1 ! crt1.s for sparc & sparcv9 (SunOS 5)
3 ! Copyright (C) 1992 Free Software Foundation, Inc.
4 ! Written By David Vinayak Henkel-Wallace, June 1992
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
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.)
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.
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.
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.
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.
43 #define STACK_BIAS 2047
46 #define setn(s, scratch, dst) setx s, scratch, dst
53 #define setn(s, scratch, dst) set s, dst
61 mov 0, %fp ! Mark bottom frame pointer
62 ldn [%sp + (16 * CPTRSIZE) + STACK_BIAS], %l0 ! argc
63 add %sp, (17 * CPTRSIZE) + STACK_BIAS, %l1 ! argv
65 ! Leave some room for a call. Sun leaves 32 octets (to sit on
66 ! a cache line?) so we do too.
73 ! %g1 may contain a function to be registered w/atexit
84 ! Now make sure constructors and destructors are handled.
91 ! We ignore the auxiliary vector; there is no defined way to
92 ! access those data anyway. Instead, go straight to main:
95 ! Skip argc words past argv, to env:
96 sll %l0, CPTRSHIFT, %o2
97 add %o2, CPTRSIZE, %o2
98 add %l1, %o2, %o2 ! env
99 setn(_environ, %o4, %o3)
100 stn %o2, [%o3] ! *_environ
107 ! We should never get here.
109 .type _start,#function
110 .size _start,.-_start