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author | Waldemar Brodkorb <wbx@openadk.org> | 2015-02-14 23:04:02 -0600 |
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committer | Waldemar Brodkorb <wbx@openadk.org> | 2015-02-14 23:04:02 -0600 |
commit | e1e46622ac0fce73d802fa4a8a2e83cc25cd9e7a (patch) | |
tree | 2c8d14e4dcc733f4227f0984ed05da5826b13acd /libpthread/linuxthreads/sysdeps/pthread/pt-initfini.c | |
parent | 6b6ede3d15f04fe825cfa9f697507457e3640344 (diff) |
Revert "resolve merge"
This reverts commit 6b6ede3d15f04fe825cfa9f697507457e3640344.
Diffstat (limited to 'libpthread/linuxthreads/sysdeps/pthread/pt-initfini.c')
-rw-r--r-- | libpthread/linuxthreads/sysdeps/pthread/pt-initfini.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/libpthread/linuxthreads/sysdeps/pthread/pt-initfini.c b/libpthread/linuxthreads/sysdeps/pthread/pt-initfini.c new file mode 100644 index 000000000..86d4c84e9 --- /dev/null +++ b/libpthread/linuxthreads/sysdeps/pthread/pt-initfini.c @@ -0,0 +1,123 @@ +/* Special .init and .fini section support. Linuxthread version. + Copyright (C) 1995, 1996, 1997, 2000, 2001 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 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.) + + 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; see the file COPYING.LIB. If not, + see <http://www.gnu.org/licenses/>. */ + +/* This file is compiled into assembly code which is then munged by a sed + script into two files: crti.s and crtn.s. + + * crti.s puts a function prologue at the beginning of the + .init and .fini sections and defines global symbols for + those addresses, so they can be called as functions. + + * crtn.s puts the corresponding function epilogues + in the .init and .fini sections. */ + +#include <stdlib.h> + +/* We use embedded asm for .section unconditionally, as this makes it + easier to insert the necessary directives into crtn.S. */ +#define SECTION(x) __asm__ (".section " x ) + +/* Embed an #include to pull in the alignment and .end directives. */ +__asm__ ("\n#include \"defs.h\""); + +/* The initial common code ends here. */ +__asm__ ("\n/*@HEADER_ENDS*/"); + +/* To determine whether we need .end and .align: */ +__asm__ ("\n/*@TESTS_BEGIN*/"); +extern void dummy (void (*foo) (void)); +void +dummy (void (*foo) (void)) +{ + if (foo) + (*foo) (); +} +__asm__ ("\n/*@TESTS_END*/"); + +/* The beginning of _init: */ +__asm__ ("\n/*@_init_PROLOG_BEGINS*/"); + +static void +call_initialize_minimal (void) +{ + extern void __pthread_initialize_minimal (void); + + __pthread_initialize_minimal (); +} + +SECTION (".init"); +extern void _init (void); +void +_init (void) +{ + /* The very first thing we must do is to set up the registers. */ + call_initialize_minimal (); + + __asm__ ("ALIGN"); + __asm__("END_INIT"); + /* Now the epilog. */ + __asm__ ("\n/*@_init_PROLOG_ENDS*/"); + __asm__ ("\n/*@_init_EPILOG_BEGINS*/"); + SECTION(".init"); +} +__asm__ ("END_INIT"); + +/* End of the _init epilog, beginning of the _fini prolog. */ +__asm__ ("\n/*@_init_EPILOG_ENDS*/"); +__asm__ ("\n/*@_fini_PROLOG_BEGINS*/"); + +SECTION (".fini"); +extern void _fini (void); +void +_fini (void) +{ + + /* End of the _fini prolog. */ + __asm__ ("ALIGN"); + __asm__ ("END_FINI"); + __asm__ ("\n/*@_fini_PROLOG_ENDS*/"); + + { + /* Let GCC know that _fini is not a leaf function by having a dummy + function call here. We arrange for this call to be omitted from + either crt file. */ + extern void i_am_not_a_leaf (void); + i_am_not_a_leaf (); + } + + /* Beginning of the _fini epilog. */ + __asm__ ("\n/*@_fini_EPILOG_BEGINS*/"); + SECTION (".fini"); +} +__asm__ ("END_FINI"); + +/* End of the _fini epilog. Any further generated assembly (e.g. .ident) + is shared between both crt files. */ +__asm__ ("\n/*@_fini_EPILOG_ENDS*/"); +__asm__ ("\n/*@TRAILER_BEGINS*/"); + +/* End of file. */ |