Import Dev86src-0.0.8.tar.gzv0.0.8

1 files changed, 84 insertions, 0 deletions

diff --git a/ld/linksyms.c b/ld/linksyms.c
new file mode 100644
index 0000000..b5304a3
--- /dev/null
+++ b/ld/linksyms.c
@@ -0,0 +1,84 @@
+
+/* 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("_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);
+}
+