sdcc-3.9.0 fork implementing GNU assembler syntax

This fork aims to provide better support for stm8-binutils

1 files changed, 58 insertions, 0 deletions

diff --git a/device/lib/mcs51/crtxstack.asm b/device/lib/mcs51/crtxstack.asm
new file mode 100644
index 0000000..a74178e
--- /dev/null
+++ b/device/lib/mcs51/crtxstack.asm
@@ -0,0 +1,58 @@
+;--------------------------------------------------------------------------
+;  crtxstack.asm - C run-time: setup xstack
+;
+;  Copyright (C) 2004, Erik Petrich
+;
+;  This library is free software; you can redistribute it and/or modify it
+;  under the terms of the GNU General Public License as published by the
+;  Free Software Foundation; either version 2, or (at your option) any
+;  later version.
+;
+;  This 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 General Public License for more details.
+;
+;  You should have received a copy of the GNU General Public License 
+;  along with this library; see the file COPYING. If not, write to the
+;  Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
+;   MA 02110-1301, USA.
+;
+;  As a special exception, if you link this library with other files,
+;  some of which are compiled with SDCC, to produce an executable,
+;  this library does not by itself cause the resulting executable to
+;  be covered by the GNU General Public License. This exception does
+;  not however invalidate any other reasons why the executable file
+;  might be covered by the GNU General Public License.
+;--------------------------------------------------------------------------
+
+	.area CSEG    (CODE)
+	.area GSINIT0 (CODE)
+	.area GSINIT1 (CODE)
+	.area GSINIT2 (CODE)
+	.area GSINIT3 (CODE)
+	.area GSINIT4 (CODE)
+	.area GSINIT5 (CODE)
+	.area GSINIT  (CODE)
+	.area GSFINAL (CODE)
+
+	.globl __start__xstack
+	.globl __XPAGE
+
+	.area GSINIT1 (CODE)
+
+__sdcc_init_xstack::
+
+; Need to initialize in GSINIT1 in case the user's __sdcc_external_startup
+; uses the xstack.
+	
+	mov	__XPAGE,#(__start__xstack >> 8)
+	mov	_spx,#__start__xstack
+
+	.area GSINIT5 (CODE)
+
+; Need to initialize in GSINIT5 because __mcs51_genXINIT modifies __XPAGE
+; and __mcs51_genRAMCLEAR modifies _spx.
+	
+	mov	__XPAGE,#(__start__xstack >> 8)
+	mov	_spx,#__start__xstack