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Reduce the statically linked startup code [BZ #23323]

Browse Source 
It turns out the startup code in csu/elf-init.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_2.34 is introduced because
new binaries running on an old libc would not run their ELF
constructors, leading to difficult-to-debug issues.
This commit is contained in:
Florian Weimer 2021-02-25 12:10:57 +01:00
parent a79328c745
commit 035c012e32
63 changed files with 275 additions and 314 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
csu/Makefile
View File

@ -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) \
@ -59,13 +58,6 @@ CFLAGS-.os += $(no-stack-protector)
# but it does not matter for this source file.
CFLAGS-static-reloc.os += $(stack-protector)
# This file is not actually part of the startup code in the nonshared
# case and statically linked into applications. See
# <https://sourceware.org/bugzilla/show_bug.cgi?id=23323>,
# <https://sourceware.org/ml/libc-alpha/2018-06/msg00717.html>.
# Also see the note above regarding STACK_PROTECTOR_LEVEL.
CFLAGS-elf-init.oS += $(stack-protector)
ifeq (yes,$(build-shared))
extra-objs += S$(start-installed-name) gmon-start.os
ifneq ($(start-installed-name),$(static-start-installed-name))

3
csu/Versions
View File

@ -7,6 +7,9 @@ libc {
# New special glibc functions.
gnu_get_libc_release; gnu_get_libc_version;
}
GLIBC_2.34 {
__libc_start_main;
}
GLIBC_PRIVATE {
errno;
}

107
csu/elf-init.c
View File

@ -1,107 +0,0 @@
/* Startup support for ELF initializers/finalizers in the main executable.
Copyright (C) 2002-2021 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
<https://www.gnu.org/licenses/>. */
#include <stddef.h>
#include <elf-initfini.h>
/* 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
}

166
csu/libc-start.c
View File

@ -1,4 +1,5 @@
/* Copyright (C) 1998-2021 Free Software Foundation, Inc.
/* Perform initialization and invoke main.
Copyright (C) 1998-2021 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
@ -15,10 +16,15 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
/* Note: This code is only part of the startup code proper for
statically linked binaries. For dynamically linked binaries, it
resides in libc.so. */
/* Mark symbols hidden in static PIE for early self relocation to work. */
#if BUILD_PIE_DEFAULT
# pragma GCC visibility push(hidden)
#endif
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
@ -29,6 +35,8 @@
#include <libc-internal.h>
#include <elf/libc-early-init.h>
#include <stdbool.h>
#include <elf-initfini.h>
#include <shlib-compat.h>
#include <elf/dl-tunables.h>
@ -95,9 +103,11 @@ 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 LIBC_START_MAIN __libc_start_main_impl
# define DO_DEFINE_LIBC_START_MAIN_VERSION 1
#endif
#ifdef MAIN_AUXVEC_ARG
@ -113,6 +123,92 @@ 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 <libc-start.h>
STATIC int LIBC_START_MAIN (int (*main) (int, char **, char **
@ -129,9 +225,16 @@ 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,
@ -258,9 +361,8 @@ 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
@ -268,15 +370,24 @@ 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. */
@ -365,3 +476,36 @@ LIBC_START_MAIN (int (*main) (int, char **, char ** MAIN_AUXVEC_DECL),
exit (result);
}
/* Starting with glibc 2.34, the init parameter is always NULL. Older
libcs are not prepared to handle that. The macro
DEFINE_LIBC_START_MAIN_VERSION creates GLIBC_2.34 alias, so that
newly linked binaries reflect that dependency. The macros below
expect that the exported function is called
__libc_start_main_impl. */
#ifdef SHARED
# define DEFINE_LIBC_START_MAIN_VERSION \
DEFINE_LIBC_START_MAIN_VERSION_1 \
strong_alias (__libc_start_main_impl, __libc_start_main_alias_2) \
versioned_symbol (libc, __libc_start_main_alias_2, __libc_start_main, \
GLIBC_2_34);
# if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_34)
# define DEFINE_LIBC_START_MAIN_VERSION_1 \
strong_alias (__libc_start_main_impl, __libc_start_main_alias_1) \
compat_symbol (libc, __libc_start_main_alias_1, __libc_start_main, GLIBC_2_0);
# else
# define DEFINE_LIBC_START_MAIN_VERSION_1
# endif
#else /* !SHARED */
/* Enable calling the function under its exported name. */
# define DEFINE_LIBC_START_MAIN_VERSION \
strong_alias (__libc_start_main_impl, __libc_start_main)
#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

8
elf/dl-init.c
View File

@ -22,10 +22,6 @@
#include <elf-initfini.h>
/* 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

14
sysdeps/aarch64/start.S
View File

@ -63,26 +63,16 @@ ENTRY(_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) */

5
sysdeps/alpha/start.S
View File

@ -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 fini. */
/* Store address of the shared library termination function. */
mov v0, a5

7
sysdeps/arc/start.S
View File

@ -49,15 +49,14 @@ ENTRY (ENTRY_POINT)
/* __libc_start_main (main, argc, argv, init, fini, rtld_fini, stack_end). */
mov_s r3, 0 /* Used to be init. */
mov r4, 0 /* Used to be fini. */
#ifdef SHARED
ld r0, [pcl, @main@gotpc]
ld r3, [pcl, @__libc_csu_init@gotpc]
ld r4, [pcl, @__libc_csu_fini@gotpc]
bl __libc_start_main@plt
#else
mov_s r0, main
mov_s r3, __libc_csu_init
mov r4, __libc_csu_fini
bl __libc_start_main
#endif

22
sysdeps/arm/start.S
View File

@ -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

17
sysdeps/csky/abiv2/start.S
View File

@ -66,13 +66,9 @@ _start:
.Lgetpc:
lrw gb, .Lgetpc@GOTPC
addu gb, t0
lrw a3, __libc_csu_fini@GOT
ldr.w a3, (gb, a3 << 0)
stw a3, (sp, 0)
lrw a3, __libc_csu_init@GOT
addu a3, gb
ldw a3, (a3, 0)
movi a3, 0 /* Used to be init. */
stw a3, (sp, 0) /* Used to be fini. */
lrw t0, main@GOT
addu t0, gb
@ -85,14 +81,9 @@ _start:
ldr.w t1, (gb, t1 << 0)
jsr t1
#else
/* Fetch address of __libc_csu_fini. */
lrw a0, __libc_csu_fini
/* Push __libc_csu_fini */
stw a0, (sp, 0)
/* Set up the other arguments in registers. */
movi a3, 0 /* Used to be init. */
stw a3, (sp, 0) /* Used to be fini. */
lrw a0, main
lrw a3, __libc_csu_init
/* Let the libc call main and exit with its return code. */
jsri __libc_start_main

6
sysdeps/generic/ldsodefs.h
View File

@ -93,6 +93,10 @@ 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. */
@ -101,7 +105,7 @@ 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

2
sysdeps/hppa/dl-lookupcfg.h
View File

@ -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); \
}

26
sysdeps/hppa/start.S
View File

@ -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) */

14
sysdeps/i386/start.S
View File

@ -87,11 +87,9 @@ ENTRY (_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. */
@ -112,9 +110,9 @@ ENTRY (_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. */

2
sysdeps/ia64/dl-lookupcfg.h
View File

@ -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); \
}

9
sysdeps/ia64/start.S
View File

@ -82,20 +82,15 @@ _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

13
sysdeps/m68k/start.S
View File

@ -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. */

1
sysdeps/mach/hurd/i386/libc.abilist
View File

@ -2203,6 +2203,7 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F

8
sysdeps/microblaze/start.S
View File

@ -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 r9,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 r9,r0,r0 /* Used to be fini. */
brid __libc_start_main
addk r10,r0,r0
#endif

18
sysdeps/mips/start.S
View File

@ -96,13 +96,13 @@ 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 /* Used to be init. */
# if _MIPS_SIM == _ABIO32
PTR_S $8, 16($29) /* fini */
PTR_S $0, 16($29) /* Used to be fini. */
PTR_S $2, 20($29) /* rtld_fini */
PTR_S $29, 24($29) /* stack_end */
# else
move $8, $0 /* Used to be fini. */
move $9, $2 /* rtld_fini */
move $10, $29 /* stack_end */
# endif
@ -143,19 +143,17 @@ 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 +163,6 @@ 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

15
sysdeps/nios2/start.S
View File

@ -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

4
sysdeps/powerpc/powerpc32/start.S
View File

@ -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"

4
sysdeps/powerpc/powerpc64/start.S
View File

@ -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))

4
sysdeps/riscv/start.S
View File

@ -54,8 +54,8 @@ 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. */
call __libc_start_main@plt

10
sysdeps/s390/s390-32/start.S
View File

@ -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

4
sysdeps/s390/s390-64/start.S
View File

@ -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

9
sysdeps/sh/start.S
View File

@ -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:

12
sysdeps/sparc/sparc32/start.S
View File

@ -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

12
sysdeps/sparc/sparc64/start.S
View File

@ -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

1
sysdeps/unix/sysv/linux/aarch64/libc.abilist
View File

@ -2171,3 +2171,4 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F

1
sysdeps/unix/sysv/linux/alpha/libc.abilist
View File

@ -2253,6 +2253,7 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.4 _IO_fprintf F
GLIBC_2.4 _IO_printf F
GLIBC_2.4 _IO_sprintf F

1
sysdeps/unix/sysv/linux/arc/libc.abilist
View File

@ -1931,3 +1931,4 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F

1
sysdeps/unix/sysv/linux/arm/be/libc.abilist
View File

@ -155,6 +155,7 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.4 _Exit F
GLIBC_2.4 _IO_2_1_stderr_ D 0xa0
GLIBC_2.4 _IO_2_1_stdin_ D 0xa0

1
sysdeps/unix/sysv/linux/arm/le/libc.abilist
View File

@ -152,6 +152,7 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.4 _Exit F
GLIBC_2.4 _IO_2_1_stderr_ D 0xa0
GLIBC_2.4 _IO_2_1_stdin_ D 0xa0

1
sysdeps/unix/sysv/linux/csky/libc.abilist
View File

@ -2115,3 +2115,4 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F

1
sysdeps/unix/sysv/linux/hppa/libc.abilist
View File

@ -2074,6 +2074,7 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F

1
sysdeps/unix/sysv/linux/i386/libc.abilist
View File

@ -2241,6 +2241,7 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F

1
sysdeps/unix/sysv/linux/ia64/libc.abilist
View File

@ -2106,6 +2106,7 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F

1
sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
View File

@ -156,6 +156,7 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.4 _Exit F
GLIBC_2.4 _IO_2_1_stderr_ D 0x98
GLIBC_2.4 _IO_2_1_stdin_ D 0x98

1
sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
View File

@ -2186,6 +2186,7 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F

1
sysdeps/unix/sysv/linux/microblaze/be/libc.abilist
View File

@ -2166,3 +2166,4 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F

1
sysdeps/unix/sysv/linux/microblaze/le/libc.abilist
View File

@ -2163,3 +2163,4 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F

1
sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
View File

@ -2157,6 +2157,7 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F

1
sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
View File

@ -2155,6 +2155,7 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F

1
sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
View File

@ -2163,6 +2163,7 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F

1
sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
View File

@ -2157,6 +2157,7 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F

1
sysdeps/unix/sysv/linux/nios2/libc.abilist
View File

@ -2204,3 +2204,4 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F

13
sysdeps/unix/sysv/linux/powerpc/libc-start.c
View File

@ -41,12 +41,12 @@ struct startup_info
};
int
__libc_start_main (int argc, char **argv,
char **ev,
ElfW (auxv_t) * auxvec,
void (*rtld_fini) (void),
struct startup_info *stinfo,
char **stack_on_entry)
__libc_start_main_impl (int argc, char **argv,
char **ev,
ElfW (auxv_t) * auxvec,
void (*rtld_fini) (void),
struct startup_info *stinfo,
char **stack_on_entry)
{
/* the PPC SVR4 ABI says that the top thing on the stack will
be a NULL pointer, so if not we assume that we're being called
@ -99,3 +99,4 @@ __libc_start_main (int argc, char **argv,
stinfo->init, stinfo->fini, rtld_fini,
stack_on_entry);
}
DEFINE_LIBC_START_MAIN_VERSION

1
sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
View File

@ -2213,6 +2213,7 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.4 _IO_fprintf F
GLIBC_2.4 _IO_printf F
GLIBC_2.4 _IO_sprintf F

1
sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
View File

@ -2246,6 +2246,7 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.4 _IO_fprintf F
GLIBC_2.4 _IO_printf F
GLIBC_2.4 _IO_sprintf F

1
sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist
View File

@ -2076,6 +2076,7 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.4 _IO_fprintf F
GLIBC_2.4 _IO_printf F
GLIBC_2.4 _IO_sprintf F

1
sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist
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@ -2366,3 +2366,4 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F

1
sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist
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@ -1933,3 +1933,4 @@ GLIBC_2.33 wprintf F
GLIBC_2.33 write F
GLIBC_2.33 writev F
GLIBC_2.33 wscanf F
GLIBC_2.34 __libc_start_main F

1
sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist
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@ -2133,3 +2133,4 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F

1
sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
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@ -2211,6 +2211,7 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.4 _IO_fprintf F
GLIBC_2.4 _IO_printf F
GLIBC_2.4 _IO_sprintf F

1
sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
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@ -2112,6 +2112,7 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.4 _IO_fprintf F
GLIBC_2.4 _IO_printf F
GLIBC_2.4 _IO_sprintf F

1
sysdeps/unix/sysv/linux/sh/be/libc.abilist
View File

@ -2081,6 +2081,7 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F

1
sysdeps/unix/sysv/linux/sh/le/libc.abilist
View File

@ -2078,6 +2078,7 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F

1
sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
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@ -2202,6 +2202,7 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.4 _IO_fprintf F
GLIBC_2.4 _IO_printf F
GLIBC_2.4 _IO_sprintf F

1
sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
View File

@ -2129,6 +2129,7 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F

1
sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
View File

@ -2088,6 +2088,7 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F

1
sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
View File

@ -2185,3 +2185,4 @@ GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F

12
sysdeps/x86_64/start.S
View File

@ -96,17 +96,13 @@ ENTRY (_start)
which grow downwards). */
pushq %rsp
#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
/* These used to be the addresses of .fini and .init. */
xorl %r8d, %r8d
xorl %ecx, %ecx
#ifdef PIC
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