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/* linksyms.c - write binary file for linker */
/* Copyright (C) 1994 Bruce Evans */
#include "syshead.h"
#include "const.h"
#include "obj.h"
#include "type.h"
#undef EXTERN
#include "globvar.h"
FORWARD void linkrefs P((struct modstruct *modptr));
PUBLIC bool_t reloc_output = 0;
/* link all symbols connected to entry symbols */
PUBLIC void linksyms(argreloc_output)
bool_pt argreloc_output;
{
char needlink;
struct entrylist *elptr;
struct modstruct *modptr;
struct symstruct *symptr;
#ifdef REL_OUTPUT
reloc_output = argreloc_output;
if (argreloc_output)
{
if (modfirst->modnext != NUL_PTR)
fatalerror("relocatable output only works for one input file");
for (modptr = modfirst; modptr != NUL_PTR; modptr = modptr->modnext)
modptr->loadflag = TRUE;
return;
}
#endif
if ((symptr = findsym("_start")) != NUL_PTR ||
(symptr = findsym("_main")) != NUL_PTR)
entrysym(symptr);
do
{
if ((elptr = entryfirst) == NUL_PTR)
fatalerror("no start symbol");
for (modptr = modfirst; modptr != NUL_PTR; modptr = modptr->modnext)
modptr->loadflag = FALSE;
for (; elptr != NUL_PTR; elptr = elptr->elnext)
linkrefs(elptr->elsymptr->modptr);
if ((symptr = findsym("start")) != NUL_PTR)
linkrefs(symptr->modptr);
needlink = FALSE;
{
struct redlist *prlptr = 0;
struct redlist *rlptr;
for (rlptr = redfirst; rlptr != NUL_PTR;
rlptr = (prlptr = rlptr)->rlnext)
if (rlptr->rlmodptr->loadflag &&
rlptr->rlmodptr->class > rlptr->rlsymptr->modptr->class)
{
rlptr->rlsymptr->modptr = rlptr->rlmodptr;
rlptr->rlsymptr->value = rlptr->rlvalue;
if (rlptr == redfirst)
redfirst = rlptr->rlnext;
else
prlptr->rlnext = rlptr->rlnext;
needlink = TRUE;
}
}
}
while (needlink);
}
PRIVATE void linkrefs(modptr)
struct modstruct *modptr;
{
register struct symstruct **symparray;
register struct symstruct *symptr;
modptr->loadflag = TRUE;
for (symparray = modptr->symparray;
(symptr = *symparray) != NUL_PTR; ++symparray)
if (symptr->modptr->loadflag == FALSE)
linkrefs(symptr->modptr);
}
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