unwinder: s390 and s390x

Signed-off-by: Jan Kratochvil <[email protected]>

1 files changed, 17 insertions, 0 deletions

diff --git a/libebl/ebl-hooks.h b/libebl/ebl-hooks.h
index f721bc49..22438953 100644
--- a/libebl/ebl-hooks.h
+++ b/libebl/ebl-hooks.h
@@ -166,5 +166,22 @@ bool EBLHOOK(set_initial_registers_tid) (pid_t tid,
    Dwarf_Frame->REGS indexing.  */
 bool EBLHOOK(dwarf_to_regno) (Ebl *ebl, unsigned *regno);
 
+/* Optionally modify *PC as fetched from inferior data into valid PC
+   instruction pointer.  */
+void EBLHOOK(normalize_pc) (Ebl *ebl, Dwarf_Addr *pc);
+
+/* Get previous frame state for an existing frame state.  Method is called only
+   if unwinder could not find CFI for current PC.  PC is for the
+   existing frame.  SETFUNC sets register in the previous frame.  GETFUNC gets
+   register from the existing frame.  Note that GETFUNC vs. SETFUNC act on
+   a disjunct set of registers.  READFUNC reads memory.  ARG has to be passed
+   for SETFUNC, GETFUNC and READFUNC.  *SIGNAL_FRAMEP is initialized to false,
+   it can be set to true if existing frame is a signal frame.  SIGNAL_FRAMEP is
+   never NULL.  */
+bool EBLHOOK(unwind) (Ebl *ebl, Dwarf_Addr pc, ebl_tid_registers_t *setfunc,
+		      ebl_tid_registers_get_t *getfunc,
+		      ebl_pid_memory_read_t *readfunc, void *arg,
+		      bool *signal_framep);
+
 /* Destructor for ELF backend handle.  */
 void EBLHOOK(destr) (struct ebl *);