/* 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