From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- gcc/config/mmix/crti.asm | 116 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 116 insertions(+) create mode 100644 gcc/config/mmix/crti.asm (limited to 'gcc/config/mmix/crti.asm') diff --git a/gcc/config/mmix/crti.asm b/gcc/config/mmix/crti.asm new file mode 100644 index 000000000..f5f4c5d68 --- /dev/null +++ b/gcc/config/mmix/crti.asm @@ -0,0 +1,116 @@ +/* Copyright (C) 2001, 2002 Free Software Foundation, Inc. + Contributed by Hans-Peter Nilsson + +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 +. */ + +% This is the crt0 equivalent for mmix-knuth-mmixware, for setting up +% things for compiler-generated assembly-code and for setting up things +% between where the simulator calls and main, and shutting things down on +% the way back. There's an actual crt0.o elsewhere, but that's a dummy. + +% This file and the GCC output are supposed to be *reasonably* +% mmixal-compatible to enable people to re-use output with Knuth's mmixal. +% However, forward references are used more freely: we are using the +% binutils tools. Users of mmixal beware; you will sometimes have to +% re-order things or use temporary variables. + +% Users of mmixal will want to set up 8H and 9H to be .text and .data +% respectively, so the compiler can switch between them pretending they're +% segments. + +% This little treasure is here so the 32 lowest address bits of user data +% will not be zero. Because of truncation, that would cause testcase +% gcc.c-torture/execute/980701-1.c to incorrectly fail. + + .data ! mmixal:= 8H LOC Data_Segment + .p2align 3 + LOC @+(8-@)@7 + OCTA 2009 + + .text ! mmixal:= 9H LOC 8B; LOC #100 + .global Main + +% The __Stack_start symbol is provided by the link script. +stackpp OCTA __Stack_start + +% "Main" is the magic symbol the simulator jumps to. We want to go +% on to "main". +% We need to set rG explicitly to avoid hard-to-debug situations. +Main SETL $255,32 + PUT rG,$255 + +% Initialize the stack pointer. It is supposedly made a global +% zero-initialized (allowed to change) register in crtn.asm; we use the +% explicit number. + GETA $255,stackpp + LDOU $254,$255,0 + +% Make sure we get more than one mem, to simplify counting cycles. + LDBU $255,$1,0 + LDBU $255,$1,1 + + PUSHJ $2,_init + +#ifdef __MMIX_ABI_GNU__ +% Copy argc and argv from their initial position to argument registers +% where necessary. + SET $231,$0 + SET $232,$1 +#else +% For the mmixware ABI, we need to move arguments. The return value will +% appear in $0. + SET $2,$1 + SET $1,$0 +#endif + + PUSHJ $0,main + JMP exit + +% Provide the first part of _init and _fini. Save the return address on the +% register stack. We eventually ignore the return address of these +% PUSHJ:s, so it doesn't matter that whether .init and .fini code calls +% functions or where they store rJ. We shouldn't get there, so die +% (TRAP Halt) if that happens. + + .section .init,"ax",@progbits + .global _init +_init: + GET $0,:rJ + PUSHJ $1,0F + SETL $255,255 + TRAP 0,0,0 +0H IS @ + +% Register _fini to be executed as the last atexit function. +#ifdef __MMIX_ABI_GNU__ + GETA $231,_fini +#else + GETA $1,_fini +#endif + PUSHJ $0,atexit + + .section .fini,"ax",@progbits + .global _fini +_fini: + GET $0,:rJ + PUSHJ $1,0F + SETL $255,255 + TRAP 0,0,0 +0H IS @ -- cgit v1.2.3