/* BSD Kernel Data Access Library (libkvm) interface.
- Copyright 2004, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2004, 2005, 2007, 2008, 2009, 2010, 2011
+ 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/>. */
#include "defs.h"
#include "cli/cli-cmds.h"
#include "target.h"
#include "value.h"
#include "gdbcore.h" /* for get_exec_file */
+#include "gdbthread.h"
#include "gdb_assert.h"
#include <fcntl.h>
#ifdef HAVE_NLIST_H
#include <nlist.h>
#endif
+#include <paths.h>
#include "readline/readline.h"
#include <sys/param.h>
#include <sys/proc.h>
#include "bsd-kvm.h"
+/* Kernel memory device file. */
+static const char *bsd_kvm_corefile;
+
/* Kernel memory interface descriptor. */
-kvm_t *core_kd;
+static kvm_t *core_kd;
/* Address of process control block. */
-struct pcb *bsd_kvm_paddr;
+static struct pcb *bsd_kvm_paddr;
/* Pointer to architecture-specific function that reconstructs the
register state from PCB and supplies it to REGCACHE. */
-int (*bsd_kvm_supply_pcb)(struct regcache *regcache, struct pcb *pcb);
+static int (*bsd_kvm_supply_pcb)(struct regcache *regcache, struct pcb *pcb);
/* Target ops for libkvm interface. */
-struct target_ops bsd_kvm_ops;
+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)
}
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);
+ bsd_kvm_corefile = filename;
unpush_target (&bsd_kvm_ops);
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 ());
+ reinit_frame_cache ();
print_stack_frame (get_selected_frame (NULL), -1, 1);
}
warning (("%s"), kvm_geterr(core_kd));
core_kd = NULL;
}
+
+ inferior_ptid = null_ptid;
+ delete_thread_silent (bsd_kvm_ptid);
}
static LONGEST
}
}
+static void
+bsd_kvm_files_info (struct target_ops *ops)
+{
+ if (bsd_kvm_corefile && strcmp (bsd_kvm_corefile, _PATH_MEM) != 0)
+ printf_filtered (_("\tUsing the kernel crash dump %s.\n"),
+ bsd_kvm_corefile);
+ else
+ printf_filtered (_("\tUsing the currently running kernel.\n"));
+}
+
/* 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
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 ());
+ reinit_frame_cache ();
print_stack_frame (get_selected_frame (NULL), -1, 1);
}
bsd_kvm_pcb_cmd (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);
- flush_cached_frames ();
- select_frame (get_current_frame ());
+ reinit_frame_cache ();
print_stack_frame (get_selected_frame (NULL), -1, 1);
}
+static int
+bsd_kvm_thread_alive (struct target_ops *ops,
+ ptid_t ptid)
+{
+ return 1;
+}
+
+static char *
+bsd_kvm_pid_to_str (struct target_ops *ops, ptid_t ptid)
+{
+ static char buf[64];
+ xsnprintf (buf, sizeof buf, "<kvm>");
+ return buf;
+}
+
+static int
+bsd_kvm_return_one (struct target_ops *ops)
+{
+ return 1;
+}
+
/* Add the libkvm interface to the list of all possible targets and
register CUPPLY_PCB as the architecture-specific process control
block interpreter. */
bsd_kvm_ops.to_close = bsd_kvm_close;
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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