custom crt, remove tiny85flashinit, UNTESTED

1 files changed, 102 insertions, 0 deletions

diff --git a/firmware/crt1.S b/firmware/crt1.S
new file mode 100644
index 0000000..bb7b8e0
--- /dev/null
+++ b/firmware/crt1.S
@@ -0,0 +1,102 @@
+
+/* Copyright (c) 2002, Marek Michalkiewicz <marekm@amelek.gda.pl>
+   Copyright (c) 2007, 2008 Eric B. Weddington
+   All rights reserved.
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions are met:
+
+   * Redistributions of source code must retain the above copyright
+     notice, this list of conditions and the following disclaimer.
+
+   * Redistributions in binary form must reproduce the above copyright
+     notice, this list of conditions and the following disclaimer in
+     the documentation and/or other materials provided with the
+     distribution.
+
+   * Neither the name of the copyright holders nor the names of
+     contributors may be used to endorse or promote products derived
+     from this software without specific prior written permission.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+   POSSIBILITY OF SUCH DAMAGE. */
+
+/* $Id$ */
+
+#if (__GNUC__ < 3) || (__GNUC__ == 3 && __GNUC_MINOR__ < 3)
+#error "GCC version >= 3.3 required"
+#endif
+/*
+#include IOSYMFILE
+
+#include "macros.inc"
+*/
+
+  #define XJMP rjmp
+  #define XCALL rcall
+  
+	.macro	vector name
+	.weak	\name
+	.set	\name, __init
+	XJMP	\name
+	.endm
+
+	.section .vectors,"ax",@progbits
+	.global	__vectors
+	.global	__bad_interrupt
+	.func	__vectors
+__bad_interrupt:	
+__vectors:
+	XJMP	__init
+	vector	__vector_1
+	vector	__vector_2
+	vector	__vector_3
+	.endfunc
+
+	/* Handle unexpected interrupts (enabled and no handler), which
+	   usually indicate a bug.  Jump to the __vector_default function
+	   if defined by the user, otherwise jump to the reset address.
+
+	   This must be in a different section, otherwise the assembler
+	   will resolve "rjmp" offsets and there will be no relocs.  */
+
+	.section .init0,"ax",@progbits
+	.weak	__init
+;	.func	__init
+__init:
+
+	.weak	__stack
+
+	/* By default, malloc() uses the current value of the stack pointer
+	   minus __malloc_margin as the highest available address.
+
+	   In some applications with external SRAM, the stack can be below
+	   the data section (in the internal SRAM - faster), and __heap_end
+	   should be set to the highest address available for malloc().  */
+	.weak	__heap_end
+	.set	__heap_end, 0
+
+	.section .init2,"ax",@progbits
+	clr		R1
+	out		0x3f,r1
+
+	.section .init9,"ax",@progbits
+	XJMP	main
+;	.endfunc
+
+
+	.section .zerotable,"ax",@progbits
+zerovectors:
+	XJMP	__init
+	XJMP	__vector_1
+	XJMP	__vector_2
+	XJMP	__vector_3