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Diffstat (limited to 'sysdeps/alpha/bits/setjmp.h')
| -rw-r--r-- | sysdeps/alpha/bits/setjmp.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/sysdeps/alpha/bits/setjmp.h b/sysdeps/alpha/bits/setjmp.h new file mode 100644 index 0000000000..d92e6f866d --- /dev/null +++ b/sysdeps/alpha/bits/setjmp.h @@ -0,0 +1,61 @@ +/* Define the machine-dependent type `jmp_buf'. Alpha version. + Copyright (C) 1992-2014 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, see + <http://www.gnu.org/licenses/>. */ + +#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. + */ + +#ifndef __ASSEMBLY__ +typedef long int __jmp_buf[17]; +#endif + +#endif /* bits/setjmp.h */ |