openbios/openboot/tools/dropin/finddropin.c

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• Hash : 1a08f436
  Author :
  Date : 2010-08-25T09:23:17
  

  change to well-formed svn directory structure. git-svn-id: svn://coreboot.org/openboot/trunk@2 4486e004-3823-0410-90c7-fb508cc143bb

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• tools/dropin/finddropin.c

• /*
  * ========== Copyright Header Begin ==========================================
  *
  * Hypervisor Software File: finddropin.c
  * 
  * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
  * 
  *  - Do no alter or remove copyright notices
  * 
  *  - Redistribution and use of this software in source and binary forms, with 
  *    or without modification, are permitted provided that the following 
  *    conditions are met: 
  * 
  *  - Redistribution of source code must retain the above copyright notice, 
  *    this list of conditions and the following disclaimer.
  * 
  *  - Redistribution in binary form must reproduce the above copyright notice,
  *    this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution. 
  * 
  *    Neither the name of Sun Microsystems, Inc. or the names of contributors 
  * may be used to endorse or promote products derived from this software 
  * without specific prior written permission. 
  * 
  *     This software is provided "AS IS," without a warranty of any kind. 
  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, 
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A 
  * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN 
  * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR 
  * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR 
  * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN 
  * OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR 
  * FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE 
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, 
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF 
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
  * 
  * You acknowledge that this software is not designed, licensed or
  * intended for use in the design, construction, operation or maintenance of
  * any nuclear facility. 
  * 
  * ========== Copyright Header End ============================================
  */
  /*
   * id: @(#)finddropin.c 1.1 03/04/01
   * purpose: 
   * copyright: Copyright 2000, 2003 Sun Microsystems, Inc.  All Rights Reserved
   * copyright: Use is subject to license terms.
   */
  
  #include <sys/dilib.h>
  #include <strings.h>
  #include <stdlib.h>
  #include <unistd.h>
  #include <stdio.h>
  
  caddr_t
  extract_string(dropin_data_t *data)
  {
  	int32_t len = data->size+1;
  	static char str[0x80];
  
  	if (len > 0x80) {
  		return (NULL);
  	}
  	memset(str, 0, len);
  	strncpy(str, (caddr_t)data->data, data->size);
  	return (strdup(str));
  }
  
  static uchar_t *
  do_lempel_ziv(uchar_t *src, int32_t len, int32_t dlen, int32_t verbose)
  {
  	uchar_t *data, *dbuf;
  	int32_t nlen = 0;
  
  	dbuf = (uchar_t *)malloc(dlen);
  	if (dbuf == NULL) {
  		di_bail("Malloc Failed");
  		return (0);
  	}
  	nlen = di_decomp(src, len, dbuf);
  	if (verbose > 0) {
  		printf("Decompress: %d/%d bytes, [%d], ratio %2.2f:1\n",
  		    len, dlen, nlen, (((float)dlen)/((float)len)));
  	}
  	data = (uchar_t *)malloc(dlen);
  	if (data == NULL) {
  		di_bail("Malloc Failed");
  		return (0);
  	}
  	memcpy(data, dbuf, dlen);
  	free(dbuf);
  	return (data);
  }
  
  int32_t
  di_getdata(obmd_t *src, int32_t verbose, dropin_data_t *rdata)
  {
  	uint32_t *dptr = (uint32_t *)((caddr_t)src + OBMD_HDR);
  	uchar_t *data = (uchar_t *)dptr;
  	int32_t  dlen = src->size;
  	compresshdr *chdr = (compresshdr *) dptr;
  
  	if ((chdr->magic == COMP_MAGIC) && (src->size == chdr->comp_size)) {
  		int32_t clen = chdr->comp_size;
  		int32_t type = chdr->type;
  		dlen = chdr->decomp_size;
  
  		switch (type) {
  		case COMP_MAGIC:
  			if (verbose > 0) {
  				printf("[COMP: %x,%x]\n", clen, dlen);
  			}
  			data = do_lempel_ziv(data+sizeof (compresshdr),
  			    clen, dlen, (verbose-1));
  			dptr = (uint32_t *)data;
  			break;
  
  		default:
  			printf("Unknown compression type: %d\n", type);
  			break;
  		}
  	}
  
  	rdata->data = data;
  	rdata->size = dlen;
  	if (dptr[0] == OBME_MAGIC) {
  		rdata->data += sizeof (obme_t);
  		rdata->size -= sizeof (obme_t);
  	}
  	return (0);
  }
  
  int32_t
  di_isdropin(obmd_t *src)
  {
  	return (strncmp((caddr_t)src, "OBMD", 4) == 0);
  }
  
  int32_t
  di_islevel2(obmd_t *src)
  {
  	uchar_t *bdata = ((uchar_t *)src)+OBMD_HDR;
  	int32_t *data = (int32_t *)bdata;
  	return (di_isdropin(src) && (data[0] == OBME_MAGIC));
  }
  
  static obmd_t *
  di_iterate(caddr_t name, obmd_t *src, int32_t size, int32_t verbose,
  	int32_t instance)
  {
  	int32_t dlen, bytes = 0;
  	int32_t num_found = 1;
  	obmd_t *found = NULL;
  	uchar_t *next;
  
  
  	if (verbose > 0) {
  		printf("di_iterate: '%s'\n", name);
  	}
  	/*
  	 * Iterate through the chunk looking for dropins
  	 */
  	while ((found == NULL) && (bytes < size) && (num_found <= instance)) {
  		next = (uchar_t *)src;
  		while (*next == 1) {
  			next++;
  			bytes++;
  		}
  		src = (obmd_t *)next;
  		if (!di_isdropin(src)) break;
  		if (verbose > 0) {
  			printf("..di: '%s' [%d]\n", src->name, src->size);
  			printf("instance = %i\n", instance);
  		}
  		if (strcmp(name, src->name) == 0) {
  			if (instance == num_found)
  				found = src;
  			else {
  				num_found++;
  				dlen = src->size + OBMD_HDR;
  				next += dlen;
  				bytes += dlen;
  				src = (obmd_t *)next;
  			}
  		} else {
  			dlen = src->size + OBMD_HDR;
  			next += dlen;
  			bytes += dlen;
  			src = (obmd_t *)next;
  		}
  	}
  	return (found);
  }
  
  obmd_t *
  di_finddropin(caddr_t name, obmd_t *src, int32_t filesize,
  	int32_t verbose, int32_t instance)
  {
  	caddr_t dir;
  	obmd_t *data = NULL;
  	caddr_t container;
  	caddr_t slash;
  	uchar_t *shift;
  	uchar_t *next;
  	dropin_data_t dropin_data;
  	int32_t i = 0;
  	int32_t size = filesize;
  
  
  
  	shift = (uchar_t *)src;
  	while (*shift == 1) {
  		if (verbose > 0) printf("x");
  		shift++;
  	}
  	src = (obmd_t *)shift;
  	if (*name == '/') {
  		name++;
  		di_getdata(src, (verbose-1), &dropin_data);
  		src = (obmd_t *)dropin_data.data;
  		size = dropin_data.size;
  	}
  	if (*name == 0) {
  		if (verbose > 0) {
  			printf("<empty filename>\n");
  		}
  		return (NULL);
  	}
  	if (!di_isdropin(src)) {
  		if (verbose > 0) {
  			printf("<Not a dropin>\n");
  		}
  		return (NULL);
  	}
  	if (size <= 0) {
  		if (verbose > 0) {
  			printf("<no more bytes>\n");
  		}
  		return (NULL);
  	}
  	container = strdup(name);
  	dir = slash = strchr(container, '/');
  	if (slash) {
  		*slash = 0;
  		dir = slash+1;
  	}
  	if (verbose > 0) {
  		printf("Path: %s [%x]\n", name, size);
  	}
  
  	next = (uchar_t *)src;
  	while ((++i <= instance) && (src != NULL)) {
  		data = di_iterate(container, src, filesize, (verbose-1), 1);
  		next += (src->size + OBMD_HDR);
  		src = (obmd_t *)next;
  	}
  
  	if (data != NULL) {
  		obmd_t *new;
  		int32_t new_size;
  		/*
  		 * we found it
  		 */
  		if (verbose > 0) {
  			printf("Dropin: '%s', [%d]\n", data->name, data->size);
  		}
  		if (dir) {
  			di_getdata(data, (verbose-1), &dropin_data);
  			new = (obmd_t *)dropin_data.data;
  			new_size = dropin_data.size;
  			if (verbose > 0) {
  				printf("Descending into: %s [%d]\n",
  				    data->name, data->size);
  			}
  			data = di_finddropin(dir, new, new_size,
  							(verbose-1), 1);
  		}
  	}
  	return (data);
  }
  

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