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#include <u.h>
#include <libc.h>
#include <mach.h>
#include "elf.h"
static int
elfsyminit(Fhdr *fp)
{
int i, onlyundef;
Elf *elf;
Symbol sym;
ElfSym esym;
ElfProg *p;
elf = fp->elf;
onlyundef = fp->nsym > 0;
for(i=0; elfsym(elf, i, &esym) >= 0; i++){
if(esym.name == nil)
continue;
if(onlyundef && esym.shndx != ElfSymShnNone)
continue;
if(esym.type != ElfSymTypeObject && esym.type != ElfSymTypeFunc)
continue;
if(strchr(esym.name, '@'))
continue;
memset(&sym, 0, sizeof sym);
sym.name = esym.name;
sym.loc.type = LADDR;
sym.loc.addr = esym.value;
if(esym.size){
sym.hiloc.type = LADDR;
sym.hiloc.addr = esym.value+esym.size;
}
sym.fhdr = fp;
if(esym.type==ElfSymTypeObject){
sym.class = CDATA;
sym.type = 'D';
if(&elf->sect[esym.shndx] == elf->bss)
sym.type = 'B';
}else if(esym.type==ElfSymTypeFunc){
sym.class = CTEXT;
sym.type = 'T';
}
if(esym.shndx == ElfSymShnNone)
sym.type = 'U';
if(esym.bind==ElfSymBindLocal)
sym.type += 'a' - 'A';
_addsym(fp, &sym);
}
for(i=0; i<elf->nprog; i++){
p = &elf->prog[i];
if(p->type != ElfProgDynamic)
continue;
elf->dynamic = p->vaddr;
memset(&sym, 0, sizeof sym);
sym.name = "_DYNAMIC";
sym.loc = locaddr(p->vaddr);
sym.hiloc = locaddr(p->vaddr+p->filesz);
sym.type = 'D';
sym.class = CDATA;
_addsym(fp, &sym);
}
return 0;
}
int
elfsymlookup(Elf *elf, char *name, ulong *addr)
{
int i;
ElfSym esym;
for(i=0; elfsym(elf, i, &esym) >= 0; i++){
if(esym.name == nil)
continue;
if(strcmp(esym.name, name) == 0){
*addr = esym.value;
return 0;
}
}
return -1;
}
int
symelf(Fhdr *fhdr)
{
int ret;
ret = -1;
/* try dwarf */
if(fhdr->dwarf){
if(machdebug)
fprint(2, "dwarf symbols...\n");
if(symdwarf(fhdr) < 0)
fprint(2, "initializing dwarf: %r");
else
ret = 0;
}
/* try stabs */
if(fhdr->stabs.stabbase){
if(machdebug)
fprint(2, "stabs symbols...\n");
if(symstabs(fhdr) < 0)
fprint(2, "initializing stabs: %r");
else
ret = 0;
}
if(machdebug)
fprint(2, "elf symbols...\n");
if(elfsyminit(fhdr) < 0)
fprint(2, "initializing elf: %r");
else
ret = 0;
return ret;
}
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