/* Machine independent support for SVR4 /proc (process file system) for GDB.
- Copyright (C) 1991 Free Software Foundation, Inc.
+ Copyright 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
Written by Fred Fish at Cygnus Support.
This file is part of GDB.
*/
-#include <stdio.h>
-
#include "defs.h"
-#ifdef USE_PROC_FS /* Entire file goes away if not using /proc */
-
-#include <stdio.h>
+#include <sys/types.h>
+#include <time.h>
+#include <sys/fault.h>
+#include <sys/syscall.h>
#include <sys/procfs.h>
#include <fcntl.h>
#include <errno.h>
+#include <string.h>
+#include <stropts.h>
+#include <poll.h>
+#include <unistd.h>
+#include <sys/stat.h>
#include "inferior.h"
#include "target.h"
+#include "command.h"
+#include "gdbcore.h"
+#include "thread.h"
+
+#define MAX_SYSCALLS 256 /* Maximum number of syscalls for table */
#ifndef PROC_NAME_FMT
-#define PROC_NAME_FMT "/proc/%d"
+#define PROC_NAME_FMT "/proc/%05d"
#endif
+extern struct target_ops procfs_ops; /* Forward declaration */
+
#if 1 /* FIXME: Gross and ugly hack to resolve coredep.c global */
CORE_ADDR kernel_u_addr;
#endif
+#ifdef BROKEN_SIGINFO_H /* Workaround broken SGS <sys/siginfo.h> */
+#undef si_pid
+#define si_pid _data._proc.pid
+#undef si_uid
+#define si_uid _data._proc._pdata._kill.uid
+#endif /* BROKEN_SIGINFO_H */
+
/* All access to the inferior, either one started by gdb or one that has
been attached to, is controlled by an instance of a procinfo structure,
defined below. Since gdb currently only handles one inferior at a time,
the inferior's procinfo information. */
struct procinfo {
- int valid; /* Nonzero if pid, fd, & pathname are valid */
+ struct procinfo *next;
int pid; /* Process ID of inferior */
int fd; /* File descriptor for /proc entry */
char *pathname; /* Pathname to /proc entry */
+ int had_event; /* poll/select says something happened */
int was_stopped; /* Nonzero if was stopped prior to attach */
+ int nopass_next_sigstop; /* Don't pass a sigstop on next resume */
prrun_t prrun; /* Control state when it is run */
prstatus_t prstatus; /* Current process status info */
gregset_t gregset; /* General register set */
sigset_t trace; /* Current traced signal set */
sysset_t exitset; /* Current traced system call exit set */
sysset_t entryset; /* Current traced system call entry set */
+ fltset_t saved_fltset; /* Saved traced hardware fault set */
+ sigset_t saved_trace; /* Saved traced signal set */
+ sigset_t saved_sighold; /* Saved held signal set */
+ sysset_t saved_exitset; /* Saved traced system call exit set */
+ sysset_t saved_entryset; /* Saved traced system call entry set */
};
-static struct procinfo pi; /* Inferior's process information */
+/* List of inferior process information */
+static struct procinfo *procinfo_list = NULL;
-/* Prototypes for local functions */
+static struct pollfd *poll_list; /* pollfds used for waiting on /proc */
-static int
-proc_address_to_fd PARAMS ((CORE_ADDR, int));
+static int num_poll_list = 0; /* Number of entries in poll_list */
-static int
-open_proc_file PARAMS ((int, struct procinfo *));
+static int last_resume_pid = -1; /* Last pid used with procfs_resume */
-static void
-close_proc_file PARAMS ((struct procinfo *));
+/* Much of the information used in the /proc interface, particularly for
+ printing status information, is kept as tables of structures of the
+ following form. These tables can be used to map numeric values to
+ their symbolic names and to a string that describes their specific use. */
-static void
-unconditionally_kill_inferior PARAMS ((void));
+struct trans {
+ int value; /* The numeric value */
+ char *name; /* The equivalent symbolic value */
+ char *desc; /* Short description of value */
+};
-static void
-proc_init_failed PARAMS ((char *));
+/* Translate bits in the pr_flags member of the prstatus structure, into the
+ names and desc information. */
-static void
-proc_info PARAMS ((char *, int));
+static struct trans pr_flag_table[] =
+{
+#if defined (PR_STOPPED)
+ { PR_STOPPED, "PR_STOPPED", "Process is stopped" },
+#endif
+#if defined (PR_ISTOP)
+ { PR_ISTOP, "PR_ISTOP", "Stopped on an event of interest" },
+#endif
+#if defined (PR_DSTOP)
+ { PR_DSTOP, "PR_DSTOP", "A stop directive is in effect" },
+#endif
+#if defined (PR_ASLEEP)
+ { PR_ASLEEP, "PR_ASLEEP", "Sleeping in an interruptible system call" },
+#endif
+#if defined (PR_FORK)
+ { PR_FORK, "PR_FORK", "Inherit-on-fork is in effect" },
+#endif
+#if defined (PR_RLC)
+ { PR_RLC, "PR_RLC", "Run-on-last-close is in effect" },
+#endif
+#if defined (PR_PTRACE)
+ { PR_PTRACE, "PR_PTRACE", "Process is being controlled by ptrace" },
+#endif
+#if defined (PR_PCINVAL)
+ { PR_PCINVAL, "PR_PCINVAL", "PC refers to an invalid virtual address" },
+#endif
+#if defined (PR_ISSYS)
+ { PR_ISSYS, "PR_ISSYS", "Is a system process" },
+#endif
+#if defined (PR_STEP)
+ { PR_STEP, "PR_STEP", "Process has single step pending" },
+#endif
+#if defined (PR_KLC)
+ { PR_KLC, "PR_KLC", "Kill-on-last-close is in effect" },
+#endif
+#if defined (PR_ASYNC)
+ { PR_ASYNC, "PR_ASYNC", "Asynchronous stop is in effect" },
+#endif
+#if defined (PR_PCOMPAT)
+ { PR_PCOMPAT, "PR_PCOMPAT", "Ptrace compatibility mode in effect" },
+#endif
+ { 0, NULL, NULL }
+};
-static void
-proc_info_address_map PARAMS ((struct procinfo *, int));
+/* Translate values in the pr_why field of the prstatus struct. */
-static char *
-mappingflags PARAMS ((long));
+static struct trans pr_why_table[] =
+{
+#if defined (PR_REQUESTED)
+ { PR_REQUESTED, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP" },
+#endif
+#if defined (PR_SIGNALLED)
+ { PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal" },
+#endif
+#if defined (PR_FAULTED)
+ { PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault" },
+#endif
+#if defined (PR_SYSENTRY)
+ { PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call" },
+#endif
+#if defined (PR_SYSEXIT)
+ { PR_SYSEXIT, "PR_SYSEXIT", "Exit from a traced system call" },
+#endif
+#if defined (PR_JOBCONTROL)
+ { PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action" },
+#endif
+#if defined (PR_SUSPENDED)
+ { PR_SUSPENDED, "PR_SUSPENDED", "Process suspended" },
+#endif
+ { 0, NULL, NULL }
+};
-/* External function prototypes that can't be easily included in any
- header file because the args are typedefs in system include files. */
+/* Hardware fault translation table. */
-extern void
-supply_gregset PARAMS ((gregset_t *));
+static struct trans faults_table[] =
+{
+#if defined (FLTILL)
+ { FLTILL, "FLTILL", "Illegal instruction" },
+#endif
+#if defined (FLTPRIV)
+ { FLTPRIV, "FLTPRIV", "Privileged instruction" },
+#endif
+#if defined (FLTBPT)
+ { FLTBPT, "FLTBPT", "Breakpoint trap" },
+#endif
+#if defined (FLTTRACE)
+ { FLTTRACE, "FLTTRACE", "Trace trap" },
+#endif
+#if defined (FLTACCESS)
+ { FLTACCESS, "FLTACCESS", "Memory access fault" },
+#endif
+#if defined (FLTBOUNDS)
+ { FLTBOUNDS, "FLTBOUNDS", "Memory bounds violation" },
+#endif
+#if defined (FLTIOVF)
+ { FLTIOVF, "FLTIOVF", "Integer overflow" },
+#endif
+#if defined (FLTIZDIV)
+ { FLTIZDIV, "FLTIZDIV", "Integer zero divide" },
+#endif
+#if defined (FLTFPE)
+ { FLTFPE, "FLTFPE", "Floating-point exception" },
+#endif
+#if defined (FLTSTACK)
+ { FLTSTACK, "FLTSTACK", "Unrecoverable stack fault" },
+#endif
+#if defined (FLTPAGE)
+ { FLTPAGE, "FLTPAGE", "Recoverable page fault" },
+#endif
+ { 0, NULL, NULL }
+};
-extern void
-fill_gregset PARAMS ((gregset_t *, int));
+/* Translation table for signal generation information. See UNIX System
+ V Release 4 Programmer's Reference Manual, siginfo(5). */
-extern void
-supply_fpregset PARAMS ((fpregset_t *));
+static struct sigcode {
+ int signo;
+ int code;
+ char *codename;
+ char *desc;
+} siginfo_table[] = {
+#if defined (SIGILL) && defined (ILL_ILLOPC)
+ { SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode" },
+#endif
+#if defined (SIGILL) && defined (ILL_ILLOPN)
+ { SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand", },
+#endif
+#if defined (SIGILL) && defined (ILL_ILLADR)
+ { SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode" },
+#endif
+#if defined (SIGILL) && defined (ILL_ILLTRP)
+ { SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap" },
+#endif
+#if defined (SIGILL) && defined (ILL_PRVOPC)
+ { SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode" },
+#endif
+#if defined (SIGILL) && defined (ILL_PRVREG)
+ { SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register" },
+#endif
+#if defined (SIGILL) && defined (ILL_COPROC)
+ { SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error" },
+#endif
+#if defined (SIGILL) && defined (ILL_BADSTK)
+ { SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error" },
+#endif
+#if defined (SIGFPE) && defined (FPE_INTDIV)
+ { SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero" },
+#endif
+#if defined (SIGFPE) && defined (FPE_INTOVF)
+ { SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow" },
+#endif
+#if defined (SIGFPE) && defined (FPE_FLTDIV)
+ { SIGFPE, FPE_FLTDIV, "FPE_FLTDIV", "Floating point divide by zero" },
+#endif
+#if defined (SIGFPE) && defined (FPE_FLTOVF)
+ { SIGFPE, FPE_FLTOVF, "FPE_FLTOVF", "Floating point overflow" },
+#endif
+#if defined (SIGFPE) && defined (FPE_FLTUND)
+ { SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating point underflow" },
+#endif
+#if defined (SIGFPE) && defined (FPE_FLTRES)
+ { SIGFPE, FPE_FLTRES, "FPE_FLTRES", "Floating point inexact result" },
+#endif
+#if defined (SIGFPE) && defined (FPE_FLTINV)
+ { SIGFPE, FPE_FLTINV, "FPE_FLTINV", "Invalid floating point operation" },
+#endif
+#if defined (SIGFPE) && defined (FPE_FLTSUB)
+ { SIGFPE, FPE_FLTSUB, "FPE_FLTSUB", "Subscript out of range" },
+#endif
+#if defined (SIGSEGV) && defined (SEGV_MAPERR)
+ { SIGSEGV, SEGV_MAPERR, "SEGV_MAPERR", "Address not mapped to object" },
+#endif
+#if defined (SIGSEGV) && defined (SEGV_ACCERR)
+ { SIGSEGV, SEGV_ACCERR, "SEGV_ACCERR", "Invalid permissions for object" },
+#endif
+#if defined (SIGBUS) && defined (BUS_ADRALN)
+ { SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment" },
+#endif
+#if defined (SIGBUS) && defined (BUS_ADRERR)
+ { SIGBUS, BUS_ADRERR, "BUS_ADRERR", "Non-existent physical address" },
+#endif
+#if defined (SIGBUS) && defined (BUS_OBJERR)
+ { SIGBUS, BUS_OBJERR, "BUS_OBJERR", "Object specific hardware error" },
+#endif
+#if defined (SIGTRAP) && defined (TRAP_BRKPT)
+ { SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint" },
+#endif
+#if defined (SIGTRAP) && defined (TRAP_TRACE)
+ { SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap" },
+#endif
+#if defined (SIGCLD) && defined (CLD_EXITED)
+ { SIGCLD, CLD_EXITED, "CLD_EXITED", "Child has exited" },
+#endif
+#if defined (SIGCLD) && defined (CLD_KILLED)
+ { SIGCLD, CLD_KILLED, "CLD_KILLED", "Child was killed" },
+#endif
+#if defined (SIGCLD) && defined (CLD_DUMPED)
+ { SIGCLD, CLD_DUMPED, "CLD_DUMPED", "Child has terminated abnormally" },
+#endif
+#if defined (SIGCLD) && defined (CLD_TRAPPED)
+ { SIGCLD, CLD_TRAPPED, "CLD_TRAPPED", "Traced child has trapped" },
+#endif
+#if defined (SIGCLD) && defined (CLD_STOPPED)
+ { SIGCLD, CLD_STOPPED, "CLD_STOPPED", "Child has stopped" },
+#endif
+#if defined (SIGCLD) && defined (CLD_CONTINUED)
+ { SIGCLD, CLD_CONTINUED, "CLD_CONTINUED", "Stopped child had continued" },
+#endif
+#if defined (SIGPOLL) && defined (POLL_IN)
+ { SIGPOLL, POLL_IN, "POLL_IN", "Input input available" },
+#endif
+#if defined (SIGPOLL) && defined (POLL_OUT)
+ { SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available" },
+#endif
+#if defined (SIGPOLL) && defined (POLL_MSG)
+ { SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available" },
+#endif
+#if defined (SIGPOLL) && defined (POLL_ERR)
+ { SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error" },
+#endif
+#if defined (SIGPOLL) && defined (POLL_PRI)
+ { SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available" },
+#endif
+#if defined (SIGPOLL) && defined (POLL_HUP)
+ { SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected" },
+#endif
+ { 0, 0, NULL, NULL }
+};
-extern void
-fill_fpregset PARAMS ((fpregset_t *, int));
+static char *syscall_table[MAX_SYSCALLS];
+/* Prototypes for local functions */
-/*
+static void set_proc_siginfo PARAMS ((struct procinfo *, int));
-GLOBAL FUNCTION
+static void init_syscall_table PARAMS ((void));
- ptrace -- override library version to force errors for /proc version
+static char *syscallname PARAMS ((int));
-SYNOPSIS
+static char *signalname PARAMS ((int));
- int ptrace (int request, int pid, int arg3, int arg4)
+static char *errnoname PARAMS ((int));
-DESCRIPTION
+static int proc_address_to_fd PARAMS ((struct procinfo *, CORE_ADDR, int));
- When gdb is configured to use /proc, it should not be calling
- or otherwise attempting to use ptrace. In order to catch errors
- where use of /proc is configured, but some routine is still calling
- ptrace, we provide a local version of a function with that name
- that does nothing but issue an error message.
-*/
+static int open_proc_file PARAMS ((int, struct procinfo *, int));
-int
-ptrace (request, pid, arg3, arg4)
- int request;
- int pid;
- int arg3;
- int arg4;
-{
- error ("internal error - there is a call to ptrace() somewhere");
- /*NOTREACHED*/
-}
+static void close_proc_file PARAMS ((struct procinfo *));
-/*
+static void unconditionally_kill_inferior PARAMS ((struct procinfo *));
-GLOBAL FUNCTION
+static NORETURN void proc_init_failed PARAMS ((struct procinfo *, char *)) ATTR_NORETURN;
- kill_inferior_fast -- kill inferior while gdb is exiting
+static void info_proc PARAMS ((char *, int));
-SYNOPSIS
+static void info_proc_flags PARAMS ((struct procinfo *, int));
- void kill_inferior_fast (void)
+static void info_proc_stop PARAMS ((struct procinfo *, int));
-DESCRIPTION
+static void info_proc_siginfo PARAMS ((struct procinfo *, int));
- This is used when GDB is exiting. It gives less chance of error.
+static void info_proc_syscalls PARAMS ((struct procinfo *, int));
-NOTES
+static void info_proc_mappings PARAMS ((struct procinfo *, int));
- Don't attempt to kill attached inferiors since we may be called
- when gdb is in the process of aborting, and killing the attached
- inferior may be very anti-social. This is particularly true if we
- were attached just so we could use the /proc facilities to get
- detailed information about it's status.
+static void info_proc_signals PARAMS ((struct procinfo *, int));
-*/
+static void info_proc_faults PARAMS ((struct procinfo *, int));
-void
-kill_inferior_fast ()
-{
- if (inferior_pid != 0 && !attach_flag)
- {
- unconditionally_kill_inferior ();
- }
-}
+static char *mappingflags PARAMS ((long));
-/*
+static char *lookupname PARAMS ((struct trans *, unsigned int, char *));
-GLOBAL FUNCTION
+static char *lookupdesc PARAMS ((struct trans *, unsigned int));
- kill_inferior - kill any currently inferior
+static int do_attach PARAMS ((int pid));
-SYNOPSIS
+static void do_detach PARAMS ((int siggnal));
- void kill_inferior (void)
+static void procfs_create_inferior PARAMS ((char *, char *, char **));
-DESCRIPTION
+static void procfs_notice_signals PARAMS ((int pid));
- Kill any current inferior.
+static struct procinfo *find_procinfo PARAMS ((pid_t pid, int okfail));
-NOTES
+/* External function prototypes that can't be easily included in any
+ header file because the args are typedefs in system include files. */
- Kills even attached inferiors. Presumably the user has already
- been prompted that the inferior is an attached one rather than
- one started by gdb. (FIXME?)
+extern void supply_gregset PARAMS ((gregset_t *));
-*/
+extern void fill_gregset PARAMS ((gregset_t *, int));
-void
-kill_inferior ()
-{
- if (inferior_pid != 0)
- {
- unconditionally_kill_inferior ();
- target_mourn_inferior ();
- }
-}
+extern void supply_fpregset PARAMS ((fpregset_t *));
+
+extern void fill_fpregset PARAMS ((fpregset_t *, int));
/*
LOCAL FUNCTION
- unconditionally_kill_inferior - terminate the inferior
+ find_procinfo -- convert a process id to a struct procinfo
SYNOPSIS
- static void unconditionally_kill_inferior (void)
+ static struct procinfo * find_procinfo (pid_t pid, int okfail);
DESCRIPTION
+
+ Given a process id, look it up in the procinfo chain. Returns
+ a struct procinfo *. If can't find pid, then call error(),
+ unless okfail is set, in which case, return NULL;
+ */
- Kill the current inferior. Should not be called until it
- is at least tested that there is an inferior.
-
-NOTE
+static struct procinfo *
+find_procinfo (pid, okfail)
+ pid_t pid;
+ int okfail;
+{
+ struct procinfo *procinfo;
- A possibly useful enhancement would be to first try sending
- the inferior a terminate signal, politely asking it to commit
- suicide, before we murder it.
+ for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
+ if (procinfo->pid == pid)
+ return procinfo;
-*/
+ if (okfail)
+ return NULL;
-static void
-unconditionally_kill_inferior ()
-{
- int signo;
-
- signo = SIGKILL;
- (void) ioctl (pi.fd, PIOCKILL, &signo);
- close_proc_file (&pi);
- wait ((int *) 0);
+ error ("procfs (find_procinfo): Couldn't locate pid %d", pid);
}
/*
-GLOBAL FUNCTION
+LOCAL MACRO
- child_xfer_memory -- copy data to or from inferior memory space
+ current_procinfo -- convert inferior_pid to a struct procinfo
SYNOPSIS
- int child_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
- int dowrite, struct target_ops target)
+ static struct procinfo * current_procinfo;
DESCRIPTION
+
+ Looks up inferior_pid in the procinfo chain. Always returns a
+ struct procinfo *. If process can't be found, we error() out.
+ */
- Copy LEN bytes to/from inferior's memory starting at MEMADDR
- from/to debugger memory starting at MYADDR. Copy from inferior
- if DOWRITE is zero or to inferior if DOWRITE is nonzero.
-
- Returns the length copied, which is either the LEN argument or
- zero. This xfer function does not do partial moves, since child_ops
- doesn't allow memory operations to cross below us in the target stack
- anyway.
+#define current_procinfo find_procinfo (inferior_pid, 0)
-NOTES
+/*
- The /proc interface makes this an almost trivial task.
+LOCAL FUNCTION
+
+ add_fd -- Add the fd to the poll/select list
+
+SYNOPSIS
+
+ static void add_fd (struct procinfo *);
+
+DESCRIPTION
+
+ Add the fd of the supplied procinfo to the list of fds used for
+ poll/select operations.
*/
+static void
+add_fd (pi)
+ struct procinfo *pi;
+{
+ if (num_poll_list <= 0)
+ poll_list = (struct pollfd *) xmalloc (sizeof (struct pollfd));
+ else
+ poll_list = (struct pollfd *) xrealloc (poll_list,
+ (num_poll_list + 1)
+ * sizeof (struct pollfd));
+ poll_list[num_poll_list].fd = pi->fd;
+ poll_list[num_poll_list].events = POLLPRI;
-int
-child_xfer_memory (memaddr, myaddr, len, dowrite, target)
- CORE_ADDR memaddr;
- char *myaddr;
- int len;
- int dowrite;
- struct target_ops *target; /* ignored */
+ num_poll_list++;
+}
+
+static void
+remove_fd (pi)
+ struct procinfo *pi;
{
- int nbytes = 0;
+ int i;
- if (lseek (pi.fd, (off_t) memaddr, 0) == (off_t) memaddr)
+ for (i = 0; i < num_poll_list; i++)
{
- if (dowrite)
+ if (poll_list[i].fd == pi->fd)
{
- nbytes = write (pi.fd, myaddr, len);
+ if (i != num_poll_list - 1)
+ memcpy (poll_list, poll_list + i + 1,
+ (num_poll_list - i - 1) * sizeof (struct pollfd));
+
+ num_poll_list--;
+
+ if (num_poll_list == 0)
+ free (poll_list);
+ else
+ poll_list = (struct pollfd *) xrealloc (poll_list,
+ num_poll_list
+ * sizeof (struct pollfd));
+ return;
}
- else
+ }
+}
+
+#define LOSING_POLL unixware_sux
+
+static struct procinfo *
+wait_fd ()
+{
+ struct procinfo *pi;
+ int num_fds;
+ int i;
+
+ set_sigint_trap (); /* Causes SIGINT to be passed on to the
+ attached process. */
+ set_sigio_trap ();
+
+#ifndef LOSING_POLL
+ num_fds = poll (poll_list, num_poll_list, -1);
+#else
+ pi = current_procinfo;
+
+ while (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
+ {
+ if (errno == ENOENT)
{
- nbytes = read (pi.fd, myaddr, len);
+ /* Process exited. */
+ pi->prstatus.pr_flags = 0;
+ break;
}
- if (nbytes < 0)
+ else if (errno != EINTR)
{
- nbytes = 0;
+ print_sys_errmsg (pi->pathname, errno);
+ error ("PIOCWSTOP failed");
}
}
- return (nbytes);
-}
-
-/*
-
-GLOBAL FUNCTION
+ pi->had_event = 1;
+#endif
+
+ clear_sigint_trap ();
+ clear_sigio_trap ();
- store_inferior_registers -- copy register values back to inferior
+#ifndef LOSING_POLL
-SYNOPSIS
+ if (num_fds <= 0)
+ {
+ print_sys_errmsg ("poll failed\n", errno);
+ error ("Poll failed, returned %d", num_fds);
+ }
- void store_inferior_registers (int regno)
+ for (i = 0; i < num_poll_list && num_fds > 0; i++)
+ {
+ if ((poll_list[i].revents & (POLLPRI|POLLERR|POLLHUP|POLLNVAL)) == 0)
+ continue;
+ for (pi = procinfo_list; pi; pi = pi->next)
+ {
+ if (poll_list[i].fd == pi->fd)
+ {
+ if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ error ("PIOCSTATUS failed");
+ }
+ num_fds--;
+ pi->had_event = 1;
+ break;
+ }
+ }
+ if (!pi)
+ error ("procfs_wait: Couldn't find procinfo for fd %d\n",
+ poll_list[i].fd);
+ }
+#endif /* LOSING_POLL */
-DESCRIPTION
+ return pi;
+}
- Store our current register values back into the inferior. If
- REGNO is -1 then store all the register, otherwise store just
- the value specified by REGNO.
+/*
-NOTES
+LOCAL FUNCTION
- If we are storing only a single register, we first have to get all
- the current values from the process, overwrite the desired register
- in the gregset with the one we want from gdb's registers, and then
- send the whole set back to the process. For writing all the
- registers, all we have to do is generate the gregset and send it to
- the process.
+ lookupdesc -- translate a value to a summary desc string
- Also note that the process has to be stopped on an event of interest
- for this to work, which basically means that it has to have been
- run under the control of one of the other /proc ioctl calls and not
- ptrace. Since we don't use ptrace anyway, we don't worry about this
- fine point, but it is worth noting for future reference.
+SYNOPSIS
- Gdb is confused about what this function is supposed to return.
- Some versions return a value, others return nothing. Some are
- declared to return a value and actually return nothing. Gdb ignores
- anything returned. (FIXME)
+ static char *lookupdesc (struct trans *transp, unsigned int val);
+DESCRIPTION
+
+ Given a pointer to a translation table and a value to be translated,
+ lookup the desc string and return it.
*/
-void
-store_inferior_registers (regno)
- int regno;
+static char *
+lookupdesc (transp, val)
+ struct trans *transp;
+ unsigned int val;
{
- if (regno != -1)
+ char *desc;
+
+ for (desc = NULL; transp -> name != NULL; transp++)
{
- (void) ioctl (pi.fd, PIOCGREG, &pi.gregset);
+ if (transp -> value == val)
+ {
+ desc = transp -> desc;
+ break;
+ }
}
- fill_gregset (&pi.gregset, regno);
- (void) ioctl (pi.fd, PIOCSREG, &pi.gregset);
-
-#if defined (FP0_REGNUM)
- /* Now repeat everything using the floating point register set, if the
- target has floating point hardware. Since we ignore the returned value,
- we'll never know whether it worked or not anyway. */
+ /* Didn't find a translation for the specified value, set a default one. */
- if (regno != -1)
+ if (desc == NULL)
{
- (void) ioctl (pi.fd, PIOCGFPREG, &pi.fpregset);
+ desc = "Unknown";
}
- fill_fpregset (&pi.fpregset, regno);
- (void) ioctl (pi.fd, PIOCSFPREG, &pi.fpregset);
-
-#endif /* FP0_REGNUM */
-
+ return (desc);
}
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
- inferior_proc_init - initialize access to a /proc entry
+ lookupname -- translate a value to symbolic name
SYNOPSIS
- void inferior_proc_init (int pid)
+ static char *lookupname (struct trans *transp, unsigned int val,
+ char *prefix);
DESCRIPTION
+
+ Given a pointer to a translation table, a value to be translated,
+ and a default prefix to return if the value can't be translated,
+ match the value with one of the translation table entries and
+ return a pointer to the symbolic name.
+
+ If no match is found it just returns the value as a printable string,
+ with the given prefix. The previous such value, if any, is freed
+ at this time.
+ */
- When gdb starts an inferior, this function is called in the parent
- process immediately after the fork. It waits for the child to stop
+static char *
+lookupname (transp, val, prefix)
+ struct trans *transp;
+ unsigned int val;
+ char *prefix;
+{
+ static char *locbuf;
+ char *name;
+
+ for (name = NULL; transp -> name != NULL; transp++)
+ {
+ if (transp -> value == val)
+ {
+ name = transp -> name;
+ break;
+ }
+ }
+
+ /* Didn't find a translation for the specified value, build a default
+ one using the specified prefix and return it. The lifetime of
+ the value is only until the next one is needed. */
+
+ if (name == NULL)
+ {
+ if (locbuf != NULL)
+ {
+ free (locbuf);
+ }
+ locbuf = xmalloc (strlen (prefix) + 16);
+ sprintf (locbuf, "%s %u", prefix, val);
+ name = locbuf;
+ }
+ return (name);
+}
+
+static char *
+sigcodename (sip)
+ siginfo_t *sip;
+{
+ struct sigcode *scp;
+ char *name = NULL;
+ static char locbuf[32];
+
+ for (scp = siginfo_table; scp -> codename != NULL; scp++)
+ {
+ if ((scp -> signo == sip -> si_signo) &&
+ (scp -> code == sip -> si_code))
+ {
+ name = scp -> codename;
+ break;
+ }
+ }
+ if (name == NULL)
+ {
+ sprintf (locbuf, "sigcode %u", sip -> si_signo);
+ name = locbuf;
+ }
+ return (name);
+}
+
+static char *
+sigcodedesc (sip)
+ siginfo_t *sip;
+{
+ struct sigcode *scp;
+ char *desc = NULL;
+
+ for (scp = siginfo_table; scp -> codename != NULL; scp++)
+ {
+ if ((scp -> signo == sip -> si_signo) &&
+ (scp -> code == sip -> si_code))
+ {
+ desc = scp -> desc;
+ break;
+ }
+ }
+ if (desc == NULL)
+ {
+ desc = "Unrecognized signal or trap use";
+ }
+ return (desc);
+}
+
+/*
+
+LOCAL FUNCTION
+
+ syscallname - translate a system call number into a system call name
+
+SYNOPSIS
+
+ char *syscallname (int syscallnum)
+
+DESCRIPTION
+
+ Given a system call number, translate it into the printable name
+ of a system call, or into "syscall <num>" if it is an unknown
+ number.
+ */
+
+static char *
+syscallname (syscallnum)
+ int syscallnum;
+{
+ static char locbuf[32];
+ char *rtnval;
+
+ if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS)
+ {
+ rtnval = syscall_table[syscallnum];
+ }
+ else
+ {
+ sprintf (locbuf, "syscall %u", syscallnum);
+ rtnval = locbuf;
+ }
+ return (rtnval);
+}
+
+/*
+
+LOCAL FUNCTION
+
+ init_syscall_table - initialize syscall translation table
+
+SYNOPSIS
+
+ void init_syscall_table (void)
+
+DESCRIPTION
+
+ Dynamically initialize the translation table to convert system
+ call numbers into printable system call names. Done once per
+ gdb run, on initialization.
+
+NOTES
+
+ This is awfully ugly, but preprocessor tricks to make it prettier
+ tend to be nonportable.
+ */
+
+static void
+init_syscall_table ()
+{
+#if defined (SYS_exit)
+ syscall_table[SYS_exit] = "exit";
+#endif
+#if defined (SYS_fork)
+ syscall_table[SYS_fork] = "fork";
+#endif
+#if defined (SYS_read)
+ syscall_table[SYS_read] = "read";
+#endif
+#if defined (SYS_write)
+ syscall_table[SYS_write] = "write";
+#endif
+#if defined (SYS_open)
+ syscall_table[SYS_open] = "open";
+#endif
+#if defined (SYS_close)
+ syscall_table[SYS_close] = "close";
+#endif
+#if defined (SYS_wait)
+ syscall_table[SYS_wait] = "wait";
+#endif
+#if defined (SYS_creat)
+ syscall_table[SYS_creat] = "creat";
+#endif
+#if defined (SYS_link)
+ syscall_table[SYS_link] = "link";
+#endif
+#if defined (SYS_unlink)
+ syscall_table[SYS_unlink] = "unlink";
+#endif
+#if defined (SYS_exec)
+ syscall_table[SYS_exec] = "exec";
+#endif
+#if defined (SYS_execv)
+ syscall_table[SYS_execv] = "execv";
+#endif
+#if defined (SYS_execve)
+ syscall_table[SYS_execve] = "execve";
+#endif
+#if defined (SYS_chdir)
+ syscall_table[SYS_chdir] = "chdir";
+#endif
+#if defined (SYS_time)
+ syscall_table[SYS_time] = "time";
+#endif
+#if defined (SYS_mknod)
+ syscall_table[SYS_mknod] = "mknod";
+#endif
+#if defined (SYS_chmod)
+ syscall_table[SYS_chmod] = "chmod";
+#endif
+#if defined (SYS_chown)
+ syscall_table[SYS_chown] = "chown";
+#endif
+#if defined (SYS_brk)
+ syscall_table[SYS_brk] = "brk";
+#endif
+#if defined (SYS_stat)
+ syscall_table[SYS_stat] = "stat";
+#endif
+#if defined (SYS_lseek)
+ syscall_table[SYS_lseek] = "lseek";
+#endif
+#if defined (SYS_getpid)
+ syscall_table[SYS_getpid] = "getpid";
+#endif
+#if defined (SYS_mount)
+ syscall_table[SYS_mount] = "mount";
+#endif
+#if defined (SYS_umount)
+ syscall_table[SYS_umount] = "umount";
+#endif
+#if defined (SYS_setuid)
+ syscall_table[SYS_setuid] = "setuid";
+#endif
+#if defined (SYS_getuid)
+ syscall_table[SYS_getuid] = "getuid";
+#endif
+#if defined (SYS_stime)
+ syscall_table[SYS_stime] = "stime";
+#endif
+#if defined (SYS_ptrace)
+ syscall_table[SYS_ptrace] = "ptrace";
+#endif
+#if defined (SYS_alarm)
+ syscall_table[SYS_alarm] = "alarm";
+#endif
+#if defined (SYS_fstat)
+ syscall_table[SYS_fstat] = "fstat";
+#endif
+#if defined (SYS_pause)
+ syscall_table[SYS_pause] = "pause";
+#endif
+#if defined (SYS_utime)
+ syscall_table[SYS_utime] = "utime";
+#endif
+#if defined (SYS_stty)
+ syscall_table[SYS_stty] = "stty";
+#endif
+#if defined (SYS_gtty)
+ syscall_table[SYS_gtty] = "gtty";
+#endif
+#if defined (SYS_access)
+ syscall_table[SYS_access] = "access";
+#endif
+#if defined (SYS_nice)
+ syscall_table[SYS_nice] = "nice";
+#endif
+#if defined (SYS_statfs)
+ syscall_table[SYS_statfs] = "statfs";
+#endif
+#if defined (SYS_sync)
+ syscall_table[SYS_sync] = "sync";
+#endif
+#if defined (SYS_kill)
+ syscall_table[SYS_kill] = "kill";
+#endif
+#if defined (SYS_fstatfs)
+ syscall_table[SYS_fstatfs] = "fstatfs";
+#endif
+#if defined (SYS_pgrpsys)
+ syscall_table[SYS_pgrpsys] = "pgrpsys";
+#endif
+#if defined (SYS_xenix)
+ syscall_table[SYS_xenix] = "xenix";
+#endif
+#if defined (SYS_dup)
+ syscall_table[SYS_dup] = "dup";
+#endif
+#if defined (SYS_pipe)
+ syscall_table[SYS_pipe] = "pipe";
+#endif
+#if defined (SYS_times)
+ syscall_table[SYS_times] = "times";
+#endif
+#if defined (SYS_profil)
+ syscall_table[SYS_profil] = "profil";
+#endif
+#if defined (SYS_plock)
+ syscall_table[SYS_plock] = "plock";
+#endif
+#if defined (SYS_setgid)
+ syscall_table[SYS_setgid] = "setgid";
+#endif
+#if defined (SYS_getgid)
+ syscall_table[SYS_getgid] = "getgid";
+#endif
+#if defined (SYS_signal)
+ syscall_table[SYS_signal] = "signal";
+#endif
+#if defined (SYS_msgsys)
+ syscall_table[SYS_msgsys] = "msgsys";
+#endif
+#if defined (SYS_sys3b)
+ syscall_table[SYS_sys3b] = "sys3b";
+#endif
+#if defined (SYS_acct)
+ syscall_table[SYS_acct] = "acct";
+#endif
+#if defined (SYS_shmsys)
+ syscall_table[SYS_shmsys] = "shmsys";
+#endif
+#if defined (SYS_semsys)
+ syscall_table[SYS_semsys] = "semsys";
+#endif
+#if defined (SYS_ioctl)
+ syscall_table[SYS_ioctl] = "ioctl";
+#endif
+#if defined (SYS_uadmin)
+ syscall_table[SYS_uadmin] = "uadmin";
+#endif
+#if defined (SYS_utssys)
+ syscall_table[SYS_utssys] = "utssys";
+#endif
+#if defined (SYS_fsync)
+ syscall_table[SYS_fsync] = "fsync";
+#endif
+#if defined (SYS_umask)
+ syscall_table[SYS_umask] = "umask";
+#endif
+#if defined (SYS_chroot)
+ syscall_table[SYS_chroot] = "chroot";
+#endif
+#if defined (SYS_fcntl)
+ syscall_table[SYS_fcntl] = "fcntl";
+#endif
+#if defined (SYS_ulimit)
+ syscall_table[SYS_ulimit] = "ulimit";
+#endif
+#if defined (SYS_rfsys)
+ syscall_table[SYS_rfsys] = "rfsys";
+#endif
+#if defined (SYS_rmdir)
+ syscall_table[SYS_rmdir] = "rmdir";
+#endif
+#if defined (SYS_mkdir)
+ syscall_table[SYS_mkdir] = "mkdir";
+#endif
+#if defined (SYS_getdents)
+ syscall_table[SYS_getdents] = "getdents";
+#endif
+#if defined (SYS_sysfs)
+ syscall_table[SYS_sysfs] = "sysfs";
+#endif
+#if defined (SYS_getmsg)
+ syscall_table[SYS_getmsg] = "getmsg";
+#endif
+#if defined (SYS_putmsg)
+ syscall_table[SYS_putmsg] = "putmsg";
+#endif
+#if defined (SYS_poll)
+ syscall_table[SYS_poll] = "poll";
+#endif
+#if defined (SYS_lstat)
+ syscall_table[SYS_lstat] = "lstat";
+#endif
+#if defined (SYS_symlink)
+ syscall_table[SYS_symlink] = "symlink";
+#endif
+#if defined (SYS_readlink)
+ syscall_table[SYS_readlink] = "readlink";
+#endif
+#if defined (SYS_setgroups)
+ syscall_table[SYS_setgroups] = "setgroups";
+#endif
+#if defined (SYS_getgroups)
+ syscall_table[SYS_getgroups] = "getgroups";
+#endif
+#if defined (SYS_fchmod)
+ syscall_table[SYS_fchmod] = "fchmod";
+#endif
+#if defined (SYS_fchown)
+ syscall_table[SYS_fchown] = "fchown";
+#endif
+#if defined (SYS_sigprocmask)
+ syscall_table[SYS_sigprocmask] = "sigprocmask";
+#endif
+#if defined (SYS_sigsuspend)
+ syscall_table[SYS_sigsuspend] = "sigsuspend";
+#endif
+#if defined (SYS_sigaltstack)
+ syscall_table[SYS_sigaltstack] = "sigaltstack";
+#endif
+#if defined (SYS_sigaction)
+ syscall_table[SYS_sigaction] = "sigaction";
+#endif
+#if defined (SYS_sigpending)
+ syscall_table[SYS_sigpending] = "sigpending";
+#endif
+#if defined (SYS_context)
+ syscall_table[SYS_context] = "context";
+#endif
+#if defined (SYS_evsys)
+ syscall_table[SYS_evsys] = "evsys";
+#endif
+#if defined (SYS_evtrapret)
+ syscall_table[SYS_evtrapret] = "evtrapret";
+#endif
+#if defined (SYS_statvfs)
+ syscall_table[SYS_statvfs] = "statvfs";
+#endif
+#if defined (SYS_fstatvfs)
+ syscall_table[SYS_fstatvfs] = "fstatvfs";
+#endif
+#if defined (SYS_nfssys)
+ syscall_table[SYS_nfssys] = "nfssys";
+#endif
+#if defined (SYS_waitsys)
+ syscall_table[SYS_waitsys] = "waitsys";
+#endif
+#if defined (SYS_sigsendsys)
+ syscall_table[SYS_sigsendsys] = "sigsendsys";
+#endif
+#if defined (SYS_hrtsys)
+ syscall_table[SYS_hrtsys] = "hrtsys";
+#endif
+#if defined (SYS_acancel)
+ syscall_table[SYS_acancel] = "acancel";
+#endif
+#if defined (SYS_async)
+ syscall_table[SYS_async] = "async";
+#endif
+#if defined (SYS_priocntlsys)
+ syscall_table[SYS_priocntlsys] = "priocntlsys";
+#endif
+#if defined (SYS_pathconf)
+ syscall_table[SYS_pathconf] = "pathconf";
+#endif
+#if defined (SYS_mincore)
+ syscall_table[SYS_mincore] = "mincore";
+#endif
+#if defined (SYS_mmap)
+ syscall_table[SYS_mmap] = "mmap";
+#endif
+#if defined (SYS_mprotect)
+ syscall_table[SYS_mprotect] = "mprotect";
+#endif
+#if defined (SYS_munmap)
+ syscall_table[SYS_munmap] = "munmap";
+#endif
+#if defined (SYS_fpathconf)
+ syscall_table[SYS_fpathconf] = "fpathconf";
+#endif
+#if defined (SYS_vfork)
+ syscall_table[SYS_vfork] = "vfork";
+#endif
+#if defined (SYS_fchdir)
+ syscall_table[SYS_fchdir] = "fchdir";
+#endif
+#if defined (SYS_readv)
+ syscall_table[SYS_readv] = "readv";
+#endif
+#if defined (SYS_writev)
+ syscall_table[SYS_writev] = "writev";
+#endif
+#if defined (SYS_xstat)
+ syscall_table[SYS_xstat] = "xstat";
+#endif
+#if defined (SYS_lxstat)
+ syscall_table[SYS_lxstat] = "lxstat";
+#endif
+#if defined (SYS_fxstat)
+ syscall_table[SYS_fxstat] = "fxstat";
+#endif
+#if defined (SYS_xmknod)
+ syscall_table[SYS_xmknod] = "xmknod";
+#endif
+#if defined (SYS_clocal)
+ syscall_table[SYS_clocal] = "clocal";
+#endif
+#if defined (SYS_setrlimit)
+ syscall_table[SYS_setrlimit] = "setrlimit";
+#endif
+#if defined (SYS_getrlimit)
+ syscall_table[SYS_getrlimit] = "getrlimit";
+#endif
+#if defined (SYS_lchown)
+ syscall_table[SYS_lchown] = "lchown";
+#endif
+#if defined (SYS_memcntl)
+ syscall_table[SYS_memcntl] = "memcntl";
+#endif
+#if defined (SYS_getpmsg)
+ syscall_table[SYS_getpmsg] = "getpmsg";
+#endif
+#if defined (SYS_putpmsg)
+ syscall_table[SYS_putpmsg] = "putpmsg";
+#endif
+#if defined (SYS_rename)
+ syscall_table[SYS_rename] = "rename";
+#endif
+#if defined (SYS_uname)
+ syscall_table[SYS_uname] = "uname";
+#endif
+#if defined (SYS_setegid)
+ syscall_table[SYS_setegid] = "setegid";
+#endif
+#if defined (SYS_sysconfig)
+ syscall_table[SYS_sysconfig] = "sysconfig";
+#endif
+#if defined (SYS_adjtime)
+ syscall_table[SYS_adjtime] = "adjtime";
+#endif
+#if defined (SYS_systeminfo)
+ syscall_table[SYS_systeminfo] = "systeminfo";
+#endif
+#if defined (SYS_seteuid)
+ syscall_table[SYS_seteuid] = "seteuid";
+#endif
+#if defined (SYS_sproc)
+ syscall_table[SYS_sproc] = "sproc";
+#endif
+}
+
+/*
+
+LOCAL FUNCTION
+
+ procfs_kill_inferior - kill any currently inferior
+
+SYNOPSIS
+
+ void procfs_kill_inferior (void)
+
+DESCRIPTION
+
+ Kill any current inferior.
+
+NOTES
+
+ Kills even attached inferiors. Presumably the user has already
+ been prompted that the inferior is an attached one rather than
+ one started by gdb. (FIXME?)
+
+*/
+
+static void
+procfs_kill_inferior ()
+{
+ target_mourn_inferior ();
+}
+
+/*
+
+LOCAL FUNCTION
+
+ unconditionally_kill_inferior - terminate the inferior
+
+SYNOPSIS
+
+ static void unconditionally_kill_inferior (struct procinfo *)
+
+DESCRIPTION
+
+ Kill the specified inferior.
+
+NOTE
+
+ A possibly useful enhancement would be to first try sending
+ the inferior a terminate signal, politely asking it to commit
+ suicide, before we murder it (we could call that
+ politely_kill_inferior()).
+
+*/
+
+static void
+unconditionally_kill_inferior (pi)
+ struct procinfo *pi;
+{
+ int signo;
+ int ppid;
+
+ ppid = pi->prstatus.pr_ppid;
+
+ signo = SIGKILL;
+
+#ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL
+ /* Alpha OSF/1 procfs needs a PIOCSSIG call with a SIGKILL signal
+ to kill the inferior, otherwise it might remain stopped with a
+ pending SIGKILL.
+ We do not check the result of the PIOCSSIG, the inferior might have
+ died already. */
+ {
+ struct siginfo newsiginfo;
+
+ memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
+ newsiginfo.si_signo = signo;
+ newsiginfo.si_code = 0;
+ newsiginfo.si_errno = 0;
+ newsiginfo.si_pid = getpid ();
+ newsiginfo.si_uid = getuid ();
+ ioctl (pi->fd, PIOCSSIG, &newsiginfo);
+ }
+#else
+ ioctl (pi->fd, PIOCKILL, &signo);
+#endif
+
+ close_proc_file (pi);
+
+/* Only wait() for our direct children. Our grandchildren zombies are killed
+ by the death of their parents. */
+
+ if (ppid == getpid())
+ wait ((int *) 0);
+}
+
+/*
+
+LOCAL FUNCTION
+
+ procfs_xfer_memory -- copy data to or from inferior memory space
+
+SYNOPSIS
+
+ int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
+ int dowrite, struct target_ops target)
+
+DESCRIPTION
+
+ Copy LEN bytes to/from inferior's memory starting at MEMADDR
+ from/to debugger memory starting at MYADDR. Copy from inferior
+ if DOWRITE is zero or to inferior if DOWRITE is nonzero.
+
+ Returns the length copied, which is either the LEN argument or
+ zero. This xfer function does not do partial moves, since procfs_ops
+ doesn't allow memory operations to cross below us in the target stack
+ anyway.
+
+NOTES
+
+ The /proc interface makes this an almost trivial task.
+ */
+
+static int
+procfs_xfer_memory (memaddr, myaddr, len, dowrite, target)
+ CORE_ADDR memaddr;
+ char *myaddr;
+ int len;
+ int dowrite;
+ struct target_ops *target; /* ignored */
+{
+ int nbytes = 0;
+ struct procinfo *pi;
+
+ pi = current_procinfo;
+
+ if (lseek(pi->fd, (off_t) memaddr, 0) == (off_t) memaddr)
+ {
+ if (dowrite)
+ {
+ nbytes = write (pi->fd, myaddr, len);
+ }
+ else
+ {
+ nbytes = read (pi->fd, myaddr, len);
+ }
+ if (nbytes < 0)
+ {
+ nbytes = 0;
+ }
+ }
+ return (nbytes);
+}
+
+/*
+
+LOCAL FUNCTION
+
+ procfs_store_registers -- copy register values back to inferior
+
+SYNOPSIS
+
+ void procfs_store_registers (int regno)
+
+DESCRIPTION
+
+ Store our current register values back into the inferior. If
+ REGNO is -1 then store all the register, otherwise store just
+ the value specified by REGNO.
+
+NOTES
+
+ If we are storing only a single register, we first have to get all
+ the current values from the process, overwrite the desired register
+ in the gregset with the one we want from gdb's registers, and then
+ send the whole set back to the process. For writing all the
+ registers, all we have to do is generate the gregset and send it to
+ the process.
+
+ Also note that the process has to be stopped on an event of interest
+ for this to work, which basically means that it has to have been
+ run under the control of one of the other /proc ioctl calls and not
+ ptrace. Since we don't use ptrace anyway, we don't worry about this
+ fine point, but it is worth noting for future reference.
+
+ Gdb is confused about what this function is supposed to return.
+ Some versions return a value, others return nothing. Some are
+ declared to return a value and actually return nothing. Gdb ignores
+ anything returned. (FIXME)
+
+ */
+
+static void
+procfs_store_registers (regno)
+ int regno;
+{
+ struct procinfo *pi;
+
+ pi = current_procinfo;
+
+ if (regno != -1)
+ {
+ ioctl (pi->fd, PIOCGREG, &pi->gregset);
+ }
+ fill_gregset (&pi->gregset, regno);
+ ioctl (pi->fd, PIOCSREG, &pi->gregset);
+
+#if defined (FP0_REGNUM)
+
+ /* Now repeat everything using the floating point register set, if the
+ target has floating point hardware. Since we ignore the returned value,
+ we'll never know whether it worked or not anyway. */
+
+ if (regno != -1)
+ {
+ ioctl (pi->fd, PIOCGFPREG, &pi->fpregset);
+ }
+ fill_fpregset (&pi->fpregset, regno);
+ ioctl (pi->fd, PIOCSFPREG, &pi->fpregset);
+
+#endif /* FP0_REGNUM */
+
+}
+
+/*
+
+LOCAL FUNCTION
+
+ create_procinfo - initialize access to a /proc entry
+
+SYNOPSIS
+
+ struct procinfo * create_procinfo (int pid)
+
+DESCRIPTION
+
+ Allocate a procinfo structure, open the /proc file and then set up the
+ set of signals and faults that are to be traced. Returns a pointer to
+ the new procinfo structure.
+
+NOTES
+
+ If proc_init_failed ever gets called, control returns to the command
+ processing loop via the standard error handling code.
+
+ */
+
+static struct procinfo *
+create_procinfo (pid)
+ int pid;
+{
+ struct procinfo *pi;
+
+ pi = find_procinfo (pid, 1);
+ if (pi != NULL)
+ return pi; /* All done! It already exists */
+
+ pi = (struct procinfo *) xmalloc (sizeof (struct procinfo));
+
+ if (!open_proc_file (pid, pi, O_RDWR))
+ proc_init_failed (pi, "can't open process file");
+
+ /* Add new process to process info list */
+
+ pi->next = procinfo_list;
+ procinfo_list = pi;
+
+ add_fd (pi); /* Add to list for poll/select */
+
+ memset ((char *) &pi->prrun, 0, sizeof (pi->prrun));
+ prfillset (&pi->prrun.pr_trace);
+ procfs_notice_signals (pid);
+ prfillset (&pi->prrun.pr_fault);
+ prdelset (&pi->prrun.pr_fault, FLTPAGE);
+
+#ifdef PROCFS_DONT_TRACE_FAULTS
+ premptyset (&pi->prrun.pr_fault);
+#endif
+
+ if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
+ proc_init_failed (pi, "PIOCWSTOP failed");
+
+ if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault) < 0)
+ proc_init_failed (pi, "PIOCSFAULT failed");
+
+ return pi;
+}
+
+/*
+
+LOCAL FUNCTION
+
+ procfs_init_inferior - initialize target vector and access to a
+ /proc entry
+
+SYNOPSIS
+
+ void procfs_init_inferior (int pid)
+
+DESCRIPTION
+
+ When gdb starts an inferior, this function is called in the parent
+ process immediately after the fork. It waits for the child to stop
on the return from the exec system call (the child itself takes care
of ensuring that this is set up), then sets up the set of signals
and faults that are to be traced.
If proc_init_failed ever gets called, control returns to the command
processing loop via the standard error handling code.
+
*/
-void
-inferior_proc_init (pid)
+static void
+procfs_init_inferior (pid)
int pid;
{
- if (!open_proc_file (pid, &pi))
- {
- proc_init_failed ("can't open process file");
- }
- else
+ push_target (&procfs_ops);
+
+ create_procinfo (pid);
+ add_thread (pid); /* Setup initial thread */
+
+#ifdef START_INFERIOR_TRAPS_EXPECTED
+ startup_inferior (START_INFERIOR_TRAPS_EXPECTED);
+#else
+ /* One trap to exec the shell, one to exec the program being debugged. */
+ startup_inferior (2);
+#endif
+}
+
+/*
+
+GLOBAL FUNCTION
+
+ procfs_notice_signals
+
+SYNOPSIS
+
+ static void procfs_notice_signals (int pid);
+
+DESCRIPTION
+
+ When the user changes the state of gdb's signal handling via the
+ "handle" command, this function gets called to see if any change
+ in the /proc interface is required. It is also called internally
+ by other /proc interface functions to initialize the state of
+ the traced signal set.
+
+ One thing it does is that signals for which the state is "nostop",
+ "noprint", and "pass", have their trace bits reset in the pr_trace
+ field, so that they are no longer traced. This allows them to be
+ delivered directly to the inferior without the debugger ever being
+ involved.
+ */
+
+static void
+procfs_notice_signals (pid)
+ int pid;
+{
+ int signo;
+ struct procinfo *pi;
+
+ pi = find_procinfo (pid, 0);
+
+ for (signo = 0; signo < NSIG; signo++)
{
- (void) memset (&pi.prrun, 0, sizeof (pi.prrun));
- prfillset (&pi.prrun.pr_trace);
- prfillset (&pi.prrun.pr_fault);
- prdelset (&pi.prrun.pr_fault, FLTPAGE);
- if (ioctl (pi.fd, PIOCWSTOP, &pi.prstatus) < 0)
+ if (signal_stop_state (target_signal_from_host (signo)) == 0 &&
+ signal_print_state (target_signal_from_host (signo)) == 0 &&
+ signal_pass_state (target_signal_from_host (signo)) == 1)
{
- proc_init_failed ("PIOCWSTOP failed");
+ prdelset (&pi->prrun.pr_trace, signo);
}
- else if (ioctl (pi.fd, PIOCSTRACE, &pi.prrun.pr_trace) < 0)
- {
- proc_init_failed ("PIOCSTRACE failed");
- }
- else if (ioctl (pi.fd, PIOCSFAULT, &pi.prrun.pr_fault) < 0)
+ else
{
- proc_init_failed ("PIOCSFAULT failed");
+ praddset (&pi->prrun.pr_trace, signo);
}
}
+ if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace))
+ {
+ print_sys_errmsg ("PIOCSTRACE failed", errno);
+ }
}
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
proc_set_exec_trap -- arrange for exec'd child to halt at startup
We need to use all local variables since the child may be sharing
it's data space with the parent, if vfork was used rather than
fork.
+
+ Also note that we want to turn off the inherit-on-fork flag in
+ the child process so that any grand-children start with all
+ tracing flags cleared.
*/
-void
+static void
proc_set_exec_trap ()
{
sysset_t exitset;
+ sysset_t entryset;
auto char procname[32];
int fd;
- (void) sprintf (procname, PROC_NAME_FMT, getpid ());
+ sprintf (procname, PROC_NAME_FMT, getpid ());
if ((fd = open (procname, O_RDWR)) < 0)
{
perror (procname);
- fflush (stderr);
+ gdb_flush (gdb_stderr);
_exit (127);
}
premptyset (&exitset);
+ premptyset (&entryset);
+
+#ifdef PIOCSSPCACT
+ /* Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
+ exits from exec system calls because of the user level loader. */
+ {
+ int prfs_flags;
+
+ if (ioctl (fd, PIOCGSPCACT, &prfs_flags) < 0)
+ {
+ perror (procname);
+ gdb_flush (gdb_stderr);
+ _exit (127);
+ }
+ prfs_flags |= PRFS_STOPEXEC;
+ if (ioctl (fd, PIOCSSPCACT, &prfs_flags) < 0)
+ {
+ perror (procname);
+ gdb_flush (gdb_stderr);
+ _exit (127);
+ }
+ }
+#else
+ /* GW: Rationale...
+ Not all systems with /proc have all the exec* syscalls with the same
+ names. On the SGI, for example, there is no SYS_exec, but there
+ *is* a SYS_execv. So, we try to account for that. */
+
+#ifdef SYS_exec
praddset (&exitset, SYS_exec);
+#endif
+#ifdef SYS_execve
praddset (&exitset, SYS_execve);
+#endif
+#ifdef SYS_execv
+ praddset (&exitset, SYS_execv);
+#endif
+
if (ioctl (fd, PIOCSEXIT, &exitset) < 0)
{
perror (procname);
- fflush (stderr);
+ gdb_flush (gdb_stderr);
_exit (127);
}
+#endif
+
+ praddset (&entryset, SYS_exit);
+
+ if (ioctl (fd, PIOCSENTRY, &entryset) < 0)
+ {
+ perror (procname);
+ gdb_flush (gdb_stderr);
+ _exit (126);
+ }
+
+ /* Turn off inherit-on-fork flag so that all grand-children of gdb
+ start with tracing flags cleared. */
+
+#if defined (PIOCRESET) /* New method */
+ {
+ long pr_flags;
+ pr_flags = PR_FORK;
+ ioctl (fd, PIOCRESET, &pr_flags);
+ }
+#else
+#if defined (PIOCRFORK) /* Original method */
+ ioctl (fd, PIOCRFORK, NULL);
+#endif
+#endif
+
+ /* Turn on run-on-last-close flag so that this process will not hang
+ if GDB goes away for some reason. */
+
+#if defined (PIOCSET) /* New method */
+ {
+ long pr_flags;
+ pr_flags = PR_RLC;
+ (void) ioctl (fd, PIOCSET, &pr_flags);
+ }
+#else
+#if defined (PIOCSRLC) /* Original method */
+ (void) ioctl (fd, PIOCSRLC, 0);
+#endif
+#endif
}
/*
int funcstat = 0;
struct prmap *prmaps;
struct prmap *prmap;
- CORE_ADDR baseaddr = 0;
+ struct procinfo *pi;
- if (pi.valid && (ioctl (pi.fd, PIOCNMAP, &nmap) == 0))
+ pi = current_procinfo;
+
+ if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0)
{
prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
- if (ioctl (pi.fd, PIOCMAP, prmaps) == 0)
+ if (ioctl (pi->fd, PIOCMAP, prmaps) == 0)
{
for (prmap = prmaps; prmap -> pr_size && funcstat == 0; ++prmap)
{
- fd = proc_address_to_fd ((CORE_ADDR) prmap -> pr_vaddr, 0);
+ fd = proc_address_to_fd (pi, (CORE_ADDR) prmap -> pr_vaddr, 0);
funcstat = (*func) (fd, (CORE_ADDR) prmap -> pr_vaddr);
close (fd);
}
return (funcstat);
}
+#if 0 /* Currently unused */
/*
GLOBAL FUNCTION
segment containing that address.
*/
-
-#if 0 /* Currently unused */
-
CORE_ADDR
proc_base_address (addr)
-CORE_ADDR addr;
+ CORE_ADDR addr;
{
int nmap;
struct prmap *prmaps;
struct prmap *prmap;
CORE_ADDR baseaddr = 0;
+ struct procinfo *pi;
- if (pi.valid && (ioctl (pi.fd, PIOCNMAP, &nmap) == 0))
+ pi = current_procinfo;
+
+ if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0)
{
prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
- if (ioctl (pi.fd, PIOCMAP, prmaps) == 0)
+ if (ioctl (pi->fd, PIOCMAP, prmaps) == 0)
{
for (prmap = prmaps; prmap -> pr_size; ++prmap)
{
/*
-GLOBAL_FUNCTION
+LOCAL FUNCTION
proc_address_to_fd -- return open fd for file mapped to address
SYNOPSIS
- int proc_address_to_fd (CORE_ADDR addr, complain)
+ int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
DESCRIPTION
*/
static int
-proc_address_to_fd (addr, complain)
+proc_address_to_fd (pi, addr, complain)
+ struct procinfo *pi;
CORE_ADDR addr;
int complain;
{
int fd = -1;
- if (pi.valid)
+ if ((fd = ioctl (pi->fd, PIOCOPENM, (caddr_t *) &addr)) < 0)
{
- if ((fd = ioctl (pi.fd, PIOCOPENM, (caddr_t *) &addr)) < 0)
+ if (complain)
{
- if (complain)
- {
- print_sys_errmsg (pi.pathname, errno);
- warning ("can't find mapped file for address 0x%x", addr);
- }
+ print_sys_errmsg (pi->pathname, errno);
+ warning ("can't find mapped file for address 0x%x", addr);
}
}
return (fd);
}
-#ifdef ATTACH_DETACH
+/* Attach to process PID, then initialize for debugging it
+ and wait for the trace-trap that results from attaching. */
+
+static void
+procfs_attach (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ char *exec_file;
+ int pid;
+
+ if (!args)
+ error_no_arg ("process-id to attach");
+
+ pid = atoi (args);
+
+ if (pid == getpid()) /* Trying to masturbate? */
+ error ("I refuse to debug myself!");
+
+ if (from_tty)
+ {
+ exec_file = (char *) get_exec_file (0);
+
+ if (exec_file)
+ printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, target_pid_to_str (pid));
+ else
+ printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid));
+
+ gdb_flush (gdb_stdout);
+ }
+
+ do_attach (pid);
+ inferior_pid = pid;
+ push_target (&procfs_ops);
+}
+
+
+/* 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. For this
+ to work, it may be necessary for the process to have been
+ previously attached. It *might* work if the program was
+ started via the normal ptrace (PTRACE_TRACEME). */
+
+static void
+procfs_detach (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ int siggnal = 0;
+
+ if (from_tty)
+ {
+ char *exec_file = get_exec_file (0);
+ if (exec_file == 0)
+ exec_file = "";
+ printf_unfiltered ("Detaching from program: %s %s\n",
+ exec_file, target_pid_to_str (inferior_pid));
+ gdb_flush (gdb_stdout);
+ }
+ if (args)
+ siggnal = atoi (args);
+
+ do_detach (siggnal);
+ inferior_pid = 0;
+ unpush_target (&procfs_ops); /* Pop out of handling an inferior */
+}
+
+/* Get ready to modify the registers array. On machines which store
+ individual registers, this doesn't need to do anything. On machines
+ which store all the registers in one fell swoop, this makes sure
+ that registers contains all the registers from the program being
+ debugged. */
+
+static void
+procfs_prepare_to_store ()
+{
+#ifdef CHILD_PREPARE_TO_STORE
+ CHILD_PREPARE_TO_STORE ();
+#endif
+}
+
+/* Print status information about what we're accessing. */
+
+static void
+procfs_files_info (ignore)
+ struct target_ops *ignore;
+{
+ printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
+ attach_flag? "attached": "child", target_pid_to_str (inferior_pid));
+}
+
+/* ARGSUSED */
+static void
+procfs_open (arg, from_tty)
+ char *arg;
+ int from_tty;
+{
+ error ("Use the \"run\" command to start a Unix child process.");
+}
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
- attach -- attach to an already existing process
+ do_attach -- attach to an already existing process
SYNOPSIS
- int attach (int pid)
+ int do_attach (int pid)
DESCRIPTION
The option of stopping at attach time is specific to the /proc
versions of gdb. Versions using ptrace force the attachee
- to stop.
+ to stop. (I have changed this version to do so, too. All you
+ have to do is "continue" to make it go on. -- gnu@cygnus.com)
*/
-int
-attach (pid)
+static int
+do_attach (pid)
int pid;
{
- if (!open_proc_file (pid, &pi))
+ int result;
+ struct procinfo *pi;
+
+ pi = (struct procinfo *) xmalloc (sizeof (struct procinfo));
+
+ if (!open_proc_file (pid, pi, O_RDWR))
{
- perror_with_name (pi.pathname);
+ free (pi);
+ perror_with_name (pi->pathname);
/* NOTREACHED */
}
+ /* Add new process to process info list */
+
+ pi->next = procinfo_list;
+ procinfo_list = pi;
+
+ add_fd (pi); /* Add to list for poll/select */
+
/* Get current status of process and if it is not already stopped,
then stop it. Remember whether or not it was stopped when we first
examined it. */
- if (ioctl (pi.fd, PIOCSTATUS, &pi.prstatus) < 0)
+ if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
{
- print_sys_errmsg (pi.pathname, errno);
- close_proc_file (&pi);
+ print_sys_errmsg (pi->pathname, errno);
+ close_proc_file (pi);
error ("PIOCSTATUS failed");
}
- if (pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
+ if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
{
- pi.was_stopped = 1;
+ pi->was_stopped = 1;
}
else
{
- pi.was_stopped = 0;
- if (query ("Process is currently running, stop it? "))
+ pi->was_stopped = 0;
+ if (1 || query ("Process is currently running, stop it? "))
{
- if (ioctl (pi.fd, PIOCSTOP, &pi.prstatus) < 0)
+ /* Make it run again when we close it. */
+#if defined (PIOCSET) /* New method */
+ {
+ long pr_flags;
+ pr_flags = PR_RLC;
+ result = ioctl (pi->fd, PIOCSET, &pr_flags);
+ }
+#else
+#if defined (PIOCSRLC) /* Original method */
+ result = ioctl (pi->fd, PIOCSRLC, 0);
+#endif
+#endif
+ if (result < 0)
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ close_proc_file (pi);
+ error ("PIOCSRLC or PIOCSET failed");
+ }
+ if (ioctl (pi->fd, PIOCSTOP, &pi->prstatus) < 0)
{
- print_sys_errmsg (pi.pathname, errno);
- close_proc_file (&pi);
+ print_sys_errmsg (pi->pathname, errno);
+ close_proc_file (pi);
error ("PIOCSTOP failed");
}
+ pi->nopass_next_sigstop = 1;
+ }
+ else
+ {
+ printf_unfiltered ("Ok, gdb will wait for %s to stop.\n", target_pid_to_str (pid));
}
}
-
+
/* Remember some things about the inferior that we will, or might, change
so that we can restore them when we detach. */
- (void) ioctl (pi.fd, PIOCGTRACE, &pi.trace);
- (void) ioctl (pi.fd, PIOCGFAULT, &pi.fltset);
- (void) ioctl (pi.fd, PIOCGENTRY, &pi.entryset);
- (void) ioctl (pi.fd, PIOCGEXIT, &pi.exitset);
+ ioctl (pi->fd, PIOCGTRACE, &pi->saved_trace);
+ ioctl (pi->fd, PIOCGHOLD, &pi->saved_sighold);
+ ioctl (pi->fd, PIOCGFAULT, &pi->saved_fltset);
+ ioctl (pi->fd, PIOCGENTRY, &pi->saved_entryset);
+ ioctl (pi->fd, PIOCGEXIT, &pi->saved_exitset);
/* Set up trace and fault sets, as gdb expects them. */
- (void) memset (&pi.prrun, 0, sizeof (pi.prrun));
- prfillset (&pi.prrun.pr_trace);
- prfillset (&pi.prrun.pr_fault);
- prdelset (&pi.prrun.pr_fault, FLTPAGE);
- if (ioctl (pi.fd, PIOCSFAULT, &pi.prrun.pr_fault))
+ memset (&pi->prrun, 0, sizeof (pi->prrun));
+ prfillset (&pi->prrun.pr_trace);
+ procfs_notice_signals (pid);
+ prfillset (&pi->prrun.pr_fault);
+ prdelset (&pi->prrun.pr_fault, FLTPAGE);
+
+#ifdef PROCFS_DONT_TRACE_FAULTS
+ premptyset (&pi->prrun.pr_fault);
+#endif
+
+ if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault))
{
print_sys_errmsg ("PIOCSFAULT failed", errno);
}
- if (ioctl (pi.fd, PIOCSTRACE, &pi.prrun.pr_trace))
+ if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace))
{
print_sys_errmsg ("PIOCSTRACE failed", errno);
}
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
- detach -- detach from an attached-to process
+ do_detach -- detach from an attached-to process
SYNOPSIS
- void detach (int signal)
+ void do_detach (int signal)
DESCRIPTION
be the ideal situation. (FIXME).
*/
-void
-detach (signal)
+static void
+do_detach (signal)
int signal;
{
+ int result;
+ struct procinfo *pi;
+
+ pi = current_procinfo;
+
if (signal)
{
- struct siginfo siginfo;
- siginfo.si_signo = signal;
- siginfo.si_code = 0;
- siginfo.si_errno = 0;
- if (ioctl (pi.fd, PIOCSSIG, &siginfo) < 0)
- {
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCSSIG failed.\n");
- }
+ set_proc_siginfo (pi, signal);
+ }
+ if (ioctl (pi->fd, PIOCSEXIT, &pi->saved_exitset) < 0)
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCSEXIT failed.\n");
}
- if (ioctl (pi.fd, PIOCSEXIT, &pi.exitset) < 0)
+ if (ioctl (pi->fd, PIOCSENTRY, &pi->saved_entryset) < 0)
{
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCSEXIT failed.\n");
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCSENTRY failed.\n");
}
- if (ioctl (pi.fd, PIOCSENTRY, &pi.entryset) < 0)
+ if (ioctl (pi->fd, PIOCSTRACE, &pi->saved_trace) < 0)
{
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCSENTRY failed.\n");
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCSTRACE failed.\n");
}
- if (ioctl (pi.fd, PIOCSTRACE, &pi.trace) < 0)
+ if (ioctl (pi->fd, PIOCSHOLD, &pi->saved_sighold) < 0)
{
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCSTRACE failed.\n");
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOSCHOLD failed.\n");
}
- if (ioctl (pi.fd, PIOCSFAULT, &pi.fltset) < 0)
+ if (ioctl (pi->fd, PIOCSFAULT, &pi->saved_fltset) < 0)
{
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCSFAULT failed.\n");
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCSFAULT failed.\n");
}
- if (ioctl (pi.fd, PIOCSTATUS, &pi.prstatus) < 0)
+ if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
{
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCSTATUS failed.\n");
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCSTATUS failed.\n");
}
else
{
- if (signal || (pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
+ if (signal || (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
{
- if (signal || !pi.was_stopped ||
+ if (signal || !pi->was_stopped ||
query ("Was stopped when attached, make it runnable again? "))
{
- (void) memset (&pi.prrun, 0, sizeof (pi.prrun));
- pi.prrun.pr_flags = PRCFAULT;
- if (ioctl (pi.fd, PIOCRUN, &pi.prrun))
+ /* Clear any pending signal if we want to detach without
+ a signal. */
+ if (signal == 0)
+ set_proc_siginfo (pi, signal);
+
+ /* Clear any fault that might have stopped it. */
+ if (ioctl (pi->fd, PIOCCFAULT, 0))
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCCFAULT failed.\n");
+ }
+
+ /* Make it run again when we close it. */
+#if defined (PIOCSET) /* New method */
+ {
+ long pr_flags;
+ pr_flags = PR_RLC;
+ result = ioctl (pi->fd, PIOCSET, &pr_flags);
+ }
+#else
+#if defined (PIOCSRLC) /* Original method */
+ result = ioctl (pi->fd, PIOCSRLC, 0);
+#endif
+#endif
+ if (result)
{
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCRUN failed.\n");
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCSRLC or PIOCSET failed.\n");
}
}
}
}
- close_proc_file (&pi);
+ close_proc_file (pi);
attach_flag = 0;
}
-#endif /* ATTACH_DETACH */
-
-/*
-
-GLOBAL FUNCTION
-
- proc_wait -- emulate wait() as much as possible
-
-SYNOPSIS
-
- int proc_wait (int *statloc)
-
-DESCRIPTION
-
- Try to emulate wait() as much as possible. Not sure why we can't
- just use wait(), but it seems to have problems when applied to a
- process being controlled with the /proc interface.
-
-NOTES
+/* emulate wait() as much as possible.
+ Wait for child to do something. Return pid of child, or -1 in case
+ of error; store status in *OURSTATUS.
+
+ Not sure why we can't
+ just use wait(), but it seems to have problems when applied to a
+ process being controlled with the /proc interface.
+
+ We have a race problem here with no obvious solution. We need to let
+ the inferior run until it stops on an event of interest, which means
+ that we need to use the PIOCWSTOP ioctl. However, we cannot use this
+ ioctl if the process is already stopped on something that is not an
+ event of interest, or the call will hang indefinitely. Thus we first
+ use PIOCSTATUS to see if the process is not stopped. If not, then we
+ use PIOCWSTOP. But during the window between the two, if the process
+ stops for any reason that is not an event of interest (such as a job
+ control signal) then gdb will hang. One possible workaround is to set
+ an alarm to wake up every minute of so and check to see if the process
+ is still running, and if so, then reissue the PIOCWSTOP. But this is
+ a real kludge, so has not been implemented. FIXME: investigate
+ alternatives.
+
+ FIXME: Investigate why wait() seems to have problems with programs
+ being control by /proc routines. */
- We have a race problem here with no obvious solution. We need to let
- the inferior run until it stops on an event of interest, which means
- that we need to use the PIOCWSTOP ioctl. However, we cannot use this
- ioctl if the process is already stopped on something that is not an
- event of interest, or the call will hang indefinitely. Thus we first
- use PIOCSTATUS to see if the process is not stopped. If not, then we
- use PIOCWSTOP. But during the window between the two, if the process
- stops for any reason that is not an event of interest (such as a job
- control signal) then gdb will hang. One possible workaround is to set
- an alarm to wake up every minute of so and check to see if the process
- is still running, and if so, then reissue the PIOCWSTOP. But this is
- a real kludge, so has not been implemented. FIXME: investigate
- alternatives.
-
- FIXME: Investigate why wait() seems to have problems with programs
- being control by /proc routines.
-
- */
-
-int
-proc_wait (statloc)
- int *statloc;
+static int
+procfs_wait (pid, ourstatus)
+ int pid;
+ struct target_waitstatus *ourstatus;
{
short what;
short why;
int statval = 0;
int checkerr = 0;
int rtnval = -1;
-
- if (ioctl (pi.fd, PIOCSTATUS, &pi.prstatus) < 0)
+ struct procinfo *pi;
+
+ if (pid != -1) /* Non-specific process? */
+ pi = NULL;
+ else
+ for (pi = procinfo_list; pi; pi = pi->next)
+ if (pi->had_event)
+ break;
+
+ if (!pi)
{
- checkerr++;
+ wait_again:
+
+ pi = wait_fd ();
}
- else if (!(pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
+
+ if (pid != -1)
+ for (pi = procinfo_list; pi; pi = pi->next)
+ if (pi->pid == pid && pi->had_event)
+ break;
+
+ if (!pi && !checkerr)
+ goto wait_again;
+
+ if (!checkerr && !(pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
{
- if (ioctl (pi.fd, PIOCWSTOP, &pi.prstatus) < 0)
+ if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
{
checkerr++;
}
rtnval = wait (&statval);
if (rtnval != inferior_pid)
{
+ print_sys_errmsg (pi->pathname, errno);
error ("PIOCWSTOP, wait failed, returned %d", rtnval);
/* NOTREACHED */
}
}
else
{
- print_sys_errmsg (pi.pathname, errno);
+ print_sys_errmsg (pi->pathname, errno);
error ("PIOCSTATUS or PIOCWSTOP failed.");
/* NOTREACHED */
}
}
- else if (pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
+ else if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
{
- rtnval = pi.prstatus.pr_pid;
- why = pi.prstatus.pr_why;
- what = pi.prstatus.pr_what;
- if (why == PR_SIGNALLED)
+ rtnval = pi->prstatus.pr_pid;
+ why = pi->prstatus.pr_why;
+ what = pi->prstatus.pr_what;
+
+ switch (why)
{
+ case PR_SIGNALLED:
statval = (what << 8) | 0177;
- }
- else if ((why == PR_SYSEXIT) &&
- (what == SYS_exec || what == SYS_execve))
- {
- statval = (SIGTRAP << 8) | 0177;
- }
- else if (why == PR_REQUESTED)
- {
+ break;
+ case PR_SYSENTRY:
+ if (what != SYS_exit)
+ error ("PR_SYSENTRY, unknown system call %d", what);
+
+ pi->prrun.pr_flags = PRCFAULT;
+
+ if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
+ perror_with_name (pi->pathname);
+
+ rtnval = wait (&statval);
+
+ break;
+ case PR_SYSEXIT:
+ switch (what)
+ {
+#ifdef SYS_exec
+ case SYS_exec:
+#endif
+#ifdef SYS_execve
+ case SYS_execve:
+#endif
+#ifdef SYS_execv
+ case SYS_execv:
+#endif
+ statval = (SIGTRAP << 8) | 0177;
+ break;
+#ifdef SYS_sproc
+ case SYS_sproc:
+/* We've just detected the completion of an sproc system call. Now we need to
+ setup a procinfo struct for this thread, and notify the thread system of the
+ new arrival. */
+
+/* If sproc failed, then nothing interesting happened. Continue the process and
+ go back to sleep. */
+
+ if (pi->prstatus.pr_errno != 0)
+ {
+ pi->prrun.pr_flags &= PRSTEP;
+ pi->prrun.pr_flags |= PRCFAULT;
+
+ if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
+ perror_with_name (pi->pathname);
+
+ goto wait_again;
+ }
+
+/* At this point, the new thread is stopped at it's first instruction, and
+ the parent is stopped at the exit from sproc. */
+
+/* Notify the caller of the arrival of a new thread. */
+ create_procinfo (pi->prstatus.pr_rval1);
+
+ rtnval = pi->prstatus.pr_rval1;
+ statval = (SIGTRAP << 8) | 0177;
+
+ break;
+ case SYS_fork:
+#ifdef SYS_vfork
+ case SYS_vfork:
+#endif
+/* At this point, we've detected the completion of a fork (or vfork) call in
+ our child. The grandchild is also stopped because we set inherit-on-fork
+ earlier. (Note that nobody has the grandchilds' /proc file open at this
+ point.) We will release the grandchild from the debugger by opening it's
+ /proc file and then closing it. Since run-on-last-close is set, the
+ grandchild continues on its' merry way. */
+
+ {
+ struct procinfo *pitemp;
+
+ pitemp = create_procinfo (pi->prstatus.pr_rval1);
+ if (pitemp)
+ close_proc_file (pitemp);
+
+ if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
+ perror_with_name (pi->pathname);
+ }
+ goto wait_again;
+#endif /* SYS_sproc */
+
+ default:
+ error ("PIOCSTATUS (PR_SYSEXIT): Unknown system call %d", what);
+ }
+ break;
+ case PR_REQUESTED:
statval = (SIGSTOP << 8) | 0177;
- }
- else if (why == PR_JOBCONTROL)
- {
+ break;
+ case PR_JOBCONTROL:
statval = (what << 8) | 0177;
- }
- else if (why == PR_FAULTED)
- {
+ break;
+ case PR_FAULTED:
switch (what)
{
+#ifdef FLTWATCH
+ case FLTWATCH:
+ statval = (SIGTRAP << 8) | 0177;
+ break;
+#endif
+#ifdef FLTKWATCH
+ case FLTKWATCH:
+ statval = (SIGTRAP << 8) | 0177;
+ break;
+#endif
+#ifndef FAULTED_USE_SIGINFO
+ /* Irix, contrary to the documentation, fills in 0 for si_signo.
+ Solaris fills in si_signo. I'm not sure about others. */
case FLTPRIV:
case FLTILL:
statval = (SIGILL << 8) | 0177;
case FLTBPT:
case FLTTRACE:
statval = (SIGTRAP << 8) | 0177;
- break;
+ break;
case FLTSTACK:
case FLTACCESS:
case FLTBOUNDS:
statval = (SIGFPE << 8) | 0177;
break;
case FLTPAGE: /* Recoverable page fault */
+#endif /* not FAULTED_USE_SIGINFO */
default:
- rtnval = -1;
- error ("PIOCWSTOP, unknown why %d, what %d", why, what);
- /* NOTREACHED */
+ /* Use the signal which the kernel assigns. This is better than
+ trying to second-guess it from the fault. In fact, I suspect
+ that FLTACCESS can be either SIGSEGV or SIGBUS. */
+ statval = ((pi->prstatus.pr_info.si_signo) << 8) | 0177;
+ break;
}
- }
- else
- {
- rtnval = -1;
+ break;
+ default:
error ("PIOCWSTOP, unknown why %d, what %d", why, what);
- /* NOTREACHED */
}
+/* Stop all the other threads when any of them stops. */
+
+ {
+ struct procinfo *procinfo;
+
+ for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
+ {
+ if (!procinfo->had_event)
+ if (ioctl (procinfo->fd, PIOCSTOP, &procinfo->prstatus) < 0)
+ {
+ print_sys_errmsg (procinfo->pathname, errno);
+ error ("PIOCSTOP failed");
+ }
+ }
+ }
}
else
{
error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
- pi.prstatus.pr_flags);
- /* NOTREACHED */
+ pi->prstatus.pr_flags);
}
- if (statloc)
+
+ store_waitstatus (ourstatus, statval);
+
+ if (rtnval == -1) /* No more children to wait for */
{
- *statloc = statval;
+ fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing.\n");
+ /* Claim it exited with unknown signal. */
+ ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
+ ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
+ return rtnval;
}
+
+ pi->had_event = 0; /* Indicate that we've seen this one */
return (rtnval);
}
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
- child_resume -- resume execution of the inferior process
+ set_proc_siginfo - set a process's current signal info
SYNOPSIS
- void child_resume (int step, int signal)
+ void set_proc_siginfo (struct procinfo *pip, int signo);
DESCRIPTION
- Resume execution of the inferior process. If STEP is nozero, then
- just single step it. If SIGNAL is nonzero, restart it with that
- signal activated.
+ Given a pointer to a process info struct in PIP and a signal number
+ in SIGNO, set the process's current signal and its associated signal
+ information. The signal will be delivered to the process immediately
+ after execution is resumed, even if it is being held. In addition,
+ this particular delivery will not cause another PR_SIGNALLED stop
+ even if the signal is being traced.
+
+ If we are not delivering the same signal that the prstatus siginfo
+ struct contains information about, then synthesize a siginfo struct
+ to match the signal we are doing to deliver, make it of the type
+ "generated by a user process", and send this synthesized copy. When
+ used to set the inferior's signal state, this will be required if we
+ are not currently stopped because of a traced signal, or if we decide
+ to continue with a different signal.
+
+ Note that when continuing the inferior from a stop due to receipt
+ of a traced signal, we either have set PRCSIG to clear the existing
+ signal, or we have to call this function to do a PIOCSSIG with either
+ the existing siginfo struct from pr_info, or one we have synthesized
+ appropriately for the signal we want to deliver. Otherwise if the
+ signal is still being traced, the inferior will immediately stop
+ again.
+
+ See siginfo(5) for more details.
+*/
-NOTE
+static void
+set_proc_siginfo (pip, signo)
+ struct procinfo *pip;
+ int signo;
+{
+ struct siginfo newsiginfo;
+ struct siginfo *sip;
+
+#ifdef PROCFS_DONT_PIOCSSIG_CURSIG
+ /* With Alpha OSF/1 procfs, the kernel gets really confused if it
+ receives a PIOCSSIG with a signal identical to the current signal,
+ it messes up the current signal. Work around the kernel bug. */
+ if (signo == pip -> prstatus.pr_cursig)
+ return;
+#endif
- It may not be absolutely necessary to specify the PC value for
- restarting, but to be safe we use the value that gdb considers
- to be current. One case where this might be necessary is if the
- user explicitly changes the PC value that gdb considers to be
- current. FIXME: Investigate if this is necessary or not.
- */
+ if (signo == pip -> prstatus.pr_info.si_signo)
+ {
+ sip = &pip -> prstatus.pr_info;
+ }
+ else
+ {
+ memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
+ sip = &newsiginfo;
+ sip -> si_signo = signo;
+ sip -> si_code = 0;
+ sip -> si_errno = 0;
+ sip -> si_pid = getpid ();
+ sip -> si_uid = getuid ();
+ }
+ if (ioctl (pip -> fd, PIOCSSIG, sip) < 0)
+ {
+ print_sys_errmsg (pip -> pathname, errno);
+ warning ("PIOCSSIG failed");
+ }
+}
-void
-child_resume (step, signal)
+/* Resume execution of process PID. If STEP is nozero, then
+ just single step it. If SIGNAL is nonzero, restart it with that
+ signal activated. */
+
+static void
+procfs_resume (pid, step, signo)
+ int pid;
int step;
- int signal;
+ enum target_signal signo;
{
+ int signal_to_pass;
+ struct procinfo *pi, *procinfo;
+
+ pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
+
errno = 0;
- pi.prrun.pr_flags = PRSVADDR | PRSTRACE | PRSFAULT | PRCFAULT;
- pi.prrun.pr_vaddr = (caddr_t) *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)];
- if (signal)
+ pi->prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT;
+
+#if 0
+ /* It should not be necessary. If the user explicitly changes the value,
+ value_assign calls write_register_bytes, which writes it. */
+/* It may not be absolutely necessary to specify the PC value for
+ restarting, but to be safe we use the value that gdb considers
+ to be current. One case where this might be necessary is if the
+ user explicitly changes the PC value that gdb considers to be
+ current. FIXME: Investigate if this is necessary or not. */
+
+#ifdef PRSVADDR_BROKEN
+/* Can't do this under Solaris running on a Sparc, as there seems to be no
+ place to put nPC. In fact, if you use this, nPC seems to be set to some
+ random garbage. We have to rely on the fact that PC and nPC have been
+ written previously via PIOCSREG during a register flush. */
+
+ pi->prrun.pr_vaddr = (caddr_t) *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)];
+ pi->prrun.pr_flags != PRSVADDR;
+#endif
+#endif
+
+ if (signo == TARGET_SIGNAL_STOP && pi->nopass_next_sigstop)
+ /* When attaching to a child process, if we forced it to stop with
+ a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
+ Upon resuming the first time after such a stop, we explicitly
+ inhibit sending it another SIGSTOP, which would be the normal
+ result of default signal handling. One potential drawback to
+ this is that we will also ignore any attempt to by the user
+ to explicitly continue after the attach with a SIGSTOP. Ultimately
+ this problem should be dealt with by making the routines that
+ deal with the inferior a little smarter, and possibly even allow
+ an inferior to continue running at the same time as gdb. (FIXME?) */
+ signal_to_pass = 0;
+ else if (signo == TARGET_SIGNAL_TSTP
+ && pi->prstatus.pr_cursig == SIGTSTP
+ && pi->prstatus.pr_action.sa_handler == SIG_DFL)
+
+ /* We are about to pass the inferior a SIGTSTP whose action is
+ SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
+ (notifying the parent via wait()), and then keep going from the
+ same place when the parent is ready for you to keep going. So
+ under the debugger, it should do nothing (as if the program had
+ been stopped and then later resumed. Under ptrace, this
+ happens for us, but under /proc, the system obligingly stops
+ the process, and wait_for_inferior would have no way of
+ distinguishing that type of stop (which indicates that we
+ should just start it again), with a stop due to the pr_trace
+ field of the prrun_t struct.
+
+ Note that if the SIGTSTP is being caught, we *do* need to pass it,
+ because the handler needs to get executed. */
+ signal_to_pass = 0;
+ else
+ signal_to_pass = target_signal_to_host (signo);
+
+ if (signal_to_pass)
{
- if (signal != pi.prstatus.pr_cursig)
- {
- struct siginfo siginfo;
- siginfo.si_signo = signal;
- siginfo.si_code = 0;
- siginfo.si_errno = 0;
- (void) ioctl (pi.fd, PIOCSSIG, &siginfo);
- }
+ set_proc_siginfo (pi, signal_to_pass);
}
else
{
- pi.prrun.pr_flags |= PRCSIG;
+ pi->prrun.pr_flags |= PRCSIG;
}
+ pi->nopass_next_sigstop = 0;
if (step)
{
- pi.prrun.pr_flags |= PRSTEP;
+ pi->prrun.pr_flags |= PRSTEP;
}
- if (ioctl (pi.fd, PIOCRUN, &pi.prrun) != 0)
+ if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
{
- perror_with_name (pi.pathname);
+ perror_with_name (pi->pathname);
/* NOTREACHED */
}
+
+ pi->had_event = 0;
+
+ /* Continue all the other threads that haven't had an event of
+ interest. */
+
+ if (pid == -1)
+ for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
+ {
+ if (pi != procinfo && !procinfo->had_event)
+ {
+ procinfo->prrun.pr_flags &= PRSTEP;
+ procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG;
+ ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus);
+ if (ioctl (procinfo->fd, PIOCRUN, &procinfo->prrun) < 0)
+ {
+ if (ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus) < 0)
+ {
+ fprintf_unfiltered(gdb_stderr, "PIOCSTATUS failed, errno=%d\n", errno);
+ }
+ print_sys_errmsg (procinfo->pathname, errno);
+ error ("PIOCRUN failed");
+ }
+ ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus);
+ }
+ }
}
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
- fetch_inferior_registers -- fetch current registers from inferior
+ procfs_fetch_registers -- fetch current registers from inferior
SYNOPSIS
- void fetch_inferior_registers (int regno)
+ void procfs_fetch_registers (int regno)
DESCRIPTION
*/
-void
-fetch_inferior_registers (regno)
+static void
+procfs_fetch_registers (regno)
int regno;
{
- if (ioctl (pi.fd, PIOCGREG, &pi.gregset) != -1)
+ struct procinfo *pi;
+
+ pi = current_procinfo;
+
+ if (ioctl (pi->fd, PIOCGREG, &pi->gregset) != -1)
{
- supply_gregset (&pi.gregset);
+ supply_gregset (&pi->gregset);
}
#if defined (FP0_REGNUM)
- if (ioctl (pi.fd, PIOCGFPREG, &pi.fpregset) != -1)
+ if (ioctl (pi->fd, PIOCGFPREG, &pi->fpregset) != -1)
{
- supply_fpregset (&pi.fpregset);
+ supply_fpregset (&pi->fpregset);
}
#endif
}
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
- fetch_core_registers -- fetch current registers from core file data
+ proc_init_failed - called whenever /proc access initialization
+fails
SYNOPSIS
- void fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
- int which, unsigned in reg_addr)
+ static void proc_init_failed (struct procinfo *pi, char *why)
DESCRIPTION
- Read the values of either the general register set (WHICH equals 0)
- or the floating point register set (WHICH equals 2) from the core
- file data (pointed to by CORE_REG_SECT), and update gdb's idea of
- their current values. The CORE_REG_SIZE parameter is ignored.
+ This function is called whenever initialization of access to a /proc
+ entry fails. It prints a suitable error message, does some cleanup,
+ and then invokes the standard error processing routine which dumps
+ us back into the command loop.
+ */
-NOTES
+static void
+proc_init_failed (pi, why)
+ struct procinfo *pi;
+ char *why;
+{
+ print_sys_errmsg (pi->pathname, errno);
+ kill (pi->pid, SIGKILL);
+ close_proc_file (pi);
+ error (why);
+ /* NOTREACHED */
+}
- Use the indicated sizes to validate the gregset and fpregset
- structures.
-*/
+/*
+
+LOCAL FUNCTION
+
+ close_proc_file - close any currently open /proc entry
+
+SYNOPSIS
+
+ static void close_proc_file (struct procinfo *pip)
+
+DESCRIPTION
+
+ Close any currently open /proc entry and mark the process information
+ entry as invalid. In order to ensure that we don't try to reuse any
+ stale information, the pid, fd, and pathnames are explicitly
+ invalidated, which may be overkill.
+
+ */
+
+static void
+close_proc_file (pip)
+ struct procinfo *pip;
+{
+ struct procinfo *procinfo;
+
+ remove_fd (pip); /* Remove fd from poll/select list */
+
+ close (pip -> fd);
+
+ free (pip -> pathname);
+
+ /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
+
+ if (procinfo_list == pip)
+ procinfo_list = pip->next;
+ else
+ for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
+ if (procinfo->next == pip)
+ procinfo->next = pip->next;
+
+ free (pip);
+}
+
+/*
+
+LOCAL FUNCTION
+
+ open_proc_file - open a /proc entry for a given process id
+
+SYNOPSIS
+
+ static int open_proc_file (int pid, struct procinfo *pip, int mode)
+
+DESCRIPTION
+
+ Given a process id and a mode, close the existing open /proc
+ entry (if any) and open one for the new process id, in the
+ specified mode. Once it is open, then mark the local process
+ information structure as valid, which guarantees that the pid,
+ fd, and pathname fields match an open /proc entry. Returns
+ zero if the open fails, nonzero otherwise.
+
+ Note that the pathname is left intact, even when the open fails,
+ so that callers can use it to construct meaningful error messages
+ rather than just "file open failed".
+ */
+
+static int
+open_proc_file (pid, pip, mode)
+ int pid;
+ struct procinfo *pip;
+ int mode;
+{
+ pip -> next = NULL;
+ pip -> had_event = 0;
+ pip -> pathname = xmalloc (32);
+ pip -> pid = pid;
+
+ sprintf (pip -> pathname, PROC_NAME_FMT, pid);
+ if ((pip -> fd = open (pip -> pathname, mode)) < 0)
+ return 0;
+
+ return 1;
+}
+
+static char *
+mappingflags (flags)
+ long flags;
+{
+ static char asciiflags[8];
+
+ strcpy (asciiflags, "-------");
+#if defined (MA_PHYS)
+ if (flags & MA_PHYS) asciiflags[0] = 'd';
+#endif
+ if (flags & MA_STACK) asciiflags[1] = 's';
+ if (flags & MA_BREAK) asciiflags[2] = 'b';
+ if (flags & MA_SHARED) asciiflags[3] = 's';
+ if (flags & MA_READ) asciiflags[4] = 'r';
+ if (flags & MA_WRITE) asciiflags[5] = 'w';
+ if (flags & MA_EXEC) asciiflags[6] = 'x';
+ return (asciiflags);
+}
+
+static void
+info_proc_flags (pip, summary)
+ struct procinfo *pip;
+ int summary;
+{
+ struct trans *transp;
+
+ printf_filtered ("%-32s", "Process status flags:");
+ if (!summary)
+ {
+ printf_filtered ("\n\n");
+ }
+ for (transp = pr_flag_table; transp -> name != NULL; transp++)
+ {
+ if (pip -> prstatus.pr_flags & transp -> value)
+ {
+ if (summary)
+ {
+ printf_filtered ("%s ", transp -> name);
+ }
+ else
+ {
+ printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc);
+ }
+ }
+ }
+ printf_filtered ("\n");
+}
+
+static void
+info_proc_stop (pip, summary)
+ struct procinfo *pip;
+ int summary;
+{
+ struct trans *transp;
+ int why;
+ int what;
+
+ why = pip -> prstatus.pr_why;
+ what = pip -> prstatus.pr_what;
+
+ if (pip -> prstatus.pr_flags & PR_STOPPED)
+ {
+ printf_filtered ("%-32s", "Reason for stopping:");
+ if (!summary)
+ {
+ printf_filtered ("\n\n");
+ }
+ for (transp = pr_why_table; transp -> name != NULL; transp++)
+ {
+ if (why == transp -> value)
+ {
+ if (summary)
+ {
+ printf_filtered ("%s ", transp -> name);
+ }
+ else
+ {
+ printf_filtered ("\t%-16s %s.\n",
+ transp -> name, transp -> desc);
+ }
+ break;
+ }
+ }
+
+ /* Use the pr_why field to determine what the pr_what field means, and
+ print more information. */
+
+ switch (why)
+ {
+ case PR_REQUESTED:
+ /* pr_what is unused for this case */
+ break;
+ case PR_JOBCONTROL:
+ case PR_SIGNALLED:
+ if (summary)
+ {
+ printf_filtered ("%s ", signalname (what));
+ }
+ else
+ {
+ printf_filtered ("\t%-16s %s.\n", signalname (what),
+ safe_strsignal (what));
+ }
+ break;
+ case PR_SYSENTRY:
+ if (summary)
+ {
+ printf_filtered ("%s ", syscallname (what));
+ }
+ else
+ {
+ printf_filtered ("\t%-16s %s.\n", syscallname (what),
+ "Entered this system call");
+ }
+ break;
+ case PR_SYSEXIT:
+ if (summary)
+ {
+ printf_filtered ("%s ", syscallname (what));
+ }
+ else
+ {
+ printf_filtered ("\t%-16s %s.\n", syscallname (what),
+ "Returned from this system call");
+ }
+ break;
+ case PR_FAULTED:
+ if (summary)
+ {
+ printf_filtered ("%s ",
+ lookupname (faults_table, what, "fault"));
+ }
+ else
+ {
+ printf_filtered ("\t%-16s %s.\n",
+ lookupname (faults_table, what, "fault"),
+ lookupdesc (faults_table, what));
+ }
+ break;
+ }
+ printf_filtered ("\n");
+ }
+}
+
+static void
+info_proc_siginfo (pip, summary)
+ struct procinfo *pip;
+ int summary;
+{
+ struct siginfo *sip;
+
+ if ((pip -> prstatus.pr_flags & PR_STOPPED) &&
+ (pip -> prstatus.pr_why == PR_SIGNALLED ||
+ pip -> prstatus.pr_why == PR_FAULTED))
+ {
+ printf_filtered ("%-32s", "Additional signal/fault info:");
+ sip = &pip -> prstatus.pr_info;
+ if (summary)
+ {
+ printf_filtered ("%s ", signalname (sip -> si_signo));
+ if (sip -> si_errno > 0)
+ {
+ printf_filtered ("%s ", errnoname (sip -> si_errno));
+ }
+ if (sip -> si_code <= 0)
+ {
+ printf_filtered ("sent by %s, uid %d ",
+ target_pid_to_str (sip -> si_pid),
+ sip -> si_uid);
+ }
+ else
+ {
+ printf_filtered ("%s ", sigcodename (sip));
+ if ((sip -> si_signo == SIGILL) ||
+ (sip -> si_signo == SIGFPE) ||
+ (sip -> si_signo == SIGSEGV) ||
+ (sip -> si_signo == SIGBUS))
+ {
+ printf_filtered ("addr=%#lx ",
+ (unsigned long) sip -> si_addr);
+ }
+ else if ((sip -> si_signo == SIGCHLD))
+ {
+ printf_filtered ("child %s, status %u ",
+ target_pid_to_str (sip -> si_pid),
+ sip -> si_status);
+ }
+ else if ((sip -> si_signo == SIGPOLL))
+ {
+ printf_filtered ("band %u ", sip -> si_band);
+ }
+ }
+ }
+ else
+ {
+ printf_filtered ("\n\n");
+ printf_filtered ("\t%-16s %s.\n", signalname (sip -> si_signo),
+ safe_strsignal (sip -> si_signo));
+ if (sip -> si_errno > 0)
+ {
+ printf_filtered ("\t%-16s %s.\n",
+ errnoname (sip -> si_errno),
+ safe_strerror (sip -> si_errno));
+ }
+ if (sip -> si_code <= 0)
+ {
+ printf_filtered ("\t%-16u %s\n", sip -> si_pid, /* XXX need target_pid_to_str() */
+ "PID of process sending signal");
+ printf_filtered ("\t%-16u %s\n", sip -> si_uid,
+ "UID of process sending signal");
+ }
+ else
+ {
+ printf_filtered ("\t%-16s %s.\n", sigcodename (sip),
+ sigcodedesc (sip));
+ if ((sip -> si_signo == SIGILL) ||
+ (sip -> si_signo == SIGFPE))
+ {
+ printf_filtered ("\t%#-16lx %s.\n",
+ (unsigned long) sip -> si_addr,
+ "Address of faulting instruction");
+ }
+ else if ((sip -> si_signo == SIGSEGV) ||
+ (sip -> si_signo == SIGBUS))
+ {
+ printf_filtered ("\t%#-16lx %s.\n",
+ (unsigned long) sip -> si_addr,
+ "Address of faulting memory reference");
+ }
+ else if ((sip -> si_signo == SIGCHLD))
+ {
+ printf_filtered ("\t%-16u %s.\n", sip -> si_pid, /* XXX need target_pid_to_str() */
+ "Child process ID");
+ printf_filtered ("\t%-16u %s.\n", sip -> si_status,
+ "Child process exit value or signal");
+ }
+ else if ((sip -> si_signo == SIGPOLL))
+ {
+ printf_filtered ("\t%-16u %s.\n", sip -> si_band,
+ "Band event for POLL_{IN,OUT,MSG}");
+ }
+ }
+ }
+ printf_filtered ("\n");
+ }
+}
-void
-fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
- char *core_reg_sect;
- unsigned core_reg_size;
- int which;
- unsigned int reg_addr; /* Unused in this version */
+static void
+info_proc_syscalls (pip, summary)
+ struct procinfo *pip;
+ int summary;
{
+ int syscallnum;
- if (which == 0)
+ if (!summary)
{
- if (core_reg_size != sizeof (pi.gregset))
+
+#if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
+ if (pip -> prstatus.pr_flags & PR_ASLEEP)
{
- warning ("wrong size gregset struct in core file");
+ int syscallnum = pip -> prstatus.pr_reg[R_D0];
+ if (summary)
+ {
+ printf_filtered ("%-32s", "Sleeping in system call:");
+ printf_filtered ("%s", syscallname (syscallnum));
+ }
+ else
+ {
+ printf_filtered ("Sleeping in system call '%s'.\n",
+ syscallname (syscallnum));
+ }
}
- else
+#endif
+
+ if (ioctl (pip -> fd, PIOCGENTRY, &pip -> entryset) < 0)
{
- (void) memcpy ((char *) &pi.gregset, core_reg_sect,
- sizeof (pi.gregset));
- supply_gregset (&pi.gregset);
+ print_sys_errmsg (pip -> pathname, errno);
+ error ("PIOCGENTRY failed");
}
- }
- else if (which == 2)
- {
- if (core_reg_size != sizeof (pi.fpregset))
+
+ if (ioctl (pip -> fd, PIOCGEXIT, &pip -> exitset) < 0)
{
- warning ("wrong size fpregset struct in core file");
+ print_sys_errmsg (pip -> pathname, errno);
+ error ("PIOCGEXIT failed");
}
- else
+
+ printf_filtered ("System call tracing information:\n\n");
+
+ printf_filtered ("\t%-12s %-8s %-8s\n",
+ "System call",
+ "Entry",
+ "Exit");
+ for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++)
{
- (void) memcpy ((char *) &pi.fpregset, core_reg_sect,
- sizeof (pi.fpregset));
-#if defined (FP0_REGNUM)
- supply_fpregset (&pi.fpregset);
-#endif
- }
+ QUIT;
+ if (syscall_table[syscallnum] != NULL)
+ {
+ printf_filtered ("\t%-12s ", syscall_table[syscallnum]);
+ printf_filtered ("%-8s ",
+ prismember (&pip -> entryset, syscallnum)
+ ? "on" : "off");
+ printf_filtered ("%-8s ",
+ prismember (&pip -> exitset, syscallnum)
+ ? "on" : "off");
+ printf_filtered ("\n");
+ }
+ }
+ printf_filtered ("\n");
}
}
-/*
-
-LOCAL FUNCTION
-
- proc_init_failed - called whenever /proc access initialization fails
-
-SYNOPSIS
-
- static void proc_init_failed (char *why)
-
-DESCRIPTION
-
- This function is called whenever initialization of access to a /proc
- entry fails. It prints a suitable error message, does some cleanup,
- and then invokes the standard error processing routine which dumps
- us back into the command loop.
- */
-
-static void
-proc_init_failed (why)
- char *why;
+static char *
+signalname (signo)
+ int signo;
{
- print_sys_errmsg (pi.pathname, errno);
- (void) kill (pi.pid, SIGKILL);
- close_proc_file (&pi);
- error (why);
- /* NOTREACHED */
-}
-
-/*
-
-LOCAL FUNCTION
-
- close_proc_file - close any currently open /proc entry
-
-SYNOPSIS
-
- static void close_proc_file (struct procinfo *pip)
-
-DESCRIPTION
+ const char *name;
+ static char locbuf[32];
- Close any currently open /proc entry and mark the process information
- entry as invalid. In order to ensure that we don't try to reuse any
- stale information, the pid, fd, and pathnames are explicitly
- invalidated, which may be overkill.
-
- */
-
-static void
-close_proc_file (pip)
- struct procinfo *pip;
-{
- pip -> pid = 0;
- if (pip -> valid)
+ name = strsigno (signo);
+ if (name == NULL)
{
- (void) close (pip -> fd);
+ sprintf (locbuf, "Signal %d", signo);
}
- pip -> fd = -1;
- if (pip -> pathname)
+ else
{
- free (pip -> pathname);
- pip -> pathname = NULL;
+ sprintf (locbuf, "%s (%d)", name, signo);
}
- pip -> valid = 0;
+ return (locbuf);
}
-/*
-
-LOCAL FUNCTION
-
- open_proc_file - open a /proc entry for a given process id
-
-SYNOPSIS
-
- static int open_proc_file (pid, struct procinfo *pip)
-
-DESCRIPTION
-
- Given a process id, close the existing open /proc entry (if any)
- and open one for the new process id. Once it is open, then
- mark the local process information structure as valid, which
- guarantees that the pid, fd, and pathname fields match an open
- /proc entry. Returns zero if the open fails, nonzero otherwise.
-
- Note that the pathname is left intact, even when the open fails,
- so that callers can use it to construct meaningful error messages
- rather than just "file open failed".
- */
-
-static int
-open_proc_file (pid, pip)
- int pid;
- struct procinfo *pip;
+static char *
+errnoname (errnum)
+ int errnum;
{
- pip -> valid = 0;
- if (pip -> valid)
+ const char *name;
+ static char locbuf[32];
+
+ name = strerrno (errnum);
+ if (name == NULL)
{
- (void) close (pip -> fd);
+ sprintf (locbuf, "Errno %d", errnum);
}
- if (pip -> pathname == NULL)
+ else
{
- pip -> pathname = xmalloc (32);
+ sprintf (locbuf, "%s (%d)", name, errnum);
}
- sprintf (pip -> pathname, PROC_NAME_FMT, pid);
- if ((pip -> fd = open (pip -> pathname, O_RDWR)) >= 0)
+ return (locbuf);
+}
+
+static void
+info_proc_signals (pip, summary)
+ struct procinfo *pip;
+ int summary;
+{
+ int signo;
+
+ if (!summary)
{
- pip -> valid = 1;
- pip -> pid = pid;
+ if (ioctl (pip -> fd, PIOCGTRACE, &pip -> trace) < 0)
+ {
+ print_sys_errmsg (pip -> pathname, errno);
+ error ("PIOCGTRACE failed");
+ }
+
+ printf_filtered ("Disposition of signals:\n\n");
+ printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
+ "Signal", "Trace", "Hold", "Pending", "Description");
+ for (signo = 0; signo < NSIG; signo++)
+ {
+ QUIT;
+ printf_filtered ("\t%-15s ", signalname (signo));
+ printf_filtered ("%-8s ",
+ prismember (&pip -> trace, signo)
+ ? "on" : "off");
+ printf_filtered ("%-8s ",
+ prismember (&pip -> prstatus.pr_sighold, signo)
+ ? "on" : "off");
+
+#ifdef PROCFS_SIGPEND_OFFSET
+ /* Alpha OSF/1 numbers the pending signals from 1. */
+ printf_filtered ("%-8s ",
+ (signo ? prismember (&pip -> prstatus.pr_sigpend,
+ signo - 1)
+ : 0)
+ ? "yes" : "no");
+#else
+ printf_filtered ("%-8s ",
+ prismember (&pip -> prstatus.pr_sigpend, signo)
+ ? "yes" : "no");
+#endif
+ printf_filtered (" %s\n", safe_strsignal (signo));
+ }
+ printf_filtered ("\n");
}
- return (pip -> valid);
}
-static char *
-mappingflags (flags)
- long flags;
+static void
+info_proc_faults (pip, summary)
+ struct procinfo *pip;
+ int summary;
{
- static char asciiflags[7];
-
- strcpy (asciiflags, "------");
- if (flags & MA_STACK) asciiflags[0] = 's';
- if (flags & MA_BREAK) asciiflags[1] = 'b';
- if (flags & MA_SHARED) asciiflags[2] = 's';
- if (flags & MA_READ) asciiflags[3] = 'r';
- if (flags & MA_WRITE) asciiflags[4] = 'w';
- if (flags & MA_EXEC) asciiflags[5] = 'x';
- return (asciiflags);
+ struct trans *transp;
+
+ if (!summary)
+ {
+ if (ioctl (pip -> fd, PIOCGFAULT, &pip -> fltset) < 0)
+ {
+ print_sys_errmsg (pip -> pathname, errno);
+ error ("PIOCGFAULT failed");
+ }
+
+ printf_filtered ("Current traced hardware fault set:\n\n");
+ printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
+
+ for (transp = faults_table; transp -> name != NULL; transp++)
+ {
+ QUIT;
+ printf_filtered ("\t%-12s ", transp -> name);
+ printf_filtered ("%-8s", prismember (&pip -> fltset, transp -> value)
+ ? "on" : "off");
+ printf_filtered ("\n");
+ }
+ printf_filtered ("\n");
+ }
}
static void
-proc_info_address_map (pip, verbose)
+info_proc_mappings (pip, summary)
struct procinfo *pip;
- int verbose;
+ int summary;
{
int nmap;
struct prmap *prmaps;
struct prmap *prmap;
- printf_filtered ("Mapped address spaces:\n\n");
- printf_filtered ("\t%10s %10s %10s %10s %6s\n",
- "Start Addr",
- " End Addr",
- " Size",
- " Offset",
- "Flags");
- if (ioctl (pip -> fd, PIOCNMAP, &nmap) == 0)
+ if (!summary)
{
- prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
- if (ioctl (pip -> fd, PIOCMAP, prmaps) == 0)
+ printf_filtered ("Mapped address spaces:\n\n");
+#ifdef BFD_HOST_64_BIT
+ printf_filtered (" %18s %18s %10s %10s %7s\n",
+#else
+ printf_filtered ("\t%10s %10s %10s %10s %7s\n",
+#endif
+ "Start Addr",
+ " End Addr",
+ " Size",
+ " Offset",
+ "Flags");
+ if (ioctl (pip -> fd, PIOCNMAP, &nmap) == 0)
{
- for (prmap = prmaps; prmap -> pr_size; ++prmap)
+ prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
+ if (ioctl (pip -> fd, PIOCMAP, prmaps) == 0)
{
- printf_filtered ("\t%#10x %#10x %#10x %#10x %6s\n",
- prmap -> pr_vaddr,
- prmap -> pr_vaddr + prmap -> pr_size - 1,
- prmap -> pr_size,
- prmap -> pr_off,
- mappingflags (prmap -> pr_mflags));
+ for (prmap = prmaps; prmap -> pr_size; ++prmap)
+ {
+#ifdef BFD_HOST_64_BIT
+ printf_filtered (" %#18lx %#18lx %#10x %#10x %7s\n",
+#else
+ printf_filtered ("\t%#10lx %#10lx %#10x %#10x %7s\n",
+#endif
+ (unsigned long)prmap -> pr_vaddr,
+ (unsigned long)prmap -> pr_vaddr
+ + prmap -> pr_size - 1,
+ prmap -> pr_size,
+ prmap -> pr_off,
+ mappingflags (prmap -> pr_mflags));
+ }
}
}
+ printf_filtered ("\n");
}
- printf_filtered ("\n\n");
}
/*
LOCAL FUNCTION
- proc_info -- implement the "info proc" command
+ info_proc -- implement the "info proc" command
SYNOPSIS
- void proc_info (char *args, int from_tty)
+ void info_proc (char *args, int from_tty)
DESCRIPTION
Examples of the use of "info proc" are:
- info proc Print short info about current inferior.
- info proc verbose Print verbose info about current inferior.
- info proc 123 Print short info about process pid 123.
- info proc 123 verbose Print verbose info about process pid 123.
+ info proc (prints summary info for current inferior)
+ info proc 123 (prints summary info for process with pid 123)
+ info proc mappings (prints address mappings)
+ info proc times (prints process/children times)
+ info proc id (prints pid, ppid, gid, sid, etc)
+ FIXME: i proc id not implemented.
+ info proc status (prints general process state info)
+ FIXME: i proc status not implemented.
+ info proc signals (prints info about signal handling)
+ info proc all (prints all info)
*/
static void
-proc_info (args, from_tty)
+info_proc (args, from_tty)
char *args;
int from_tty;
{
- int verbose = 0;
int pid;
- struct procinfo pii;
struct procinfo *pip;
struct cleanup *old_chain;
- char *nexttok;
+ char **argv;
+ int argsize;
+ int summary = 1;
+ int flags = 0;
+ int syscalls = 0;
+ int signals = 0;
+ int faults = 0;
+ int mappings = 0;
+ int times = 0;
+ int id = 0;
+ int status = 0;
+ int all = 0;
old_chain = make_cleanup (null_cleanup, 0);
- /* Default to using the current inferior if no pid specified */
+ /* Default to using the current inferior if no pid specified. Note
+ that inferior_pid may be 0, hence we set okerr. */
- pip = π
+ pip = find_procinfo (inferior_pid, 1);
- /* Parse the args string, looking for "verbose" (or any abbrev) and
- for a specific pid. If a specific pid is found, the process
- file is opened. */
-
if (args != NULL)
{
- while ((nexttok = strtok (args, " \t")) != NULL)
+ if ((argv = buildargv (args)) == NULL)
+ {
+ nomem (0);
+ }
+ make_cleanup (freeargv, (char *) argv);
+
+ while (*argv != NULL)
{
- args = NULL;
- if (strncmp (nexttok, "verbose", strlen (nexttok)) == 0)
+ argsize = strlen (*argv);
+ if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0)
+ {
+ summary = 0;
+ all = 1;
+ }
+ else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0)
+ {
+ summary = 0;
+ faults = 1;
+ }
+ else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0)
+ {
+ summary = 0;
+ flags = 1;
+ }
+ else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0)
+ {
+ summary = 0;
+ id = 1;
+ }
+ else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0)
+ {
+ summary = 0;
+ mappings = 1;
+ }
+ else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0)
+ {
+ summary = 0;
+ signals = 1;
+ }
+ else if (argsize >= 2 && strncmp (*argv, "status", argsize) == 0)
+ {
+ summary = 0;
+ status = 1;
+ }
+ else if (argsize >= 2 && strncmp (*argv, "syscalls", argsize) == 0)
+ {
+ summary = 0;
+ syscalls = 1;
+ }
+ else if (argsize >= 1 && strncmp (*argv, "times", argsize) == 0)
{
- verbose++;
+ summary = 0;
+ times = 1;
}
- else if ((pii.pid = atoi (nexttok)) > 0)
+ else if ((pid = atoi (*argv)) > 0)
{
- pid = pii.pid;
- pip = &pii;
- (void) memset (&pii, 0, sizeof (pii));
- if (!open_proc_file (pid, pip))
+ pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
+ memset (pip, 0, sizeof (*pip));
+
+ pip->pid = pid;
+ if (!open_proc_file (pid, pip, O_RDONLY))
{
perror_with_name (pip -> pathname);
/* NOTREACHED */
}
make_cleanup (close_proc_file, pip);
}
+ else if (**argv != '\000')
+ {
+ error ("Unrecognized or ambiguous keyword `%s'.", *argv);
+ }
+ argv++;
}
}
/* If we don't have a valid open process at this point, then we have no
inferior or didn't specify a specific pid. */
- if (!pip -> valid)
+ if (!pip)
{
- error ("No process. Run an inferior or specify an explicit pid.");
+ error ("\
+No process. Start debugging a program or specify an explicit process ID.");
}
if (ioctl (pip -> fd, PIOCSTATUS, &(pip -> prstatus)) < 0)
{
error ("PIOCSTATUS failed");
}
- printf_filtered ("\nStatus information for %s:\n\n", pip -> pathname);
- proc_info_address_map (pip, verbose);
-#if 0
- proc_info_flags (pip, verbose);
- proc_info_why (pip, verbose);
- proc_info_what (pip, verbose);
- proc_info_info (pip, verbose);
- proc_info_cursig (pip, verbose);
- proc_info_sigpend (pip, verbose);
- proc_info_sighold (pip, verbose);
- proc_info_altstack (pip, verbose);
- proc_info_action (pip, verbose);
- proc_info_id (pip, verbose);
- proc_info_times (pip, verbose);
- proc_info_clname (pip,verbose);
- proc_info_instr (pip, verbose);
- proc_info_reg (pip, verbose);
-#endif
+ /* Print verbose information of the requested type(s), or just a summary
+ of the information for all types. */
+
+ printf_filtered ("\nInformation for %s:\n\n", pip -> pathname);
+ if (summary || all || flags)
+ {
+ info_proc_flags (pip, summary);
+ }
+ if (summary || all)
+ {
+ info_proc_stop (pip, summary);
+ }
+ if (summary || all || signals || faults)
+ {
+ info_proc_siginfo (pip, summary);
+ }
+ if (summary || all || syscalls)
+ {
+ info_proc_syscalls (pip, summary);
+ }
+ if (summary || all || mappings)
+ {
+ info_proc_mappings (pip, summary);
+ }
+ if (summary || all || signals)
+ {
+ info_proc_signals (pip, summary);
+ }
+ if (summary || all || faults)
+ {
+ info_proc_faults (pip, summary);
+ }
+ printf_filtered ("\n");
/* All done, deal with closing any temporary process info structure,
freeing temporary memory , etc. */
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
- _initialize_proc_fs -- initialize the process file system stuff
+ procfs_set_sproc_trap -- arrange for child to stop on sproc().
SYNOPSIS
- void _initialize_proc_fs (void)
+ void procfs_set_sproc_trap (struct procinfo *)
DESCRIPTION
- Do required initializations during gdb startup for using the
- /proc file system interface.
+ This function sets up a trap on sproc system call exits so that we can
+ detect the arrival of a new thread. We are called with the new thread
+ stopped prior to it's first instruction.
-*/
+ Also note that we turn on the inherit-on-fork flag in the child process
+ so that any grand-children start with all tracing flags set.
+ */
+
+#ifdef SYS_sproc
+
+static void
+procfs_set_sproc_trap (pi)
+ struct procinfo *pi;
+{
+ sysset_t exitset;
+
+ if (ioctl (pi->fd, PIOCGEXIT, &exitset) < 0)
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ error ("PIOCGEXIT failed");
+ }
+
+ praddset (&exitset, SYS_sproc);
+
+ /* We trap on fork() and vfork() in order to disable debugging in our grand-
+ children and descendant processes. At this time, GDB can only handle
+ threads (multiple processes, one address space). forks (and execs) result
+ in the creation of multiple address spaces, which GDB can't handle yet. */
+
+ praddset (&exitset, SYS_fork);
+#ifdef SYS_vfork
+ praddset (&exitset, SYS_vfork);
+#endif
+
+ if (ioctl (pi->fd, PIOCSEXIT, &exitset) < 0)
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ error ("PIOCSEXIT failed");
+ }
-static char *proc_desc =
-"Show current process status information using /proc entry.\n\
-With no arguments, prints short form. With 'verbose' prints long form.";
+ /* Turn on inherit-on-fork flag so that all grand-children of gdb start with
+ tracing flags set. */
+
+#ifdef PIOCSET /* New method */
+ {
+ long pr_flags;
+ pr_flags = PR_FORK;
+ ioctl (pi->fd, PIOCSET, &pr_flags);
+ }
+#else
+#ifdef PIOCSFORK /* Original method */
+ ioctl (pi->fd, PIOCSFORK, NULL);
+#endif
+#endif
+}
+#endif /* SYS_sproc */
+
+/* Fork an inferior process, and start debugging it with /proc. */
+
+static void
+procfs_create_inferior (exec_file, allargs, env)
+ char *exec_file;
+ char *allargs;
+ char **env;
+{
+ char *shell_file = getenv ("SHELL");
+ char *tryname;
+ if (shell_file != NULL && strchr (shell_file, '/') == NULL)
+ {
+
+ /* We will be looking down the PATH to find shell_file. If we
+ just do this the normal way (via execlp, which operates by
+ attempting an exec for each element of the PATH until it
+ finds one which succeeds), then there will be an exec for
+ each failed attempt, each of which will cause a PR_SYSEXIT
+ stop, and we won't know how to distinguish the PR_SYSEXIT's
+ for these failed execs with the ones for successful execs
+ (whether the exec has succeeded is stored at that time in the
+ carry bit or some such architecture-specific and
+ non-ABI-specified place).
+
+ So I can't think of anything better than to search the PATH
+ now. This has several disadvantages: (1) There is a race
+ condition; if we find a file now and it is deleted before we
+ exec it, we lose, even if the deletion leaves a valid file
+ further down in the PATH, (2) there is no way to know exactly
+ what an executable (in the sense of "capable of being
+ exec'd") file is. Using access() loses because it may lose
+ if the caller is the superuser; failing to use it loses if
+ there are ACLs or some such. */
+
+ char *p;
+ char *p1;
+ /* FIXME-maybe: might want "set path" command so user can change what
+ path is used from within GDB. */
+ char *path = getenv ("PATH");
+ int len;
+ struct stat statbuf;
+
+ if (path == NULL)
+ path = "/bin:/usr/bin";
+
+ tryname = alloca (strlen (path) + strlen (shell_file) + 2);
+ for (p = path; p != NULL; p = p1 ? p1 + 1: NULL)
+ {
+ p1 = strchr (p, ':');
+ if (p1 != NULL)
+ len = p1 - p;
+ else
+ len = strlen (p);
+ strncpy (tryname, p, len);
+ tryname[len] = '\0';
+ strcat (tryname, "/");
+ strcat (tryname, shell_file);
+ if (access (tryname, X_OK) < 0)
+ continue;
+ if (stat (tryname, &statbuf) < 0)
+ continue;
+ if (!S_ISREG (statbuf.st_mode))
+ /* We certainly need to reject directories. I'm not quite
+ as sure about FIFOs, sockets, etc., but I kind of doubt
+ that people want to exec() these things. */
+ continue;
+ break;
+ }
+ if (p == NULL)
+ /* Not found. This must be an error rather than merely passing
+ the file to execlp(), because execlp() would try all the
+ exec()s, causing GDB to get confused. */
+ error ("Can't find shell %s in PATH", shell_file);
+
+ shell_file = tryname;
+ }
+
+ fork_inferior (exec_file, allargs, env,
+ proc_set_exec_trap, procfs_init_inferior, shell_file);
+
+ /* We are at the first instruction we care about. */
+ /* Pedal to the metal... */
+
+ /* Setup traps on exit from sproc() */
+
+#ifdef SYS_sproc
+ procfs_set_sproc_trap (current_procinfo);
+#endif
+
+ proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0);
+}
+
+/* Clean up after the inferior dies. */
+
+static void
+procfs_mourn_inferior ()
+{
+ struct procinfo *pi;
+ struct procinfo *next_pi;
+
+ for (pi = procinfo_list; pi; pi = next_pi)
+ {
+ next_pi = pi->next;
+ unconditionally_kill_inferior (pi);
+ }
+
+ unpush_target (&procfs_ops);
+ generic_mourn_inferior ();
+}
+
+
+/* Mark our target-struct as eligible for stray "run" and "attach" commands. */
+static int
+procfs_can_run ()
+{
+ return(1);
+}
+#ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
+\f
+/* Insert a watchpoint */
+int
+procfs_set_watchpoint(pid, addr, len, rw)
+ int pid;
+ CORE_ADDR addr;
+ int len;
+ int rw;
+{
+ struct procinfo *pi;
+ prwatch_t wpt;
+
+ pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
+ wpt.pr_vaddr = (caddr_t)addr;
+ wpt.pr_size = len;
+ wpt.pr_wflags = ((rw & 1) ? MA_READ : 0) | ((rw & 2) ? MA_WRITE : 0);
+ if (ioctl (pi->fd, PIOCSWATCH, &wpt) < 0)
+ {
+ if (errno == E2BIG)
+ return -1;
+ /* Currently it sometimes happens that the same watchpoint gets
+ deleted twice - don't die in this case (FIXME please) */
+ if (errno == ESRCH && len == 0)
+ return 0;
+ print_sys_errmsg (pi->pathname, errno);
+ error ("PIOCSWATCH failed");
+ }
+ return 0;
+}
+
+int
+procfs_stopped_by_watchpoint(pid)
+ int pid;
+{
+ struct procinfo *pi;
+ short what;
+ short why;
+
+ pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
+ if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
+ {
+ why = pi->prstatus.pr_why;
+ what = pi->prstatus.pr_what;
+ if (why == PR_FAULTED
+#if defined (FLTWATCH) && defined (FLTKWATCH)
+ && (what == FLTWATCH) || (what == FLTKWATCH)
+#else
+#ifdef FLTWATCH
+ && (what == FLTWATCH)
+#endif
+#ifdef FLTKWATCH
+ && (what == FLTKWATCH)
+#endif
+#endif
+ )
+ return what;
+ }
+ return 0;
+}
+#endif
+
+/* Send a SIGINT to the process group. This acts just like the user typed a
+ ^C on the controlling terminal.
+
+ XXX - This may not be correct for all systems. Some may want to use
+ killpg() instead of kill (-pgrp). */
void
-_initialize_proc_fs ()
+procfs_stop ()
{
- add_info ("proc", proc_info, proc_desc);
+ extern pid_t inferior_process_group;
+
+ kill (-inferior_process_group, SIGINT);
}
-#endif /* USE_PROC_FS */
+\f
+struct target_ops procfs_ops = {
+ "procfs", /* to_shortname */
+ "Unix /proc child process", /* to_longname */
+ "Unix /proc child process (started by the \"run\" command).", /* to_doc */
+ procfs_open, /* to_open */
+ 0, /* to_close */
+ procfs_attach, /* to_attach */
+ procfs_detach, /* to_detach */
+ procfs_resume, /* to_resume */
+ procfs_wait, /* to_wait */
+ procfs_fetch_registers, /* to_fetch_registers */
+ procfs_store_registers, /* to_store_registers */
+ procfs_prepare_to_store, /* to_prepare_to_store */
+ procfs_xfer_memory, /* to_xfer_memory */
+ procfs_files_info, /* to_files_info */
+ memory_insert_breakpoint, /* to_insert_breakpoint */
+ memory_remove_breakpoint, /* to_remove_breakpoint */
+ terminal_init_inferior, /* to_terminal_init */
+ terminal_inferior, /* to_terminal_inferior */
+ terminal_ours_for_output, /* to_terminal_ours_for_output */
+ terminal_ours, /* to_terminal_ours */
+ child_terminal_info, /* to_terminal_info */
+ procfs_kill_inferior, /* to_kill */
+ 0, /* to_load */
+ 0, /* to_lookup_symbol */
+ procfs_create_inferior, /* to_create_inferior */
+ procfs_mourn_inferior, /* to_mourn_inferior */
+ procfs_can_run, /* to_can_run */
+ procfs_notice_signals, /* to_notice_signals */
+ 0 /* to_thread_alive */
+ procfs_stop, /* to_stop */
+ process_stratum, /* to_stratum */
+ 0, /* to_next */
+ 1, /* to_has_all_memory */
+ 1, /* to_has_memory */
+ 1, /* to_has_stack */
+ 1, /* to_has_registers */
+ 1, /* to_has_execution */
+ 0, /* sections */
+ 0, /* sections_end */
+ OPS_MAGIC /* to_magic */
+};
+
+void
+_initialize_procfs ()
+{
+#ifdef HAVE_OPTIONAL_PROC_FS
+ char procname[32];
+ int fd;
+
+ /* If we have an optional /proc filesystem (e.g. under OSF/1),
+ don't add procfs support if we cannot access the running
+ GDB via /proc. */
+ sprintf (procname, PROC_NAME_FMT, getpid ());
+ if ((fd = open (procname, O_RDONLY)) < 0)
+ return;
+ close (fd);
+#endif
+
+ add_target (&procfs_ops);
+
+ add_info ("proc", info_proc,
+"Show process status information using /proc entry.\n\
+Specify process id or use current inferior by default.\n\
+Specify keywords for detailed information; default is summary.\n\
+Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
+`status', `syscalls', and `times'.\n\
+Unambiguous abbreviations may be used.");
+
+ init_syscall_table ();
+}
projects / deliverable / binutils-gdb.git / blobdiff