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| 1 | /* Define the machine-dependent type `jmp_buf'. Alpha version. |
|---|---|
| 2 | Copyright (C) 1992-2022 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library. If not, see |
| 17 | <https://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #ifndef _BITS_SETJMP_H |
| 20 | #define _BITS_SETJMP_H 1 |
| 21 | |
| 22 | #if !defined _SETJMP_H && !defined _PTHREAD_H |
| 23 | # error "Never include <bits/setjmp.h> directly; use <setjmp.h> instead." |
| 24 | #endif |
| 25 | |
| 26 | /* The previous bits/setjmp.h had __jmp_buf defined as a structure. |
| 27 | We use an array of 'long int' instead, to make writing the |
| 28 | assembler easier. Naturally, user code should not depend on |
| 29 | either representation. */ |
| 30 | |
| 31 | /* |
| 32 | * Integer registers: |
| 33 | * $0 is the return value (va); |
| 34 | * $1-$8, $22-$25, $28 are call-used (t0-t7, t8-t11, at); |
| 35 | * $9-$14 we save here (s0-s5); |
| 36 | * $15 is the FP and we save it here (fp or s6); |
| 37 | * $16-$21 are input arguments (call-used) (a0-a5); |
| 38 | * $26 is the return PC and we save it here (ra); |
| 39 | * $27 is the procedure value (i.e., the address of __setjmp) (pv or t12); |
| 40 | * $29 is the global pointer, which the caller will reconstruct |
| 41 | * from the return address restored in $26 (gp); |
| 42 | * $30 is the stack pointer and we save it here (sp); |
| 43 | * $31 is always zero (zero). |
| 44 | * |
| 45 | * Floating-point registers: |
| 46 | * $f0 is the floating return value; |
| 47 | * $f1, $f10-$f15, $f22-$f30 are call-used; |
| 48 | * $f2-$f9 we save here; |
| 49 | * $f16-$21 are input args (call-used); |
| 50 | * $f31 is always zero. |
| 51 | * |
| 52 | * Note that even on Alpha hardware that does not have an FPU (there |
| 53 | * isn't such a thing currently) it is required to implement the FP |
| 54 | * registers. |
| 55 | */ |
| 56 | |
| 57 | #ifndef __ASSEMBLY__ |
| 58 | typedef long int __jmp_buf[17]; |
| 59 | #endif |
| 60 | |
| 61 | #endif /* bits/setjmp.h */ |
| 62 |
Warning: That file was not part of the compilation database. It may have many parsing errors.