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Diffstat (limited to 'gdb/nto-procfs.c')
| -rw-r--r-- | gdb/nto-procfs.c | 1583 |
1 files changed, 0 insertions, 1583 deletions
diff --git a/gdb/nto-procfs.c b/gdb/nto-procfs.c deleted file mode 100644 index c310874..0000000 --- a/gdb/nto-procfs.c +++ /dev/null @@ -1,1583 +0,0 @@ -/* Machine independent support for QNX Neutrino /proc (process file system) - for GDB. Written by Colin Burgess at QNX Software Systems Limited. - - Copyright (C) 2003-2024 Free Software Foundation, Inc. - - Contributed by QNX Software Systems Ltd. - - 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 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - 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, see <http://www.gnu.org/licenses/>. */ - - -#include <fcntl.h> -#include <spawn.h> -#include <sys/debug.h> -#include <sys/procfs.h> -#include <sys/neutrino.h> -#include <sys/syspage.h> -#include <dirent.h> -#include <sys/netmgr.h> -#include <sys/auxv.h> - -#include "gdbcore.h" -#include "inferior.h" -#include "target.h" -#include "objfiles.h" -#include "gdbthread.h" -#include "nto-tdep.h" -#include "command.h" -#include "regcache.h" -#include "solib.h" -#include "inf-child.h" -#include "gdbsupport/filestuff.h" -#include "gdbsupport/scoped_fd.h" - -#define NULL_PID 0 -#define _DEBUG_FLAG_TRACE (_DEBUG_FLAG_TRACE_EXEC|_DEBUG_FLAG_TRACE_RD|\ - _DEBUG_FLAG_TRACE_WR|_DEBUG_FLAG_TRACE_MODIFY) - -int ctl_fd; - -static sighandler_t ofunc; - -static procfs_run run; - -/* Create the "native" and "procfs" targets. */ - -struct nto_procfs_target : public inf_child_target -{ - void open (const char *arg, int from_tty) override; - - void attach (const char *, int) override = 0; - - void post_attach (int); - - void detach (inferior *, int) override; - - void resume (ptid_t, int, enum gdb_signal) override; - - ptid_t wait (ptid_t, struct target_waitstatus *, target_wait_flags) override; - - void fetch_registers (struct regcache *, int) override; - void store_registers (struct regcache *, int) override; - - enum target_xfer_status xfer_partial (enum target_object object, - const char *annex, - gdb_byte *readbuf, - const gdb_byte *writebuf, - ULONGEST offset, ULONGEST len, - ULONGEST *xfered_len) override; - - void files_info () override; - - int insert_breakpoint (struct gdbarch *, struct bp_target_info *) override; - - int remove_breakpoint (struct gdbarch *, struct bp_target_info *, - enum remove_bp_reason) override; - - int can_use_hw_breakpoint (enum bptype, int, int) override; - - int insert_hw_breakpoint (struct gdbarch *, struct bp_target_info *) override; - - int remove_hw_breakpoint (struct gdbarch *, struct bp_target_info *) override; - - int insert_watchpoint (CORE_ADDR, int, enum target_hw_bp_type, - struct expression *) override; - - int remove_watchpoint (CORE_ADDR, int, enum target_hw_bp_type, - struct expression *) override; - - bool stopped_by_watchpoint () override; - - void kill () override; - - void create_inferior (const char *, const std::string &, - char **, int) override; - - void mourn_inferior () override; - - void pass_signals (gdb::array_view<const unsigned char>) override; - - bool thread_alive (ptid_t ptid) override; - - void update_thread_list () override; - - std::string pid_to_str (ptid_t) override; - - void interrupt () override; - - const char *extra_thread_info (struct thread_info *) override; - - const char *pid_to_exec_file (int pid) override; -}; - -/* For "target native". */ - -static const target_info nto_native_target_info = { - "native", - N_("QNX Neutrino local process"), - N_("QNX Neutrino local process (started by the \"run\" command).") -}; - -class nto_procfs_target_native final : public nto_procfs_target -{ - const target_info &info () const override - { return nto_native_target_info; } -}; - -/* For "target procfs <node>". */ - -static const target_info nto_procfs_target_info = { - "procfs", - N_("QNX Neutrino local or remote process"), - N_("QNX Neutrino process. target procfs NODE") -}; - -struct nto_procfs_target_procfs final : public nto_procfs_target -{ - const target_info &info () const override - { return nto_procfs_target_info; } -}; - -static ptid_t do_attach (ptid_t ptid); - -/* These two globals are only ever set in procfs_open_1, but are - referenced elsewhere. 'nto_procfs_node' is a flag used to say - whether we are local, or we should get the current node descriptor - for the remote QNX node. */ -static char *nodestr; -static unsigned nto_procfs_node = ND_LOCAL_NODE; - -/* Return the current QNX Node, or error out. This is a simple - wrapper for the netmgr_strtond() function. The reason this - is required is because QNX node descriptors are transient so - we have to re-acquire them every time. */ -static unsigned -nto_node (void) -{ - unsigned node; - - if (ND_NODE_CMP (nto_procfs_node, ND_LOCAL_NODE) == 0 - || nodestr == NULL) - return ND_LOCAL_NODE; - - node = netmgr_strtond (nodestr, 0); - if (node == -1) - error (_("Lost the QNX node. Debug session probably over.")); - - return (node); -} - -static enum gdb_osabi -procfs_is_nto_target (bfd *abfd) -{ - return GDB_OSABI_QNXNTO; -} - -/* This is called when we call 'target native' or 'target procfs - <arg>' from the (gdb) prompt. For QNX6 (nto), the only valid arg - will be a QNX node string, eg: "/net/some_node". If arg is not a - valid QNX node, we will default to local. */ -void -nto_procfs_target::open (const char *arg, int from_tty) -{ - char *endstr; - char buffer[50]; - int total_size; - procfs_sysinfo *sysinfo; - char nto_procfs_path[PATH_MAX]; - - /* Offer to kill previous inferiors before opening this target. */ - target_preopen (from_tty); - - nto_is_nto_target = procfs_is_nto_target; - - /* Set the default node used for spawning to this one, - and only override it if there is a valid arg. */ - - xfree (nodestr); - nodestr = NULL; - - nto_procfs_node = ND_LOCAL_NODE; - nodestr = (arg != NULL) ? xstrdup (arg) : NULL; - - if (nodestr) - { - nto_procfs_node = netmgr_strtond (nodestr, &endstr); - if (nto_procfs_node == -1) - { - if (errno == ENOTSUP) - gdb_printf ("QNX Net Manager not found.\n"); - gdb_printf ("Invalid QNX node %s: error %d (%s).\n", nodestr, - errno, safe_strerror (errno)); - xfree (nodestr); - nodestr = NULL; - nto_procfs_node = ND_LOCAL_NODE; - } - else if (*endstr) - { - if (*(endstr - 1) == '/') - *(endstr - 1) = 0; - else - *endstr = 0; - } - } - snprintf (nto_procfs_path, PATH_MAX - 1, "%s%s", - (nodestr != NULL) ? nodestr : "", "/proc"); - - scoped_fd fd (open (nto_procfs_path, O_RDONLY)); - if (fd.get () == -1) - { - gdb_printf ("Error opening %s : %d (%s)\n", nto_procfs_path, errno, - safe_strerror (errno)); - error (_("Invalid procfs arg")); - } - - sysinfo = (void *) buffer; - if (devctl (fd.get (), DCMD_PROC_SYSINFO, sysinfo, sizeof buffer, 0) != EOK) - { - gdb_printf ("Error getting size: %d (%s)\n", errno, - safe_strerror (errno)); - error (_("Devctl failed.")); - } - else - { - total_size = sysinfo->total_size; - sysinfo = alloca (total_size); - if (sysinfo == NULL) - { - gdb_printf ("Memory error: %d (%s)\n", errno, - safe_strerror (errno)); - error (_("alloca failed.")); - } - else - { - if (devctl (fd.get (), DCMD_PROC_SYSINFO, sysinfo, total_size, 0) - != EOK) - { - gdb_printf ("Error getting sysinfo: %d (%s)\n", errno, - safe_strerror (errno)); - error (_("Devctl failed.")); - } - else - { - if (sysinfo->type != - nto_map_arch_to_cputype - (gdbarch_bfd_arch_info - (current_inferior ()->arch ())->arch_name)) - error (_("Invalid target CPU.")); - } - } - } - - inf_child_target::open (arg, from_tty); - gdb_printf ("Debugging using %s\n", nto_procfs_path); -} - -static void -procfs_set_thread (ptid_t ptid) -{ - pid_t tid; - - tid = ptid.tid (); - devctl (ctl_fd, DCMD_PROC_CURTHREAD, &tid, sizeof (tid), 0); -} - -/* Return true if the thread TH is still alive. */ - -bool -nto_procfs_target::thread_alive (ptid_t ptid) -{ - pid_t tid; - pid_t pid; - procfs_status status; - int err; - - tid = ptid.tid (); - pid = ptid.pid (); - - if (kill (pid, 0) == -1) - return false; - - status.tid = tid; - if ((err = devctl (ctl_fd, DCMD_PROC_TIDSTATUS, - &status, sizeof (status), 0)) != EOK) - return false; - - /* Thread is alive or dead but not yet joined, - or dead and there is an alive (or dead unjoined) thread with - higher tid. - - If the tid is not the same as requested, requested tid is dead. */ - return (status.tid == tid) && (status.state != STATE_DEAD); -} - -static void -update_thread_private_data_name (struct thread_info *new_thread, - const char *newname) -{ - nto_thread_info *pti = get_nto_thread_info (new_thread); - - gdb_assert (newname != NULL); - gdb_assert (new_thread != NULL); - - if (pti) - { - pti = new nto_thread_info; - new_thread->priv.reset (pti); - } - - pti->name = newname; -} - -static void -update_thread_private_data (struct thread_info *new_thread, - pthread_t tid, int state, int flags) -{ - procfs_info pidinfo; - struct _thread_name *tn; - procfs_threadctl tctl; - -#if _NTO_VERSION > 630 - gdb_assert (new_thread != NULL); - - if (devctl (ctl_fd, DCMD_PROC_INFO, &pidinfo, - sizeof(pidinfo), 0) != EOK) - return; - - memset (&tctl, 0, sizeof (tctl)); - tctl.cmd = _NTO_TCTL_NAME; - tn = (struct _thread_name *) (&tctl.data); - - /* Fetch name for the given thread. */ - tctl.tid = tid; - tn->name_buf_len = sizeof (tctl.data) - sizeof (*tn); - tn->new_name_len = -1; /* Getting, not setting. */ - if (devctl (ctl_fd, DCMD_PROC_THREADCTL, &tctl, sizeof (tctl), NULL) != EOK) - tn->name_buf[0] = '\0'; - - tn->name_buf[_NTO_THREAD_NAME_MAX] = '\0'; - - update_thread_private_data_name (new_thread, tn->name_buf); - - nto_thread_info *pti = get_nto_thread_info (new_thread); - pti->tid = tid; - pti->state = state; - pti->flags = flags; -#endif /* _NTO_VERSION */ -} - -void -nto_procfs_target::update_thread_list () -{ - procfs_status status; - pid_t pid; - ptid_t ptid; - pthread_t tid; - struct thread_info *new_thread; - - if (ctl_fd == -1) - return; - - prune_threads (); - - pid = current_inferior ()->pid; - - status.tid = 1; - - for (tid = 1;; ++tid) - { - if (status.tid == tid - && (devctl (ctl_fd, DCMD_PROC_TIDSTATUS, &status, sizeof (status), 0) - != EOK)) - break; - if (status.tid != tid) - /* The reason why this would not be equal is that devctl might have - returned different tid, meaning the requested tid no longer exists - (e.g. thread exited). */ - continue; - ptid = ptid_t (pid, 0, tid); - new_thread = this->find_thread (ptid); - if (!new_thread) - new_thread = add_thread (ptid); - update_thread_private_data (new_thread, tid, status.state, 0); - status.tid++; - } - return; -} - -static void -procfs_pidlist (const char *args, int from_tty) -{ - struct dirent *dirp = NULL; - char buf[PATH_MAX]; - procfs_info *pidinfo = NULL; - procfs_debuginfo *info = NULL; - procfs_status *status = NULL; - pid_t num_threads = 0; - pid_t pid; - char name[512]; - char procfs_dir[PATH_MAX]; - - snprintf (procfs_dir, sizeof (procfs_dir), "%s%s", - (nodestr != NULL) ? nodestr : "", "/proc"); - - gdb_dir_up dp (opendir (procfs_dir)); - if (dp == NULL) - { - gdb_printf (gdb_stderr, "failed to opendir \"%s\" - %d (%s)", - procfs_dir, errno, safe_strerror (errno)); - return; - } - - /* Start scan at first pid. */ - rewinddir (dp.get ()); - - do - { - /* Get the right pid and procfs path for the pid. */ - do - { - dirp = readdir (dp.get ()); - if (dirp == NULL) - return; - snprintf (buf, sizeof (buf), "%s%s/%s/as", - (nodestr != NULL) ? nodestr : "", - "/proc", dirp->d_name); - pid = atoi (dirp->d_name); - } - while (pid == 0); - - /* Open the procfs path. */ - scoped_fd fd (open (buf, O_RDONLY)); - if (fd.get () == -1) - { - gdb_printf (gdb_stderr, "failed to open %s - %d (%s)\n", - buf, errno, safe_strerror (errno)); - continue; - } - - pidinfo = (procfs_info *) buf; - if (devctl (fd.get (), DCMD_PROC_INFO, pidinfo, sizeof (buf), 0) != EOK) - { - gdb_printf (gdb_stderr, - "devctl DCMD_PROC_INFO failed - %d (%s)\n", - errno, safe_strerror (errno)); - break; - } - num_threads = pidinfo->num_threads; - - info = (procfs_debuginfo *) buf; - if (devctl (fd.get (), DCMD_PROC_MAPDEBUG_BASE, info, sizeof (buf), 0) - != EOK) - strcpy (name, "unavailable"); - else - strcpy (name, info->path); - - /* Collect state info on all the threads. */ - status = (procfs_status *) buf; - for (status->tid = 1; status->tid <= num_threads; status->tid++) - { - const int err - = devctl (fd.get (), DCMD_PROC_TIDSTATUS, status, sizeof (buf), 0); - gdb_printf ("%s - %d", name, pid); - if (err == EOK && status->tid != 0) - gdb_printf ("/%d\n", status->tid); - else - { - gdb_printf ("\n"); - break; - } - } - } - while (dirp != NULL); -} - -static void -procfs_meminfo (const char *args, int from_tty) -{ - procfs_mapinfo *mapinfos = NULL; - static int num_mapinfos = 0; - procfs_mapinfo *mapinfo_p, *mapinfo_p2; - int flags = ~0, err, num, i, j; - - struct - { - procfs_debuginfo info; - char buff[_POSIX_PATH_MAX]; - } map; - - struct info - { - unsigned addr; - unsigned size; - unsigned flags; - unsigned debug_vaddr; - unsigned long long offset; - }; - - struct printinfo - { - unsigned long long ino; - unsigned dev; - struct info text; - struct info data; - char name[256]; - } printme; - - /* Get the number of map entrys. */ - err = devctl (ctl_fd, DCMD_PROC_MAPINFO, NULL, 0, &num); - if (err != EOK) - { - printf ("failed devctl num mapinfos - %d (%s)\n", err, - safe_strerror (err)); - return; - } - - mapinfos = XNEWVEC (procfs_mapinfo, num); - - num_mapinfos = num; - mapinfo_p = mapinfos; - - /* Fill the map entrys. */ - err = devctl (ctl_fd, DCMD_PROC_MAPINFO, mapinfo_p, num - * sizeof (procfs_mapinfo), &num); - if (err != EOK) - { - printf ("failed devctl mapinfos - %d (%s)\n", err, safe_strerror (err)); - xfree (mapinfos); - return; - } - - num = std::min (num, num_mapinfos); - - /* Run through the list of mapinfos, and store the data and text info - so we can print it at the bottom of the loop. */ - for (mapinfo_p = mapinfos, i = 0; i < num; i++, mapinfo_p++) - { - if (!(mapinfo_p->flags & flags)) - mapinfo_p->ino = 0; - - if (mapinfo_p->ino == 0) /* Already visited. */ - continue; - - map.info.vaddr = mapinfo_p->vaddr; - - err = devctl (ctl_fd, DCMD_PROC_MAPDEBUG, &map, sizeof (map), 0); - if (err != EOK) - continue; - - memset (&printme, 0, sizeof printme); - printme.dev = mapinfo_p->dev; - printme.ino = mapinfo_p->ino; - printme.text.addr = mapinfo_p->vaddr; - printme.text.size = mapinfo_p->size; - printme.text.flags = mapinfo_p->flags; - printme.text.offset = mapinfo_p->offset; - printme.text.debug_vaddr = map.info.vaddr; - strcpy (printme.name, map.info.path); - - /* Check for matching data. */ - for (mapinfo_p2 = mapinfos, j = 0; j < num; j++, mapinfo_p2++) - { - if (mapinfo_p2->vaddr != mapinfo_p->vaddr - && mapinfo_p2->ino == mapinfo_p->ino - && mapinfo_p2->dev == mapinfo_p->dev) - { - map.info.vaddr = mapinfo_p2->vaddr; - err = - devctl (ctl_fd, DCMD_PROC_MAPDEBUG, &map, sizeof (map), 0); - if (err != EOK) - continue; - - if (strcmp (map.info.path, printme.name)) - continue; - - /* Lower debug_vaddr is always text, if necessary, swap. */ - if ((int) map.info.vaddr < (int) printme.text.debug_vaddr) - { - memcpy (&(printme.data), &(printme.text), - sizeof (printme.data)); - printme.text.addr = mapinfo_p2->vaddr; - printme.text.size = mapinfo_p2->size; - printme.text.flags = mapinfo_p2->flags; - printme.text.offset = mapinfo_p2->offset; - printme.text.debug_vaddr = map.info.vaddr; - } - else - { - printme.data.addr = mapinfo_p2->vaddr; - printme.data.size = mapinfo_p2->size; - printme.data.flags = mapinfo_p2->flags; - printme.data.offset = mapinfo_p2->offset; - printme.data.debug_vaddr = map.info.vaddr; - } - mapinfo_p2->ino = 0; - } - } - mapinfo_p->ino = 0; - - gdb_printf ("%s\n", printme.name); - gdb_printf ("\ttext=%08x bytes @ 0x%08x\n", printme.text.size, - printme.text.addr); - gdb_printf ("\t\tflags=%08x\n", printme.text.flags); - gdb_printf ("\t\tdebug=%08x\n", printme.text.debug_vaddr); - gdb_printf ("\t\toffset=%s\n", phex (printme.text.offset, 8)); - if (printme.data.size) - { - gdb_printf ("\tdata=%08x bytes @ 0x%08x\n", printme.data.size, - printme.data.addr); - gdb_printf ("\t\tflags=%08x\n", printme.data.flags); - gdb_printf ("\t\tdebug=%08x\n", printme.data.debug_vaddr); - gdb_printf ("\t\toffset=%s\n", phex (printme.data.offset, 8)); - } - gdb_printf ("\tdev=0x%x\n", printme.dev); - gdb_printf ("\tino=0x%x\n", (unsigned int) printme.ino); - } - xfree (mapinfos); - return; -} - -/* Print status information about what we're accessing. */ -void -nto_procfs_target::files_info () -{ - struct inferior *inf = current_inferior (); - - gdb_printf ("\tUsing the running image of %s %s via %s.\n", - inf->attach_flag ? "attached" : "child", - target_pid_to_str (ptid_t (inf->pid)).c_str (), - (nodestr != NULL) ? nodestr : "local node"); -} - -/* Target to_pid_to_exec_file implementation. */ - -const char * -nto_procfs_target::pid_to_exec_file (const int pid) -{ - int proc_fd; - static char proc_path[PATH_MAX]; - ssize_t rd; - - /* Read exe file name. */ - snprintf (proc_path, sizeof (proc_path), "%s/proc/%d/exefile", - (nodestr != NULL) ? nodestr : "", pid); - proc_fd = open (proc_path, O_RDONLY); - if (proc_fd == -1) - return NULL; - - rd = read (proc_fd, proc_path, sizeof (proc_path) - 1); - close (proc_fd); - if (rd <= 0) - { - proc_path[0] = '\0'; - return NULL; - } - proc_path[rd] = '\0'; - return proc_path; -} - -/* Attach to process PID, then initialize for debugging it. */ -void -nto_procfs_target::attach (const char *args, int from_tty) -{ - int pid; - struct inferior *inf; - - pid = parse_pid_to_attach (args); - - if (pid == getpid ()) - error (_("Attaching GDB to itself is not a good idea...")); - - target_announce_attach (from_tty, pid); - - ptid_t ptid = do_attach (ptid_t (pid)); - inf = current_inferior (); - inferior_appeared (inf, pid); - inf->attach_flag = true; - - if (!inf->target_is_pushed (ops)) - inf->push_target (ops); - - update_thread_list (); - - switch_to_thread (this->find_thread (ptid)); -} - -void -nto_procfs_target::post_attach (pid_t pid) -{ - if (current_program_space->exec_bfd ()) - solib_create_inferior_hook (0); -} - -static ptid_t -do_attach (ptid_t ptid) -{ - procfs_status status; - struct sigevent event; - char path[PATH_MAX]; - - snprintf (path, PATH_MAX - 1, "%s%s/%d/as", - (nodestr != NULL) ? nodestr : "", "/proc", ptid.pid ()); - ctl_fd = open (path, O_RDWR); - if (ctl_fd == -1) - error (_("Couldn't open proc file %s, error %d (%s)"), path, errno, - safe_strerror (errno)); - if (devctl (ctl_fd, DCMD_PROC_STOP, &status, sizeof (status), 0) != EOK) - error (_("Couldn't stop process")); - - /* Define a sigevent for process stopped notification. */ - event.sigev_notify = SIGEV_SIGNAL_THREAD; - event.sigev_signo = SIGUSR1; - event.sigev_code = 0; - event.sigev_value.sival_ptr = NULL; - event.sigev_priority = -1; - devctl (ctl_fd, DCMD_PROC_EVENT, &event, sizeof (event), 0); - - if (devctl (ctl_fd, DCMD_PROC_STATUS, &status, sizeof (status), 0) == EOK - && status.flags & _DEBUG_FLAG_STOPPED) - SignalKill (nto_node (), ptid.pid (), 0, SIGCONT, 0, 0); - nto_init_solib_absolute_prefix (); - return ptid_t (ptid.pid (), 0, status.tid); -} - -/* Ask the user what to do when an interrupt is received. */ -static void -interrupt_query (void) -{ - if (query (_("Interrupted while waiting for the program.\n\ -Give up (and stop debugging it)? "))) - { - target_mourn_inferior (inferior_ptid); - quit (); - } -} - -/* The user typed ^C twice. */ -static void -nto_handle_sigint_twice (int signo) -{ - signal (signo, ofunc); - interrupt_query (); - signal (signo, nto_handle_sigint_twice); -} - -static void -nto_handle_sigint (int signo) -{ - /* If this doesn't work, try more severe steps. */ - signal (signo, nto_handle_sigint_twice); - - target_interrupt (); -} - -sptid_t -nto_procfs_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus, - target_wait_flags options) -{ - sigset_t set; - siginfo_t info; - procfs_status status; - static int exit_signo = 0; /* To track signals that cause termination. */ - - ourstatus->set_spurious (); - - if (inferior_ptid == null_ptid) - { - ourstatus->set_stopped (GDB_SIGNAL_0); - exit_signo = 0; - return null_ptid; - } - - sigemptyset (&set); - sigaddset (&set, SIGUSR1); - - devctl (ctl_fd, DCMD_PROC_STATUS, &status, sizeof (status), 0); - while (!(status.flags & _DEBUG_FLAG_ISTOP)) - { - ofunc = signal (SIGINT, nto_handle_sigint); - sigwaitinfo (&set, &info); - signal (SIGINT, ofunc); - devctl (ctl_fd, DCMD_PROC_STATUS, &status, sizeof (status), 0); - } - - nto_inferior_data (NULL)->stopped_flags = status.flags; - nto_inferior_data (NULL)->stopped_pc = status.ip; - - if (status.flags & _DEBUG_FLAG_SSTEP) - ourstatus->set_stopped (GDB_SIGNAL_TRAP); - /* Was it a breakpoint? */ - else if (status.flags & _DEBUG_FLAG_TRACE) - ourstatus->set_stopped (GDB_SIGNAL_TRAP); - else if (status.flags & _DEBUG_FLAG_ISTOP) - { - switch (status.why) - { - case _DEBUG_WHY_SIGNALLED: - ourstatus->set_stopped (gdb_signal_from_host (status.info.si_signo)); - exit_signo = 0; - break; - case _DEBUG_WHY_FAULTED: - if (status.info.si_signo == SIGTRAP) - { - ourstatus->set_stopped (0); - exit_signo = 0; - } - else - { - ourstatus->set_stopped - (gdb_signal_from_host (status.info.si_signo)); - exit_signo = ourstatus->sig (); - } - break; - - case _DEBUG_WHY_TERMINATED: - { - int waitval = 0; - - waitpid (inferior_ptid.pid (), &waitval, WNOHANG); - if (exit_signo) - { - /* Abnormal death. */ - ourstatus->set_signalled (exit_signo); - } - else - { - /* Normal death. */ - ourstatus->set_exited (WEXITSTATUS (waitval)); - } - exit_signo = 0; - break; - } - - case _DEBUG_WHY_REQUESTED: - /* We are assuming a requested stop is due to a SIGINT. */ - ourstatus->set_stopped (GDB_SIGNAL_INT); - exit_signo = 0; - break; - } - } - - return ptid_t (status.pid, 0, status.tid); -} - -/* Read the current values of the inferior's registers, both the - general register set and floating point registers (if supported) - and update gdb's idea of their current values. */ -void -nto_procfs_target::fetch_registers (struct regcache *regcache, int regno) -{ - union - { - procfs_greg greg; - procfs_fpreg fpreg; - procfs_altreg altreg; - } - reg; - int regsize; - - procfs_set_thread (regcache->ptid ()); - if (devctl (ctl_fd, DCMD_PROC_GETGREG, ®, sizeof (reg), ®size) == EOK) - nto_supply_gregset (regcache, (char *) ®.greg); - if (devctl (ctl_fd, DCMD_PROC_GETFPREG, ®, sizeof (reg), ®size) - == EOK) - nto_supply_fpregset (regcache, (char *) ®.fpreg); - if (devctl (ctl_fd, DCMD_PROC_GETALTREG, ®, sizeof (reg), ®size) - == EOK) - nto_supply_altregset (regcache, (char *) ®.altreg); -} - -/* Helper for procfs_xfer_partial that handles memory transfers. - Arguments are like target_xfer_partial. */ - -static enum target_xfer_status -procfs_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf, - ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) -{ - int nbytes; - - if (lseek (ctl_fd, (off_t) memaddr, SEEK_SET) != (off_t) memaddr) - return TARGET_XFER_E_IO; - - if (writebuf != NULL) - nbytes = write (ctl_fd, writebuf, len); - else - nbytes = read (ctl_fd, readbuf, len); - if (nbytes <= 0) - return TARGET_XFER_E_IO; - *xfered_len = nbytes; - return TARGET_XFER_OK; -} - -/* Target to_xfer_partial implementation. */ - -enum target_xfer_status -nto_procfs_target::xfer_partial (enum target_object object, - const char *annex, gdb_byte *readbuf, - const gdb_byte *writebuf, ULONGEST offset, - ULONGEST len, ULONGEST *xfered_len) -{ - switch (object) - { - case TARGET_OBJECT_MEMORY: - return procfs_xfer_memory (readbuf, writebuf, offset, len, xfered_len); - case TARGET_OBJECT_AUXV: - if (readbuf != NULL) - { - int err; - CORE_ADDR initial_stack; - debug_process_t procinfo; - /* For 32-bit architecture, size of auxv_t is 8 bytes. */ - const unsigned int sizeof_auxv_t = sizeof (auxv_t); - const unsigned int sizeof_tempbuf = 20 * sizeof_auxv_t; - int tempread; - gdb_byte *const tempbuf = alloca (sizeof_tempbuf); - - if (tempbuf == NULL) - return TARGET_XFER_E_IO; - - err = devctl (ctl_fd, DCMD_PROC_INFO, &procinfo, - sizeof procinfo, 0); - if (err != EOK) - return TARGET_XFER_E_IO; - - initial_stack = procinfo.initial_stack; - - /* procfs is always 'self-hosted', no byte-order manipulation. */ - tempread = nto_read_auxv_from_initial_stack (initial_stack, tempbuf, - sizeof_tempbuf, - sizeof (auxv_t)); - tempread = std::min (tempread, len) - offset; - memcpy (readbuf, tempbuf + offset, tempread); - *xfered_len = tempread; - return tempread ? TARGET_XFER_OK : TARGET_XFER_EOF; - } - /* Fallthru */ - default: - return this->beneath ()->xfer_partial (object, annex, - readbuf, writebuf, offset, len, - xfered_len); - } -} - -/* Take a program previously attached to and detaches it. - The program resumes execution and will no longer stop - on signals, etc. We'd better not have left any breakpoints - in the program or it'll die when it hits one. */ -void -nto_procfs_target::detach (inferior *inf, int from_tty) -{ - target_announce_detach (); - - if (siggnal) - SignalKill (nto_node (), inf->pid, 0, 0, 0, 0); - - close (ctl_fd); - ctl_fd = -1; - - switch_to_no_thread (); - detach_inferior (inf->pid); - init_thread_list (); - inf_child_maybe_unpush_target (ops); -} - -static int -procfs_breakpoint (CORE_ADDR addr, int type, int size) -{ - procfs_break brk; - - brk.type = type; - brk.addr = addr; - brk.size = size; - errno = devctl (ctl_fd, DCMD_PROC_BREAK, &brk, sizeof (brk), 0); - if (errno != EOK) - return 1; - return 0; -} - -int -nto_procfs_target::insert_breakpoint (struct gdbarch *gdbarch, - struct bp_target_info *bp_tgt) -{ - bp_tgt->placed_address = bp_tgt->reqstd_address; - return procfs_breakpoint (bp_tgt->placed_address, _DEBUG_BREAK_EXEC, 0); -} - -int -nto_procfs_target::remove_breakpoint (struct gdbarch *gdbarch, - struct bp_target_info *bp_tgt, - enum remove_bp_reason reason) -{ - return procfs_breakpoint (bp_tgt->placed_address, _DEBUG_BREAK_EXEC, -1); -} - -int -nto_procfs_target::insert_hw_breakpoint (struct gdbarch *gdbarch, - struct bp_target_info *bp_tgt) -{ - bp_tgt->placed_address = bp_tgt->reqstd_address; - return procfs_breakpoint (bp_tgt->placed_address, - _DEBUG_BREAK_EXEC | _DEBUG_BREAK_HW, 0); -} - -int -nto_procfs_target::remove_hw_breakpoint (struct gdbarch *gdbarch, - struct bp_target_info *bp_tgt) -{ - return procfs_breakpoint (bp_tgt->placed_address, - _DEBUG_BREAK_EXEC | _DEBUG_BREAK_HW, -1); -} - -void -nto_procfs_target::resume (ptid_t ptid, int step, enum gdb_signal signo) -{ - int signal_to_pass; - procfs_status status; - sigset_t *run_fault = (sigset_t *) (void *) &run.fault; - - if (inferior_ptid == null_ptid) - return; - - procfs_set_thread (ptid == minus_one_ptid ? inferior_ptid : - ptid); - - run.flags = _DEBUG_RUN_FAULT | _DEBUG_RUN_TRACE; - if (step) - run.flags |= _DEBUG_RUN_STEP; - - sigemptyset (run_fault); - sigaddset (run_fault, FLTBPT); - sigaddset (run_fault, FLTTRACE); - sigaddset (run_fault, FLTILL); - sigaddset (run_fault, FLTPRIV); - sigaddset (run_fault, FLTBOUNDS); - sigaddset (run_fault, FLTIOVF); - sigaddset (run_fault, FLTIZDIV); - sigaddset (run_fault, FLTFPE); - /* Peter V will be changing this at some point. */ - sigaddset (run_fault, FLTPAGE); - - run.flags |= _DEBUG_RUN_ARM; - - signal_to_pass = gdb_signal_to_host (signo); - - if (signal_to_pass) - { - devctl (ctl_fd, DCMD_PROC_STATUS, &status, sizeof (status), 0); - signal_to_pass = gdb_signal_to_host (signo); - if (status.why & (_DEBUG_WHY_SIGNALLED | _DEBUG_WHY_FAULTED)) - { - if (signal_to_pass != status.info.si_signo) - { - SignalKill (nto_node (), inferior_ptid.pid (), 0, - signal_to_pass, 0, 0); - run.flags |= _DEBUG_RUN_CLRFLT | _DEBUG_RUN_CLRSIG; - } - else /* Let it kill the program without telling us. */ - sigdelset (&run.trace, signal_to_pass); - } - } - else - run.flags |= _DEBUG_RUN_CLRSIG | _DEBUG_RUN_CLRFLT; - - errno = devctl (ctl_fd, DCMD_PROC_RUN, &run, sizeof (run), 0); - if (errno != EOK) - { - perror (_("run error!\n")); - return; - } -} - -void -nto_procfs_target::mourn_inferior () -{ - if (inferior_ptid != null_ptid) - { - SignalKill (nto_node (), inferior_ptid.pid (), 0, SIGKILL, 0, 0); - close (ctl_fd); - } - switch_to_no_thread (); - init_thread_list (); - inf_child_mourn_inferior (ops); -} - -/* This function breaks up an argument string into an argument - vector suitable for passing to execvp(). - E.g., on "run a b c d" this routine would get as input - the string "a b c d", and as output it would fill in argv with - the four arguments "a", "b", "c", "d". The only additional - functionality is simple quoting. The gdb command: - run a "b c d" f - will fill in argv with the three args "a", "b c d", "e". */ -static void -breakup_args (char *scratch, char **argv) -{ - char *pp, *cp = scratch; - char quoting = 0; - - for (;;) - { - /* Scan past leading separators. */ - quoting = 0; - while (*cp == ' ' || *cp == '\t' || *cp == '\n') - cp++; - - /* Break if at end of string. */ - if (*cp == '\0') - break; - - /* Take an arg. */ - if (*cp == '"') - { - cp++; - quoting = strchr (cp, '"') ? 1 : 0; - } - - *argv++ = cp; - - /* Scan for next arg separator. */ - pp = cp; - if (quoting) - cp = strchr (pp, '"'); - if ((cp == NULL) || (!quoting)) - cp = strchr (pp, ' '); - if (cp == NULL) - cp = strchr (pp, '\t'); - if (cp == NULL) - cp = strchr (pp, '\n'); - - /* No separators => end of string => break. */ - if (cp == NULL) - { - pp = cp; - break; - } - - /* Replace the separator with a terminator. */ - *cp++ = '\0'; - } - - /* Execv requires a null-terminated arg vector. */ - *argv = NULL; -} - -void -nto_procfs_target::create_inferior (const char *exec_file, - const std::string &allargs, - char **env, int from_tty) -{ - if (exec_file == nullptr) - no_executable_specified_error (); - - struct inheritance inherit; - pid_t pid; - int flags, errn; - char **argv, *args; - const char *in = "", *out = "", *err = ""; - int fd, fds[3]; - sigset_t set; - struct inferior *inf; - - argv = xmalloc ((allargs.size () / (unsigned) 2 + 2) * - sizeof (*argv)); - argv[0] = exec_file; - args = xstrdup (allargs.c_str ()); - breakup_args (args, &argv[1]); - - argv = nto_parse_redirection (argv, &in, &out, &err); - - fds[0] = STDIN_FILENO; - fds[1] = STDOUT_FILENO; - fds[2] = STDERR_FILENO; - - /* If the user specified I/O via gdb's --tty= arg, use it, but only - if the i/o is not also being specified via redirection. */ - const char *inferior_tty = current_inferior ()->tty (); - if (inferior_tty != nullptr) - { - if (!in[0]) - in = inferior_tty; - if (!out[0]) - out = inferior_tty; - if (!err[0]) - err = inferior_tty; - } - - if (in[0]) - { - fd = open (in, O_RDONLY); - if (fd == -1) - perror (in); - else - fds[0] = fd; - } - if (out[0]) - { - fd = open (out, O_WRONLY); - if (fd == -1) - perror (out); - else - fds[1] = fd; - } - if (err[0]) - { - fd = open (err, O_WRONLY); - if (fd == -1) - perror (err); - else - fds[2] = fd; - } - - /* Clear any pending SIGUSR1's but keep the behavior the same. */ - signal (SIGUSR1, signal (SIGUSR1, SIG_IGN)); - - sigemptyset (&set); - sigaddset (&set, SIGUSR1); - sigprocmask (SIG_UNBLOCK, &set, NULL); - - memset (&inherit, 0, sizeof (inherit)); - - if (ND_NODE_CMP (nto_procfs_node, ND_LOCAL_NODE) != 0) - { - inherit.nd = nto_node (); - inherit.flags |= SPAWN_SETND; - inherit.flags &= ~SPAWN_EXEC; - } - inherit.flags |= SPAWN_SETGROUP | SPAWN_HOLD; - inherit.pgroup = SPAWN_NEWPGROUP; - pid = spawnp (argv[0], 3, fds, &inherit, argv, - ND_NODE_CMP (nto_procfs_node, ND_LOCAL_NODE) == 0 ? env : 0); - xfree (args); - - sigprocmask (SIG_BLOCK, &set, NULL); - - if (pid == -1) - error (_("Error spawning %s: %d (%s)"), argv[0], errno, - safe_strerror (errno)); - - if (fds[0] != STDIN_FILENO) - close (fds[0]); - if (fds[1] != STDOUT_FILENO) - close (fds[1]); - if (fds[2] != STDERR_FILENO) - close (fds[2]); - - ptid_t ptid = do_attach (ptid_t (pid)); - update_thread_list (); - switch_to_thread (this->find_thread (ptid)); - - inf = current_inferior (); - inferior_appeared (inf, pid); - inf->attach_flag = false; - - flags = _DEBUG_FLAG_KLC; /* Kill-on-Last-Close flag. */ - errn = devctl (ctl_fd, DCMD_PROC_SET_FLAG, &flags, sizeof (flags), 0); - if (errn != EOK) - { - /* FIXME: expected warning? */ - /* warning( "Failed to set Kill-on-Last-Close flag: errno = %d(%s)\n", - errn, safe_strerror(errn) ); */ - } - if (!inf->target_is_pushed (ops)) - inf->push_target (ops); - target_terminal::init (); - - if (current_program_space->exec_bfd () != NULL - || (current_program_space->symfile_object_file != NULL - && current_program_space->symfile_object_file->obfd != NULL)) - solib_create_inferior_hook (0); -} - -void -nto_procfs_target::interrupt () -{ - devctl (ctl_fd, DCMD_PROC_STOP, NULL, 0, 0); -} - -void -nto_procfs_target::kill () -{ - target_mourn_inferior (inferior_ptid); -} - -/* Fill buf with regset and return devctl cmd to do the setting. Return - -1 if we fail to get the regset. Store size of regset in regsize. */ -static int -get_regset (int regset, char *buf, int bufsize, int *regsize) -{ - int dev_get, dev_set; - switch (regset) - { - case NTO_REG_GENERAL: - dev_get = DCMD_PROC_GETGREG; - dev_set = DCMD_PROC_SETGREG; - break; - - case NTO_REG_FLOAT: - dev_get = DCMD_PROC_GETFPREG; - dev_set = DCMD_PROC_SETFPREG; - break; - - case NTO_REG_ALT: - dev_get = DCMD_PROC_GETALTREG; - dev_set = DCMD_PROC_SETALTREG; - break; - - case NTO_REG_SYSTEM: - default: - return -1; - } - if (devctl (ctl_fd, dev_get, buf, bufsize, regsize) != EOK) - return -1; - - return dev_set; -} - -void -nto_procfs_target::store_registers (struct regcache *regcache, int regno) -{ - union - { - procfs_greg greg; - procfs_fpreg fpreg; - procfs_altreg altreg; - } - reg; - unsigned off; - int len, regset, regsize, dev_set, err; - char *data; - ptid_t ptid = regcache->ptid (); - - if (ptid == null_ptid) - return; - procfs_set_thread (ptid); - - if (regno == -1) - { - for (regset = NTO_REG_GENERAL; regset < NTO_REG_END; regset++) - { - dev_set = get_regset (regset, (char *) ®, - sizeof (reg), ®size); - if (dev_set == -1) - continue; - - if (nto_regset_fill (regcache, regset, (char *) ®) == -1) - continue; - - err = devctl (ctl_fd, dev_set, ®, regsize, 0); - if (err != EOK) - gdb_printf (gdb_stderr, - "Warning unable to write regset %d: %s\n", - regno, safe_strerror (err)); - } - } - else - { - regset = nto_regset_id (regno); - if (regset == -1) - return; - - dev_set = get_regset (regset, (char *) ®, sizeof (reg), ®size); - if (dev_set == -1) - return; - - len = nto_register_area (regcache->arch (), - regno, regset, &off); - - if (len < 1) - return; - - regcache->raw_collect (regno, (char *) ® + off); - - err = devctl (ctl_fd, dev_set, ®, regsize, 0); - if (err != EOK) - gdb_printf (gdb_stderr, - "Warning unable to write regset %d: %s\n", regno, - safe_strerror (err)); - } -} - -/* Set list of signals to be handled in the target. */ - -void -nto_procfs_target::pass_signals - (gdb::array_view<const unsigned char> pass_signals) -{ - int signo; - - sigfillset (&run.trace); - - for (signo = 1; signo < NSIG; signo++) - { - int target_signo = gdb_signal_from_host (signo); - if (target_signo < pass_signals.size () && pass_signals[target_signo]) - sigdelset (&run.trace, signo); - } -} - -std::string -nto_procfs_target::pid_to_str (ptid_t ptid) -{ - int pid, tid; - struct tidinfo *tip; - - pid = ptid.pid (); - tid = ptid.tid (); - -#if 0 /* NYI */ - tip = procfs_thread_info (pid, tid); - if (tip != NULL) - snprintf (&buf[n], 1023, " (state = 0x%02x)", tip->state); -#endif - - return string_printf ("process %d", pid); -} - -/* to_can_run implementation for "target procfs". Note this really - means "can this target be the default run target", which there can - be only one, and we make it be "target native" like other ports. - "target procfs <node>" wouldn't make sense as default run target, as - it needs <node>. */ - -int -nto_procfs_target::can_run () -{ - return 0; -} - -/* "target procfs". */ -static nto_procfs_target_procfs nto_procfs_ops; - -/* "target native". */ -static nto_procfs_target_native nto_native_ops; - -/* Create the "native" and "procfs" targets. */ - -static void -init_procfs_targets (void) -{ - /* Register "target native". This is the default run target. */ - add_target (nto_native_target_info, inf_child_open_target); - set_native_target (&nto_native_ops); - - /* Register "target procfs <node>". */ - add_target (nto_procfs_target_info, inf_child_open_target); -} - -#define OSTYPE_NTO 1 - -void _initialize_procfs (); -void -_initialize_procfs () -{ - sigset_t set; - - init_procfs_targets (); - - /* We use SIGUSR1 to gain control after we block waiting for a process. - We use sigwaitevent to wait. */ - sigemptyset (&set); - sigaddset (&set, SIGUSR1); - sigprocmask (SIG_BLOCK, &set, NULL); - - /* Initially, make sure all signals are reported. */ - sigfillset (&run.trace); - - /* Stuff some information. */ - nto_cpuinfo_flags = SYSPAGE_ENTRY (cpuinfo)->flags; - nto_cpuinfo_valid = 1; - - add_info ("pidlist", procfs_pidlist, _("pidlist")); - add_info ("meminfo", procfs_meminfo, _("memory information")); - - nto_is_nto_target = procfs_is_nto_target; -} - - -static int -procfs_hw_watchpoint (int addr, int len, enum target_hw_bp_type type) -{ - procfs_break brk; - - switch (type) - { - case hw_read: - brk.type = _DEBUG_BREAK_RD; - break; - case hw_access: - brk.type = _DEBUG_BREAK_RW; - break; - default: /* Modify. */ -/* FIXME: brk.type = _DEBUG_BREAK_RWM gives EINVAL for some reason. */ - brk.type = _DEBUG_BREAK_RW; - } - brk.type |= _DEBUG_BREAK_HW; /* Always ask for HW. */ - brk.addr = addr; - brk.size = len; - - errno = devctl (ctl_fd, DCMD_PROC_BREAK, &brk, sizeof (brk), 0); - if (errno != EOK) - { - perror (_("Failed to set hardware watchpoint")); - return -1; - } - return 0; -} - -bool -nto_procfs_target::can_use_hw_breakpoint (enum bptype type, - int cnt, int othertype) -{ - return 1; -} - -int -nto_procfs_target::remove_hw_watchpoint (CORE_ADDR addr, int len, - enum target_hw_bp_type type, - struct expression *cond) -{ - return procfs_hw_watchpoint (addr, -1, type); -} - -int -nto_procfs_target::insert_hw_watchpoint (CORE_ADDR addr, int len, - enum target_hw_bp_type type, - struct expression *cond) -{ - return procfs_hw_watchpoint (addr, len, type); -} - -bool -nto_procfs_target::stopped_by_watchpoint () -{ - /* NOTE: nto_stopped_by_watchpoint will be called ONLY while we are - stopped due to a SIGTRAP. This assumes gdb works in 'all-stop' mode; - future gdb versions will likely run in 'non-stop' mode in which case - we will have to store/examine statuses per thread in question. - Until then, this will work fine. */ - - struct inferior *inf = current_inferior (); - struct nto_inferior_data *inf_data; - - gdb_assert (inf != NULL); - - inf_data = nto_inferior_data (inf); - - return inf_data->stopped_flags - & (_DEBUG_FLAG_TRACE_RD - | _DEBUG_FLAG_TRACE_WR - | _DEBUG_FLAG_TRACE_MODIFY); -} |