Update.

2000-07-29  Greg McGary  <greg@mcgary.org>

	* Rules (test-bp-inputs, make-test-out): New variables.
	($(objpfx)%-bp.out): New rule.
	($(objpfx)%.out): Rewrite in terms of new variables.

	* libio/iovswscanf.c (vswscanf): Pass _IO_FILE_plus pointer to
	internal function that uses vtable.
	* libio/vsnprintf.c (_IO_vsnprintf): Likewise.
	* libio/vswprintf.c (_IO_vswprintf): Likewise.

	* malloc/malloc.c (mem2chunk): Define in terms of chunk_at_offset.
	(malloc_extend_top): Convert brk to chunk using chunk_at_offset.
	(chunk_align): Likewise.

	* time/asctime.c (ab_day_name, ab_month_name): Rewrite expression
	in a way that conforms to decl, and avoids spurious bounds violation.

	* sysdeps/arm/frame.h (struct layout): Make pointers __unbounded.
	* sysdeps/generic/frame.h: Likewise.
	* sysdeps/generic/backtrace.c (ADVANCE_STACK_FRAME): Wrap bounds
	around return value.
	(__backtrace): Qualify frame-pointer chain and return address
	pointers as __unbounded.  Wrap bounds around variable `current'.
	* sysdeps/generic/segfault.c (ADVANCE_STACK_FRAME): Wrap bounds
	around return value.
	(catch_segfault): Qualify frame-pointer chain and return address
	pointers as __unbounded.  Wrap bounds around variable `current'.
	* sysdeps/i386/backtrace.c (struct layout): Make pointers __unbounded.
	(ADVANCE_STACK_FRAME): Wrap bounds around return value.
	* sysdeps/powerpc/backtrace.c (struct layout): Make pointers __unbounded.
	(__backtrace): Qualify frame-pointer chain and return address
	pointers as __unbounded.  Wrap bounds around variable `current'.

	* sysdeps/i386/addmul_1.S: s2_limb is scalar so remove bounds check.
	* sysdeps/i386/mul_1.S: Likewise.
	* sysdeps/i386/submul_1.S: Likewise.
	* sysdeps/i386/i586/addmul_1.S: Likewise.
	* sysdeps/i386/i586/mul_1.S: Add bounds checks.
	* sysdeps/i386/i586/submul_1.S: Likewise.

1 files changed, 6 insertions, 4 deletions

diff --git a/sysdeps/powerpc/backtrace.c b/sysdeps/powerpc/backtrace.c
index a89d33294b..fdf84f8e47 100644
--- a/sysdeps/powerpc/backtrace.c
+++ b/sysdeps/powerpc/backtrace.c
@@ -1,5 +1,5 @@
 /* Return backtrace of current program state.
-   Copyright (C) 1998 Free Software Foundation, Inc.
+   Copyright (C) 1998, 2000 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
@@ -19,6 +19,7 @@
 
 #include <execinfo.h>
 #include <stddef.h>
+#include <bp-checks.h>
 
 /* This is the stack layout we see with every stack frame.
    Note that every routine is required by the ABI to lay out the stack
@@ -32,8 +33,8 @@
 */
 struct layout
 {
-  struct layout *next;
-  void *return_address;
+  struct layout *__unbounded next;
+  void *__unbounded return_address;
 };
 
 int
@@ -47,10 +48,11 @@ __backtrace (void **array, int size)
 
   /* Get the address on top-of-stack.  */
   asm volatile ("lwz %0,0(1)" : "=r"(current));
+  current = BOUNDED_1 (current);
 
   for (				count = 0;
        current != NULL && 	count < size;
-       current = current->next, count++)
+       current = BOUNDED_1 (current->next), count++)
     array[count] = current->return_address;
 
   /* It's possible the second-last stack frame can't return