ns = ph + ps; 
ns = ph + 2 * ps; 
main(int ac, char **av){	int fd, n, i;	int ph, ps, np;	int nnote, ns;	if (ac != 2) {		fprintf(stderr, "Usage: %s elf-file\n", av[0]);		exit(1);	}	fd = open(av[1], O_RDWR);	if (fd < 0) {		perror(av[1]);		exit(1);	}	nnote = strlen(arch) + 1 + (N_DESCR + 3) * 4;	n = read(fd, buf, sizeof(buf));	if (n < 0) {		perror("read");		exit(1);	}	if (n < E_HSIZE || memcmp(&buf[E_IDENT+EI_MAGIC], elf_magic, 4) != 0)		goto notelf;	if (buf[E_IDENT+EI_CLASS] != ELFCLASS32	    || buf[E_IDENT+EI_DATA] != ELFDATA2MSB) {		fprintf(stderr, "%s is not a big-endian 32-bit ELF image\n",			av[1]);		exit(1);	}	ph = GET_32BE(E_PHOFF);	ps = GET_16BE(E_PHENTSIZE);	np = GET_16BE(E_PHNUM);	if (ph < E_HSIZE || ps < PH_HSIZE || np < 1)		goto notelf;	if (ph + (np + 1) * ps + nnote > n)		goto nospace;	for (i = 0; i < np; ++i) {		if (GET_32BE(ph + PH_TYPE) == PT_NOTE) {			fprintf(stderr, "%s already has a note entry\n",				av[1]);			exit(0);		}		ph += ps;	}	/* XXX check that the area we want to use is all zeroes */	for (i = 0; i < ps + nnote; ++i)		if (buf[ph + i] != 0)			goto nospace;	/* fill in the program header entry */	ns = ph + ps;	PUT_32BE(ph + PH_TYPE, PT_NOTE);	PUT_32BE(ph + PH_OFFSET, ns);	PUT_32BE(ph + PH_FILESZ, nnote);	/* fill in the note area we point to */	/* XXX we should probably make this a proper section */	PUT_32BE(ns, strlen(arch) + 1);	PUT_32BE(ns + 4, N_DESCR * 4);	PUT_32BE(ns + 8, 0x1275);	strcpy(&buf[ns + 12], arch);	ns += 12 + strlen(arch) + 1;	for (i = 0; i < N_DESCR; ++i)		PUT_32BE(ns + i * 4, descr[i]);	/* Update the number of program headers */	PUT_16BE(E_PHNUM, np + 1);	/* write back */	lseek(fd, (long) 0, SEEK_SET);	i = write(fd, buf, n);	if (i < 0) {		perror("write");		exit(1);	}	if (i < n) {		fprintf(stderr, "%s: write truncated\n", av[1]);		exit(1);	}	exit(0); notelf:	fprintf(stderr, "%s does not appear to be an ELF file\n", av[0]);	exit(1); nospace:	fprintf(stderr, "sorry, I can't find space in %s to put the note\n",		av[0]);	exit(1);}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/66faf9845a05905d75da380767e93455f3e6d620/addnote.c/buggy/arch/ppc64/boot/addnote.c