From 5ef6ae4bdb04ed21b8efc70566d22fab821ec6b2 Mon Sep 17 00:00:00 2001
From: Ulrich Drepper <drepper@redhat.com>
Date: Fri, 16 Jan 2004 04:50:59 +0000
Subject: Update.

2004-01-14  Steven Munroe  <sjmunroe@us.ibm.com>

	* include/libc-symbols.h [HAVE_ASM_GLOBAL_DOT_NAME]
	(_symbol_version): Use C_SYMBOL_DOT_NAME to create '.'ed symbols.
	(_default_symbol_version): Use C_SYMBOL_DOT_NAME to create '.'ed
	symbols.
	* sysdeps/powerpc/Makefile: Add rtld-global-offsets.sym to
	gen-as-const-headers.
	* sysdeps/powerpc/elf/rtld-global-offsets.sym: New file.
	* sysdeps/powerpc/sysdep.h: Define v# symbols for vector registers.
	Define PPC_FEATURE_* masks for Aux Vector AT_HWCAP.
	* sysdeps/unix/sysv/linux/kernel-features.h
	(__ASSUME_SWAPCONTEXT_SYSCALL): Define for PPC and 2.6.0 kernels.
	* sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h [!__WORDSIZE == 32]:
	Declare mcontext_t inline and include altivec state for 64-bit.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/Versions: Add GLIBC_2.3.4
	versions for setcontext, getcontext, and swapcontext.

	* sysdeps/unix/sysv/linux/powerpc/powerpc64/Versions: Add GLIBC_2.3.4
	versions for setcontext, getcontext, swapcontext, and makecontext.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S
	(__getcontext):  Upgrade to save Altivec regs and version GLIBC_2_3_4.
	[SHLIB_COMPAT (libc, GLIBC_2_3, GLIBC_2_3_4)](__novec_getcontext):
	Compatible with GLIBC_2.3.3 release.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S
	(__makecontext): Use parm save area instead of compiler_dw to hold
	context pointer.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S
	(__setcontext):  Upgrade to restore Altivec regs and version
	GLIBC_2_3_4.
	[SHLIB_COMPAT (libc, GLIBC_2_3, GLIBC_2_3_4)](__novec_setcontext):
	Compatible with GLIBC_2.3.3 release.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S
	(__swapcontext): Upgrade to swap Altivec regs and version GLIBC_2_3_4.
	[SHLIB_COMPAT (libc, GLIBC_2_3, GLIBC_2_3_4)](__novec_swapcontext):
	Compatible with GLIBC_2.3.3 release.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/ucontext_i.h
	(SIGCONTEXT_V_REGS_PTR, SIGCONTEXT_V_RESERVE): Defined.


2004-01-12  Steven Munroe  <sjmunroe@us.ibm.com>

	* sysdeps/unix/sysv/linux/powerpc/powerpc32/Versions: Add GLIBC_2.3.4
	versions for setcontext, getcontext, swapcontext, and makecontext.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/getcontext.S
	(__getcontext):  Upgrade to save Altivec regs and version GLIBC_2_3_4.
	[SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4)](__novec_getcontext):
	Compatible with GLIBC_2.3.3 release.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/makecontext.S
	(__makecontext): Upgrade to align for Altivec regs and version
	GLIBC_2_3_4.
	[SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4)](__novec_makecontext):
	Compatible with GLIBC_2.3.3 release.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/setcontext.S
	(__setcontext):  Upgrade to restore Altivec regs and version
	GLIBC_2_3_4.
	[SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4)](__novec_setcontext):
	Compatible with GLIBC_2.3.3 release.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext.S
	(__swapcontext): Upgrade to swap Altivec regs and version GLIBC_2_3_4.
	[SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4)]
	(__novec_swapcontext): Compatible with GLIBC_2.3.3 release.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/ucontext_i.h:
	(_UC_VSCR, _UC_VRSAVE): Define.
	(_FRAME_BACKCHAIN, _FRAME_LR_SAVE,_FRAME_PARM_SAVE1,_FRAME_PARM_SAVE2,
	_FRAME_PARM_SAVE3, _FRAME_PARM_SAVE4): Defined.
---
 sysdeps/unix/sysv/linux/kernel-features.h          |   7 +
 sysdeps/unix/sysv/linux/powerpc/powerpc32/Versions |   3 +
 .../unix/sysv/linux/powerpc/powerpc32/getcontext.S | 236 +++++++++-
 .../sysv/linux/powerpc/powerpc32/makecontext.S     |  94 +++-
 .../unix/sysv/linux/powerpc/powerpc32/setcontext.S | 253 ++++++++++-
 .../sysv/linux/powerpc/powerpc32/swapcontext.S     | 461 ++++++++++++++++++-
 .../unix/sysv/linux/powerpc/powerpc32/ucontext_i.h |   9 +
 sysdeps/unix/sysv/linux/powerpc/powerpc64/Versions |   5 +
 .../unix/sysv/linux/powerpc/powerpc64/getcontext.S | 260 ++++++++++-
 .../sysv/linux/powerpc/powerpc64/makecontext.S     |   8 +-
 .../unix/sysv/linux/powerpc/powerpc64/setcontext.S | 283 +++++++++++-
 .../sysv/linux/powerpc/powerpc64/swapcontext.S     | 490 ++++++++++++++++++++-
 .../unix/sysv/linux/powerpc/powerpc64/ucontext_i.h |   2 +
 sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h     |  74 +++-
 14 files changed, 2153 insertions(+), 32 deletions(-)

(limited to 'sysdeps/unix')

diff --git a/sysdeps/unix/sysv/linux/kernel-features.h b/sysdeps/unix/sysv/linux/kernel-features.h
index c2618ff8ed..43e95dfee4 100644
--- a/sysdeps/unix/sysv/linux/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/kernel-features.h
@@ -379,3 +379,10 @@
 #if __LINUX_KERNEL_VERSION >= 132609
 # define __ASSUME_PROT_GROWSUPDOWN	1
 #endif
+
+/* Starting with 2.6.0 PowerPC adds signal/swapcontext support for Vector 
+   SIMD (AKA Altivec, VMX) instructions and register state.  This changes 
+   the overall size of the sigcontext and adds the swapcontext syscall.  */
+#if __LINUX_KERNEL_VERSION >= (132608) && defined __powerpc__
+# define __ASSUME_SWAPCONTEXT_SYSCALL		1
+#endif
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/Versions b/sysdeps/unix/sysv/linux/powerpc/powerpc32/Versions
index d667eadbce..181d70150c 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/Versions
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/Versions
@@ -24,4 +24,7 @@ libc {
     posix_fadvise64; posix_fallocate64;
     setcontext; getcontext; swapcontext; makecontext;
   }
+  GLIBC_2.3.4 {
+    setcontext; getcontext; swapcontext; makecontext;
+  }
 }
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/getcontext.S b/sysdeps/unix/sysv/linux/powerpc/powerpc32/getcontext.S
index 3b1b3b9449..760e9b5534 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/getcontext.S
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/getcontext.S
@@ -1,5 +1,5 @@
 /* Save current context.
-   Copyright (C) 2002 Free Software Foundation, Inc.
+   Copyright (C) 2002, 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
@@ -18,6 +18,7 @@
    02111-1307 USA.  */
 
 #include <sysdep.h>
+#include <rtld-global-offsets.h>
 #include <shlib-compat.h>
 
 #define __ASSEMBLY__
@@ -25,6 +26,231 @@
 #include "ucontext_i.h"
 
 ENTRY(__getcontext)
+	stw	r3,_FRAME_PARM_SAVE1(r1)
+	addi	r3,r3,_UC_REG_SPACE+12
+	clrrwi  r3,r3,4
+	stw	r0,_UC_GREGS+(PT_R0*4)(r3)
+	mflr	r0
+	stw	r1,_UC_GREGS+(PT_R1*4)(r3)
+	stwu	r1,-16(r1)
+	stw	r0,_UC_GREGS+(PT_LNK*4)(r3)
+	stw	r0,_UC_GREGS+(PT_NIP*4)(r3)
+	stw	r0,_FRAME_LR_SAVE+16(r1)
+	stw	r2,_UC_GREGS+(PT_R2*4)(r3)
+	stw	r4,_UC_GREGS+(PT_R4*4)(r3)
+	stw	r5,_UC_GREGS+(PT_R5*4)(r3)
+	stw	r6,_UC_GREGS+(PT_R6*4)(r3)
+	stw	r7,_UC_GREGS+(PT_R7*4)(r3)
+	stw	r8,_UC_GREGS+(PT_R8*4)(r3)
+	stw	r9,_UC_GREGS+(PT_R9*4)(r3)
+	stw	r10,_UC_GREGS+(PT_R10*4)(r3)
+	stw	r11,_UC_GREGS+(PT_R11*4)(r3)
+	stw	r12,_UC_GREGS+(PT_R12*4)(r3)
+	stw	r13,_UC_GREGS+(PT_R13*4)(r3)
+	stw	r14,_UC_GREGS+(PT_R14*4)(r3)
+	stw	r15,_UC_GREGS+(PT_R15*4)(r3)
+	stw	r16,_UC_GREGS+(PT_R16*4)(r3)
+	stw	r17,_UC_GREGS+(PT_R17*4)(r3)
+	stw	r18,_UC_GREGS+(PT_R18*4)(r3)
+	stw	r19,_UC_GREGS+(PT_R19*4)(r3)
+	stw	r20,_UC_GREGS+(PT_R20*4)(r3)
+	stw	r21,_UC_GREGS+(PT_R21*4)(r3)
+	stw	r22,_UC_GREGS+(PT_R22*4)(r3)
+	stw	r23,_UC_GREGS+(PT_R23*4)(r3)
+	stw	r24,_UC_GREGS+(PT_R24*4)(r3)
+	stw	r25,_UC_GREGS+(PT_R25*4)(r3)
+	stw	r26,_UC_GREGS+(PT_R26*4)(r3)
+	stw	r27,_UC_GREGS+(PT_R27*4)(r3)
+	stw	r28,_UC_GREGS+(PT_R28*4)(r3)
+	stw	r29,_UC_GREGS+(PT_R29*4)(r3)
+	stw	r30,_UC_GREGS+(PT_R30*4)(r3)
+	stw	r31,_UC_GREGS+(PT_R31*4)(r3)
+	mfctr	r0
+	stw	r0,_UC_GREGS+(PT_CTR*4)(r3)
+	mfxer	r0
+	stw	r0,_UC_GREGS+(PT_XER*4)(r3)
+	mfcr	r0
+	stw	r0,_UC_GREGS+(PT_CCR*4)(r3)
+
+	/* Set the return value of getcontext to "success".  R3 is the only 
+	   register whose value is not preserved in the saved context.  */
+	li	r0,0
+	stw	r0,_UC_GREGS+(PT_R3*4)(r3)
+
+	/* Zero fill fields that can't be set in user state. */
+	stw	r0,_UC_GREGS+(PT_MSR*4)(r3)
+	stw	r0,_UC_GREGS+(PT_MQ*4)(r3)
+
+	/* Save the floating-point registers */
+	stfd	fp0,_UC_FREGS+(0*8)(r3)
+	stfd	fp1,_UC_FREGS+(1*8)(r3)
+	stfd	fp2,_UC_FREGS+(2*8)(r3)
+	stfd	fp3,_UC_FREGS+(3*8)(r3)
+	stfd	fp4,_UC_FREGS+(4*8)(r3)
+	stfd	fp5,_UC_FREGS+(5*8)(r3)
+	stfd	fp6,_UC_FREGS+(6*8)(r3)
+	stfd	fp7,_UC_FREGS+(7*8)(r3)
+	stfd	fp8,_UC_FREGS+(8*8)(r3)
+	stfd	fp9,_UC_FREGS+(9*8)(r3)
+	stfd	fp10,_UC_FREGS+(10*8)(r3)
+	stfd	fp11,_UC_FREGS+(11*8)(r3)
+	stfd	fp12,_UC_FREGS+(12*8)(r3)
+	stfd	fp13,_UC_FREGS+(13*8)(r3)
+	stfd	fp14,_UC_FREGS+(14*8)(r3)
+	stfd	fp15,_UC_FREGS+(15*8)(r3)
+	stfd	fp16,_UC_FREGS+(16*8)(r3)
+	stfd	fp17,_UC_FREGS+(17*8)(r3)
+	stfd	fp18,_UC_FREGS+(18*8)(r3)
+	stfd	fp19,_UC_FREGS+(19*8)(r3)
+	stfd	fp20,_UC_FREGS+(20*8)(r3)
+	stfd	fp21,_UC_FREGS+(21*8)(r3)
+	stfd	fp22,_UC_FREGS+(22*8)(r3)
+	stfd	fp23,_UC_FREGS+(23*8)(r3)
+	stfd	fp24,_UC_FREGS+(24*8)(r3)
+	stfd	fp25,_UC_FREGS+(25*8)(r3)
+	stfd	fp26,_UC_FREGS+(26*8)(r3)
+	stfd	fp27,_UC_FREGS+(27*8)(r3)
+	stfd	fp28,_UC_FREGS+(28*8)(r3)
+	stfd	fp29,_UC_FREGS+(29*8)(r3)
+	mffs	fp0
+	stfd	fp30,_UC_FREGS+(30*8)(r3)
+	stfd	fp31,_UC_FREGS+(31*8)(r3)
+	stfd	fp0,_UC_FREGS+(32*8)(r3)
+
+#ifdef PIC
+	mflr    r8
+	bl      _GLOBAL_OFFSET_TABLE_@local-4
+	mflr    r7
+#ifdef SHARED	
+	lwz     r7,_rtld_global@got(r7)
+	mtlr    r8
+	lwz     r7,RTLD_GLOBAL_DL_HWCAP_OFFSET(r7)
+#else	
+	lwz     r7,_dl_hwcap@got(r7)
+	mtlr    r8
+	lwz     r7,0(r7)
+#endif
+#else
+	lis	r7,_dl_hwcap@ha
+	lwz     r7,_dl_hwcap@l(r7)
+#endif
+	andis.	r7,r7,(PPC_FEATURE_HAS_ALTIVEC >> 16)
+	beq	L(no_vec)
+  
+	la	r10,(_UC_VREGS)(r3)
+	la	r9,(_UC_VREGS+16)(r3)
+
+	stvx  v0,0,r10  
+	stvx  v1,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v2,0,r10  
+	stvx  v3,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v4,0,r10  
+	stvx  v5,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v6,0,r10  
+	stvx  v7,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v8,0,r10  
+	stvx  v9,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v10,0,r10  
+	stvx  v11,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v12,0,r10  
+	stvx  v13,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v14,0,r10  
+	stvx  v15,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v16,0,r10  
+	stvx  v17,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v18,0,r10  
+	stvx  v11,0,r9
+	addi  r19,r10,32
+	addi  r9,r9,32
+
+	stvx  v20,0,r10  
+	stvx  v21,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v22,0,r10  
+	stvx  v23,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v24,0,r10  
+	stvx  v25,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v26,0,r10  
+	stvx  v27,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v28,0,r10  
+	stvx  v29,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v30,0,r10  
+	stvx  v31,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v10,0,r10  
+	stvx  v11,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+  
+	mfvscr	v0
+	mfspr	r0,VRSAVE
+	stvx	v0,0,r10
+	sync
+ 	stw	r0,0(r10)
+
+L(no_vec):
+/* Restore ucontext (parm1) from stack.  */
+	lwz	r12,_FRAME_PARM_SAVE1+16(r1)
+	li	r4,0
+	stw	r3,_UC_REGS_PTR(r12)
+	addi	r5,r12,_UC_SIGMASK
+	li	r3,SIG_BLOCK
+	bl	JUMPTARGET(sigprocmask)
+
+	lwz	r0,_FRAME_LR_SAVE+16(r1)
+	addi	r1,r1,16
+	mtlr	r0
+	blr
+PSEUDO_END(__getcontext)
+
+versioned_symbol (libc, __getcontext, getcontext, GLIBC_2_3_4)
+
+#if SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4)
+
+ENTRY(__novec_getcontext)
 	/*
 	 * Since we are not attempting to save the altivec registers,
 	 * there is no need to get the register storage space
@@ -119,7 +345,7 @@ ENTRY(__getcontext)
 	stfd	fp30,_UC_FREGS+(30*8)(r3)
 	stfd	fp31,_UC_FREGS+(31*8)(r3)
 	stfd	fp0,_UC_FREGS+(32*8)(r3)
-
+	
 	addi	r5,r3,_UC_SIGMASK - _UC_REG_SPACE
 	li	r4,0
 	li	r3,SIG_BLOCK
@@ -129,9 +355,11 @@ ENTRY(__getcontext)
 	addi	r1,r1,16
 	mtlr	r0
 	blr
-PSEUDO_END(__getcontext)
+PSEUDO_END(__novec_getcontext)
+
+compat_symbol (libc, __novec_getcontext, getcontext, GLIBC_2_3_3)
 
-versioned_symbol (libc, __getcontext, getcontext, GLIBC_2_3_3)
+#endif
 
 #if SHLIB_COMPAT (libc, GLIBC_2_1, GLIBC_2_3_3)
 
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/makecontext.S b/sysdeps/unix/sysv/linux/powerpc/powerpc32/makecontext.S
index 9cb0b874f5..9f34357deb 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/makecontext.S
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/makecontext.S
@@ -1,5 +1,5 @@
 /* Set up a context to call a function.
-   Copyright (C) 2002 Free Software Foundation, Inc.
+   Copyright (C) 2002, 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
@@ -26,7 +26,8 @@
 
 ENTRY(__makecontext)
 	/* Set up the first 7 args to the function in its registers */
-	addi	r11,r3,_UC_REG_SPACE
+	addi	r11,r3,_UC_REG_SPACE+12
+	clrrwi  r11,r11,4
 	stw	r11,_UC_REGS_PTR(r3)
 	stw	r6,_UC_GREGS+(PT_R3*4)(r11)
 	stw	r7,_UC_GREGS+(PT_R4*4)(r11)
@@ -106,7 +107,94 @@ L(exitcode):
 
 END(__makecontext)
 
-versioned_symbol (libc, __makecontext, makecontext, GLIBC_2_3_3)
+versioned_symbol (libc, __makecontext, makecontext, GLIBC_2_3_4)
+
+#if SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4)
+
+ENTRY(__novec_makecontext)
+	/* Set up the first 7 args to the function in its registers */
+	addi	r11,r3,_UC_REG_SPACE
+	stw	r11,_UC_REGS_PTR(r3)
+	stw	r6,_UC_GREGS+(PT_R3*4)(r11)
+	stw	r7,_UC_GREGS+(PT_R4*4)(r11)
+	stw	r8,_UC_GREGS+(PT_R5*4)(r11)
+	stw	r9,_UC_GREGS+(PT_R6*4)(r11)
+	stw	r10,_UC_GREGS+(PT_R7*4)(r11)
+	lwz	r8,8(r1)
+	lwz	r9,12(r1)
+	stw	r8,_UC_GREGS+(PT_R8*4)(r11)
+	stw	r9,_UC_GREGS+(PT_R9*4)(r11)
+
+	/* Set the NIP to the start of the function */
+	stw	r4,_UC_GREGS+(PT_NIP*4)(r11)
+
+	/* Set the function's r31 to ucp->uc_link for the exitcode below. */
+	lwz	r7,_UC_LINK(r3)
+	stw	r7,_UC_GREGS+(PT_R31*4)(r11)
+
+	/* Set the function's LR to point to the exitcode below. */
+#ifdef PIC
+	mflr	r0
+	bl	1f
+1:	mflr	r6
+	addi	r6,r6,L(novec_exitcode)-1b
+	mtlr	r0
+#else
+	lis	r6,L(novec_exitcode)@ha
+	addi	r6,r6,L(novec_exitcode)@l
+#endif
+	stw	r6,_UC_GREGS+(PT_LNK*4)(r11)
+
+	/*
+	 * Set up the stack frame for the function.
+	 * If we have more than 5 args to the function (8 args to makecontext),
+	 * there will be some arguments on the stack which have to end up
+	 * in registers.  If there are more than 8 args to the function,
+	 * we have to copy (argc - 8) args from our stack to the functions'
+	 * stack (and allow space for them in the frame).
+	 */
+	lwz	r4,_UC_STACK_SP(r3)
+	lwz	r8,_UC_STACK_SIZE(r3)
+	add	r4,r4,r8
+	rlwinm	r4,r4,0,0,27	/* round down to 16-byte boundary */
+	addi	r7,r4,-16	/* stack frame for fn's caller */
+	cmpwi	r5,8
+	blt	2f		/* less than 8 args is easy */
+	lwz	r10,16(r1)
+	stw	r10,_UC_GREGS+(PT_R10*4)(r11)
+	beq	2f		/* if exactly 8 args */
+	subi	r9,r5,3
+	subi	r5,r5,8
+	rlwinm	r9,r9,2,0,27
+	subf	r7,r9,r4
+	mtctr	r5		/* copy the 9th and following args */
+	addi	r6,r1,16
+	addi	r8,r7,4
+3:	lwzu	r10,4(r6)
+	stwu	r10,4(r8)
+	bdnz	3b
+2:	stw	r7,_UC_GREGS+(PT_R1*4)(r11)
+	li	r6,0
+	stw	r6,0(r7)
+
+	blr
+
+/*
+ * If the function returns, it comes here.  We put ucp->uc_link in
+ * r31, which is a callee-saved register.  We have to continue with
+ * the context that r31 points to, or exit if it is 0.
+ */
+L(novec_exitcode):
+	mr.	r3,r31
+	beq	4f
+	bl	JUMPTARGET(__novec_setcontext)
+4:	bl	HIDDEN_JUMPTARGET(exit)
+	b	4b
+
+END(__makecontext)
+
+compat_symbol (libc, __novec_makecontext, makecontext, GLIBC_2_3_3)
+#endif
 
 #if SHLIB_COMPAT (libc, GLIBC_2_1, GLIBC_2_3_3)
 
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/setcontext.S b/sysdeps/unix/sysv/linux/powerpc/powerpc32/setcontext.S
index deb946137d..cb2779731e 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/setcontext.S
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/setcontext.S
@@ -1,5 +1,5 @@
 /* Jump to a new context.
-   Copyright (C) 2002 Free Software Foundation, Inc.
+   Copyright (C) 2002, 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
@@ -18,6 +18,7 @@
    02111-1307 USA.  */
 
 #include <sysdep.h>
+#include <rtld-global-offsets.h>
 #include <shlib-compat.h>
 
 #define __ASSEMBLY__
@@ -53,7 +54,122 @@ ENTRY(__setcontext)
 	bl	JUMPTARGET(sigprocmask)
 	cmpwi	r3,0
 	bne	L(error_exit)
+	
+#ifdef PIC
+	mflr    r8
+	bl      _GLOBAL_OFFSET_TABLE_@local-4
+	mflr    r7
+#ifdef SHARED	
+	lwz     r7,_rtld_global@got(r7)
+	mtlr    r8
+	lwz     r7,RTLD_GLOBAL_DL_HWCAP_OFFSET(r7)
+#else	
+	lwz     r7,_dl_hwcap@got(r7)
+	mtlr    r8
+	lwz     r7,0(r7)
+#endif
+#else
+	lis	r7,_dl_hwcap@ha
+	lwz     r7,_dl_hwcap@l(r7)
+#endif
+	andis.	r7,r7,(PPC_FEATURE_HAS_ALTIVEC >> 16)
+	la	r10,(_UC_VREGS)(r31)
+	beq	L(has_no_vec)
+	
+	lwz   r0,(32*16)(r10)
+	li    r9,(32*16)
+	cmpwi r0,0
+	mtspr VRSAVE,r0
+	beq   L(has_no_vec)  
+
+	lvx   v19,r9,r10
+	la    r9,(16)(r10)
+
+	lvx   v0,0,r10  
+	lvx   v1,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	mtvscr  v19
+	lvx   v2,0,r10  
+	lvx   v3,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v4,0,r10  
+	lvx   v5,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v6,0,r10  
+	lvx   v7,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v8,0,r10  
+	lvx   v9,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v10,0,r10  
+	lvx   v11,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v12,0,r10  
+	lvx   v13,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v14,0,r10  
+	lvx   v15,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v16,0,r10  
+	lvx   v17,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v18,0,r10  
+	lvx   v11,0,r9
+	addi  r19,r10,32
+	addi  r9,r9,32
+
+	lvx   v20,0,r10  
+	lvx   v21,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v22,0,r10  
+	lvx   v23,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v24,0,r10  
+	lvx   v25,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
 
+	lvx   v26,0,r10  
+	lvx   v27,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v28,0,r10  
+	lvx   v29,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v30,0,r10  
+	lvx   v31,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v10,0,r10  
+	lvx   v11,0,r9
+	
+L(has_no_vec):
 	/* Restore the floating-point registers */
 	lfd	fp31,_UC_FREGS+(32*8)(r31)
 	lfd	fp0,_UC_FREGS+(0*8)(r31)
@@ -147,9 +263,138 @@ L(do_sigret):
 
 PSEUDO_END (__setcontext)
 
-versioned_symbol (libc, __setcontext, setcontext, GLIBC_2_3_3)
+versioned_symbol (libc, __setcontext, setcontext, GLIBC_2_3_4)
+
+#if SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4)
+
+ENTRY(__novec_setcontext)
+	mflr	r0
+	stwu	r1,-16(r1)
+	stw	r0,20(r1)
+	stw	r31,12(r1)
+	lwz	r31,_UC_REGS_PTR(r3)
+
+	/*
+	 * If this ucontext refers to the point where we were interrupted
+	 * by a signal, we have to use the rt_sigreturn system call to
+	 * return to the context so we get both LR and CTR restored.
+	 *
+	 * Otherwise, the context we are restoring is either just after
+	 * a procedure call (getcontext/swapcontext) or at the beginning
+	 * of a procedure call (makecontext), so we don't need to restore
+	 * r0, xer, ctr.  We don't restore r2 since it will be used as
+	 * the TLS pointer.
+	 */
+	lwz	r0,_UC_GREGS+(PT_MSR*4)(r31)
+	cmpwi	r0,0
+	bne	L(novec_do_sigret)
+
+	/* Restore the signal mask */
+	li	r5,0
+	addi	r4,r3,_UC_SIGMASK
+	li	r3,SIG_SETMASK
+	bl	JUMPTARGET(sigprocmask)
+	cmpwi	r3,0
+	bne	L(novec_error_exit)
+
+	/* Restore the floating-point registers */
+	lfd	fp31,_UC_FREGS+(32*8)(r31)
+	lfd	fp0,_UC_FREGS+(0*8)(r31)
+	mtfsf	0xff,fp31
+	lfd	fp1,_UC_FREGS+(1*8)(r31)
+	lfd	fp2,_UC_FREGS+(2*8)(r31)
+	lfd	fp3,_UC_FREGS+(3*8)(r31)
+	lfd	fp4,_UC_FREGS+(4*8)(r31)
+	lfd	fp5,_UC_FREGS+(5*8)(r31)
+	lfd	fp6,_UC_FREGS+(6*8)(r31)
+	lfd	fp7,_UC_FREGS+(7*8)(r31)
+	lfd	fp8,_UC_FREGS+(8*8)(r31)
+	lfd	fp9,_UC_FREGS+(9*8)(r31)
+	lfd	fp10,_UC_FREGS+(10*8)(r31)
+	lfd	fp11,_UC_FREGS+(11*8)(r31)
+	lfd	fp12,_UC_FREGS+(12*8)(r31)
+	lfd	fp13,_UC_FREGS+(13*8)(r31)
+	lfd	fp14,_UC_FREGS+(14*8)(r31)
+	lfd	fp15,_UC_FREGS+(15*8)(r31)
+	lfd	fp16,_UC_FREGS+(16*8)(r31)
+	lfd	fp17,_UC_FREGS+(17*8)(r31)
+	lfd	fp18,_UC_FREGS+(18*8)(r31)
+	lfd	fp19,_UC_FREGS+(19*8)(r31)
+	lfd	fp20,_UC_FREGS+(20*8)(r31)
+	lfd	fp21,_UC_FREGS+(21*8)(r31)
+	lfd	fp22,_UC_FREGS+(22*8)(r31)
+	lfd	fp23,_UC_FREGS+(23*8)(r31)
+	lfd	fp24,_UC_FREGS+(24*8)(r31)
+	lfd	fp25,_UC_FREGS+(25*8)(r31)
+	lfd	fp26,_UC_FREGS+(26*8)(r31)
+	lfd	fp27,_UC_FREGS+(27*8)(r31)
+	lfd	fp28,_UC_FREGS+(28*8)(r31)
+	lfd	fp29,_UC_FREGS+(29*8)(r31)
+	lfd	fp30,_UC_FREGS+(30*8)(r31)
+	lfd	fp31,_UC_FREGS+(31*8)(r31)
+
+	/* Restore LR and CCR, and set CTR to the NIP value */
+	lwz	r3,_UC_GREGS+(PT_LNK*4)(r31)
+	lwz	r4,_UC_GREGS+(PT_NIP*4)(r31)
+	lwz	r5,_UC_GREGS+(PT_CCR*4)(r31)
+	mtlr	r3
+	mtctr	r4
+	mtcr	r5
+
+	/* Restore the general registers */
+	lwz	r1,_UC_GREGS+(PT_R1*4)(r31)
+	lwz	r3,_UC_GREGS+(PT_R3*4)(r31)
+	lwz	r4,_UC_GREGS+(PT_R4*4)(r31)
+	lwz	r5,_UC_GREGS+(PT_R5*4)(r31)
+	lwz	r6,_UC_GREGS+(PT_R6*4)(r31)
+	lwz	r7,_UC_GREGS+(PT_R7*4)(r31)
+	lwz	r8,_UC_GREGS+(PT_R8*4)(r31)
+	lwz	r9,_UC_GREGS+(PT_R9*4)(r31)
+	lwz	r10,_UC_GREGS+(PT_R10*4)(r31)
+	lwz	r11,_UC_GREGS+(PT_R11*4)(r31)
+	lwz	r12,_UC_GREGS+(PT_R12*4)(r31)
+	lwz	r13,_UC_GREGS+(PT_R13*4)(r31)
+	lwz	r14,_UC_GREGS+(PT_R14*4)(r31)
+	lwz	r15,_UC_GREGS+(PT_R15*4)(r31)
+	lwz	r16,_UC_GREGS+(PT_R16*4)(r31)
+	lwz	r17,_UC_GREGS+(PT_R17*4)(r31)
+	lwz	r18,_UC_GREGS+(PT_R18*4)(r31)
+	lwz	r19,_UC_GREGS+(PT_R19*4)(r31)
+	lwz	r20,_UC_GREGS+(PT_R20*4)(r31)
+	lwz	r21,_UC_GREGS+(PT_R21*4)(r31)
+	lwz	r22,_UC_GREGS+(PT_R22*4)(r31)
+	lwz	r23,_UC_GREGS+(PT_R23*4)(r31)
+	lwz	r24,_UC_GREGS+(PT_R24*4)(r31)
+	lwz	r25,_UC_GREGS+(PT_R25*4)(r31)
+	lwz	r26,_UC_GREGS+(PT_R26*4)(r31)
+	lwz	r27,_UC_GREGS+(PT_R27*4)(r31)
+	lwz	r28,_UC_GREGS+(PT_R28*4)(r31)
+	lwz	r29,_UC_GREGS+(PT_R29*4)(r31)
+	lwz	r30,_UC_GREGS+(PT_R30*4)(r31)
+	lwz	r31,_UC_GREGS+(PT_R31*4)(r31)
+
+	bctr
+
+L(novec_error_exit):
+	lwz	r31,12(r1)
+	lwz	r0,20(r1)
+	addi	r1,r1,16
+	mtlr	r0
+	blr
+	
+L(novec_do_sigret):
+	addi	r1,r3,-0xd0
+	li	r0,SYS_ify(rt_sigreturn)
+	sc
+	/* NOTREACHED */
+
+PSEUDO_END (__setcontext)
+
+compat_symbol (libc, __novec_setcontext, setcontext, GLIBC_2_3_3)
+
+#endif
 
-#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_3_3)
+#if SHLIB_COMPAT (libc, GLIBC_2_1, GLIBC_2_3_3)
 
 #define _ERRNO_H	1
 #include <bits/errno.h>
@@ -159,6 +404,6 @@ ENTRY (__setcontext_stub)
 	b	JUMPTARGET(__syscall_error)
 	END (__setcontext_stub)
 
-compat_symbol (libc, __setcontext_stub, setcontext, GLIBC_2_0)
+compat_symbol (libc, __setcontext_stub, setcontext, GLIBC_2_1)
 
 #endif
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext.S b/sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext.S
index fac6802959..11f488a63b 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext.S
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext.S
@@ -1,5 +1,5 @@
 /* Save current context and jump to a new context.
-   Copyright (C) 2002 Free Software Foundation, Inc.
+   Copyright (C) 2002, 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
@@ -18,6 +18,7 @@
    02111-1307 USA.  */
 
 #include <sysdep.h>
+#include <rtld-global-offsets.h>
 #include <shlib-compat.h>
 
 #define __ASSEMBLY__
@@ -25,6 +26,454 @@
 #include "ucontext_i.h"
 
 ENTRY(__swapcontext)
+	/* Save the current context */
+	stw	r3,_FRAME_PARM_SAVE1(r1)
+	addi	r3,r3,_UC_REG_SPACE+12
+	clrrwi  r3,r3,4
+	stw	r0,_UC_GREGS+(PT_R0*4)(r3)
+	stw	r1,_UC_GREGS+(PT_R1*4)(r3)
+	mflr	r0
+	stwu	r1,-16(r1)
+	stw	r0,20(r1)
+	stw	r31,12(r1)
+	stw	r31,_UC_GREGS+(PT_R31*4)(r3)
+	mr	r31,r4			/* new context pointer */
+	stw	r0,_UC_GREGS+(PT_LNK*4)(r3)
+	stw	r0,_UC_GREGS+(PT_NIP*4)(r3)
+	stw	r2,_UC_GREGS+(PT_R2*4)(r3)
+	stw	r4,_UC_GREGS+(PT_R4*4)(r3)
+	stw	r5,_UC_GREGS+(PT_R5*4)(r3)
+	stw	r6,_UC_GREGS+(PT_R6*4)(r3)
+	stw	r7,_UC_GREGS+(PT_R7*4)(r3)
+	stw	r8,_UC_GREGS+(PT_R8*4)(r3)
+	stw	r9,_UC_GREGS+(PT_R9*4)(r3)
+	stw	r10,_UC_GREGS+(PT_R10*4)(r3)
+	stw	r11,_UC_GREGS+(PT_R11*4)(r3)
+	stw	r12,_UC_GREGS+(PT_R12*4)(r3)
+	stw	r13,_UC_GREGS+(PT_R13*4)(r3)
+	stw	r14,_UC_GREGS+(PT_R14*4)(r3)
+	stw	r15,_UC_GREGS+(PT_R15*4)(r3)
+	stw	r16,_UC_GREGS+(PT_R16*4)(r3)
+	stw	r17,_UC_GREGS+(PT_R17*4)(r3)
+	stw	r18,_UC_GREGS+(PT_R18*4)(r3)
+	stw	r19,_UC_GREGS+(PT_R19*4)(r3)
+	stw	r20,_UC_GREGS+(PT_R20*4)(r3)
+	stw	r21,_UC_GREGS+(PT_R21*4)(r3)
+	stw	r22,_UC_GREGS+(PT_R22*4)(r3)
+	stw	r23,_UC_GREGS+(PT_R23*4)(r3)
+	stw	r24,_UC_GREGS+(PT_R24*4)(r3)
+	stw	r25,_UC_GREGS+(PT_R25*4)(r3)
+	stw	r26,_UC_GREGS+(PT_R26*4)(r3)
+	stw	r27,_UC_GREGS+(PT_R27*4)(r3)
+	stw	r28,_UC_GREGS+(PT_R28*4)(r3)
+	stw	r29,_UC_GREGS+(PT_R29*4)(r3)
+	stw	r30,_UC_GREGS+(PT_R30*4)(r3)
+	mfctr	r0
+	stw	r0,_UC_GREGS+(PT_CTR*4)(r3)
+	mfxer	r0
+	stw	r0,_UC_GREGS+(PT_XER*4)(r3)
+	mfcr	r0
+	stw	r0,_UC_GREGS+(PT_CCR*4)(r3)
+
+	/* Set the return value of swapcontext to "success".  R3 is the only 
+	   register whose value is not preserved in the saved context.  */
+	li	r0,0
+	stw	r0,_UC_GREGS+(PT_R3*4)(r3)
+
+	/* Zero fill fields that can't be set in user state. */
+	stw	r0,_UC_GREGS+(PT_MSR*4)(r3)
+	stw	r0,_UC_GREGS+(PT_MQ*4)(r3)
+
+	/* Save the floating-point registers */
+	stfd	fp0,_UC_FREGS+(0*8)(r3)
+	stfd	fp1,_UC_FREGS+(1*8)(r3)
+	stfd	fp2,_UC_FREGS+(2*8)(r3)
+	stfd	fp3,_UC_FREGS+(3*8)(r3)
+	stfd	fp4,_UC_FREGS+(4*8)(r3)
+	stfd	fp5,_UC_FREGS+(5*8)(r3)
+	stfd	fp6,_UC_FREGS+(6*8)(r3)
+	stfd	fp7,_UC_FREGS+(7*8)(r3)
+	stfd	fp8,_UC_FREGS+(8*8)(r3)
+	stfd	fp9,_UC_FREGS+(9*8)(r3)
+	stfd	fp10,_UC_FREGS+(10*8)(r3)
+	stfd	fp11,_UC_FREGS+(11*8)(r3)
+	stfd	fp12,_UC_FREGS+(12*8)(r3)
+	stfd	fp13,_UC_FREGS+(13*8)(r3)
+	stfd	fp14,_UC_FREGS+(14*8)(r3)
+	stfd	fp15,_UC_FREGS+(15*8)(r3)
+	stfd	fp16,_UC_FREGS+(16*8)(r3)
+	stfd	fp17,_UC_FREGS+(17*8)(r3)
+	stfd	fp18,_UC_FREGS+(18*8)(r3)
+	stfd	fp19,_UC_FREGS+(19*8)(r3)
+	stfd	fp20,_UC_FREGS+(20*8)(r3)
+	stfd	fp21,_UC_FREGS+(21*8)(r3)
+	stfd	fp22,_UC_FREGS+(22*8)(r3)
+	stfd	fp23,_UC_FREGS+(23*8)(r3)
+	stfd	fp24,_UC_FREGS+(24*8)(r3)
+	stfd	fp25,_UC_FREGS+(25*8)(r3)
+	stfd	fp26,_UC_FREGS+(26*8)(r3)
+	stfd	fp27,_UC_FREGS+(27*8)(r3)
+	stfd	fp28,_UC_FREGS+(28*8)(r3)
+	stfd	fp29,_UC_FREGS+(29*8)(r3)
+	mffs	fp0
+	stfd	fp30,_UC_FREGS+(30*8)(r3)
+	stfd	fp31,_UC_FREGS+(31*8)(r3)
+	stfd	fp0,_UC_FREGS+(32*8)(r3)
+#ifdef PIC
+	mflr    r8
+	bl      _GLOBAL_OFFSET_TABLE_@local-4
+	mflr    r7
+#ifdef SHARED	
+	lwz     r7,_rtld_global@got(r7)
+	mtlr    r8
+	lwz     r7,RTLD_GLOBAL_DL_HWCAP_OFFSET(r7)
+#else	
+	lwz     r7,_dl_hwcap@got(r7)
+	mtlr    r8
+	lwz     r7,0(r7)
+#endif
+#else
+	lis	r7,_dl_hwcap@ha
+	lwz     r7,_dl_hwcap@l(r7)
+#endif
+	andis.	r7,r7,(PPC_FEATURE_HAS_ALTIVEC >> 16)
+	beq	L(no_vec)
+  
+	la	r10,(_UC_VREGS)(r3)
+	la	r9,(_UC_VREGS+16)(r3)
+
+	stvx  v0,0,r10  
+	stvx  v1,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v2,0,r10  
+	stvx  v3,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v4,0,r10  
+	stvx  v5,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v6,0,r10  
+	stvx  v7,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v8,0,r10  
+	stvx  v9,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v10,0,r10  
+	stvx  v11,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v12,0,r10  
+	stvx  v13,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v14,0,r10  
+	stvx  v15,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v16,0,r10  
+	stvx  v17,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v18,0,r10  
+	stvx  v11,0,r9
+	addi  r19,r10,32
+	addi  r9,r9,32
+
+	stvx  v20,0,r10  
+	stvx  v21,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v22,0,r10  
+	stvx  v23,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v24,0,r10  
+	stvx  v25,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v26,0,r10  
+	stvx  v27,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v28,0,r10  
+	stvx  v29,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v30,0,r10  
+	stvx  v31,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	stvx  v10,0,r10  
+	stvx  v11,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+  
+	mfvscr	v0
+	mfspr	r0,VRSAVE
+	stvx	v0,0,r10
+	sync
+ 	stw	r0,0(r10)
+
+L(no_vec):
+/* Restore ucontext (parm1) from stack.  */
+	lwz	r12,_FRAME_PARM_SAVE1+16(r1)
+	li	r4,0
+	stw	r3,_UC_REGS_PTR(r12)
+	addi	r5,r12,_UC_SIGMASK
+	li	r3,SIG_SETMASK
+	bl	JUMPTARGET(sigprocmask)
+	cmpwi	r3,0
+	bne	L(error_exit)
+
+	/*
+	 * If the new ucontext refers to the point where we were interrupted
+	 * by a signal, we have to use the rt_sigreturn system call to
+	 * return to the context so we get both LR and CTR restored.
+	 *
+	 * Otherwise, the context we are restoring is either just after
+	 * a procedure call (getcontext/swapcontext) or at the beginning
+	 * of a procedure call (makecontext), so we don't need to restore
+	 * r0, xer, ctr.  We don't restore r2 since it will be used as
+	 * the TLS pointer.
+	 */
+	mr	r4,r31
+	lwz	r31,_UC_REGS_PTR(r31)
+	lwz	r0,_UC_GREGS+(PT_MSR*4)(r31)
+	cmpwi	r0,0
+	bne	L(do_sigret)
+	
+#ifdef PIC
+	mflr    r8
+	bl      _GLOBAL_OFFSET_TABLE_@local-4
+	mflr    r7
+#ifdef SHARED	
+	lwz     r7,_rtld_global@got(r7)
+	mtlr    r8
+	lwz     r7,RTLD_GLOBAL_DL_HWCAP_OFFSET(r7)
+#else	
+	lwz     r7,_dl_hwcap@got(r7)
+	mtlr    r8
+	lwz     r7,0(r7)
+#endif
+#else
+	lis	r7,_dl_hwcap@ha
+	lwz     r7,_dl_hwcap@l(r7)
+#endif
+	andis.	r7,r7,(PPC_FEATURE_HAS_ALTIVEC >> 16)
+	la	r10,(_UC_VREGS)(r31)
+	beq	L(has_no_vec)
+	
+	lwz   r0,(32*16)(r10)
+	li    r9,(32*16)
+	cmpwi r0,0
+	mtspr VRSAVE,r0
+	beq   L(has_no_vec)  
+
+	lvx   v19,r9,r10
+	la    r9,(16)(r10)
+
+	lvx   v0,0,r10  
+	lvx   v1,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	mtvscr  v19
+	lvx   v2,0,r10  
+	lvx   v3,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v4,0,r10  
+	lvx   v5,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v6,0,r10  
+	lvx   v7,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v8,0,r10  
+	lvx   v9,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v10,0,r10  
+	lvx   v11,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v12,0,r10  
+	lvx   v13,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v14,0,r10  
+	lvx   v15,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v16,0,r10  
+	lvx   v17,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v18,0,r10  
+	lvx   v11,0,r9
+	addi  r19,r10,32
+	addi  r9,r9,32
+
+	lvx   v20,0,r10  
+	lvx   v21,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v22,0,r10  
+	lvx   v23,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v24,0,r10  
+	lvx   v25,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v26,0,r10  
+	lvx   v27,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v28,0,r10  
+	lvx   v29,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v30,0,r10  
+	lvx   v31,0,r9
+	addi  r10,r10,32
+	addi  r9,r9,32
+
+	lvx   v10,0,r10  
+	lvx   v11,0,r9
+	
+L(has_no_vec):
+	/* Restore the floating-point registers */
+	lfd	fp31,_UC_FREGS+(32*8)(r31)
+	lfd	fp0,_UC_FREGS+(0*8)(r31)
+	mtfsf	0xff,fp31
+	lfd	fp1,_UC_FREGS+(1*8)(r31)
+	lfd	fp2,_UC_FREGS+(2*8)(r31)
+	lfd	fp3,_UC_FREGS+(3*8)(r31)
+	lfd	fp4,_UC_FREGS+(4*8)(r31)
+	lfd	fp5,_UC_FREGS+(5*8)(r31)
+	lfd	fp6,_UC_FREGS+(6*8)(r31)
+	lfd	fp7,_UC_FREGS+(7*8)(r31)
+	lfd	fp8,_UC_FREGS+(8*8)(r31)
+	lfd	fp9,_UC_FREGS+(9*8)(r31)
+	lfd	fp10,_UC_FREGS+(10*8)(r31)
+	lfd	fp11,_UC_FREGS+(11*8)(r31)
+	lfd	fp12,_UC_FREGS+(12*8)(r31)
+	lfd	fp13,_UC_FREGS+(13*8)(r31)
+	lfd	fp14,_UC_FREGS+(14*8)(r31)
+	lfd	fp15,_UC_FREGS+(15*8)(r31)
+	lfd	fp16,_UC_FREGS+(16*8)(r31)
+	lfd	fp17,_UC_FREGS+(17*8)(r31)
+	lfd	fp18,_UC_FREGS+(18*8)(r31)
+	lfd	fp19,_UC_FREGS+(19*8)(r31)
+	lfd	fp20,_UC_FREGS+(20*8)(r31)
+	lfd	fp21,_UC_FREGS+(21*8)(r31)
+	lfd	fp22,_UC_FREGS+(22*8)(r31)
+	lfd	fp23,_UC_FREGS+(23*8)(r31)
+	lfd	fp24,_UC_FREGS+(24*8)(r31)
+	lfd	fp25,_UC_FREGS+(25*8)(r31)
+	lfd	fp26,_UC_FREGS+(26*8)(r31)
+	lfd	fp27,_UC_FREGS+(27*8)(r31)
+	lfd	fp28,_UC_FREGS+(28*8)(r31)
+	lfd	fp29,_UC_FREGS+(29*8)(r31)
+	lfd	fp30,_UC_FREGS+(30*8)(r31)
+	lfd	fp31,_UC_FREGS+(31*8)(r31)
+
+	/* Restore LR and CCR, and set CTR to the NIP value */
+	lwz	r3,_UC_GREGS+(PT_LNK*4)(r31)
+	lwz	r4,_UC_GREGS+(PT_NIP*4)(r31)
+	lwz	r5,_UC_GREGS+(PT_CCR*4)(r31)
+	mtlr	r3
+	mtctr	r4
+	mtcr	r5
+
+	/* Restore the general registers */
+	lwz	r1,_UC_GREGS+(PT_R1*4)(r31)
+	lwz	r3,_UC_GREGS+(PT_R3*4)(r31)
+	lwz	r4,_UC_GREGS+(PT_R4*4)(r31)
+	lwz	r5,_UC_GREGS+(PT_R5*4)(r31)
+	lwz	r6,_UC_GREGS+(PT_R6*4)(r31)
+	lwz	r7,_UC_GREGS+(PT_R7*4)(r31)
+	lwz	r8,_UC_GREGS+(PT_R8*4)(r31)
+	lwz	r9,_UC_GREGS+(PT_R9*4)(r31)
+	lwz	r10,_UC_GREGS+(PT_R10*4)(r31)
+	lwz	r11,_UC_GREGS+(PT_R11*4)(r31)
+	lwz	r12,_UC_GREGS+(PT_R12*4)(r31)
+	lwz	r13,_UC_GREGS+(PT_R13*4)(r31)
+	lwz	r14,_UC_GREGS+(PT_R14*4)(r31)
+	lwz	r15,_UC_GREGS+(PT_R15*4)(r31)
+	lwz	r16,_UC_GREGS+(PT_R16*4)(r31)
+	lwz	r17,_UC_GREGS+(PT_R17*4)(r31)
+	lwz	r18,_UC_GREGS+(PT_R18*4)(r31)
+	lwz	r19,_UC_GREGS+(PT_R19*4)(r31)
+	lwz	r20,_UC_GREGS+(PT_R20*4)(r31)
+	lwz	r21,_UC_GREGS+(PT_R21*4)(r31)
+	lwz	r22,_UC_GREGS+(PT_R22*4)(r31)
+	lwz	r23,_UC_GREGS+(PT_R23*4)(r31)
+	lwz	r24,_UC_GREGS+(PT_R24*4)(r31)
+	lwz	r25,_UC_GREGS+(PT_R25*4)(r31)
+	lwz	r26,_UC_GREGS+(PT_R26*4)(r31)
+	lwz	r27,_UC_GREGS+(PT_R27*4)(r31)
+	lwz	r28,_UC_GREGS+(PT_R28*4)(r31)
+	lwz	r29,_UC_GREGS+(PT_R29*4)(r31)
+	lwz	r30,_UC_GREGS+(PT_R30*4)(r31)
+	lwz	r31,_UC_GREGS+(PT_R31*4)(r31)
+
+	bctr
+
+L(error_exit):
+	lwz	r31,12(r1)
+	lwz	r0,20(r1)
+	addi	r1,r1,16
+	mtlr	r0
+	blr
+
+L(do_sigret):
+	addi	r1,r4,-0xd0
+	li	r0,SYS_ify(rt_sigreturn)
+	sc
+	/* NOTREACHED */
+
+PSEUDO_END(__swapcontext)
+
+versioned_symbol (libc, __swapcontext, swapcontext, GLIBC_2_3_4)
+
+#if SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4)
+
+ENTRY(__novec_swapcontext)
 	/* Save the current context */
 	addi	r3,r3,_UC_REG_SPACE
 	stw	r3,_UC_REGS_PTR - _UC_REG_SPACE(r3)
@@ -220,22 +669,24 @@ ENTRY(__swapcontext)
 
 	bctr
 
-L(error_exit):
+L(novec_error_exit):
 	lwz	r31,12(r1)
 	lwz	r0,20(r1)
 	addi	r1,r1,16
 	mtlr	r0
 	blr
 
-L(do_sigret):
+L(novec_do_sigret):
 	addi	r1,r4,-0xd0
 	li	r0,SYS_ify(rt_sigreturn)
 	sc
 	/* NOTREACHED */
 
-PSEUDO_END(__swapcontext)
+PSEUDO_END(__novec_swapcontext)
+
+compat_symbol (libc, __novec_swapcontext, swapcontext, GLIBC_2_3_3)
 
-versioned_symbol (libc, __swapcontext, swapcontext, GLIBC_2_3_3)
+#endif
 
 #if SHLIB_COMPAT (libc, GLIBC_2_1, GLIBC_2_3_3)
 
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/ucontext_i.h b/sysdeps/unix/sysv/linux/powerpc/powerpc32/ucontext_i.h
index 1ae082a3ef..e47b24a09e 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/ucontext_i.h
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/ucontext_i.h
@@ -21,6 +21,13 @@
 #define SIG_BLOCK	0
 #define SIG_SETMASK	2
 
+#define _FRAME_BACKCHAIN	0
+#define _FRAME_LR_SAVE	4
+#define _FRAME_PARM_SAVE1	8
+#define _FRAME_PARM_SAVE2	12
+#define _FRAME_PARM_SAVE3	16
+#define _FRAME_PARM_SAVE4	20
+
 #define _UC_LINK	4
 #define _UC_STACK_SP	8
 #define _UC_STACK_SIZE	16
@@ -32,3 +39,5 @@
 #define _UC_GREGS	0
 #define _UC_FREGS	192
 #define _UC_VREGS	464
+#define _UC_VSCR	976
+#define _UC_VRSAVE	980
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/Versions b/sysdeps/unix/sysv/linux/powerpc/powerpc64/Versions
index c3f9daad4c..8334741aec 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/Versions
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/Versions
@@ -14,4 +14,9 @@ libc {
     # s*
     scandir64; 
   }
+  GLIBC_2.3.4 {
+    getcontext;
+    setcontext; 
+    swapcontext;
+  }
 }
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S b/sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S
index 0ebf2d8727..279a36d68d 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S
@@ -1,5 +1,5 @@
 /* Save current context.
-   Copyright (C) 2002 Free Software Foundation, Inc.
+   Copyright (C) 2002, 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
@@ -18,6 +18,8 @@
    02111-1307 USA.  */
 
 #include <sysdep.h>
+#include <rtld-global-offsets.h>
+#include <shlib-compat.h>
 #include "kernel-features.h"
 
 #define __ASSEMBLY__
@@ -25,7 +27,9 @@
 #include <asm/errno.h>
 #include "ucontext_i.h"
 
-ENTRY(__getcontext)
+
+#if SHLIB_COMPAT (libc, GLIBC_2_3, GLIBC_2_3_4)
+ENTRY(__novec_getcontext)
 #ifdef __ASSUME_NEW_RT_SIGRETURN_SYSCALL
   std  r0,(SIGCONTEXT_GP_REGS+(PT_R0*8))(r3)
   std  r1,(SIGCONTEXT_GP_REGS+(PT_R1*8))(r3)
@@ -126,6 +130,255 @@ ENTRY(__getcontext)
   stfd  fp31,(SIGCONTEXT_FP_REGS+(PT_R31*8))(r3)
   stfd  fp0,(SIGCONTEXT_FP_REGS+(32*8))(r3)
 
+  addi  r5,r3,UCONTEXT_SIGMASK
+  li  r4,0
+  li  r3,SIG_BLOCK
+  bl  JUMPTARGET(sigprocmask)
+  nop
+#else
+  /* If the kernel is not at least 2.4.21 then generate a ENOSYS stub.  */
+  mflr r0
+  std  r0,FRAME_LR_SAVE(r1)
+  stdu r1,-128(r1)
+  li   r3,ENOSYS
+  bl   JUMPTARGET(__syscall_error)
+  nop
+  li   r3,-1
+#endif
+  
+  ld    r0,128+FRAME_LR_SAVE(r1)  
+  addi  r1,r1,128
+  mtlr  r0
+  blr
+PSEUDO_END(__novec_getcontext)
+
+compat_symbol (libc, __novec_getcontext, getcontext, GLIBC_2_3)
+
+#endif
+
+	.section	".toc","aw"
+.LC__dl_hwcap:
+#ifdef SHARED
+	.tc _rtld_global[TC],_rtld_global
+#else
+	.tc _dl_hwcap[TC],_dl_hwcap
+#endif	
+	.section ".text"
+
+ENTRY(__getcontext)
+#ifdef __ASSUME_NEW_RT_SIGRETURN_SYSCALL
+  std  r0,(SIGCONTEXT_GP_REGS+(PT_R0*8))(r3)
+  std  r1,(SIGCONTEXT_GP_REGS+(PT_R1*8))(r3)
+  mflr  r0
+  std  r2,(SIGCONTEXT_GP_REGS+(PT_R2*8))(r3)
+  std  r0,FRAME_LR_SAVE(r1)
+  std  r0,(SIGCONTEXT_GP_REGS+(PT_LNK*8))(r3)
+  std  r0,(SIGCONTEXT_GP_REGS+(PT_NIP*8))(r3)
+  stdu  r1,-128(r1)
+  std  r4,(SIGCONTEXT_GP_REGS+(PT_R4*8))(r3)
+  std  r5,(SIGCONTEXT_GP_REGS+(PT_R5*8))(r3)
+  std  r6,(SIGCONTEXT_GP_REGS+(PT_R6*8))(r3)
+  std  r7,(SIGCONTEXT_GP_REGS+(PT_R7*8))(r3)
+  std  r8,(SIGCONTEXT_GP_REGS+(PT_R8*8))(r3)
+  std  r9,(SIGCONTEXT_GP_REGS+(PT_R9*8))(r3)
+  std  r10,(SIGCONTEXT_GP_REGS+(PT_R10*8))(r3)
+  std  r11,(SIGCONTEXT_GP_REGS+(PT_R11*8))(r3)
+  std  r12,(SIGCONTEXT_GP_REGS+(PT_R12*8))(r3)
+  std  r13,(SIGCONTEXT_GP_REGS+(PT_R13*8))(r3)
+  std  r14,(SIGCONTEXT_GP_REGS+(PT_R14*8))(r3)
+  std  r15,(SIGCONTEXT_GP_REGS+(PT_R15*8))(r3)
+  std  r16,(SIGCONTEXT_GP_REGS+(PT_R16*8))(r3)
+  std  r17,(SIGCONTEXT_GP_REGS+(PT_R17*8))(r3)
+  std  r18,(SIGCONTEXT_GP_REGS+(PT_R18*8))(r3)
+  std  r19,(SIGCONTEXT_GP_REGS+(PT_R19*8))(r3)
+  std  r20,(SIGCONTEXT_GP_REGS+(PT_R20*8))(r3)
+  std  r21,(SIGCONTEXT_GP_REGS+(PT_R21*8))(r3)
+  std  r22,(SIGCONTEXT_GP_REGS+(PT_R22*8))(r3)
+  std  r23,(SIGCONTEXT_GP_REGS+(PT_R23*8))(r3)
+  std  r24,(SIGCONTEXT_GP_REGS+(PT_R24*8))(r3)
+  std  r25,(SIGCONTEXT_GP_REGS+(PT_R25*8))(r3)
+  std  r26,(SIGCONTEXT_GP_REGS+(PT_R26*8))(r3)
+  std  r27,(SIGCONTEXT_GP_REGS+(PT_R27*8))(r3)
+  std  r28,(SIGCONTEXT_GP_REGS+(PT_R28*8))(r3)
+  std  r29,(SIGCONTEXT_GP_REGS+(PT_R29*8))(r3)
+  std  r30,(SIGCONTEXT_GP_REGS+(PT_R30*8))(r3)
+  std  r31,(SIGCONTEXT_GP_REGS+(PT_R31*8))(r3)
+  mfctr  r0
+  std  r0,(SIGCONTEXT_GP_REGS+(PT_CTR*8))(r3)
+  mfxer  r0
+  std  r0,(SIGCONTEXT_GP_REGS+(PT_XER*8))(r3)
+  mfcr  r0
+  std  r0,(SIGCONTEXT_GP_REGS+(PT_CCR*8))(r3)
+  
+  /* Set the return value of swapcontext to "success".  R3 is the only 
+     register whose value is not preserved in the saved context.  */
+  li   r0,0
+  std  r0,(SIGCONTEXT_GP_REGS+(PT_R3*8))(r3)
+  
+  /* Zero fill fields that can't be set in user state or are unused.  */
+  std  r0,(SIGCONTEXT_GP_REGS+(PT_MSR*8))(r3)
+  std  r0,(SIGCONTEXT_GP_REGS+(34*8))(r3)
+  std  r0,(SIGCONTEXT_GP_REGS+(PT_SOFTE*8))(r3)
+  std  r0,(SIGCONTEXT_GP_REGS+(40*8))(r3)
+  std  r0,(SIGCONTEXT_GP_REGS+(41*8))(r3)
+  std  r0,(SIGCONTEXT_GP_REGS+(42*8))(r3)
+  std  r0,(SIGCONTEXT_GP_REGS+(PT_RESULT*8))(r3)
+  
+  /* Set the PT_REGS pointer to the address of sigcontext's gp_regs 
+     field.  Struct pt_regs and elf_gregset_t are the same thing.  
+     We kept the regs field for backwards compatibility with
+     libraries built before we extended sigcontext.  */
+  addi r0,r3,SIGCONTEXT_GP_REGS
+  std  r0,SIGCONTEXT_PT_REGS(r3)
+  
+  stfd  fp0,(SIGCONTEXT_FP_REGS+(PT_R0*8))(r3)
+  stfd  fp1,(SIGCONTEXT_FP_REGS+(PT_R1*8))(r3)
+  stfd  fp2,(SIGCONTEXT_FP_REGS+(PT_R2*8))(r3)
+  stfd  fp3,(SIGCONTEXT_FP_REGS+(PT_R3*8))(r3)
+  stfd  fp4,(SIGCONTEXT_FP_REGS+(PT_R4*8))(r3)
+  stfd  fp5,(SIGCONTEXT_FP_REGS+(PT_R5*8))(r3)
+  stfd  fp6,(SIGCONTEXT_FP_REGS+(PT_R6*8))(r3)
+  stfd  fp7,(SIGCONTEXT_FP_REGS+(PT_R7*8))(r3)
+  stfd  fp8,(SIGCONTEXT_FP_REGS+(PT_R8*8))(r3)
+  stfd  fp9,(SIGCONTEXT_FP_REGS+(PT_R9*8))(r3)
+  stfd  fp10,(SIGCONTEXT_FP_REGS+(PT_R10*8))(r3)
+  stfd  fp11,(SIGCONTEXT_FP_REGS+(PT_R11*8))(r3)
+  stfd  fp12,(SIGCONTEXT_FP_REGS+(PT_R12*8))(r3)
+  stfd  fp13,(SIGCONTEXT_FP_REGS+(PT_R13*8))(r3)
+  stfd  fp14,(SIGCONTEXT_FP_REGS+(PT_R14*8))(r3)
+  stfd  fp15,(SIGCONTEXT_FP_REGS+(PT_R15*8))(r3)
+  stfd  fp16,(SIGCONTEXT_FP_REGS+(PT_R16*8))(r3)
+  stfd  fp17,(SIGCONTEXT_FP_REGS+(PT_R17*8))(r3)
+  stfd  fp18,(SIGCONTEXT_FP_REGS+(PT_R18*8))(r3)
+  stfd  fp19,(SIGCONTEXT_FP_REGS+(PT_R19*8))(r3)
+  stfd  fp20,(SIGCONTEXT_FP_REGS+(PT_R20*8))(r3)
+  stfd  fp21,(SIGCONTEXT_FP_REGS+(PT_R21*8))(r3)
+  stfd  fp22,(SIGCONTEXT_FP_REGS+(PT_R22*8))(r3)
+  stfd  fp23,(SIGCONTEXT_FP_REGS+(PT_R23*8))(r3)
+  stfd  fp24,(SIGCONTEXT_FP_REGS+(PT_R24*8))(r3)
+  stfd  fp25,(SIGCONTEXT_FP_REGS+(PT_R25*8))(r3)
+  stfd  fp26,(SIGCONTEXT_FP_REGS+(PT_R26*8))(r3)
+  stfd  fp27,(SIGCONTEXT_FP_REGS+(PT_R27*8))(r3)
+  stfd  fp28,(SIGCONTEXT_FP_REGS+(PT_R28*8))(r3)
+  stfd  fp29,(SIGCONTEXT_GP_REGS+(PT_R29*8))(r3)
+  mffs  fp0
+  stfd  fp30,(SIGCONTEXT_FP_REGS+(PT_R30*8))(r3)
+  stfd  fp31,(SIGCONTEXT_FP_REGS+(PT_R31*8))(r3)
+  stfd  fp0,(SIGCONTEXT_FP_REGS+(32*8))(r3)
+  
+  ld    r5,.LC__dl_hwcap@toc(r2)
+  li    r10,0
+#ifdef SHARED  
+/* Load _rtld-global._dl_hwcap.  */
+  ld    r5,RTLD_GLOBAL_DL_HWCAP_OFFSET(r5) 
+#else  
+  ld    r5,0(r5) /* Load extern _dl_hwcap.  */
+#endif
+  andis.  r5,r5,(PPC_FEATURE_HAS_ALTIVEC >> 16)
+  beq   L(has_no_vec)
+  
+  la    r10,(SIGCONTEXT_V_RESERVE+8)(r3)
+  la    r9,(SIGCONTEXT_V_RESERVE+24)(r3)
+  clrrdi  r10,r10,4
+  clrrdi  r9,r9,4
+  
+  stvx  v0,0,r10  
+  stvx  v1,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v2,0,r10  
+  stvx  v3,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v4,0,r10  
+  stvx  v5,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v6,0,r10  
+  stvx  v7,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v8,0,r10  
+  stvx  v9,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v10,0,r10  
+  stvx  v11,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v12,0,r10  
+  stvx  v13,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v14,0,r10  
+  stvx  v15,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v16,0,r10  
+  stvx  v17,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v18,0,r10  
+  stvx  v11,0,r9
+  addi  r19,r10,32
+  addi  r9,r9,32
+  
+  stvx  v20,0,r10  
+  stvx  v21,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v22,0,r10  
+  stvx  v23,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v24,0,r10  
+  stvx  v25,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v26,0,r10  
+  stvx  v27,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v28,0,r10  
+  stvx  v29,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v30,0,r10  
+  stvx  v31,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v10,0,r10  
+  stvx  v11,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  mfvscr  v0
+  mfspr r0,VRSAVE
+  stvx  v0,0,r10
+  stw   r0,0(9)
+  
+L(has_no_vec):
+/* 
+   Store either a NULL or a quadword aligned pointer to the Vector register
+   array into *v_regs.
+*/
+  std   r10,(SIGCONTEXT_V_REGS_PTR)(r3)
+  
   addi  r5,r3,UCONTEXT_SIGMASK
   li  r4,0
   li  r3,SIG_BLOCK
@@ -148,4 +401,5 @@ ENTRY(__getcontext)
   blr
 PSEUDO_END(__getcontext)
 
-weak_alias(__getcontext, getcontext)
+versioned_symbol (libc, __getcontext, getcontext, GLIBC_2_3_4)
+
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S b/sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S
index 8487a3f522..bad67193d8 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S
@@ -1,5 +1,5 @@
 /* Create new context.
-   Copyright (C) 2002 Free Software Foundation, Inc.
+   Copyright (C) 2002, 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
@@ -54,8 +54,8 @@ ENTRY(__makecontext)
   add   r7,r7,r0
   clrrdi  r7,r7,4
   li    r0,0
-  stdu  r0,-48(r7)
-  std   r3,24(r7)
+  stdu  r0,-64(r7)
+  std   r3,FRAME_PARM1_SAVE(r7) /* Store context in dummy parm1.  */
   mflr  r0
   std   r2,FRAME_TOC_SAVE(r7)  /* Store the TOC pointer for later.  */
   std   r0,FRAME_LR_SAVE(r7)
@@ -135,7 +135,7 @@ L(noparms):
 L(exitcode):
    /* Recover the ucontext and TOC from the dummy frame.  */
   ld    r1,FRAME_BACKCHAIN(r1)  /* Unstack the parameter save area frame.  */
-  ld    r3,FRAME_COMPILER_DW(r1)
+  ld    r3,FRAME_PARM1_SAVE(r1)
   ld    r2,FRAME_TOC_SAVE(r1)
   ld    r3,UCONTEXT_LINK(r3)  /* Load the resume context.  */
   cmpdi r3,0
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S b/sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S
index 3e25a8e184..490eb27578 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S
@@ -1,5 +1,5 @@
 /* Switch to context.
-   Copyright (C) 2002 Free Software Foundation, Inc.
+   Copyright (C) 2002, 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
@@ -18,6 +18,8 @@
    02111-1307 USA.  */
 
 #include <sysdep.h>
+#include <rtld-global-offsets.h>
+#include <shlib-compat.h>
 #include "kernel-features.h"
 
 #define __ASSEMBLY__
@@ -25,6 +27,171 @@
 #include "ucontext_i.h"
 #include <asm/errno.h>
 
+#if SHLIB_COMPAT (libc, GLIBC_2_3, GLIBC_2_3_4)
+ENTRY(__novec_setcontext)
+#ifdef __ASSUME_NEW_RT_SIGRETURN_SYSCALL
+  mflr  r0
+  std   r31,-8(1)
+  std   r0,FRAME_LR_SAVE(r1)
+  stdu  r1,-128(r1)
+  mr    r31,r3
+
+/*
+ * If this ucontext refers to the point where we were interrupted
+ * by a signal, we have to use the rt_sigreturn system call to
+ * return to the context so we get both LR and CTR restored.
+ *
+ * Otherwise, the context we are restoring is either just after
+ * a procedure call (getcontext/swapcontext) or at the beginning
+ * of a procedure call (makecontext), so we don't need to restore
+ * msr and ctr.  We don't restore r13 since it will be used as
+ * the TLS pointer.  */
+  lwz	  r0,(SIGCONTEXT_GP_REGS+(PT_MSR*8))(r31)
+  cmpdi r0,0
+  bne	  L(nv_do_sigret)
+
+  li    r5,0
+  addi  r4,r3,UCONTEXT_SIGMASK
+  li    r3,SIG_SETMASK
+  bl    JUMPTARGET(sigprocmask)
+  nop
+  cmpdi r3,0
+  bne   L(nv_error_exit)
+
+  lfd  fp0,(SIGCONTEXT_FP_REGS+(32*8))(r31)
+  lfd  fp31,(SIGCONTEXT_FP_REGS+(PT_R31*8))(r31)	
+  lfd  fp30,(SIGCONTEXT_FP_REGS+(PT_R30*8))(r31)
+  mtfsf  0xff,fp0
+  lfd  fp29,(SIGCONTEXT_FP_REGS+(PT_R29*8))(r31)	
+  lfd  fp28,(SIGCONTEXT_FP_REGS+(PT_R28*8))(r31)
+  lfd  fp27,(SIGCONTEXT_FP_REGS+(PT_R27*8))(r31)	
+  lfd  fp26,(SIGCONTEXT_FP_REGS+(PT_R26*8))(r31)
+  lfd  fp25,(SIGCONTEXT_FP_REGS+(PT_R25*8))(r31)	
+  lfd  fp24,(SIGCONTEXT_FP_REGS+(PT_R24*8))(r31)
+  lfd  fp23,(SIGCONTEXT_FP_REGS+(PT_R23*8))(r31)	
+  lfd  fp22,(SIGCONTEXT_FP_REGS+(PT_R22*8))(r31)
+  lfd  fp21,(SIGCONTEXT_FP_REGS+(PT_R21*8))(r31)	
+  lfd  fp20,(SIGCONTEXT_FP_REGS+(PT_R20*8))(r31)
+  lfd  fp19,(SIGCONTEXT_FP_REGS+(PT_R19*8))(r31)	
+  lfd  fp18,(SIGCONTEXT_FP_REGS+(PT_R18*8))(r31)
+  lfd  fp17,(SIGCONTEXT_FP_REGS+(PT_R17*8))(r31)	
+  lfd  fp16,(SIGCONTEXT_FP_REGS+(PT_R16*8))(r31)
+  lfd  fp15,(SIGCONTEXT_FP_REGS+(PT_R15*8))(r31)	
+  lfd  fp14,(SIGCONTEXT_FP_REGS+(PT_R14*8))(r31)
+  lfd  fp13,(SIGCONTEXT_FP_REGS+(PT_R13*8))(r31)	
+  lfd  fp12,(SIGCONTEXT_FP_REGS+(PT_R12*8))(r31)
+  lfd  fp11,(SIGCONTEXT_FP_REGS+(PT_R11*8))(r31)	
+  lfd  fp10,(SIGCONTEXT_FP_REGS+(PT_R10*8))(r31)
+  lfd  fp9,(SIGCONTEXT_FP_REGS+(PT_R9*8))(r31)	
+  lfd  fp8,(SIGCONTEXT_FP_REGS+(PT_R8*8))(r31)
+  lfd  fp7,(SIGCONTEXT_FP_REGS+(PT_R7*8))(r31)	
+  lfd  fp6,(SIGCONTEXT_FP_REGS+(PT_R6*8))(r31)
+  lfd  fp5,(SIGCONTEXT_FP_REGS+(PT_R5*8))(r31)	
+  lfd  fp4,(SIGCONTEXT_FP_REGS+(PT_R4*8))(r31)
+  lfd  fp3,(SIGCONTEXT_FP_REGS+(PT_R3*8))(r31)	
+  lfd  fp2,(SIGCONTEXT_FP_REGS+(PT_R2*8))(r31)
+  lfd  fp1,(SIGCONTEXT_FP_REGS+(PT_R1*8))(r31)	
+  lfd  fp0,(SIGCONTEXT_FP_REGS+(PT_R0*8))(r31)
+  
+  ld   r0,(SIGCONTEXT_GP_REGS+(PT_LNK*8))(r31)  
+  ld   r1,(SIGCONTEXT_GP_REGS+(PT_R1*8))(r31)
+  mtlr r0
+  ld   r2,(SIGCONTEXT_GP_REGS+(PT_R2*8))(r31)
+  ld   r0,(SIGCONTEXT_GP_REGS+(PT_XER*8))(r31)
+  ld   r3,(SIGCONTEXT_GP_REGS+(PT_R3*8))(r31)
+  mtxer r0
+  ld   r4,(SIGCONTEXT_GP_REGS+(PT_R4*8))(r31)
+  ld   r0,(SIGCONTEXT_GP_REGS+(PT_CCR*8))(r31)
+  ld   r5,(SIGCONTEXT_GP_REGS+(PT_R5*8))(r31)
+  mfcr r0
+  ld   r6,(SIGCONTEXT_GP_REGS+(PT_R6*8))(r31)
+  ld   r7,(SIGCONTEXT_GP_REGS+(PT_R7*8))(r31)
+  ld   r8,(SIGCONTEXT_GP_REGS+(PT_R8*8))(r31)
+  ld   r9,(SIGCONTEXT_GP_REGS+(PT_R9*8))(r31)
+  ld   r10,(SIGCONTEXT_GP_REGS+(PT_R10*8))(r31)
+  ld   r11,(SIGCONTEXT_GP_REGS+(PT_R11*8))(r31)
+  ld   r12,(SIGCONTEXT_GP_REGS+(PT_R12*8))(r31)
+  /* Don't reload the thread ID or TLS pointer (r13).  */
+  ld   r14,(SIGCONTEXT_GP_REGS+(PT_R14*8))(r31)
+  ld   r15,(SIGCONTEXT_GP_REGS+(PT_R15*8))(r31)
+  ld   r16,(SIGCONTEXT_GP_REGS+(PT_R16*8))(r31)
+  ld   r17,(SIGCONTEXT_GP_REGS+(PT_R17*8))(r31)
+  ld   r18,(SIGCONTEXT_GP_REGS+(PT_R18*8))(r31)
+  ld   r19,(SIGCONTEXT_GP_REGS+(PT_R19*8))(r31)
+  ld   r20,(SIGCONTEXT_GP_REGS+(PT_R20*8))(r31)
+  ld   r21,(SIGCONTEXT_GP_REGS+(PT_R21*8))(r31)
+  ld   r22,(SIGCONTEXT_GP_REGS+(PT_R22*8))(r31)
+  ld   r23,(SIGCONTEXT_GP_REGS+(PT_R23*8))(r31)
+  ld   r24,(SIGCONTEXT_GP_REGS+(PT_R24*8))(r31)
+  ld   r25,(SIGCONTEXT_GP_REGS+(PT_R25*8))(r31)
+  ld   r26,(SIGCONTEXT_GP_REGS+(PT_R26*8))(r31)
+  ld   r27,(SIGCONTEXT_GP_REGS+(PT_R27*8))(r31)
+  ld   r28,(SIGCONTEXT_GP_REGS+(PT_R28*8))(r31)
+  ld   r29,(SIGCONTEXT_GP_REGS+(PT_R29*8))(r31)
+  ld   r30,(SIGCONTEXT_GP_REGS+(PT_R30*8))(r31)
+  
+  /* Now we branch to the "Next Instruction Pointer" from the saved
+     context.  With the powerpc64 instruction set there is no good way to 
+     do this (from user state) without clobbering either the LR or CTR.
+     The makecontext and swapcontext functions depend on the callers 
+     LR being preserved so we use the CTR.  */
+  ld   r0,(SIGCONTEXT_GP_REGS+(PT_NIP*8))(r31)
+  mtctr r0
+  ld   r0,(SIGCONTEXT_GP_REGS+(PT_R0*8))(r31)
+  ld   r31,(SIGCONTEXT_GP_REGS+(PT_R31*8))(r31)
+  bctr
+  
+L(nv_error_exit):
+  ld   r0,128+FRAME_LR_SAVE(r1)  
+  addi r1,r1,128
+  mtlr r0
+	ld   r31,-8(r1)
+  blr
+
+  /* At this point we assume that the ucontext was created by a 
+     rt_signal and we should use rt_sigreturn to restore the original 
+     state.  As of the 2.4.21 kernel the ucontext is the first thing 
+     (offset 0) in the rt_signal frame and rt_sigreturn expects the 
+     ucontext address in R1.  Normally the rt-signal trampoline handles 
+     this by popping dummy frame before the rt_signal syscall.  In our 
+     case the stack may not be in its original (signal handler return with 
+     R1 pointing at the dummy frame) state.  We do have the ucontext 
+     address in R3, so simply copy R3 to R1 before the syscall.  */
+L(nv_do_sigret):
+  mr   r1,r3,
+  li   r0,SYS_ify(rt_sigreturn)
+  sc
+  /* No return.  */
+#else
+  /* If the kernel is not at least 2.4.21 then generate a ENOSYS stub.  */
+  mflr r0
+  std  r0,FRAME_LR_SAVE(r1)
+  stdu r1,-128(r1)
+  li   r3,ENOSYS
+  bl   JUMPTARGET(__syscall_error)
+  nop
+  li   r3,-1
+  ld   r0,128+FRAME_LR_SAVE(r1)  
+  addi r1,r1,128
+  mtlr r0
+  blr
+#endif
+
+PSEUDO_END(__novec_setcontext)
+
+compat_symbol (libc, __novec_setcontext, setcontext, GLIBC_2_3)
+
+#endif
+
+	.section	".toc","aw"
+.LC__dl_hwcap:
+#ifdef SHARED
+	.tc _rtld_global[TC],_rtld_global
+#else
+	.tc _dl_hwcap[TC],_dl_hwcap
+#endif
+	.section ".text"
+
 ENTRY(__setcontext)
 #ifdef __ASSUME_NEW_RT_SIGRETURN_SYSCALL
   mflr  r0
@@ -54,7 +221,117 @@ ENTRY(__setcontext)
   nop
   cmpdi r3,0
   bne   L(error_exit)
-
+  
+  ld    r5,.LC__dl_hwcap@toc(r2)
+  ld    r10,(SIGCONTEXT_V_REGS_PTR)(r31)
+#ifdef SHARED  
+/* Load _rtld-global._dl_hwcap.  */
+  ld    r5,RTLD_GLOBAL_DL_HWCAP_OFFSET(r5) 
+#else  
+  ld    r5,0(r5) /* Load extern _dl_hwcap.  */
+#endif
+  andis.  r5,r5,(PPC_FEATURE_HAS_ALTIVEC >> 16)
+  beq   L(has_no_vec)
+  
+  cmpdi r10,0
+  beq   L(has_no_vec)
+  lwz   r0,(33*16)(r10)
+  
+  li    r9,(16*32)
+  mtspr VRSAVE,r0
+  cmpwi r0,0
+  beq   L(has_no_vec)  
+  
+  lvx   v19,r9,r10
+  la    r9,(16)(r10)
+  
+  lvx   v0,0,r10  
+  lvx   v1,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  mtvscr  v19
+  lvx   v2,0,r10  
+  lvx   v3,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v4,0,r10  
+  lvx   v5,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v6,0,r10  
+  lvx   v7,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v8,0,r10  
+  lvx   v9,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v10,0,r10  
+  lvx   v11,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v12,0,r10  
+  lvx   v13,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v14,0,r10  
+  lvx   v15,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v16,0,r10  
+  lvx   v17,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v18,0,r10  
+  lvx   v11,0,r9
+  addi  r19,r10,32
+  addi  r9,r9,32
+  
+  lvx   v20,0,r10  
+  lvx   v21,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v22,0,r10  
+  lvx   v23,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v24,0,r10  
+  lvx   v25,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v26,0,r10  
+  lvx   v27,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v28,0,r10  
+  lvx   v29,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v30,0,r10  
+  lvx   v31,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v10,0,r10  
+  lvx   v11,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+L(has_no_vec):
   lfd  fp0,(SIGCONTEXT_FP_REGS+(32*8))(r31)
   lfd  fp31,(SIGCONTEXT_FP_REGS+(PT_R31*8))(r31)	
   lfd  fp30,(SIGCONTEXT_FP_REGS+(PT_R30*8))(r31)
@@ -176,4 +453,4 @@ L(do_sigret):
 
 PSEUDO_END(__setcontext)
 
-weak_alias(__setcontext, setcontext)
+versioned_symbol (libc, __setcontext, setcontext, GLIBC_2_3_4)
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S b/sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S
index 653811bda2..ab6a6254f9 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S
@@ -1,5 +1,5 @@
 /* Save current context and install the given one.
-   Copyright (C) 2002 Free Software Foundation, Inc.
+   Copyright (C) 2002, 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
@@ -18,6 +18,8 @@
    02111-1307 USA.  */
 
 #include <sysdep.h>
+#include <rtld-global-offsets.h>
+#include <shlib-compat.h>
 #include "kernel-features.h"
 
 #define __ASSEMBLY__
@@ -25,6 +27,266 @@
 #include "ucontext_i.h"
 #include <asm/errno.h>
 
+#if SHLIB_COMPAT (libc, GLIBC_2_3, GLIBC_2_3_4)
+ENTRY(__novec_swapcontext)
+#ifdef __ASSUME_NEW_RT_SIGRETURN_SYSCALL
+  std  r0,(SIGCONTEXT_GP_REGS+(PT_R0*8))(r3)
+  std  r1,(SIGCONTEXT_GP_REGS+(PT_R1*8))(r3)
+  mflr  r0
+  std   r31,-8(1)
+  std  r2,(SIGCONTEXT_GP_REGS+(PT_R2*8))(r3)
+  std  r0,FRAME_LR_SAVE(r1)
+  std  r0,(SIGCONTEXT_GP_REGS+(PT_LNK*8))(r3)
+  std  r0,(SIGCONTEXT_GP_REGS+(PT_NIP*8))(r3)
+  stdu  r1,-128(r1)
+  std  r4,(SIGCONTEXT_GP_REGS+(PT_R4*8))(r3)
+  std  r5,(SIGCONTEXT_GP_REGS+(PT_R5*8))(r3)
+  std  r6,(SIGCONTEXT_GP_REGS+(PT_R6*8))(r3)
+  std  r7,(SIGCONTEXT_GP_REGS+(PT_R7*8))(r3)
+  std  r8,(SIGCONTEXT_GP_REGS+(PT_R8*8))(r3)
+  std  r9,(SIGCONTEXT_GP_REGS+(PT_R9*8))(r3)
+  std  r10,(SIGCONTEXT_GP_REGS+(PT_R10*8))(r3)
+  std  r11,(SIGCONTEXT_GP_REGS+(PT_R11*8))(r3)
+  std  r12,(SIGCONTEXT_GP_REGS+(PT_R12*8))(r3)
+  std  r13,(SIGCONTEXT_GP_REGS+(PT_R13*8))(r3)
+  std  r14,(SIGCONTEXT_GP_REGS+(PT_R14*8))(r3)
+  std  r15,(SIGCONTEXT_GP_REGS+(PT_R15*8))(r3)
+  std  r16,(SIGCONTEXT_GP_REGS+(PT_R16*8))(r3)
+  std  r17,(SIGCONTEXT_GP_REGS+(PT_R17*8))(r3)
+  std  r18,(SIGCONTEXT_GP_REGS+(PT_R18*8))(r3)
+  std  r19,(SIGCONTEXT_GP_REGS+(PT_R19*8))(r3)
+  std  r20,(SIGCONTEXT_GP_REGS+(PT_R20*8))(r3)
+  std  r21,(SIGCONTEXT_GP_REGS+(PT_R21*8))(r3)
+  std  r22,(SIGCONTEXT_GP_REGS+(PT_R22*8))(r3)
+  std  r23,(SIGCONTEXT_GP_REGS+(PT_R23*8))(r3)
+  std  r24,(SIGCONTEXT_GP_REGS+(PT_R24*8))(r3)
+  std  r25,(SIGCONTEXT_GP_REGS+(PT_R25*8))(r3)
+  std  r26,(SIGCONTEXT_GP_REGS+(PT_R26*8))(r3)
+  std  r27,(SIGCONTEXT_GP_REGS+(PT_R27*8))(r3)
+  std  r28,(SIGCONTEXT_GP_REGS+(PT_R28*8))(r3)
+  std  r29,(SIGCONTEXT_GP_REGS+(PT_R29*8))(r3)
+  std  r30,(SIGCONTEXT_GP_REGS+(PT_R30*8))(r3)
+  std  r31,(SIGCONTEXT_GP_REGS+(PT_R31*8))(r3)
+  mfctr  r0
+  std  r0,(SIGCONTEXT_GP_REGS+(PT_CTR*8))(r3)
+  mfxer  r0
+  std  r0,(SIGCONTEXT_GP_REGS+(PT_XER*8))(r3)
+  mfcr  r0
+  std  r0,(SIGCONTEXT_GP_REGS+(PT_CCR*8))(r3)
+  
+  /* Set the return value of swapcontext to "success".  R3 is the only 
+     register whose value is not preserved in the saved context.  */
+  li   r0,0
+  std  r0,(SIGCONTEXT_GP_REGS+(PT_R3*8))(r3)
+  
+  /* Zero fill fields that can't be set in user state or are unused.  */
+  std  r0,(SIGCONTEXT_GP_REGS+(PT_MSR*8))(r3)
+  std  r0,(SIGCONTEXT_GP_REGS+(34*8))(r3)
+  std  r0,(SIGCONTEXT_GP_REGS+(PT_SOFTE*8))(r3)
+  std  r0,(SIGCONTEXT_GP_REGS+(40*8))(r3)
+  std  r0,(SIGCONTEXT_GP_REGS+(41*8))(r3)
+  std  r0,(SIGCONTEXT_GP_REGS+(42*8))(r3)
+  std  r0,(SIGCONTEXT_GP_REGS+(PT_RESULT*8))(r3)
+  
+  /* Set the PT_REGS pointer to the address of sigcontext gp_regs 
+     field.  Struct pt_regs and elf_gregset_t are the same thing.  
+     We kept the regs field for backwards compatibility with
+     libraries built before we extended sigcontext.  */
+  addi r0,r3,SIGCONTEXT_GP_REGS
+  std  r0,SIGCONTEXT_PT_REGS(r3)
+  
+  stfd  fp0,(SIGCONTEXT_FP_REGS+(PT_R0*8))(r3)
+  stfd  fp1,(SIGCONTEXT_FP_REGS+(PT_R1*8))(r3)
+  stfd  fp2,(SIGCONTEXT_FP_REGS+(PT_R2*8))(r3)
+  stfd  fp3,(SIGCONTEXT_FP_REGS+(PT_R3*8))(r3)
+  stfd  fp4,(SIGCONTEXT_FP_REGS+(PT_R4*8))(r3)
+  stfd  fp5,(SIGCONTEXT_FP_REGS+(PT_R5*8))(r3)
+  stfd  fp6,(SIGCONTEXT_FP_REGS+(PT_R6*8))(r3)
+  stfd  fp7,(SIGCONTEXT_FP_REGS+(PT_R7*8))(r3)
+  stfd  fp8,(SIGCONTEXT_FP_REGS+(PT_R8*8))(r3)
+  stfd  fp9,(SIGCONTEXT_FP_REGS+(PT_R9*8))(r3)
+  stfd  fp10,(SIGCONTEXT_FP_REGS+(PT_R10*8))(r3)
+  stfd  fp11,(SIGCONTEXT_FP_REGS+(PT_R11*8))(r3)
+  stfd  fp12,(SIGCONTEXT_FP_REGS+(PT_R12*8))(r3)
+  stfd  fp13,(SIGCONTEXT_FP_REGS+(PT_R13*8))(r3)
+  stfd  fp14,(SIGCONTEXT_FP_REGS+(PT_R14*8))(r3)
+  stfd  fp15,(SIGCONTEXT_FP_REGS+(PT_R15*8))(r3)
+  stfd  fp16,(SIGCONTEXT_FP_REGS+(PT_R16*8))(r3)
+  stfd  fp17,(SIGCONTEXT_FP_REGS+(PT_R17*8))(r3)
+  stfd  fp18,(SIGCONTEXT_FP_REGS+(PT_R18*8))(r3)
+  stfd  fp19,(SIGCONTEXT_FP_REGS+(PT_R19*8))(r3)
+  stfd  fp20,(SIGCONTEXT_FP_REGS+(PT_R20*8))(r3)
+  stfd  fp21,(SIGCONTEXT_FP_REGS+(PT_R21*8))(r3)
+  stfd  fp22,(SIGCONTEXT_FP_REGS+(PT_R22*8))(r3)
+  stfd  fp23,(SIGCONTEXT_FP_REGS+(PT_R23*8))(r3)
+  stfd  fp24,(SIGCONTEXT_FP_REGS+(PT_R24*8))(r3)
+  stfd  fp25,(SIGCONTEXT_FP_REGS+(PT_R25*8))(r3)
+  stfd  fp26,(SIGCONTEXT_FP_REGS+(PT_R26*8))(r3)
+  stfd  fp27,(SIGCONTEXT_FP_REGS+(PT_R27*8))(r3)
+  stfd  fp28,(SIGCONTEXT_FP_REGS+(PT_R28*8))(r3)
+  stfd  fp29,(SIGCONTEXT_GP_REGS+(PT_R29*8))(r3)
+  mffs  fp0
+  stfd  fp30,(SIGCONTEXT_FP_REGS+(PT_R30*8))(r3)
+  stfd  fp31,(SIGCONTEXT_FP_REGS+(PT_R31*8))(r3)
+  stfd  fp0,(SIGCONTEXT_FP_REGS+(32*8))(r3)
+
+  mr    r31,r4
+  addi  r5,r3,UCONTEXT_SIGMASK
+  addi  r4,r4,UCONTEXT_SIGMASK
+  li    r3,SIG_SETMASK
+  bl    JUMPTARGET(sigprocmask)
+  nop
+  cmpdi  r3,0
+  bne   L(nv_error_exit)
+
+/*
+ * If this new ucontext refers to the point where we were interrupted
+ * by a signal, we have to use the rt_sigreturn system call to
+ * return to the context so we get both LR and CTR restored.
+ *
+ * Otherwise, the context we are restoring is either just after
+ * a procedure call (getcontext/swapcontext) or at the beginning
+ * of a procedure call (makecontext), so we don't need to restore
+ * msr and ctr.  We don't restore r13 since it will be used as
+ * the TLS pointer.  */
+  lwz	  r0,(SIGCONTEXT_GP_REGS+(PT_MSR*8))(r31)
+  cmpdi r0,0
+  bne	  L(nv_do_sigret)
+
+  lfd  fp0,(SIGCONTEXT_FP_REGS+(32*8))(r31)
+  lfd  fp31,(SIGCONTEXT_FP_REGS+(PT_R31*8))(r31)	
+  lfd  fp30,(SIGCONTEXT_FP_REGS+(PT_R30*8))(r31)
+  mtfsf  0xff,fp0
+  lfd  fp29,(SIGCONTEXT_FP_REGS+(PT_R29*8))(r31)	
+  lfd  fp28,(SIGCONTEXT_FP_REGS+(PT_R28*8))(r31)
+  lfd  fp27,(SIGCONTEXT_FP_REGS+(PT_R27*8))(r31)	
+  lfd  fp26,(SIGCONTEXT_FP_REGS+(PT_R26*8))(r31)
+  lfd  fp25,(SIGCONTEXT_FP_REGS+(PT_R25*8))(r31)	
+  lfd  fp24,(SIGCONTEXT_FP_REGS+(PT_R24*8))(r31)
+  lfd  fp23,(SIGCONTEXT_FP_REGS+(PT_R23*8))(r31)	
+  lfd  fp22,(SIGCONTEXT_FP_REGS+(PT_R22*8))(r31)
+  lfd  fp21,(SIGCONTEXT_FP_REGS+(PT_R21*8))(r31)	
+  lfd  fp20,(SIGCONTEXT_FP_REGS+(PT_R20*8))(r31)
+  lfd  fp19,(SIGCONTEXT_FP_REGS+(PT_R19*8))(r31)	
+  lfd  fp18,(SIGCONTEXT_FP_REGS+(PT_R18*8))(r31)
+  lfd  fp17,(SIGCONTEXT_FP_REGS+(PT_R17*8))(r31)	
+  lfd  fp16,(SIGCONTEXT_FP_REGS+(PT_R16*8))(r31)
+  lfd  fp15,(SIGCONTEXT_FP_REGS+(PT_R15*8))(r31)	
+  lfd  fp14,(SIGCONTEXT_FP_REGS+(PT_R14*8))(r31)
+  lfd  fp13,(SIGCONTEXT_FP_REGS+(PT_R13*8))(r31)	
+  lfd  fp12,(SIGCONTEXT_FP_REGS+(PT_R12*8))(r31)
+  lfd  fp11,(SIGCONTEXT_FP_REGS+(PT_R11*8))(r31)	
+  lfd  fp10,(SIGCONTEXT_FP_REGS+(PT_R10*8))(r31)
+  lfd  fp9,(SIGCONTEXT_FP_REGS+(PT_R9*8))(r31)	
+  lfd  fp8,(SIGCONTEXT_FP_REGS+(PT_R8*8))(r31)
+  lfd  fp7,(SIGCONTEXT_FP_REGS+(PT_R7*8))(r31)	
+  lfd  fp6,(SIGCONTEXT_FP_REGS+(PT_R6*8))(r31)
+  lfd  fp5,(SIGCONTEXT_FP_REGS+(PT_R5*8))(r31)	
+  lfd  fp4,(SIGCONTEXT_FP_REGS+(PT_R4*8))(r31)
+  lfd  fp3,(SIGCONTEXT_FP_REGS+(PT_R3*8))(r31)	
+  lfd  fp2,(SIGCONTEXT_FP_REGS+(PT_R2*8))(r31)
+  lfd  fp1,(SIGCONTEXT_FP_REGS+(PT_R1*8))(r31)	
+  lfd  fp0,(SIGCONTEXT_FP_REGS+(PT_R0*8))(r31)
+  
+  ld   r0,(SIGCONTEXT_GP_REGS+(PT_LNK*8))(r31)  
+  ld   r1,(SIGCONTEXT_GP_REGS+(PT_R1*8))(r31)
+  mtlr r0
+  ld   r2,(SIGCONTEXT_GP_REGS+(PT_R2*8))(r31)
+  ld   r0,(SIGCONTEXT_GP_REGS+(PT_XER*8))(r31)
+  ld   r3,(SIGCONTEXT_GP_REGS+(PT_R3*8))(r31)
+  mtxer r0
+  ld   r4,(SIGCONTEXT_GP_REGS+(PT_R4*8))(r31)
+  ld   r0,(SIGCONTEXT_GP_REGS+(PT_CCR*8))(r31)
+  ld   r5,(SIGCONTEXT_GP_REGS+(PT_R5*8))(r31)
+  mfcr r0
+  ld   r6,(SIGCONTEXT_GP_REGS+(PT_R6*8))(r31)
+  ld   r7,(SIGCONTEXT_GP_REGS+(PT_R7*8))(r31)
+  ld   r8,(SIGCONTEXT_GP_REGS+(PT_R8*8))(r31)
+  ld   r9,(SIGCONTEXT_GP_REGS+(PT_R9*8))(r31)
+  ld   r10,(SIGCONTEXT_GP_REGS+(PT_R10*8))(r31)
+  ld   r11,(SIGCONTEXT_GP_REGS+(PT_R11*8))(r31)
+  ld   r12,(SIGCONTEXT_GP_REGS+(PT_R12*8))(r31)
+  /* Don't reload the thread ID or TLS pointer (r13).  */
+  ld   r14,(SIGCONTEXT_GP_REGS+(PT_R14*8))(r31)
+  ld   r15,(SIGCONTEXT_GP_REGS+(PT_R15*8))(r31)
+  ld   r16,(SIGCONTEXT_GP_REGS+(PT_R16*8))(r31)
+  ld   r17,(SIGCONTEXT_GP_REGS+(PT_R17*8))(r31)
+  ld   r18,(SIGCONTEXT_GP_REGS+(PT_R18*8))(r31)
+  ld   r19,(SIGCONTEXT_GP_REGS+(PT_R19*8))(r31)
+  ld   r20,(SIGCONTEXT_GP_REGS+(PT_R20*8))(r31)
+  ld   r21,(SIGCONTEXT_GP_REGS+(PT_R21*8))(r31)
+  ld   r22,(SIGCONTEXT_GP_REGS+(PT_R22*8))(r31)
+  ld   r23,(SIGCONTEXT_GP_REGS+(PT_R23*8))(r31)
+  ld   r24,(SIGCONTEXT_GP_REGS+(PT_R24*8))(r31)
+  ld   r25,(SIGCONTEXT_GP_REGS+(PT_R25*8))(r31)
+  ld   r26,(SIGCONTEXT_GP_REGS+(PT_R26*8))(r31)
+  ld   r27,(SIGCONTEXT_GP_REGS+(PT_R27*8))(r31)
+  ld   r28,(SIGCONTEXT_GP_REGS+(PT_R28*8))(r31)
+  ld   r29,(SIGCONTEXT_GP_REGS+(PT_R29*8))(r31)
+  ld   r30,(SIGCONTEXT_GP_REGS+(PT_R30*8))(r31)
+    
+  /* Now we branch to the "Next Instruction Pointer" from the saved
+     context.  With the powerpc64 instruction set there is no good way to 
+     do this (from user state) without clobbering either the LR or CTR.
+     The makecontext and swapcontext functions depend on the callers 
+     LR being preserved so we use the CTR.  */
+  ld   r0,(SIGCONTEXT_GP_REGS+(PT_NIP*8))(r31)
+  mtctr r0
+  ld   r0,(SIGCONTEXT_GP_REGS+(PT_R0*8))(r31)
+  ld   r31,(SIGCONTEXT_GP_REGS+(PT_R31*8))(r31)
+  bctr
+  
+L(nv_error_exit):
+  ld    r0,128+FRAME_LR_SAVE(r1)  
+  addi  r1,r1,128
+  mtlr  r0
+  ld    r31,-8(r1)
+  blr
+
+  /* At this point we assume that the ucontext was created by a 
+     rt_signal and we should use rt_sigreturn to restore the original 
+     state.  As of the 2.4.21 kernel the ucontext is the first thing 
+     (offset 0) in the rt_signal frame and rt_sigreturn expects the 
+     ucontext address in R1.  Normally the rt-signal trampoline handles 
+     this by popping dummy frame before the rt_signal syscall.  In our 
+     case the stack may not be in its original (signal handler return with 
+     R1 pointing at the dummy frame) state.  We do have the ucontext 
+     address in R3, so simply copy R3 to R1 before the syscall.  */
+L(nv_do_sigret):
+  mr   r1,r3,
+  li   r0,SYS_ify(rt_sigreturn)
+  sc
+  /* No return.  */
+#else
+  /* If the kernel is not at least 2.4.21 then generate a ENOSYS stub.  */
+  mflr r0
+  std  r0,FRAME_LR_SAVE(r1)
+  stdu r1,-128(r1)
+  li   r3,ENOSYS
+  bl   JUMPTARGET(__syscall_error)
+  nop
+  li   r3,-1
+  ld   r0,128+FRAME_LR_SAVE(r1)  
+  addi r1,r1,128
+  mtlr r0
+  blr
+#endif  
+
+PSEUDO_END(__novec_swapcontext)
+
+compat_symbol (libc, __novec_swapcontext, swapcontext, GLIBC_2_3)
+
+#endif
+
+	.section	".toc","aw"
+.LC__dl_hwcap:
+#ifdef SHARED
+	.tc _rtld_global[TC],_rtld_global
+#else
+	.tc _dl_hwcap[TC],_dl_hwcap
+#endif
+	.section ".text"
+	
 ENTRY(__swapcontext)
 #ifdef __ASSUME_NEW_RT_SIGRETURN_SYSCALL
   std  r0,(SIGCONTEXT_GP_REGS+(PT_R0*8))(r3)
@@ -126,6 +388,119 @@ ENTRY(__swapcontext)
   stfd  fp30,(SIGCONTEXT_FP_REGS+(PT_R30*8))(r3)
   stfd  fp31,(SIGCONTEXT_FP_REGS+(PT_R31*8))(r3)
   stfd  fp0,(SIGCONTEXT_FP_REGS+(32*8))(r3)
+  
+  ld    r8,.LC__dl_hwcap@toc(r2)
+  li    r10,0
+#ifdef SHARED  
+/* Load _rtld-global._dl_hwcap.  */
+  ld    r8,RTLD_GLOBAL_DL_HWCAP_OFFSET(r8) 
+#else  
+  ld    r8,0(r8) /* Load extern _dl_hwcap.  */
+#endif
+  andis.  r8,r8,(PPC_FEATURE_HAS_ALTIVEC >> 16)
+  beq   L(has_no_vec)
+  
+  la    r10,(SIGCONTEXT_V_RESERVE+8)(r3)
+  la    r9,(SIGCONTEXT_V_RESERVE+24)(r3)
+  clrrdi  r10,r10,4
+  clrrdi  r9,r9,4
+  
+  stvx  v0,0,r10  
+  stvx  v1,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v2,0,r10  
+  stvx  v3,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v4,0,r10  
+  stvx  v5,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v6,0,r10  
+  stvx  v7,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v8,0,r10  
+  stvx  v9,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v10,0,r10  
+  stvx  v11,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v12,0,r10  
+  stvx  v13,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v14,0,r10  
+  stvx  v15,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v16,0,r10  
+  stvx  v17,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v18,0,r10  
+  stvx  v11,0,r9
+  addi  r19,r10,32
+  addi  r9,r9,32
+  
+  stvx  v20,0,r10  
+  stvx  v21,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v22,0,r10  
+  stvx  v23,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v24,0,r10  
+  stvx  v25,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v26,0,r10  
+  stvx  v27,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v28,0,r10  
+  stvx  v29,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v30,0,r10  
+  stvx  v31,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  stvx  v10,0,r10  
+  stvx  v11,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  mfvscr  v0
+  mfspr r0,VRSAVE
+  stvx  v0,0,r10
+  stw   r0,0(9)
+  
+L(has_no_vec):
+/* 
+   Store either a NULL or a quadword aligned pointer to the Vector register
+   array into *v_regs.
+*/
+  std   r10,(SIGCONTEXT_V_REGS_PTR)(r3)
 
   mr    r31,r4
   addi  r5,r3,UCONTEXT_SIGMASK
@@ -149,6 +524,117 @@ ENTRY(__swapcontext)
   lwz	  r0,(SIGCONTEXT_GP_REGS+(PT_MSR*8))(r31)
   cmpdi r0,0
   bne	  L(do_sigret)
+  
+  ld    r8,.LC__dl_hwcap@toc(r2)
+  ld    r10,(SIGCONTEXT_V_REGS_PTR)(r31)
+#ifdef SHARED  
+/* Load _rtld-global._dl_hwcap.  */
+  ld    r8,RTLD_GLOBAL_DL_HWCAP_OFFSET(r8) 
+#else  
+  ld    r8,0(r8) /* Load extern _dl_hwcap.  */
+#endif
+  andis.  r8,r8,(PPC_FEATURE_HAS_ALTIVEC >> 16)
+  beq   L(has_no_vec2)
+  
+  cmpdi r10,0
+  beq   L(has_no_vec2)
+  lwz   r0,(33*16)(r10)
+  
+  li    r9,(16*32)
+  mtspr VRSAVE,r0
+  cmpwi r0,0
+  beq   L(has_no_vec2)  
+  
+  lvx   v19,r9,r10
+  la    r9,(16)(r10)
+  
+  lvx   v0,0,r10  
+  lvx   v1,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  mtvscr  v19
+  lvx   v2,0,r10  
+  lvx   v3,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v4,0,r10  
+  lvx   v5,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v6,0,r10  
+  lvx   v7,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v8,0,r10  
+  lvx   v9,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v10,0,r10  
+  lvx   v11,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v12,0,r10  
+  lvx   v13,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v14,0,r10  
+  lvx   v15,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v16,0,r10  
+  lvx   v17,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v18,0,r10  
+  lvx   v11,0,r9
+  addi  r19,r10,32
+  addi  r9,r9,32
+  
+  lvx   v20,0,r10  
+  lvx   v21,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v22,0,r10  
+  lvx   v23,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v24,0,r10  
+  lvx   v25,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v26,0,r10  
+  lvx   v27,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v28,0,r10  
+  lvx   v29,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v30,0,r10  
+  lvx   v31,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+  lvx   v10,0,r10  
+  lvx   v11,0,r9
+  addi  r10,r10,32
+  addi  r9,r9,32
+  
+L(has_no_vec2):
 
   lfd  fp0,(SIGCONTEXT_FP_REGS+(32*8))(r31)
   lfd  fp31,(SIGCONTEXT_FP_REGS+(PT_R31*8))(r31)	
@@ -271,4 +757,4 @@ L(do_sigret):
 
 PSEUDO_END(__swapcontext)
 
-weak_alias(__swapcontext, swapcontext)
+versioned_symbol (libc, __swapcontext, swapcontext, GLIBC_2_3_4)
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/ucontext_i.h b/sysdeps/unix/sysv/linux/powerpc/powerpc64/ucontext_i.h
index c24a8d5963..45f1bfdae9 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/ucontext_i.h
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/ucontext_i.h
@@ -56,3 +56,5 @@
 #define SIGCONTEXT_PT_REGS 224
 #define SIGCONTEXT_GP_REGS 232
 #define SIGCONTEXT_FP_REGS 616
+#define SIGCONTEXT_V_REGS_PTR 880
+#define SIGCONTEXT_V_RESERVE 888
diff --git a/sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h b/sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h
index b75e25a3c8..a499a80ef9 100644
--- a/sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h
+++ b/sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1998, 1999, 2002 Free Software Foundation, Inc.
+/* Copyright (C) 1998, 1999, 2002, 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
@@ -29,7 +29,7 @@
 #if __WORDSIZE == 32
 
 /* Number of general registers.  */
-#define NGREG	48
+# define NGREG	48
 
 /* Container for all general registers.  */
 typedef unsigned long gregset_t[NGREG];
@@ -62,8 +62,74 @@ typedef struct
 
 #else
 
-/* For 64-bit, a machine context is exactly a sigcontext.  */
-typedef struct sigcontext mcontext_t;
+/* For 64-bit kernels with Altivec support, a machine context is exactly 
+ * a sigcontext.  For older kernel (without Altivec) the sigcontext matches 
+ * the mcontext upto but not including the v_regs field.  For kernels that 
+ * don't AT_HWCAP or return AT_HWCAP without PPC_FEATURE_HAS_ALTIVEC the 
+ * v_regs field may not exit and should not be referenced.  The v_regd field
+ * can be refernced safely only after verifying that PPC_FEATURE_HAS_ALTIVEC
+ * is set in AT_HWCAP.  */
+    
+# include <asm/types.h>
+
+/* Number of general registers.  */
+# define NGREG	48	/* includes r0-r31, nip, msr, lr, etc.   */
+# define NFPREG	33	/* includes fp0-fp31 &fpscr.  */
+# define NVRREG	34	/* includes v0-v31, vscr, & vrsave in split vectors */
+
+typedef unsigned long gregset_t[NGREG];
+typedef double fpregset_t[NFPREG];
+
+/* Container for Altivec/VMX Vector Status and Control Register.  Only 32-bits
+   but can only be copied to/from a 128-bit vector register.  So we allocated 
+   a whole quadword speedup save/restore.  */
+typedef struct _libc_vscr
+{
+	unsigned int __pad[3];
+	unsigned int vscr_word;
+} vscr_t;
+
+/* Container for Altivec/VMX registers and status.
+   Must to be aligned on a 16-byte boundary. */
+typedef struct _libc_vrstate
+{
+	unsigned int	vrregs[32][4];
+	vscr_t		vscr;
+	unsigned int	vrsave;
+	unsigned int	__pad[3];
+} vrregset_t  __attribute__((__aligned__(16)));
+
+typedef struct {
+	unsigned long	__unused[4];
+	int		signal;
+	int		__pad0;
+	unsigned long	handler;
+	unsigned long	oldmask;
+	struct pt_regs	*regs;
+	gregset_t	gp_regs;
+	fpregset_t	fp_regs;
+/*
+ * To maintain compatibility with current implementations the sigcontext is 
+ * extended by appending a pointer (v_regs) to a quadword type (elf_vrreg_t) 
+ * followed by an unstructured (vmx_reserve) field of 69 doublewords.  This 
+ * allows the array of vector registers to be quadword aligned independent of 
+ * the alignment of the containing sigcontext or ucontext. It is the 
+ * responsibility of the code setting the sigcontext to set this pointer to 
+ * either NULL (if this processor does not support the VMX feature) or the 
+ * address of the first quadword within the allocated (vmx_reserve) area.
+ *
+ * The pointer (v_regs) of vector type (elf_vrreg_t) is essentually  
+ * an array of 34 quadword entries.  The entries with 
+ * indexes 0-31 contain the corresponding vector registers.  The entry with 
+ * index 32 contains the vscr as the last word (offset 12) within the 
+ * quadword.  This allows the vscr to be stored as either a quadword (since 
+ * it must be copied via a vector register to/from storage) or as a word.  
+ * The entry with index 33 contains the vrsave as the first word (offset 0) 
+ * within the quadword.
+ */
+	vrregset_t	*v_regs;
+	long		vmx_reserve[NVRREG+NVRREG+1];
+} mcontext_t;
 
 #endif
 
-- 
cgit 1.4.1