[PATCH]: Add proper backtrace functions for sparc.
David Miller
davem@davemloft.net
Mon May 19 20:08:00 GMT 2008
From: David Miller <davem@davemloft.net>
Date: Fri, 09 May 2008 05:23:45 -0700 (PDT)
Ping?
> This allows the fortify testcases under debug/ to pass on sparc.
>
> After all of the patches I've posted recently are applied, the only
> testcase failure left for sparcv9*-linux and sparc64*-linux is nptl's
> tst-cancelx21 on 64-bit. That's probably just another missing
> -fexceptions for some part of the build and I'll try to track that
> down tomorrow.
>
> Plain sparc-linux has a few other failures, but I think those are due
> to some futex issues when true atomics are not available as the
> testcases that fail simply hang in some futex call.
>
> Please apply, thanks!
>
> 2008-05-09 David S. Miller <davem@davemloft.net>
>
> * sysdeps/sparc/sparc32/backtrace.c: New file.
> * sysdeps/sparc/sparc64/backtrace.c: New file.
> ---
> sysdeps/sparc/sparc32/backtrace.c | 55 +++++++++++++++++++++++++++++++++++
> sysdeps/sparc/sparc64/backtrace.c | 58 +++++++++++++++++++++++++++++++++++++
> 2 files changed, 113 insertions(+), 0 deletions(-)
> create mode 100644 sysdeps/sparc/sparc32/backtrace.c
> create mode 100644 sysdeps/sparc/sparc64/backtrace.c
>
> diff --git a/sysdeps/sparc/sparc32/backtrace.c b/sysdeps/sparc/sparc32/backtrace.c
> new file mode 100644
> index 0000000..e2357eb
> --- /dev/null
> +++ b/sysdeps/sparc/sparc32/backtrace.c
> @@ -0,0 +1,55 @@
> +/* Return backtrace of current program state.
> + Copyright (C) 2008 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> + Contributed by David S. Miller <davem@davemloft.net>
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Library General Public License as
> + published by the Free Software Foundation; either version 2 of the
> + License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Library General Public License for more details.
> +
> + You should have received a copy of the GNU Library General Public
> + License along with the GNU C Library; see the file COPYING.LIB. If not,
> + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
> + Boston, MA 02111-1307, USA. */
> +
> +#include <execinfo.h>
> +#include <stddef.h>
> +#include <bp-checks.h>
> +#include <sys/trap.h>
> +
> +struct layout
> +{
> + unsigned long locals[8];
> + unsigned long ins[6];
> + struct layout *__unbounded next;
> + void *__unbounded return_address;
> +};
> +
> +int
> +__backtrace (void **array, int size)
> +{
> + struct layout *current;
> + int count;
> +
> + asm volatile ("ta %0" : : "i" (ST_FLUSH_WINDOWS));
> + asm volatile ("mov %%fp, %0" : "=r"(current));
> + current = BOUNDED_1 (current);
> +
> + for (count = 0; count < size; count++)
> + {
> + array[count] = current->return_address;
> + current = BOUNDED_1 (current->next);
> + if (!current)
> + break;
> + }
> +
> + return count;
> +}
> +weak_alias (__backtrace, backtrace)
> +libc_hidden_def (__backtrace)
> diff --git a/sysdeps/sparc/sparc64/backtrace.c b/sysdeps/sparc/sparc64/backtrace.c
> new file mode 100644
> index 0000000..6d7e429
> --- /dev/null
> +++ b/sysdeps/sparc/sparc64/backtrace.c
> @@ -0,0 +1,58 @@
> +/* Return backtrace of current program state.
> + Copyright (C) 2008 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> + Contributed by David S. Miller <davem@davemloft.net>
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Library General Public License as
> + published by the Free Software Foundation; either version 2 of the
> + License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Library General Public License for more details.
> +
> + You should have received a copy of the GNU Library General Public
> + License along with the GNU C Library; see the file COPYING.LIB. If not,
> + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
> + Boston, MA 02111-1307, USA. */
> +
> +#include <execinfo.h>
> +#include <stddef.h>
> +#include <bp-checks.h>
> +#include <sysdep.h>
> +
> +struct layout
> +{
> + unsigned long locals[8];
> + unsigned long ins[6];
> + unsigned long next;
> + void *__unbounded return_address;
> +};
> +
> +int
> +__backtrace (void **array, int size)
> +{
> + struct layout *current;
> + unsigned long fp;
> + int count;
> +
> + asm volatile ("flushw");
> + asm volatile ("mov %%fp, %0" : "=r"(fp));
> + current = (struct layout *__unbounded) (fp + STACK_BIAS);
> + current = BOUNDED_1 (current);
> +
> + for (count = 0; count < size; count++)
> + {
> + array[count] = current->return_address;
> + if (!current->next)
> + break;
> + current = (struct layout *__unbounded) (current->next + STACK_BIAS);
> + current = BOUNDED_1 (current);
> + }
> +
> + return count;
> +}
> +weak_alias (__backtrace, backtrace)
> +libc_hidden_def (__backtrace)
> --
> 1.5.5.1.57.g5909c
>
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