812 lines
21 KiB
C
812 lines
21 KiB
C
/* Native-dependent code for NetBSD.
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Copyright (C) 2006-2022 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "netbsd-nat.h"
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#include "nat/netbsd-nat.h"
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#include "gdbthread.h"
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#include "netbsd-tdep.h"
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#include "inferior.h"
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#include "gdbarch.h"
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#include <sys/types.h>
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#include <sys/ptrace.h>
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#include <sys/sysctl.h>
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#include <sys/wait.h>
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/* Return the name of a file that can be opened to get the symbols for
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the child process identified by PID. */
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const char *
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nbsd_nat_target::pid_to_exec_file (int pid)
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{
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return netbsd_nat::pid_to_exec_file (pid);
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}
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/* Return the current directory for the process identified by PID. */
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static std::string
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nbsd_pid_to_cwd (int pid)
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{
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char buf[PATH_MAX];
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size_t buflen;
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int mib[4] = {CTL_KERN, KERN_PROC_ARGS, pid, KERN_PROC_CWD};
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buflen = sizeof (buf);
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if (sysctl (mib, ARRAY_SIZE (mib), buf, &buflen, NULL, 0))
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return "";
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return buf;
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}
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/* Return the kinfo_proc2 structure for the process identified by PID. */
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static bool
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nbsd_pid_to_kinfo_proc2 (pid_t pid, struct kinfo_proc2 *kp)
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{
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gdb_assert (kp != nullptr);
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size_t size = sizeof (*kp);
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int mib[6] = {CTL_KERN, KERN_PROC2, KERN_PROC_PID, pid,
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static_cast<int> (size), 1};
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return !sysctl (mib, ARRAY_SIZE (mib), kp, &size, NULL, 0);
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}
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/* Return the command line for the process identified by PID. */
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static gdb::unique_xmalloc_ptr<char[]>
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nbsd_pid_to_cmdline (int pid)
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{
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int mib[4] = {CTL_KERN, KERN_PROC_ARGS, pid, KERN_PROC_ARGV};
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size_t size = 0;
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if (::sysctl (mib, ARRAY_SIZE (mib), NULL, &size, NULL, 0) == -1 || size == 0)
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return nullptr;
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gdb::unique_xmalloc_ptr<char[]> args (XNEWVAR (char, size));
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if (::sysctl (mib, ARRAY_SIZE (mib), args.get (), &size, NULL, 0) == -1
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|| size == 0)
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return nullptr;
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/* Arguments are returned as a flattened string with NUL separators.
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Join the arguments with spaces to form a single string. */
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for (size_t i = 0; i < size - 1; i++)
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if (args[i] == '\0')
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args[i] = ' ';
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args[size - 1] = '\0';
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return args;
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}
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/* Return true if PTID is still active in the inferior. */
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bool
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nbsd_nat_target::thread_alive (ptid_t ptid)
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{
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return netbsd_nat::thread_alive (ptid);
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}
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/* Return the name assigned to a thread by an application. Returns
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the string in a static buffer. */
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const char *
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nbsd_nat_target::thread_name (struct thread_info *thr)
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{
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ptid_t ptid = thr->ptid;
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return netbsd_nat::thread_name (ptid);
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}
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/* Implement the "post_attach" target_ops method. */
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static void
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nbsd_add_threads (nbsd_nat_target *target, pid_t pid)
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{
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auto fn
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= [&target] (ptid_t ptid)
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{
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if (!in_thread_list (target, ptid))
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{
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if (inferior_ptid.lwp () == 0)
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thread_change_ptid (target, inferior_ptid, ptid);
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else
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add_thread (target, ptid);
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}
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};
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netbsd_nat::for_each_thread (pid, fn);
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}
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/* Implement the virtual inf_ptrace_target::post_startup_inferior method. */
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void
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nbsd_nat_target::post_startup_inferior (ptid_t ptid)
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{
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netbsd_nat::enable_proc_events (ptid.pid ());
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}
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/* Implement the "post_attach" target_ops method. */
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void
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nbsd_nat_target::post_attach (int pid)
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{
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netbsd_nat::enable_proc_events (pid);
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nbsd_add_threads (this, pid);
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}
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/* Implement the "update_thread_list" target_ops method. */
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void
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nbsd_nat_target::update_thread_list ()
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{
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delete_exited_threads ();
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}
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/* Convert PTID to a string. */
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std::string
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nbsd_nat_target::pid_to_str (ptid_t ptid)
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{
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int lwp = ptid.lwp ();
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if (lwp != 0)
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{
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pid_t pid = ptid.pid ();
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return string_printf ("LWP %d of process %d", lwp, pid);
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}
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return normal_pid_to_str (ptid);
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}
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/* Retrieve all the memory regions in the specified process. */
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static gdb::unique_xmalloc_ptr<struct kinfo_vmentry[]>
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nbsd_kinfo_get_vmmap (pid_t pid, size_t *size)
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{
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int mib[5] = {CTL_VM, VM_PROC, VM_PROC_MAP, pid,
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sizeof (struct kinfo_vmentry)};
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size_t length = 0;
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if (sysctl (mib, ARRAY_SIZE (mib), NULL, &length, NULL, 0))
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{
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*size = 0;
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return NULL;
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}
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/* Prereserve more space. The length argument is volatile and can change
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between the sysctl(3) calls as this function can be called against a
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running process. */
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length = length * 5 / 3;
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gdb::unique_xmalloc_ptr<struct kinfo_vmentry[]> kiv
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(XNEWVAR (kinfo_vmentry, length));
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if (sysctl (mib, ARRAY_SIZE (mib), kiv.get (), &length, NULL, 0))
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{
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*size = 0;
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return NULL;
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}
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*size = length / sizeof (struct kinfo_vmentry);
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return kiv;
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}
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/* Iterate over all the memory regions in the current inferior,
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calling FUNC for each memory region. OBFD is passed as the last
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argument to FUNC. */
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int
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nbsd_nat_target::find_memory_regions (find_memory_region_ftype func,
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void *data)
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{
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pid_t pid = inferior_ptid.pid ();
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size_t nitems;
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gdb::unique_xmalloc_ptr<struct kinfo_vmentry[]> vmentl
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= nbsd_kinfo_get_vmmap (pid, &nitems);
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if (vmentl == NULL)
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perror_with_name (_("Couldn't fetch VM map entries"));
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for (size_t i = 0; i < nitems; i++)
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{
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struct kinfo_vmentry *kve = &vmentl[i];
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/* Skip unreadable segments and those where MAP_NOCORE has been set. */
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if (!(kve->kve_protection & KVME_PROT_READ)
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|| kve->kve_flags & KVME_FLAG_NOCOREDUMP)
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continue;
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/* Skip segments with an invalid type. */
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switch (kve->kve_type)
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{
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case KVME_TYPE_VNODE:
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case KVME_TYPE_ANON:
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case KVME_TYPE_SUBMAP:
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case KVME_TYPE_OBJECT:
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break;
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default:
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continue;
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}
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size_t size = kve->kve_end - kve->kve_start;
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if (info_verbose)
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{
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gdb_printf ("Save segment, %ld bytes at %s (%c%c%c)\n",
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(long) size,
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paddress (target_gdbarch (), kve->kve_start),
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kve->kve_protection & KVME_PROT_READ ? 'r' : '-',
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kve->kve_protection & KVME_PROT_WRITE ? 'w' : '-',
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kve->kve_protection & KVME_PROT_EXEC ? 'x' : '-');
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}
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/* Invoke the callback function to create the corefile segment.
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Pass MODIFIED as true, we do not know the real modification state. */
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func (kve->kve_start, size, kve->kve_protection & KVME_PROT_READ,
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kve->kve_protection & KVME_PROT_WRITE,
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kve->kve_protection & KVME_PROT_EXEC, 1, data);
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}
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return 0;
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}
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/* Implement the "info_proc" target_ops method. */
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bool
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nbsd_nat_target::info_proc (const char *args, enum info_proc_what what)
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{
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pid_t pid;
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bool do_cmdline = false;
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bool do_cwd = false;
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bool do_exe = false;
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bool do_mappings = false;
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bool do_status = false;
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switch (what)
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{
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case IP_MINIMAL:
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do_cmdline = true;
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do_cwd = true;
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do_exe = true;
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break;
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case IP_STAT:
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case IP_STATUS:
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do_status = true;
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break;
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case IP_MAPPINGS:
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do_mappings = true;
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break;
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case IP_CMDLINE:
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do_cmdline = true;
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break;
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case IP_EXE:
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do_exe = true;
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break;
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case IP_CWD:
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do_cwd = true;
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break;
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case IP_ALL:
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do_cmdline = true;
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do_cwd = true;
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do_exe = true;
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do_mappings = true;
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do_status = true;
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break;
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default:
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error (_("Not supported on this target."));
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}
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gdb_argv built_argv (args);
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if (built_argv.count () == 0)
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{
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pid = inferior_ptid.pid ();
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if (pid == 0)
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error (_("No current process: you must name one."));
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}
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else if (built_argv.count () == 1 && isdigit (built_argv[0][0]))
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pid = strtol (built_argv[0], NULL, 10);
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else
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error (_("Invalid arguments."));
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gdb_printf (_("process %d\n"), pid);
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if (do_cmdline)
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{
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gdb::unique_xmalloc_ptr<char[]> cmdline = nbsd_pid_to_cmdline (pid);
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if (cmdline != nullptr)
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gdb_printf ("cmdline = '%s'\n", cmdline.get ());
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else
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warning (_("unable to fetch command line"));
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}
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if (do_cwd)
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{
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std::string cwd = nbsd_pid_to_cwd (pid);
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if (cwd != "")
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gdb_printf ("cwd = '%s'\n", cwd.c_str ());
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else
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warning (_("unable to fetch current working directory"));
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}
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if (do_exe)
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{
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const char *exe = pid_to_exec_file (pid);
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if (exe != nullptr)
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gdb_printf ("exe = '%s'\n", exe);
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else
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warning (_("unable to fetch executable path name"));
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}
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if (do_mappings)
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{
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size_t nvment;
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gdb::unique_xmalloc_ptr<struct kinfo_vmentry[]> vmentl
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= nbsd_kinfo_get_vmmap (pid, &nvment);
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if (vmentl != nullptr)
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{
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int addr_bit = TARGET_CHAR_BIT * sizeof (void *);
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nbsd_info_proc_mappings_header (addr_bit);
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struct kinfo_vmentry *kve = vmentl.get ();
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for (int i = 0; i < nvment; i++, kve++)
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nbsd_info_proc_mappings_entry (addr_bit, kve->kve_start,
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kve->kve_end, kve->kve_offset,
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kve->kve_flags, kve->kve_protection,
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kve->kve_path);
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}
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else
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warning (_("unable to fetch virtual memory map"));
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}
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if (do_status)
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{
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struct kinfo_proc2 kp;
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if (!nbsd_pid_to_kinfo_proc2 (pid, &kp))
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warning (_("Failed to fetch process information"));
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else
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{
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auto process_status
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= [] (int8_t stat)
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{
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switch (stat)
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{
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case SIDL:
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return "IDL";
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case SACTIVE:
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return "ACTIVE";
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case SDYING:
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return "DYING";
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case SSTOP:
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return "STOP";
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case SZOMB:
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return "ZOMB";
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case SDEAD:
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return "DEAD";
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default:
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return "? (unknown)";
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}
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};
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gdb_printf ("Name: %s\n", kp.p_comm);
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gdb_printf ("State: %s\n", process_status(kp.p_realstat));
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gdb_printf ("Parent process: %" PRId32 "\n", kp.p_ppid);
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gdb_printf ("Process group: %" PRId32 "\n", kp.p__pgid);
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gdb_printf ("Session id: %" PRId32 "\n", kp.p_sid);
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gdb_printf ("TTY: %" PRId32 "\n", kp.p_tdev);
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gdb_printf ("TTY owner process group: %" PRId32 "\n", kp.p_tpgid);
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gdb_printf ("User IDs (real, effective, saved): "
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"%" PRIu32 " %" PRIu32 " %" PRIu32 "\n",
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kp.p_ruid, kp.p_uid, kp.p_svuid);
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gdb_printf ("Group IDs (real, effective, saved): "
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"%" PRIu32 " %" PRIu32 " %" PRIu32 "\n",
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kp.p_rgid, kp.p_gid, kp.p_svgid);
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gdb_printf ("Groups:");
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for (int i = 0; i < kp.p_ngroups; i++)
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gdb_printf (" %" PRIu32, kp.p_groups[i]);
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gdb_printf ("\n");
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gdb_printf ("Minor faults (no memory page): %" PRIu64 "\n",
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kp.p_uru_minflt);
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gdb_printf ("Major faults (memory page faults): %" PRIu64 "\n",
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kp.p_uru_majflt);
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gdb_printf ("utime: %" PRIu32 ".%06" PRIu32 "\n",
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kp.p_uutime_sec, kp.p_uutime_usec);
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gdb_printf ("stime: %" PRIu32 ".%06" PRIu32 "\n",
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kp.p_ustime_sec, kp.p_ustime_usec);
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gdb_printf ("utime+stime, children: %" PRIu32 ".%06" PRIu32 "\n",
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kp.p_uctime_sec, kp.p_uctime_usec);
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gdb_printf ("'nice' value: %" PRIu8 "\n", kp.p_nice);
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gdb_printf ("Start time: %" PRIu32 ".%06" PRIu32 "\n",
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kp.p_ustart_sec, kp.p_ustart_usec);
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int pgtok = getpagesize () / 1024;
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gdb_printf ("Data size: %" PRIuMAX " kB\n",
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(uintmax_t) kp.p_vm_dsize * pgtok);
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gdb_printf ("Stack size: %" PRIuMAX " kB\n",
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(uintmax_t) kp.p_vm_ssize * pgtok);
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gdb_printf ("Text size: %" PRIuMAX " kB\n",
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(uintmax_t) kp.p_vm_tsize * pgtok);
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gdb_printf ("Resident set size: %" PRIuMAX " kB\n",
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(uintmax_t) kp.p_vm_rssize * pgtok);
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gdb_printf ("Maximum RSS: %" PRIu64 " kB\n", kp.p_uru_maxrss);
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gdb_printf ("Pending Signals:");
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for (size_t i = 0; i < ARRAY_SIZE (kp.p_siglist.__bits); i++)
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gdb_printf (" %08" PRIx32, kp.p_siglist.__bits[i]);
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gdb_printf ("\n");
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gdb_printf ("Ignored Signals:");
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for (size_t i = 0; i < ARRAY_SIZE (kp.p_sigignore.__bits); i++)
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gdb_printf (" %08" PRIx32, kp.p_sigignore.__bits[i]);
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gdb_printf ("\n");
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gdb_printf ("Caught Signals:");
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for (size_t i = 0; i < ARRAY_SIZE (kp.p_sigcatch.__bits); i++)
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gdb_printf (" %08" PRIx32, kp.p_sigcatch.__bits[i]);
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gdb_printf ("\n");
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}
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}
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return true;
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}
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/* Resume execution of a specified PTID, that points to a process or a thread
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within a process. If one thread is specified, all other threads are
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suspended. If STEP is nonzero, single-step it. If SIGNAL is nonzero,
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give it that signal. */
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static void
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nbsd_resume(nbsd_nat_target *target, ptid_t ptid, int step,
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enum gdb_signal signal)
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{
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int request;
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gdb_assert (minus_one_ptid != ptid);
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if (ptid.lwp_p ())
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{
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/* If ptid is a specific LWP, suspend all other LWPs in the process. */
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inferior *inf = find_inferior_ptid (target, ptid);
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for (thread_info *tp : inf->non_exited_threads ())
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{
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if (tp->ptid.lwp () == ptid.lwp ())
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request = PT_RESUME;
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else
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request = PT_SUSPEND;
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if (ptrace (request, tp->ptid.pid (), NULL, tp->ptid.lwp ()) == -1)
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perror_with_name (("ptrace"));
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}
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}
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else
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{
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/* If ptid is a wildcard, resume all matching threads (they won't run
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until the process is continued however). */
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|
for (thread_info *tp : all_non_exited_threads (target, ptid))
|
|
if (ptrace (PT_RESUME, tp->ptid.pid (), NULL, tp->ptid.lwp ()) == -1)
|
|
perror_with_name (("ptrace"));
|
|
}
|
|
|
|
if (step)
|
|
{
|
|
for (thread_info *tp : all_non_exited_threads (target, ptid))
|
|
if (ptrace (PT_SETSTEP, tp->ptid.pid (), NULL, tp->ptid.lwp ()) == -1)
|
|
perror_with_name (("ptrace"));
|
|
}
|
|
else
|
|
{
|
|
for (thread_info *tp : all_non_exited_threads (target, ptid))
|
|
if (ptrace (PT_CLEARSTEP, tp->ptid.pid (), NULL, tp->ptid.lwp ()) == -1)
|
|
perror_with_name (("ptrace"));
|
|
}
|
|
|
|
if (catch_syscall_enabled () > 0)
|
|
request = PT_SYSCALL;
|
|
else
|
|
request = PT_CONTINUE;
|
|
|
|
/* An address of (void *)1 tells ptrace to continue from
|
|
where it was. If GDB wanted it to start some other way, we have
|
|
already written a new program counter value to the child. */
|
|
if (ptrace (request, ptid.pid (), (void *)1, gdb_signal_to_host (signal)) == -1)
|
|
perror_with_name (("ptrace"));
|
|
}
|
|
|
|
/* Resume execution of thread PTID, or all threads of all inferiors
|
|
if PTID is -1. If STEP is nonzero, single-step it. If SIGNAL is nonzero,
|
|
give it that signal. */
|
|
|
|
void
|
|
nbsd_nat_target::resume (ptid_t ptid, int step, enum gdb_signal signal)
|
|
{
|
|
if (minus_one_ptid != ptid)
|
|
nbsd_resume (this, ptid, step, signal);
|
|
else
|
|
{
|
|
for (inferior *inf : all_non_exited_inferiors (this))
|
|
nbsd_resume (this, ptid_t (inf->pid, 0, 0), step, signal);
|
|
}
|
|
}
|
|
|
|
/* Implement a safe wrapper around waitpid(). */
|
|
|
|
static pid_t
|
|
nbsd_wait (ptid_t ptid, struct target_waitstatus *ourstatus,
|
|
target_wait_flags options)
|
|
{
|
|
pid_t pid;
|
|
int status;
|
|
|
|
set_sigint_trap ();
|
|
|
|
do
|
|
{
|
|
/* The common code passes WNOHANG that leads to crashes, overwrite it. */
|
|
pid = waitpid (ptid.pid (), &status, 0);
|
|
}
|
|
while (pid == -1 && errno == EINTR);
|
|
|
|
clear_sigint_trap ();
|
|
|
|
if (pid == -1)
|
|
perror_with_name (_("Child process unexpectedly missing"));
|
|
|
|
*ourstatus = host_status_to_waitstatus (status);
|
|
return pid;
|
|
}
|
|
|
|
/* Wait for the child specified by PTID to do something. Return the
|
|
process ID of the child, or MINUS_ONE_PTID in case of error; store
|
|
the status in *OURSTATUS. */
|
|
|
|
ptid_t
|
|
nbsd_nat_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus,
|
|
target_wait_flags target_options)
|
|
{
|
|
pid_t pid = nbsd_wait (ptid, ourstatus, target_options);
|
|
ptid_t wptid = ptid_t (pid);
|
|
|
|
/* If the child stopped, keep investigating its status. */
|
|
if (ourstatus->kind () != TARGET_WAITKIND_STOPPED)
|
|
return wptid;
|
|
|
|
/* Extract the event and thread that received a signal. */
|
|
ptrace_siginfo_t psi;
|
|
if (ptrace (PT_GET_SIGINFO, pid, &psi, sizeof (psi)) == -1)
|
|
perror_with_name (("ptrace"));
|
|
|
|
/* Pick child's siginfo_t. */
|
|
siginfo_t *si = &psi.psi_siginfo;
|
|
|
|
int lwp = psi.psi_lwpid;
|
|
|
|
int signo = si->si_signo;
|
|
const int code = si->si_code;
|
|
|
|
/* Construct PTID with a specified thread that received the event.
|
|
If a signal was targeted to the whole process, lwp is 0. */
|
|
wptid = ptid_t (pid, lwp, 0);
|
|
|
|
/* Bail out on non-debugger oriented signals.. */
|
|
if (signo != SIGTRAP)
|
|
return wptid;
|
|
|
|
/* Stop examining non-debugger oriented SIGTRAP codes. */
|
|
if (code <= SI_USER || code == SI_NOINFO)
|
|
return wptid;
|
|
|
|
/* Process state for threading events */
|
|
ptrace_state_t pst = {};
|
|
if (code == TRAP_LWP)
|
|
{
|
|
if (ptrace (PT_GET_PROCESS_STATE, pid, &pst, sizeof (pst)) == -1)
|
|
perror_with_name (("ptrace"));
|
|
}
|
|
|
|
if (code == TRAP_LWP && pst.pe_report_event == PTRACE_LWP_EXIT)
|
|
{
|
|
/* If GDB attaches to a multi-threaded process, exiting
|
|
threads might be skipped during post_attach that
|
|
have not yet reported their PTRACE_LWP_EXIT event.
|
|
Ignore exited events for an unknown LWP. */
|
|
thread_info *thr = find_thread_ptid (this, wptid);
|
|
if (thr == nullptr)
|
|
ourstatus->set_spurious ();
|
|
else
|
|
{
|
|
/* NetBSD does not store an LWP exit status. */
|
|
ourstatus->set_thread_exited (0);
|
|
|
|
if (print_thread_events)
|
|
gdb_printf (_("[%s exited]\n"),
|
|
target_pid_to_str (wptid).c_str ());
|
|
delete_thread (thr);
|
|
}
|
|
|
|
/* The GDB core expects that the rest of the threads are running. */
|
|
if (ptrace (PT_CONTINUE, pid, (void *) 1, 0) == -1)
|
|
perror_with_name (("ptrace"));
|
|
|
|
return wptid;
|
|
}
|
|
|
|
if (in_thread_list (this, ptid_t (pid)))
|
|
thread_change_ptid (this, ptid_t (pid), wptid);
|
|
|
|
if (code == TRAP_LWP && pst.pe_report_event == PTRACE_LWP_CREATE)
|
|
{
|
|
/* If GDB attaches to a multi-threaded process, newborn
|
|
threads might be added by nbsd_add_threads that have
|
|
not yet reported their PTRACE_LWP_CREATE event. Ignore
|
|
born events for an already-known LWP. */
|
|
if (in_thread_list (this, wptid))
|
|
ourstatus->set_spurious ();
|
|
else
|
|
{
|
|
add_thread (this, wptid);
|
|
ourstatus->set_thread_created ();
|
|
}
|
|
return wptid;
|
|
}
|
|
|
|
if (code == TRAP_EXEC)
|
|
{
|
|
ourstatus->set_execd (make_unique_xstrdup (pid_to_exec_file (pid)));
|
|
return wptid;
|
|
}
|
|
|
|
if (code == TRAP_TRACE)
|
|
{
|
|
/* Unhandled at this level. */
|
|
return wptid;
|
|
}
|
|
|
|
if (code == TRAP_SCE || code == TRAP_SCX)
|
|
{
|
|
int sysnum = si->si_sysnum;
|
|
|
|
if (!catch_syscall_enabled () || !catching_syscall_number (sysnum))
|
|
{
|
|
/* If the core isn't interested in this event, ignore it. */
|
|
ourstatus->set_spurious ();
|
|
return wptid;
|
|
}
|
|
|
|
if (code == TRAP_SCE)
|
|
ourstatus->set_syscall_entry (sysnum);
|
|
else
|
|
ourstatus->set_syscall_return (sysnum);
|
|
return wptid;
|
|
}
|
|
|
|
if (code == TRAP_BRKPT)
|
|
{
|
|
/* Unhandled at this level. */
|
|
return wptid;
|
|
}
|
|
|
|
/* Unclassified SIGTRAP event. */
|
|
ourstatus->set_spurious ();
|
|
return wptid;
|
|
}
|
|
|
|
/* Implement the "insert_exec_catchpoint" target_ops method. */
|
|
|
|
int
|
|
nbsd_nat_target::insert_exec_catchpoint (int pid)
|
|
{
|
|
/* Nothing to do. */
|
|
return 0;
|
|
}
|
|
|
|
/* Implement the "remove_exec_catchpoint" target_ops method. */
|
|
|
|
int
|
|
nbsd_nat_target::remove_exec_catchpoint (int pid)
|
|
{
|
|
/* Nothing to do. */
|
|
return 0;
|
|
}
|
|
|
|
/* Implement the "set_syscall_catchpoint" target_ops method. */
|
|
|
|
int
|
|
nbsd_nat_target::set_syscall_catchpoint (int pid, bool needed,
|
|
int any_count,
|
|
gdb::array_view<const int> syscall_counts)
|
|
{
|
|
/* Ignore the arguments. inf-ptrace.c will use PT_SYSCALL which
|
|
will catch all system call entries and exits. The system calls
|
|
are filtered by GDB rather than the kernel. */
|
|
return 0;
|
|
}
|
|
|
|
/* Implement the "supports_multi_process" target_ops method. */
|
|
|
|
bool
|
|
nbsd_nat_target::supports_multi_process ()
|
|
{
|
|
return true;
|
|
}
|
|
|
|
/* Implement the "xfer_partial" target_ops method. */
|
|
|
|
enum target_xfer_status
|
|
nbsd_nat_target::xfer_partial (enum target_object object,
|
|
const char *annex, gdb_byte *readbuf,
|
|
const gdb_byte *writebuf,
|
|
ULONGEST offset, ULONGEST len,
|
|
ULONGEST *xfered_len)
|
|
{
|
|
pid_t pid = inferior_ptid.pid ();
|
|
|
|
switch (object)
|
|
{
|
|
case TARGET_OBJECT_SIGNAL_INFO:
|
|
{
|
|
len = netbsd_nat::qxfer_siginfo(pid, annex, readbuf, writebuf, offset,
|
|
len);
|
|
|
|
if (len == -1)
|
|
return TARGET_XFER_E_IO;
|
|
|
|
*xfered_len = len;
|
|
return TARGET_XFER_OK;
|
|
}
|
|
case TARGET_OBJECT_MEMORY:
|
|
{
|
|
size_t xfered;
|
|
int res;
|
|
if (writebuf != nullptr)
|
|
res = netbsd_nat::write_memory (pid, writebuf, offset, len, &xfered);
|
|
else
|
|
res = netbsd_nat::read_memory (pid, readbuf, offset, len, &xfered);
|
|
if (res != 0)
|
|
{
|
|
if (res == EACCES)
|
|
gdb_printf (gdb_stderr, "Cannot %s process at %s (%s). "
|
|
"Is PaX MPROTECT active? See security(7), "
|
|
"sysctl(7), paxctl(8)\n",
|
|
(writebuf ? "write to" : "read from"),
|
|
pulongest (offset), safe_strerror (errno));
|
|
return TARGET_XFER_E_IO;
|
|
}
|
|
if (xfered == 0)
|
|
return TARGET_XFER_EOF;
|
|
*xfered_len = (ULONGEST) xfered;
|
|
return TARGET_XFER_OK;
|
|
}
|
|
default:
|
|
return inf_ptrace_target::xfer_partial (object, annex,
|
|
readbuf, writebuf, offset,
|
|
len, xfered_len);
|
|
}
|
|
}
|
|
|
|
/* Implement the "supports_dumpcore" target_ops method. */
|
|
|
|
bool
|
|
nbsd_nat_target::supports_dumpcore ()
|
|
{
|
|
return true;
|
|
}
|
|
|
|
/* Implement the "dumpcore" target_ops method. */
|
|
|
|
void
|
|
nbsd_nat_target::dumpcore (const char *filename)
|
|
{
|
|
pid_t pid = inferior_ptid.pid ();
|
|
|
|
if (ptrace (PT_DUMPCORE, pid, const_cast<char *>(filename),
|
|
strlen (filename)) == -1)
|
|
perror_with_name (("ptrace"));
|
|
}
|