xref: /src/libexec/ld.elf_so/arch/vax/mdreloc.c

#include <sys/types.h>
#include <sys/stat.h>

#include "debug.h"
#include "rtld.h"

void
_rtld_setup_pltgot(const Obj_Entry *obj)
{
	obj->pltgot[1] = (Elf_Addr) obj;
	obj->pltgot[2] = (Elf_Addr) &_rtld_bind_start;
}

int
_rtld_relocate_nonplt_objects(obj, dodebug)
	Obj_Entry *obj;
	bool dodebug;
{
	const Elf_Rela *rela;

	for (rela = obj->rela; rela < obj->relalim; rela++) {
		Elf_Addr        *where;
		const Elf_Sym   *def;
		const Obj_Entry *defobj;
		Elf_Addr         tmp;
		unsigned long	 symnum;

		where = (Elf_Addr *)(obj->relocbase + rela->r_offset);
		symnum = ELF_R_SYM(rela->r_info);

		switch (ELF_R_TYPE(rela->r_info)) {
		case R_TYPE(NONE):
			break;

		case R_TYPE(32):	/* word32 S + A */
		case R_TYPE(GLOB_DAT):	/* word32 S + A */
			def = _rtld_find_symdef(symnum, obj, &defobj, false);
			if (def == NULL)
				return -1;

			tmp = (Elf_Addr)(defobj->relocbase + def->st_value +
			    rela->r_addend);

			if (*where != tmp)
				*where = tmp;
			rdbg(dodebug, ("32/GLOB_DAT %s in %s --> %p in %s",
			    defobj->strtab + def->st_name, obj->path,
			    (void *)*where, defobj->path));
			break;

		case R_TYPE(RELATIVE):	/* word32 B + A */
			tmp = (Elf_Addr)(obj->relocbase + rela->r_addend);
			if (*where != tmp)
				*where = tmp;
			rdbg(dodebug, ("RELATIVE in %s --> %p", obj->path,
			    (void *)*where));
			break;

		case R_TYPE(COPY):
			/*
			 * These are deferred until all other relocations have
			 * been done.  All we do here is make sure that the
			 * COPY relocation is not in a shared library.  They
			 * are allowed only in executable files.
			 */
			if (!obj->mainprog) {
				_rtld_error(
			"%s: Unexpected R_COPY relocation in shared library",
				    obj->path);
				return -1;
			}
			rdbg(dodebug, ("COPY (avoid in main)"));
			break;

		default:
			rdbg(dodebug, ("sym = %lu, type = %lu, offset = %p, "
			    "addend = %p, contents = %p, symbol = %s",
			    symnum, (u_long)ELF_R_TYPE(rela->r_info),
			    (void *)rela->r_offset, (void *)rela->r_addend,
			    (void *)*where,
			    obj->strtab + obj->symtab[symnum].st_name));
			_rtld_error("%s: Unsupported relocation type %ld "
			    "in non-PLT relocations\n",
			    obj->path, (u_long) ELF_R_TYPE(rela->r_info));
			return -1;
		}
	}
	return 0;
}