/* Frame unwinder for frames with DWARF Call Frame Information.
- Copyright (C) 2003, 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
+ Copyright (C) 2003-2015 Free Software Foundation, Inc.
Contributed by Mark Kettenis.
struct gdbarch;
struct objfile;
struct frame_info;
+struct dwarf2_per_cu_data;
+struct agent_expr;
+struct axs_value;
/* Register rule. */
/* These aren't defined by the DWARF2 CFI specification, but are
used internally by GDB. */
+ DWARF2_FRAME_REG_FN, /* Call a registered function. */
DWARF2_FRAME_REG_RA, /* Return Address. */
DWARF2_FRAME_REG_RA_OFFSET, /* Return Address with offset. */
DWARF2_FRAME_REG_CFA, /* Call Frame Address. */
union {
LONGEST offset;
ULONGEST reg;
- unsigned char *exp;
+ const gdb_byte *exp;
+ struct value *(*fn) (struct frame_info *this_frame, void **this_cache,
+ int regnum);
} loc;
ULONGEST exp_len;
enum dwarf2_frame_reg_rule how;
int (*adjust_regnum) (struct gdbarch *,
int, int));
-/* Return the frame unwind methods for the function that contains PC,
- or NULL if it can't be handled by DWARF CFI frame unwinder. */
+/* Append the DWARF-2 frame unwinders to GDBARCH's list. */
-extern const struct frame_unwind *
- dwarf2_frame_sniffer (struct frame_info *next_frame);
+void dwarf2_append_unwinders (struct gdbarch *gdbarch);
/* Return the frame base methods for the function that contains PC, or
NULL if it can't be handled by the DWARF CFI frame unwinder. */
extern const struct frame_base *
- dwarf2_frame_base_sniffer (struct frame_info *next_frame);
+ dwarf2_frame_base_sniffer (struct frame_info *this_frame);
-/* Register the DWARF CFI for OBJFILE. */
+/* Compute the DWARF CFA for a frame. */
-void dwarf2_frame_build_info (struct objfile *objfile);
+CORE_ADDR dwarf2_frame_cfa (struct frame_info *this_frame);
+
+/* Find the CFA information for PC.
+
+ Return 1 if a register is used for the CFA, or 0 if another
+ expression is used. Throw an exception on error.
+
+ GDBARCH is the architecture to use.
+ DATA is the per-CU data.
+
+ REGNUM_OUT is an out parameter that is set to the register number.
+ OFFSET_OUT is the offset to use from this register.
+ These are only filled in when 1 is returned.
+
+ TEXT_OFFSET_OUT, CFA_START_OUT, and CFA_END_OUT describe the CFA
+ in other cases. These are only used when 0 is returned. */
+
+extern int dwarf2_fetch_cfa_info (struct gdbarch *gdbarch, CORE_ADDR pc,
+ struct dwarf2_per_cu_data *data,
+ int *regnum_out, LONGEST *offset_out,
+ CORE_ADDR *text_offset_out,
+ const gdb_byte **cfa_start_out,
+ const gdb_byte **cfa_end_out);
#endif /* dwarf2-frame.h */