From 124ec188720b6bdea85ade49e7ea195161b12fce Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Sat, 5 Jan 2008 10:05:27 +0000 Subject: Chris Zankel writes: The following patches add support for the Xtensa processor architecture to uClibc. They are based on a recent SVN checkout (12/05/2007). The first patch (attached to this post) adds Xtensa support to various shared configuration and make files. The following patches then include the Xtensa specific files and directories. I welcome any feedback and would appreciate it if you could include the patches into the mainline tree. I am certainly committed to maintain the port. Bob Wilson was kind enough to review the patches. Some notes about the architecture: Xtensa is a configurable and extensible processor architecture developed by Tensilica. For more information, please visit: www.linux-xtensa.org. --- libc/sysdeps/linux/xtensa/bits/setjmp.h | 46 +++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 libc/sysdeps/linux/xtensa/bits/setjmp.h (limited to 'libc/sysdeps/linux/xtensa/bits/setjmp.h') diff --git a/libc/sysdeps/linux/xtensa/bits/setjmp.h b/libc/sysdeps/linux/xtensa/bits/setjmp.h new file mode 100644 index 000000000..1bc4896c8 --- /dev/null +++ b/libc/sysdeps/linux/xtensa/bits/setjmp.h @@ -0,0 +1,46 @@ +/* Copyright (C) 1997, 1998, 2007 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. + + 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., 51 Franklin Street - Fifth Floor, + Boston, MA 02110-1301, USA. */ + +/* Define the machine-dependent type `jmp_buf'. Xtensa version. */ +#ifndef _BITS_SETJMP_H +#define _BITS_SETJMP_H 1 + +#if !defined _SETJMP_H && !defined _PTHREAD_H +# error "Never include directly; use instead." +#endif + +/* The jmp_buf structure for Xtensa holds the following (where "proc" + is the procedure that calls setjmp): 4-12 registers from the window + of proc, the 4 words from the save area at proc's $sp (in case a + subsequent alloca in proc moves $sp), and the return address within + proc. Everything else is saved on the stack in the normal save areas. */ + +#ifndef _ASM +typedef int __jmp_buf[17]; +#endif + +#define JB_SP 1 +#define JB_PC 16 + +/* Test if longjmp to JMPBUF would unwind the frame containing a local + variable at ADDRESS. */ + +#define _JMPBUF_UNWINDS(jmpbuf, address) \ + ((void *) (address) < (void *) (jmpbuf)[JB_SP]) + +#endif /* bits/setjmp.h */ -- cgit v1.2.3