1 files changed, 119 insertions, 0 deletions
diff --git a/libgloss/m32c/crt0.S b/libgloss/m32c/crt0.S
new file mode 100644
index 000000000..44e9e5c35
--- /dev/null
+++ b/libgloss/m32c/crt0.S
@@ -0,0 +1,119 @@
+/*
+
+Copyright (c) 2005 Red Hat Incorporated.
+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.
+
+    The name of Red Hat Incorporated may not 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 RED HAT INCORPORATED 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. 
+
+*/
+
+#if defined(__r8c_cpu__) || defined(__m16c_cpu__)
+#define A16
+#define A(n,w) n
+#define W w
+#define ADDR .2byte
+#define ALIGN 1
+#else
+#define A24
+#define A(n,w) w
+#define W l
+#define ADDR .4byte
+#define ALIGN 2
+#endif
+
+	.text
+
+	.global _start
+_start:
+.LFB2:
+	fset	U	/* User stack */
+	ldc	#__stack,sp
+
+#ifdef A16
+	mov.b	#%hi8(__romdatastart),r1h
+	mov.w	#%lo16(__romdatastart),a0
+	mov.w	#__datastart,a1
+#else
+	mov.l	#__romdatastart,a0
+	mov.l	#__datastart,a1
+#endif
+	mov.w	#__romdatacopysize,r3
+	shl.w	#-1,r3
+	smovf.w
+
+#ifdef A16
+	mov.w	#__bssstart,a1
+#else
+	mov.l	#__bssstart,a1
+#endif
+	mov.w	#__bsssize,r3
+	shl.w	#-1,r3
+	mov.w	#0,r0
+	sstr.w
+
+	jsr.a	_main
+.LFE2:
+
+#ifdef A24
+	/* rv in r0, ok for arg0 */
+#else
+	mov.w	r0,r1
+#endif
+
+	jsr.a	_exit
+
+;;; Provide Dwarf unwinding information that will help GDB stop
+;;; backtraces at the right place.  This is stolen from assembly
+;;; code generated by GCC with -dA.
+	.section	.debug_frame,"",@progbits
+.Lframe0:
+	.4byte	.LECIE0-.LSCIE0	; Length of Common Information Entry
+.LSCIE0:
+	.4byte	0xffffffff	; CIE Identifier Tag
+	.byte	0x1	; CIE Version
+	.ascii "\0"	; CIE Augmentation
+	.uleb128 0x1	; CIE Code Alignment Factor
+	.sleb128 -1	; CIE Data Alignment Factor
+	.byte	0xd	; CIE RA Column
+	.byte	0xc	; DW_CFA_def_cfa
+	.uleb128 0xc
+	.uleb128 0x3
+	.byte	0x8d	; DW_CFA_offset, column 0xd
+	.uleb128 0x3
+	.p2align ALIGN
+.LECIE0:
+.LSFDE0:
+	.4byte	.LEFDE0-.LASFDE0	; FDE Length
+.LASFDE0:
+	.4byte	.Lframe0	; FDE CIE offset
+	ADDR	.LFB2		; FDE initial location
+	ADDR	.LFE2-.LFB2	; FDE address range
+	.byte   0xf     	; DW_CFA_def_cfa_expression
+	.uleb128 1		; length of expression
+	.byte 	0x30		; DW_OP_lit0
+	.p2align ALIGN
+.LEFDE0:
+.text