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[PATCH] PPC64 Add ucontext.h & get/setcontext functions


PPC32 does not support getcontext/makecontext/setcontext/swapcontext and
the ./sysdeps/generic/sys/ucontext is not easy to extend because
uc_mcontext is not the last field in the structure. For PPC64 we want to
support the context functions and include the FPU registers in
sigcontext. Plus we want to prepare for extentions to the
sigcontext/ucontext for new hardware features. The attached patch
defines a common ucontext.h for PPC32/PPC64 and implements the context
functions for PPC64.


2002-11-20  Steven Munroe  <sjmunroe@us.ibm.com>

        * sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S: New
file.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S: New file.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S: New file.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S: New file.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/ucontext_i.h: New file.
	* sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h: New file.

-- 
Steven Munroe
sjmunroe@us.ibm.com
Linux on PowerPC-64 Development
GLIBC for PowerPC-64 Development
diff -rupPN -x *.orig libc23-cvstip-20021119/sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S libc23/sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S
--- libc23-cvstip-20021119/sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S	Wed Dec 31 18:00:00 1969
+++ libc23/sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S	Tue Nov 19 13:37:26 2002
@@ -0,0 +1,138 @@
+/* Save current context.
+   Copyright (C) 2002 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.  */
+
+#include <sysdep.h>
+
+#define __ASSEMBLY__
+#include <asm/ptrace.h>
+#include "ucontext_i.h"
+
+ENTRY(__getcontext)
+  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)
+
+	addi  r5,r3,UCONTEXT_SIGMASK
+	li  r4,0
+	li  r3,SIG_BLOCK
+	bl  .sigprocmask
+	nop
+  
+  ld    r0,128+FRAME_LR_SAVE(r1)  
+  addi  r1,r1,128
+  mtlr  r0
+  blr
+PSEUDO_END(__getcontext)
+
+weak_alias(__getcontext, getcontext)
diff -rupPN -x *.orig libc23-cvstip-20021119/sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S libc23/sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S
--- libc23-cvstip-20021119/sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S	Wed Dec 31 18:00:00 1969
+++ libc23/sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S	Tue Nov 19 13:37:26 2002
@@ -0,0 +1,162 @@
+/* Create new context.
+   Copyright (C) 2002 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.  */
+
+#include <sysdep.h>
+
+#define __ASSEMBLY__
+#include <asm/ptrace.h>
+#include "ucontext_i.h"
+
+ENTRY(__makecontext)
+  /* Save parameters into the parameter save area of callers frame.  */
+  std  r3,FRAME_PARM1_SAVE(r1) /* ucontext_t *ucp  */
+  std  r4,FRAME_PARM2_SAVE(r1) /* void (*func)(void)  */
+  std  r5,FRAME_PARM3_SAVE(r1) /* int argc  */
+  std  r6,FRAME_PARM4_SAVE(r1) /* ... */
+  std  r7,FRAME_PARM5_SAVE(r1)
+  std  r8,FRAME_PARM6_SAVE(r1)
+  std  r9,FRAME_PARM7_SAVE(r1)
+  std  r10,FRAME_PARM8_SAVE(r1)
+  mflr  r0
+  /* Get the address of the target functions first parameter.  */
+  addi  r6,r1,FRAME_PARM4_SAVE
+  std   r0,FRAME_LR_SAVE(r1)
+  stdu  r1,-128(r1)
+  
+  /* Get the ucontexts stack pointer and size.  Compute the top of stack
+     and round down to a quadword boundary.  Then stack a dummy frame 
+     with a null back chain.  We store the context pointer in the frames
+     "compiler double word" field so we can recover if is the function 
+     returns.  Finally save the callers link register and TOC pointer 
+     into this frame so the debugger can display a backtrace.
+  */
+  ld    r7,UCONTEXT_STACK_SP(r3)
+  ld    r0,UCONTEXT_STACK_SIZE(r3)
+  add   r7,r7,r0
+  clrrdi  r7,r7,4
+  li    r0,0
+  stdu  r0,-48(r7)
+  std   r3,24(r7)
+  mflr  r0
+  std   r2,FRAME_TOC_SAVE(r7)  /* Store the TOC pointer for later.  */
+  std   r0,FRAME_LR_SAVE(r7)
+  
+  /* Now we need to stack another frame to hold the parameter save area
+     for the function.  We need to allocate a frame with the minimum 48 
+     byte header and 8 parameter register.  However if there are more 
+     than 8 parameters addition space is need to hold all the parameters.
+     The total size it rounded up to a quadword multiple then a frame is 
+     stacked.  This address is stored in the ucontext as GPR 1.  */
+     
+  cmpdi cr1,r5,8  
+  sldi  r8,r5,3
+  bgt   cr1,L(gt8)
+  li    r8,64
+L(gt8):
+  addi  r8,r8,FRAME_PARM_SAVE+8 /* Add header plus rounding factor.  */
+  clrrdi  r8,r8,4  /* Round down to quadword.  */
+  
+  subf  r8,r8,r7
+  std   r7,0(r8)   /* Stack the frame.  */
+  std   r8,(SIGCONTEXT_GP_REGS+(PT_R1*8))(r3)
+  
+  /* Now we need to copy the target functions parameters.  The functions 
+     parameters are saved in the parameter save area.  We skip over the
+     first three parameters and copy up to 8 double word into the 
+     SIGCONTEXT_GP_REGS starting with R3.  If there are more than 8 
+     parameters then doublewords 8-N are copied into the parameter
+     save area of the context frame.  */ 
+  cmpdi r5,0
+  beq   L(noparms)
+  mr    r0,r5
+  ble   cr1,L(le8)
+  li    r0,8
+L(le8):    
+  mtctr r0
+  addi  r7,r6,-8
+  addi  r9,r3,(SIGCONTEXT_GP_REGS+(PT_R3*8)-8)
+L(parmloop2):
+  ldu   r0,8(r7)
+  stdu  r0,8(r9)
+  bdnz  L(parmloop2)
+  
+  addi  r0,r5,-8 
+  ble   cr1,L(noparms) 
+  mtctr r0
+  addi  r9,r8,FRAME_PARM9_SAVE-8
+L(parmloop):
+  ldu   r0,8(r7)
+  stdu  r0,8(r9)
+  bdnz  L(parmloop)
+  
+L(noparms):
+  
+  /* Load the function address and TOC from the function descriptor
+     and store them in the ucontext as NIP and r2.  Store the 3rd 
+     field of the function descriptor into the ucontext as r11 in case
+     the calling language needs the "environment pointer".  */
+  ld    r0,0(r4)
+  ld    r10,8(r4);
+  ld    r9,16(r4); 
+  std   r0,(SIGCONTEXT_GP_REGS+(PT_NIP*8))(r3)  
+  std   r10,(SIGCONTEXT_GP_REGS+(PT_R2*8))(r3) 
+  std   r9,(SIGCONTEXT_GP_REGS+(PT_R11*8))(r3)
+  
+  /* If the target function returns we need to do some cleanup.  We use a
+     code trick to get the address of our cleanup function into the link
+     register.  Do not add any code between here and L(exitcode).  */
+  bl  L(gotexitcodeaddr);
+
+	/* This is the helper code which gets called if a function which
+	   is registered with 'makecontext' returns.  In this case we
+	   have to install the context listed in the uc_link element of
+	   the context 'makecontext' manipulated at the time of the
+	   'makecontext' call.  If the pointer is NULL the process must
+	   terminate.  */
+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    r2,FRAME_TOC_SAVE(r1)
+  ld    r3,UCONTEXT_LINK(r3)  /* Load the resume context.  */
+  cmpdi r3,0
+  beq   L(BADSTATUS)
+	bl    JUMPTARGET(__setcontext)
+	nop
+
+L(BADSTATUS):
+/* If setcontext returns (which can happen if the syscall fails) we will
+   exit the program with error status (-1).  */
+  li    r3,-1
+  b     JUMPTARGET(exit);
+  
+  /* The address of the exit code is in the link register.  Store the lr
+     in the ucontext as LNK so the target function will return to our 
+     exit code.  */
+L(gotexitcodeaddr):
+  mflr  r0
+  std   r0,(SIGCONTEXT_GP_REGS+(PT_LNK*8))(r3)
+
+  ld    r0,128+FRAME_LR_SAVE(r1)  
+  addi  r1,r1,128
+  mtlr  r0
+  blr
+END(__makecontext)
+
+weak_alias(__makecontext, makecontext)
diff -rupPN -x *.orig libc23-cvstip-20021119/sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S libc23/sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S
--- libc23-cvstip-20021119/sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S	Wed Dec 31 18:00:00 1969
+++ libc23/sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S	Tue Nov 19 13:37:26 2002
@@ -0,0 +1,133 @@
+/* Switch to context.
+   Copyright (C) 2002 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.  */
+
+#include <sysdep.h>
+
+#define __ASSEMBLY__
+#include <asm/ptrace.h>
+#include "ucontext_i.h"
+
+ENTRY(__setcontext)
+  mflr  r0
+  std   r31,-8(1)
+  std   r0,FRAME_LR_SAVE(r1)
+  stdu  r1,-128(r1)
+  mr    r31,r3
+
+	li    r5,0
+	addi  r4,r3,UCONTEXT_SIGMASK
+	li    r3,SIG_SETMASK
+	bl    .sigprocmask
+	nop
+	cmpdi  r3,0
+	bne   L(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(error_exit):
+  ld    r0,128+FRAME_LR_SAVE(r1)  
+  addi  r1,r1,128
+  mtlr  r0
+	ld    r31,-8(r1)
+  blr
+PSEUDO_END(__setcontext)
+
+weak_alias(__setcontext, setcontext)
diff -rupPN -x *.orig libc23-cvstip-20021119/sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S libc23/sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S
--- libc23-cvstip-20021119/sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S	Wed Dec 31 18:00:00 1969
+++ libc23/sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S	Tue Nov 19 13:37:26 2002
@@ -0,0 +1,227 @@
+/* Save current context and install the given one.
+   Copyright (C) 2002 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.  */
+
+#include <sysdep.h>
+
+#define __ASSEMBLY__
+#include <asm/ptrace.h>
+#include "ucontext_i.h"
+
+ENTRY(__swapcontext)
+  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    .sigprocmask
+	nop
+	cmpdi  r3,0
+	bne   L(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(error_exit):
+  ld    r0,128+FRAME_LR_SAVE(r1)  
+  addi  r1,r1,128
+  mtlr  r0
+	ld    r31,-8(r1)
+  blr
+PSEUDO_END(__swapcontext)
+
+weak_alias(__swapcontext, swapcontext)
diff -rupPN -x *.orig libc23-cvstip-20021119/sysdeps/unix/sysv/linux/powerpc/powerpc64/ucontext_i.h libc23/sysdeps/unix/sysv/linux/powerpc/powerpc64/ucontext_i.h
--- libc23-cvstip-20021119/sysdeps/unix/sysv/linux/powerpc/powerpc64/ucontext_i.h	Wed Dec 31 18:00:00 1969
+++ libc23/sysdeps/unix/sysv/linux/powerpc/powerpc64/ucontext_i.h	Tue Nov 19 13:37:26 2002
@@ -0,0 +1,58 @@
+/* Offsets and other constants needed in the *context() function
+   implementation.
+   Copyright (C) 2002 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 SIG_BLOCK	0
+#define SIG_SETMASK	2
+
+/* Offsets of the fields in the powerpc64 ABI stack frame.  */
+
+#define FRAME_BACKCHAIN 0
+#define FRAME_CR_SAVE 8
+#define FRAME_LR_SAVE 16
+#define FRAME_COMPILER_DW 24
+#define FRAME_LINKER_DW 32
+#define FRAME_TOC_SAVE 40
+#define FRAME_PARM_SAVE 48
+#define FRAME_PARM1_SAVE 48
+#define FRAME_PARM2_SAVE 56
+#define FRAME_PARM3_SAVE 64
+#define FRAME_PARM4_SAVE 72
+#define FRAME_PARM5_SAVE 80
+#define FRAME_PARM6_SAVE 88
+#define FRAME_PARM7_SAVE 96
+#define FRAME_PARM8_SAVE 104
+#define FRAME_PARM9_SAVE 112
+
+
+/* Offsets of the fields in the ucontext_t structure.  */
+
+#define UCONTEXT_LINK 8
+#define UCONTEXT_STACK 16
+#define UCONTEXT_STACK_SP 16
+#define UCONTEXT_STACK_FLAGS 24
+#define UCONTEXT_STACK_SIZE 32
+#define UCONTEXT_SIGMASK 40
+#define UCONTEXT_MCONTEXT 168
+#define SIGCONTEXT_SIGNAL 200
+#define SIGCONTEXT_HANDLER 208
+#define SIGCONTEXT_OLDMASK 216
+#define SIGCONTEXT_PT_REGS 224
+#define SIGCONTEXT_GP_REGS 232
+#define SIGCONTEXT_FP_REGS 616
diff -rupPN -x *.orig libc23-cvstip-20021119/sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h libc23/sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h
--- libc23-cvstip-20021119/sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h	Wed Dec 31 18:00:00 1969
+++ libc23/sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h	Tue Nov 19 13:37:26 2002
@@ -0,0 +1,47 @@
+/* Copyright (C) 1998, 1999, 2002 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.  */
+
+#ifndef _SYS_UCONTEXT_H
+#define _SYS_UCONTEXT_H	1
+
+#include <features.h>
+#include <signal.h>
+
+/* We need the signal context definitions even if they are not used
+   included in <signal.h>.  */
+#include <bits/sigcontext.h>
+
+/* A machine context is exactly a sigcontext.  */
+typedef struct sigcontext mcontext_t;
+
+/* Userlevel context.  */
+typedef struct ucontext
+  {
+    unsigned long int uc_flags;
+    struct ucontext *uc_link;
+    stack_t uc_stack;
+#if __WORDSIZE == 32
+    mcontext_t uc_mcontext;
+    __sigset_t uc_sigmask;
+#else
+    sigset_t    uc_sigmask;
+    mcontext_t  uc_mcontext;  /* last for extensibility */
+#endif
+  } ucontext_t;
+
+#endif /* sys/ucontext.h */

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