/* Machine independent support for SVR4 /proc (process file system) for GDB.
- Copyright (C) 1991 Free Software Foundation, Inc.
+ Copyright 1991, 1992 Free Software Foundation, Inc.
Written by Fred Fish at Cygnus Support.
This file is part of GDB.
#include "defs.h"
-#ifdef USE_PROC_FS /* Entire file goes away if not using /proc */
-
#include <time.h>
#include <sys/procfs.h>
#include <fcntl.h>
#include <errno.h>
+#include <string.h>
+#include <stropts.h>
+#include <poll.h>
#include "inferior.h"
#include "target.h"
+#include "command.h"
+#include "gdbcore.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 */
+};
+
+/* List of inferior process information */
+static struct procinfo *procinfo_list = NULL;
+
+static struct pollfd *poll_list; /* pollfds used for waiting on /proc */
+
+static int num_poll_list = 0; /* Number of entries in poll_list */
+
+static int last_resume_pid = -1; /* Last pid used with procfs_resume */
+
+/* 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. */
+
+struct trans {
+ int value; /* The numeric value */
+ char *name; /* The equivalent symbolic value */
+ char *desc; /* Short description of value */
+};
+
+/* Translate bits in the pr_flags member of the prstatus structure, into the
+ names and desc information. */
+
+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
+};
+
+/* Translate values in the pr_why field of the prstatus struct. */
+
+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
+};
+
+/* Hardware fault translation table. */
+
+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
+};
+
+/* Translation table for signal generation information. See UNIX System
+ V Release 4 Programmer's Reference Manual, siginfo(5). */
+
+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
};
-static struct procinfo pi; /* Inferior's process information */
+static char *syscall_table[MAX_SYSCALLS];
/* Prototypes for local functions */
static void
set_proc_siginfo PARAMS ((struct procinfo *, int));
+static void
+init_syscall_table PARAMS ((void));
+
+static char *
+syscallname PARAMS ((int));
+
+static char *
+signalname PARAMS ((int));
+
+static char *
+errnoname PARAMS ((int));
+
static int
-proc_address_to_fd PARAMS ((CORE_ADDR, int));
+proc_address_to_fd PARAMS ((struct procinfo *, CORE_ADDR, int));
static int
-open_proc_file PARAMS ((int, struct procinfo *));
+open_proc_file PARAMS ((int, struct procinfo *, int));
static void
close_proc_file PARAMS ((struct procinfo *));
static void
-unconditionally_kill_inferior PARAMS ((void));
+unconditionally_kill_inferior PARAMS ((struct procinfo *));
+
+static NORETURN void
+proc_init_failed PARAMS ((struct procinfo *, char *));
+
+static void
+info_proc PARAMS ((char *, int));
+
+static void
+info_proc_flags PARAMS ((struct procinfo *, int));
+
+static void
+info_proc_stop PARAMS ((struct procinfo *, int));
+
+static void
+info_proc_siginfo PARAMS ((struct procinfo *, int));
+
+static void
+info_proc_syscalls PARAMS ((struct procinfo *, int));
static void
-proc_init_failed PARAMS ((char *));
+info_proc_mappings PARAMS ((struct procinfo *, int));
static void
-proc_info PARAMS ((char *, int));
+info_proc_signals PARAMS ((struct procinfo *, int));
static void
-proc_info_address_map PARAMS ((struct procinfo *, int));
+info_proc_faults PARAMS ((struct procinfo *, int));
static char *
mappingflags PARAMS ((long));
+static char *
+lookupname PARAMS ((struct trans *, unsigned int, char *));
+
+static char *
+lookupdesc PARAMS ((struct trans *, unsigned int));
+
+static int
+do_attach PARAMS ((int pid));
+
+static void
+do_detach PARAMS ((int siggnal));
+
+static void
+procfs_create_inferior PARAMS ((char *, char *, char **));
+
+static void
+procfs_notice_signals PARAMS ((int pid));
+
+static struct procinfo *
+find_procinfo PARAMS ((pid_t pid, int okfail));
+
/* External function prototypes that can't be easily included in any
header file because the args are typedefs in system include files. */
extern void
fill_fpregset PARAMS ((fpregset_t *, int));
-
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
- ptrace -- override library version to force errors for /proc version
+ find_procinfo -- convert a process id to a struct procinfo
SYNOPSIS
- int ptrace (int request, int pid, int arg3, int arg4)
+ 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;
+ */
- 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.
-*/
-
-int
-ptrace (request, pid, arg3, arg4)
- int request;
- int pid;
- int arg3;
- int arg4;
+static struct procinfo *
+find_procinfo (pid, okfail)
+ pid_t pid;
+ int okfail;
{
- error ("internal error - there is a call to ptrace() somewhere");
- /*NOTREACHED*/
+ struct procinfo *procinfo;
+
+ for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
+ if (procinfo->pid == pid)
+ return procinfo;
+
+ if (okfail)
+ return NULL;
+
+ error ("procfs (find_procinfo): Couldn't locate pid %d", pid);
}
/*
-GLOBAL FUNCTION
+LOCAL MACRO
- kill_inferior_fast -- kill inferior while gdb is exiting
+ current_procinfo -- convert inferior_pid to a struct procinfo
SYNOPSIS
- void kill_inferior_fast (void)
+ 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.
+ */
- This is used when GDB is exiting. It gives less chance of error.
-
-NOTES
-
- 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.
-
-*/
-
-void
-kill_inferior_fast ()
-{
- if (inferior_pid != 0 && !attach_flag)
- {
- unconditionally_kill_inferior ();
- }
-}
+#define current_procinfo find_procinfo (inferior_pid, 0)
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
- kill_inferior - kill any currently inferior
+ add_fd -- Add the fd to the poll/select list
SYNOPSIS
- void kill_inferior (void)
+ static void add_fd (struct procinfo *);
DESCRIPTION
+
+ Add the fd of the supplied procinfo to the list of fds used for
+ poll/select operations.
+ */
- 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
+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;
-*/
+ num_poll_list++;
+}
-void
-kill_inferior ()
+static void
+remove_fd (pi)
+ struct procinfo *pi;
{
- if (inferior_pid != 0)
+ int i;
+
+ for (i = 0; i < num_poll_list; i++)
{
- unconditionally_kill_inferior ();
- target_mourn_inferior ();
+ if (poll_list[i].fd == pi->fd)
+ {
+ 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;
+ }
}
}
-/*
-
-LOCAL FUNCTION
-
- unconditionally_kill_inferior - terminate the inferior
+#define LOSING_POLL unixware_sux
-SYNOPSIS
+static struct procinfo *
+wait_fd ()
+{
+ struct procinfo *pi;
+ int num_fds;
+ int i;
- static void unconditionally_kill_inferior (void)
+ if (attach_flag)
+ set_sigint_trap (); /* Causes SIGINT to be passed on to the
+ attached process. */
-DESCRIPTION
+#ifndef LOSING_POLL
+ num_fds = poll (poll_list, num_poll_list, -1);
+#else
+ pi = current_procinfo;
- Kill the current inferior. Should not be called until it
- is at least tested that there is an inferior.
+ if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ error ("PIOCWSTOP failed");
+ }
+ pi->had_event = 1;
+#endif
+
+ if (attach_flag)
+ clear_sigint_trap();
-NOTE
+#ifndef LOSING_POLL
- 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.
+ if (num_fds <= 0)
+ {
+ print_sys_errmsg ("poll failed\n", errno);
+ error ("Poll failed, returned %d", num_fds);
+ }
-*/
+ 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 */
-static void
-unconditionally_kill_inferior ()
-{
- int signo;
-
- signo = SIGKILL;
- (void) ioctl (pi.fd, PIOCKILL, &signo);
- close_proc_file (&pi);
- wait ((int *) 0);
+ return pi;
}
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
- child_xfer_memory -- copy data to or from inferior memory space
+ lookupdesc -- translate a value to a summary desc string
SYNOPSIS
- int child_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
- int dowrite, struct target_ops target)
+ static char *lookupdesc (struct trans *transp, unsigned int val);
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 child_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.
+
+ Given a pointer to a translation table and a value to be translated,
+ lookup the desc string and return it.
*/
-
-int
-child_xfer_memory (memaddr, myaddr, len, dowrite, target)
- CORE_ADDR memaddr;
- char *myaddr;
- int len;
- int dowrite;
- struct target_ops *target; /* ignored */
+static char *
+lookupdesc (transp, val)
+ struct trans *transp;
+ unsigned int val;
{
- int nbytes = 0;
-
- if (lseek (pi.fd, (off_t) memaddr, 0) == (off_t) memaddr)
+ char *desc;
+
+ for (desc = NULL; transp -> name != NULL; transp++)
{
- if (dowrite)
+ if (transp -> value == val)
{
- nbytes = write (pi.fd, myaddr, len);
- }
- else
- {
- nbytes = read (pi.fd, myaddr, len);
- }
- if (nbytes < 0)
- {
- nbytes = 0;
+ desc = transp -> desc;
+ break;
}
}
- return (nbytes);
+
+ /* Didn't find a translation for the specified value, set a default one. */
+
+ if (desc == NULL)
+ {
+ desc = "Unknown";
+ }
+ return (desc);
}
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
- store_inferior_registers -- copy register values back to inferior
+ lookupname -- translate a value to symbolic name
SYNOPSIS
- void store_inferior_registers (int regno)
+ 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.
+ */
- Store our current register values back into the inferior. If
+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
+}
+
+/*
+
+GLOBAL FUNCTION
+
+ ptrace -- override library version to force errors for /proc version
+
+SYNOPSIS
+
+ int ptrace (int request, int pid, PTRACE_ARG3_TYPE arg3, int arg4)
+
+DESCRIPTION
+
+ 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.
+*/
+
+int
+ptrace (request, pid, arg3, arg4)
+ int request;
+ int pid;
+ PTRACE_ARG3_TYPE arg3;
+ int arg4;
+{
+ error ("internal error - there is a call to ptrace() somewhere");
+ /*NOTREACHED*/
+}
+
+/*
+
+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;
+ ioctl (pi->fd, PIOCKILL, &signo);
+ 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.
*/
-void
-store_inferior_registers (regno)
+static void
+procfs_store_registers (regno)
int regno;
{
+ struct procinfo *pi;
+
+ pi = current_procinfo;
+
if (regno != -1)
{
- (void) ioctl (pi.fd, PIOCGREG, &pi.gregset);
+ ioctl (pi->fd, PIOCGREG, &pi->gregset);
}
- fill_gregset (&pi.gregset, regno);
- (void) ioctl (pi.fd, PIOCSREG, &pi.gregset);
+ fill_gregset (&pi->gregset, regno);
+ ioctl (pi->fd, PIOCSREG, &pi->gregset);
#if defined (FP0_REGNUM)
if (regno != -1)
{
- (void) ioctl (pi.fd, PIOCGFPREG, &pi.fpregset);
+ ioctl (pi->fd, PIOCGFPREG, &pi->fpregset);
}
- fill_fpregset (&pi.fpregset, regno);
- (void) ioctl (pi.fd, PIOCSFPREG, &pi.fpregset);
+ fill_fpregset (&pi->fpregset, regno);
+ ioctl (pi->fd, PIOCSFPREG, &pi->fpregset);
#endif /* FP0_REGNUM */
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
- inferior_proc_init - initialize access to a /proc entry
+ create_procinfo - initialize access to a /proc entry
SYNOPSIS
- void inferior_proc_init (int pid)
+ void create_procinfo (int pid)
+
+DESCRIPTION
+
+ Allocate a procinfo structure, open the /proc file and then sets up
+ the set of signals and faults that are to be traced.
+
+NOTES
+
+ If proc_init_failed ever gets called, control returns to the command
+ processing loop via the standard error handling code.
+
+ */
+
+static void
+create_procinfo (pid)
+ int pid;
+{
+ struct procinfo *pi;
+
+ if (find_procinfo (pid, 1))
+ return; /* 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);
+
+ 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");
+}
+
+/*
+
+LOCAL FUNCTION
+
+ procfs_init_inferior - initialize target vector and access to a
+ /proc entry
+
+SYNOPSIS
+
+ void procfs_init_inferior (int pid)
DESCRIPTION
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 */
+
+ /* One trap to exec the shell, one to exec the program being debugged. */
+ startup_inferior (2);
+}
+
+/*
+
+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)
- {
- proc_init_failed ("PIOCWSTOP failed");
- }
- else if (ioctl (pi.fd, PIOCSTRACE, &pi.prrun.pr_trace) < 0)
+ if (signal_stop_state (signo) == 0 &&
+ signal_print_state (signo) == 0 &&
+ signal_pass_state (signo) == 1)
{
- proc_init_failed ("PIOCSTRACE failed");
+ prdelset (&pi->prrun.pr_trace, signo);
}
- 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);
+
+ /* 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. */
-/*
- * 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
praddset (&exitset, SYS_execve);
#endif
#ifdef SYS_execv
- praddset(&exitset, SYS_execv);
+ praddset (&exitset, SYS_execv);
#endif
if (ioctl (fd, PIOCSEXIT, &exitset) < 0)
{
perror (procname);
- fflush (stderr);
+ gdb_flush (gdb_stderr);
_exit (127);
}
+
+ 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;
+
+ pi = current_procinfo;
- if (pi.valid && (ioctl (pi.fd, PIOCNMAP, &nmap) == 0))
+ 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;
+
+ pi = current_procinfo;
- if (pi.valid && (ioctl (pi.fd, PIOCNMAP, &nmap) == 0))
+ 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);
+ 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)
{
- set_proc_siginfo (&pi, signal);
+ set_proc_siginfo (pi, signal);
}
- if (ioctl (pi.fd, PIOCSEXIT, &pi.exitset) < 0)
+ if (ioctl (pi->fd, PIOCSEXIT, &pi->saved_exitset) < 0)
{
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCSEXIT failed.\n");
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCSEXIT failed.\n");
}
- if (ioctl (pi.fd, PIOCSENTRY, &pi.entryset) < 0)
+ if (ioctl (pi->fd, PIOCSENTRY, &pi->saved_entryset) < 0)
{
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCSENTRY failed.\n");
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCSENTRY failed.\n");
}
- if (ioctl (pi.fd, PIOCSTRACE, &pi.trace) < 0)
+ if (ioctl (pi->fd, PIOCSTRACE, &pi->saved_trace) < 0)
{
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCSTRACE failed.\n");
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCSTRACE failed.\n");
}
- if (ioctl (pi.fd, PIOCSFAULT, &pi.fltset) < 0)
+ if (ioctl (pi->fd, PIOCSHOLD, &pi->saved_sighold) < 0)
{
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCSFAULT failed.\n");
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOSCHOLD failed.\n");
}
- if (ioctl (pi.fd, PIOCSTATUS, &pi.prstatus) < 0)
+ if (ioctl (pi->fd, PIOCSFAULT, &pi->saved_fltset) < 0)
{
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCSTATUS failed.\n");
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCSFAULT failed.\n");
+ }
+ if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
+ {
+ 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 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
+LOCAL FUNCTION
+
+ procfs_wait -- emulate wait() as much as possible
+ Wait for child to do something. Return pid of child, or -1 in case
+ of error; store status through argument pointer STATUS.
- proc_wait -- emulate wait() as much as possible
SYNOPSIS
- int proc_wait (int *statloc)
+ int procfs_wait (int pid, int *statloc)
DESCRIPTION
*/
-int
-proc_wait (statloc)
+static int
+procfs_wait (pid, statloc)
+ int pid;
int *statloc;
{
short what;
int statval = 0;
int checkerr = 0;
int rtnval = -1;
-
- if (ioctl (pi.fd, PIOCSTATUS, &pi.prstatus) < 0)
- {
- checkerr++;
- }
- else if (!(pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
+ 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;
+
+wait_again:
+
+ if (!pi)
+ pi = wait_fd ();
+
+ 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)
- &&
- (
+ 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
- what == SYS_exec
-#else
- 0 == 0
+ case SYS_exec:
#endif
#ifdef SYS_execve
- || what == SYS_execve
+ case SYS_execve:
#endif
#ifdef SYS_execv
- || what == SYS_execv
+ case SYS_execv:
#endif
- ))
- {
- statval = (SIGTRAP << 8) | 0177;
- }
- else if (why == PR_REQUESTED)
- {
+ 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;
+#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)
{
case FLTPRIV:
break;
case FLTPAGE: /* Recoverable page fault */
default:
- rtnval = -1;
error ("PIOCWSTOP, unknown why %d, what %d", why, what);
- /* NOTREACHED */
}
- }
- 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)
{
*statloc = statval;
}
+
+ if (rtnval == -1) /* No more children to wait for */
+ {
+ fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing.\n");
+ *statloc = 42; /* Claim it exited with signal 42 */
+ return rtnval;
+ }
+
+ pi->had_event = 0; /* Indicate that we've seen this one */
return (rtnval);
}
static void
set_proc_siginfo (pip, signo)
- struct procinfo *pip;
- int signo;
+ struct procinfo *pip;
+ int signo;
{
struct siginfo newsiginfo;
struct siginfo *sip;
- if (pip -> valid)
+ if (signo == pip -> prstatus.pr_info.si_signo)
{
- if (signo == pip -> prstatus.pr_info.si_signo)
- {
- sip = &pip -> prstatus.pr_info;
- }
- else
- {
- (void) 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");
- }
+ 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");
}
}
-/*
-
-GLOBAL FUNCTION
-
- child_resume -- resume execution of the inferior process
+/* Resume execution of process PID. If STEP is nozero, then
+ just single step it. If SIGNAL is nonzero, restart it with that
+ signal activated. */
-SYNOPSIS
-
- void child_resume (int step, int signal)
-
-DESCRIPTION
+static void
+procfs_resume (pid, step, signo)
+ int pid;
+ int step;
+ int signo;
+{
+ int signal_to_pass;
+ struct procinfo *pi, *procinfo;
- 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.
+ pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
-NOTE
+ errno = 0;
+ pi->prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT;
- It may not be absolutely necessary to specify the PC value for
+#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.
- */
+ current. FIXME: Investigate if this is necessary or not. */
-void
-child_resume (step, signal)
- int step;
- int signal;
-{
- errno = 0;
- pi.prrun.pr_flags = PRSVADDR | PRSTRACE | PRSFAULT | PRCFAULT;
- pi.prrun.pr_vaddr = (caddr_t) *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)];
- if (signal)
+#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 == SIGSTOP && 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 == SIGTSTP
+ && 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 = signo;
+
+ if (signal_to_pass)
{
- set_proc_siginfo (&pi, signal);
+ 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");
+}
-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_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 (which == 0)
+ if (pip -> prstatus.pr_flags & PR_STOPPED)
{
- if (core_reg_size != sizeof (pi.gregset))
+ printf_filtered ("%-32s", "Reason for stopping:");
+ if (!summary)
{
- warning ("wrong size gregset struct in core file");
+ printf_filtered ("\n\n");
}
- else
+ for (transp = pr_why_table; transp -> name != NULL; transp++)
{
- (void) memcpy ((char *) &pi.gregset, core_reg_sect,
- sizeof (pi.gregset));
- supply_gregset (&pi.gregset);
+ 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");
}
- else if (which == 2)
+}
+
+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))
{
- if (core_reg_size != sizeof (pi.fpregset))
+ printf_filtered ("%-32s", "Additional signal/fault info:");
+ sip = &pip -> prstatus.pr_info;
+ if (summary)
{
- warning ("wrong size fpregset struct in core file");
+ 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=%#x ", 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
{
- (void) memcpy ((char *) &pi.fpregset, core_reg_sect,
- sizeof (pi.fpregset));
-#if defined (FP0_REGNUM)
- supply_fpregset (&pi.fpregset);
-#endif
+ 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%-16#x %s.\n", sip -> si_addr,
+ "Address of faulting instruction");
+ }
+ else if ((sip -> si_signo == SIGSEGV) ||
+ (sip -> si_signo == SIGBUS))
+ {
+ printf_filtered ("\t%-16#x %s.\n", 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");
}
}
-/*
-
-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;
+info_proc_syscalls (pip, summary)
+ struct procinfo *pip;
+ int summary;
{
- 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)
+ int syscallnum;
-DESCRIPTION
+ if (!summary)
+ {
- 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.
+#if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
+ if (pip -> prstatus.pr_flags & PR_ASLEEP)
+ {
+ 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));
+ }
+ }
+#endif
- */
+ if (ioctl (pip -> fd, PIOCGENTRY, &pip -> entryset) < 0)
+ {
+ print_sys_errmsg (pip -> pathname, errno);
+ error ("PIOCGENTRY failed");
+ }
+
+ if (ioctl (pip -> fd, PIOCGEXIT, &pip -> exitset) < 0)
+ {
+ print_sys_errmsg (pip -> pathname, errno);
+ error ("PIOCGEXIT failed");
+ }
+
+ 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++)
+ {
+ 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");
+ }
+}
-static void
-close_proc_file (pip)
- struct procinfo *pip;
+static char *
+signalname (signo)
+ int signo;
{
- pip -> pid = 0;
- if (pip -> valid)
+ char *name;
+ static char locbuf[32];
+
+ 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)
+ 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)
- {
- long pr_flags;
+ return (locbuf);
+}
- pip -> valid = 1;
- pip -> pid = pid;
- pr_flags = PR_FORK;
- (void) ioctl (pip -> fd, PIOCRESET, &pr_flags);
+static void
+info_proc_signals (pip, summary)
+ struct procinfo *pip;
+ int summary;
+{
+ int signo;
+
+ if (!summary)
+ {
+ 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");
+ printf_filtered ("%-8s ",
+ prismember (&pip -> prstatus.pr_sigpend, signo)
+ ? "yes" : "no");
+ 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");
+ printf_filtered ("\t%10s %10s %10s %10s %7s\n",
+ "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)
+ {
+ printf_filtered ("\t%#10x %#10x %#10x %#10x %7s\n",
+ prmap -> pr_vaddr,
+ 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 exec'd child stop on sproc
SYNOPSIS
- void _initialize_proc_fs (void)
+ void procfs_set_sproc_trap (void)
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 child
+ 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.
+ */
-static char *proc_desc =
-"Show current process status information using /proc entry.\n\
-With no arguments, prints short form. With 'verbose' prints long form.";
+#ifdef SYS_sproc
-void
-_initialize_proc_fs ()
+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);
+
+ if (ioctl (pi->fd, PIOCSEXIT, &exitset) < 0)
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ error ("PIOCSEXIT failed");
+ }
+
+ /* 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;
+{
+ fork_inferior (exec_file, allargs, env,
+ proc_set_exec_trap, procfs_init_inferior);
+ /* 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, 0, 0);
+}
+
+/* Clean up after the inferior dies. */
+
+static void
+procfs_mourn_inferior ()
+{
+ struct procinfo *pi;
+
+ for (pi = procinfo_list; pi; 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 ()
{
- add_info ("proc", proc_info, proc_desc);
+ return(1);
}
+\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 */
+ 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 ()
+{
+ add_target (&procfs_ops);
-#endif /* USE_PROC_FS */
+ 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