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-rw-r--r--elf/do-rel.h68
1 files changed, 68 insertions, 0 deletions
diff --git a/elf/do-rel.h b/elf/do-rel.h
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+++ b/elf/do-rel.h
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+/* Do relocations for ELF dynamic linking.
+Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+/* This file may be included twice, to define both
+   `elf_dynamic_do_rel' and `elf_dynamic_do_rela'.  */
+
+#ifdef DO_RELA
+#define elf_dynamic_do_rel	elf_dynamic_do_rela
+#define	Elf32_Rel		Elf32_Rela
+#define elf_machine_rel		elf_machine_rela
+#endif
+
+
+/* Perform the relocations in MAP on the running program image as specified
+   by RELTAG, SZTAG.  *RESOLVE is called to resolve symbol values; it
+   modifies its argument pointer to point to the defining symbol, and
+   returns the base load address of the defining object.  */
+
+static inline void
+elf_dynamic_do_rel (struct link_map *map,
+		    int reltag, int sztag, 
+		    Elf32_Addr (*resolve) (const Elf32_Sym **))
+{
+  const Elf32_Sym *const symtab
+    = (const Elf32_Sym *) map->l_info[DT_SYMTAB]->d_un.d_ptr;
+  const Elf32_Rel *r = (const Elf32_Rel *) map->l_info[reltag]->d_un.d_ptr;
+  const Elf32_Rel *end = &r[map->l_info[sztag]->d_un.d_val / sizeof *r];
+
+  for (; r < end; ++r)
+    {
+      const Elf32_Sym *definer = &symtab[ELF32_R_SYM (r->r_info)];
+      Elf32_Addr loadbase;
+
+      if (ELF32_R_SYM (r->r_info) == STN_UNDEF)
+	loadbase = 0;		/* This value will not be consulted.  */
+      else
+	{
+	  if (resolve)
+	    loadbase = (*resolve) (&definer);
+	  else
+	    {
+	      assert (definer->st_shndx != SHN_UNDEF);
+	      loadbase = map->l_addr;
+	    }
+	}
+      elf_machine_rel (map, r, loadbase, definer);
+    }
+}
+
+#undef elf_dynamic_do_rel
+#undef Elf32_Rel
+#undef elf_machine_rel