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#include <u.h>
#include <libc.h>
#include <mach.h>
#include "stabs.h"
/*
http://sources.redhat.com/gdb/onlinedocs/stabs.html
*/
int
stabsym(Stab *stabs, int i, StabSym *sym)
{
uchar *p;
ulong x;
if(stabs == nil){
werrstr("no stabs");
return -1;
}
if(stabs->e2==0 || stabs->e4==0){
werrstr("no data extractors");
return -1;
}
if(i >= stabs->stabsize/12){
werrstr("stabs index out of range");
return -1;
}
p = stabs->stabbase+i*12;
x = stabs->e4(p);
if(x == 0)
sym->name = nil;
else if(x < stabs->strsize)
sym->name = stabs->strbase+x;
else{
werrstr("bad stabs string index");
return -1;
}
/*
* In theory, if name ends with a backslash,
* it continues into the next entry. We could
* rewrite these in place and then zero the next
* few entries, but let's wait until we run across
* some system that generates these.
*/
sym->type = p[4];
sym->other = p[5];
sym->desc = stabs->e2(p+6);
sym->value = stabs->e4(p+8);
return 0;
}
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