/* 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 <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.
- Some versions return a value, others return nothing. Some are
- declared to return a value and actually return nothing. Gdb ignores
- anything returned. (FIXME)
+ Gdb is confused about what this function is supposed to return.
+ Some versions return a value, others return nothing. Some are
+ declared to return a value and actually return nothing. Gdb ignores
+ anything returned. (FIXME)
+
+ */
+
+static void
+procfs_store_registers (regno)
+ int regno;
+{
+ if (regno != -1)
+ {
+ ioctl (pi.fd, PIOCGREG, &pi.gregset);
+ }
+ fill_gregset (&pi.gregset, regno);
+ ioctl (pi.fd, PIOCSREG, &pi.gregset);
+
+#if defined (FP0_REGNUM)
+
+ /* Now repeat everything using the floating point register set, if the
+ target has floating point hardware. Since we ignore the returned value,
+ we'll never know whether it worked or not anyway. */
+
+ if (regno != -1)
+ {
+ ioctl (pi.fd, PIOCGFPREG, &pi.fpregset);
+ }
+ fill_fpregset (&pi.fpregset, regno);
+ ioctl (pi.fd, PIOCSFPREG, &pi.fpregset);
+
+#endif /* FP0_REGNUM */
+
+}
+
+/*
+
+LOCAL FUNCTION
+
+ procfs_init_inferior - initialize access to a /proc entry
+
+SYNOPSIS
+
+ void procfs_init_inferior (int pid)
+
+DESCRIPTION
+
+ When gdb starts an inferior, this function is called in the parent
+ process immediately after the fork. It waits for the child to stop
+ on the return from the exec system call (the child itself takes care
+ of ensuring that this is set up), then sets up the set of signals
+ and faults that are to be traced.
+
+NOTES
+
+ If proc_init_failed ever gets called, control returns to the command
+ processing loop via the standard error handling code.
+
+ */
+
+static void
+procfs_init_inferior (pid)
+ int pid;
+{
+
+ push_target (&procfs_ops);
+
+ if (!open_proc_file (pid, &pi, O_RDWR))
+ {
+ proc_init_failed ("can't open process file");
+ }
+ else
+ {
+ 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, 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
+
+ void proc_set_exec_trap (void)
+
+DESCRIPTION
+
+ This function is called in the child process when starting up
+ an inferior, prior to doing the exec of the actual inferior.
+ It sets the child process's exitset to make exit from the exec
+ system call an event of interest to stop on, and then simply
+ returns. The child does the exec, the system call returns, and
+ the child stops at the first instruction, ready for the gdb
+ parent process to take control of it.
+
+NOTE
+
+ 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.
+ */
+
+static void
+proc_set_exec_trap ()
+{
+ sysset_t exitset;
+ auto char procname[32];
+ int fd;
+
+ sprintf (procname, PROC_NAME_FMT, getpid ());
+ if ((fd = open (procname, O_RDWR)) < 0)
+ {
+ perror (procname);
+ fflush (stderr);
+ _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.
+ */
+
+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
+
+ proc_base_address -- find base address for segment containing address
+
+SYNOPSIS
+
+ 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 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.");
+}
+
+/*
+
+LOCAL FUNCTION
+
+ do_attach -- attach to an already existing process
+
+SYNOPSIS
+
+ int do_attach (int pid)
+
+DESCRIPTION
+
+ Attach to an already existing process with the specified process
+ id. If the process is not already stopped, query whether to
+ stop it or not.
+
+NOTES
+
+ The option of stopping at attach time is specific to the /proc
+ versions of gdb. Versions using ptrace force the attachee
+ 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)
+
+*/
+
+static int
+do_attach (pid)
+ int pid;
+{
+ int result;
+
+ if (!open_proc_file (pid, &pi, O_RDWR))
+ {
+ perror_with_name (pi.pathname);
+ /* NOTREACHED */
+ }
+
+ /* Get current status of process and if it is not already stopped,
+ then stop it. Remember whether or not it was stopped when we first
+ examined it. */
+
+ if (ioctl (pi.fd, PIOCSTATUS, &pi.prstatus) < 0)
+ {
+ print_sys_errmsg (pi.pathname, errno);
+ close_proc_file (&pi);
+ error ("PIOCSTATUS failed");
+ }
+ if (pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
+ {
+ pi.was_stopped = 1;
+ }
+ else
+ {
+ pi.was_stopped = 0;
+ 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. */
+
+ 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. */
+
+ 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", errno);
+ }
+ if (ioctl (pi.fd, PIOCSTRACE, &pi.prrun.pr_trace))
+ {
+ print_sys_errmsg ("PIOCSTRACE failed", errno);
+ }
+ attach_flag = 1;
+ return (pid);
+}
+
+/*
+
+LOCAL FUNCTION
+
+ do_detach -- detach from an attached-to process
+
+SYNOPSIS
+
+ void do_detach (int signal)
+
+DESCRIPTION
+
+ Detach from the current attachee.
+
+ If signal is non-zero, the attachee is started running again and sent
+ the specified signal.
+
+ If signal is zero and the attachee was not already stopped when we
+ attached to it, then we make it runnable again when we detach.
+
+ Otherwise, we query whether or not to make the attachee runnable
+ again, since we may simply want to leave it in the state it was in
+ when we attached.
+ We report any problems, but do not consider them errors, since we
+ MUST detach even if some things don't seem to go right. This may not
+ be the ideal situation. (FIXME).
*/
-void
-DEFUN(store_inferior_registers, (regno),
- int regno)
+static void
+do_detach (signal)
+ int signal;
{
- if (regno != -1)
+ int result;
+
+ if (signal)
+ {
+ set_proc_siginfo (&pi, signal);
+ }
+ 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.saved_entryset) < 0)
+ {
+ print_sys_errmsg (pi.pathname, errno);
+ printf ("PIOCSENTRY failed.\n");
+ }
+ if (ioctl (pi.fd, PIOCSTRACE, &pi.saved_trace) < 0)
+ {
+ print_sys_errmsg (pi.pathname, errno);
+ printf ("PIOCSTRACE failed.\n");
+ }
+ 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 (ioctl (pi.fd, PIOCSTATUS, &pi.prstatus) < 0)
+ {
+ print_sys_errmsg (pi.pathname, errno);
+ printf ("PIOCSTATUS failed.\n");
+ }
+ else
+ {
+ if (signal || (pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
+ {
+ if (signal || !pi.was_stopped ||
+ query ("Was stopped when attached, make it runnable again? "))
+ {
+ /* 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 ("PIOCSRLC or PIOCSET failed.\n");
+ }
+ }
+ }
+ }
+ close_proc_file (&pi);
+ attach_flag = 0;
+}
+
+/*
+
+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.
+
+
+SYNOPSIS
+
+ int procfs_wait (int *statloc)
+
+DESCRIPTION
+
+ Try to emulate wait() as much as possible. Not sure why we can't
+ just use wait(), but it seems to have problems when applied to a
+ process being controlled with the /proc interface.
+
+NOTES
+
+ We have a race problem here with no obvious solution. We need to let
+ the inferior run until it stops on an event of interest, which means
+ that we need to use the PIOCWSTOP ioctl. However, we cannot use this
+ ioctl if the process is already stopped on something that is not an
+ event of interest, or the call will hang indefinitely. Thus we first
+ use PIOCSTATUS to see if the process is not stopped. If not, then we
+ use PIOCWSTOP. But during the window between the two, if the process
+ stops for any reason that is not an event of interest (such as a job
+ control signal) then gdb will hang. One possible workaround is to set
+ an alarm to wake up every minute of so and check to see if the process
+ is still running, and if so, then reissue the PIOCWSTOP. But this is
+ a real kludge, so has not been implemented. FIXME: investigate
+ alternatives.
+
+ FIXME: Investigate why wait() seems to have problems with programs
+ being control by /proc routines.
+
+ */
+
+static int
+procfs_wait (statloc)
+ int *statloc;
+{
+ short what;
+ short why;
+ int statval = 0;
+ int checkerr = 0;
+ int rtnval = -1;
+
+ if (ioctl (pi.fd, PIOCSTATUS, &pi.prstatus) < 0)
+ {
+ checkerr++;
+ }
+ else if (!(pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
+ {
+ 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)
+ {
+ if (errno == ENOENT)
+ {
+ rtnval = wait (&statval);
+ if (rtnval != inferior_pid)
+ {
+ print_sys_errmsg (pi.pathname, errno);
+ error ("PIOCWSTOP, wait failed, returned %d", rtnval);
+ /* NOTREACHED */
+ }
+ }
+ else
+ {
+ print_sys_errmsg (pi.pathname, errno);
+ error ("PIOCSTATUS or PIOCWSTOP failed.");
+ /* NOTREACHED */
+ }
+ }
+ else if (pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
+ {
+ rtnval = pi.prstatus.pr_pid;
+ why = pi.prstatus.pr_why;
+ what = pi.prstatus.pr_what;
+ if (why == PR_SIGNALLED)
+ {
+ statval = (what << 8) | 0177;
+ }
+ 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 if (why == PR_REQUESTED)
+ {
+ statval = (SIGSTOP << 8) | 0177;
+ }
+ else if (why == PR_JOBCONTROL)
+ {
+ statval = (what << 8) | 0177;
+ }
+ else if (why == PR_FAULTED)
+ {
+ switch (what)
+ {
+ case FLTPRIV:
+ case FLTILL:
+ statval = (SIGILL << 8) | 0177;
+ break;
+ case FLTBPT:
+ case FLTTRACE:
+ statval = (SIGTRAP << 8) | 0177;
+ break;
+ case FLTSTACK:
+ case FLTACCESS:
+ case FLTBOUNDS:
+ statval = (SIGSEGV << 8) | 0177;
+ break;
+ case FLTIOVF:
+ case FLTIZDIV:
+ case FLTFPE:
+ statval = (SIGFPE << 8) | 0177;
+ break;
+ case FLTPAGE: /* Recoverable page fault */
+ default:
+ rtnval = -1;
+ error ("PIOCWSTOP, unknown why %d, what %d", why, what);
+ /* NOTREACHED */
+ }
+ }
+ else
+ {
+ rtnval = -1;
+ error ("PIOCWSTOP, unknown why %d, what %d", why, what);
+ /* NOTREACHED */
+ }
+ }
+ else
{
- (void) ioctl (pi.fd, PIOCGREG, &pi.gregset);
+ error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
+ pi.prstatus.pr_flags);
+ /* NOTREACHED */
}
- fill_gregset (&pi.gregset, regno);
- (void) ioctl (pi.fd, PIOCSREG, &pi.gregset);
-
-#if defined (FP0_REGNUM)
-
- /* Now repeat everything using the floating point register set, if the
- target has floating point hardware. Since we ignore the returned value,
- we'll never know whether it worked or not anyway. */
- if (regno != -1)
+ if (statloc)
{
- (void) ioctl (pi.fd, PIOCGFPREG, &pi.fpregset);
+ *statloc = statval;
}
- fill_fpregset (&pi.fpregset, regno);
- (void) ioctl (pi.fd, PIOCSFPREG, &pi.fpregset);
-#endif /* FP0_REGNUM */
+ 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);
}
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
- inferior_proc_init - initialize access to a /proc entry
+ set_proc_siginfo - set a process's current signal info
SYNOPSIS
- void inferior_proc_init (int pid)
+ void set_proc_siginfo (struct procinfo *pip, int signo);
DESCRIPTION
- When gdb starts an inferior, this function is called in the parent
- process immediately after the fork. It waits for the child to stop
- on the return from the exec system call (the child itself takes care
- of ensuring that this is set up), then sets up the set of signals
- and faults that are to be traced.
-
-NOTES
-
- If proc_init_failed ever gets called, control returns to the command
- processing loop via the standard error handling code.
- */
+ 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.
+*/
-void
-DEFUN(inferior_proc_init, (int pid),
- int pid)
+static void
+set_proc_siginfo (pip, signo)
+ struct procinfo *pip;
+ int signo;
{
- if (!open_proc_file (pid))
- {
- proc_init_failed ("can't open process file");
- }
- else
+ struct siginfo newsiginfo;
+ struct siginfo *sip;
+
+ if (pip -> valid)
{
- (void) memset (&pi.prrun, 0, sizeof (pi.prrun));
- prfillset (&pi.prrun.pr_trace);
- prfillset (&pi.prrun.pr_fault);
- prdelset (&pi.prrun.pr_fault, FLTPAGE);
- if (ioctl (pi.fd, PIOCWSTOP, &pi.prstatus) < 0)
+ if (signo == pip -> prstatus.pr_info.si_signo)
{
- proc_init_failed ("PIOCWSTOP failed");
+ sip = &pip -> prstatus.pr_info;
}
- else if (ioctl (pi.fd, PIOCSTRACE, &pi.prrun.pr_trace) < 0)
+ else
{
- proc_init_failed ("PIOCSTRACE failed");
+ 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 ();
}
- else if (ioctl (pi.fd, PIOCSFAULT, &pi.prrun.pr_fault) < 0)
+ if (ioctl (pip -> fd, PIOCSSIG, sip) < 0)
{
- proc_init_failed ("PIOCSFAULT failed");
+ print_sys_errmsg (pip -> pathname, errno);
+ warning ("PIOCSSIG failed");
}
}
}
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
- proc_set_exec_trap -- arrange for exec'd child to halt at startup
+ procfs_resume -- resume execution of the inferior process
SYNOPSIS
- void proc_set_exec_trap (void)
+ void procfs_resume (int step, int signo)
DESCRIPTION
- This function is called in the child process when starting up
- an inferior, prior to doing the exec of the actual inferior.
- It sets the child process's exitset to make exit from the exec
- system call an event of interest to stop on, and then simply
- returns. The child does the exec, the system call returns, and
- the child stops at the first instruction, ready for the gdb
- parent process to take control of it.
+ 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.
NOTE
- 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.
+ 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.
+
+ 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
-DEFUN_VOID(proc_set_exec_trap)
+static void
+procfs_resume (step, signo)
+ int step;
+ int signo;
{
- sysset_t exitset;
- auto char procname[32];
- int fd;
-
- (void) sprintf (procname, PROC_NAME_FMT, getpid ());
- if ((fd = open (procname, O_RDWR)) < 0)
+ errno = 0;
+ 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)];
+ pi.prrun.pr_flags != PRSVADDR;
+#endif
+
+ if (signo && !(signo == SIGSTOP && pi.nopass_next_sigstop))
{
- perror (procname);
- fflush (stderr);
- _exit (127);
+ set_proc_siginfo (&pi, signo);
}
- premptyset (&exitset);
- praddset (&exitset, SYS_exec);
- praddset (&exitset, SYS_execve);
- if (ioctl (fd, PIOCSEXIT, &exitset) < 0)
+ else
{
- perror (procname);
- fflush (stderr);
- _exit (127);
+ pi.prrun.pr_flags |= PRCSIG;
}
-}
-
-/*
-
-GLOBAL FUNCTION
-
- proc_base_address -- find base address for segment containing address
-
-SYNOPSIS
-
- 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
-DEFUN(proc_base_address, (addr),
- CORE_ADDR addr)
-{
- int nmap;
- struct prmap *prmaps;
- struct prmap *prmap;
- CORE_ADDR baseaddr = 0;
-
- if (ioctl (pi.fd, PIOCNMAP, &nmap) == 0)
+ pi.nopass_next_sigstop = 0;
+ if (step)
{
- prmaps = 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;
- }
- }
- }
+ pi.prrun.pr_flags |= PRSTEP;
+ }
+ if (ioctl (pi.fd, PIOCRUN, &pi.prrun) != 0)
+ {
+ perror_with_name (pi.pathname);
+ /* NOTREACHED */
}
- return (baseaddr);
}
/*
-GLOBAL_FUNCTION
+LOCAL FUNCTION
- proc_address_to_fd -- return open fd for file mapped to address
+ procfs_fetch_registers -- fetch current registers from inferior
SYNOPSIS
- int proc_address_to_fd (CORE_ADDR addr)
+ void procfs_fetch_registers (int regno)
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).
+ 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.
*/
-int
-DEFUN(proc_address_to_fd, (addr),
- CORE_ADDR addr)
+static void
+procfs_fetch_registers (regno)
+ int regno;
{
- int fd = -1;
-
- if (pi.valid)
+ if (ioctl (pi.fd, PIOCGREG, &pi.gregset) != -1)
{
- if ((fd = ioctl (pi.fd, PIOCOPENM, (caddr_t *) &addr)) < 0)
- {
- print_sys_errmsg (pi.pathname, errno);
- warning ("can't find mapped file for address 0x%x", addr);
- }
+ supply_gregset (&pi.gregset);
}
- return (fd);
+#if defined (FP0_REGNUM)
+ if (ioctl (pi.fd, PIOCGFPREG, &pi.fpregset) != -1)
+ {
+ supply_fpregset (&pi.fpregset);
+ }
+#endif
}
-
-#ifdef ATTACH_DETACH
-
/*
GLOBAL FUNCTION
- attach -- attach to an already existing process
+ fetch_core_registers -- fetch current registers from core file data
SYNOPSIS
- int attach (int pid)
+ void fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
+ int which, unsigned in reg_addr)
DESCRIPTION
- Attach to an already existing process with the specified process
- id. If the process is not already stopped, query whether to
- stop it or not.
+ 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
- The option of stopping at attach time is specific to the /proc
- versions of gdb. Versions using ptrace force the attachee
- to stop.
-
+ Use the indicated sizes to validate the gregset and fpregset
+ structures.
*/
-int
-DEFUN(attach, (pid),
- int pid)
+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 (!open_proc_file (pid))
- {
- perror_with_name (pi.pathname);
- /* NOTREACHED */
- }
-
- /* Get current status of process and if it is not already stopped,
- then stop it. Remember whether or not it was stopped when we first
- examined it. */
-
- if (ioctl (pi.fd, PIOCSTATUS, &pi.prstatus) < 0)
- {
- print_sys_errmsg (pi.pathname, errno);
- close_proc_file ();
- error ("PIOCSTATUS failed");
- }
- if (pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
- {
- pi.was_stopped = 1;
- }
- else
+
+ if (which == 0)
{
- pi.was_stopped = 0;
- if (query ("Process is currently running, stop it? "))
+ if (core_reg_size != sizeof (pi.gregset))
{
- if (ioctl (pi.fd, PIOCSTOP, &pi.prstatus) < 0)
- {
- print_sys_errmsg (pi.pathname, errno);
- close_proc_file ();
- error ("PIOCSTOP failed");
- }
+ warning ("wrong size gregset struct in core file");
+ }
+ else
+ {
+ memcpy ((char *) &pi.gregset, core_reg_sect, sizeof (pi.gregset));
+ supply_gregset (&pi.gregset);
}
}
-
- /* 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);
-
- /* Set up trace and fault sets, as gdb expects them. */
-
- (void) memset (&pi.prrun, 0, sizeof (pi.prrun));
- prfillset (&pi.prrun.pr_trace);
- prfillset (&pi.prrun.pr_fault);
- prdelset (&pi.prrun.pr_fault, FLTPAGE);
- if (ioctl (pi.fd, PIOCSFAULT, &pi.prrun.pr_fault))
- {
- print_sys_errmsg ("PIOCSFAULT failed");
- }
- if (ioctl (pi.fd, PIOCSTRACE, &pi.prrun.pr_trace))
+ else if (which == 2)
{
- print_sys_errmsg ("PIOCSTRACE failed");
+ if (core_reg_size != sizeof (pi.fpregset))
+ {
+ warning ("wrong size fpregset struct in core file");
+ }
+ else
+ {
+ memcpy ((char *) &pi.fpregset, core_reg_sect, sizeof (pi.fpregset));
+#if defined (FP0_REGNUM)
+ supply_fpregset (&pi.fpregset);
+#endif
+ }
}
- attach_flag = 1;
- return (pid);
}
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
- detach -- detach from an attached-to process
+ proc_init_failed - called whenever /proc access initialization fails
SYNOPSIS
- void detach (int signal)
+ static void proc_init_failed (char *why)
DESCRIPTION
- Detach from the current attachee.
+ 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.
+ */
- If signal is non-zero, the attachee is started running again and sent
- the specified signal.
+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 */
+}
- If signal is zero and the attachee was not already stopped when we
- attached to it, then we make it runnable again when we detach.
+/*
- Otherwise, we query whether or not to make the attachee runnable
- again, since we may simply want to leave it in the state it was in
- when we attached.
+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.
- We report any problems, but do not consider them errors, since we
- MUST detach even if some things don't seem to go right. This may not
- be the ideal situation. (FIXME).
*/
-void
-DEFUN(detach, (signal),
- int signal)
+static void
+close_proc_file (pip)
+ struct procinfo *pip;
{
- 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");
- }
- }
- if (ioctl (pi.fd, PIOCSEXIT, &pi.exitset) < 0)
- {
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCSEXIT failed.\n");
- }
- if (ioctl (pi.fd, PIOCSENTRY, &pi.entryset) < 0)
- {
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCSENTRY failed.\n");
- }
- if (ioctl (pi.fd, PIOCSTRACE, &pi.trace) < 0)
- {
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCSTRACE failed.\n");
- }
- if (ioctl (pi.fd, PIOCSFAULT, &pi.fltset) < 0)
- {
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCSFAULT failed.\n");
- }
- if (ioctl (pi.fd, PIOCSTATUS, &pi.prstatus) < 0)
+ pip -> pid = 0;
+ if (pip -> valid)
{
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCSTATUS failed.\n");
+ close (pip -> fd);
}
- else
+ pip -> fd = -1;
+ if (pip -> pathname)
{
- if (signal || (pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
- {
- 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))
- {
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCRUN failed.\n");
- }
- }
- }
+ free (pip -> pathname);
+ pip -> pathname = NULL;
}
- close_proc_file ();
- attach_flag = 0;
+ pip -> valid = 0;
}
-#endif /* ATTACH_DETACH */
-
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
- proc_wait -- emulate wait() as much as possible
+ open_proc_file - open a /proc entry for a given process id
SYNOPSIS
- int proc_wait (int *statloc)
+ static int open_proc_file (int pid, struct procinfo *pip, int mode)
DESCRIPTION
- Try to emulate wait() as much as possible. Not sure why we can't
- just use wait(), but it seems to have problems when applied to a
- process being controlled with the /proc interface.
-
-NOTES
-
- We have a race problem here with no obvious solution. We need to let
- the inferior run until it stops on an event of interest, which means
- that we need to use the PIOCWSTOP ioctl. However, we cannot use this
- ioctl if the process is already stopped on something that is not an
- event of interest, or the call will hang indefinitely. Thus we first
- use PIOCSTATUS to see if the process is not stopped. If not, then we
- use PIOCWSTOP. But during the window between the two, if the process
- stops for any reason that is not an event of interest (such as a job
- control signal) then gdb will hang. One possible workaround is to set
- an alarm to wake up every minute of so and check to see if the process
- is still running, and if so, then reissue the PIOCWSTOP. But this is
- a real kludge, so has not been implemented. FIXME: investigate
- alternatives.
-
- FIXME: Investigate why wait() seems to have problems with programs
- being control by /proc routines.
+ 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".
*/
-int
-DEFUN(proc_wait, (statloc),
- int *statloc)
+static int
+open_proc_file (pid, pip, mode)
+ int pid;
+ struct procinfo *pip;
+ int mode;
{
- short what;
- short why;
- int statval = 0;
- int checkerr = 0;
- int rtnval = -1;
-
- if (ioctl (pi.fd, PIOCSTATUS, &pi.prstatus) < 0)
+ pip -> valid = 0; /* FIXME, what is this? ?! */
+ if (pip -> valid)
{
- checkerr++;
+ close (pip -> fd);
}
- else if (!(pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
+ if (pip -> pathname == NULL)
{
- if (ioctl (pi.fd, PIOCWSTOP, &pi.prstatus) < 0)
- {
- checkerr++;
- }
- }
- if (checkerr)
+ pip -> pathname = xmalloc (32);
+ }
+ sprintf (pip -> pathname, PROC_NAME_FMT, pid);
+ if ((pip -> fd = open (pip -> pathname, mode)) >= 0)
{
- if (errno == ENOENT)
+ 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)
{
- rtnval = wait (&statval);
- if (rtnval != inferior_pid)
+ if (summary)
{
- error ("PIOCWSTOP, wait failed, returned %d", rtnval);
- /* NOTREACHED */
+ printf_filtered ("%s ", transp -> name);
+ }
+ else
+ {
+ printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc);
}
- }
- else
- {
- print_sys_errmsg (pi.pathname, errno);
- error ("PIOCSTATUS or PIOCWSTOP failed.");
- /* NOTREACHED */
}
}
- else if (pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
+ 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)
{
- rtnval = pi.prstatus.pr_pid;
- why = pi.prstatus.pr_why;
- what = pi.prstatus.pr_what;
- if (why == PR_SIGNALLED)
- {
- statval = (what << 8) | 0177;
- }
- else if ((why == PR_SYSEXIT) &&
- (what == SYS_exec || what == SYS_execve))
+ printf_filtered ("%-32s", "Reason for stopping:");
+ if (!summary)
{
- statval = (SIGTRAP << 8) | 0177;
+ printf_filtered ("\n\n");
}
- else if (why == PR_REQUESTED)
+ for (transp = pr_why_table; transp -> name != NULL; transp++)
{
- statval = (SIGSTOP << 8) | 0177;
+ if (why == transp -> value)
+ {
+ if (summary)
+ {
+ printf_filtered ("%s ", transp -> name);
+ }
+ else
+ {
+ printf_filtered ("\t%-16s %s.\n",
+ transp -> name, transp -> desc);
+ }
+ break;
+ }
}
- else if (why == PR_JOBCONTROL)
+
+ /* Use the pr_why field to determine what the pr_what field means, and
+ print more information. */
+
+ switch (why)
{
- statval = (what << 8) | 0177;
- }
- else if (why == PR_FAULTED)
+ 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)
{
- switch (what)
+ printf_filtered ("%s ", signalname (sip -> si_signo));
+ if (sip -> si_errno > 0)
{
- case FLTPRIV:
- case FLTILL:
- statval = (SIGILL << 8) | 0177;
- break;
- case FLTBPT:
- case FLTTRACE:
- statval = (SIGTRAP << 8) | 0177;
- break;
- case FLTSTACK:
- case FLTACCESS:
- case FLTBOUNDS:
- statval = (SIGSEGV << 8) | 0177;
- break;
- case FLTIOVF:
- case FLTIZDIV:
- case FLTFPE:
- statval = (SIGFPE << 8) | 0177;
- break;
- case FLTPAGE: /* Recoverable page fault */
- default:
- rtnval = -1;
- error ("PIOCWSTOP, unknown why %d, what %d", why, what);
- /* NOTREACHED */
+ printf_filtered ("%s ", errnoname (sip -> si_errno));
+ }
+ if (sip -> si_code <= 0)
+ {
+ printf_filtered ("sent by pid %d, uid %d ", 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 pid %u, status %u ",
+ sip -> si_pid,
+ sip -> si_status);
+ }
+ else if ((sip -> si_signo == SIGPOLL))
+ {
+ printf_filtered ("band %u ", sip -> si_band);
+ }
}
}
else
{
- 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;
+ 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,
+ "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,
+ "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");
}
- 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. Run an inferior or specify an explicit pid.");
+ }
+ 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