From patchwork Tue Jul 3 10:00:17 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Florian Weimer X-Patchwork-Id: 28208 Received: (qmail 4206 invoked by alias); 3 Jul 2018 10:01:15 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Delivered-To: mailing list libc-alpha@sourceware.org Received: (qmail 3305 invoked by uid 89); 3 Jul 2018 10:00:50 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-26.9 required=5.0 tests=BAYES_00, GIT_PATCH_0, GIT_PATCH_1, GIT_PATCH_2, GIT_PATCH_3, SPF_HELO_PASS, TIME_LIMIT_EXCEEDED autolearn=unavailable version=3.3.2 spammy=auditing, locate, lay X-HELO: mx1.redhat.com Subject: Re: [PATCH] Reduce the statically linked startup code [BZ #23323] To: libc-alpha@sourceware.org References: <20180623214525.CB496402DFEF9@oldenburg.str.redhat.com> From: Florian Weimer Message-ID: <066fb49e-a289-8ac5-c6c1-dea7fd60fe7a@redhat.com> Date: Tue, 3 Jul 2018 12:00:17 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.8.0 MIME-Version: 1.0 In-Reply-To: <20180623214525.CB496402DFEF9@oldenburg.str.redhat.com> I rebased the patch onto current master. Florian Subject: [PATCH] Reduce the statically linked startup code [BZ #23323] To: libc-alpha@sourceware.org It turns out the startup code in csu/elf-unit.c has a perfect pair of ROP gadgets (see Marco-Gisbert and Ripoll-Ripoll, “return-to-csu: A New Method to Bypass 64-bit Linux ASLR”). These functions are not needed in dynamically-linked binaries because DT_INIT/DT_INIT_ARRAY are already processed by the dynamic linker. However, the dynamic linker skipped the main program for some reason. For maximum backwards compatibility, this is not changed, and instead, the main map is consulted from __libc_start_main if the init function argument is a NULL pointer. For statically linked binaries, the old approach based on linker symbols is still used because there is nothing else available. A new symbol version __libc_start_main@@GLIBC_2.28 is introduced because new binaries running on an old libc would not run their ELF constructors, leading to difficult-to-debug issues. This approach (multiple symbol versions for the same function symbol) requires a recent binutils version (later than 2.25 on some architectures) because earlier versions cannot use a symbol alias to define multiple symbol versions for the same symbol. Tested on aarch64, armhfp, i686, mips64, ppc, ppc64, ppc64el, s390, s390x, x86_64, and built with build-many-glibcs.py. This patch depends on the earlier patch which introduces ELF_INITFINI. 2018-06-23 Florian Weimer [BZ #23323] Reduce statically-linked startup code. * csu/Makefile (routines): Remove elf-init. * csu/elf-init.c: Remove file. * csu/Versions (GLIBC_2.28): Export __libc_start_main from libc. * csu/libc-start.c: Add note that this is not part of the startup code for dynamically linked applications. [SHARED] (call_init): New function, based on call_init from elf/dl-init.c. [!SHARED] (call_init, call_fini): New functions, based on csu/elf-init.c (LIBC_START_MAIN): Update function comment. Register call_fini directly for statically linked applications. Call call_init instead of init (in statically linked applications, and if it is not NULL). (DO_DEFINE_LIBC_START_MAIN_VERSION) (DEFINE_LIBC_START_MAIN_VERSION_1) (DEFINE_LIBC_START_MAIN_VERSION): Define. * elf/dl-init.c (init_t): Move to . (call_init, _dl_init) Adjust. * sysdeps/generic/ldsodefs.h (dl_init_t): Moved from elf/dl-init.c. (DL_CALL_DT_INIT): Adjust. * sysdeps/hppa/dl-lookupcfg.h (DL_CALL_DT_INIT): Likewise. * sysdeps/ia64/dl-lookupcfg.h (DL_CALL_DT_INIT): Likewise. * sysdeps/aarch64/start.S (_start): Pass zero for init and fini. * sysdeps/alpha/start.S (_start): Likewise. * sysdeps/arm/start.S (_start): Likewise. Adjust offset of pointer to main. (.L_GOT): Adjust. * sysdeps/hppa/start.S (.Lp__libc_csu_fini, .Lp__libc_csu_init): Remove. (_start): Pass zero for init and fini. * sysdeps/ia64/start.S (_start): Pass zero for init and fini. * sysdeps/i386/start.S (_start): Likewise. * sysdeps/m68k/start.S (_start): Likewise. * sysdeps/microblaze/start.S (_start): Likewise. * sysdeps/mips/start.S (ENTRY_POINT): Likewise. * sysdeps/nios2/start.S (_start): Likewise. * sydeps/powerpc/powerpc32/start.S (start_addresses): Use zero for init and fini. * sysdeps/powerpc/powerpc64/start.S (start_addresses): Likewise. * sysdeps/unix/sysv/linux/powerpc/libc-start: Use DEFINE_LIBC_START_MAIN_VERSION. * sysdeps/riscv/start.S (ENTRY_POINT): Pass zero for init and fini. * sysdeps/s390/s390-32/start.S (_start): Pass zero for init and fini. (.L1, .L2): Remove. * sysdeps/s390/s390-64/start.S (_start): Pass zero for init and fini. * sysdeps/s390/s390-64/start.S (_start): Pass zero for init and fini. * sysdeps/sh/start.S (_start): Likewise. (L_init, L_fini): Remove. * sysdeps/sparc/sparc32/start.S (_start): Pass zero for init and fini. * sysdeps/sparc/sparc64/start.S (_start): Likewise. * sysdeps/x86_64/start.S (start): Likewise. * sysdeps/mach/hurd/i386/libc.abilist: Add __libc_start_main@GLIBC_2.28. * sysdeps/unix/sysv/linux/aarch64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/nios2/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist: Likewise. diff --git a/csu/Makefile b/csu/Makefile index f3498960f8..4fcdcfbba9 100644 --- a/csu/Makefile +++ b/csu/Makefile @@ -27,10 +27,9 @@ subdir := csu include ../Makeconfig routines = init-first libc-start $(libc-init) sysdep version check_fds \ - libc-tls elf-init dso_handle + libc-tls dso_handle aux = errno elide-routines.os = libc-tls -static-only-routines = elf-init csu-dummies = $(filter-out $(start-installed-name),crt1.o Mcrt1.o) extra-objs = start.o \ $(start-installed-name) g$(start-installed-name) $(csu-dummies) \ diff --git a/csu/Versions b/csu/Versions index 43010c3443..8fb2e360a9 100644 --- a/csu/Versions +++ b/csu/Versions @@ -7,6 +7,9 @@ libc { # New special glibc functions. gnu_get_libc_release; gnu_get_libc_version; } + GLIBC_2.28 { + __libc_start_main; + } GLIBC_PRIVATE { errno; } diff --git a/csu/elf-init.c b/csu/elf-init.c deleted file mode 100644 index 8bde25a340..0000000000 --- a/csu/elf-init.c +++ /dev/null @@ -1,107 +0,0 @@ -/* Startup support for ELF initializers/finalizers in the main executable. - Copyright (C) 2002-2018 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 Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - In addition to the permissions in the GNU Lesser General Public - License, the Free Software Foundation gives you unlimited - permission to link the compiled version of this file with other - programs, and to distribute those programs without any restriction - coming from the use of this file. (The GNU Lesser General Public - License restrictions do apply in other respects; for example, they - cover modification of the file, and distribution when not linked - into another program.) - - Note that people who make modified versions of this file are not - obligated to grant this special exception for their modified - versions; it is their choice whether to do so. The GNU Lesser - General Public License gives permission to release a modified - version without this exception; this exception also makes it - possible to release a modified version which carries forward this - exception. - - 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - . */ - -#include -#include - - -/* These magic symbols are provided by the linker. */ -extern void (*__preinit_array_start []) (int, char **, char **) - attribute_hidden; -extern void (*__preinit_array_end []) (int, char **, char **) - attribute_hidden; -extern void (*__init_array_start []) (int, char **, char **) - attribute_hidden; -extern void (*__init_array_end []) (int, char **, char **) - attribute_hidden; -extern void (*__fini_array_start []) (void) attribute_hidden; -extern void (*__fini_array_end []) (void) attribute_hidden; - - -#if ELF_INITFINI -/* These function symbols are provided for the .init/.fini section entry - points automagically by the linker. */ -extern void _init (void); -extern void _fini (void); -#endif - - -/* These functions are passed to __libc_start_main by the startup code. - These get statically linked into each program. For dynamically linked - programs, this module will come from libc_nonshared.a and differs from - the libc.a module in that it doesn't call the preinit array. */ - - -void -__libc_csu_init (int argc, char **argv, char **envp) -{ - /* For dynamically linked executables the preinit array is executed by - the dynamic linker (before initializing any shared object). */ - -#ifndef LIBC_NONSHARED - /* For static executables, preinit happens right before init. */ - { - const size_t size = __preinit_array_end - __preinit_array_start; - size_t i; - for (i = 0; i < size; i++) - (*__preinit_array_start [i]) (argc, argv, envp); - } -#endif - -#if ELF_INITFINI - _init (); -#endif - - const size_t size = __init_array_end - __init_array_start; - for (size_t i = 0; i < size; i++) - (*__init_array_start [i]) (argc, argv, envp); -} - -/* This function should not be used anymore. We run the executable's - destructor now just like any other. We cannot remove the function, - though. */ -void -__libc_csu_fini (void) -{ -#ifndef LIBC_NONSHARED - size_t i = __fini_array_end - __fini_array_start; - while (i-- > 0) - (*__fini_array_start [i]) (); - -# if ELF_INITFINI - _fini (); -# endif -#endif -} diff --git a/csu/libc-start.c b/csu/libc-start.c index 494132368f..0faa4242d8 100644 --- a/csu/libc-start.c +++ b/csu/libc-start.c @@ -1,4 +1,5 @@ -/* Copyright (C) 1998-2018 Free Software Foundation, Inc. +/* Perform initialization and invoke main. + Copyright (C) 1998-2018 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 @@ -15,6 +16,10 @@ License along with the GNU C Library; if not, see . */ +/* Note: This code is only part of the startup code proper for + statically linked binaries. For dynamically linked binaries, it + resides in libc.so. */ + #include #include #include @@ -22,6 +27,8 @@ #include #include #include +#include +#include #include @@ -88,9 +95,11 @@ apply_irel (void) # else # define STATIC static inline __attribute__ ((always_inline)) # endif +# define DO_DEFINE_LIBC_START_MAIN_VERSION 0 #else # define STATIC # define LIBC_START_MAIN __libc_start_main +# define DO_DEFINE_LIBC_START_MAIN_VERSION 1 #endif #ifdef MAIN_AUXVEC_ARG @@ -106,6 +115,92 @@ apply_irel (void) # define ARCH_INIT_CPU_FEATURES() #endif +#ifdef SHARED +/* Initialization for dynamic executables. Find the main executable + link map and run its init functions. */ +static void +call_init (int argc, char **argv, char **env) +{ + /* Obtain the main map of the executable. */ + struct link_map *l = GL(dl_ns)[LM_ID_BASE]._ns_loaded; + + /* DT_PREINIT_ARRAY is not processed here. It is already handled in + _dl_init in elf/dl-init.c. Also see the call_init function in + the same file. */ + + if (ELF_INITFINI && l->l_info[DT_INIT] != NULL) + DL_CALL_DT_INIT(l, l->l_addr + l->l_info[DT_INIT]->d_un.d_ptr, + argc, argv, env); + + ElfW(Dyn) *init_array = l->l_info[DT_INIT_ARRAY]; + if (init_array != NULL) + { + unsigned int jm + = l->l_info[DT_INIT_ARRAYSZ]->d_un.d_val / sizeof (ElfW(Addr)); + ElfW(Addr) *addrs = (void *) (init_array->d_un.d_ptr + l->l_addr); + for (unsigned int j = 0; j < jm; ++j) + ((dl_init_t) addrs[j]) (argc, argv, env); + } +} + +#else /* !SHARED */ + +/* These magic symbols are provided by the linker. */ +extern void (*__preinit_array_start []) (int, char **, char **) + attribute_hidden; +extern void (*__preinit_array_end []) (int, char **, char **) + attribute_hidden; +extern void (*__init_array_start []) (int, char **, char **) + attribute_hidden; +extern void (*__init_array_end []) (int, char **, char **) + attribute_hidden; +extern void (*__fini_array_start []) (void) attribute_hidden; +extern void (*__fini_array_end []) (void) attribute_hidden; + +# if ELF_INITFINI +/* These function symbols are provided for the .init/.fini section entry + points automagically by the linker. */ +extern void _init (void); +extern void _fini (void); +# endif + +/* Initialization for static executables. There is no dynamic + segment, so we access the symbols directly. */ +static void +call_init (int argc, char **argv, char **envp) +{ + /* For static executables, preinit happens right before init. */ + { + const size_t size = __preinit_array_end - __preinit_array_start; + size_t i; + for (i = 0; i < size; i++) + (*__preinit_array_start [i]) (argc, argv, envp); + } + +# if ELF_INITFINI + _init (); +# endif + + const size_t size = __init_array_end - __init_array_start; + for (size_t i = 0; i < size; i++) + (*__init_array_start [i]) (argc, argv, envp); +} + +/* Likewise for the destructor. */ +static void +call_fini (void *unused) +{ + size_t i = __fini_array_end - __fini_array_start; + while (i-- > 0) + (*__fini_array_start [i]) (); + +# if ELF_INITFINI + _fini (); +# endif +} + +#endif /* !SHARED */ + #include STATIC int LIBC_START_MAIN (int (*main) (int, char **, char ** @@ -122,9 +217,16 @@ STATIC int LIBC_START_MAIN (int (*main) (int, char **, char ** __attribute__ ((noreturn)); -/* Note: the fini parameter is ignored here for shared library. It - is registered with __cxa_atexit. This had the disadvantage that - finalizers were called in more than one place. */ +/* Note: The init and fini parameters are no longer used. fini is + completely unused, init is still called if not NULL, but the + current startup code always passes NULL. (In the future, it would + be possible to use fini to pass a version code if init is NULL, to + indicate the link-time glibc without introducing a hard + incompatibility for new programs with older glibc versions.) + + For dynamically linked executables, the dynamic segment is used to + locate constructors and destructors. For statically linked + executables, the relevant symbols are access directly. */ STATIC int LIBC_START_MAIN (int (*main) (int, char **, char ** MAIN_AUXVEC_DECL), int argc, char **argv, @@ -243,9 +345,8 @@ LIBC_START_MAIN (int (*main) (int, char **, char ** MAIN_AUXVEC_DECL), run the constructors in `_dl_start_user'. */ __libc_init_first (argc, argv, __environ); - /* Register the destructor of the program, if any. */ - if (fini) - __cxa_atexit ((void (*) (void *)) fini, NULL, NULL); + /* Register the destructor of the statically-linked program. */ + __cxa_atexit (call_fini, NULL, NULL); /* Some security at this point. Prevent starting a SUID binary where the standard file descriptors are not opened. We have to do this @@ -253,15 +354,24 @@ LIBC_START_MAIN (int (*main) (int, char **, char ** MAIN_AUXVEC_DECL), loader did the work already. */ if (__builtin_expect (__libc_enable_secure, 0)) __libc_check_standard_fds (); -#endif +#endif /* !SHARED */ /* Call the initializer of the program, if any. */ #ifdef SHARED if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_IMPCALLS, 0)) GLRO(dl_debug_printf) ("\ninitialize program: %s\n\n", argv[0]); -#endif - if (init) + + if (init != NULL) + /* This is a legacy program which supplied its own init + routine. */ (*init) (argc, argv, __environ MAIN_AUXVEC_PARAM); + else + /* This is a current program. Use the dynamic segment to find + constructors. */ + call_init (argc, argv, __environ); +#else /* !SHARED */ + call_init (argc, argv, __environ); +#endif /* SHARED */ #ifdef SHARED /* Auditing checkpoint: we have a new object. */ @@ -341,3 +451,28 @@ LIBC_START_MAIN (int (*main) (int, char **, char ** MAIN_AUXVEC_DECL), exit (result); } + +#ifdef SHARED +/* Starting with glibc 2.28, the init parameter is always NULL. Older + libcs are not prepared to handle that. */ +# define DEFINE_LIBC_START_MAIN_VERSION \ + DEFINE_LIBC_START_MAIN_VERSION_1 \ + versioned_symbol (libc, __libc_start_main, __libc_start_main, GLIBC_2_28); + +# if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_28) +# define DEFINE_LIBC_START_MAIN_VERSION_1 \ + strong_alias (__libc_start_main, __libc_start_main_alias) \ + compat_symbol (libc, __libc_start_main_alias, __libc_start_main, GLIBC_2_0); +# else +# define DEFINE_LIBC_START_MAIN_VERSION_1 +# endif +#else +# define DEFINE_LIBC_START_MAIN_VERSION +#endif + +/* Only define the version information if LIBC_START_MAIN was not set. + If there is a wrapper file, it must expand + DEFINE_LIBC_START_MAIN_VERSION on its own. */ +#if DO_DEFINE_LIBC_START_MAIN_VERSION +DEFINE_LIBC_START_MAIN_VERSION +#endif diff --git a/elf/dl-init.c b/elf/dl-init.c index 31eb12b974..dad3902254 100644 --- a/elf/dl-init.c +++ b/elf/dl-init.c @@ -21,10 +21,6 @@ #include -/* Type of the initializer. */ -typedef void (*init_t) (int, char **, char **); - - static void call_init (struct link_map *l, int argc, char **argv, char **env) { @@ -71,7 +67,7 @@ call_init (struct link_map *l, int argc, char **argv, char **env) addrs = (ElfW(Addr) *) (init_array->d_un.d_ptr + l->l_addr); for (j = 0; j < jm; ++j) - ((init_t) addrs[j]) (argc, argv, env); + ((dl_init_t) addrs[j]) (argc, argv, env); } } @@ -103,7 +99,7 @@ _dl_init (struct link_map *main_map, int argc, char **argv, char **env) addrs = (ElfW(Addr) *) (preinit_array->d_un.d_ptr + main_map->l_addr); for (cnt = 0; cnt < i; ++cnt) - ((init_t) addrs[cnt]) (argc, argv, env); + ((dl_init_t) addrs[cnt]) (argc, argv, env); } /* Stupid users forced the ELF specification to be changed. It now diff --git a/sysdeps/aarch64/start.S b/sysdeps/aarch64/start.S index bad000f555..2c22b6ff27 100644 --- a/sysdeps/aarch64/start.S +++ b/sysdeps/aarch64/start.S @@ -64,26 +64,16 @@ _start: # ifdef SHARED adrp x0, :got:main ldr PTR_REG (0), [x0, #:got_lo12:main] - - adrp x3, :got:__libc_csu_init - ldr PTR_REG (3), [x3, #:got_lo12:__libc_csu_init] - - adrp x4, :got:__libc_csu_fini - ldr PTR_REG (4), [x4, #:got_lo12:__libc_csu_fini] # else adrp x0, __wrap_main add x0, x0, :lo12:__wrap_main - adrp x3, __libc_csu_init - add x3, x3, :lo12:__libc_csu_init - adrp x4, __libc_csu_fini - add x4, x4, :lo12:__libc_csu_fini # endif #else /* Set up the other arguments in registers */ MOVL (0, main) - MOVL (3, __libc_csu_init) - MOVL (4, __libc_csu_fini) #endif + mov x3, #0 /* Used to be init. */ + mov x4, #0 /* Used to be fini. */ /* __libc_start_main (main, argc, argv, init, fini, rtld_fini, stack_end) */ diff --git a/sysdeps/alpha/start.S b/sysdeps/alpha/start.S index 5de8ceeca7..57ea0d67f7 100644 --- a/sysdeps/alpha/start.S +++ b/sysdeps/alpha/start.S @@ -55,9 +55,8 @@ _start: ldl a1, 16(sp) /* get argc */ lda a2, 24(sp) /* get argv */ - /* Load address of our own entry points to .fini and .init. */ - lda a3, __libc_csu_init - lda a4, __libc_csu_fini + mov $r31, a3 /* Used to be init. */ + mov $r31, a4 /* Used to be init. */ /* Store address of the shared library termination function. */ mov v0, a5 diff --git a/sysdeps/arm/start.S b/sysdeps/arm/start.S index adef090717..ad2b25c2e1 100644 --- a/sysdeps/arm/start.S +++ b/sysdeps/arm/start.S @@ -94,30 +94,20 @@ _start: adr a4, .L_GOT add sl, sl, a4 - ldr ip, .L_GOT+4 /* __libc_csu_fini */ - ldr ip, [sl, ip] + mov a4, #0 /* Used to be init. */ + push { a4 } /* Used to be fini. */ - push { ip } /* Push __libc_csu_fini */ - - ldr a4, .L_GOT+8 /* __libc_csu_init */ - ldr a4, [sl, a4] - - ldr a1, .L_GOT+12 /* main */ + ldr a1, .L_GOT+4 /* main */ ldr a1, [sl, a1] /* __libc_start_main (main, argc, argv, init, fini, rtld_fini, stack_end) */ /* Let the libc call main and exit with its return code. */ bl __libc_start_main(PLT) #else - /* Fetch address of __libc_csu_fini */ - ldr ip, =__libc_csu_fini - /* Push __libc_csu_fini */ - push { ip } - - /* Set up the other arguments in registers */ + mov a4, #0 /* Used to init. */ + push { a4 } /* Used to fini. */ ldr a1, =main - ldr a4, =__libc_csu_init /* __libc_start_main (main, argc, argv, init, fini, rtld_fini, stack_end) */ /* Let the libc call main and exit with its return code. */ @@ -131,8 +121,6 @@ _start: .align 2 .L_GOT: .word _GLOBAL_OFFSET_TABLE_ - .L_GOT - .word __libc_csu_fini(GOT) - .word __libc_csu_init(GOT) .word main(GOT) #endif diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h index 95dc87519b..76a1f0dd56 100644 --- a/sysdeps/generic/ldsodefs.h +++ b/sysdeps/generic/ldsodefs.h @@ -75,6 +75,10 @@ typedef struct link_map *lookup_t; : (__glibc_unlikely ((ref)->st_shndx == SHN_ABS) ? 0 \ : LOOKUP_VALUE_ADDRESS (map, map_set)) + (ref)->st_value) +/* Type of a constructor function, in DT_INIT, DT_INIT_ARRAY, + DT_PREINIT_ARRAY. */ +typedef void (*dl_init_t) (int, char **, char **); + /* On some architectures a pointer to a function is not just a pointer to the actual code of the function but rather an architecture specific descriptor. */ @@ -83,7 +87,7 @@ typedef struct link_map *lookup_t; (void *) SYMBOL_ADDRESS (map, ref, false) # define DL_LOOKUP_ADDRESS(addr) ((ElfW(Addr)) (addr)) # define DL_CALL_DT_INIT(map, start, argc, argv, env) \ - ((init_t) (start)) (argc, argv, env) + ((dl_init_t) (start)) (argc, argv, env) # define DL_CALL_DT_FINI(map, start) ((fini_t) (start)) () #endif diff --git a/sysdeps/hppa/dl-lookupcfg.h b/sysdeps/hppa/dl-lookupcfg.h index 38db345936..f9ef78d856 100644 --- a/sysdeps/hppa/dl-lookupcfg.h +++ b/sysdeps/hppa/dl-lookupcfg.h @@ -56,7 +56,7 @@ void attribute_hidden _dl_unmap (struct link_map *map); { \ ElfW(Addr) addr; \ DL_DT_FUNCTION_ADDRESS(map, start, , addr) \ - init_t init = (init_t) addr; \ + dl_init_t init = (dl_init_t) addr; \ init (argc, argv, env); \ } diff --git a/sysdeps/hppa/start.S b/sysdeps/hppa/start.S index c1d2bd4bb7..8ffc247827 100644 --- a/sysdeps/hppa/start.S +++ b/sysdeps/hppa/start.S @@ -36,8 +36,6 @@ .import main, code .import $global$, data .import __libc_start_main, code - .import __libc_csu_fini, code - .import __libc_csu_init, code /* Have the linker create plabel words so we get PLABEL32 relocs and not 21/14. The use of 21/14 relocs is only @@ -52,10 +50,6 @@ .word P%main .Lp__libc_start_main: .word P%__libc_start_main -.Lp__libc_csu_fini: - .word P%__libc_csu_fini -.Lp__libc_csu_init: - .word P%__libc_csu_init .text .align 4 @@ -77,8 +71,8 @@ _start: 1. r26 - Application main 2. r25 - argc 3. r24 - argv - 4. r23 - __libc_csu_init - 5. sp-52 - __libc_csu_fini + 4. r23 - init (unused) + 5. sp-52 - fini (unused) 6. sp-56 - rtld_fini 7. sp-60 - stackend */ @@ -108,14 +102,6 @@ _start: addil LT'.Lpmain, %r19 ldw RT'.Lpmain(%r1), %r26 ldw 0(%r26),%r26 - /* void (*init) (void) (4th argument) */ - addil LT'.Lp__libc_csu_init, %r19 - ldw RT'.Lp__libc_csu_init(%r1), %r23 - ldw 0(%r23), %r23 - /* void (*fini) (void) (5th argument) */ - addil LT'.Lp__libc_csu_fini, %r19 - ldw RT'.Lp__libc_csu_fini(%r1), %r22 - ldw 0(%r22), %r22 #else /* Load $global$ address into %dp */ ldil L%$global$, %dp @@ -124,13 +110,9 @@ _start: /* load main (1st argument) */ ldil LR'.Lpmain, %r26 ldw RR'.Lpmain(%r26), %r26 - /* void (*init) (void) (4th argument) */ - ldil LR'.Lp__libc_csu_init, %r23 - ldw RR'.Lp__libc_csu_init(%r23), %r23 - /* void (*fini) (void) (5th argument) */ - ldil LR'.Lp__libc_csu_fini, %r22 - ldw RR'.Lp__libc_csu_fini(%r22), %r22 #endif + ldi 0,%r23 /* Used to be init. */ + ldi 0,%r22 /* Used to be fini. */ /* Store 5th argument */ stw %r22, -52(%sp) /* void *stack_end (7th argument) */ diff --git a/sysdeps/i386/start.S b/sysdeps/i386/start.S index 91035fa83f..92781dc121 100644 --- a/sysdeps/i386/start.S +++ b/sysdeps/i386/start.S @@ -86,11 +86,9 @@ _start: call 1f addl $_GLOBAL_OFFSET_TABLE_, %ebx - /* Push address of our own entry points to .fini and .init. */ - leal __libc_csu_fini@GOTOFF(%ebx), %eax - pushl %eax - leal __libc_csu_init@GOTOFF(%ebx), %eax - pushl %eax + /* This used to be the addresses of .fini and .init. */ + pushl $0 + pushl $0 pushl %ecx /* Push second argument: argv. */ pushl %esi /* Push first argument: argc. */ @@ -111,9 +109,9 @@ _start: But let the libc call main. */ call __libc_start_main@PLT #else - /* Push address of our own entry points to .fini and .init. */ - pushl $__libc_csu_fini - pushl $__libc_csu_init + /* This used to be the addresses of .fini and .init. */ + pushl $0 + pushl $0 pushl %ecx /* Push second argument: argv. */ pushl %esi /* Push first argument: argc. */ diff --git a/sysdeps/ia64/dl-lookupcfg.h b/sysdeps/ia64/dl-lookupcfg.h index 48f91202c4..83734a9562 100644 --- a/sysdeps/ia64/dl-lookupcfg.h +++ b/sysdeps/ia64/dl-lookupcfg.h @@ -50,7 +50,7 @@ extern void attribute_hidden _dl_unmap (struct link_map *map); { \ ElfW(Addr) addr; \ DL_DT_FUNCTION_ADDRESS(map, start, , addr) \ - init_t init = (init_t) addr; \ + dl_init_t init = (dl_init_t) addr; \ init (argc, argv, env); \ } diff --git a/sysdeps/ia64/start.S b/sysdeps/ia64/start.S index 04205aa94f..6c3e468bcb 100644 --- a/sysdeps/ia64/start.S +++ b/sysdeps/ia64/start.S @@ -83,20 +83,15 @@ _start: { addl r11 = @ltoff(__libc_ia64_register_backing_store_base), gp addl out0 = @ltoff(@fptr(main)), gp - addl out3 = @ltoff(@fptr(__libc_csu_init)), gp + mov out3 = r0 /* Used to be init. */ ;; } { .mmi ld8 r3 = [r11] /* pointer to __libc_ia64_register_backing_store_base */ ld8 out0 = [out0] /* pointer to `main' function descriptor */ - addl out4 = @ltoff(@fptr(__libc_csu_fini)), gp + mov out4 = r0 /* Used to be fini. */ ;; } - { .mmi - ld8 out3 = [out3] /* pointer to `init' function descriptor */ - ld8 out4 = [out4] /* pointer to `fini' function descriptor */ - nop 0 - } .body { .mib st8 [r3] = r10 diff --git a/sysdeps/m68k/start.S b/sysdeps/m68k/start.S index 7bab3e1cde..7d151a3205 100644 --- a/sysdeps/m68k/start.S +++ b/sysdeps/m68k/start.S @@ -76,15 +76,14 @@ _start: pea (%a1) /* Push address of the shared library termination function. */ + /* These used to be addresses of the .fini and .init entry points. */ + clr.l -(%sp) + clr.l -(%sp) + #ifdef PIC /* Load PIC register. */ LOAD_GOT (%a5) - /* Push the address of our own entry points to `.fini' and - `.init'. */ - move.l __libc_csu_fini@GOT(%a5), -(%sp) - move.l __libc_csu_init@GOT(%a5), -(%sp) - pea (%a0) /* Push second argument: argv. */ move.l %d0, -(%sp) /* Push first argument: argc. */ @@ -94,10 +93,6 @@ _start: let the libc call main. */ jbsr __libc_start_main@PLTPC #else - /* Push the address of our own entry points to `.fini' and - `.init'. */ - pea __libc_csu_fini - pea __libc_csu_init pea (%a0) /* Push second argument: argv. */ move.l %d0, -(%sp) /* Push first argument: argc. */ diff --git a/sysdeps/mach/hurd/i386/libc.abilist b/sysdeps/mach/hurd/i386/libc.abilist index 3d46de795d..bc1b2c0658 100644 --- a/sysdeps/mach/hurd/i386/libc.abilist +++ b/sysdeps/mach/hurd/i386/libc.abilist @@ -2033,6 +2033,7 @@ GLIBC_2.27 wcstof64 F GLIBC_2.27 wcstof64_l F GLIBC_2.27 wcstof64x F GLIBC_2.27 wcstof64x_l F +GLIBC_2.28 __libc_start_main F GLIBC_2.28 fcntl F GLIBC_2.28 fcntl64 F GLIBC_2.3 __ctype_b_loc F diff --git a/sysdeps/microblaze/start.S b/sysdeps/microblaze/start.S index cc8dd13fe4..39f858ab71 100644 --- a/sysdeps/microblaze/start.S +++ b/sysdeps/microblaze/start.S @@ -63,14 +63,14 @@ _start: mfs r20,rpc addik r20,r20,_GLOBAL_OFFSET_TABLE_+8 lwi r5,r20,main@GOT - lwi r8,r20,__libc_csu_init@GOT - lwi r9,r20,__libc_csu_fini@GOT + addk r8,r0,r0 /* Used to be init. */ + addk r8,r0,r0 /* Used to be fini. */ brid __libc_start_main@PLT addk r10,r0,r0 #else addik r5,r0,main - addik r8,r0,__libc_csu_init - addik r9,r0,__libc_csu_fini + addk r8,r0,r0 /* Used to be init. */ + addk r8,r0,r0 /* Used to be fini. */ brid __libc_start_main addk r10,r0,r0 #endif diff --git a/sysdeps/mips/start.S b/sysdeps/mips/start.S index a4c4ef0fae..f1ba04bc97 100644 --- a/sysdeps/mips/start.S +++ b/sysdeps/mips/start.S @@ -96,10 +96,9 @@ ENTRY_POINT: # if _MIPS_SIM == _ABIO32 PTR_SUBIU $29, 32 # endif - PTR_LA $7, __libc_csu_init /* init */ - PTR_LA $8, __libc_csu_fini + move $7, $0 /* init */ # if _MIPS_SIM == _ABIO32 - PTR_S $8, 16($29) /* fini */ + PTR_S $0, 16($29) /* fini */ PTR_S $2, 20($29) /* rtld_fini */ PTR_S $29, 24($29) /* stack_end */ # else @@ -143,19 +142,17 @@ ENTRY_POINT: /* Lay out last arguments, and call __libc_start_main(). */ # ifdef __PIC__ sw $7, 24($sp) /* stack_end */ - lw $4, %got(__libc_csu_fini)($3) - lw $7, %got(__libc_csu_init)($3) /* init */ - sw $4, 16($sp) /* fini */ + move $4, $0 /* Used to be ini. */ + sw $0, 16($sp) /* Used to be fini. */ lw $4, %got(main)($3) /* main */ lw $3, %call16(__libc_start_main)($3) sw $2, 20($sp) /* rtld_fini */ move $25, $3 jalr $3 # else - lw $4, 1f sw $7, 24($sp) /* stack_end */ - lw $7, 2f /* init */ - sw $4, 16($sp) /* fini */ + move $7, $0 /* Used to be init. */ + sw $0, 16($sp) /* Used to be fini. */ lw $4, 3f /* main */ sw $2, 20($sp) /* rtld_fini */ /* Load and call __libc_start_main(). */ @@ -165,8 +162,6 @@ ENTRY_POINT: hlt: b hlt /* Crash if somehow it does return. */ # ifndef __PIC__ .align 2 -1: .word __libc_csu_fini -2: .word __libc_csu_init 3: .word main 4: .word __libc_start_main # endif diff --git a/sysdeps/nios2/start.S b/sysdeps/nios2/start.S index fa224ef75c..51a0757d78 100644 --- a/sysdeps/nios2/start.S +++ b/sysdeps/nios2/start.S @@ -92,18 +92,11 @@ _start: addi r2, r2, %lo(_gp_got - 1b) add r22, r22, r2 - /* Push fini */ - movhi r8, %call_hiadj(__libc_csu_fini) - addi r8, r8, %call_lo(__libc_csu_fini) - add r8, r8, r22 - ldw r8, 0(r8) - stw r8, 0(sp) + /* Used to be fini. */ + stw zero, 0(sp) - /* r7 == init */ - movhi r7, %call_hiadj(__libc_csu_init) - addi r7, r7, %call_lo(__libc_csu_init) - add r7, r7, r22 - ldw r7, 0(r7) + /* Used to be init. */ + mov r7, zero /* r6 == argv */ addi r6, sp, 16 diff --git a/sysdeps/powerpc/powerpc32/start.S b/sysdeps/powerpc/powerpc32/start.S index 5c10a22f8a..0be6aed543 100644 --- a/sysdeps/powerpc/powerpc32/start.S +++ b/sysdeps/powerpc/powerpc32/start.S @@ -52,8 +52,8 @@ L(start_addresses): .long _SDA_BASE_ .long main - .long __libc_csu_init - .long __libc_csu_fini + .long 0 /* Used to be init. */ + .long 0 /* Used to be fini. */ ASM_SIZE_DIRECTIVE(L(start_addresses)) .section ".text" diff --git a/sysdeps/powerpc/powerpc64/start.S b/sysdeps/powerpc/powerpc64/start.S index bd7189310c..149afbeab1 100644 --- a/sysdeps/powerpc/powerpc64/start.S +++ b/sysdeps/powerpc/powerpc64/start.S @@ -53,8 +53,8 @@ L(start_addresses): .quad 0 /* was _SDA_BASE_ but not in 64-bit ABI*/ /* function descriptors so don't need JUMPTARGET */ .quad main - .quad __libc_csu_init - .quad __libc_csu_fini + .quad 0 /* Used to be init. */ + .quad 0 /* Used to be fini. */ ASM_SIZE_DIRECTIVE(L(start_addresses)) diff --git a/sysdeps/riscv/start.S b/sysdeps/riscv/start.S index 4635ddb5eb..9dd4714910 100644 --- a/sysdeps/riscv/start.S +++ b/sysdeps/riscv/start.S @@ -50,8 +50,8 @@ ENTRY (ENTRY_POINT) REG_L a1, 0(sp) /* argc. */ addi a2, sp, SZREG /* argv. */ andi sp, sp, ALMASK /* Align stack. */ - lla a3, __libc_csu_init - lla a4, __libc_csu_fini + li a3, 0 /* Used to be init. */ + li a4, 0 /* Used to be fini. */ mv a6, sp /* stack_end. */ tail __libc_start_main@plt diff --git a/sysdeps/s390/s390-32/start.S b/sysdeps/s390/s390-32/start.S index 1483642985..4587b2de5e 100644 --- a/sysdeps/s390/s390-32/start.S +++ b/sysdeps/s390/s390-32/start.S @@ -175,18 +175,16 @@ _start: */ stm %r14,%r15,96(%r15) # store rtld_fini/stack_end to parameter area la %r7,96(%r15) - l %r6,.L2-.Llit(%r13) # load pointer to __libc_csu_fini - l %r5,.L1-.Llit(%r13) # load pointer to __libc_csu_init l %r2,.L3-.Llit(%r13) # load pointer to main l %r1,.L4-.Llit(%r13) # load pointer to __libc_start_main #ifdef PIC l %r12,.L5-.Llit(%r13) # load .got pointer - la %r6,0(%r13,%r6) - la %r5,0(%r13,%r5) la %r12,0(%r13,%r12) l %r2,0(%r12,%r2) la %r1,0(%r13,%r1) #endif + lhi %r6, 0 # Used to fini. + lhi %r5, 0 # Used to init. /* ok, now branch to the libc main routine */ basr %r14,%r1 @@ -197,13 +195,9 @@ _start: cfi_endproc .Llit: #ifndef PIC -.L1: .long __libc_csu_init -.L2: .long __libc_csu_fini .L3: .long main .L4: .long __libc_start_main #else -.L1: .long __libc_csu_init-.Llit -.L2: .long __libc_csu_fini-.Llit .L3: .long main@GOT .L4: .long __libc_start_main@plt-.Llit .L5: .long _GLOBAL_OFFSET_TABLE_-.Llit diff --git a/sysdeps/s390/s390-64/start.S b/sysdeps/s390/s390-64/start.S index 79e7b69f1d..518dfd989e 100644 --- a/sysdeps/s390/s390-64/start.S +++ b/sysdeps/s390/s390-64/start.S @@ -80,8 +80,8 @@ _start: */ stmg %r14,%r15,160(%r15) # store rtld_fini/stack_end to parameter area la %r7,160(%r15) - larl %r6,__libc_csu_fini # load pointer to __libc_csu_fini - larl %r5,__libc_csu_init # load pointer to __libc_csu_init + lghi %r6,0 # Used to be fini. + lghi %r5,0 # Used to be init. /* Ok, now branch to the libc main routine. */ #ifdef PIC diff --git a/sysdeps/sh/start.S b/sysdeps/sh/start.S index f52077abca..4b0aad511b 100644 --- a/sysdeps/sh/start.S +++ b/sysdeps/sh/start.S @@ -70,12 +70,11 @@ _start: /* Push the last arguments to main() onto the stack */ mov.l r4,@-r15 - mov.l L_fini,r0 - mov.l r0,@-r15 + mov.l r14,@-r15 /* Used to be fini. */ /* Set up the other arguments for main() that go in registers */ mov.l L_main,r4 - mov.l L_init,r7 + mov #0,r7 /* Used to be init. */ /* __libc_start_main (main, argc, argv, init, fini, rtld_fini) */ @@ -90,10 +89,6 @@ _start: .align 2 L_main: .long main -L_init: - .long __libc_csu_init -L_fini: - .long __libc_csu_fini L_libc_start_main: .long __libc_start_main L_abort: diff --git a/sysdeps/sparc/sparc32/start.S b/sysdeps/sparc/sparc32/start.S index 46ba8b6afa..48b30a3fb5 100644 --- a/sysdeps/sparc/sparc32/start.S +++ b/sysdeps/sparc/sparc32/start.S @@ -59,22 +59,14 @@ _start: /* Load the addresses of the user entry points. */ #ifndef PIC sethi %hi(main), %o0 - sethi %hi(__libc_csu_init), %o3 - sethi %hi(__libc_csu_fini), %o4 or %o0, %lo(main), %o0 - or %o3, %lo(__libc_csu_init), %o3 - or %o4, %lo(__libc_csu_fini), %o4 #else sethi %gdop_hix22(main), %o0 - sethi %gdop_hix22(__libc_csu_init), %o3 - sethi %gdop_hix22(__libc_csu_fini), %o4 xor %o0, %gdop_lox10(main), %o0 - xor %o3, %gdop_lox10(__libc_csu_init), %o3 - xor %o4, %gdop_lox10(__libc_csu_fini), %o4 ld [%l7 + %o0], %o0, %gdop(main) - ld [%l7 + %o3], %o3, %gdop(__libc_csu_init) - ld [%l7 + %o4], %o4, %gdop(__libc_csu_fini) #endif + mov 0, %o3 /* Used to be init. */ + mov 0, %o4 /* Used to be fini. */ /* When starting a binary via the dynamic linker, %g1 contains the address of the shared library termination function, which will be diff --git a/sysdeps/sparc/sparc64/start.S b/sysdeps/sparc/sparc64/start.S index 75ff5093dc..73395df40a 100644 --- a/sysdeps/sparc/sparc64/start.S +++ b/sysdeps/sparc/sparc64/start.S @@ -60,22 +60,14 @@ _start: /* Load the addresses of the user entry points. */ #ifndef PIC sethi %hi(main), %o0 - sethi %hi(__libc_csu_init), %o3 - sethi %hi(__libc_csu_fini), %o4 or %o0, %lo(main), %o0 - or %o3, %lo(__libc_csu_init), %o3 - or %o4, %lo(__libc_csu_fini), %o4 #else sethi %gdop_hix22(main), %o0 - sethi %gdop_hix22(__libc_csu_init), %o3 - sethi %gdop_hix22(__libc_csu_fini), %o4 xor %o0, %gdop_lox10(main), %o0 - xor %o3, %gdop_lox10(__libc_csu_init), %o3 - xor %o4, %gdop_lox10(__libc_csu_fini), %o4 ldx [%l7 + %o0], %o0, %gdop(main) - ldx [%l7 + %o3], %o3, %gdop(__libc_csu_init) - ldx [%l7 + %o4], %o4, %gdop(__libc_csu_fini) #endif + mov 0, %o3 /* Used to be init. */ + mov 0, %o4 /* Used to be fini. */ /* When starting a binary via the dynamic linker, %g1 contains the address of the shared library termination function, which will be diff --git a/sysdeps/unix/sysv/linux/aarch64/libc.abilist b/sysdeps/unix/sysv/linux/aarch64/libc.abilist index 884d0dfa95..55381e98a8 100644 --- a/sysdeps/unix/sysv/linux/aarch64/libc.abilist +++ b/sysdeps/unix/sysv/linux/aarch64/libc.abilist @@ -2131,4 +2131,5 @@ GLIBC_2.27 wcstof64 F GLIBC_2.27 wcstof64_l F GLIBC_2.27 wcstof64x F GLIBC_2.27 wcstof64x_l F +GLIBC_2.28 __libc_start_main F GLIBC_2.28 fcntl64 F diff --git a/sysdeps/unix/sysv/linux/alpha/libc.abilist b/sysdeps/unix/sysv/linux/alpha/libc.abilist index 28d54b9794..066c0dedba 100644 --- a/sysdeps/unix/sysv/linux/alpha/libc.abilist +++ b/sysdeps/unix/sysv/linux/alpha/libc.abilist @@ -2026,6 +2026,7 @@ GLIBC_2.27 wcstof64 F GLIBC_2.27 wcstof64_l F GLIBC_2.27 wcstof64x F GLIBC_2.27 wcstof64x_l F +GLIBC_2.28 __libc_start_main F GLIBC_2.28 fcntl64 F GLIBC_2.3 __ctype_b_loc F GLIBC_2.3 __ctype_tolower_loc F diff --git a/sysdeps/unix/sysv/linux/arm/libc.abilist b/sysdeps/unix/sysv/linux/arm/libc.abilist index dfde3bd725..bb6ea42885 100644 --- a/sysdeps/unix/sysv/linux/arm/libc.abilist +++ b/sysdeps/unix/sysv/linux/arm/libc.abilist @@ -115,6 +115,7 @@ GLIBC_2.27 wcstof32x F GLIBC_2.27 wcstof32x_l F GLIBC_2.27 wcstof64 F GLIBC_2.27 wcstof64_l F +GLIBC_2.28 __libc_start_main F GLIBC_2.28 fcntl F GLIBC_2.28 fcntl64 F GLIBC_2.4 _Exit F diff --git a/sysdeps/unix/sysv/linux/hppa/libc.abilist b/sysdeps/unix/sysv/linux/hppa/libc.abilist index 06b00f730a..df2fd63659 100644 --- a/sysdeps/unix/sysv/linux/hppa/libc.abilist +++ b/sysdeps/unix/sysv/linux/hppa/libc.abilist @@ -1872,6 +1872,7 @@ GLIBC_2.27 wcstof32x F GLIBC_2.27 wcstof32x_l F GLIBC_2.27 wcstof64 F GLIBC_2.27 wcstof64_l F +GLIBC_2.28 __libc_start_main F GLIBC_2.28 fcntl F GLIBC_2.28 fcntl64 F GLIBC_2.3 __ctype_b_loc F diff --git a/sysdeps/unix/sysv/linux/i386/libc.abilist b/sysdeps/unix/sysv/linux/i386/libc.abilist index 1c1cc00d40..818988243e 100644 --- a/sysdeps/unix/sysv/linux/i386/libc.abilist +++ b/sysdeps/unix/sysv/linux/i386/libc.abilist @@ -2037,6 +2037,7 @@ GLIBC_2.27 wcstof64 F GLIBC_2.27 wcstof64_l F GLIBC_2.27 wcstof64x F GLIBC_2.27 wcstof64x_l F +GLIBC_2.28 __libc_start_main F GLIBC_2.28 fcntl F GLIBC_2.28 fcntl64 F GLIBC_2.3 __ctype_b_loc F diff --git a/sysdeps/unix/sysv/linux/ia64/libc.abilist b/sysdeps/unix/sysv/linux/ia64/libc.abilist index f6e17a005f..914b85c09c 100644 --- a/sysdeps/unix/sysv/linux/ia64/libc.abilist +++ b/sysdeps/unix/sysv/linux/ia64/libc.abilist @@ -1907,6 +1907,7 @@ GLIBC_2.27 wcstof64 F GLIBC_2.27 wcstof64_l F GLIBC_2.27 wcstof64x F GLIBC_2.27 wcstof64x_l F +GLIBC_2.28 __libc_start_main F GLIBC_2.28 fcntl64 F GLIBC_2.3 __ctype_b_loc F GLIBC_2.3 __ctype_tolower_loc F diff --git a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist index ee054a618d..653977528d 100644 --- a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist +++ b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist @@ -116,6 +116,7 @@ GLIBC_2.27 wcstof32x F GLIBC_2.27 wcstof32x_l F GLIBC_2.27 wcstof64 F GLIBC_2.27 wcstof64_l F +GLIBC_2.28 __libc_start_main F GLIBC_2.28 fcntl F GLIBC_2.28 fcntl64 F GLIBC_2.4 _Exit F diff --git a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist index 227a0581cb..272ec82747 100644 --- a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist +++ b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist @@ -1981,6 +1981,7 @@ GLIBC_2.27 wcstof32x F GLIBC_2.27 wcstof32x_l F GLIBC_2.27 wcstof64 F GLIBC_2.27 wcstof64_l F +GLIBC_2.28 __libc_start_main F GLIBC_2.28 fcntl F GLIBC_2.28 fcntl64 F GLIBC_2.3 __ctype_b_loc F diff --git a/sysdeps/unix/sysv/linux/microblaze/libc.abilist b/sysdeps/unix/sysv/linux/microblaze/libc.abilist index 18781b3017..eebe614306 100644 --- a/sysdeps/unix/sysv/linux/microblaze/libc.abilist +++ b/sysdeps/unix/sysv/linux/microblaze/libc.abilist @@ -2122,5 +2122,6 @@ GLIBC_2.27 wcstof32x F GLIBC_2.27 wcstof32x_l F GLIBC_2.27 wcstof64 F GLIBC_2.27 wcstof64_l F +GLIBC_2.28 __libc_start_main F GLIBC_2.28 fcntl F GLIBC_2.28 fcntl64 F diff --git a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist index 2d86989cf2..4b5729c284 100644 --- a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist +++ b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist @@ -1959,6 +1959,7 @@ GLIBC_2.27 wcstof32x F GLIBC_2.27 wcstof32x_l F GLIBC_2.27 wcstof64 F GLIBC_2.27 wcstof64_l F +GLIBC_2.28 __libc_start_main F GLIBC_2.28 fcntl F GLIBC_2.28 fcntl64 F GLIBC_2.3 __ctype_b_loc F diff --git a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist index b8b113e1a5..fba08ce853 100644 --- a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist +++ b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist @@ -1957,6 +1957,7 @@ GLIBC_2.27 wcstof32x F GLIBC_2.27 wcstof32x_l F GLIBC_2.27 wcstof64 F GLIBC_2.27 wcstof64_l F +GLIBC_2.28 __libc_start_main F GLIBC_2.28 fcntl F GLIBC_2.28 fcntl64 F GLIBC_2.3 __ctype_b_loc F diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist index 6a3cd13e2d..b6c94e202a 100644 --- a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist +++ b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist @@ -1965,6 +1965,7 @@ GLIBC_2.27 wcstof64 F GLIBC_2.27 wcstof64_l F GLIBC_2.27 wcstof64x F GLIBC_2.27 wcstof64x_l F +GLIBC_2.28 __libc_start_main F GLIBC_2.28 fcntl F GLIBC_2.28 fcntl64 F GLIBC_2.3 __ctype_b_loc F diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist index 596ec05379..24fcefb660 100644 --- a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist +++ b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist @@ -1961,6 +1961,7 @@ GLIBC_2.27 wcstof64 F GLIBC_2.27 wcstof64_l F GLIBC_2.27 wcstof64x F GLIBC_2.27 wcstof64x_l F +GLIBC_2.28 __libc_start_main F GLIBC_2.28 fcntl64 F GLIBC_2.3 __ctype_b_loc F GLIBC_2.3 __ctype_tolower_loc F diff --git a/sysdeps/unix/sysv/linux/nios2/libc.abilist b/sysdeps/unix/sysv/linux/nios2/libc.abilist index 8da18eed57..bb64e4b43d 100644 --- a/sysdeps/unix/sysv/linux/nios2/libc.abilist +++ b/sysdeps/unix/sysv/linux/nios2/libc.abilist @@ -2163,5 +2163,6 @@ GLIBC_2.27 wcstof32x F GLIBC_2.27 wcstof32x_l F GLIBC_2.27 wcstof64 F GLIBC_2.27 wcstof64_l F +GLIBC_2.28 __libc_start_main F GLIBC_2.28 fcntl F GLIBC_2.28 fcntl64 F diff --git a/sysdeps/unix/sysv/linux/powerpc/libc-start.c b/sysdeps/unix/sysv/linux/powerpc/libc-start.c index f2ad0c355d..522926604b 100644 --- a/sysdeps/unix/sysv/linux/powerpc/libc-start.c +++ b/sysdeps/unix/sysv/linux/powerpc/libc-start.c @@ -103,3 +103,4 @@ __libc_start_main (int argc, char **argv, stinfo->init, stinfo->fini, rtld_fini, stack_on_entry); } +DEFINE_LIBC_START_MAIN_VERSION diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist index 555751eb12..997210f64c 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist @@ -1985,6 +1985,7 @@ GLIBC_2.27 wcstof32x F GLIBC_2.27 wcstof32x_l F GLIBC_2.27 wcstof64 F GLIBC_2.27 wcstof64_l F +GLIBC_2.28 __libc_start_main F GLIBC_2.28 fcntl F GLIBC_2.28 fcntl64 F GLIBC_2.3 __ctype_b_loc F diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist index 80324e41aa..1b54e27556 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist @@ -1989,6 +1989,7 @@ GLIBC_2.27 wcstof32x F GLIBC_2.27 wcstof32x_l F GLIBC_2.27 wcstof64 F GLIBC_2.27 wcstof64_l F +GLIBC_2.28 __libc_start_main F GLIBC_2.28 fcntl F GLIBC_2.28 fcntl64 F GLIBC_2.3 __ctype_b_loc F diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist index 97b1d354af..d124c12eab 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist @@ -2221,4 +2221,5 @@ GLIBC_2.27 wcstof64 F GLIBC_2.27 wcstof64_l F GLIBC_2.27 wcstof64x F GLIBC_2.27 wcstof64x_l F +GLIBC_2.28 __libc_start_main F GLIBC_2.28 fcntl64 F diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist index 15be314921..87e0baf761 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist @@ -116,6 +116,7 @@ GLIBC_2.27 wcstof32x F GLIBC_2.27 wcstof32x_l F GLIBC_2.27 wcstof64 F GLIBC_2.27 wcstof64_l F +GLIBC_2.28 __libc_start_main F GLIBC_2.28 fcntl64 F GLIBC_2.3 _Exit F GLIBC_2.3 _IO_2_1_stderr_ D 0xe0 diff --git a/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist b/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist index 436b992251..8b5a2302ee 100644 --- a/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist +++ b/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist @@ -2093,4 +2093,5 @@ GLIBC_2.27 xdrstdio_create F GLIBC_2.27 xencrypt F GLIBC_2.27 xprt_register F GLIBC_2.27 xprt_unregister F +GLIBC_2.28 __libc_start_main F GLIBC_2.28 fcntl64 F diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist index f66715f0c9..838fc5e1dc 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist +++ b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist @@ -1994,6 +1994,7 @@ GLIBC_2.27 wcstof64 F GLIBC_2.27 wcstof64_l F GLIBC_2.27 wcstof64x F GLIBC_2.27 wcstof64x_l F +GLIBC_2.28 __libc_start_main F GLIBC_2.28 fcntl F GLIBC_2.28 fcntl64 F GLIBC_2.3 __ctype_b_loc F diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist index bd6242861b..d738bf3659 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist +++ b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist @@ -1900,6 +1900,7 @@ GLIBC_2.27 wcstof64 F GLIBC_2.27 wcstof64_l F GLIBC_2.27 wcstof64x F GLIBC_2.27 wcstof64x_l F +GLIBC_2.28 __libc_start_main F GLIBC_2.28 fcntl64 F GLIBC_2.3 __ctype_b_loc F GLIBC_2.3 __ctype_tolower_loc F diff --git a/sysdeps/unix/sysv/linux/sh/libc.abilist b/sysdeps/unix/sysv/linux/sh/libc.abilist index f2f070fbce..c04c3bae24 100644 --- a/sysdeps/unix/sysv/linux/sh/libc.abilist +++ b/sysdeps/unix/sysv/linux/sh/libc.abilist @@ -1876,6 +1876,7 @@ GLIBC_2.27 wcstof32x F GLIBC_2.27 wcstof32x_l F GLIBC_2.27 wcstof64 F GLIBC_2.27 wcstof64_l F +GLIBC_2.28 __libc_start_main F GLIBC_2.28 fcntl F GLIBC_2.28 fcntl64 F GLIBC_2.3 __ctype_b_loc F diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist index 265087f6a8..5f865dad28 100644 --- a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist +++ b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist @@ -1988,6 +1988,7 @@ GLIBC_2.27 wcstof64 F GLIBC_2.27 wcstof64_l F GLIBC_2.27 wcstof64x F GLIBC_2.27 wcstof64x_l F +GLIBC_2.28 __libc_start_main F GLIBC_2.28 fcntl F GLIBC_2.28 fcntl64 F GLIBC_2.3 __ctype_b_loc F diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist index 16a69812cb..5caf4992d8 100644 --- a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist +++ b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist @@ -1930,6 +1930,7 @@ GLIBC_2.27 wcstof64 F GLIBC_2.27 wcstof64_l F GLIBC_2.27 wcstof64x F GLIBC_2.27 wcstof64x_l F +GLIBC_2.28 __libc_start_main F GLIBC_2.28 fcntl64 F GLIBC_2.3 __ctype_b_loc F GLIBC_2.3 __ctype_tolower_loc F diff --git a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist index fa8c198d13..950208aee8 100644 --- a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist +++ b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist @@ -1889,6 +1889,7 @@ GLIBC_2.27 wcstof64_l F GLIBC_2.27 wcstof64x F GLIBC_2.27 wcstof64x_l F GLIBC_2.28 fcntl64 F +GLIBC_2.28 __libc_start_main F GLIBC_2.3 __ctype_b_loc F GLIBC_2.3 __ctype_tolower_loc F GLIBC_2.3 __ctype_toupper_loc F diff --git a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist index 2536971682..ed5762bba2 100644 --- a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist +++ b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist @@ -2140,3 +2140,4 @@ GLIBC_2.27 wcstof64_l F GLIBC_2.27 wcstof64x F GLIBC_2.27 wcstof64x_l F GLIBC_2.28 fcntl64 F +GLIBC_2.28 __libc_start_main F diff --git a/sysdeps/x86_64/start.S b/sysdeps/x86_64/start.S index 354d2e6ec7..8060586b5c 100644 --- a/sysdeps/x86_64/start.S +++ b/sysdeps/x86_64/start.S @@ -96,17 +96,13 @@ ENTRY (_start) which grow downwards). */ pushq %rsp + /* These used to be the addresses of .fini and .init. */ + xor %R8_LP, %R8_LP + xor %RCX_LP, %RCX_LP + #ifdef PIC - /* Pass address of our own entry points to .fini and .init. */ - mov __libc_csu_fini@GOTPCREL(%rip), %R8_LP - mov __libc_csu_init@GOTPCREL(%rip), %RCX_LP - mov main@GOTPCREL(%rip), %RDI_LP #else - /* Pass address of our own entry points to .fini and .init. */ - mov $__libc_csu_fini, %R8_LP - mov $__libc_csu_init, %RCX_LP - mov $main, %RDI_LP #endif