1 e8a7b969 2004-12-27 devnull #include <u.h>
  2 e8a7b969 2004-12-27 devnull #include <libc.h>
  3 e8a7b969 2004-12-27 devnull #include <mach.h>
  4 e8a7b969 2004-12-27 devnull #include "elf.h"
  5 e8a7b969 2004-12-27 devnull 
  6 e8a7b969 2004-12-27 devnull /*
  7 e8a7b969 2004-12-27 devnull aggr Linkdebug
  8 e8a7b969 2004-12-27 devnull {
  9 e8a7b969 2004-12-27 devnull 	'X' 0 version;
 10 e8a7b969 2004-12-27 devnull 	'X' 4 map;
 11 e8a7b969 2004-12-27 devnull };
 12 e8a7b969 2004-12-27 devnull 
 13 e8a7b969 2004-12-27 devnull aggr Linkmap
 14 e8a7b969 2004-12-27 devnull {
 15 e8a7b969 2004-12-27 devnull 	'X' 0 addr;
 16 e8a7b969 2004-12-27 devnull 	'X' 4 name;
 17 e8a7b969 2004-12-27 devnull 	'X' 8 dynsect;
 18 e8a7b969 2004-12-27 devnull 	'X' 12 next;
 19 e8a7b969 2004-12-27 devnull 	'X' 16 prev;
 20 e8a7b969 2004-12-27 devnull };
 21 e8a7b969 2004-12-27 devnull */
 22 e8a7b969 2004-12-27 devnull enum
 23 e8a7b969 2004-12-27 devnull {
 24 e8a7b969 2004-12-27 devnull 	DT_NULL = 0,
 25 e8a7b969 2004-12-27 devnull 	DT_NEEDED,
 26 e8a7b969 2004-12-27 devnull 	DT_PLTRRELSZ,
 27 e8a7b969 2004-12-27 devnull 	DT_PLTGOT,
 28 e8a7b969 2004-12-27 devnull 	DT_HASH,
 29 e8a7b969 2004-12-27 devnull 	DT_STRTAB,
 30 e8a7b969 2004-12-27 devnull 	DT_SYMTAB,
 31 e8a7b969 2004-12-27 devnull 	DT_RELA,
 32 e8a7b969 2004-12-27 devnull 	DT_RELASZ = 8,
 33 e8a7b969 2004-12-27 devnull 	DT_RELAENT,
 34 e8a7b969 2004-12-27 devnull 	DT_STSZ,
 35 e8a7b969 2004-12-27 devnull 	DT_SYMENT,
 36 e8a7b969 2004-12-27 devnull 	DT_INIT,
 37 e8a7b969 2004-12-27 devnull 	DT_FINI,
 38 e8a7b969 2004-12-27 devnull 	DT_SONAME,
 39 e8a7b969 2004-12-27 devnull 	DT_RPATH,
 40 e8a7b969 2004-12-27 devnull 	DT_SYMBOLIC = 16,
 41 e8a7b969 2004-12-27 devnull 	DT_REL,
 42 e8a7b969 2004-12-27 devnull 	DT_RELSZ,
 43 e8a7b969 2004-12-27 devnull 	DT_RELENT,
 44 e8a7b969 2004-12-27 devnull 	DT_PLTREL,
 45 e8a7b969 2004-12-27 devnull 	DT_DEBUG,
 46 e8a7b969 2004-12-27 devnull 	DT_TEXTREL,
 47 cbeb0b26 2006-04-01 devnull 	DT_JMPREL
 48 e8a7b969 2004-12-27 devnull };
 49 e8a7b969 2004-12-27 devnull 
 50 e8a7b969 2004-12-27 devnull static int
 51 e8a7b969 2004-12-27 devnull getstr(Map *map, ulong addr, char *buf, uint nbuf)
 52 e8a7b969 2004-12-27 devnull {
 53 e8a7b969 2004-12-27 devnull 	int i;
 54 e8a7b969 2004-12-27 devnull 
 55 e8a7b969 2004-12-27 devnull 	for(i=0; i<nbuf; i++){
 56 399ab50a 2005-01-14 devnull 		if(get1(map, addr+i, (uchar*)buf+i, 1) < 0)
 57 e8a7b969 2004-12-27 devnull 			return -1;
 58 e8a7b969 2004-12-27 devnull 		if(buf[i] == 0)
 59 e8a7b969 2004-12-27 devnull 			return 0;
 60 e8a7b969 2004-12-27 devnull 	}
 61 e8a7b969 2004-12-27 devnull 	return -1;	/* no nul */
 62 e8a7b969 2004-12-27 devnull }
 63 e8a7b969 2004-12-27 devnull 
 64 e8a7b969 2004-12-27 devnull static ulong
 65 e8a7b969 2004-12-27 devnull dyninfo(Fhdr *hdr, int x)
 66 e8a7b969 2004-12-27 devnull {
 67 e8a7b969 2004-12-27 devnull 	u32int addr, u;
 68 e8a7b969 2004-12-27 devnull 
 69 e8a7b969 2004-12-27 devnull 	if(hdr == nil || (addr = ((Elf*)hdr->elf)->dynamic) == 0){
 70 e8a7b969 2004-12-27 devnull 		fprint(2, "no hdr/dynamic %p\n", hdr);
 71 e8a7b969 2004-12-27 devnull 		return 0;
 72 e8a7b969 2004-12-27 devnull 	}
 73 e8a7b969 2004-12-27 devnull 	addr += hdr->base;
 74 e8a7b969 2004-12-27 devnull 
 75 e8a7b969 2004-12-27 devnull 	while(addr != 0){
 76 e8a7b969 2004-12-27 devnull 		if(get4(cormap, addr, &u) < 0)
 77 e8a7b969 2004-12-27 devnull 			return 0;
 78 e8a7b969 2004-12-27 devnull 		if(u == x){
 79 e8a7b969 2004-12-27 devnull 			if(get4(cormap, addr+4, &u) < 0)
 80 e8a7b969 2004-12-27 devnull 				return 0;
 81 e8a7b969 2004-12-27 devnull 			return u;
 82 e8a7b969 2004-12-27 devnull 		}
 83 e8a7b969 2004-12-27 devnull 		addr += 8;
 84 e8a7b969 2004-12-27 devnull 	}
 85 e8a7b969 2004-12-27 devnull 	return 0;
 86 e8a7b969 2004-12-27 devnull }
 87 e8a7b969 2004-12-27 devnull 
 88 e8a7b969 2004-12-27 devnull void
 89 dd944ec7 2005-01-23 devnull elfdl386mapdl(int verbose)
 90 e8a7b969 2004-12-27 devnull {
 91 e8a7b969 2004-12-27 devnull 	int i;
 92 e8a7b969 2004-12-27 devnull 	Fhdr *hdr;
 93 e8a7b969 2004-12-27 devnull 	u32int linkdebug, linkmap, name, addr;
 94 e8a7b969 2004-12-27 devnull 	char buf[1024];
 95 e8a7b969 2004-12-27 devnull 
 96 e8a7b969 2004-12-27 devnull 	if((linkdebug = dyninfo(symhdr, DT_DEBUG)) == 0){
 97 e8a7b969 2004-12-27 devnull 		fprint(2, "no dt_debug section\n");
 98 e8a7b969 2004-12-27 devnull 		return;
 99 e8a7b969 2004-12-27 devnull 	}
100 e8a7b969 2004-12-27 devnull 	if(get4(cormap, linkdebug+4, &linkmap) < 0){
101 e8a7b969 2004-12-27 devnull 		fprint(2, "get4 linkdebug+4 (0x%lux) failed\n", linkdebug);
102 e8a7b969 2004-12-27 devnull 		return;
103 e8a7b969 2004-12-27 devnull 	}
104 e8a7b969 2004-12-27 devnull 
105 e8a7b969 2004-12-27 devnull 	for(i=0; i<100 && linkmap != 0; i++){
106 e8a7b969 2004-12-27 devnull 		if(get4(cormap, linkmap, &addr) < 0
107 e8a7b969 2004-12-27 devnull 		|| get4(cormap, linkmap+4, &name) < 0
108 e8a7b969 2004-12-27 devnull 		|| get4(cormap, linkmap+12, &linkmap) < 0)
109 e8a7b969 2004-12-27 devnull 			break;
110 e8a7b969 2004-12-27 devnull 
111 dd944ec7 2005-01-23 devnull 		if(name == 0 || getstr(cormap, name, buf, sizeof buf) < 0 || buf[0] == 0)
112 dd944ec7 2005-01-23 devnull 			continue;
113 dd944ec7 2005-01-23 devnull 		if((hdr = crackhdr(buf, OREAD)) == nil){
114 dd944ec7 2005-01-23 devnull 			fprint(2, "crackhdr %s: %r\n", buf);
115 dd944ec7 2005-01-23 devnull 			continue;
116 dd944ec7 2005-01-23 devnull 		}
117 dd944ec7 2005-01-23 devnull 		hdr->base = addr;
118 dd944ec7 2005-01-23 devnull 		if(verbose)
119 dd944ec7 2005-01-23 devnull 			fprint(2, "%s: %s %s %s\n", buf, hdr->aname, hdr->mname, hdr->fname);
120 dd944ec7 2005-01-23 devnull 		if(mapfile(hdr, addr, symmap, nil) < 0)
121 dd944ec7 2005-01-23 devnull 			fprint(2, "mapping %s: %r\n", buf);
122 dd944ec7 2005-01-23 devnull 		if(corhdr){
123 dd944ec7 2005-01-23 devnull 			/*
124 dd944ec7 2005-01-23 devnull 			 * Need to map the text file under the core file.
125 dd944ec7 2005-01-23 devnull 			 */
126 dd944ec7 2005-01-23 devnull 			unmapfile(corhdr, cormap);
127 dd944ec7 2005-01-23 devnull 			mapfile(hdr, addr, cormap, nil);
128 dd944ec7 2005-01-23 devnull 			mapfile(corhdr, 0, cormap, nil);
129 dd944ec7 2005-01-23 devnull 		}
130 dd944ec7 2005-01-23 devnull 		if(symopen(hdr) < 0)
131 dd944ec7 2005-01-23 devnull 			fprint(2, "syminit %s: %r\n", buf);
132 e8a7b969 2004-12-27 devnull 	}
133 e8a7b969 2004-12-27 devnull }