/* 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 "inferior.h"
#include "target.h"
-#include "signame.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
int fd; /* File descriptor for /proc entry */
char *pathname; /* Pathname to /proc entry */
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 */
0, 0, NULL, NULL
};
-/* Translation table for errno values. See intro(2) in most UNIX systems
- Programmers Reference Manuals.
-
- Note that some systems provide a function (strerror) that returns the
- error message string, or a global variable that is the base address of the
- array of character pointers. Perhaps we should try to make use of these
- provided strings if they are present, but at least this is more portable.
- (FIXME?) */
-
-static struct trans errno_table[] =
-{
-#if defined (EPERM)
- EPERM, "EPERM", "Not super-user",
-#endif
-#if defined (ENOENT)
- ENOENT, "ENOENT", "No such file or directory",
-#endif
-#if defined (ESRCH)
- ESRCH, "ESRCH", "No such process",
-#endif
-#if defined (EINTR)
- EINTR, "EINTR", "Interrupted system call",
-#endif
-#if defined (EIO)
- EIO, "EIO", "I/O error",
-#endif
-#if defined (ENXIO)
- ENXIO, "ENXIO", "No such device or address",
-#endif
-#if defined (E2BIG)
- E2BIG, "E2BIG", "Arg list too long",
-#endif
-#if defined (ENOEXEC)
- ENOEXEC, "ENOEXEC", "Exec format error",
-#endif
-#if defined (EBADF)
- EBADF, "EBADF", "Bad file number",
-#endif
-#if defined (ECHILD)
- ECHILD, "ECHILD", "No child process",
-#endif
-#if defined (EAGAIN)
- EAGAIN, "EAGAIN", "No more processes",
-#endif
-#if defined (ENOMEM)
- ENOMEM, "ENOMEM", "Not enough space",
-#endif
-#if defined (EACCES)
- EACCES, "EACCES", "Permission denied",
-#endif
-#if defined (EFAULT)
- EFAULT, "EFAULT", "Bad address",
-#endif
-#if defined (ENOTBLK)
- ENOTBLK, "ENOTBLK", "Block device required",
-#endif
-#if defined (EBUSY)
- EBUSY, "EBUSY", "Device busy",
-#endif
-#if defined (EEXIST)
- EEXIST, "EEXIST", "File exists",
-#endif
-#if defined (EXDEV)
- EXDEV, "EXDEV", "Cross-device link",
-#endif
-#if defined (ENODEV)
- ENODEV, "ENODEV", "No such device",
-#endif
-#if defined (ENOTDIR)
- ENOTDIR, "ENOTDIR", "Not a directory",
-#endif
-#if defined (EISDIR)
- EISDIR, "EISDIR", "Is a directory",
-#endif
-#if defined (EINVAL)
- EINVAL, "EINVAL", "Invalid argument",
-#endif
-#if defined (ENFILE)
- ENFILE, "ENFILE", "File table overflow",
-#endif
-#if defined (EMFILE)
- EMFILE, "EMFILE", "Too many open files",
-#endif
-#if defined (ENOTTY)
- ENOTTY, "ENOTTY", "Not a typewriter",
-#endif
-#if defined (ETXTBSY)
- ETXTBSY, "ETXTBSY", "Text file busy",
-#endif
-#if defined (EFBIG)
- EFBIG, "EFBIG", "File too large",
-#endif
-#if defined (ENOSPC)
- ENOSPC, "ENOSPC", "No space left on device",
-#endif
-#if defined (ESPIPE)
- ESPIPE, "ESPIPE", "Illegal seek",
-#endif
-#if defined (EROFS)
- EROFS, "EROFS", "Read only file system",
-#endif
-#if defined (EMLINK)
- EMLINK, "EMLINK", "Too many links",
-#endif
-#if defined (EPIPE)
- EPIPE, "EPIPE", "Broken pipe",
-#endif
-#if defined (EDOM)
- EDOM, "EDOM", "Math argument out of domain of func",
-#endif
-#if defined (ERANGE)
- ERANGE, "ERANGE", "Math result not representable",
-#endif
-#if defined (ENOMSG)
- ENOMSG, "ENOMSG", "No message of desired type",
-#endif
-#if defined (EIDRM)
- EIDRM, "EIDRM", "Identifier removed",
-#endif
-#if defined (ECHRNG)
- ECHRNG, "ECHRNG", "Channel number out of range",
-#endif
-#if defined (EL2NSYNC)
- EL2NSYNC, "EL2NSYNC", "Level 2 not synchronized",
-#endif
-#if defined (EL3HLT)
- EL3HLT, "EL3HLT", "Level 3 halted",
-#endif
-#if defined (EL3RST)
- EL3RST, "EL3RST", "Level 3 reset",
-#endif
-#if defined (ELNRNG)
- ELNRNG, "ELNRNG", "Link number out of range",
-#endif
-#if defined (EUNATCH)
- EUNATCH, "EUNATCH", "Protocol driver not attached",
-#endif
-#if defined (ENOCSI)
- ENOCSI, "ENOCSI", "No CSI structure available",
-#endif
-#if defined (EL2HLT)
- EL2HLT, "EL2HLT", "Level 2 halted",
-#endif
-#if defined (EDEADLK)
- EDEADLK, "EDEADLK", "Deadlock condition",
-#endif
-#if defined (ENOLCK)
- ENOLCK, "ENOLCK", "No record locks available",
-#endif
-#if defined (EBADE)
- EBADE, "EBADE", "Invalid exchange",
-#endif
-#if defined (EBADR)
- EBADR, "EBADR", "Invalid request descriptor",
-#endif
-#if defined (EXFULL)
- EXFULL, "EXFULL", "Exchange full",
-#endif
-#if defined (ENOANO)
- ENOANO, "ENOANO", "No anode",
-#endif
-#if defined (EBADRQC)
- EBADRQC, "EBADRQC", "Invalid request code",
-#endif
-#if defined (EBADSLT)
- EBADSLT, "EBADSLT", "Invalid slot",
-#endif
-#if defined (EDEADLOCK)
- EDEADLOCK, "EDEADLOCK", "File locking deadlock error",
-#endif
-#if defined (EBFONT)
- EBFONT, "EBFONT", "Bad font file fmt",
-#endif
-#if defined (ENOSTR)
- ENOSTR, "ENOSTR", "Device not a stream",
-#endif
-#if defined (ENODATA)
- ENODATA, "ENODATA", "No data available",
-#endif
-#if defined (ETIME)
- ETIME, "ETIME", "Timer expired",
-#endif
-#if defined (ENOSR)
- ENOSR, "ENOSR", "Out of streams resources",
-#endif
-#if defined (ENONET)
- ENONET, "ENONET", "Machine is not on the network",
-#endif
-#if defined (ENOPKG)
- ENOPKG, "ENOPKG", "Package not installed",
-#endif
-#if defined (EREMOTE)
- EREMOTE, "EREMOTE", "Object is remote",
-#endif
-#if defined (ENOLINK)
- ENOLINK, "ENOLINK", "Link has been severed",
-#endif
-#if defined (EADV)
- EADV, "EADV", "Advertise error",
-#endif
-#if defined (ESRMNT)
- ESRMNT, "ESRMNT", "Srmount error",
-#endif
-#if defined (ECOMM)
- ECOMM, "ECOMM", "Communication error on send",
-#endif
-#if defined (EPROTO)
- EPROTO, "EPROTO", "Protocol error",
-#endif
-#if defined (EMULTIHOP)
- EMULTIHOP, "EMULTIHOP", "Multihop attempted",
-#endif
-#if defined (EDOTDOT)
- EDOTDOT, "EDOTDOT", "RFS specific error",
-#endif
-#if defined (EBADMSG)
- EBADMSG, "EBADMSG", "Not a data message",
-#endif
-#if defined (ENAMETOOLONG)
- ENAMETOOLONG, "ENAMETOOLONG", "File name too long",
-#endif
-#if defined (EOVERFLOW)
- EOVERFLOW, "EOVERFLOW", "Value too large for defined data type",
-#endif
-#if defined (ENOTUNIQ)
- ENOTUNIQ, "ENOTUNIQ", "Name not unique on network",
-#endif
-#if defined (EBADFD)
- EBADFD, "EBADFD", "File descriptor in bad state",
-#endif
-#if defined (EREMCHG)
- EREMCHG, "EREMCHG", "Remote address changed",
-#endif
-#if defined (ELIBACC)
- ELIBACC, "ELIBACC", "Cannot access a needed shared library",
-#endif
-#if defined (ELIBBAD)
- ELIBBAD, "ELIBBAD", "Accessing a corrupted shared library",
-#endif
-#if defined (ELIBSCN)
- ELIBSCN, "ELIBSCN", ".lib section in a.out corrupted",
-#endif
-#if defined (ELIBMAX)
- ELIBMAX, "ELIBMAX", "Attempting to link in too many shared libraries",
-#endif
-#if defined (ELIBEXEC)
- ELIBEXEC, "ELIBEXEC", "Cannot exec a shared library directly",
-#endif
-#if defined (EILSEQ)
- EILSEQ, "EILSEQ", "Illegal byte sequence",
-#endif
-#if defined (ENOSYS)
- ENOSYS, "ENOSYS", "Operation not applicable",
-#endif
-#if defined (ELOOP)
- ELOOP, "ELOOP", "Too many symbolic links encountered",
-#endif
-#if defined (ERESTART)
- ERESTART, "ERESTART", "Interrupted system call should be restarted",
-#endif
-#if defined (ESTRPIPE)
- ESTRPIPE, "ESTRPIPE", "Streams pipe error",
-#endif
-#if defined (ENOTEMPTY)
- ENOTEMPTY, "ENOTEMPTY", "Directory not empty",
-#endif
-#if defined (EUSERS)
- EUSERS, "EUSERS", "Too many users",
-#endif
-#if defined (ENOTSOCK)
- ENOTSOCK, "ENOTSOCK", "Socket operation on non-socket",
-#endif
-#if defined (EDESTADDRREQ)
- EDESTADDRREQ, "EDESTADDRREQ", "Destination address required",
-#endif
-#if defined (EMSGSIZE)
- EMSGSIZE, "EMSGSIZE", "Message too long",
-#endif
-#if defined (EPROTOTYPE)
- EPROTOTYPE, "EPROTOTYPE", "Protocol wrong type for socket",
-#endif
-#if defined (ENOPROTOOPT)
- ENOPROTOOPT, "ENOPROTOOPT", "Protocol not available",
-#endif
-#if defined (EPROTONOSUPPORT)
- EPROTONOSUPPORT, "EPROTONOSUPPORT", "Protocol not supported",
-#endif
-#if defined (ESOCKTNOSUPPORT)
- ESOCKTNOSUPPORT, "ESOCKTNOSUPPORT", "Socket type not supported",
-#endif
-#if defined (EOPNOTSUPP)
- EOPNOTSUPP, "EOPNOTSUPP", "Operation not supported on transport endpoint ",
-#endif
-#if defined (EPFNOSUPPORT)
- EPFNOSUPPORT, "EPFNOSUPPORT", "Protocol family not supported",
-#endif
-#if defined (EAFNOSUPPORT)
- EAFNOSUPPORT, "EAFNOSUPPORT", "Address family not supported by protocol",
-#endif
-#if defined (EADDRINUSE)
- EADDRINUSE, "EADDRINUSE", "Address already in use",
-#endif
-#if defined (EADDRNOTAVAIL)
- EADDRNOTAVAIL, "EADDRNOTAVAIL","Cannot assign requested address",
-#endif
-#if defined (ENETDOWN)
- ENETDOWN, "ENETDOWN", "Network is down",
-#endif
-#if defined (ENETUNREACH)
- ENETUNREACH, "ENETUNREACH", "Network is unreachable",
-#endif
-#if defined (ENETRESET)
- ENETRESET, "ENETRESET", "Network dropped connection because of reset",
-#endif
-#if defined (ECONNABORTED)
- ECONNABORTED, "ECONNABORTED", "Software caused connection abort",
-#endif
-#if defined (ECONNRESET)
- ECONNRESET, "ECONNRESET", "Connection reset by peer",
-#endif
-#if defined (ENOBUFS)
- ENOBUFS, "ENOBUFS", "No buffer space available",
-#endif
-#if defined (EISCONN)
- EISCONN, "EISCONN", "Transport endpoint is already connected",
-#endif
-#if defined (ENOTCONN)
- ENOTCONN, "ENOTCONN", "Transport endpoint is not connected",
-#endif
-#if defined (ESHUTDOWN)
- ESHUTDOWN, "ESHUTDOWN", "Cannot send after transport endpoint shutdown",
-#endif
-#if defined (ETOOMANYREFS)
- ETOOMANYREFS, "ETOOMANYREFS", "Too many references: cannot splice",
-#endif
-#if defined (ETIMEDOUT)
- ETIMEDOUT, "ETIMEDOUT", "Connection timed out",
-#endif
-#if defined (ECONNREFUSED)
- ECONNREFUSED, "ECONNREFUSED", "Connection refused",
-#endif
-#if defined (EHOSTDOWN)
- EHOSTDOWN, "EHOSTDOWN", "Host is down",
-#endif
-#if defined (EHOSTUNREACH)
- EHOSTUNREACH, "EHOSTUNREACH", "No route to host",
-#endif
-#if defined (EWOULDBLOCK)
- EWOULDBLOCK, "EWOULDBLOCK", "Operation already in progress",
-#endif
-#if defined (EINPROGRESS)
- EINPROGRESS, "EINPROGRESS", "Operation now in progress",
-#endif
-#if defined (ESTALE)
- ESTALE, "ESTALE", "Stale NFS file handle",
-#endif
-#if defined (EUCLEAN)
- EUCLEAN, "EUCLEAN", "Structure needs cleaning",
-#endif
-#if defined (ENOTNAM)
- ENOTNAM, "ENOTNAM", "Not a XENIX named type file",
-#endif
-#if defined (ENAVAIL)
- ENAVAIL, "ENAVAIL", "No XENIX semaphores available",
-#endif
-#if defined (EISNAM)
- EISNAM, "EISNAM", "Is a named type file",
-#endif
-#if defined (EREMOTEIO)
- EREMOTEIO, "EREMOTEIO", "Remote I/O error",
-#endif
- 0, NULL, NULL
-};
-
static char *syscall_table[MAX_SYSCALLS];
/* Prototypes for local functions */
static char *
signalname PARAMS ((int));
+static char *
+errnoname PARAMS ((int));
+
static int
proc_address_to_fd PARAMS ((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 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 ((void));
+
/* External function prototypes that can't be easily included in any
header file because the args are typedefs in system include files. */
free (locbuf);
}
locbuf = xmalloc (strlen (prefix) + 16);
- (void) sprintf (locbuf, "%s %u", prefix, val);
+ sprintf (locbuf, "%s %u", prefix, val);
name = locbuf;
}
return (name);
}
if (name == NULL)
{
- (void) sprintf (locbuf, "sigcode %u", sip -> si_signo);
+ sprintf (locbuf, "sigcode %u", sip -> si_signo);
name = locbuf;
}
return (name);
}
-static char *sigcodedesc (sip)
+static char *
+sigcodedesc (sip)
siginfo_t *sip;
{
struct sigcode *scp;
}
else
{
- (void) sprintf (locbuf, "syscall %u", syscallnum);
+ sprintf (locbuf, "syscall %u", syscallnum);
rtnval = locbuf;
}
return (rtnval);
static void
init_syscall_table ()
{
- int syscallnum;
-
#if defined (SYS_exit)
syscall_table[SYS_exit] = "exit";
#endif
SYNOPSIS
- int ptrace (int request, int pid, int arg3, int arg4)
+ int ptrace (int request, int pid, PTRACE_ARG3_TYPE arg3, int arg4)
DESCRIPTION
ptrace (request, pid, arg3, arg4)
int request;
int pid;
- int arg3;
+ PTRACE_ARG3_TYPE arg3;
int arg4;
{
error ("internal error - there is a call to ptrace() somewhere");
/*
-GLOBAL FUNCTION
-
- kill_inferior_fast -- kill inferior while gdb is exiting
-
-SYNOPSIS
-
- void kill_inferior_fast (void)
-
-DESCRIPTION
-
- 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 ();
- }
-}
-
-/*
-
-GLOBAL FUNCTION
+LOCAL FUNCTION
- kill_inferior - kill any currently inferior
+ procfs_kill_inferior - kill any currently inferior
SYNOPSIS
- void kill_inferior (void)
+ void procfs_kill_inferior (void)
DESCRIPTION
*/
-void
-kill_inferior ()
+static void
+procfs_kill_inferior ()
{
if (inferior_pid != 0)
{
int signo;
signo = SIGKILL;
- (void) ioctl (pi.fd, PIOCKILL, &signo);
+ ioctl (pi.fd, PIOCKILL, &signo);
close_proc_file (&pi);
wait ((int *) 0);
}
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
- child_xfer_memory -- copy data to or from inferior memory space
+ procfs_xfer_memory -- copy data to or from inferior memory space
SYNOPSIS
- int child_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
+ int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
int dowrite, struct target_ops target)
DESCRIPTION
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
+ 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.
The /proc interface makes this an almost trivial task.
*/
-
-int
-child_xfer_memory (memaddr, myaddr, len, dowrite, target)
+static int
+procfs_xfer_memory (memaddr, myaddr, len, dowrite, target)
CORE_ADDR memaddr;
char *myaddr;
int len;
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
- store_inferior_registers -- copy register values back to inferior
+ procfs_store_registers -- copy register values back to inferior
SYNOPSIS
- void store_inferior_registers (int regno)
+ void procfs_store_registers (int regno)
DESCRIPTION
*/
-void
-store_inferior_registers (regno)
+static void
+procfs_store_registers (regno)
int regno;
{
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);
+ 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);
+ ioctl (pi.fd, PIOCSFPREG, &pi.fpregset);
#endif /* FP0_REGNUM */
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
- inferior_proc_init - initialize access to a /proc entry
+ procfs_init_inferior - initialize access to a /proc entry
SYNOPSIS
- void inferior_proc_init (int pid)
+ void procfs_init_inferior (int pid)
DESCRIPTION
*/
-void
-inferior_proc_init (pid)
+static void
+procfs_init_inferior (pid)
int pid;
{
- if (!open_proc_file (pid, &pi))
+
+ push_target (&procfs_ops);
+
+ if (!open_proc_file (pid, &pi, O_RDWR))
{
proc_init_failed ("can't open process file");
}
else
{
- (void) memset ((char *) &pi.prrun, 0, sizeof (pi.prrun));
+ memset ((char *) &pi.prrun, 0, sizeof (pi.prrun));
prfillset (&pi.prrun.pr_trace);
- proc_signal_handling_change ();
+ procfs_notice_signals ();
prfillset (&pi.prrun.pr_fault);
prdelset (&pi.prrun.pr_fault, FLTPAGE);
if (ioctl (pi.fd, PIOCWSTOP, &pi.prstatus) < 0)
GLOBAL FUNCTION
- proc_signal_handling_change
+ procfs_notice_signals
SYNOPSIS
- void proc_signal_handling_change (void);
+ static void procfs_notice_signals (void);
DESCRIPTION
involved.
*/
-void
-proc_signal_handling_change ()
+static void
+procfs_notice_signals ()
{
int signo;
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
proc_set_exec_trap -- arrange for exec'd child to halt at startup
tracing flags cleared.
*/
-void
+static void
proc_set_exec_trap ()
{
sysset_t exitset;
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);
{
long pr_flags;
pr_flags = PR_FORK;
- (void) ioctl (fd, PIOCRESET, &pr_flags);
+ ioctl (fd, PIOCRESET, &pr_flags);
}
#else
#if defined (PIOCRFORK) /* Original method */
- (void) ioctl (fd, PIOCRFORK, NULL);
+ 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;
if (pi.valid && (ioctl (pi.fd, PIOCNMAP, &nmap) == 0))
{
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;
}
-#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 ("Attaching program `%s', pid %d\n", exec_file, pid);
+ else
+ printf ("Attaching pid %d\n", pid);
+
+ fflush (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 ("Detaching program: %s pid %d\n",
+ exec_file, inferior_pid);
+ fflush (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 ("\tUsing the running image of %s process %d via /proc.\n",
+ attach_flag? "attached": "child", 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;
+
+ if (!open_proc_file (pid, &pi, O_RDWR))
{
perror_with_name (pi.pathname);
/* NOTREACHED */
else
{
pi.was_stopped = 0;
- if (query ("Process is currently running, stop it? "))
+ if (1 || query ("Process is currently running, stop it? "))
{
+ /* 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);
error ("PIOCSTOP failed");
}
+ pi.nopass_next_sigstop = 1;
+ }
+ else
+ {
+ printf ("Ok, gdb will wait for process %u to stop.\n", 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.saved_trace);
- (void) ioctl (pi.fd, PIOCGHOLD, &pi.saved_sighold);
- (void) ioctl (pi.fd, PIOCGFAULT, &pi.saved_fltset);
- (void) ioctl (pi.fd, PIOCGENTRY, &pi.saved_entryset);
- (void) ioctl (pi.fd, PIOCGEXIT, &pi.saved_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));
+ memset (&pi.prrun, 0, sizeof (pi.prrun));
prfillset (&pi.prrun.pr_trace);
- proc_signal_handling_change ();
+ procfs_notice_signals ();
prfillset (&pi.prrun.pr_fault);
prdelset (&pi.prrun.pr_fault, FLTPAGE);
if (ioctl (pi.fd, PIOCSFAULT, &pi.prrun.pr_fault))
/*
-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;
+
if (signal)
{
set_proc_siginfo (&pi, signal);
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 ("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");
+ printf ("PIOCSRLC or PIOCSET failed.\n");
}
}
}
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 *statloc)
DESCRIPTION
*/
-int
-proc_wait (statloc)
+static int
+procfs_wait (statloc)
int *statloc;
{
short what;
}
else if (!(pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
{
+ if (attach_flag)
+ set_sigint_trap(); /* Causes SIGINT to be passed on to the
+ attached process. */
+
if (ioctl (pi.fd, PIOCWSTOP, &pi.prstatus) < 0)
{
checkerr++;
}
+
+ if (attach_flag)
+ clear_sigint_trap();
}
if (checkerr)
{
rtnval = wait (&statval);
if (rtnval != inferior_pid)
{
+ print_sys_errmsg (pi.pathname, errno);
error ("PIOCWSTOP, wait failed, returned %d", rtnval);
/* NOTREACHED */
}
pi.prstatus.pr_flags);
/* NOTREACHED */
}
+
if (statloc)
{
*statloc = statval;
}
+
+ if (rtnval == -1) /* No more children to wait for */
+ {
+ fprintf (stderr, "Child process unexpectedly missing.\n");
+ *statloc = 42; /* Claim it exited with signal 42 */
+ return rtnval;
+ }
+
return (rtnval);
}
}
else
{
- (void) memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
+ memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
sip = &newsiginfo;
sip -> si_signo = signo;
sip -> si_code = 0;
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
- child_resume -- resume execution of the inferior process
+ procfs_resume -- resume execution of the inferior process
SYNOPSIS
- void child_resume (int step, int signo)
+ void procfs_resume (int step, int signo)
DESCRIPTION
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.
+
+ 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?)
*/
-void
-child_resume (step, signo)
+static void
+procfs_resume (step, signo)
int step;
int signo;
{
errno = 0;
- pi.prrun.pr_flags = PRSVADDR | PRSTRACE | PRSFAULT | PRCFAULT;
+ pi.prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT;
+
+#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)];
- if (signo)
+ pi.prrun.pr_flags != PRSVADDR;
+#endif
+
+ if (signo && !(signo == SIGSTOP && pi.nopass_next_sigstop))
{
set_proc_siginfo (&pi, signo);
}
{
pi.prrun.pr_flags |= PRCSIG;
}
+ pi.nopass_next_sigstop = 0;
if (step)
{
pi.prrun.pr_flags |= PRSTEP;
/*
-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)
/*
-GLOBAL FUNCTION
-
- fetch_core_registers -- fetch current registers from core file data
-
-SYNOPSIS
-
- void fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
- int which, unsigned in reg_addr)
-
-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.
-
-NOTES
-
- Use the indicated sizes to validate the gregset and fpregset
- structures.
-*/
-
-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 */
-{
-
- if (which == 0)
- {
- if (core_reg_size != sizeof (pi.gregset))
- {
- warning ("wrong size gregset struct in core file");
- }
- else
- {
- (void) memcpy ((char *) &pi.gregset, core_reg_sect,
- sizeof (pi.gregset));
- supply_gregset (&pi.gregset);
- }
- }
- else if (which == 2)
- {
- if (core_reg_size != sizeof (pi.fpregset))
- {
- warning ("wrong size fpregset struct in core file");
- }
- else
- {
- (void) memcpy ((char *) &pi.fpregset, core_reg_sect,
- sizeof (pi.fpregset));
-#if defined (FP0_REGNUM)
- supply_fpregset (&pi.fpregset);
-#endif
- }
- }
-}
-
-/*
-
LOCAL FUNCTION
proc_init_failed - called whenever /proc access initialization fails
char *why;
{
print_sys_errmsg (pi.pathname, errno);
- (void) kill (pi.pid, SIGKILL);
+ kill (pi.pid, SIGKILL);
close_proc_file (&pi);
error (why);
/* NOTREACHED */
pip -> pid = 0;
if (pip -> valid)
{
- (void) close (pip -> fd);
+ close (pip -> fd);
}
pip -> fd = -1;
if (pip -> pathname)
SYNOPSIS
- static int open_proc_file (pid, struct procinfo *pip)
+ static int open_proc_file (int pid, struct procinfo *pip, int mode)
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.
+ 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
*/
static int
-open_proc_file (pid, pip)
+open_proc_file (pid, pip, mode)
int pid;
struct procinfo *pip;
+ int mode;
{
- pip -> valid = 0;
+ pip -> valid = 0; /* FIXME, what is this? ?! */
if (pip -> valid)
{
- (void) close (pip -> fd);
+ close (pip -> fd);
}
if (pip -> pathname == NULL)
{
pip -> pathname = xmalloc (32);
}
sprintf (pip -> pathname, PROC_NAME_FMT, pid);
- if ((pip -> fd = open (pip -> pathname, O_RDWR)) >= 0)
+ if ((pip -> fd = open (pip -> pathname, mode)) >= 0)
{
pip -> valid = 1;
pip -> pid = pid;
else
{
printf_filtered ("\t%-16s %s.\n", signalname (what),
- sys_siglist[what]);
+ safe_strsignal (what));
}
break;
case PR_SYSENTRY:
printf_filtered ("%s ", signalname (sip -> si_signo));
if (sip -> si_errno > 0)
{
- printf_filtered ("%s ", lookupname (errno_table,
- sip -> si_errno, "errno"));
+ printf_filtered ("%s ", errnoname (sip -> si_errno));
}
if (sip -> si_code <= 0)
{
{
printf_filtered ("\n\n");
printf_filtered ("\t%-16s %s.\n", signalname (sip -> si_signo),
- sys_siglist[sip -> si_signo]);
+ safe_strsignal (sip -> si_signo));
if (sip -> si_errno > 0)
{
printf_filtered ("\t%-16s %s.\n",
- lookupname (errno_table,
- sip -> si_errno, "errno"),
- lookupdesc (errno_table, sip -> si_errno));
+ errnoname (sip -> si_errno),
+ safe_strerror (sip -> si_errno));
}
if (sip -> si_code <= 0)
{
signalname (signo)
int signo;
{
- char *abbrev;
+ char *name;
static char locbuf[32];
- abbrev = sig_abbrev (signo);
- if (abbrev == NULL)
+ name = strsigno (signo);
+ if (name == NULL)
{
- sprintf (locbuf, "signal %d", signo);
+ sprintf (locbuf, "Signal %d", signo);
}
else
{
- sprintf (locbuf, "SIG%s (%d)", abbrev, signo);
+ sprintf (locbuf, "%s (%d)", name, signo);
+ }
+ return (locbuf);
+}
+
+static char *
+errnoname (errnum)
+ int errnum;
+{
+ char *name;
+ static char locbuf[32];
+
+ name = strerrno (errnum);
+ if (name == NULL)
+ {
+ sprintf (locbuf, "Errno %d", errnum);
+ }
+ else
+ {
+ sprintf (locbuf, "%s (%d)", name, errnum);
}
return (locbuf);
}
printf_filtered ("%-8s ",
prismember (&pip -> prstatus.pr_sigpend, signo)
? "yes" : "no");
- printf_filtered (" %s\n", sys_siglist[signo]);
+ printf_filtered (" %s\n", safe_strsignal (signo));
}
printf_filtered ("\n");
}
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)
struct procinfo pii;
struct procinfo *pip;
struct cleanup *old_chain;
- char *nexttok;
char **argv;
int argsize;
int summary = 1;
{
pid = pii.pid;
pip = &pii;
- (void) memset (&pii, 0, sizeof (pii));
- if (!open_proc_file (pid, pip))
+ memset (&pii, 0, sizeof (pii));
+ if (!open_proc_file (pid, pip, O_RDONLY))
{
perror_with_name (pip -> pathname);
/* NOTREACHED */
if (!pip -> valid)
{
- 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)
{
do_cleanups (old_chain);
}
+/* 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... */
+ proceed ((CORE_ADDR) -1, 0, 0);
+}
+
+/* Clean up after the inferior dies. */
+
+static void
+procfs_mourn_inferior ()
+{
+ unpush_target (&procfs_ops);
+ generic_mourn_inferior ();
+}
+
+/* Mark our target-struct as eligible for stray "run" and "attach" commands. */
+static int
+procfs_can_run ()
+{
+ return(1);
+}
+\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 */
+};
+
/*
GLOBAL FUNCTION
- _initialize_proc_fs -- initialize the process file system stuff
+ _initialize_procfs -- initialize the process file system stuff
SYNOPSIS
- void _initialize_proc_fs (void)
+ void _initialize_procfs (void)
DESCRIPTION
*/
-static char *proc_desc =
+void
+_initialize_procfs ()
+{
+ add_target (&procfs_ops);
+
+ add_info ("proc", info_proc,
"Show process status information using /proc entry.\n\
Specify process id or use current inferior by default.\n\
Specify keywords for detailed information; default is summary.\n\
Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
`status', `syscalls', and `times'.\n\
-Unambiguous abbreviations may be used.";
+Unambiguous abbreviations may be used.");
-void
-_initialize_proc_fs ()
-{
- add_info ("proc", info_proc, proc_desc);
init_syscall_table ();
}
-
-#endif /* USE_PROC_FS */