1 files changed, 85 insertions, 0 deletions
diff --git a/arch/parisc/include/asm/unwind.h b/arch/parisc/include/asm/unwind.h
new file mode 100644
index 0000000000..9547e5261a
--- /dev/null
+++ b/arch/parisc/include/asm/unwind.h
@@ -0,0 +1,85 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _UNWIND_H_
+#define _UNWIND_H_
+
+#include <linux/list.h>
+
+/* Max number of levels to backtrace */
+#define MAX_UNWIND_ENTRIES	30
+
+/* From ABI specifications */
+struct unwind_table_entry {
+	unsigned int region_start;
+	unsigned int region_end;
+	unsigned int Cannot_unwind:1; /* 0 */
+	unsigned int Millicode:1;	/* 1 */
+	unsigned int Millicode_save_sr0:1;	/* 2 */
+	unsigned int Region_description:2;	/* 3..4 */
+	unsigned int reserved1:1;	/* 5 */
+	unsigned int Entry_SR:1;	/* 6 */
+	unsigned int Entry_FR:4;	/* number saved *//* 7..10 */
+	unsigned int Entry_GR:5;	/* number saved *//* 11..15 */
+	unsigned int Args_stored:1;	/* 16 */
+	unsigned int Variable_Frame:1;	/* 17 */
+	unsigned int Separate_Package_Body:1;	/* 18 */
+	unsigned int Frame_Extension_Millicode:1;	/* 19 */
+	unsigned int Stack_Overflow_Check:1;	/* 20 */
+	unsigned int Two_Instruction_SP_Increment:1;	/* 21 */
+	unsigned int Ada_Region:1;	/* 22 */
+	unsigned int cxx_info:1;	/* 23 */
+	unsigned int cxx_try_catch:1;	/* 24 */
+	unsigned int sched_entry_seq:1;	/* 25 */
+	unsigned int reserved2:1;	/* 26 */
+	unsigned int Save_SP:1;	/* 27 */
+	unsigned int Save_RP:1;	/* 28 */
+	unsigned int Save_MRP_in_frame:1;	/* 29 */
+	unsigned int extn_ptr_defined:1;	/* 30 */
+	unsigned int Cleanup_defined:1;	/* 31 */
+	
+	unsigned int MPE_XL_interrupt_marker:1;	/* 0 */
+	unsigned int HP_UX_interrupt_marker:1;	/* 1 */
+	unsigned int Large_frame:1;	/* 2 */
+	unsigned int Pseudo_SP_Set:1;	/* 3 */
+	unsigned int reserved4:1;	/* 4 */
+	unsigned int Total_frame_size:27;	/* 5..31 */
+};
+
+struct unwind_table {
+	struct list_head list;
+	const char *name;
+	unsigned long gp;
+	unsigned long base_addr;
+	unsigned long start;
+	unsigned long end;
+	const struct unwind_table_entry *table;
+	unsigned long length;
+};
+
+struct unwind_frame_info {
+	struct task_struct *t;
+	/* Eventually we would like to be able to get at any of the registers
+	   available; but for now we only try to get the sp and ip for each
+	   frame */
+	/* struct pt_regs regs; */
+	unsigned long sp, ip, rp, r31;
+	unsigned long prev_sp, prev_ip;
+};
+
+struct unwind_table *
+unwind_table_add(const char *name, unsigned long base_addr, 
+		 unsigned long gp, void *start, void *end);
+void
+unwind_table_remove(struct unwind_table *table);
+
+void unwind_frame_init(struct unwind_frame_info *info, struct task_struct *t, 
+		       struct pt_regs *regs);
+void unwind_frame_init_from_blocked_task(struct unwind_frame_info *info,
+			struct task_struct *t);
+void unwind_frame_init_task(struct unwind_frame_info *info,
+			struct task_struct *task, struct pt_regs *regs);
+int unwind_once(struct unwind_frame_info *info);
+int unwind_to_user(struct unwind_frame_info *info);
+
+int unwind_init(void);
+
+#endif