AArch64: Revert setting of elf class in linker stub.

[deliverable/binutils-gdb.git] / gdb / tramp-frame.h

diff --git a/gdb/tramp-frame.h b/gdb/tramp-frame.h
index 54f29bbca54ab8e27cf5e7e303111f42f4421844..f40e47bf62fc3eff73f9fd613187fcf8a897b47d 100644 (file)
--- a/gdb/tramp-frame.h
+++ b/gdb/tramp-frame.h
@@ -1,12 +1,12 @@
-/* Signal trampoline unwinder, for GDB the GNU Debugger.
+/* Signal trampoline unwinder.
 
-   Copyright 2004 Free Software Foundation, Inc.
+   Copyright (C) 2004-2020 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
    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,
@@ -15,13 +15,13 @@
    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., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #ifndef TRAMP_FRAME_H
 #define TRAMP_FRAME_H
 
+#include "frame.h"             /* For "enum frame_type".  */
+
 struct trad_frame;
 struct frame_info;
 struct trad_frame_cache;
@@ -34,36 +34,51 @@ struct trad_frame_cache;
    The only way to identify a trampoline is to perform a brute force
    examination of the instructions at and around the PC.
 
-   This module provides a convent interface for performing that
+   This module provides a convenient interface for performing that
    operation.  */
 
 /* A trampoline descriptor.  */
 
 /* Magic instruction that to mark the end of the signal trampoline
    instruction sequence.  */
-#define TRAMP_SENTINEL_INSN ((LONGEST) -1)
+#define TRAMP_SENTINEL_INSN ULONGEST_MAX
 
 struct tramp_frame
 {
-  /* The trampoline's entire instruction sequence.  Search for this in
-     the inferior at or around the frame's PC.  It is assumed that the
-     PC is INSN_SIZE aligned, and that each element of TRAMP contains
-     one INSN_SIZE instruction.  It is also assumed that TRAMP[0]
-     contains the first instruction of the trampoline and hence the
-     address of the instruction matching TRAMP[0] is the trampoline's
-     "func" address.  The instruction sequence shall be terminated by
+  /* The trampoline's type, some a signal trampolines, some are normal
+     call-frame trampolines (aka thunks).  */
+  enum frame_type frame_type;
+  /* The trampoline's entire instruction sequence.  It consists of a
+     bytes/mask pair.  Search for this in the inferior at or around
+     the frame's PC.  It is assumed that the PC is INSN_SIZE aligned,
+     and that each element of TRAMP contains one INSN_SIZE
+     instruction.  It is also assumed that INSN[0] contains the first
+     instruction of the trampoline and hence the address of the
+     instruction matching INSN[0] is the trampoline's "func" address.
+     The instruction sequence is terminated by
      TRAMP_SENTINEL_INSN.  */
   int insn_size;
-  ULONGEST insn[8];
+  struct
+  {
+    ULONGEST bytes;
+    ULONGEST mask;
+  } insn[48];
   /* Initialize a trad-frame cache corresponding to the tramp-frame.
      FUNC is the address of the instruction TRAMP[0] in memory.  */
   void (*init) (const struct tramp_frame *self,
-               struct frame_info *next_frame,
+               struct frame_info *this_frame,
                struct trad_frame_cache *this_cache,
                CORE_ADDR func);
+  /* Return non-zero if the tramp-frame is valid for the PC requested.
+     Adjust the PC to point to the address to check the instruction
+     sequence against if required.  If this is NULL, then the tramp-frame
+     is valid for any PC.  */
+  int (*validate) (const struct tramp_frame *self,
+                  struct frame_info *this_frame,
+                  CORE_ADDR *pc);
 };
 
-void tramp_frame_append (struct gdbarch *gdbarch,
-                        const struct tramp_frame *tramp);
+void tramp_frame_prepend_unwinder (struct gdbarch *gdbarch,
+                                  const struct tramp_frame *tramp);
 
 #endif