grub2/0068-Make-grub_fatal-also-backtrace.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Wed, 27 Jan 2016 09:22:42 -0500
Subject: [PATCH] Make grub_fatal() also backtrace.
---
grub-core/Makefile.core.def | 3 ++
grub-core/kern/misc.c | 8 +++++-
grub-core/lib/arm64/backtrace.c | 62 +++++++++++++++++++++++++++++++++++++++++
grub-core/lib/backtrace.c | 2 ++
grub-core/lib/i386/backtrace.c | 14 +++++++++-
5 files changed, 87 insertions(+), 2 deletions(-)
create mode 100644 grub-core/lib/arm64/backtrace.c
diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
index 99466b1e47e..ebc558019cd 100644
--- a/grub-core/Makefile.core.def
+++ b/grub-core/Makefile.core.def
@@ -186,6 +186,9 @@ kernel = {
softdiv = lib/division.c;
+ x86 = lib/i386/backtrace.c;
+ x86 = lib/backtrace.c;
+
i386 = kern/i386/dl.c;
i386_xen = kern/i386/dl.c;
i386_xen_pvh = kern/i386/dl.c;
diff --git a/grub-core/kern/misc.c b/grub-core/kern/misc.c
index 1c560ea570a..04371ac49f2 100644
--- a/grub-core/kern/misc.c
+++ b/grub-core/kern/misc.c
@@ -24,6 +24,7 @@
#include <grub/term.h>
#include <grub/env.h>
#include <grub/i18n.h>
+#include <grub/backtrace.h>
union printf_arg
{
@@ -1101,8 +1102,13 @@ grub_xasprintf (const char *fmt, ...)
static void __attribute__ ((noreturn))
grub_abort (void)
{
+#ifndef GRUB_UTIL
+#if defined(__i386__) || defined(__x86_64__)
+ grub_backtrace();
+#endif
+#endif
grub_printf ("\nAborted.");
-
+
#ifndef GRUB_UTIL
if (grub_term_inputs)
#endif
diff --git a/grub-core/lib/arm64/backtrace.c b/grub-core/lib/arm64/backtrace.c
new file mode 100644
index 00000000000..1079b5380e1
--- /dev/null
+++ b/grub-core/lib/arm64/backtrace.c
@@ -0,0 +1,62 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2009 Free Software Foundation, Inc.
+ *
+ * GRUB is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GRUB 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/misc.h>
+#include <grub/command.h>
+#include <grub/err.h>
+#include <grub/dl.h>
+#include <grub/mm.h>
+#include <grub/term.h>
+#include <grub/backtrace.h>
+
+#define MAX_STACK_FRAME 102400
+
+void
+grub_backtrace_pointer (int frame)
+{
+ while (1)
+ {
+ void *lp = __builtin_return_address (frame);
+ if (!lp)
+ break;
+
+ lp = __builtin_extract_return_addr (lp);
+
+ grub_printf ("%p: ", lp);
+ grub_backtrace_print_address (lp);
+ grub_printf (" (");
+ for (i = 0; i < 2; i++)
+ grub_printf ("%p,", ((void **)ptr) [i + 2]);
+ grub_printf ("%p)\n", ((void **)ptr) [i + 2]);
+ nptr = *(void **)ptr;
+ if (nptr < ptr || (void **) nptr - (void **) ptr > MAX_STACK_FRAME
+ || nptr == ptr)
+ {
+ grub_printf ("Invalid stack frame at %p (%p)\n", ptr, nptr);
+ break;
+ }
+ ptr = nptr;
+ }
+}
+
+void
+grub_backtrace (void)
+{
+ grub_backtrace_pointer (1);
+}
+
diff --git a/grub-core/lib/backtrace.c b/grub-core/lib/backtrace.c
index 825a8800e25..c0ad6ab8be1 100644
--- a/grub-core/lib/backtrace.c
+++ b/grub-core/lib/backtrace.c
@@ -29,6 +29,7 @@ GRUB_MOD_LICENSE ("GPLv3+");
void
grub_backtrace_print_address (void *addr)
{
+#ifndef GRUB_UTIL
grub_dl_t mod;
FOR_DL_MODULES (mod)
@@ -44,6 +45,7 @@ grub_backtrace_print_address (void *addr)
}
}
+#endif
grub_printf ("%p", addr);
}
diff --git a/grub-core/lib/i386/backtrace.c b/grub-core/lib/i386/backtrace.c
index c3e03c7275c..c67273db3ae 100644
--- a/grub-core/lib/i386/backtrace.c
+++ b/grub-core/lib/i386/backtrace.c
@@ -15,11 +15,23 @@
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
+#include <config.h>
+#ifdef GRUB_UTIL
+#define REALLY_GRUB_UTIL GRUB_UTIL
+#undef GRUB_UTIL
+#endif
+
+#include <grub/symbol.h>
+#include <grub/dl.h>
+
+#ifdef REALLY_GRUB_UTIL
+#define GRUB_UTIL REALLY_GRUB_UTIL
+#undef REALLY_GRUB_UTIL
+#endif
#include <grub/misc.h>
#include <grub/command.h>
#include <grub/err.h>
-#include <grub/dl.h>
#include <grub/mm.h>
#include <grub/term.h>
#include <grub/backtrace.h>