/* BSD Kernel Data Access Library (libkvm) interface.
- Copyright 2004, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2004-2018 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,
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/>. */
+#define _KMEMUSER
#include "defs.h"
#include "cli/cli-cmds.h"
#include "command.h"
#include "target.h"
#include "value.h"
#include "gdbcore.h" /* for get_exec_file */
+#include "gdbthread.h"
-#include "gdb_assert.h"
#include <fcntl.h>
#include <kvm.h>
#ifdef HAVE_NLIST_H
#include "readline/readline.h"
#include <sys/param.h>
#include <sys/proc.h>
+#ifdef HAVE_SYS_USER_H
#include <sys/user.h>
+#endif
#include "bsd-kvm.h"
/* Target ops for libkvm interface. */
static struct target_ops bsd_kvm_ops;
+/* This is the ptid we use while we're connected to kvm. The kvm
+ target currently doesn't export any view of the running processes,
+ so this represents the kernel task. */
+static ptid_t bsd_kvm_ptid;
+
static void
-bsd_kvm_open (char *filename, int from_tty)
+bsd_kvm_open (const char *arg, int from_tty)
{
char errbuf[_POSIX2_LINE_MAX];
char *execfile = NULL;
kvm_t *temp_kd;
+ char *filename = NULL;
target_preopen (from_tty);
- if (filename)
+ if (arg)
{
char *temp;
- filename = tilde_expand (filename);
+ filename = tilde_expand (arg);
if (filename[0] != '/')
{
temp = concat (current_directory, "/", filename, (char *)NULL);
}
execfile = get_exec_file (0);
- temp_kd = kvm_openfiles (execfile, filename, NULL, O_RDONLY, errbuf);
+ temp_kd = kvm_openfiles (execfile, filename, NULL,
+ write_files ? O_RDWR : O_RDONLY, errbuf);
if (temp_kd == NULL)
error (("%s"), errbuf);
core_kd = temp_kd;
push_target (&bsd_kvm_ops);
- target_fetch_registers (-1);
+ add_thread_silent (bsd_kvm_ptid);
+ inferior_ptid = bsd_kvm_ptid;
+
+ target_fetch_registers (get_current_regcache (), -1);
- flush_cached_frames ();
- select_frame (get_current_frame ());
- print_stack_frame (get_selected_frame (NULL), -1, 1);
+ reinit_frame_cache ();
+ print_stack_frame (get_selected_frame (NULL), 0, SRC_AND_LOC, 1);
}
static void
-bsd_kvm_close (int quitting)
+bsd_kvm_close (struct target_ops *self)
{
if (core_kd)
{
warning (("%s"), kvm_geterr(core_kd));
core_kd = NULL;
}
+
+ inferior_ptid = null_ptid;
+ delete_thread_silent (bsd_kvm_ptid);
}
static LONGEST
return nbytes;
}
-static LONGEST
+static enum target_xfer_status
bsd_kvm_xfer_partial (struct target_ops *ops, enum target_object object,
const char *annex, gdb_byte *readbuf,
const gdb_byte *writebuf,
- ULONGEST offset, LONGEST len)
+ ULONGEST offset, ULONGEST len, ULONGEST *xfered_len)
{
switch (object)
{
case TARGET_OBJECT_MEMORY:
- return bsd_kvm_xfer_memory (offset, len, readbuf, writebuf);
+ {
+ LONGEST ret = bsd_kvm_xfer_memory (offset, len, readbuf, writebuf);
+
+ if (ret < 0)
+ return TARGET_XFER_E_IO;
+ else if (ret == 0)
+ return TARGET_XFER_EOF;
+ else
+ {
+ *xfered_len = (ULONGEST) ret;
+ return TARGET_XFER_OK;
+ }
+ }
default:
- return -1;
+ return TARGET_XFER_E_IO;
}
}
/* Fetch process control block at address PADDR. */
static int
-bsd_kvm_fetch_pcb (struct pcb *paddr)
+bsd_kvm_fetch_pcb (struct regcache *regcache, struct pcb *paddr)
{
struct pcb pcb;
error (("%s"), kvm_geterr (core_kd));
gdb_assert (bsd_kvm_supply_pcb);
- return bsd_kvm_supply_pcb (current_regcache, &pcb);
+ return bsd_kvm_supply_pcb (regcache, &pcb);
}
static void
-bsd_kvm_fetch_registers (int regnum)
+bsd_kvm_fetch_registers (struct target_ops *ops,
+ struct regcache *regcache, int regnum)
{
struct nlist nl[2];
if (bsd_kvm_paddr)
{
- bsd_kvm_fetch_pcb (bsd_kvm_paddr);
+ bsd_kvm_fetch_pcb (regcache, bsd_kvm_paddr);
return;
}
if (nl[0].n_value != 0)
{
- /* Found dumppcb. If it contains a valid context, return
+ /* Found dumppcb. If it contains a valid context, return
immediately. */
- if (bsd_kvm_fetch_pcb ((struct pcb *) nl[0].n_value))
+ if (bsd_kvm_fetch_pcb (regcache, (struct pcb *) nl[0].n_value))
return;
}
if (kvm_read (core_kd, nl[0].n_value, &paddr, sizeof paddr) == -1)
error (("%s"), kvm_geterr (core_kd));
- bsd_kvm_fetch_pcb (paddr);
+ bsd_kvm_fetch_pcb (regcache, paddr);
return;
}
if (kvm_read (core_kd, nl[0].n_value, &paddr, sizeof paddr) == -1)
error (("%s"), kvm_geterr (core_kd));
- bsd_kvm_fetch_pcb (paddr);
+ bsd_kvm_fetch_pcb (regcache, paddr);
return;
}
#endif
- /* i18n: PCB == "Process Control Block" */
+ /* i18n: PCB == "Process Control Block". */
error (_("Cannot find a valid PCB"));
}
\f
struct cmd_list_element *bsd_kvm_cmdlist;
static void
-bsd_kvm_cmd (char *arg, int fromtty)
+bsd_kvm_cmd (const char *arg, int fromtty)
{
/* ??? Should this become an alias for "target kvm"? */
}
#ifndef HAVE_STRUCT_THREAD_TD_PCB
static void
-bsd_kvm_proc_cmd (char *arg, int fromtty)
+bsd_kvm_proc_cmd (const char *arg, int fromtty)
{
CORE_ADDR addr;
if (kvm_read (core_kd, addr, &bsd_kvm_paddr, sizeof bsd_kvm_paddr) == -1)
error (("%s"), kvm_geterr (core_kd));
- target_fetch_registers (-1);
+ target_fetch_registers (get_current_regcache (), -1);
- flush_cached_frames ();
- select_frame (get_current_frame ());
- print_stack_frame (get_selected_frame (NULL), -1, 1);
+ reinit_frame_cache ();
+ print_stack_frame (get_selected_frame (NULL), 0, SRC_AND_LOC, 1);
}
#endif
static void
-bsd_kvm_pcb_cmd (char *arg, int fromtty)
+bsd_kvm_pcb_cmd (const char *arg, int fromtty)
{
if (arg == NULL)
- /* i18n: PCB == "Process Control Block" */
+ /* i18n: PCB == "Process Control Block". */
error_no_arg (_("pcb address"));
if (core_kd == NULL)
bsd_kvm_paddr = (struct pcb *)(u_long) parse_and_eval_address (arg);
- target_fetch_registers (-1);
+ target_fetch_registers (get_current_regcache (), -1);
+
+ reinit_frame_cache ();
+ print_stack_frame (get_selected_frame (NULL), 0, SRC_AND_LOC, 1);
+}
+
+static int
+bsd_kvm_thread_alive (struct target_ops *ops,
+ ptid_t ptid)
+{
+ return 1;
+}
+
+static const char *
+bsd_kvm_pid_to_str (struct target_ops *ops, ptid_t ptid)
+{
+ static char buf[64];
+ xsnprintf (buf, sizeof buf, "<kvm>");
+ return buf;
+}
- flush_cached_frames ();
- select_frame (get_current_frame ());
- print_stack_frame (get_selected_frame (NULL), -1, 1);
+static int
+bsd_kvm_return_one (struct target_ops *ops)
+{
+ return 1;
}
/* Add the libkvm interface to the list of all possible targets and
bsd_kvm_ops.to_fetch_registers = bsd_kvm_fetch_registers;
bsd_kvm_ops.to_xfer_partial = bsd_kvm_xfer_partial;
bsd_kvm_ops.to_files_info = bsd_kvm_files_info;
+ bsd_kvm_ops.to_thread_alive = bsd_kvm_thread_alive;
+ bsd_kvm_ops.to_pid_to_str = bsd_kvm_pid_to_str;
bsd_kvm_ops.to_stratum = process_stratum;
- bsd_kvm_ops.to_has_memory = 1;
- bsd_kvm_ops.to_has_stack = 1;
- bsd_kvm_ops.to_has_registers = 1;
+ bsd_kvm_ops.to_has_memory = bsd_kvm_return_one;
+ bsd_kvm_ops.to_has_stack = bsd_kvm_return_one;
+ bsd_kvm_ops.to_has_registers = bsd_kvm_return_one;
bsd_kvm_ops.to_magic = OPS_MAGIC;
add_target (&bsd_kvm_ops);
_("Set current context from proc address"), &bsd_kvm_cmdlist);
#endif
add_cmd ("pcb", class_obscure, bsd_kvm_pcb_cmd,
- /* i18n: PCB == "Process Control Block" */
+ /* i18n: PCB == "Process Control Block". */
_("Set current context from pcb address"), &bsd_kvm_cmdlist);
+
+ /* Some notes on the ptid usage on this target.
+
+ The pid field represents the kvm inferior instance. Currently,
+ we don't support multiple kvm inferiors, but we start at 1
+ anyway. The lwp field is set to != 0, in case the core wants to
+ refer to the whole kvm inferior with ptid(1,0,0).
+
+ If kvm is made to export running processes as gdb threads,
+ the following form can be used:
+ ptid (1, 1, 0) -> kvm inferior 1, in kernel
+ ptid (1, 1, 1) -> kvm inferior 1, process 1
+ ptid (1, 1, 2) -> kvm inferior 1, process 2
+ ptid (1, 1, n) -> kvm inferior 1, process n */
+
+ bsd_kvm_ptid = ptid_build (1, 1, 0);
}
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