From e021cda255e14eebecde2fc1c92446e25a2ee761 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Wed, 17 Jun 1998 10:24:52 +0000 Subject: [PATCH] Update. 1998-06-16 Andreas Schwab * sysdeps/generic/backtrace.c (INNER_THAN): New definition, use it to compare stack addresses. --- ChangeLog | 5 +++++ sysdeps/generic/backtrace.c | 8 +++++++- 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/ChangeLog b/ChangeLog index f627e8b..ca68a03 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,8 @@ +1998-06-16 Andreas Schwab + + * sysdeps/generic/backtrace.c (INNER_THAN): New definition, use it + to compare stack addresses. + 1998-06-17 Ulrich Drepper * sysdeps/unix/sysv/linux/alpha/glob.c: Include glob.h before diff --git a/sysdeps/generic/backtrace.c b/sysdeps/generic/backtrace.c index 7ac1d5f..2d329e1 100644 --- a/sysdeps/generic/backtrace.c +++ b/sysdeps/generic/backtrace.c @@ -44,6 +44,11 @@ extern void *__libc_stack_end; # define CURRENT_STACK_FRAME ({ char __csf; &__csf; }) #endif +/* By default we assume that the stack grows downward. */ +#ifndef INNER_THAN +# define INNER_THAN < +#endif + struct layout { struct layout *next; @@ -67,7 +72,8 @@ __backtrace (array, size) current = (struct layout *) top_frame; while (cnt < size) { - if ((void *) current < top_stack || (void *) current > __libc_stack_end) + if ((void *) current INNER_THAN top_stack + || !((void *) current INNER_THAN __libc_stack_end)) /* This means the address is out of range. Note that for the toplevel we see a frame pointer with value NULL which clearly is out of range. */ -- 2.7.4