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| -rw-r--r-- | linuxthreads/sysdeps/alpha/elf/pt-initfini.c | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/linuxthreads/sysdeps/alpha/elf/pt-initfini.c b/linuxthreads/sysdeps/alpha/elf/pt-initfini.c new file mode 100644 index 0000000000..16273f3467 --- /dev/null +++ b/linuxthreads/sysdeps/alpha/elf/pt-initfini.c @@ -0,0 +1,96 @@ +/* Special .init and .fini section support for Alpha. Linuxthreads version. + Copyright (C) 2002 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +/* 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__ (" + +#include \"defs.h\" + +/*@HEADER_ENDS*/ + +/*@_init_PROLOG_BEGINS*/ + .section .init, \"ax\", @progbits + .globl _init + .ent _init +_init: + ldgp $29, 0($27) + subq $30, 16, $30 + lda $27, __pthread_initialize_minimal + stq $26, 0($30) + stq $29, 8($30) + .prologue 1 + jsr $26, ($27), __pthread_initialize_minimal + ldq $29, 8($30) + .align 3 + .end _init + .size _init, 0 +/*@_init_PROLOG_ENDS*/ + +/*@_init_EPILOG_BEGINS*/ + .section .init, \"ax\", @progbits + ldq $26, 0($30) + ldq $29, 8($30) + addq $30, 16, $30 + ret +/*@_init_EPILOG_ENDS*/ + +/*@_fini_PROLOG_BEGINS*/ + .section .fini, \"ax\", @progbits + .globl _fini + .ent _fini +_fini: + ldgp $29, 0($27) + subq $30, 16, $30 + stq $26, 0($30) + stq $29, 8($30) + .prologue 1 + .align 3 + .end _fini + .size _fini, 0 +/*@_fini_PROLOG_ENDS*/ + +/*@_fini_EPILOG_BEGINS*/ + .section .fini, \"ax\", @progbits + ldq $26, 0($30) + ldq $29, 8($30) + addq $30, 16, $30 + ret +/*@_fini_EPILOG_ENDS*/ + +/*@TRAILER_BEGINS*/ +"); |