
- }
- printf("t.size linux_compressed_start,%dn", size);
- printf("t.globl linux_compressed_sizen");
- printf("t.textn");
- printf("t.align 2n");
- printf("t.type linux_compressed_size,@objectn");
- printf("t.size linux_compressed_size,4n");
- printf("linux_compressed_size:n");
- printf("t.word %dn", size);
- }