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authorDaniel Walter <dwalter@google.com>2014-08-20 10:56:00 +0100
committerRichard Weinberger <richard@nod.at>2014-10-13 21:46:25 +0200
commit970e51feaddbc33ed0e7d187af7f69d1a12c7b6a (patch)
treedbe47fda5a1271dc5404c9c96d7965a870320fc2 /arch/um/include/asm
parent2a2361228c5e6d8c1733f00653481de918598e50 (diff)
downloadblackbird-op-linux-970e51feaddbc33ed0e7d187af7f69d1a12c7b6a.tar.gz
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um: Add support for CONFIG_STACKTRACE
Add stacktrace support for User Mode Linux Signed-off-by: Daniel Walter <dwalter@google.com> Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/um/include/asm')
-rw-r--r--arch/um/include/asm/stacktrace.h42
1 files changed, 42 insertions, 0 deletions
diff --git a/arch/um/include/asm/stacktrace.h b/arch/um/include/asm/stacktrace.h
new file mode 100644
index 000000000000..9a864328c67f
--- /dev/null
+++ b/arch/um/include/asm/stacktrace.h
@@ -0,0 +1,42 @@
+#ifndef _ASM_UML_STACKTRACE_H
+#define _ASM_UML_STACKTRACE_H
+
+#include <linux/uaccess.h>
+#include <linux/ptrace.h>
+
+struct stack_frame {
+ struct stack_frame *next_frame;
+ unsigned long return_address;
+};
+
+struct stacktrace_ops {
+ void (*address)(void *data, unsigned long address, int reliable);
+};
+
+#ifdef CONFIG_FRAME_POINTER
+static inline unsigned long
+get_frame_pointer(struct task_struct *task, struct pt_regs *segv_regs)
+{
+ if (!task || task == current)
+ return segv_regs ? PT_REGS_BP(segv_regs) : current_bp();
+ return KSTK_EBP(task);
+}
+#else
+static inline unsigned long
+get_frame_pointer(struct task_struct *task, struct pt_regs *segv_regs)
+{
+ return 0;
+}
+#endif
+
+static inline unsigned long
+*get_stack_pointer(struct task_struct *task, struct pt_regs *segv_regs)
+{
+ if (!task || task == current)
+ return segv_regs ? (unsigned long *)PT_REGS_SP(segv_regs) : current_sp();
+ return (unsigned long *)KSTK_ESP(task);
+}
+
+void dump_trace(struct task_struct *tsk, const struct stacktrace_ops *ops, void *data);
+
+#endif /* _ASM_UML_STACKTRACE_H */
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