/* Copyright (C) 1997, 1998, 2000, 2003, 2004 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. */ /* Define the machine-dependent type `jmp_buf'. PowerPC version. */ #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. */ #include <bits/wordsize.h> #if defined __USE_MISC || defined _ASM # define JB_GPR1 0 /* Also known as the stack pointer */ # define JB_GPR2 1 # define JB_LR 2 /* The address we will return to */ # if __WORDSIZE == 64 # define JB_GPRS 3 /* GPRs 14 through 31 are saved, 18*2 words total. */ # define JB_CR 21 /* Condition code registers with the VRSAVE at */ /* offset 172 (low half of the double word. */ # define JB_FPRS 22 /* FPRs 14 through 31 are saved, 18*2 words total. */ # define JB_SIZE (64 * 8) /* As per PPC64-VMX ABI. */ # define JB_VRSAVE 21 /* VRSAVE shares a double word with the CR at offset */ /* 168 (high half of the double word). */ # define JB_VRS 40 /* VRs 20 through 31 are saved, 12*4 words total. */ # else # define JB_GPRS 3 /* GPRs 14 through 31 are saved, 18 in total. */ # define JB_CR 21 /* Condition code registers. */ # define JB_FPRS 22 /* FPRs 14 through 31 are saved, 18*2 words total. */ # define JB_SIZE ((64 + (12 * 4)) * 4) # define JB_VRSAVE 62 # define JB_VRS 64 # endif #endif /* The current powerpc 32-bit Altivec ABI specifies for SVR4 ABI and EABI the vrsave must be at byte 248 & v20 at byte 256. So we must pad this correctly on 32 bit. It also insists that vecregs are only gauranteed 4 byte alignment so we need to use vperm in the setjmp/longjmp routines. We have to version the code because members like int __mask_was_saved in the jmp_buf will move as jmp_buf is now larger than 248 bytes. We cannot keep the altivec jmp_buf backward compatible with the jmp_buf. */ #ifndef _ASM # if __WORDSIZE == 64 typedef long int __jmp_buf[64] __attribute__ ((__aligned__ (16))); # else /* The alignment is not essential, i.e.the buffer can be copied to a 4 byte aligned buffer as per the ABI it is just added for performance reasons. */ typedef long int __jmp_buf[64 + (12 * 4)] __attribute__ ((__aligned__ (16))); # endif #endif /* 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_GPR1]) #endif /* bits/setjmp.h */