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-rw-r--r--libc/sysdeps/linux/powerpc/bits/setjmp.h47
1 files changed, 40 insertions, 7 deletions
diff --git a/libc/sysdeps/linux/powerpc/bits/setjmp.h b/libc/sysdeps/linux/powerpc/bits/setjmp.h
index b53cdea3b..dad90c74c 100644
--- a/libc/sysdeps/linux/powerpc/bits/setjmp.h
+++ b/libc/sysdeps/linux/powerpc/bits/setjmp.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997, 1998, 2000 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
@@ -17,8 +17,10 @@
02111-1307 USA. */
/* Define the machine-dependent type `jmp_buf'. PowerPC version. */
+#ifndef _BITS_SETJMP_H
+#define _BITS_SETJMP_H 1
-#ifndef _SETJMP_H
+#if !defined _SETJMP_H && !defined _PTHREAD_H
# error "Never include <bits/setjmp.h> directly; use <setjmp.h> instead."
#endif
@@ -27,21 +29,52 @@
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 */
-# 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)
+# 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
-typedef long int __jmp_buf[58];
+# 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 */