diff options
| -rw-r--r-- | lib/libc_r/uthread/uthread_stack.c | 10 | ||||
| -rw-r--r-- | lib/libpthread/uthread/uthread_stack.c | 10 |
2 files changed, 14 insertions, 6 deletions
diff --git a/lib/libc_r/uthread/uthread_stack.c b/lib/libc_r/uthread/uthread_stack.c index 62474173495..8933d389701 100644 --- a/lib/libc_r/uthread/uthread_stack.c +++ b/lib/libc_r/uthread/uthread_stack.c @@ -1,4 +1,4 @@ -/* $OpenBSD: uthread_stack.c,v 1.5 2000/02/10 11:47:15 d Exp $ */ +/* $OpenBSD: uthread_stack.c,v 1.6 2000/02/26 13:34:51 d Exp $ */ /* * Copyright 1999, David Leonard. All rights reserved. * <insert BSD-style license&disclaimer> @@ -68,8 +68,12 @@ _thread_stack_alloc(base, size) return NULL; } - /* The red zone is the first physical page of the storage: */ - stack->redzone = (void*)(((int)stack->storage + nbpg - 1) & + /* + * The red zone is the first physical page of the storage. + * I'm using _BSD_PTRDIFF_T_ to convert the storage base pointer + * into an integer so that I can do page alignment on it. + */ + stack->redzone = (void*)(((_BSD_PTRDIFF_T_)stack->storage + nbpg - 1) & ~(nbpg - 1)); if (mprotect(stack->redzone, nbpg, 0) == -1) PANIC("Cannot protect stack red zone"); diff --git a/lib/libpthread/uthread/uthread_stack.c b/lib/libpthread/uthread/uthread_stack.c index 62474173495..8933d389701 100644 --- a/lib/libpthread/uthread/uthread_stack.c +++ b/lib/libpthread/uthread/uthread_stack.c @@ -1,4 +1,4 @@ -/* $OpenBSD: uthread_stack.c,v 1.5 2000/02/10 11:47:15 d Exp $ */ +/* $OpenBSD: uthread_stack.c,v 1.6 2000/02/26 13:34:51 d Exp $ */ /* * Copyright 1999, David Leonard. All rights reserved. * <insert BSD-style license&disclaimer> @@ -68,8 +68,12 @@ _thread_stack_alloc(base, size) return NULL; } - /* The red zone is the first physical page of the storage: */ - stack->redzone = (void*)(((int)stack->storage + nbpg - 1) & + /* + * The red zone is the first physical page of the storage. + * I'm using _BSD_PTRDIFF_T_ to convert the storage base pointer + * into an integer so that I can do page alignment on it. + */ + stack->redzone = (void*)(((_BSD_PTRDIFF_T_)stack->storage + nbpg - 1) & ~(nbpg - 1)); if (mprotect(stack->redzone, nbpg, 0) == -1) PANIC("Cannot protect stack red zone"); |