In the lazy binding routine, make sure we actually allocate the stack we need,

instead of corrupting the caller's stack by mistake.

This fixes the mysterious segfaults in __powerpc_read_tcb() reported on
earlier G3 systems - more recent processors have been luckier...

ok deraadt@

diff --git a/libexec/ld.so/powerpc/ldasm.S b/libexec/ld.so/powerpc/ldasm.S
index 478c1d9..e8515cf 100644 (file)
--- a/libexec/ld.so/powerpc/ldasm.S
+++ b/libexec/ld.so/powerpc/ldasm.S
@@ -1,4 +1,4 @@
-/*     $OpenBSD: ldasm.S,v 1.21 2014/07/14 03:54:51 deraadt Exp $ */
+/*     $OpenBSD: ldasm.S,v 1.22 2015/06/01 19:55:20 miod Exp $ */
 
 /*
  * Copyright (c) 1999 Dale Rahn
@@ -126,7 +126,7 @@ ENTRY(_dl_start)
        bctr                    # Go execute the 'real' program.
 
 ENTRY(_dl_bind_start)
-       stwu    1,-64(1)
+       stwu    1,-72(1)
 
        stw     0,8(1)          # save r0 - cerror ;-)
        mflr    0
@@ -159,7 +159,7 @@ ENTRY(_dl_bind_start)
        mtlr    0
        lwz     0,8(1)
 
-       addi    1,1,64
+       addi    1,1,72
        bctr
 
 #define        DL_SYSCALL(n)           DL_SYSCALL2(n,n)