diff options
Diffstat (limited to 'sysdeps/powerpc/bits/setjmp.h')
| -rw-r--r-- | sysdeps/powerpc/bits/setjmp.h | 28 |
1 files changed, 22 insertions, 6 deletions
diff --git a/sysdeps/powerpc/bits/setjmp.h b/sysdeps/powerpc/bits/setjmp.h index f849fe23ff..3134916a51 100644 --- a/sysdeps/powerpc/bits/setjmp.h +++ b/sysdeps/powerpc/bits/setjmp.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1997, 1998, 2000, 2003 Free Software Foundation, Inc. +/* 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 @@ -37,22 +37,38 @@ # 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. */ +# 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 (40*8) +# 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 (58*4) +# 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[40]; +typedef long int __jmp_buf[64] __attribute__ ((__aligned__ (16))); # else -typedef long int __jmp_buf[58]; +/* 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 |