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Diffstat (limited to 'libgcc/config/mmix/crtn.S')
| -rw-r--r-- | libgcc/config/mmix/crtn.S | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/libgcc/config/mmix/crtn.S b/libgcc/config/mmix/crtn.S new file mode 100644 index 00000000000..c109e54db01 --- /dev/null +++ b/libgcc/config/mmix/crtn.S @@ -0,0 +1,87 @@ +/* Copyright (C) 2001, 2002, 2009 Free Software Foundation, Inc. + Contributed by Hans-Peter Nilsson <hp@bitrange.com> + +This file is free software; you can redistribute it and/or modify it +under the terms of the GNU General Public License as published by the +Free Software Foundation; either version 3, or (at your option) any +later version. + +This file 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 +General Public License for more details. + +Under Section 7 of GPL version 3, you are granted additional +permissions described in the GCC Runtime Library Exception, version +3.1, as published by the Free Software Foundation. + +You should have received a copy of the GNU General Public License and +a copy of the GCC Runtime Library Exception along with this program; +see the files COPYING3 and COPYING.RUNTIME respectively. If not, see +<http://www.gnu.org/licenses/>. */ + +% This must be the last file on the link-line, allocating global registers +% from the top. + +% Register $254 is the stack-pointer. +sp GREG + +% Register $253 is frame-pointer. It's not supposed to be used in most +% functions. +fp GREG + +% $252 is the static chain register; nested functions receive the +% context of the surrounding function through a pointer passed in this +% register. +static_chain GREG +struct_value_reg GREG + +% These registers are used to pass state at an exceptional return (C++). +eh_state_3 GREG +eh_state_2 GREG +eh_state_1 GREG +eh_state_0 GREG + +#ifdef __MMIX_ABI_GNU__ + +% Allocate global registers used by the GNU ABI. +gnu_parm_reg_16 GREG +gnu_parm_reg_15 GREG +gnu_parm_reg_14 GREG +gnu_parm_reg_13 GREG +gnu_parm_reg_12 GREG +gnu_parm_reg_11 GREG +gnu_parm_reg_10 GREG +gnu_parm_reg_9 GREG +gnu_parm_reg_8 GREG +gnu_parm_reg_7 GREG +gnu_parm_reg_6 GREG +gnu_parm_reg_5 GREG +gnu_parm_reg_4 GREG +gnu_parm_reg_3 GREG +gnu_parm_reg_2 GREG +gnu_parm_reg_1 GREG + +#endif /* __MMIX_ABI_GNU__ */ + +% Provide last part of _init and _fini. + +% The return address is stored in the topmost stored register in the +% register-stack. We ignore the current value in rJ. It is probably +% garbage because each fragment of _init and _fini may have their own idea +% of the current stack frame, if they're cut out from a "real" function +% like in gcc/crtstuff.c. + + .section .init,"ax",@progbits + GETA $255,0F + PUT rJ,$255 + POP 0,0 +0H PUT rJ,$0 + POP 0,0 + + .section .fini,"ax",@progbits + GETA $255,0F + PUT rJ,$255 + POP 0,0 +0H PUT rJ,$0 + POP 0,0 |