NetBSD/libexec/ld.elf_so
cgd 0b2b5475a4 nclude dlfcn.h, and pull RLTD_LAZY in from there. Assume that RTLD_NOW is
RLTD_LAZY + 1 (for now), if it's not defined.  RTLD_NOW should be defined
in dlfcn.h, since some code (e.g. X11) wants it and assumes that it has
the value currently used by our RTLD_LAZY.
1996-12-18 22:27:29 +00:00
..
alpha First cut at an ELF shared loader. Originally from John Polstra's FreeBSD elf 1996-12-16 20:37:55 +00:00
arch/alpha First cut at an ELF shared loader. Originally from John Polstra's FreeBSD elf 1996-12-16 20:37:55 +00:00
Makefile First cut at an ELF shared loader. Originally from John Polstra's FreeBSD elf 1996-12-16 20:37:55 +00:00
README First cut at an ELF shared loader. Originally from John Polstra's FreeBSD elf 1996-12-16 20:37:55 +00:00
debug.c First cut at an ELF shared loader. Originally from John Polstra's FreeBSD elf 1996-12-16 20:37:55 +00:00
debug.h First cut at an ELF shared loader. Originally from John Polstra's FreeBSD elf 1996-12-16 20:37:55 +00:00
headers.c First cut at an ELF shared loader. Originally from John Polstra's FreeBSD elf 1996-12-16 20:37:55 +00:00
link.h First cut at an ELF shared loader. Originally from John Polstra's FreeBSD elf 1996-12-16 20:37:55 +00:00
load.c First cut at an ELF shared loader. Originally from John Polstra's FreeBSD elf 1996-12-16 20:37:55 +00:00
malloc.c First cut at an ELF shared loader. Originally from John Polstra's FreeBSD elf 1996-12-16 20:37:55 +00:00
map_object.c Mipsel changes to ELF ldd/ld.so: 1996-12-17 03:42:44 +00:00
paths.c First cut at an ELF shared loader. Originally from John Polstra's FreeBSD elf 1996-12-16 20:37:55 +00:00
reloc.c First cut at an ELF shared loader. Originally from John Polstra's FreeBSD elf 1996-12-16 20:37:55 +00:00
rtld.c nclude dlfcn.h, and pull RLTD_LAZY in from there. Assume that RTLD_NOW is 1996-12-18 22:27:29 +00:00
rtld.h remove /usr/localelf/lib from default library path 1996-12-17 05:04:10 +00:00
rtldenv.h First cut at an ELF shared loader. Originally from John Polstra's FreeBSD elf 1996-12-16 20:37:55 +00:00
search.c First cut at an ELF shared loader. Originally from John Polstra's FreeBSD elf 1996-12-16 20:37:55 +00:00
symbol.c First cut at an ELF shared loader. Originally from John Polstra's FreeBSD elf 1996-12-16 20:37:55 +00:00
xmalloc.c First cut at an ELF shared loader. Originally from John Polstra's FreeBSD elf 1996-12-16 20:37:55 +00:00
xprintf.c First cut at an ELF shared loader. Originally from John Polstra's FreeBSD elf 1996-12-16 20:37:55 +00:00

README

$NetBSD: README,v 1.1 1996/12/16 20:37:56 cgd Exp $

BUGS/PROBLEMS:

* rtld.c around line 147:

	#iffdef __alpha__
	/* XXX XXX XXX */
	_rtld_objself.pltgot = NULL;
	#endif

  It's a workaround for a linker bug, and will go away when the linker is
  fixed.

* Formerly, _DYNAMIC was _GLOBAL_OFFSET_TABLE_[0], but that isn't true with
  newer snapshots of gas/binutils (at least on the Alpha), which support
  multiple GOTs.  That's what the OLD_GOT #ifdefs are about.
  
* The method used to relocate ld.so is shoddy and fragile.  Currently it's
  something like:

	(1) assembly code relocates RELATIVE relocations in the GOT
	    (on some ports, all relative relocations; this will probably
	    have to be #ifdef'd in reloc.c), assuming that everything
	    in the GOT is a RELATIVE relocation.

	(2) C code relocates the rest of the loader, excluding those
	    RELATIVE relocations already done (via an ... iffy heuristic).

  Something better (like that the glibc ELF ld.so does) should be done
  eventually, where a single set of C code is compiled twice, once for
  normal use, and once to be used to relocate the shared linker.  No
  relocations should be processed in assembly language.

* On the Alpha, this code Really needs to be checked to be sure that
  it doesn't make calls that could use FP, while doing lazy binding.


TO DO:

* Support for other platforms (e.g. mips)

* Support for coexistance of 32-bit and 64-bit ELF on platforms that can
  do that.

* KNF

* Possible support for ldd (standalone operation) and program loading
  a la the glibc shared loader.