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authorEric Andersen <andersen@codepoet.org>2001-01-12 10:16:05 +0000
committerEric Andersen <andersen@codepoet.org>2001-01-12 10:16:05 +0000
commit77879554671206102471bb282accb3251395d151 (patch)
tree4bc8854140028577b324e3ddaf05d043744618a3 /libc/sysdeps/linux/m68k/crt0.S
parente4492b9c21b645018b2d7702665be8c1eb4a1b5c (diff)
Thanks to James Graves <jgraves@deltamobile.com>, we now have
a first pass at getting m68k working. It may have some problems, but should now be fairly close.
Diffstat (limited to 'libc/sysdeps/linux/m68k/crt0.S')
-rw-r--r--libc/sysdeps/linux/m68k/crt0.S75
1 files changed, 75 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/m68k/crt0.S b/libc/sysdeps/linux/m68k/crt0.S
new file mode 100644
index 000000000..1c64ea960
--- /dev/null
+++ b/libc/sysdeps/linux/m68k/crt0.S
@@ -0,0 +1,75 @@
+/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
+
+This file is part of the GNU C Library.
+
+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. */
+
+ .global _start
+ .global __main
+ .global _end
+/* .global __data_start */
+
+ .bss
+ .global environ
+environ:
+ .long 0
+
+ .text
+_start: /* renamed from __start */
+ nop
+ nop
+
+ movea.l %d5, %a5
+
+ lea __bss_start(%a5), %a0
+ lea end(%a5), %a1
+
+ /* Copy 0 to %a0 until %a0 == %a1 */
+ /*
+ From my understanding of linux/fs/binfmt_flat.c for uClinux,
+ this is not necessary anymore. The loader will clear out
+ the BSS for us. - jgraves@deltamobile.com
+
+L1:
+ movel #0, %a0@+
+ cmpal %a0, %a1
+ bhi L1
+ */
+
+ move.l 8(%sp), %d5
+ move.l %d5, environ(%a5)
+
+ bsr main
+
+ move.l %d0,%sp@-
+ bsr exit /* Invoke exit() routine */
+
+#ifdef NO_LIBGCC
+ /* If that didn't kill us, ... */
+_exit:
+ move.l %sp@+,%d1
+ moveq #1,%d0 /* SYS_exit */
+ trap #0
+
+__main:
+ rts
+#else
+
+ .global _cleanup
+_cleanup:
+ rts /* nothing to clean up */
+
+#endif /* NO_LIBGCC */