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/* Define the machine-dependent type `jmp_buf'. Alpha version.
Copyright (C) 1992,1997,2003,2005,2006 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., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifndef _BITS_SETJMP_H
#define _BITS_SETJMP_H 1
#if !defined _SETJMP_H && !defined _PTHREAD_H
# error "Never include <bits/setjmp.h> directly; use <setjmp.h> instead."
#endif
/* The previous bits/setjmp.h had __jmp_buf defined as a structure.
We use an array of 'long int' instead, to make writing the
assembler easier. Naturally, user code should not depend on
either representation. */
/*
* Integer registers:
* $0 is the return value (va);
* $1-$8, $22-$25, $28 are call-used (t0-t7, t8-t11, at);
* $9-$14 we save here (s0-s5);
* $15 is the FP and we save it here (fp or s6);
* $16-$21 are input arguments (call-used) (a0-a5);
* $26 is the return PC and we save it here (ra);
* $27 is the procedure value (i.e., the address of __setjmp) (pv or t12);
* $29 is the global pointer, which the caller will reconstruct
* from the return address restored in $26 (gp);
* $30 is the stack pointer and we save it here (sp);
* $31 is always zero (zero).
*
* Floating-point registers:
* $f0 is the floating return value;
* $f1, $f10-$f15, $f22-$f30 are call-used;
* $f2-$f9 we save here;
* $f16-$21 are input args (call-used);
* $f31 is always zero.
*
* Note that even on Alpha hardware that does not have an FPU (there
* isn't such a thing currently) it is required to implement the FP
* registers.
*/
#if defined __USE_MISC || defined __ASSEMBLY__
# define JB_S0 0
# define JB_S1 1
# define JB_S2 2
# define JB_S3 3
# define JB_S4 4
# define JB_S5 5
# define JB_PC 6
# define JB_FP 7
# define JB_SP 8
# define JB_F2 9
# define JB_F3 10
# define JB_F4 11
# define JB_F5 12
# define JB_F6 13
# define JB_F7 14
# define JB_F8 15
# define JB_F9 16
#endif
#ifndef __ASSEMBLY__
typedef long int __jmp_buf[17];
/* 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
#endif /* bits/setjmp.h */
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