1 /* Copyright (C) 1997-2022 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, see 16 <https://www.gnu.org/licenses/>. */ 17 18 /* Define the machine-dependent type `jmp_buf'. PowerPC version. */ 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 #include <bits/wordsize.h> 32 33 /* The current powerpc 32-bit Altivec ABI specifies for SVR4 ABI and EABI 34 the vrsave must be at byte 248 & v20 at byte 256. So we must pad this 35 correctly on 32 bit. It also insists that vecregs are only gauranteed 36 4 byte alignment so we need to use vperm in the setjmp/longjmp routines. 37 We have to version the code because members like int __mask_was_saved 38 in the jmp_buf will move as jmp_buf is now larger than 248 bytes. We 39 cannot keep the altivec jmp_buf backward compatible with the jmp_buf. */ 40 #ifndef _ASM 41 # if __WORDSIZE == 64 42 typedef long int __jmp_buf[64] __attribute__ ((__aligned__ (16))); 43 # else 44 /* The alignment is not essential, i.e.the buffer can be copied to a 4 byte 45 aligned buffer as per the ABI it is just added for performance reasons. */ 46 typedef long int __jmp_buf[64 + (12 * 4)] __attribute__ ((__aligned__ (16))); 47 # endif 48 #endif 49 50 #endif /* bits/setjmp.h */ 51