/* User visible, per-frame registers, for GDB, the GNU debugger.
- Copyright 2002 Free Software Foundation, Inc.
+ Copyright (C) 2002-2014 Free Software Foundation, Inc.
Contributed by Red Hat.
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., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "user-regs.h"
#include "gdbtypes.h"
-#include "gdb_string.h"
+#include <string.h>
#include "gdb_assert.h"
#include "frame.h"
/* A table of user registers.
User registers have regnum's that live above of the range [0
- .. NUM_REGS + NUM_PSEUDO_REGS) (which is controlled by the target).
+ .. gdbarch_num_regs + gdbarch_num_pseudo_regs)
+ (which is controlled by the target).
The target should never see a user register's regnum value.
Always append, never delete. By doing this, the relative regnum
- (offset from NUM_REGS + NUM_PSEUDO_REGS) assigned to each user
- register never changes. */
+ (offset from gdbarch_num_regs + gdbarch_num_pseudo_regs)
+ assigned to each user register never changes. */
struct user_reg
{
const char *name;
- struct value *(*read) (struct frame_info * frame);
+ struct value *(*read) (struct frame_info * frame, const void *baton);
+ const void *baton;
+ struct user_reg *next;
};
-struct user_regs
+/* This structure is named gdb_user_regs instead of user_regs to avoid
+ conflicts with any "struct user_regs" in system headers. For instance,
+ on ARM GNU/Linux native builds, nm-linux.h includes <signal.h> includes
+ <sys/ucontext.h> includes <sys/procfs.h> includes <sys/user.h>, which
+ declares "struct user_regs". */
+
+struct gdb_user_regs
{
- struct user_reg *user;
- int nr;
+ struct user_reg *first;
+ struct user_reg **last;
};
static void
-append_user_reg (struct user_regs *regs,
- const char *name, user_reg_read_ftype *read)
+append_user_reg (struct gdb_user_regs *regs, const char *name,
+ user_reg_read_ftype *read, const void *baton,
+ struct user_reg *reg)
{
- regs->nr++;
- regs->user = xrealloc (regs->user,
- regs->nr * sizeof (struct user_reg));
- regs->user[regs->nr - 1].name = name;
- regs->user[regs->nr - 1].read = read;
+ /* The caller is responsible for allocating memory needed to store
+ the register. By doing this, the function can operate on a
+ register list stored in the common heap or a specific obstack. */
+ gdb_assert (reg != NULL);
+ reg->name = name;
+ reg->read = read;
+ reg->baton = baton;
+ reg->next = NULL;
+ (*regs->last) = reg;
+ regs->last = &(*regs->last)->next;
}
/* An array of the builtin user registers. */
-static struct user_regs builtin_user_regs;
+static struct gdb_user_regs builtin_user_regs = {
+ NULL, &builtin_user_regs.first
+};
void
-user_reg_add_builtin (const char *name, user_reg_read_ftype *read)
+user_reg_add_builtin (const char *name, user_reg_read_ftype *read,
+ const void *baton)
{
- append_user_reg (&builtin_user_regs, name, read);
+ append_user_reg (&builtin_user_regs, name, read, baton,
+ XNEW (struct user_reg));
}
/* Per-architecture user registers. Start with the builtin user
static void *
user_regs_init (struct gdbarch *gdbarch)
{
- int i;
- struct user_regs *regs = XMALLOC (struct user_regs);
- memset (regs, 0, sizeof (struct user_regs));
- for (i = 0; i < builtin_user_regs.nr; i++)
- append_user_reg (regs, builtin_user_regs.user[i].name,
- builtin_user_regs.user[i].read);
+ struct user_reg *reg;
+ struct gdb_user_regs *regs
+ = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct gdb_user_regs);
+
+ regs->last = ®s->first;
+ for (reg = builtin_user_regs.first; reg != NULL; reg = reg->next)
+ append_user_reg (regs, reg->name, reg->read, reg->baton,
+ GDBARCH_OBSTACK_ZALLOC (gdbarch, struct user_reg));
return regs;
}
-static void
-user_regs_free (struct gdbarch *gdbarch, void *data)
-{
- struct user_regs *regs = data;
- xfree (regs->user);
- xfree (regs);
-}
-
void
user_reg_add (struct gdbarch *gdbarch, const char *name,
- user_reg_read_ftype *read)
+ user_reg_read_ftype *read, const void *baton)
{
- struct user_regs *regs = gdbarch_data (gdbarch, user_regs_data);
+ struct gdb_user_regs *regs = gdbarch_data (gdbarch, user_regs_data);
+
if (regs == NULL)
{
/* ULGH, called during architecture initialization. Patch
things up. */
regs = user_regs_init (gdbarch);
- set_gdbarch_data (gdbarch, user_regs_data, regs);
+ deprecated_set_gdbarch_data (gdbarch, user_regs_data, regs);
}
- append_user_reg (regs, name, read);
+ append_user_reg (regs, name, read, baton,
+ GDBARCH_OBSTACK_ZALLOC (gdbarch, struct user_reg));
}
int
int i;
int maxregs = (gdbarch_num_regs (gdbarch)
+ gdbarch_num_pseudo_regs (gdbarch));
+
for (i = 0; i < maxregs; i++)
{
const char *regname = gdbarch_register_name (gdbarch, i);
+
if (regname != NULL && len == strlen (regname)
&& strncmp (regname, name, len) == 0)
{
/* Search the user name space. */
{
- struct user_regs *regs = gdbarch_data (gdbarch, user_regs_data);
- int reg;
- for (reg = 0; reg < regs->nr; reg++)
+ struct gdb_user_regs *regs = gdbarch_data (gdbarch, user_regs_data);
+ struct user_reg *reg;
+ int nr;
+
+ for (nr = 0, reg = regs->first; reg != NULL; reg = reg->next, nr++)
{
- if ((len < 0 && strcmp (regs->user[reg].name, name))
- || (len == strlen (regs->user[reg].name)
- && strncmp (regs->user[reg].name, name, len) == 0))
- return NUM_REGS + NUM_PSEUDO_REGS + reg;
+ 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 -1;
}
+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 user_reg *reg;
+
+ for (reg = regs->first; reg != NULL; reg = reg->next)
+ {
+ if (usernum == 0)
+ return reg;
+ usernum--;
+ }
+ return NULL;
+}
+
const char *
user_reg_map_regnum_to_name (struct gdbarch *gdbarch, int regnum)
{
int maxregs = (gdbarch_num_regs (gdbarch)
+ gdbarch_num_pseudo_regs (gdbarch));
- struct user_regs *regs = gdbarch_data (gdbarch, user_regs_data);
+
if (regnum < 0)
return NULL;
- if (regnum < maxregs)
+ else if (regnum < maxregs)
return gdbarch_register_name (gdbarch, regnum);
- if (regnum < (maxregs + regs->nr))
- return regs->user[regnum - maxregs].name;
- return NULL;
+ else
+ {
+ struct user_reg *reg = usernum_to_user_reg (gdbarch, regnum - maxregs);
+ if (reg == NULL)
+ return NULL;
+ else
+ return reg->name;
+ }
}
struct value *
value_of_user_reg (int regnum, struct frame_info *frame)
{
struct gdbarch *gdbarch = get_frame_arch (frame);
- struct user_regs *regs = gdbarch_data (gdbarch, user_regs_data);
- int reg = regnum - (NUM_REGS + NUM_PSEUDO_REGS);
- gdb_assert (reg >= 0 && reg < regs->nr);
- return regs->user[reg].read (frame);
+ int maxregs = (gdbarch_num_regs (gdbarch)
+ + gdbarch_num_pseudo_regs (gdbarch));
+ struct user_reg *reg = usernum_to_user_reg (gdbarch, regnum - maxregs);
+
+ gdb_assert (reg != NULL);
+ return reg->read (frame, reg->baton);
}
extern initialize_file_ftype _initialize_user_regs; /* -Wmissing-prototypes */
void
_initialize_user_regs (void)
{
- user_regs_data = register_gdbarch_data (user_regs_init, user_regs_free);
+ user_regs_data = gdbarch_data_register_post_init (user_regs_init);
}
projects / deliverable / binutils-gdb.git / blobdiff