1! gcrt1.s for solaris 2.0. 2 3! Copyright (C) 1992 Free Software Foundation, Inc. 4! Written By David Vinayak Henkel-Wallace, June 1992 5! 6! This file is free software; you can redistribute it and/or modify it 7! under the terms of the GNU General Public License as published by the 8! Free Software Foundation; either version 2, or (at your option) any 9! later version. 10! 11! In addition to the permissions in the GNU General Public License, the 12! Free Software Foundation gives you unlimited permission to link the 13! compiled version of this file with other programs, and to distribute 14! those programs without any restriction coming from the use of this 15! file. (The General Public License restrictions do apply in other 16! respects; for example, they cover modification of the file, and 17! distribution when not linked into another program.) 18! 19! This file is distributed in the hope that it will be useful, but 20! WITHOUT ANY WARRANTY; without even the implied warranty of 21! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 22! General Public License for more details. 23! 24! You should have received a copy of the GNU General Public License 25! along with this program; see the file COPYING. If not, write to 26! the Free Software Foundation, 59 Temple Place - Suite 330, 27! Boston, MA 02111-1307, USA. 28! 29! As a special exception, if you link this library with files 30! compiled with GCC to produce an executable, this does not cause 31! the resulting executable to be covered by the GNU General Public License. 32! This exception does not however invalidate any other reasons why 33! the executable file might be covered by the GNU General Public License. 34! 35 36! This file takes control of the process from the kernel, as specified 37! in section 3 of the SVr4 ABI. 38! This file is the first thing linked into any executable. 39 40 .section ".text" 41 .proc 022 42 .global _start 43 44_start: 45 mov 0, %fp ! Mark bottom frame pointer 46 ld [%sp + 64], %l0 ! argc 47 add %sp, 68, %l1 ! argv 48 49 ! Leave some room for a call. Sun leaves 32 octets (to sit on 50 ! a cache line?) so we do too. 51 sub %sp, 32, %sp 52 53 ! %g1 may contain a function to be registered w/atexit 54 orcc %g0, %g1, %g0 55 be .nope 56 mov %g1, %o0 57 call atexit 58 nop 59.nope: 60 ! Now make sure constructors and destructors are handled. 61 set _fini, %o0 62 call atexit, 1 63 nop 64 call _init, 0 65 nop 66 67 ! We ignore the auxiliary vector; there's no defined way to 68 ! access those data anyway. Instead, go straight to main: 69 mov %l0, %o0 ! argc 70 mov %l1, %o1 ! argv 71 set ___Argv, %o3 72 st %o1, [%o3] ! *___Argv 73 ! Skip argc words past argv, to env: 74 sll %l0, 2, %o2 75 add %o2, 4, %o2 76 add %l1, %o2, %o2 ! env 77 set _environ, %o3 78 st %o2, [%o3] ! *_environ 79 call main, 4 80 nop 81 call exit, 0 82 nop 83 call _exit, 0 84 nop 85 ! We should never get here. 86 87 .type _start,#function 88 .size _start,.-_start 89