WadObjectFile *
wad_object_load(const char *path) {
WadObjectFile *wo;
WadFile *wf;
WadObjectFile *wad_arobject_load(const char *path, const char *name);
if (wad_debug_mode & DEBUG_OBJECT) {
wad_printf("wad: Loading object '%s'", path);
}
for (wo = wad_objects; wo; wo=wo->next) {
if (strcmp(wo->path,path) == 0) {
if (wad_debug_mode & DEBUG_OBJECT) {
wad_printf(" (cached)\n");
}
return wo;
}
}
if (wad_debug_mode & DEBUG_OBJECT) {
wad_printf("\n");
}
/* Didn't find it. Now we need to go load some files */
/* If this is an archive reference like /path/libfoo.a(blah.o), we need to
split up the name a little bit */
{
char realfile[MAX_PATH];
char *objfile;
char *c;
c = strchr(path,'(');
if (c) {
wad_strcpy(realfile,path);
c = strchr(realfile,'(');
*c = 0;
objfile = c+1;
c = strchr(objfile,')');
*c = 0;
/* Okay, I'm going to attempt to map this as a library file */
wo = wad_arobject_load(realfile,objfile);
if (wo) {
/* Reset the path */
wo->path = wad_strdup(path);
wo->next = wad_objects;
wad_objects = wo;
return wo;
}
}
}
wf = load_file(path);
if (!wf) return 0;
wo = (WadObjectFile *) wad_malloc(sizeof(WadObjectFile));
wo->path = wad_strdup(path);
wo->ptr = wf->addr;
wo->len = wf->size;
wo->next = wad_objects;
wad_objects = wo;
return wo;
}
static int
segment_read(int fd, WadSegment *s)
{
char pbuffer[1024];
char *c;
int len;
FILE *fs = (FILE *) fd;
c = fgets(pbuffer,1024,fs);
if (!c) return 0;
pbuffer[strlen(pbuffer)-1] = 0; /* Chop off endline */
/* Break up the field into records */
/* 0-8 : Starting address
9-17 : Ending Address
18 : r
19 : w
20 : x
21 : p
23-31 : Offset
49- : Filename */
len = strlen(pbuffer);
pbuffer[8] = 0;
pbuffer[17] = 0;
pbuffer[31] = 0;
if (len >= 49) {
s->mapname = wad_strdup(pbuffer+49);
s->mappath = s->mapname;
} else {
s->mapname = "";
s->mappath = s->mapname;
}
if (linux_first) {
wad_strcpy(linux_firstsegment, s->mappath);
linux_first = 0;
}
s->vaddr = (char *) strtoul(pbuffer,NULL,16);
s->size = strtoul(pbuffer+9,NULL,16) - (long) (s->vaddr);
s->offset = strtoul(pbuffer+23,NULL,16);
if (strcmp(linux_firstsegment, s->mappath) == 0) {
s->base = 0;
} else {
s->base = s->vaddr;
}
s++;
return 1;
}
static void
stab_symbol(Stab *s, char *stabstr) {
char *str;
char *pstr;
char name[1024];
char value[65536];
str = stabstr+s->n_strx;
pstr = stab_string_parm(str);
if (!pstr) return;
strncpy(name,str, pstr-str);
name[(int)(pstr-str)] = 0;
if ((pstr[1] == 't') || (pstr[1] == 'p') || (pstr[1] == 'r')) {
/* A stabs type definition */
/* printf("stab lsym: other=%d, desc=%d, value=%d, str='%s'\n", s->n_other,s->n_desc,s->n_value,
stabstr+s->n_strx); */
/* wad_printf("name = '%s', pstr='%s'\n", name, pstr+2); */
wad_strcpy(value,pstr+2);
type_add(name,value);
}
}
static int
segment_read(int fs, WadSegment *s) {
int dz;
int n;
prmap_t pmap;
n = read(fs, &pmap, sizeof(prmap_t));
if (n <= 0) return 0;
s->mapname = wad_strdup(pmap.pr_mapname);
s->mappath = (char *) wad_malloc(20+strlen(pmap.pr_mapname));
wad_strcpy(s->mappath,"/proc/self/object/");
strcat(s->mappath,pmap.pr_mapname);
s->vaddr = (char *) pmap.pr_vaddr;
/* This is a solaris oddity. a.out section starts 1 page up, but
symbols are relative to a base of 0 */
if (strcmp(s->mapname,"a.out") == 0) s->base = 0;
else s->base = s->vaddr;
s->size = pmap.pr_size;
s->offset = pmap.pr_offset;
return 1;
}
int
wad_search_stab(void *sp, int size, char *stabstr, WadFrame *f) {
Stab *s;
int ns;
int i;
int found = 0;
char *file, *lastfile = 0;
char srcfile[MAX_PATH];
char objfile[MAX_PATH];
/* It appears to be necessary to clear the types table on each new stabs section */
init_hash();
if (!f->sym_name) return 0;
s = (Stab *) sp; /* Stabs data */
ns = size/sizeof(Stab); /* number of stabs */
srcfile[0] = 0;
objfile[0] = 0;
for (i = 0; i < ns; i++, s++) {
if (wad_debug_mode & DEBUG_STABS) {
/* wad_printf(" %10d %10x %10d %10d %10d: '%s'\n", s->n_strx, s->n_type, s->n_other, s->n_desc, s->n_value,
stabstr+s->n_strx); */
}
if (s->n_type == N_LSYM) {
stab_symbol(s,stabstr);
continue;
}
if ((s->n_type == N_UNDF)) { /* && (s->n_desc >= 0)) { */
/* New stabs section. We need to be a little careful here. Do a recursive
search of the subsection. */
if (wad_search_stab(s+1,s->n_desc*sizeof(Stab), stabstr, f)) {
return 1;
}
/* On solaris, each stabs section seems to increment the stab string pointer. On Linux,
the linker seems to do a certain amount of optimization that results in a single
string table. */
#ifdef WAD_SOLARIS
stabstr += s->n_value; /* Update the string table location*/
#endif
i += s->n_desc;
s += s->n_desc;
objfile[0] = 0;
srcfile[0] = 0;
continue;
} else if (s->n_type == N_SO) {
/* Source file specification */
/* Look for directory */
file = stabstr+s->n_strx;
if (strlen(file) && (file[strlen(file)-1] == '/')) {
wad_strcpy(srcfile,file);
} else {
wad_strcat(srcfile,file);
}
objfile[0] = 0;
/* If we have a file match, we might be looking for a local symbol. If so,
we'll go ahead and set the srcfile field of the frame */
/* We're going to check for a file match. Maybe we're looking for a local symbol */
if (f->sym_file && strcmp(f->sym_file,file) == 0) {
found = 1;
}
lastfile = file;
} else if (s->n_type == N_OBJ) {
/* Object file specifier */
if (objfile[0]) {
wad_strcat(objfile,"/");
}
wad_strcat(objfile,stabstr+s->n_strx);
} else if (s->n_type == N_FUN) {
if (match_stab_symbol(f->sym_name, stabstr+s->n_strx, f->sym_nlen)) {
if (!f->sym_file || (strcmp(f->sym_file,lastfile) == 0)) {
int n;
/* Go find debugging information for the function */
n = scan_function(s+1, stabstr, ns -i - 1, f);
f->loc_srcfile = wad_string_lookup(srcfile);
f->loc_objfile = wad_string_lookup(objfile);
return 1;
}
}
}
}
/* If found, but no other debugging information was filled in, go ahead and copy the
source and objfile information */
if ((found) && (!f->debug_check)) {
f->loc_srcfile = wad_string_lookup(srcfile);
f->loc_objfile = wad_string_lookup(objfile);
}
return found;
}
int
wad_elf_debug_info(WadFrame *f) {
int nstab, nstabstr, nstabindex, nstabindexstr, nstabexcl, nstabexclstr;
int ret;
void *stab;
char *stabstr;
int stabsize;
nstab = wad_elf_section_byname(f->object,".stab");
nstabstr = wad_elf_section_byname(f->object,".stabstr");
nstabindex = wad_elf_section_byname(f->object,".stab.index");
nstabindexstr = wad_elf_section_byname(f->object,".stab.indexstr");
nstabexcl = wad_elf_section_byname(f->object,".stab.excl");
nstabexclstr = wad_elf_section_byname(f->object,".stab.exclstr");
#ifdef DEBUG_DEBUG
wad_printf("nstab = %d\n", nstab);
wad_printf("nstabstr = %d\n", nstabstr);
wad_printf("nstabindex = %d\n", nstabindex);
wad_printf("nstabindexstr = %d\n", nstabindexstr);
wad_printf("nstabexcl = %d\n", nstabexcl);
wad_printf("nstabexclstr = %d\n", nstabexclstr);
#endif
/* Now start searching stabs */
/* Look in the .stab section */
if (nstab > 0) {
stab = wad_elf_section_data(f->object,nstab);
stabsize = wad_elf_section_size(f->object,nstab);
stabstr = (char *) wad_elf_section_data(f->object,nstabstr);
if (wad_search_stab(stab,stabsize,stabstr, f)) return 1;
}
/* Look in the .stab.excl section. A solaris oddity? */
if (nstabexcl > 0) {
stab = wad_elf_section_data(f->object,nstabexcl);
stabsize = wad_elf_section_size(f->object, nstabexcl);
stabstr = (char *) wad_elf_section_data(f->object, nstabexclstr);
if (wad_search_stab(stab,stabsize,stabstr, f)) return 1;
}
/* Look in the .stab.index section. A Solaris oddity? */
if (nstabindex > 0) {
stab = wad_elf_section_data(f->object,nstabindex);
stabsize = wad_elf_section_size(f->object, nstabindex);
stabstr = (char *) wad_elf_section_data(f->object, nstabindexstr);
if (wad_search_stab(stab,stabsize,stabstr, f)) {
/* Hmmm. Might be in a different file */
WadObjectFile *wo1, *wold;
char objfile[MAX_PATH];
/* printf("DEBUG %s\n", f->sym_name); */
wad_strcpy(objfile, f->loc_objfile);
wo1 = wad_object_load(objfile);
if (wo1) {
wold = f->object;
f->object = wo1;
wad_find_debug(f);
f->object = wold;
return ret;
} else {
/* wad_printf("couldn't load %s\n", objfile); */
}
/* if (!ret) return wad_search_stab(stab,stabsize,stabstr,f);*/
return ret;
}
}
return 0;
}
WadObjectFile *
wad_arobject_load(const char *arpath, const char *robjname) {
WadObjectFile *wo;
WadFile *wf;
int arlen;
char *arptr;
struct ar_hdr *ah;
int offset;
int msize;
char *strtab = 0;
int sobjname;
char objname[MAX_PATH];
wad_strcpy(objname,robjname);
wad_strcat(objname,"/");
sobjname = strlen(objname);
wf = load_file(arpath);
if (!wf) return 0; /* Doesn't exit */
arptr = (char *) wf->addr;
arlen = wf->size;
/* Now take a look at the archive */
if (strncmp(arptr,ARMAG,SARMAG) == 0) {
/* printf("Got an archive\n"); */
} else {
return 0;
}
/* Search the archive for the request member */
strtab = 0;
offset = SARMAG;
while (offset < arlen) {
char mname[MAX_PATH];
ah = (struct ar_hdr *) (arptr + offset);
if (strncmp(ah->ar_name,"// ", 3) == 0) {
strtab = arptr + offset + sizeof(struct ar_hdr);
}
msize = atoi(ah->ar_size);
offset += sizeof(struct ar_hdr);
/* Try to figure out the filename */
if ((ah->ar_name[0] == '/') && (isdigit(ah->ar_name[1]))) {
int soff;
char *e;
/* Must be in the string offset table */
soff = atoi(ah->ar_name+1);
if (!strtab) {
/* No offset table */
return 0;
}
e = strchr(strtab+soff,'\n');
if (e) {
strncpy(mname, strtab+soff, (e - (strtab+soff)));
mname[e-(strtab+soff)] = 0;
} else {
mname[0] = 0;
}
} else {
/* Name must be in the name field */
strncpy(mname,ah->ar_name,16);
mname[16] = 0;
}
/* Compare the names */
if (strncmp(mname,objname,sobjname) == 0) {
/* Found the archive */
wo = (WadObjectFile *) wad_malloc(sizeof(WadObjectFile));
wo->ptr = (void *) (arptr + offset);
wo->len = msize;
wo->path = 0;
return wo;
}
offset += msize;
}
return 0;
}
/* Try to make a formatted version of a local */
char *wad_format_var(WadLocal *l) {
static char hexdigits[] = "0123456789abcdef";
static char buffer[1024];
double dval;
float fval;
buffer[0] = 0;
switch(l->type) {
case WAD_TYPE_INT32:
wad_strcpy(buffer,wad_format_int(l->ptr,4,1));
break;
case WAD_TYPE_UINT32:
wad_strcpy(buffer,wad_format_int(l->ptr,4,0));
break;
case WAD_TYPE_INT16:
wad_strcpy(buffer,wad_format_int(l->ptr,2,1));
break;
case WAD_TYPE_UINT16:
wad_strcpy(buffer,wad_format_int(l->ptr,2,0));
break;
case WAD_TYPE_INT8:
wad_strcpy(buffer,wad_format_int(l->ptr,1,1));
break;
case WAD_TYPE_UINT8:
wad_strcpy(buffer,wad_format_int(l->ptr,1,0));
break;
case WAD_TYPE_CHAR:
buffer[0] = '\'';
buffer[1] = *((char *) l->ptr);
buffer[2] = '\'';
buffer[3] = 0;
break;
case WAD_TYPE_FLOAT:
wad_memcpy(&fval,l->ptr,sizeof(float));
sprintf(buffer,"%g",fval);
break;
case WAD_TYPE_DOUBLE:
wad_memcpy(&dval,l->ptr,sizeof(double));
sprintf(buffer,"%g",dval);
break;
case WAD_TYPE_UNKNOWN:
case WAD_TYPE_POINTER:
default:
/* Hmmm. Unknown data type. We'll just treat it as a word */
if (l->ptr) {
int incr,i;
int b;
int leading = 1;
char *c;
char *ptr;
#ifdef WAD_LITTLE_ENDIAN
ptr = ((char *) l->ptr) + 3;
incr = -1;
#else
ptr = (char *) l->ptr;
incr =1 ;
#endif
wad_strcat(buffer,"0x");
c = buffer+2;
for (i = 0; i < sizeof(void *); i++) {
b = (int) *ptr;
if (!leading || (b)) {
if (!leading || (b & 0xf0))
*(c++) = hexdigits[(b & 0xf0) >> 4];
*(c++) = hexdigits[(b & 0xf)];
leading = 0;
}
ptr += incr;
}
if (leading)
*(c++) = '0';
*c = 0;
}
}