diff options
Diffstat (limited to 'libpthread/linuxthreads/sysdeps/alpha/elf')
| -rw-r--r-- | libpthread/linuxthreads/sysdeps/alpha/elf/pt-initfini.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/libpthread/linuxthreads/sysdeps/alpha/elf/pt-initfini.c b/libpthread/linuxthreads/sysdeps/alpha/elf/pt-initfini.c new file mode 100644 index 000000000..6cdc69d58 --- /dev/null +++ b/libpthread/linuxthreads/sysdeps/alpha/elf/pt-initfini.c @@ -0,0 +1,89 @@ +/* Special .init and .fini section support for Alpha. Linuxthreads version. + Copyright (C) 2002, 2003 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. + + 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 + <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. + + This differs from what would be generated by the generic code in that + we save and restore the GP within the function. In order for linker + relaxation to work, the value in the GP register on exit from a function + must be valid for the function entry point. Normally, a function is + contained within one object file and this is not an issue, provided + that the function reloads the gp after making any function calls. + However, _init and _fini are constructed from pieces of many object + files, all of which may have different GP values. So we must reload + the GP value from crti.o in crtn.o. */ + +__asm__ (" \n\ +#include \"defs.h\" \n\ + \n\ +/*@HEADER_ENDS*/ \n\ + \n\ +/*@_init_PROLOG_BEGINS*/ \n\ + .section .init, \"ax\", @progbits \n\ + .globl _init \n\ + .type _init,@function \n\ + .usepv _init,std \n\ +_init: \n\ + ldgp $29, 0($27) \n\ + subq $30, 16, $30 \n\ + stq $26, 0($30) \n\ + stq $29, 8($30) \n\ + jsr $26, __pthread_initialize_minimal \n\ + ldq $29, 8($30) \n\ + .align 3 \n\ +/*@_init_PROLOG_ENDS*/ \n\ + \n\ +/*@_init_EPILOG_BEGINS*/ \n\ + .section .init, \"ax\", @progbits \n\ + ldq $26, 0($30) \n\ + ldq $29, 8($30) \n\ + addq $30, 16, $30 \n\ + ret \n\ +/*@_init_EPILOG_ENDS*/ \n\ + \n\ +/*@_fini_PROLOG_BEGINS*/ \n\ + .section .fini, \"ax\", @progbits \n\ + .globl _fini \n\ + .type _fini,@function \n\ + .usepv _fini,std \n\ +_fini: \n\ + ldgp $29, 0($27) \n\ + subq $30, 16, $30 \n\ + stq $26, 0($30) \n\ + stq $29, 8($30) \n\ + .align 3 \n\ +/*@_fini_PROLOG_ENDS*/ \n\ + \n\ +/*@_fini_EPILOG_BEGINS*/ \n\ + .section .fini, \"ax\", @progbits \n\ + ldq $26, 0($30) \n\ + ldq $29, 8($30) \n\ + addq $30, 16, $30 \n\ + ret \n\ +/*@_fini_EPILOG_ENDS*/ \n\ + \n\ +/*@TRAILER_BEGINS*/ \n\ +"); |