83 lines
2.8 KiB
C
83 lines
2.8 KiB
C
/* Define the machine-dependent type `jmp_buf'. Alpha version.
|
|
Copyright (C) 1992, 1997 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 _SETJMP_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
|