[PATCH]: Add proper backtrace functions for sparc.
David Miller
davem@davemloft.net
Fri May 9 12:36:00 GMT 2008
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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