gdb: add target_ops::supports_displaced_step

[deliverable/binutils-gdb.git] / gdb / user-regs.c

diff --git a/gdb/user-regs.c b/gdb/user-regs.c
index f4ec54a363712b799f1be701533219ed6a40acf8..cb922313b0c855b616ba8228022f3245882f4548 100644 (file)
--- a/gdb/user-regs.c
+++ b/gdb/user-regs.c
@@ -1,6 +1,6 @@
 /* User visible, per-frame registers, for GDB, the GNU debugger.
 
-   Copyright (C) 2002-2014 Free Software Foundation, Inc.
+   Copyright (C) 2002-2020 Free Software Foundation, Inc.
 
    Contributed by Red Hat.
 
@@ -22,8 +22,10 @@
 #include "defs.h"
 #include "user-regs.h"
 #include "gdbtypes.h"
-#include <string.h>
 #include "frame.h"
+#include "arch-utils.h"
+#include "command.h"
+#include "cli/cli-cmds.h"
 
 /* A table of user registers.
 
@@ -39,7 +41,10 @@
 struct user_reg
 {
   const char *name;
-  struct value *(*read) (struct frame_info * frame, const void *baton);
+  /* Avoid the "read" symbol name as it conflicts with a preprocessor symbol
+     in the NetBSD header for Stack Smashing Protection, that wraps the read(2)
+     syscall.  */
+  struct value *(*xread) (struct frame_info * frame, const void *baton);
   const void *baton;
   struct user_reg *next;
 };
@@ -58,7 +63,7 @@ struct gdb_user_regs
 
 static void
 append_user_reg (struct gdb_user_regs *regs, const char *name,
-                user_reg_read_ftype *read, const void *baton,
+                user_reg_read_ftype *xread, const void *baton,
                 struct user_reg *reg)
 {
   /* The caller is responsible for allocating memory needed to store
@@ -66,7 +71,7 @@ append_user_reg (struct gdb_user_regs *regs, const char *name,
      register list stored in the common heap or a specific obstack.  */
   gdb_assert (reg != NULL);
   reg->name = name;
-  reg->read = read;
+  reg->xread = xread;
   reg->baton = baton;
   reg->next = NULL;
   (*regs->last) = reg;
@@ -80,10 +85,10 @@ static struct gdb_user_regs builtin_user_regs = {
 };
 
 void
-user_reg_add_builtin (const char *name, user_reg_read_ftype *read,
+user_reg_add_builtin (const char *name, user_reg_read_ftype *xread,
                      const void *baton)
 {
-  append_user_reg (&builtin_user_regs, name, read, baton,
+  append_user_reg (&builtin_user_regs, name, xread, baton,
                   XNEW (struct user_reg));
 }
 
@@ -101,25 +106,26 @@ user_regs_init (struct gdbarch *gdbarch)
 
   regs->last = &regs->first;
   for (reg = builtin_user_regs.first; reg != NULL; reg = reg->next)
-    append_user_reg (regs, reg->name, reg->read, reg->baton,
+    append_user_reg (regs, reg->name, reg->xread, reg->baton,
                     GDBARCH_OBSTACK_ZALLOC (gdbarch, struct user_reg));
   return regs;
 }
 
 void
 user_reg_add (struct gdbarch *gdbarch, const char *name,
-             user_reg_read_ftype *read, const void *baton)
+             user_reg_read_ftype *xread, const void *baton)
 {
-  struct gdb_user_regs *regs = gdbarch_data (gdbarch, user_regs_data);
+  struct gdb_user_regs *regs
+    = (struct gdb_user_regs *) gdbarch_data (gdbarch, user_regs_data);
 
   if (regs == NULL)
     {
       /* ULGH, called during architecture initialization.  Patch
          things up.  */
-      regs = user_regs_init (gdbarch);
+      regs = (struct gdb_user_regs *) user_regs_init (gdbarch);
       deprecated_set_gdbarch_data (gdbarch, user_regs_data, regs);
     }
-  append_user_reg (regs, name, read, baton,
+  append_user_reg (regs, name, xread, baton,
                   GDBARCH_OBSTACK_ZALLOC (gdbarch, struct user_reg));
 }
 
@@ -135,8 +141,7 @@ user_reg_map_name_to_regnum (struct gdbarch *gdbarch, const char *name,
      specific register override the user registers.  */
   {
     int i;
-    int maxregs = (gdbarch_num_regs (gdbarch)
-                  + gdbarch_num_pseudo_regs (gdbarch));
+    int maxregs = gdbarch_num_cooked_regs (gdbarch);
 
     for (i = 0; i < maxregs; i++)
       {
@@ -152,7 +157,8 @@ user_reg_map_name_to_regnum (struct gdbarch *gdbarch, const char *name,
 
   /* Search the user name space.  */
   {
-    struct gdb_user_regs *regs = gdbarch_data (gdbarch, user_regs_data);
+    struct gdb_user_regs *regs
+      = (struct gdb_user_regs *) gdbarch_data (gdbarch, user_regs_data);
     struct user_reg *reg;
     int nr;
 
@@ -161,8 +167,7 @@ user_reg_map_name_to_regnum (struct gdbarch *gdbarch, const char *name,
        if ((len < 0 && strcmp (reg->name, name))
            || (len == strlen (reg->name)
                && strncmp (reg->name, name, len) == 0))
-         return gdbarch_num_regs (gdbarch)
-                + gdbarch_num_pseudo_regs (gdbarch) + nr;
+         return gdbarch_num_cooked_regs (gdbarch) + nr;
       }
   }
 
@@ -172,7 +177,8 @@ user_reg_map_name_to_regnum (struct gdbarch *gdbarch, const char *name,
 static struct user_reg *
 usernum_to_user_reg (struct gdbarch *gdbarch, int usernum)
 {
-  struct gdb_user_regs *regs = gdbarch_data (gdbarch, user_regs_data);
+  struct gdb_user_regs *regs
+    = (struct gdb_user_regs *) gdbarch_data (gdbarch, user_regs_data);
   struct user_reg *reg;
 
   for (reg = regs->first; reg != NULL; reg = reg->next)
@@ -187,8 +193,7 @@ usernum_to_user_reg (struct gdbarch *gdbarch, int usernum)
 const char *
 user_reg_map_regnum_to_name (struct gdbarch *gdbarch, int regnum)
 {
-  int maxregs = (gdbarch_num_regs (gdbarch)
-                + gdbarch_num_pseudo_regs (gdbarch));
+  int maxregs = gdbarch_num_cooked_regs (gdbarch);
 
   if (regnum < 0)
     return NULL;
@@ -208,18 +213,37 @@ struct value *
 value_of_user_reg (int regnum, struct frame_info *frame)
 {
   struct gdbarch *gdbarch = get_frame_arch (frame);
-  int maxregs = (gdbarch_num_regs (gdbarch)
-                + gdbarch_num_pseudo_regs (gdbarch));
+  int maxregs = gdbarch_num_cooked_regs (gdbarch);
   struct user_reg *reg = usernum_to_user_reg (gdbarch, regnum - maxregs);
 
   gdb_assert (reg != NULL);
-  return reg->read (frame, reg->baton);
+  return reg->xread (frame, reg->baton);
 }
 
-extern initialize_file_ftype _initialize_user_regs; /* -Wmissing-prototypes */
+static void
+maintenance_print_user_registers (const char *args, int from_tty)
+{
+  struct gdbarch *gdbarch = get_current_arch ();
+  struct gdb_user_regs *regs;
+  struct user_reg *reg;
+  int regnum;
+
+  regs = (struct gdb_user_regs *) gdbarch_data (gdbarch, user_regs_data);
+  regnum = gdbarch_num_cooked_regs (gdbarch);
 
+  fprintf_unfiltered (gdb_stdout, " %-11s %3s\n", "Name", "Nr");
+  for (reg = regs->first; reg != NULL; reg = reg->next, ++regnum)
+    fprintf_unfiltered (gdb_stdout, " %-11s %3d\n", reg->name, regnum);
+}
+
+void _initialize_user_regs ();
 void
-_initialize_user_regs (void)
+_initialize_user_regs ()
 {
   user_regs_data = gdbarch_data_register_post_init (user_regs_init);
+
+  add_cmd ("user-registers", class_maintenance,
+          maintenance_print_user_registers,
+          _("List the names of the current user registers."),
+          &maintenanceprintlist);
 }