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) \
# 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))
# New special glibc functions.
gnu_get_libc_release; gnu_get_libc_version;
}
+ GLIBC_2.34 {
+ __libc_start_main;
+ }
GLIBC_PRIVATE {
errno;
}
+++ /dev/null
-/* 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
-}
-/* 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
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>
#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>
# 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
# 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 **
__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,
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
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. */
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
#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)
{
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);
}
}
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
# 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) */
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
/* __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
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. */
.align 2
.L_GOT:
.word _GLOBAL_OFFSET_TABLE_ - .L_GOT
- .word __libc_csu_fini(GOT)
- .word __libc_csu_init(GOT)
.word main(GOT)
#endif
.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
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
: (__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. */
(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
{ \
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); \
}
.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
.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
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 */
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
/* 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) */
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. */
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. */
{ \
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); \
}
{
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
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. */
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. */
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
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
# 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
/* 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(). */
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
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)
-
- /* 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 fini. */
+ stw zero, 0(sp)
+
+ /* Used to be init. */
+ mov r7, zero
/* r6 == argv */
addi r6, sp, 16
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"
.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))
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
*/
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
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
*/
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
/* 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) */
.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:
/* 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
/* 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
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
+GLIBC_2.34 __libc_start_main 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
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
+GLIBC_2.34 __libc_start_main 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
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
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
+GLIBC_2.34 __libc_start_main 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
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
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
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
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
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
+GLIBC_2.34 __libc_start_main F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
+GLIBC_2.34 __libc_start_main F
GLIBC_2.33 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
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
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
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
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
+GLIBC_2.34 __libc_start_main F
};
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
stinfo->init, stinfo->fini, rtld_fini,
stack_on_entry);
}
+DEFINE_LIBC_START_MAIN_VERSION
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
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
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
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
+GLIBC_2.34 __libc_start_main F
GLIBC_2.33 write F
GLIBC_2.33 writev F
GLIBC_2.33 wscanf F
+GLIBC_2.34 __libc_start_main F
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
+GLIBC_2.34 __libc_start_main F
GLIBC_2.33 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
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
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
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
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
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
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
GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
+GLIBC_2.34 __libc_start_main F
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
projects / thirdparty / glibc.git / commitdiff
