Changes in rtld.c

2a3873b3 - MFC r347151,347181,347968,348421,348698,348701:

Wed, 12 Jun 2019 11:48:04 +0000

MFC r347151,347181,347968,348421,348698,348701:Switch to use shared vnode locks for text files during image activation.For MFC, VOP_GET_WRITECOUNT was left in the slot for KBI stability, but itis unused. List of files: /freebsd-12.1/libexec/rtld-elf/rtld.c

ca80d1f4 - MFC r346225:

Mon, 22 Apr 2019 10:01:20 +0000

MFC r346225:Fix order of destructors between main binary and libraries. List of files: /freebsd-12.1/libexec/rtld-elf/rtld.c

6bd1b82e - MFC r345703:

Fri, 12 Apr 2019 15:12:08 +0000

MFC r345703:Fix initial exec TLS mode for dynamically loaded shared objects. List of files: /freebsd-12.1/libexec/rtld-elf/rtld.c

75114429 - MFC r345620:

Sat, 30 Mar 2019 10:04:42 +0000

MFC r345620:rtld: disable relro enforcement for irelative relocation processing. List of files: /freebsd-12.1/libexec/rtld-elf/rtld.c

adbc4082 - MFC r339877-r339879,r343564-r343566,r343580,r343754:

Mon, 11 Feb 2019 15:02:02 +0000

MFC r339877-r339879,r343564-r343566,r343580,r343754:Untangle jemalloc and mutexes initialization.The merge includes required warnings cleanup by arichardson, both toavoid conflicts and to make rtld_malloc.c compilable with the libthrWARNS settings. List of files: /freebsd-12.1/libexec/rtld-elf/rtld.c

ed63bb9d - MFC r343484:

Sun, 03 Feb 2019 00:39:35 +0000

MFC r343484:Remove now redundand ifunc relocation code which should have beenremoved as part of r341441. List of files: /freebsd-12.1/libexec/rtld-elf/rtld.c

b6795683 - MFC r342113:

Mon, 07 Jan 2019 11:03:08 +0000

MFC r342113: Improve R_AARCH64_TLSDESC relocation. The original code did not support dynamically loaded libraries and used suboptimal access to TLS variables. New implementation removes lazy resolving of TLS relocation - due to flaw in TLSDESC design is impossible to switch resolver function at runtime without expensive locking. List of files: /freebsd-12.1/libexec/rtld-elf/rtld.c

a2093b45 - MFC r341439:

Mon, 10 Dec 2018 00:56:07 +0000

MFC r341439:Provide naive but self-contained implementations of memset(3) andbzero(3) for rtld. List of files: /freebsd-12.1/libexec/rtld-elf/rtld.c

e60db3bf - MFC r341441:

Mon, 10 Dec 2018 00:54:18 +0000

MFC r341441:Some fixes for LD_BIND_NOW + ifuncs. List of files: /freebsd-12.1/libexec/rtld-elf/rtld.c

fcc9b1b6 - MFC r340858:

Fri, 07 Dec 2018 14:25:46 +0000

MFC r340858:rtld: parse FreeBSD Feature Control note on the object load. List of files: /freebsd-12.1/libexec/rtld-elf/rtld.c

9d196240 - MFC r340675:

Tue, 27 Nov 2018 13:06:54 +0000

MFC r340675:rtld: when immediate bind mode is requested, process irelocs in PLTimmediately after other PLT relocs. List of files: /freebsd-12.1/libexec/rtld-elf/rtld.c

6b05d8ea - MFC r339896:

Wed, 07 Nov 2018 18:07:29 +0000

MFC r339896:Initialize ifunc calling machinery earlier.Approved by: re (gjb) List of files: /freebsd-12.1/libexec/rtld-elf/rtld.c

6b7a2785 - MFC r340137: rtld: move relro enforcement after ifunc processing

Wed, 07 Nov 2018 18:04:19 +0000

MFC r340137: rtld: move relro enforcement after ifunc processingPreviously the combination of relro (implicit), -z now and ifunc useresulted in a segfault when applying ifuncs after relro (test binaryhere just calls amd64_get_fsbase()):| % env LD_DEBUG=1 libexec/rtld-elf/obj/ld-elf.so.1 a.out| ...| enforcing main obj relro| ...| resolving ifuncs| reloc_jmpslot: *0x203198 = 0x189368ea4570| zsh: bus error (core dumped) LD_DEBUG=1 obj/ld-elf.so.1 ~/a.outApproved by: re (gjb) List of files: /freebsd-12.1/libexec/rtld-elf/rtld.c

d2f2e4c0 - Provide refobj context when doing libmap substitution inside

Wed, 26 Sep 2018 21:28:14 +0000

Provide refobj context when doing libmap substitution insidesearch_library_path().This corrects the scope of libmap matches.Reported and tested by: Andreas Longwitz Sponsored by: The FreeBSD FoundationApproved by: re (gjb)MFC after: 1 week List of files: /freebsd-12.1/libexec/rtld-elf/rtld.c

17fb2856 - Rework rtld's TLS Variant I implementation to match r326794

Wed, 05 Sep 2018 23:23:16 +0000

Rework rtld's TLS Variant I implementation to match r326794The above commit fixed handling overaligned TLS segments in libc'sTLS Variant I implementation, but rtld provides its own implementationfor dynamically-linked executables which lacks these fixes. Thus,port these changes to rtld.This was previously commited as r337978 and reverted in r338149 due toexposing a bug the ARM rtld. This bug was fixed in r338317 by mmel.Submitted by: James ClarkeApproved by: re (kib)Reviewed by: kbowlingTesting by: kbowling (powerpc64), br (riscv), kevans (armv7)Obtained from: CheriBSDSponsored by: DARPA, AFRLDifferential Revision: https://reviews.freebsd.org/D16510 List of files: /freebsd-12.1/libexec/rtld-elf/rtld.c

a5207d3e - Revert r337978: Rework rtld's TLS Variant I implementation to match r326794

Tue, 21 Aug 2018 18:22:12 +0000

Revert r337978: Rework rtld's TLS Variant I implementation to match r326794Michal Meloun reports that it breaks ctype (isspace()..) relatedfunctions on armv7 so back out while we diagnose the issue.Reported by: Michal Meloun List of files: /freebsd-12.1/libexec/rtld-elf/rtld.c

9b50d816 - Rework rtld's TLS Variant I implementation to match r326794

Fri, 17 Aug 2018 16:19:47 +0000

Rework rtld's TLS Variant I implementation to match r326794The above commit fixed handling overaligned TLS segments in libc'sTLS Variant I implementation, but rtld provides its own implementationfor dynamically-linked executables which lacks these fixes. Thus,port these changes to rtld.Submitted by: James ClarkeReviewed by: kbowlingTesting byL kbowling (powerpc64), br (riscv), kevans (armv7)Obtained from: CheriBSDSponsored by: DARPA, AFRLDifferential Revision: https://reviews.freebsd.org/D16510 List of files: /freebsd-12.1/libexec/rtld-elf/rtld.c

711a4538 - Make sure the rtld(1) error messages go to stderr, not stdout.

Thu, 02 Aug 2018 07:43:28 +0000

Make sure the rtld(1) error messages go to stderr, not stdout.While here fix capitalization of a few nearby strings, add thertld's file name prefix so it's obvious where the message comefrom, and return zero when "-h" is used.Reviewed by: kibMFC after: 2 weeksSponsored by: DARPA, AFRLDifferential Revision: https://reviews.freebsd.org/D16530 List of files: /freebsd-12.1/libexec/rtld-elf/rtld.c

0725fca5 - Make rtld use libc_nossp_pic.a. Remove SSP shims.

Wed, 09 May 2018 10:30:56 +0000

Make rtld use libc_nossp_pic.a. Remove SSP shims.Submitted by: Luis PiresReviewed by: brooksDifferential revision: https://reviews.freebsd.org/D15341 List of files: /freebsd-12.1/libexec/rtld-elf/rtld.c

41fc6f68 - o Let rtld(1) set up psABI user trap handlers prior to executing the

Sat, 03 Feb 2018 23:14:11 +0000

o Let rtld(1) set up psABI user trap handlers prior to executing the objects' init functions instead of doing the setup via a constructor in libc as the init functions may already depend on these handlers to be in place. This gets us rid of: - the undefined order in which libc constructors as __guard_setup() and jemalloc_constructor() are executed WRT __sparc_utrap_setup(), - the requirement to link libc last so __sparc_utrap_setup() gets called prior to constructors in other libraries (see r122883). For static binaries, crt1.o still sets up the user trap handlers.o Move misplaced prototypes for MD functions in to the MD prototype section of rtld.h.o Sprinkle nitems(). List of files: /freebsd-12.1/libexec/rtld-elf/rtld.c