/* 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"
-#include "param.h"
-
-#ifdef USE_PROC_FS /* Entire file goes away if not using /proc */
-#include <stdio.h>
+#include <time.h>
#include <sys/procfs.h>
#include <fcntl.h>
#include <errno.h>
+#include <string.h>
-#include "ansidecl.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 void EXFUN(supply_gregset, (gregset_t *gregsetp));
-extern void EXFUN(fill_gregset, (gregset_t *gresetp, int regno));
-
-#if defined (FP0_REGNUM)
-extern void EXFUN(supply_fpregset, (fpregset_t *fpregsetp));
-extern void EXFUN(fill_fpregset, (fpregset_t *fpresetp, int regno));
-#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 procinfo structure is statically allocated and only one exists at
- any given time. */
+ the procinfo structure for the inferior is statically allocated and
+ only one exists at any given time. There is a separate procinfo
+ structure for use by the "info proc" command, so that we can print
+ useful information about any random process without interfering with
+ the inferior's procinfo information. */
struct procinfo {
int valid; /* Nonzero if pid, fd, & pathname are valid */
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 */
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 */
-} pi;
+ fltset_t saved_fltset; /* Saved traced hardware fault set */
+ sigset_t saved_trace; /* Saved traced signal set */
+ sigset_t saved_sighold; /* Saved held signal set */
+ sysset_t saved_exitset; /* Saved traced system call exit set */
+ sysset_t saved_entryset; /* Saved traced system call entry set */
+};
+
+static struct procinfo pi; /* Inferior's process information */
+
+/* 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
+};
-/* Forward declarations of static functions so we don't have to worry
- about ordering within this file. The EXFUN macro may be slightly
- misleading. Should probably be called DCLFUN instead, or something
- more intuitive, since it can be used for both static and external
- definitions. */
+/* Translate values in the pr_why field of the prstatus struct. */
-static void EXFUN(proc_init_failed, (char *why));
-static int EXFUN(open_proc_file, (int pid));
-static void EXFUN(close_proc_file, (void));
-static void EXFUN(unconditionally_kill_inferior, (void));
+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. */
-GLOBAL FUNCTION
+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
+};
- ptrace -- override library version to force errors for /proc version
+/* Translation table for signal generation information. See UNIX System
+ V Release 4 Programmer's Reference Manual, siginfo(5). */
-SYNOPSIS
+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
+};
- int ptrace (int request, int pid, int arg3, int arg4)
+static char *syscall_table[MAX_SYSCALLS];
-DESCRIPTION
+/* Prototypes for local functions */
- When gdb is configured to use /proc, it should not be calling
- or otherwise attempting to use ptrace. In order to catch errors
- where use of /proc is configured, but some routine is still calling
- ptrace, we provide a local version of a function with that name
- that does nothing but issue an error message.
-*/
+static void
+set_proc_siginfo PARAMS ((struct procinfo *, int));
-int
-DEFUN(ptrace, (request, pid, arg3, arg4),
- int request AND
- int pid AND
- int arg3 AND
- int arg4)
-{
- error ("internal error - there is a call to ptrace() somewhere");
- /*NOTREACHED*/
-}
+static void
+init_syscall_table PARAMS ((void));
-/*
+static char *
+syscallname PARAMS ((int));
-GLOBAL FUNCTION
+static char *
+signalname PARAMS ((int));
- kill_inferior_fast -- kill inferior while gdb is exiting
+static char *
+errnoname PARAMS ((int));
-SYNOPSIS
+static int
+proc_address_to_fd PARAMS ((CORE_ADDR, int));
- void kill_inferior_fast (void)
+static int
+open_proc_file PARAMS ((int, struct procinfo *, int));
-DESCRIPTION
+static void
+close_proc_file PARAMS ((struct procinfo *));
- This is used when GDB is exiting. It gives less chance of error.
+static void
+unconditionally_kill_inferior PARAMS ((void));
-NOTES
+static void
+proc_init_failed PARAMS ((char *));
- Don't attempt to kill attached inferiors since we may be called
- when gdb is in the process of aborting, and killing the attached
- inferior may be very anti-social. This is particularly true if we
- were attached just so we could use the /proc facilities to get
- detailed information about it's status.
+static void
+info_proc PARAMS ((char *, int));
-*/
+static void
+info_proc_flags PARAMS ((struct procinfo *, int));
-void
-DEFUN_VOID(kill_inferior_fast)
-{
- if (inferior_pid != 0 && !attach_flag)
- {
- unconditionally_kill_inferior ();
- }
-}
+static void
+info_proc_stop PARAMS ((struct procinfo *, int));
-/*
+static void
+info_proc_siginfo PARAMS ((struct procinfo *, int));
-GLOBAL FUNCTION
+static void
+info_proc_syscalls PARAMS ((struct procinfo *, int));
- kill_inferior - kill any currently inferior
+static void
+info_proc_mappings PARAMS ((struct procinfo *, int));
-SYNOPSIS
+static void
+info_proc_signals PARAMS ((struct procinfo *, int));
- void kill_inferior (void)
+static void
+info_proc_faults PARAMS ((struct procinfo *, int));
-DESCRIPTION
+static char *
+mappingflags PARAMS ((long));
- Kill any current inferior.
+static char *
+lookupname PARAMS ((struct trans *, unsigned int, char *));
-NOTES
+static char *
+lookupdesc PARAMS ((struct trans *, unsigned int));
- 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 int
+do_attach PARAMS ((int pid));
-*/
+static void
+do_detach PARAMS ((int siggnal));
-void
-DEFUN_VOID(kill_inferior)
+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. */
+
+extern void
+supply_gregset PARAMS ((gregset_t *));
+
+extern void
+fill_gregset PARAMS ((gregset_t *, int));
+
+extern void
+supply_fpregset PARAMS ((fpregset_t *));
+
+extern void
+fill_fpregset PARAMS ((fpregset_t *, int));
+
+/*
+
+LOCAL FUNCTION
+
+ lookupdesc -- translate a value to a summary desc string
+
+SYNOPSIS
+
+ static char *lookupdesc (struct trans *transp, unsigned int val);
+
+DESCRIPTION
+
+ Given a pointer to a translation table and a value to be translated,
+ lookup the desc string and return it.
+ */
+
+static char *
+lookupdesc (transp, val)
+ struct trans *transp;
+ unsigned int val;
{
- if (inferior_pid != 0)
+ char *desc;
+
+ for (desc = NULL; transp -> name != NULL; transp++)
{
- unconditionally_kill_inferior ();
- target_mourn_inferior ();
+ if (transp -> value == val)
+ {
+ desc = transp -> desc;
+ break;
+ }
+ }
+
+ /* Didn't find a translation for the specified value, set a default one. */
+
+ if (desc == NULL)
+ {
+ desc = "Unknown";
}
+ return (desc);
}
/*
LOCAL FUNCTION
- unconditionally_kill_inferior - terminate the inferior
+ lookupname -- translate a value to symbolic name
SYNOPSIS
- static void unconditionally_kill_inferior (void)
+ 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.
+ */
- Kill the current inferior. Should not be called until it
- is at least tested that there is an inferior.
+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;
+ }
+ }
-NOTE
+ /* 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. */
- 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 (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 void
-DEFUN_VOID(unconditionally_kill_inferior)
+static char *
+sigcodedesc (sip)
+ siginfo_t *sip;
{
- int signo;
+ struct sigcode *scp;
+ char *desc = NULL;
- signo = SIGKILL;
- (void) ioctl (pi.fd, PIOCKILL, &signo);
- close_proc_file ();
- wait ((int *) 0);
+ 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);
}
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
- child_xfer_memory -- copy data to or from inferior memory space
+ syscallname - translate a system call number into a system call name
SYNOPSIS
- int child_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
- int dowrite, struct target_ops target)
+ char *syscallname (int syscallnum)
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 system call number, translate it into the printable name
+ of a system call, or into "syscall <num>" if it is an unknown
+ number.
*/
-
-int
-DEFUN(child_xfer_memory, (memaddr, myaddr, len, dowrite, target),
- CORE_ADDR memaddr AND
- char *myaddr AND
- int len AND
- int dowrite AND
- struct target_ops target /* ignored */)
+static char *
+syscallname (syscallnum)
+ int syscallnum;
{
- int nbytes = 0;
-
- if (lseek (pi.fd, (off_t) memaddr, 0) == (off_t) memaddr)
+ static char locbuf[32];
+ char *rtnval;
+
+ if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS)
{
- if (dowrite)
- {
- nbytes = write (pi.fd, myaddr, len);
- }
- else
- {
- nbytes = read (pi.fd, myaddr, len);
- }
- if (nbytes < 0)
- {
- nbytes = 0;
- }
+ rtnval = syscall_table[syscallnum];
}
- return (nbytes);
+ else
+ {
+ sprintf (locbuf, "syscall %u", syscallnum);
+ rtnval = locbuf;
+ }
+ return (rtnval);
}
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
- store_inferior_registers -- copy register values back to inferior
+ init_syscall_table - initialize syscall translation table
SYNOPSIS
- void store_inferior_registers (int regno)
+ void init_syscall_table (void)
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.
+ Dynamically initialize the translation table to convert system
+ call numbers into printable system call names. Done once per
+ gdb run, on initialization.
NOTES
- If we are storing only a single register, we first have to get all
- the current values from the process, overwrite the desired register
- in the gregset with the one we want from gdb's registers, and then
- send the whole set back to the process. For writing all the
- registers, all we have to do is generate the gregset and send it to
- the process.
+ This is awfully ugly, but preprocessor tricks to make it prettier
+ tend to be nonportable.
+ */
- Also note that the process has to be stopped on an event of interest
- for this to work, which basically means that it has to have been
- run under the control of one of the other /proc ioctl calls and not
- ptrace. Since we don't use ptrace anyway, we don't worry about this
+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
+}
+
+/*
+
+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 ()
+{
+ if (inferior_pid != 0)
+ {
+ unconditionally_kill_inferior ();
+ target_mourn_inferior ();
+ }
+}
+
+/*
+
+LOCAL FUNCTION
+
+ unconditionally_kill_inferior - terminate the inferior
+
+SYNOPSIS
+
+ static void unconditionally_kill_inferior (void)
+
+DESCRIPTION
+
+ Kill the current inferior. Should not be called until it
+ is at least tested that there is an 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.
+
+*/
+
+static void
+unconditionally_kill_inferior ()
+{
+ int signo;
+
+ signo = SIGKILL;
+ ioctl (pi.fd, PIOCKILL, &signo);
+ close_proc_file (&pi);
+ 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;
+
+ if (lseek (pi.fd, (off_t) memaddr, 0) == (off_t) memaddr)
+ {
+ if (dowrite)
+ {
+ nbytes = write (pi.fd, myaddr, len);
+ }
+ else
+ {
+ nbytes = read (pi.fd, myaddr, len);
+ }
+ if (nbytes < 0)
+ {
+ nbytes = 0;
+ }
+ }
+ return (nbytes);
+}
+
+/*
+
+LOCAL FUNCTION
+
+ procfs_store_registers -- copy register values back to inferior
+
+SYNOPSIS
+
+ void procfs_store_registers (int regno)
+
+DESCRIPTION
+
+ Store our current register values back into the inferior. If
+ REGNO is -1 then store all the register, otherwise store just
+ the value specified by REGNO.
+
+NOTES
+
+ If we are storing only a single register, we first have to get all
+ the current values from the process, overwrite the desired register
+ in the gregset with the one we want from gdb's registers, and then
+ send the whole set back to the process. For writing all the
+ registers, all we have to do is generate the gregset and send it to
+ the process.
+
+ Also note that the process has to be stopped on an event of interest
+ for this to work, which basically means that it has to have been
+ run under the control of one of the other /proc ioctl calls and not
+ ptrace. Since we don't use ptrace anyway, we don't worry about this
fine point, but it is worth noting for future reference.
Gdb is confused about what this function is supposed to return.
*/
-void
-DEFUN(store_inferior_registers, (regno),
- int 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
If proc_init_failed ever gets called, control returns to the command
processing loop via the standard error handling code.
+
*/
-void
-DEFUN(inferior_proc_init, (int pid),
- int pid)
+static void
+procfs_init_inferior (pid)
+ int pid;
{
- if (!open_proc_file (pid))
+
+ push_target (&procfs_ops);
+
+ if (!open_proc_file (pid, &pi, O_RDWR))
{
proc_init_failed ("can't open process file");
}
else
{
- (void) memset (&pi.prrun, 0, sizeof (pi.prrun));
+ memset ((char *) &pi.prrun, 0, sizeof (pi.prrun));
prfillset (&pi.prrun.pr_trace);
+ procfs_notice_signals ();
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)
- {
- proc_init_failed ("PIOCSTRACE failed");
- }
else if (ioctl (pi.fd, PIOCSFAULT, &pi.prrun.pr_fault) < 0)
{
proc_init_failed ("PIOCSFAULT failed");
GLOBAL FUNCTION
+ procfs_notice_signals
+
+SYNOPSIS
+
+ static void procfs_notice_signals (void);
+
+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 ()
+{
+ int signo;
+
+ if (pi.valid)
+ {
+ for (signo = 0; signo < NSIG; signo++)
+ {
+ if (signal_stop_state (signo) == 0 &&
+ signal_print_state (signo) == 0 &&
+ signal_pass_state (signo) == 1)
+ {
+ prdelset (&pi.prrun.pr_trace, signo);
+ }
+ else
+ {
+ praddset (&pi.prrun.pr_trace, signo);
+ }
+ }
+ if (ioctl (pi.fd, PIOCSTRACE, &pi.prrun.pr_trace))
+ {
+ print_sys_errmsg ("PIOCSTRACE failed", errno);
+ }
+ }
+}
+
+/*
+
+LOCAL FUNCTION
+
proc_set_exec_trap -- arrange for exec'd child to halt at startup
SYNOPSIS
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
-DEFUN_VOID(proc_set_exec_trap)
+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);
_exit (127);
}
premptyset (&exitset);
+
+ /* GW: Rationale...
+ Not all systems with /proc have all the exec* syscalls with the same
+ names. On the SGI, for example, there is no SYS_exec, but there
+ *is* a SYS_execv. So, we try to account for that. */
+
+#ifdef SYS_exec
praddset (&exitset, SYS_exec);
+#endif
+#ifdef SYS_execve
praddset (&exitset, SYS_execve);
+#endif
+#ifdef SYS_execv
+ praddset(&exitset, SYS_execv);
+#endif
+
if (ioctl (fd, PIOCSEXIT, &exitset) < 0)
{
perror (procname);
fflush (stderr);
_exit (127);
}
+
+ /* 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
}
+/*
+
+GLOBAL FUNCTION
+
+ proc_iterate_over_mappings -- call function for every mapped space
+
+SYNOPSIS
+
+ int proc_iterate_over_mappings (int (*func)())
+
+DESCRIPTION
+
+ Given a pointer to a function, call that function for every
+ mapped address space, passing it an open file descriptor for
+ the file corresponding to that mapped address space (if any)
+ and the base address of the mapped space. Quit when we hit
+ the end of the mappings or the function returns nonzero.
+ */
-#ifdef ATTACH_DETACH
+int
+proc_iterate_over_mappings (func)
+ int (*func) PARAMS ((int, CORE_ADDR));
+{
+ int nmap;
+ int fd;
+ int funcstat = 0;
+ struct prmap *prmaps;
+ struct prmap *prmap;
+ if (pi.valid && (ioctl (pi.fd, PIOCNMAP, &nmap) == 0))
+ {
+ prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
+ 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);
+ funcstat = (*func) (fd, (CORE_ADDR) prmap -> pr_vaddr);
+ close (fd);
+ }
+ }
+ }
+ return (funcstat);
+}
+
+#if 0 /* Currently unused */
/*
GLOBAL FUNCTION
- attach -- attach to an already existing process
+ proc_base_address -- find base address for segment containing address
SYNOPSIS
- int attach (int pid)
+ CORE_ADDR proc_base_address (CORE_ADDR addr)
+
+DESCRIPTION
+
+ Given an address of a location in the inferior, find and return
+ the base address of the mapped segment containing that address.
+
+ This is used for example, by the shared library support code,
+ where we have the pc value for some location in the shared library
+ where we are stopped, and need to know the base address of the
+ segment containing that address.
+*/
+
+CORE_ADDR
+proc_base_address (addr)
+ CORE_ADDR addr;
+{
+ int nmap;
+ struct prmap *prmaps;
+ struct prmap *prmap;
+ CORE_ADDR baseaddr = 0;
+
+ if (pi.valid && (ioctl (pi.fd, PIOCNMAP, &nmap) == 0))
+ {
+ prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
+ if (ioctl (pi.fd, PIOCMAP, prmaps) == 0)
+ {
+ for (prmap = prmaps; prmap -> pr_size; ++prmap)
+ {
+ if ((prmap -> pr_vaddr <= (caddr_t) addr) &&
+ (prmap -> pr_vaddr + prmap -> pr_size > (caddr_t) addr))
+ {
+ baseaddr = (CORE_ADDR) prmap -> pr_vaddr;
+ break;
+ }
+ }
+ }
+ }
+ return (baseaddr);
+}
+
+#endif /* 0 */
+
+/*
+
+LOCAL FUNCTION
+
+ proc_address_to_fd -- return open fd for file mapped to address
+
+SYNOPSIS
+
+ int proc_address_to_fd (CORE_ADDR addr, complain)
+
+DESCRIPTION
+
+ Given an address in the current inferior's address space, use the
+ /proc interface to find an open file descriptor for the file that
+ this address was mapped in from. Return -1 if there is no current
+ inferior. Print a warning message if there is an inferior but
+ the address corresponds to no file (IE a bogus address).
+
+*/
+
+static int
+proc_address_to_fd (addr, complain)
+ CORE_ADDR addr;
+ int complain;
+{
+ int fd = -1;
+
+ if (pi.valid)
+ {
+ if ((fd = ioctl (pi.fd, PIOCOPENM, (caddr_t *) &addr)) < 0)
+ {
+ if (complain)
+ {
+ print_sys_errmsg (pi.pathname, errno);
+ warning ("can't find mapped file for address 0x%x", addr);
+ }
+ }
+ }
+ return (fd);
+}
+
+
+/* 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 to program `%s', %s\n", exec_file, target_pid_to_str (pid));
+ else
+ printf ("Attaching to %s\n", target_pid_to_str (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 from program: %s %s\n",
+ exec_file, target_pid_to_str (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 %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.");
+}
+
+/*
+
+LOCAL FUNCTION
+
+ do_attach -- attach to an already existing process
+
+SYNOPSIS
+
+ 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
-DEFUN(attach, (pid),
- int pid)
+static int
+do_attach (pid)
+ int pid;
{
- if (!open_proc_file (pid))
+ int result;
+
+ if (!open_proc_file (pid, &pi, O_RDWR))
{
perror_with_name (pi.pathname);
/* NOTREACHED */
if (ioctl (pi.fd, PIOCSTATUS, &pi.prstatus) < 0)
{
print_sys_errmsg (pi.pathname, errno);
- close_proc_file ();
+ close_proc_file (&pi);
error ("PIOCSTATUS failed");
}
if (pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
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 ();
+ close_proc_file (&pi);
error ("PIOCSTOP failed");
}
+ pi.nopass_next_sigstop = 1;
+ }
+ else
+ {
+ printf ("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));
+ memset (&pi.prrun, 0, sizeof (pi.prrun));
prfillset (&pi.prrun.pr_trace);
+ procfs_notice_signals ();
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");
+ print_sys_errmsg ("PIOCSFAULT failed", errno);
}
if (ioctl (pi.fd, PIOCSTRACE, &pi.prrun.pr_trace))
{
- print_sys_errmsg ("PIOCSTRACE failed");
+ print_sys_errmsg ("PIOCSTRACE failed", errno);
}
attach_flag = 1;
return (pid);
/*
-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
-DEFUN(detach, (signal),
- int signal)
+static void
+do_detach (signal)
+ int signal;
{
+ int result;
+
if (signal)
{
- struct siginfo siginfo;
- siginfo.si_signo = signal;
- siginfo.si_code = 0;
- siginfo.si_errno = 0;
- if (ioctl (pi.fd, PIOCSSIG, &siginfo) < 0)
- {
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCSSIG failed.\n");
- }
+ set_proc_siginfo (&pi, signal);
}
- if (ioctl (pi.fd, PIOCSEXIT, &pi.exitset) < 0)
+ if (ioctl (pi.fd, PIOCSEXIT, &pi.saved_exitset) < 0)
{
print_sys_errmsg (pi.pathname, errno);
printf ("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");
}
- 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");
}
- if (ioctl (pi.fd, PIOCSFAULT, &pi.fltset) < 0)
+ if (ioctl (pi.fd, PIOCSHOLD, &pi.saved_sighold) < 0)
+ {
+ print_sys_errmsg (pi.pathname, errno);
+ printf ("PIOSCHOLD failed.\n");
+ }
+ if (ioctl (pi.fd, PIOCSFAULT, &pi.saved_fltset) < 0)
{
print_sys_errmsg (pi.pathname, errno);
printf ("PIOCSFAULT failed.\n");
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");
}
}
}
}
- close_proc_file ();
+ 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 *statloc)
DESCRIPTION
*/
-int
-DEFUN(proc_wait, (statloc),
- int *statloc)
+static int
+procfs_wait (statloc)
+ int *statloc;
{
short what;
short why;
}
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 */
}
{
statval = (what << 8) | 0177;
}
- else if ((why == PR_SYSEXIT) &&
- (what == SYS_exec || what == SYS_execve))
+ else if ((why == PR_SYSEXIT)
+ &&
+ (
+#ifdef SYS_exec
+ what == SYS_exec
+#else
+ 0 == 0
+#endif
+#ifdef SYS_execve
+ || what == SYS_execve
+#endif
+#ifdef SYS_execv
+ || what == SYS_execv
+#endif
+ ))
{
statval = (SIGTRAP << 8) | 0177;
}
}
else
{
- rtnval = -1;
- error ("PIOCWSTOP, unknown why %d, what %d", why, what);
- /* NOTREACHED */
+ rtnval = -1;
+ error ("PIOCWSTOP, unknown why %d, what %d", why, what);
+ /* NOTREACHED */
+ }
+ }
+ else
+ {
+ error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
+ 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);
+}
+
+/*
+
+LOCAL FUNCTION
+
+ set_proc_siginfo - set a process's current signal info
+
+SYNOPSIS
+
+ void set_proc_siginfo (struct procinfo *pip, int signo);
+
+DESCRIPTION
+
+ Given a pointer to a process info struct in PIP and a signal number
+ in SIGNO, set the process's current signal and its associated signal
+ information. The signal will be delivered to the process immediately
+ after execution is resumed, even if it is being held. In addition,
+ this particular delivery will not cause another PR_SIGNALLED stop
+ even if the signal is being traced.
+
+ If we are not delivering the same signal that the prstatus siginfo
+ struct contains information about, then synthesize a siginfo struct
+ to match the signal we are doing to deliver, make it of the type
+ "generated by a user process", and send this synthesized copy. When
+ used to set the inferior's signal state, this will be required if we
+ are not currently stopped because of a traced signal, or if we decide
+ to continue with a different signal.
+
+ Note that when continuing the inferior from a stop due to receipt
+ of a traced signal, we either have set PRCSIG to clear the existing
+ signal, or we have to call this function to do a PIOCSSIG with either
+ the existing siginfo struct from pr_info, or one we have synthesized
+ appropriately for the signal we want to deliver. Otherwise if the
+ signal is still being traced, the inferior will immediately stop
+ again.
+
+ See siginfo(5) for more details.
+*/
+
+static void
+set_proc_siginfo (pip, signo)
+ struct procinfo *pip;
+ int signo;
+{
+ struct siginfo newsiginfo;
+ struct siginfo *sip;
+
+ if (pip -> valid)
+ {
+ if (signo == pip -> prstatus.pr_info.si_signo)
+ {
+ sip = &pip -> prstatus.pr_info;
+ }
+ else
+ {
+ memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
+ sip = &newsiginfo;
+ sip -> si_signo = signo;
+ sip -> si_code = 0;
+ sip -> si_errno = 0;
+ sip -> si_pid = getpid ();
+ sip -> si_uid = getuid ();
+ }
+ if (ioctl (pip -> fd, PIOCSSIG, sip) < 0)
+ {
+ print_sys_errmsg (pip -> pathname, errno);
+ warning ("PIOCSSIG failed");
+ }
+ }
+}
+
+/* Resume execution of process PID. If STEP is nozero, then
+ just single step it. If SIGNAL is nonzero, restart it with that
+ signal activated. */
+
+static void
+procfs_resume (pid, step, signo)
+ int pid;
+ int step;
+ int signo;
+{
+ int signal_to_pass;
+
+ errno = 0;
+ pi.prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT;
+
+#if 0
+ /* It should not be necessary. If the user explicitly changes the value,
+ value_assign calls write_register_bytes, which writes it. */
+/* It may not be absolutely necessary to specify the PC value for
+ restarting, but to be safe we use the value that gdb considers
+ to be current. One case where this might be necessary is if the
+ user explicitly changes the PC value that gdb considers to be
+ current. FIXME: Investigate if this is necessary or not. */
+
+#ifdef PRSVADDR_BROKEN
+/* Can't do this under Solaris running on a Sparc, as there seems to be no
+ place to put nPC. In fact, if you use this, nPC seems to be set to some
+ random garbage. We have to rely on the fact that PC and nPC have been
+ written previously via PIOCSREG during a register flush. */
+
+ pi.prrun.pr_vaddr = (caddr_t) *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)];
+ pi.prrun.pr_flags != PRSVADDR;
+#endif
+#endif
+
+ if (signo == 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_to_pass);
+ }
+ else
+ {
+ pi.prrun.pr_flags |= PRCSIG;
+ }
+ pi.nopass_next_sigstop = 0;
+ if (step)
+ {
+ pi.prrun.pr_flags |= PRSTEP;
+ }
+ if (ioctl (pi.fd, PIOCRUN, &pi.prrun) != 0)
+ {
+ perror_with_name (pi.pathname);
+ /* NOTREACHED */
+ }
+}
+
+/*
+
+LOCAL FUNCTION
+
+ procfs_fetch_registers -- fetch current registers from inferior
+
+SYNOPSIS
+
+ void procfs_fetch_registers (int regno)
+
+DESCRIPTION
+
+ Read the current values of the inferior's registers, both the
+ general register set and floating point registers (if supported)
+ and update gdb's idea of their current values.
+
+*/
+
+static void
+procfs_fetch_registers (regno)
+ int regno;
+{
+ if (ioctl (pi.fd, PIOCGREG, &pi.gregset) != -1)
+ {
+ supply_gregset (&pi.gregset);
+ }
+#if defined (FP0_REGNUM)
+ if (ioctl (pi.fd, PIOCGFPREG, &pi.fpregset) != -1)
+ {
+ supply_fpregset (&pi.fpregset);
+ }
+#endif
+}
+
+/*
+
+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;
+{
+ print_sys_errmsg (pi.pathname, errno);
+ kill (pi.pid, SIGKILL);
+ close_proc_file (&pi);
+ error (why);
+ /* NOTREACHED */
+}
+
+/*
+
+LOCAL FUNCTION
+
+ close_proc_file - close any currently open /proc entry
+
+SYNOPSIS
+
+ static void close_proc_file (struct procinfo *pip)
+
+DESCRIPTION
+
+ Close any currently open /proc entry and mark the process information
+ entry as invalid. In order to ensure that we don't try to reuse any
+ stale information, the pid, fd, and pathnames are explicitly
+ invalidated, which may be overkill.
+
+ */
+
+static void
+close_proc_file (pip)
+ struct procinfo *pip;
+{
+ pip -> pid = 0;
+ if (pip -> valid)
+ {
+ close (pip -> fd);
+ }
+ pip -> fd = -1;
+ if (pip -> pathname)
+ {
+ free (pip -> pathname);
+ pip -> pathname = NULL;
+ }
+ pip -> valid = 0;
+}
+
+/*
+
+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 -> valid = 0; /* FIXME, what is this? ?! */
+ if (pip -> valid)
+ {
+ close (pip -> fd);
+ }
+ if (pip -> pathname == NULL)
+ {
+ pip -> pathname = xmalloc (32);
+ }
+ sprintf (pip -> pathname, PROC_NAME_FMT, pid);
+ if ((pip -> fd = open (pip -> pathname, mode)) >= 0)
+ {
+ pip -> valid = 1;
+ pip -> pid = pid;
+ }
+ return (pip -> valid);
+}
+
+static char *
+mappingflags (flags)
+ long flags;
+{
+ static char asciiflags[8];
+
+ strcpy (asciiflags, "-------");
+#if defined (MA_PHYS)
+ if (flags & MA_PHYS) asciiflags[0] = 'd';
+#endif
+ if (flags & MA_STACK) asciiflags[1] = 's';
+ if (flags & MA_BREAK) asciiflags[2] = 'b';
+ if (flags & MA_SHARED) asciiflags[3] = 's';
+ if (flags & MA_READ) asciiflags[4] = 'r';
+ if (flags & MA_WRITE) asciiflags[5] = 'w';
+ if (flags & MA_EXEC) asciiflags[6] = 'x';
+ return (asciiflags);
+}
+
+static void
+info_proc_flags (pip, summary)
+ struct procinfo *pip;
+ int summary;
+{
+ struct trans *transp;
+
+ printf_filtered ("%-32s", "Process status flags:");
+ if (!summary)
+ {
+ printf_filtered ("\n\n");
+ }
+ for (transp = pr_flag_table; transp -> name != NULL; transp++)
+ {
+ if (pip -> prstatus.pr_flags & transp -> value)
+ {
+ if (summary)
+ {
+ printf_filtered ("%s ", transp -> name);
+ }
+ else
+ {
+ printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc);
+ }
+ }
+ }
+ printf_filtered ("\n");
+}
+
+static void
+info_proc_stop (pip, summary)
+ struct procinfo *pip;
+ int summary;
+{
+ struct trans *transp;
+ int why;
+ int what;
+
+ why = pip -> prstatus.pr_why;
+ what = pip -> prstatus.pr_what;
+
+ if (pip -> prstatus.pr_flags & PR_STOPPED)
+ {
+ printf_filtered ("%-32s", "Reason for stopping:");
+ if (!summary)
+ {
+ printf_filtered ("\n\n");
+ }
+ for (transp = pr_why_table; transp -> name != NULL; transp++)
+ {
+ if (why == transp -> value)
+ {
+ if (summary)
+ {
+ printf_filtered ("%s ", transp -> name);
+ }
+ else
+ {
+ printf_filtered ("\t%-16s %s.\n",
+ transp -> name, transp -> desc);
+ }
+ break;
+ }
+ }
+
+ /* Use the pr_why field to determine what the pr_what field means, and
+ print more information. */
+
+ switch (why)
+ {
+ case PR_REQUESTED:
+ /* pr_what is unused for this case */
+ break;
+ case PR_JOBCONTROL:
+ case PR_SIGNALLED:
+ if (summary)
+ {
+ printf_filtered ("%s ", signalname (what));
+ }
+ else
+ {
+ printf_filtered ("\t%-16s %s.\n", signalname (what),
+ safe_strsignal (what));
+ }
+ break;
+ case PR_SYSENTRY:
+ if (summary)
+ {
+ printf_filtered ("%s ", syscallname (what));
+ }
+ else
+ {
+ printf_filtered ("\t%-16s %s.\n", syscallname (what),
+ "Entered this system call");
+ }
+ break;
+ case PR_SYSEXIT:
+ if (summary)
+ {
+ printf_filtered ("%s ", syscallname (what));
+ }
+ else
+ {
+ printf_filtered ("\t%-16s %s.\n", syscallname (what),
+ "Returned from this system call");
+ }
+ break;
+ case PR_FAULTED:
+ if (summary)
+ {
+ printf_filtered ("%s ",
+ lookupname (faults_table, what, "fault"));
+ }
+ else
+ {
+ printf_filtered ("\t%-16s %s.\n",
+ lookupname (faults_table, what, "fault"),
+ lookupdesc (faults_table, what));
+ }
+ break;
+ }
+ printf_filtered ("\n");
+ }
+}
+
+static void
+info_proc_siginfo (pip, summary)
+ struct procinfo *pip;
+ int summary;
+{
+ struct siginfo *sip;
+
+ if ((pip -> prstatus.pr_flags & PR_STOPPED) &&
+ (pip -> prstatus.pr_why == PR_SIGNALLED ||
+ pip -> prstatus.pr_why == PR_FAULTED))
+ {
+ printf_filtered ("%-32s", "Additional signal/fault info:");
+ sip = &pip -> prstatus.pr_info;
+ if (summary)
+ {
+ printf_filtered ("%s ", signalname (sip -> si_signo));
+ if (sip -> si_errno > 0)
+ {
+ printf_filtered ("%s ", errnoname (sip -> si_errno));
+ }
+ if (sip -> si_code <= 0)
+ {
+ printf_filtered ("sent by %s, uid %d ",
+ target_pid_to_str (sip -> si_pid),
+ sip -> si_uid);
+ }
+ else
+ {
+ printf_filtered ("%s ", sigcodename (sip));
+ if ((sip -> si_signo == SIGILL) ||
+ (sip -> si_signo == SIGFPE) ||
+ (sip -> si_signo == SIGSEGV) ||
+ (sip -> si_signo == SIGBUS))
+ {
+ printf_filtered ("addr=%#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
+ {
+ 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");
}
- else
- {
- error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
- pi.prstatus.pr_flags);
- /* NOTREACHED */
- }
- if (statloc)
- {
- *statloc = statval;
- }
- return (rtnval);
}
-/*
-
-GLOBAL FUNCTION
-
- child_resume -- resume execution of the inferior process
-
-SYNOPSIS
-
- void child_resume (int step, int signal)
-
-DESCRIPTION
-
- Resume execution of the inferior process. If STEP is nozero, then
- just single step it. If SIGNAL is nonzero, restart it with that
- signal activated.
+static void
+info_proc_syscalls (pip, summary)
+ struct procinfo *pip;
+ int summary;
+{
+ int syscallnum;
-NOTE
+ if (!summary)
+ {
- It may not be absolutely necessary to specify the PC value for
- restarting, but to be safe we use the value that gdb considers
- to be current. One case where this might be necessary is if the
- user explicitly changes the PC value that gdb considers to be
- current. FIXME: Investigate if this is necessary or not.
- */
+#if 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
-void
-DEFUN(child_resume, (step, signal),
- int step AND
- 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)
- {
- if (signal != pi.prstatus.pr_cursig)
+ if (ioctl (pip -> fd, PIOCGENTRY, &pip -> entryset) < 0)
{
- struct siginfo siginfo;
- siginfo.si_signo = signal;
- siginfo.si_code = 0;
- siginfo.si_errno = 0;
- (void) ioctl (pi.fd, PIOCSSIG, &siginfo);
+ 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");
}
- else
- {
- pi.prrun.pr_flags |= PRCSIG;
- }
- if (step)
+}
+
+static char *
+signalname (signo)
+ int signo;
+{
+ char *name;
+ static char locbuf[32];
+
+ name = strsigno (signo);
+ if (name == NULL)
{
- pi.prrun.pr_flags |= PRSTEP;
+ sprintf (locbuf, "Signal %d", signo);
}
- if (ioctl (pi.fd, PIOCRUN, &pi.prrun) != 0)
+ else
{
- perror_with_name (pi.pathname);
- /* NOTREACHED */
+ sprintf (locbuf, "%s (%d)", name, signo);
}
+ return (locbuf);
}
-/*
-
-GLOBAL FUNCTION
-
- fetch_inferior_registers -- fetch current registers from inferior
-
-SYNOPSIS
-
- void fetch_inferior_registers (void)
-
-DESCRIPTION
-
- Read the current values of the inferior's registers, both the
- general register set and floating point registers (if supported)
- and update gdb's idea of their current values.
-
-*/
-
-void
-DEFUN_VOID(fetch_inferior_registers)
+static char *
+errnoname (errnum)
+ int errnum;
{
- if (ioctl (pi.fd, PIOCGREG, &pi.gregset) != -1)
+ char *name;
+ static char locbuf[32];
+
+ name = strerrno (errnum);
+ if (name == NULL)
{
- supply_gregset (&pi.gregset);
+ sprintf (locbuf, "Errno %d", errnum);
}
-#if defined (FP0_REGNUM)
- if (ioctl (pi.fd, PIOCGFPREG, &pi.fpregset) != -1)
+ else
{
- supply_fpregset (&pi.fpregset);
+ sprintf (locbuf, "%s (%d)", name, errnum);
}
-#endif
+ return (locbuf);
}
-/*
-
-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)
-
-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)
- char *core_reg_sect;
- unsigned core_reg_size;
- int which;
+static void
+info_proc_signals (pip, summary)
+ struct procinfo *pip;
+ int summary;
{
+ int signo;
- if (which == 0)
+ if (!summary)
{
- if (core_reg_size != sizeof (pi.gregset))
+ if (ioctl (pip -> fd, PIOCGTRACE, &pip -> trace) < 0)
{
- warning ("wrong size gregset struct in core file");
+ print_sys_errmsg (pip -> pathname, errno);
+ error ("PIOCGTRACE failed");
}
- else
+
+ 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++)
{
- (void) memcpy ((char *) &pi.gregset, core_reg_sect,
- sizeof (pi.gregset));
- supply_gregset (&pi.gregset);
+ 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");
}
- else if (which == 2)
+}
+
+static void
+info_proc_faults (pip, summary)
+ struct procinfo *pip;
+ int summary;
+{
+ struct trans *transp;
+
+ if (!summary)
{
- if (core_reg_size != sizeof (pi.fpregset))
+ if (ioctl (pip -> fd, PIOCGFAULT, &pip -> fltset) < 0)
{
- warning ("wrong size fpregset struct in core file");
+ print_sys_errmsg (pip -> pathname, errno);
+ error ("PIOCGFAULT failed");
}
- else
+
+ 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++)
{
- (void) memcpy ((char *) &pi.fpregset, core_reg_sect,
- sizeof (pi.fpregset));
-#if defined (FP0_REGNUM)
- supply_fpregset (&pi.fpregset);
-#endif
+ 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
+info_proc_mappings (pip, summary)
+ struct procinfo *pip;
+ int summary;
+{
+ int nmap;
+ struct prmap *prmaps;
+ struct prmap *prmap;
+
+ if (!summary)
+ {
+ 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)
+ {
+ prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
+ if (ioctl (pip -> fd, PIOCMAP, prmaps) == 0)
+ {
+ 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");
}
}
LOCAL FUNCTION
- proc_init_failed - called whenever /proc access initialization fails
+ info_proc -- implement the "info proc" command
SYNOPSIS
- static void proc_init_failed (char *why)
+ void info_proc (char *args, int from_tty)
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.
+ Implement gdb's "info proc" command by using the /proc interface
+ to print status information about any currently running process.
+
+ Examples of the use of "info proc" are:
+
+ 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
-DEFUN(proc_init_failed, (why),
- char *why)
+info_proc (args, from_tty)
+ char *args;
+ int from_tty;
{
- print_sys_errmsg (pi.pathname, errno);
- (void) kill (pi.pid, SIGKILL);
- close_proc_file ();
- error (why);
- /* NOTREACHED */
-}
+ int pid;
+ struct procinfo pii;
+ struct procinfo *pip;
+ struct cleanup *old_chain;
+ 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 */
+
+ pip = π
+
+ if (args != NULL)
+ {
+ if ((argv = buildargv (args)) == NULL)
+ {
+ nomem (0);
+ }
+ make_cleanup (freeargv, (char *) argv);
-/*
+ while (*argv != NULL)
+ {
+ 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)
+ {
+ summary = 0;
+ times = 1;
+ }
+ else if ((pii.pid = atoi (*argv)) > 0)
+ {
+ pid = pii.pid;
+ pip = &pii;
+ memset (&pii, 0, sizeof (pii));
+ 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++;
+ }
+ }
-LOCAL FUNCTION
+ /* If we don't have a valid open process at this point, then we have no
+ inferior or didn't specify a specific pid. */
- close_proc_file - close any currently open /proc entry
+ if (!pip -> valid)
+ {
+ error ("\
+No process. Start debugging a program or specify an explicit process ID.");
+ }
+ if (ioctl (pip -> fd, PIOCSTATUS, &(pip -> prstatus)) < 0)
+ {
+ print_sys_errmsg (pip -> pathname, errno);
+ error ("PIOCSTATUS failed");
+ }
-SYNOPSIS
+ /* Print verbose information of the requested type(s), or just a summary
+ of the information for all types. */
- static void close_proc_file (void)
+ 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");
-DESCRIPTION
+ /* All done, deal with closing any temporary process info structure,
+ freeing temporary memory , etc. */
- 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.
+ do_cleanups (old_chain);
+}
- */
+/* Fork an inferior process, and start debugging it with /proc. */
static void
-DEFUN_VOID(close_proc_file)
+procfs_create_inferior (exec_file, allargs, env)
+ char *exec_file;
+ char *allargs;
+ char **env;
{
- pi.pid = 0;
- if (pi.valid)
- {
- (void) close (pi.fd);
- }
- pi.fd = -1;
- if (pi.pathname)
- {
- free (pi.pathname);
- pi.pathname = NULL;
- }
- pi.valid = 0;
+ 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 */
+};
+
/*
-LOCAL FUNCTION
+GLOBAL FUNCTION
- open_proc_file - open a /proc entry for a given process id
+ _initialize_procfs -- initialize the process file system stuff
SYNOPSIS
- static int open_proc_file (pid)
+ void _initialize_procfs (void)
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.
+ Do required initializations during gdb startup for using the
+ /proc file system interface.
- 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
-DEFUN(open_proc_file, (pid),
- int pid)
+void
+_initialize_procfs ()
{
- pi.valid = 0;
- if (pi.valid)
- {
- (void) close (pi.fd);
- }
- if (pi.pathname == NULL)
- {
- pi.pathname = xmalloc (32);
- }
- sprintf (pi.pathname, PROC_NAME_FMT, pid);
- if ((pi.fd = open (pi.pathname, O_RDWR)) >= 0)
- {
- pi.valid = 1;
- pi.pid = pid;
- }
- return (pi.valid);
-}
+ 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