7 files changed, 81 insertions, 5 deletions
diff --git a/sysdeps/unix/sysv/linux/configure.in b/sysdeps/unix/sysv/linux/configure.in
index 7947743f1a..462965f4f6 100644
--- a/sysdeps/unix/sysv/linux/configure.in
+++ b/sysdeps/unix/sysv/linux/configure.in
@@ -80,7 +80,7 @@ case "$machine" in
     arch_minimum_kernel=2.0.10
     ;;
   powerpc/powerpc64)
-    arch_minimum_kernel=2.4.21
+    arch_minimum_kernel=2.4.19
     ;;
   s390/s390-32)
     libc_cv_gcc_unwind_find_fde=yes
diff --git a/sysdeps/unix/sysv/linux/kernel-features.h b/sysdeps/unix/sysv/linux/kernel-features.h
index 3159dd1ada..45cd3e59c8 100644
--- a/sysdeps/unix/sysv/linux/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/kernel-features.h
@@ -210,6 +210,19 @@
 # define __ASSUME_MMAP2_SYSCALL		1
 #endif
 
+/* Starting with 2.4.21 PowerPC64 implements the new prctl syscall.
+   This allows applications to get/set the Floating Point Exception Mode.  */
+#if __LINUX_KERNEL_VERSION >= (132096+21) && defined __powerpc64__
+# define __ASSUME_NEW_PRCTL_SYSCALL		1
+#endif
+
+/* Starting with 2.4.21 PowerPC64 implements the new rt_sigreturn syscall.
+   The new rt_sigreturn takes an ucontext pointer allowing rt_sigreturn
+   to be used in the set/swapcontext implementation.  */
+#if __LINUX_KERNEL_VERSION >= (132096+21) && defined __powerpc64__
+# define __ASSUME_NEW_RT_SIGRETURN_SYSCALL		1
+#endif
+
 /* On x86, the set_thread_area syscall was introduced in 2.5.29, but its
    semantics was changed in 2.5.30, and again after 2.5.31.  */
 #if __LINUX_KERNEL_VERSION >= 132384 && defined __i386__
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/fe_nomask.c b/sysdeps/unix/sysv/linux/powerpc/powerpc64/fe_nomask.c
index 16619cddd2..6a0a82c703 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/fe_nomask.c
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/fe_nomask.c
@@ -26,8 +26,11 @@
 const fenv_t *
 __fe_nomask_env (void)
 {
+#ifdef __ASSUME_NEW_PRCTL_SYSCALL
   INTERNAL_SYSCALL_DECL (err);
   INTERNAL_SYSCALL (prctl, err, 2, PR_SET_FPEXC, PR_FP_EXC_PRECISE);
-
+#else  
+  __set_errno (ENOSYS);
+#endif
   return FE_ENABLED_ENV;
 }
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S b/sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S
index 59dfb82ef5..ddbf40b8d9 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S
@@ -21,9 +21,11 @@
 
 #define __ASSEMBLY__
 #include <asm/ptrace.h>
+#include <asm/errno.h>
 #include "ucontext_i.h"
 
 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
@@ -126,8 +128,18 @@ ENTRY(__getcontext)
   addi  r5,r3,UCONTEXT_SIGMASK
   li  r4,0
   li  r3,SIG_BLOCK
-  bl  .sigprocmask
+  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
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S b/sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S
index 29dd17ffe4..08ce90177b 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S
@@ -22,8 +22,10 @@
 #define __ASSEMBLY__
 #include <asm/ptrace.h>
 #include "ucontext_i.h"
+#include <asm/errno.h>
 
 ENTRY(__makecontext)
+#ifdef __ASSUME_NEW_RT_SIGRETURN_SYSCALL
   /* 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)  */
@@ -156,6 +158,20 @@ L(gotexitcodeaddr):
   addi  r1,r1,128
   mtlr  r0
   blr
+#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
 END(__makecontext)
 
 weak_alias(__makecontext, makecontext)
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S b/sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S
index d503cbbf3e..fa37abd6da 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S
@@ -22,8 +22,10 @@
 #define __ASSEMBLY__
 #include <asm/ptrace.h>
 #include "ucontext_i.h"
+#include <asm/errno.h>
 
 ENTRY(__setcontext)
+#ifdef __ASSUME_NEW_RT_SIGRETURN_SYSCALL
   mflr  r0
   std   r31,-8(1)
   std   r0,FRAME_LR_SAVE(r1)
@@ -47,7 +49,7 @@ ENTRY(__setcontext)
   li    r5,0
   addi  r4,r3,UCONTEXT_SIGMASK
   li    r3,SIG_SETMASK
-  bl    .sigprocmask
+  bl    JUMPTARGET(sigprocmask)
   nop
   cmpdi r3,0
   bne   L(error_exit)
@@ -156,6 +158,20 @@ L(do_sigret):
   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(__setcontext)
 
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S b/sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S
index 23422fb948..b1bcd44af1 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S
@@ -22,8 +22,10 @@
 #define __ASSEMBLY__
 #include <asm/ptrace.h>
 #include "ucontext_i.h"
+#include <asm/errno.h>
 
 ENTRY(__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
@@ -128,7 +130,7 @@ ENTRY(__swapcontext)
   addi  r5,r3,UCONTEXT_SIGMASK
   addi  r4,r4,UCONTEXT_SIGMASK
   li    r3,SIG_SETMASK
-  bl    .sigprocmask
+  bl    JUMPTARGET(sigprocmask)
   nop
   cmpdi  r3,0
   bne   L(error_exit)
@@ -251,6 +253,20 @@ L(do_sigret):
   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(__swapcontext)