/* Frame unwinder for frames with DWARF Call Frame Information.
- Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2003-2017 Free Software Foundation, Inc.
Contributed by Mark Kettenis.
This program 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 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef DWARF2_FRAME_H
#define DWARF2_FRAME_H 1
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 (*signal_frame_p) (struct gdbarch *,
struct frame_info *));
-/* Set the architecture-specific mapping of .eh_frame register numbers to
- DWARF register numbers. */
+/* Set the architecture-specific adjustment of .eh_frame and .debug_frame
+ register numbers. */
extern void
- dwarf2_frame_set_eh_frame_regnum (struct gdbarch *gdbarch,
- int (*eh_frame_regnum) (struct gdbarch *,
- int));
+ dwarf2_frame_set_adjust_regnum (struct gdbarch *gdbarch,
+ int (*adjust_regnum) (struct gdbarch *,
+ int, int));
-/* Translate a .eh_frame register to DWARF register. */
+/* Append the DWARF-2 frame unwinders to GDBARCH's list. */
-extern int
- dwarf2_frame_eh_frame_regnum (struct gdbarch *gdbarch, int regnum);
-
-/* Return the frame unwind methods for the function that contains PC,
- or NULL if it can't be handled by DWARF CFI frame unwinder. */
-
-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);
+
+/* Compute the DWARF CFA for a frame. */
+
+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.
-/* Register the DWARF CFI for OBJFILE. */
+ TEXT_OFFSET_OUT, CFA_START_OUT, and CFA_END_OUT describe the CFA
+ in other cases. These are only used when 0 is returned. */
-void dwarf2_frame_build_info (struct objfile *objfile);
+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 */