update to new uClibc startup style

2 files changed, 108 insertions, 72 deletions

diff --git a/libc/sysdeps/linux/m68k/crt0.S b/libc/sysdeps/linux/m68k/crt0.S
deleted file mode 100644
index 44aca7fd1..000000000
--- a/libc/sysdeps/linux/m68k/crt0.S
+++ /dev/null
@@ -1,72 +0,0 @@
-/* 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.  */
-
-/*
- *	NOTE: this file works for PIC and non-PIC code.  Be very careful how
- *	you modify it !
- */
-
-#include <features.h>
-
-	.global	_start
-	.global __exit
-	.global atexit
-	.global main
-
-	.text
-
-	nop
-	nop
-_start: /* put here so that references to _start work with elf-PIC */
-
-	movea.l %d5, %a5	/* uClinux passes in data segment here */
-/*
- *	argc, argv and envp are on the stack,  just call to main
- */
-	lea __uClibc_main-.-8, %a0	/* call uClibc main */
-	jsr %pc@(%a0)
-
-	/* If that didn't kill us, ... */
-__exit:
-	move.l %sp@+,%d1
-	moveq #1,%d0 /* __NR_exit */
-	trap #0
-
-/*
- *	this was needed for gcc/g++-builds,  atexit was not getting included
- *	for some stupid reason,  this gets us a compiler
- */
-empty_func:
-	rts
-#if defined(__HAVE_ELF__)
-	.weak atexit
-	atexit = empty_func
-#else
-	.set atexit,empty_func
-#endif
-
-
-/* Define a symbol for the first piece of initialized data.  */
-	.data
-	.globl __data_start
-__data_start:
-	.long 0
-	.weak data_start
-	data_start = __data_start
-
diff --git a/libc/sysdeps/linux/m68k/crt1.S b/libc/sysdeps/linux/m68k/crt1.S
new file mode 100644
index 000000000..ee25e48eb
--- /dev/null
+++ b/libc/sysdeps/linux/m68k/crt1.S
@@ -0,0 +1,108 @@
+/* Startup code compliant to the ELF m68k ABI.
+   Copyright (C) 1996, 1997, 1998, 2001, 2002 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   In addition to the permissions in the GNU Lesser General Public
+   License, the Free Software Foundation gives you unlimited
+   permission to link the compiled version of this file with other
+   programs, and to distribute those programs without any restriction
+   coming from the use of this file. (The GNU Lesser General Public
+   License restrictions do apply in other respects; for example, they
+   cover modification of the file, and distribution when not linked
+   into another program.)
+
+   Note that people who make modified versions of this file are not
+   obligated to grant this special exception for their modified
+   versions; it is their choice whether to do so. The GNU Lesser
+   General Public License gives permission to release a modified
+   version without this exception; this exception also makes it
+   possible to release a modified version which carries forward this
+   exception.
+
+   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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+/* This is the canonical entry point, usually the first thing in the text
+   segment.  The SVR4/m68k ABI says that when the entry point runs,
+   most registers' values are unspecified, except for:
+
+   %a1		Contains a function pointer to be registered with `atexit'.
+		This is how the dynamic linker arranges to have DT_FINI
+		functions called for shared libraries that have been loaded
+		before this code runs.
+
+   %sp		The stack contains the arguments and environment:
+		0(%sp)			argc
+		4(%sp)			argv[0]
+		...
+		(4*argc)(%sp)		NULL
+		(4*(argc+1))(%sp)	envp[0]
+		...
+					NULL
+*/
+
+#include <features.h>
+
+	.text
+	.type	_init,%function
+	.type	_fini,%function
+#ifndef __UCLIBC_CTOR_DTOR__
+	.weak	_init
+	.weak	_fini
+#endif
+	.globl _start
+	.type _start,@function
+_start:
+	/* Clear the frame pointer.  The ABI suggests this be done, to mark
+	   the outermost frame obviously.  */
+	sub.l %fp, %fp
+
+	/* Extract the arguments as encoded on the stack and set up the
+	   arguments for `main': argc, argv.  envp will be determined
+	   later in __libc_start_main.  */
+	move.l (%sp)+, %d0	/* Pop the argument count.  */
+	move.l %sp, %a0		/* The argument vector starts just at the
+				   current stack top.  */
+
+	/* Provide the highest stack address to the user code (for stacks
+	   which grow downward).  */
+	pea (%sp)
+
+	pea (%a1)		/* Push address of the shared library
+				   termination function.  */
+
+	/* Push the address of our own entry points to `.fini' and
+	   `.init'.  */
+	pea _fini
+	pea _init
+
+	pea (%a0)		/* Push second argument: argv.  */
+	move.l %d0, -(%sp)	/* Push first argument: argc.  */
+
+	pea main
+
+	/* Call the user's main function, and exit with its value.  But
+	   let the libc call main.  */
+	jbsr __uClibc_main
+
+	illegal			/* Crash if somehow `exit' does return.  */
+
+/* Define a symbol for the first piece of initialized data.  */
+	.data
+	.globl __data_start
+__data_start:
+	.long 0
+	.weak data_start
+	data_start = __data_start