[v2,00/32] RELRO link maps

This is a repost with the vDSO bug in elf/tststatic4 fixed, and the NEWS
conflict resolved.

I also ran some experiments on unpatched master with dlopen and
multi-threaded fork, and it's already really broken.  (I posted my
simple test case to bug 30619.)  Given that, I don't think this is
something I need to address in this series.

Thanks,
Florian

Florian Weimer (32):
  support: Add <support/memprobe.h> for protection flags probing
  misc: Enable internal use of memory protection keys
  elf: Remove _dl_sysdep_open_object hook function
  elf: Eliminate second loop in find_version in dl-version.c
  elf: In rtld_setup_main_map, assume ld.so has a DYNAMIC segment
  elf: Remove version assert in check_match in elf/dl-lookup.c
  elf: Disambiguate some failures in _dl_load_cache_lookup
  elf: Eliminate alloca in open_verify
  Do not export <alloc_buffer.h> functions from libc
  elf: Make <alloc_buffer.h> usable in ld.so
  elf: Merge the three implementations of _dl_dst_substitute
  elf: Move __rtld_malloc_init_stubs call into _dl_start_final
  elf: Merge __dl_libc_freemem into __rtld_libc_freeres
  elf: Use struct link_map_private for the internal link map
  elf: Remove run-time-writable fields from struct link_map_private
  elf: Move l_tls_offset into read-write part of link map
  elf: Allocate auditor state after read-write link map
  elf: Move link map fields used by dependency sorting to writable part
  elf: Split _dl_lookup_map, _dl_map_new_object from _dl_map_object
  elf: Add l_soname accessor function for DT_SONAME values
  elf: _dl_rtld_map should not exist in static builds
  elf: Introduce GLPM accessor for the protected memory area
  elf: Bootstrap allocation for future protected memory allocator
  elf: Implement a basic protected memory allocator
  elf: Move most of the _dl_find_object data to the protected heap
  elf: Switch to a region-based protected memory allocator
  elf: Determine the caller link map in _dl_open
  elf: Add fast path to dlopen for fully-opened maps
  elf: Use _dl_find_object instead of _dl_find_dso_for_object in dlopen
  elf: Put critical _dl_find_object pointers into protected memory area
  elf: Add hash tables to speed up DT_NEEDED, dlopen lookups
  elf: Use memory protection keys for the protected memory allocator

 NEWS                                          |   4 +
 csu/libc-start.c                              |   7 +-
 csu/libc-tls.c                                |   8 +-
 debug/backtracesyms.c                         |   4 +-
 debug/backtracesymsfd.c                       |   6 +-
 dlfcn/dladdr1.c                               |   7 +-
 dlfcn/dlinfo.c                                |   4 +-
 dlfcn/tst-dlinfo-phdr.c                       |  15 +-
 elf/Makefile                                  |  25 +-
 elf/circleload1.c                             |  18 +-
 elf/dl-addr-obj.c                             |   4 +-
 elf/dl-addr.c                                 |  13 +-
 elf/dl-audit.c                                |  25 +-
 elf/dl-cache.c                                |  33 +-
 elf/dl-call-libc-early-init.c                 |   2 +-
 elf/dl-call_fini.c                            |  11 +-
 elf/dl-close.c                                | 181 ++---
 elf/dl-debug.c                                |  12 -
 elf/dl-deps.c                                 | 177 +++--
 elf/dl-diagnostics.c                          |   2 +
 elf/dl-find_object.c                          | 167 ++---
 elf/dl-find_object.h                          |  21 +-
 elf/dl-fini.c                                 |  16 +-
 elf/dl-fptr.c                                 |   6 +-
 elf/dl-init.c                                 |  22 +-
 elf/dl-iteratephdr.c                          |  11 +-
 elf/dl-libc.c                                 | 115 +--
 elf/dl-libc_freeres.c                         |  94 ++-
 elf/dl-libname.c                              | 281 ++++++++
 elf/dl-libname.h                              | 121 ++++
 elf/dl-load.c                                 | 499 ++++++-------
 elf/dl-load.h                                 |  10 +-
 elf/dl-lookup-direct.c                        |   5 +-
 elf/dl-lookup.c                               | 150 ++--
 elf/dl-machine-reject-phdr.h                  |   4 +-
 elf/dl-map-segments.h                         |  16 +-
 elf/dl-minimal.c                              |   4 +-
 elf/dl-misc.c                                 |  20 -
 elf/dl-object.c                               | 181 +++--
 elf/dl-open.c                                 | 225 +++---
 elf/dl-profile.c                              |   4 +-
 elf/dl-protmem-internal.h                     | 100 +++
 elf/dl-protmem.c                              | 679 ++++++++++++++++++
 elf/dl-protmem.h                              | 102 +++
 elf/dl-protmem_bootstrap.h                    |  36 +
 elf/dl-reloc-static-pie.c                     |   7 +-
 elf/dl-reloc.c                                |  46 +-
 elf/dl-runtime.c                              |   6 +-
 elf/dl-setup_hash.c                           |   2 +-
 elf/dl-sort-maps.c                            |  53 +-
 elf/dl-static-tls.h                           |  10 +-
 elf/dl-support.c                              |  46 +-
 elf/dl-sym-post.h                             |   6 +-
 elf/dl-sym.c                                  |  10 +-
 elf/dl-symaddr.c                              |   2 +-
 elf/dl-sysdep-open.h                          |  45 --
 elf/dl-tls.c                                  |  61 +-
 elf/dl-tunables.list                          |   6 +
 elf/dl-unmap-segments.h                       |   2 +-
 elf/dl-usage.c                                |   2 +-
 elf/dl-version.c                              |  77 +-
 elf/do-rel.h                                  |  19 +-
 elf/dynamic-link.h                            |  14 +-
 elf/get-dynamic-info.h                        |  12 +-
 elf/libc-early-init.h                         |   6 +-
 elf/loadtest.c                                |  34 +-
 elf/neededtest.c                              |  18 +-
 elf/neededtest2.c                             |  18 +-
 elf/neededtest3.c                             |  18 +-
 elf/neededtest4.c                             |  18 +-
 elf/pldd-xx.c                                 |  19 +-
 elf/pldd.c                                    |   1 +
 elf/rtld.c                                    | 455 ++++++------
 elf/rtld_static_init.c                        |   2 +-
 elf/setup-vdso.h                              |  48 +-
 elf/sotruss-lib.c                             |   5 +-
 elf/sprof.c                                   |  27 +-
 elf/tlsdeschtab.h                             |   4 +-
 elf/tst-_dl_addr_inside_object.c              |  13 +-
 elf/tst-audit19a.c                            |   2 +-
 elf/tst-dl-protmem.c                          | 364 ++++++++++
 elf/tst-dl_find_object-threads.c              |   6 +-
 elf/tst-dl_find_object.c                      |  19 +-
 elf/tst-relro-linkmap-disabled-mod1.c         |  46 ++
 elf/tst-relro-linkmap-disabled-mod2.c         |   2 +
 elf/tst-relro-linkmap-disabled.c              |  64 ++
 elf/tst-relro-linkmap-mod1.c                  |  42 ++
 elf/tst-relro-linkmap-mod2.c                  |   2 +
 elf/tst-relro-linkmap-mod3.c                  |   2 +
 elf/tst-relro-linkmap.c                       | 112 +++
 elf/tst-rtld-list-tunables.exp                |   1 +
 elf/tst-rtld-nomem.c                          | 177 +++++
 elf/tst-tls6.c                                |   8 +-
 elf/tst-tls7.c                                |   8 +-
 elf/tst-tls8.c                                |  24 +-
 elf/unload.c                                  |  10 +-
 elf/unload2.c                                 |  10 +-
 htl/pt-alloc.c                                |   7 +-
 include/alloc_buffer.h                        |  26 +-
 include/dlfcn.h                               |   6 +-
 include/link.h                                | 178 +++--
 include/rtld-malloc.h                         |   5 +-
 include/set-freeres.h                         |   1 -
 libio/vtables.c                               |   2 +-
 malloc/Makefile                               |   6 +-
 malloc/Versions                               |   7 -
 malloc/alloc_buffer_alloc_array.c             |   1 -
 malloc/alloc_buffer_allocate.c                |   1 -
 malloc/alloc_buffer_copy_bytes.c              |   1 -
 malloc/alloc_buffer_copy_string.c             |   1 -
 malloc/alloc_buffer_create_failure.c          |   7 +-
 malloc/set-freeres.c                          |   2 -
 malloc/tst-alloc_buffer.c                     |   4 +
 manual/tunables.texi                          |  29 +
 nptl/Versions                                 |   3 +-
 nptl/pthread_create.c                         |   8 +
 nptl_db/db_info.c                             |   3 +-
 nptl_db/structs.def                           |   3 +-
 nptl_db/td_thr_tlsbase.c                      |  12 +-
 nss/Makefile                                  |   4 +-
 stdlib/cxa_thread_atexit_impl.c               |  10 +-
 stdlib/tst-tls-atexit.c                       |  10 +-
 support/Makefile                              |   3 +
 support/memprobe.h                            |  43 ++
 support/support-alloc_buffer.c                |  26 +
 support/support_memprobe.c                    | 251 +++++++
 support/tst-support_memprobe.c                | 118 +++
 sysdeps/aarch64/dl-bti.c                      |  14 +-
 sysdeps/aarch64/dl-lookupcfg.h                |   4 +-
 sysdeps/aarch64/dl-machine.h                  |  29 +-
 sysdeps/aarch64/dl-prop.h                     |  12 +-
 sysdeps/aarch64/dl-tlsdesc.h                  |   2 +-
 sysdeps/aarch64/tlsdesc.c                     |   2 +-
 sysdeps/alpha/dl-machine.h                    |  24 +-
 sysdeps/arc/dl-machine.h                      |  21 +-
 sysdeps/arm/dl-lookupcfg.h                    |   4 +-
 sysdeps/arm/dl-machine.h                      |  43 +-
 sysdeps/arm/dl-tlsdesc.h                      |   2 +-
 sysdeps/arm/tlsdesc.c                         |   2 +-
 sysdeps/csky/dl-machine.h                     |  22 +-
 sysdeps/generic/dl-debug.h                    |   2 +-
 sysdeps/generic/dl-early_mmap.h               |  35 +
 sysdeps/generic/dl-fptr.h                     |   4 +-
 sysdeps/generic/dl-prop.h                     |   8 +-
 sysdeps/generic/dl-protected.h                |  10 +-
 sysdeps/generic/dl-protmem-pkey.h             |  20 +
 sysdeps/generic/ldsodefs.h                    | 277 ++++---
 sysdeps/generic/rtld_static_init.h            |   3 +-
 sysdeps/hppa/dl-fptr.c                        |  10 +-
 sysdeps/hppa/dl-lookupcfg.h                   |   6 +-
 sysdeps/hppa/dl-machine.h                     |  29 +-
 sysdeps/hppa/dl-runtime.c                     |   4 +-
 sysdeps/hppa/dl-runtime.h                     |   2 +-
 sysdeps/hppa/dl-symaddr.c                     |   2 +-
 sysdeps/htl/pthreadP.h                        |   2 +-
 sysdeps/i386/dl-machine.h                     |  41 +-
 sysdeps/i386/dl-tlsdesc.h                     |   2 +-
 sysdeps/i386/tlsdesc.c                        |   2 +-
 sysdeps/ia64/dl-lookupcfg.h                   |   6 +-
 sysdeps/ia64/dl-machine.h                     |  29 +-
 sysdeps/loongarch/dl-machine.h                |  19 +-
 sysdeps/loongarch/dl-tls.h                    |   2 +-
 sysdeps/m68k/dl-machine.h                     |  20 +-
 sysdeps/m68k/dl-tls.h                         |   2 +-
 sysdeps/microblaze/dl-machine.h               |  23 +-
 sysdeps/mips/Makefile                         |   6 +
 sysdeps/mips/dl-debug.h                       |   2 +-
 sysdeps/mips/dl-machine-reject-phdr.h         |  20 +-
 sysdeps/mips/dl-machine.h                     |  74 +-
 sysdeps/mips/dl-tls.h                         |   2 +-
 sysdeps/mips/dl-trampoline.c                  |  19 +-
 sysdeps/nios2/dl-init.c                       |   6 +-
 sysdeps/nios2/dl-machine.h                    |  19 +-
 sysdeps/nios2/dl-tls.h                        |   2 +-
 sysdeps/nptl/dl-mutex.c                       |   2 +-
 sysdeps/or1k/dl-machine.h                     |  20 +-
 sysdeps/powerpc/dl-tls.h                      |   2 +-
 sysdeps/powerpc/powerpc32/dl-machine.c        |  19 +-
 sysdeps/powerpc/powerpc32/dl-machine.h        |  40 +-
 sysdeps/powerpc/powerpc64/dl-machine.c        |   8 +-
 sysdeps/powerpc/powerpc64/dl-machine.h        |  48 +-
 sysdeps/riscv/dl-machine.h                    |  26 +-
 sysdeps/riscv/dl-tls.h                        |   2 +-
 sysdeps/s390/s390-32/dl-machine.h             |  29 +-
 sysdeps/s390/s390-64/dl-machine.h             |  29 +-
 sysdeps/sh/dl-machine.h                       |  36 +-
 sysdeps/sparc/sparc32/dl-machine.h            |  24 +-
 sysdeps/sparc/sparc64/dl-irel.h               |   2 +-
 sysdeps/sparc/sparc64/dl-machine.h            |  27 +-
 sysdeps/sparc/sparc64/dl-plt.h                |   4 +-
 sysdeps/unix/sysv/linux/dl-early_allocate.c   |  17 +-
 sysdeps/unix/sysv/linux/dl-early_mmap.h       |  41 ++
 sysdeps/unix/sysv/linux/dl-origin.c           |   1 -
 sysdeps/unix/sysv/linux/dl-protmem-pkey.h     |  23 +
 sysdeps/unix/sysv/linux/dl-sysdep.c           |   2 +
 sysdeps/unix/sysv/linux/dl-vdso.h             |   2 +-
 .../sysv/linux/include/bits/mman-shared.h     |  16 +
 sysdeps/unix/sysv/linux/pkey_get.c            |   5 +-
 sysdeps/unix/sysv/linux/pkey_mprotect.c       |   4 +-
 sysdeps/unix/sysv/linux/pkey_set.c            |   5 +-
 sysdeps/unix/sysv/linux/powerpc/libc-start.c  |   2 +-
 .../sysv/linux/powerpc/powerpc64/ldsodefs.h   |  14 +-
 .../sysv/linux/powerpc/powerpc64/pkey_get.c   |   4 +-
 .../sysv/linux/powerpc/powerpc64/pkey_set.c   |   4 +-
 .../sysv/linux/powerpc/rtld_static_init.h     |   3 +-
 sysdeps/unix/sysv/linux/syscalls.list         |   4 +-
 sysdeps/unix/sysv/linux/x86/dl-protmem-pkey.h |  26 +
 sysdeps/unix/sysv/linux/x86/pkey_get.c        |   5 +-
 sysdeps/unix/sysv/linux/x86/pkey_set.c        |   5 +-
 sysdeps/x86/dl-cet.c                          |   4 +-
 sysdeps/x86/dl-lookupcfg.h                    |   4 +-
 sysdeps/x86/dl-prop.h                         |  29 +-
 sysdeps/x86_64/dl-machine.h                   |  39 +-
 sysdeps/x86_64/dl-tlsdesc.h                   |   2 +-
 sysdeps/x86_64/tlsdesc.c                      |   2 +-
 215 files changed, 5265 insertions(+), 2443 deletions(-)
 create mode 100644 elf/dl-libname.c
 create mode 100644 elf/dl-libname.h
 create mode 100644 elf/dl-protmem-internal.h
 create mode 100644 elf/dl-protmem.c
 create mode 100644 elf/dl-protmem.h
 create mode 100644 elf/dl-protmem_bootstrap.h
 delete mode 100644 elf/dl-sysdep-open.h
 create mode 100644 elf/tst-dl-protmem.c
 create mode 100644 elf/tst-relro-linkmap-disabled-mod1.c
 create mode 100644 elf/tst-relro-linkmap-disabled-mod2.c
 create mode 100644 elf/tst-relro-linkmap-disabled.c
 create mode 100644 elf/tst-relro-linkmap-mod1.c
 create mode 100644 elf/tst-relro-linkmap-mod2.c
 create mode 100644 elf/tst-relro-linkmap-mod3.c
 create mode 100644 elf/tst-relro-linkmap.c
 create mode 100644 elf/tst-rtld-nomem.c
 create mode 100644 support/memprobe.h
 create mode 100644 support/support-alloc_buffer.c
 create mode 100644 support/support_memprobe.c
 create mode 100644 support/tst-support_memprobe.c
 create mode 100644 sysdeps/generic/dl-early_mmap.h
 create mode 100644 sysdeps/generic/dl-protmem-pkey.h
 create mode 100644 sysdeps/unix/sysv/linux/dl-early_mmap.h
 create mode 100644 sysdeps/unix/sysv/linux/dl-protmem-pkey.h
 create mode 100644 sysdeps/unix/sysv/linux/include/bits/mman-shared.h
 create mode 100644 sysdeps/unix/sysv/linux/x86/dl-protmem-pkey.h


base-commit: 1bcfe0f732066ae5336b252295591ebe7e51c301