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Diffstat (limited to 'sysdeps/unix/bsd/ultrix4/mips/start.S')
-rw-r--r--sysdeps/unix/bsd/ultrix4/mips/start.S77
1 files changed, 77 insertions, 0 deletions
diff --git a/sysdeps/unix/bsd/ultrix4/mips/start.S b/sysdeps/unix/bsd/ultrix4/mips/start.S
new file mode 100644
index 0000000000..ec0f9d833d
--- /dev/null
+++ b/sysdeps/unix/bsd/ultrix4/mips/start.S
@@ -0,0 +1,77 @@
+/* Copyright (C) 1993, 1995 Free Software Foundation, Inc.
+ Contributed by Brendan Kehoe (brendan@zen.org).
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <sysdep.h>
+
+#ifndef HAVE_WEAK_SYMBOLS
+#define __environ environ
+#else
+weak_alias (__environ, environ)
+#endif
+
+.comm __environ, 4
+.comm errno, 4
+
+ENTRY(__start)
+ .set noreorder
+
+ /* The first thing on the stack is argc. */
+ lw s0, 0(sp)
+ nop
+
+ /* Set up the global pointer. */
+ la gp, _gp
+
+ /* Then set up argv. */
+ addiu s1, sp, 4
+
+ /* To compute where envp is, first we have to jump ahead four
+ bytes from what argv was. This will bring us ahead, so we don't
+ need to compute the NULL at the end of argv later. */
+ addiu v1, s1, 4
+
+ /* Now, compute the space to skip given the number of arguments
+ we've got. We do this by multiplying argc by 4. */
+ sll v0, s0, 2
+
+ /* Now, add (argv+4) with the space to skip...that's envp. */
+ addu s2, v1, v0
+
+ /* __environ = envp; */
+ sw s2, __environ
+
+ addiu sp, sp, -24
+
+ /* __libc_init (argc, argv, envp); */
+ move a0, s0
+ move a1, s1
+ jal __libc_init
+ move a2, s2
+
+ /* errno = 0; */
+ sw zero, errno
+
+ /* exit (main (argc, argv, envp)); */
+ move a0, s0
+ move a1, s1
+ jal main
+ move a2, s2
+
+ /* Make the value returned by main be the argument to exit. */
+ jal exit
+ move a0, v0