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- /* Machine independent support for SVR4 /proc (process file system) for GDB.
- Copyright 1991, 1992 Free Software Foundation, Inc.
- Written by Fred Fish at Cygnus Support.
-
- This file is part of GDB.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-
- /* N O T E S
-
- For information on the details of using /proc consult section proc(4)
- in the UNIX System V Release 4 System Administrator's Reference Manual.
-
- The general register and floating point register sets are manipulated by
- separate ioctl's. This file makes the assumption that if FP0_REGNUM is
- defined, then support for the floating point register set is desired,
- regardless of whether or not the actual target has floating point hardware.
-
- */
-
-
- #include "defs.h"
-
- #include <time.h>
- #include <sys/procfs.h>
- #include <fcntl.h>
- #include <errno.h>
- #include <string.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/%05d"
- #endif
-
- extern struct target_ops procfs_ops; /* Forward declaration */
-
- #if 1 /* FIXME: Gross and ugly hack to resolve coredep.c global */
- CORE_ADDR kernel_u_addr;
- #endif
-
- #ifdef BROKEN_SIGINFO_H /* Workaround broken SGS <sys/siginfo.h> */
- #undef si_pid
- #define si_pid _data._proc.pid
- #undef si_uid
- #define si_uid _data._proc._pdata._kill.uid
- #endif /* BROKEN_SIGINFO_H */
-
- /* All access to the inferior, either one started by gdb or one that has
- been attached to, is controlled by an instance of a procinfo structure,
- defined below. Since gdb currently only handles one inferior at a time,
- the 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 pid; /* Process ID of inferior */
- 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 */
- fpregset_t fpregset; /* Floating point register set */
- fltset_t fltset; /* Current traced hardware fault set */
- sigset_t trace; /* Current traced signal set */
- sysset_t exitset; /* Current traced system call exit set */
- sysset_t entryset; /* Current traced system call entry set */
- fltset_t saved_fltset; /* Saved traced hardware fault set */
- sigset_t saved_trace; /* Saved traced signal set */
- sigset_t saved_sighold; /* Saved held signal set */
- sysset_t saved_exitset; /* Saved traced system call exit set */
- sysset_t saved_entryset; /* Saved traced system call entry set */
- };
-
- static struct procinfo pi; /* Inferior's process information */
-
- /* Much of the information used in the /proc interface, particularly for
- printing status information, is kept as tables of structures of the
- following form. These tables can be used to map numeric values to
- their symbolic names and to a string that describes their specific use. */
-
- struct trans {
- int value; /* The numeric value */
- char *name; /* The equivalent symbolic value */
- char *desc; /* Short description of value */
- };
-
- /* Translate bits in the pr_flags member of the prstatus structure, into the
- names and desc information. */
-
- static struct trans pr_flag_table[] =
- {
- #if defined (PR_STOPPED)
- PR_STOPPED, "PR_STOPPED", "Process is stopped",
- #endif
- #if defined (PR_ISTOP)
- PR_ISTOP, "PR_ISTOP", "Stopped on an event of interest",
- #endif
- #if defined (PR_DSTOP)
- PR_DSTOP, "PR_DSTOP", "A stop directive is in effect",
- #endif
- #if defined (PR_ASLEEP)
- PR_ASLEEP, "PR_ASLEEP", "Sleeping in an interruptible system call",
- #endif
- #if defined (PR_FORK)
- PR_FORK, "PR_FORK", "Inherit-on-fork is in effect",
- #endif
- #if defined (PR_RLC)
- PR_RLC, "PR_RLC", "Run-on-last-close is in effect",
- #endif
- #if defined (PR_PTRACE)
- PR_PTRACE, "PR_PTRACE", "Process is being controlled by ptrace",
- #endif
- #if defined (PR_PCINVAL)
- PR_PCINVAL, "PR_PCINVAL", "PC refers to an invalid virtual address",
- #endif
- #if defined (PR_ISSYS)
- PR_ISSYS, "PR_ISSYS", "Is a system process",
- #endif
- #if defined (PR_STEP)
- PR_STEP, "PR_STEP", "Process has single step pending",
- #endif
- #if defined (PR_KLC)
- PR_KLC, "PR_KLC", "Kill-on-last-close is in effect",
- #endif
- #if defined (PR_ASYNC)
- PR_ASYNC, "PR_ASYNC", "Asynchronous stop is in effect",
- #endif
- #if defined (PR_PCOMPAT)
- PR_PCOMPAT, "PR_PCOMPAT", "Ptrace compatibility mode in effect",
- #endif
- 0, NULL, NULL
- };
-
- /* Translate values in the pr_why field of the prstatus struct. */
-
- static struct trans pr_why_table[] =
- {
- #if defined (PR_REQUESTED)
- PR_REQUESTED, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP",
- #endif
- #if defined (PR_SIGNALLED)
- PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal",
- #endif
- #if defined (PR_FAULTED)
- PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault",
- #endif
- #if defined (PR_SYSENTRY)
- PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call",
- #endif
- #if defined (PR_SYSEXIT)
- PR_SYSEXIT, "PR_SYSEXIT", "Exit from a traced system call",
- #endif
- #if defined (PR_JOBCONTROL)
- PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action",
- #endif
- #if defined (PR_SUSPENDED)
- PR_SUSPENDED, "PR_SUSPENDED", "Process suspended",
- #endif
- 0, NULL, NULL
- };
-
- /* Hardware fault translation table. */
-
- static struct trans faults_table[] =
- {
- #if defined (FLTILL)
- FLTILL, "FLTILL", "Illegal instruction",
- #endif
- #if defined (FLTPRIV)
- FLTPRIV, "FLTPRIV", "Privileged instruction",
- #endif
- #if defined (FLTBPT)
- FLTBPT, "FLTBPT", "Breakpoint trap",
- #endif
- #if defined (FLTTRACE)
- FLTTRACE, "FLTTRACE", "Trace trap",
- #endif
- #if defined (FLTACCESS)
- FLTACCESS, "FLTACCESS", "Memory access fault",
- #endif
- #if defined (FLTBOUNDS)
- FLTBOUNDS, "FLTBOUNDS", "Memory bounds violation",
- #endif
- #if defined (FLTIOVF)
- FLTIOVF, "FLTIOVF", "Integer overflow",
- #endif
- #if defined (FLTIZDIV)
- FLTIZDIV, "FLTIZDIV", "Integer zero divide",
- #endif
- #if defined (FLTFPE)
- FLTFPE, "FLTFPE", "Floating-point exception",
- #endif
- #if defined (FLTSTACK)
- FLTSTACK, "FLTSTACK", "Unrecoverable stack fault",
- #endif
- #if defined (FLTPAGE)
- FLTPAGE, "FLTPAGE", "Recoverable page fault",
- #endif
- 0, NULL, NULL
- };
-
- /* Translation table for signal generation information. See UNIX System
- V Release 4 Programmer's Reference Manual, siginfo(5). */
-
- static struct sigcode {
- int signo;
- int code;
- char *codename;
- char *desc;
- } siginfo_table[] = {
- #if defined (SIGILL) && defined (ILL_ILLOPC)
- SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode",
- #endif
- #if defined (SIGILL) && defined (ILL_ILLOPN)
- SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand",
- #endif
- #if defined (SIGILL) && defined (ILL_ILLADR)
- SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode",
- #endif
- #if defined (SIGILL) && defined (ILL_ILLTRP)
- SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap",
- #endif
- #if defined (SIGILL) && defined (ILL_PRVOPC)
- SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode",
- #endif
- #if defined (SIGILL) && defined (ILL_PRVREG)
- SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register",
- #endif
- #if defined (SIGILL) && defined (ILL_COPROC)
- SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error",
- #endif
- #if defined (SIGILL) && defined (ILL_BADSTK)
- SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error",
- #endif
- #if defined (SIGFPE) && defined (FPE_INTDIV)
- SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero",
- #endif
- #if defined (SIGFPE) && defined (FPE_INTOVF)
- SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow",
- #endif
- #if defined (SIGFPE) && defined (FPE_FLTDIV)
- SIGFPE, FPE_FLTDIV, "FPE_FLTDIV", "Floating point divide by zero",
- #endif
- #if defined (SIGFPE) && defined (FPE_FLTOVF)
- SIGFPE, FPE_FLTOVF, "FPE_FLTOVF", "Floating point overflow",
- #endif
- #if defined (SIGFPE) && defined (FPE_FLTUND)
- SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating point underflow",
- #endif
- #if defined (SIGFPE) && defined (FPE_FLTRES)
- SIGFPE, FPE_FLTRES, "FPE_FLTRES", "Floating point inexact result",
- #endif
- #if defined (SIGFPE) && defined (FPE_FLTINV)
- SIGFPE, FPE_FLTINV, "FPE_FLTINV", "Invalid floating point operation",
- #endif
- #if defined (SIGFPE) && defined (FPE_FLTSUB)
- SIGFPE, FPE_FLTSUB, "FPE_FLTSUB", "Subscript out of range",
- #endif
- #if defined (SIGSEGV) && defined (SEGV_MAPERR)
- SIGSEGV, SEGV_MAPERR, "SEGV_MAPERR", "Address not mapped to object",
- #endif
- #if defined (SIGSEGV) && defined (SEGV_ACCERR)
- SIGSEGV, SEGV_ACCERR, "SEGV_ACCERR", "Invalid permissions for object",
- #endif
- #if defined (SIGBUS) && defined (BUS_ADRALN)
- SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment",
- #endif
- #if defined (SIGBUS) && defined (BUS_ADRERR)
- SIGBUS, BUS_ADRERR, "BUS_ADRERR", "Non-existent physical address",
- #endif
- #if defined (SIGBUS) && defined (BUS_OBJERR)
- SIGBUS, BUS_OBJERR, "BUS_OBJERR", "Object specific hardware error",
- #endif
- #if defined (SIGTRAP) && defined (TRAP_BRKPT)
- SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint",
- #endif
- #if defined (SIGTRAP) && defined (TRAP_TRACE)
- SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap",
- #endif
- #if defined (SIGCLD) && defined (CLD_EXITED)
- SIGCLD, CLD_EXITED, "CLD_EXITED", "Child has exited",
- #endif
- #if defined (SIGCLD) && defined (CLD_KILLED)
- SIGCLD, CLD_KILLED, "CLD_KILLED", "Child was killed",
- #endif
- #if defined (SIGCLD) && defined (CLD_DUMPED)
- SIGCLD, CLD_DUMPED, "CLD_DUMPED", "Child has terminated abnormally",
- #endif
- #if defined (SIGCLD) && defined (CLD_TRAPPED)
- SIGCLD, CLD_TRAPPED, "CLD_TRAPPED", "Traced child has trapped",
- #endif
- #if defined (SIGCLD) && defined (CLD_STOPPED)
- SIGCLD, CLD_STOPPED, "CLD_STOPPED", "Child has stopped",
- #endif
- #if defined (SIGCLD) && defined (CLD_CONTINUED)
- SIGCLD, CLD_CONTINUED, "CLD_CONTINUED", "Stopped child had continued",
- #endif
- #if defined (SIGPOLL) && defined (POLL_IN)
- SIGPOLL, POLL_IN, "POLL_IN", "Input input available",
- #endif
- #if defined (SIGPOLL) && defined (POLL_OUT)
- SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available",
- #endif
- #if defined (SIGPOLL) && defined (POLL_MSG)
- SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available",
- #endif
- #if defined (SIGPOLL) && defined (POLL_ERR)
- SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error",
- #endif
- #if defined (SIGPOLL) && defined (POLL_PRI)
- SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available",
- #endif
- #if defined (SIGPOLL) && defined (POLL_HUP)
- SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected",
- #endif
- 0, 0, NULL, NULL
- };
-
- static char *syscall_table[MAX_SYSCALLS];
-
- /* Prototypes for local functions */
-
- static void
- set_proc_siginfo PARAMS ((struct procinfo *, int));
-
- static void
- init_syscall_table PARAMS ((void));
-
- static char *
- syscallname PARAMS ((int));
-
- static char *
- signalname PARAMS ((int));
-
- static char *
- errnoname PARAMS ((int));
-
- static int
- proc_address_to_fd PARAMS ((CORE_ADDR, int));
-
- static int
- open_proc_file PARAMS ((int, struct procinfo *, int));
-
- static void
- close_proc_file PARAMS ((struct procinfo *));
-
- static void
- unconditionally_kill_inferior PARAMS ((void));
-
- static void
- proc_init_failed PARAMS ((char *));
-
- static void
- info_proc PARAMS ((char *, int));
-
- static void
- info_proc_flags PARAMS ((struct procinfo *, int));
-
- static void
- info_proc_stop PARAMS ((struct procinfo *, int));
-
- static void
- info_proc_siginfo PARAMS ((struct procinfo *, int));
-
- static void
- info_proc_syscalls PARAMS ((struct procinfo *, int));
-
- static void
- info_proc_mappings PARAMS ((struct procinfo *, int));
-
- static void
- info_proc_signals PARAMS ((struct procinfo *, int));
-
- static void
- info_proc_faults PARAMS ((struct procinfo *, int));
-
- static char *
- mappingflags PARAMS ((long));
-
- static char *
- lookupname PARAMS ((struct trans *, unsigned int, char *));
-
- static char *
- lookupdesc PARAMS ((struct trans *, unsigned int));
-
- static int
- do_attach PARAMS ((int pid));
-
- static void
- do_detach PARAMS ((int siggnal));
-
- static void
- procfs_create_inferior PARAMS ((char *, char *, char **));
-
- static void
- procfs_notice_signals PARAMS ((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;
- {
- char *desc;
-
- for (desc = NULL; transp -> name != NULL; transp++)
- {
- 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
-
- lookupname -- translate a value to symbolic name
-
- SYNOPSIS
-
- 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.
- */
-
- static char *
- lookupname (transp, val, prefix)
- struct trans *transp;
- unsigned int val;
- char *prefix;
- {
- static char *locbuf;
- char *name;
-
- for (name = NULL; transp -> name != NULL; transp++)
- {
- if (transp -> value == val)
- {
- name = transp -> name;
- break;
- }
- }
-
- /* Didn't find a translation for the specified value, build a default
- one using the specified prefix and return it. The lifetime of
- the value is only until the next one is needed. */
-
- if (name == NULL)
- {
- if (locbuf != NULL)
- {
- free (locbuf);
- }
- locbuf = xmalloc (strlen (prefix) + 16);
- sprintf (locbuf, "%s %u", prefix, val);
- name = locbuf;
- }
- return (name);
- }
-
- static char *
- sigcodename (sip)
- siginfo_t *sip;
- {
- struct sigcode *scp;
- char *name = NULL;
- static char locbuf[32];
-
- for (scp = siginfo_table; scp -> codename != NULL; scp++)
- {
- if ((scp -> signo == sip -> si_signo) &&
- (scp -> code == sip -> si_code))
- {
- name = scp -> codename;
- break;
- }
- }
- if (name == NULL)
- {
- sprintf (locbuf, "sigcode %u", sip -> si_signo);
- name = locbuf;
- }
- return (name);
- }
-
- static char *
- sigcodedesc (sip)
- siginfo_t *sip;
- {
- struct sigcode *scp;
- char *desc = NULL;
-
- for (scp = siginfo_table; scp -> codename != NULL; scp++)
- {
- if ((scp -> signo == sip -> si_signo) &&
- (scp -> code == sip -> si_code))
- {
- desc = scp -> desc;
- break;
- }
- }
- if (desc == NULL)
- {
- desc = "Unrecognized signal or trap use";
- }
- return (desc);
- }
-
- /*
-
- LOCAL FUNCTION
-
- syscallname - translate a system call number into a system call name
-
- SYNOPSIS
-
- char *syscallname (int syscallnum)
-
- DESCRIPTION
-
- Given a system call number, translate it into the printable name
- of a system call, or into "syscall <num>" if it is an unknown
- number.
- */
-
- static char *
- syscallname (syscallnum)
- int syscallnum;
- {
- static char locbuf[32];
- char *rtnval;
-
- if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS)
- {
- rtnval = syscall_table[syscallnum];
- }
- else
- {
- sprintf (locbuf, "syscall %u", syscallnum);
- rtnval = locbuf;
- }
- return (rtnval);
- }
-
- /*
-
- LOCAL FUNCTION
-
- init_syscall_table - initialize syscall translation table
-
- SYNOPSIS
-
- void init_syscall_table (void)
-
- DESCRIPTION
-
- Dynamically initialize the translation table to convert system
- call numbers into printable system call names. Done once per
- gdb run, on initialization.
-
- NOTES
-
- This is awfully ugly, but preprocessor tricks to make it prettier
- tend to be nonportable.
- */
-
- static void
- init_syscall_table ()
- {
- #if defined (SYS_exit)
- syscall_table[SYS_exit] = "exit";
- #endif
- #if defined (SYS_fork)
- syscall_table[SYS_fork] = "fork";
- #endif
- #if defined (SYS_read)
- syscall_table[SYS_read] = "read";
- #endif
- #if defined (SYS_write)
- syscall_table[SYS_write] = "write";
- #endif
- #if defined (SYS_open)
- syscall_table[SYS_open] = "open";
- #endif
- #if defined (SYS_close)
- syscall_table[SYS_close] = "close";
- #endif
- #if defined (SYS_wait)
- syscall_table[SYS_wait] = "wait";
- #endif
- #if defined (SYS_creat)
- syscall_table[SYS_creat] = "creat";
- #endif
- #if defined (SYS_link)
- syscall_table[SYS_link] = "link";
- #endif
- #if defined (SYS_unlink)
- syscall_table[SYS_unlink] = "unlink";
- #endif
- #if defined (SYS_exec)
- syscall_table[SYS_exec] = "exec";
- #endif
- #if defined (SYS_execv)
- syscall_table[SYS_execv] = "execv";
- #endif
- #if defined (SYS_execve)
- syscall_table[SYS_execve] = "execve";
- #endif
- #if defined (SYS_chdir)
- syscall_table[SYS_chdir] = "chdir";
- #endif
- #if defined (SYS_time)
- syscall_table[SYS_time] = "time";
- #endif
- #if defined (SYS_mknod)
- syscall_table[SYS_mknod] = "mknod";
- #endif
- #if defined (SYS_chmod)
- syscall_table[SYS_chmod] = "chmod";
- #endif
- #if defined (SYS_chown)
- syscall_table[SYS_chown] = "chown";
- #endif
- #if defined (SYS_brk)
- syscall_table[SYS_brk] = "brk";
- #endif
- #if defined (SYS_stat)
- syscall_table[SYS_stat] = "stat";
- #endif
- #if defined (SYS_lseek)
- syscall_table[SYS_lseek] = "lseek";
- #endif
- #if defined (SYS_getpid)
- syscall_table[SYS_getpid] = "getpid";
- #endif
- #if defined (SYS_mount)
- syscall_table[SYS_mount] = "mount";
- #endif
- #if defined (SYS_umount)
- syscall_table[SYS_umount] = "umount";
- #endif
- #if defined (SYS_setuid)
- syscall_table[SYS_setuid] = "setuid";
- #endif
- #if defined (SYS_getuid)
- syscall_table[SYS_getuid] = "getuid";
- #endif
- #if defined (SYS_stime)
- syscall_table[SYS_stime] = "stime";
- #endif
- #if defined (SYS_ptrace)
- syscall_table[SYS_ptrace] = "ptrace";
- #endif
- #if defined (SYS_alarm)
- syscall_table[SYS_alarm] = "alarm";
- #endif
- #if defined (SYS_fstat)
- syscall_table[SYS_fstat] = "fstat";
- #endif
- #if defined (SYS_pause)
- syscall_table[SYS_pause] = "pause";
- #endif
- #if defined (SYS_utime)
- syscall_table[SYS_utime] = "utime";
- #endif
- #if defined (SYS_stty)
- syscall_table[SYS_stty] = "stty";
- #endif
- #if defined (SYS_gtty)
- syscall_table[SYS_gtty] = "gtty";
- #endif
- #if defined (SYS_access)
- syscall_table[SYS_access] = "access";
- #endif
- #if defined (SYS_nice)
- syscall_table[SYS_nice] = "nice";
- #endif
- #if defined (SYS_statfs)
- syscall_table[SYS_statfs] = "statfs";
- #endif
- #if defined (SYS_sync)
- syscall_table[SYS_sync] = "sync";
- #endif
- #if defined (SYS_kill)
- syscall_table[SYS_kill] = "kill";
- #endif
- #if defined (SYS_fstatfs)
- syscall_table[SYS_fstatfs] = "fstatfs";
- #endif
- #if defined (SYS_pgrpsys)
- syscall_table[SYS_pgrpsys] = "pgrpsys";
- #endif
- #if defined (SYS_xenix)
- syscall_table[SYS_xenix] = "xenix";
- #endif
- #if defined (SYS_dup)
- syscall_table[SYS_dup] = "dup";
- #endif
- #if defined (SYS_pipe)
- syscall_table[SYS_pipe] = "pipe";
- #endif
- #if defined (SYS_times)
- syscall_table[SYS_times] = "times";
- #endif
- #if defined (SYS_profil)
- syscall_table[SYS_profil] = "profil";
- #endif
- #if defined (SYS_plock)
- syscall_table[SYS_plock] = "plock";
- #endif
- #if defined (SYS_setgid)
- syscall_table[SYS_setgid] = "setgid";
- #endif
- #if defined (SYS_getgid)
- syscall_table[SYS_getgid] = "getgid";
- #endif
- #if defined (SYS_signal)
- syscall_table[SYS_signal] = "signal";
- #endif
- #if defined (SYS_msgsys)
- syscall_table[SYS_msgsys] = "msgsys";
- #endif
- #if defined (SYS_sys3b)
- syscall_table[SYS_sys3b] = "sys3b";
- #endif
- #if defined (SYS_acct)
- syscall_table[SYS_acct] = "acct";
- #endif
- #if defined (SYS_shmsys)
- syscall_table[SYS_shmsys] = "shmsys";
- #endif
- #if defined (SYS_semsys)
- syscall_table[SYS_semsys] = "semsys";
- #endif
- #if defined (SYS_ioctl)
- syscall_table[SYS_ioctl] = "ioctl";
- #endif
- #if defined (SYS_uadmin)
- syscall_table[SYS_uadmin] = "uadmin";
- #endif
- #if defined (SYS_utssys)
- syscall_table[SYS_utssys] = "utssys";
- #endif
- #if defined (SYS_fsync)
- syscall_table[SYS_fsync] = "fsync";
- #endif
- #if defined (SYS_umask)
- syscall_table[SYS_umask] = "umask";
- #endif
- #if defined (SYS_chroot)
- syscall_table[SYS_chroot] = "chroot";
- #endif
- #if defined (SYS_fcntl)
- syscall_table[SYS_fcntl] = "fcntl";
- #endif
- #if defined (SYS_ulimit)
- syscall_table[SYS_ulimit] = "ulimit";
- #endif
- #if defined (SYS_rfsys)
- syscall_table[SYS_rfsys] = "rfsys";
- #endif
- #if defined (SYS_rmdir)
- syscall_table[SYS_rmdir] = "rmdir";
- #endif
- #if defined (SYS_mkdir)
- syscall_table[SYS_mkdir] = "mkdir";
- #endif
- #if defined (SYS_getdents)
- syscall_table[SYS_getdents] = "getdents";
- #endif
- #if defined (SYS_sysfs)
- syscall_table[SYS_sysfs] = "sysfs";
- #endif
- #if defined (SYS_getmsg)
- syscall_table[SYS_getmsg] = "getmsg";
- #endif
- #if defined (SYS_putmsg)
- syscall_table[SYS_putmsg] = "putmsg";
- #endif
- #if defined (SYS_poll)
- syscall_table[SYS_poll] = "poll";
- #endif
- #if defined (SYS_lstat)
- syscall_table[SYS_lstat] = "lstat";
- #endif
- #if defined (SYS_symlink)
- syscall_table[SYS_symlink] = "symlink";
- #endif
- #if defined (SYS_readlink)
- syscall_table[SYS_readlink] = "readlink";
- #endif
- #if defined (SYS_setgroups)
- syscall_table[SYS_setgroups] = "setgroups";
- #endif
- #if defined (SYS_getgroups)
- syscall_table[SYS_getgroups] = "getgroups";
- #endif
- #if defined (SYS_fchmod)
- syscall_table[SYS_fchmod] = "fchmod";
- #endif
- #if defined (SYS_fchown)
- syscall_table[SYS_fchown] = "fchown";
- #endif
- #if defined (SYS_sigprocmask)
- syscall_table[SYS_sigprocmask] = "sigprocmask";
- #endif
- #if defined (SYS_sigsuspend)
- syscall_table[SYS_sigsuspend] = "sigsuspend";
- #endif
- #if defined (SYS_sigaltstack)
- syscall_table[SYS_sigaltstack] = "sigaltstack";
- #endif
- #if defined (SYS_sigaction)
- syscall_table[SYS_sigaction] = "sigaction";
- #endif
- #if defined (SYS_sigpending)
- syscall_table[SYS_sigpending] = "sigpending";
- #endif
- #if defined (SYS_context)
- syscall_table[SYS_context] = "context";
- #endif
- #if defined (SYS_evsys)
- syscall_table[SYS_evsys] = "evsys";
- #endif
- #if defined (SYS_evtrapret)
- syscall_table[SYS_evtrapret] = "evtrapret";
- #endif
- #if defined (SYS_statvfs)
- syscall_table[SYS_statvfs] = "statvfs";
- #endif
- #if defined (SYS_fstatvfs)
- syscall_table[SYS_fstatvfs] = "fstatvfs";
- #endif
- #if defined (SYS_nfssys)
- syscall_table[SYS_nfssys] = "nfssys";
- #endif
- #if defined (SYS_waitsys)
- syscall_table[SYS_waitsys] = "waitsys";
- #endif
- #if defined (SYS_sigsendsys)
- syscall_table[SYS_sigsendsys] = "sigsendsys";
- #endif
- #if defined (SYS_hrtsys)
- syscall_table[SYS_hrtsys] = "hrtsys";
- #endif
- #if defined (SYS_acancel)
- syscall_table[SYS_acancel] = "acancel";
- #endif
- #if defined (SYS_async)
- syscall_table[SYS_async] = "async";
- #endif
- #if defined (SYS_priocntlsys)
- syscall_table[SYS_priocntlsys] = "priocntlsys";
- #endif
- #if defined (SYS_pathconf)
- syscall_table[SYS_pathconf] = "pathconf";
- #endif
- #if defined (SYS_mincore)
- syscall_table[SYS_mincore] = "mincore";
- #endif
- #if defined (SYS_mmap)
- syscall_table[SYS_mmap] = "mmap";
- #endif
- #if defined (SYS_mprotect)
- syscall_table[SYS_mprotect] = "mprotect";
- #endif
- #if defined (SYS_munmap)
- syscall_table[SYS_munmap] = "munmap";
- #endif
- #if defined (SYS_fpathconf)
- syscall_table[SYS_fpathconf] = "fpathconf";
- #endif
- #if defined (SYS_vfork)
- syscall_table[SYS_vfork] = "vfork";
- #endif
- #if defined (SYS_fchdir)
- syscall_table[SYS_fchdir] = "fchdir";
- #endif
- #if defined (SYS_readv)
- syscall_table[SYS_readv] = "readv";
- #endif
- #if defined (SYS_writev)
- syscall_table[SYS_writev] = "writev";
- #endif
- #if defined (SYS_xstat)
- syscall_table[SYS_xstat] = "xstat";
- #endif
- #if defined (SYS_lxstat)
- syscall_table[SYS_lxstat] = "lxstat";
- #endif
- #if defined (SYS_fxstat)
- syscall_table[SYS_fxstat] = "fxstat";
- #endif
- #if defined (SYS_xmknod)
- syscall_table[SYS_xmknod] = "xmknod";
- #endif
- #if defined (SYS_clocal)
- syscall_table[SYS_clocal] = "clocal";
- #endif
- #if defined (SYS_setrlimit)
- syscall_table[SYS_setrlimit] = "setrlimit";
- #endif
- #if defined (SYS_getrlimit)
- syscall_table[SYS_getrlimit] = "getrlimit";
- #endif
- #if defined (SYS_lchown)
- syscall_table[SYS_lchown] = "lchown";
- #endif
- #if defined (SYS_memcntl)
- syscall_table[SYS_memcntl] = "memcntl";
- #endif
- #if defined (SYS_getpmsg)
- syscall_table[SYS_getpmsg] = "getpmsg";
- #endif
- #if defined (SYS_putpmsg)
- syscall_table[SYS_putpmsg] = "putpmsg";
- #endif
- #if defined (SYS_rename)
- syscall_table[SYS_rename] = "rename";
- #endif
- #if defined (SYS_uname)
- syscall_table[SYS_uname] = "uname";
- #endif
- #if defined (SYS_setegid)
- syscall_table[SYS_setegid] = "setegid";
- #endif
- #if defined (SYS_sysconfig)
- syscall_table[SYS_sysconfig] = "sysconfig";
- #endif
- #if defined (SYS_adjtime)
- syscall_table[SYS_adjtime] = "adjtime";
- #endif
- #if defined (SYS_systeminfo)
- syscall_table[SYS_systeminfo] = "systeminfo";
- #endif
- #if defined (SYS_seteuid)
- syscall_table[SYS_seteuid] = "seteuid";
- #endif
- }
-
- /*
-
- 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)
-
- */
-
- 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).
- */
-
- static void
- do_detach (signal)
- int signal;
- {
- 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
- {
- error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
- pi.prstatus.pr_flags);
- /* NOTREACHED */
- }
-
- if (statloc)
- {
- *statloc = statval;
- }
-
- if (rtnval == -1) /* No more children to wait for */
- {
- fprintf (stderr, "Child process unexpectedly missing.\n");
- *statloc = 42; /* Claim it exited with signal 42 */
- return rtnval;
- }
-
- return (rtnval);
- }
-
- /*
-
- LOCAL FUNCTION
-
- set_proc_siginfo - set a process's current signal info
-
- SYNOPSIS
-
- void set_proc_siginfo (struct procinfo *pip, int signo);
-
- DESCRIPTION
-
- Given a pointer to a process info struct in PIP and a signal number
- in SIGNO, set the process's current signal and its associated signal
- information. The signal will be delivered to the process immediately
- after execution is resumed, even if it is being held. In addition,
- this particular delivery will not cause another PR_SIGNALLED stop
- even if the signal is being traced.
-
- If we are not delivering the same signal that the prstatus siginfo
- struct contains information about, then synthesize a siginfo struct
- to match the signal we are doing to deliver, make it of the type
- "generated by a user process", and send this synthesized copy. When
- used to set the inferior's signal state, this will be required if we
- are not currently stopped because of a traced signal, or if we decide
- to continue with a different signal.
-
- Note that when continuing the inferior from a stop due to receipt
- of a traced signal, we either have set PRCSIG to clear the existing
- signal, or we have to call this function to do a PIOCSSIG with either
- the existing siginfo struct from pr_info, or one we have synthesized
- appropriately for the signal we want to deliver. Otherwise if the
- signal is still being traced, the inferior will immediately stop
- again.
-
- See siginfo(5) for more details.
- */
-
- static void
- set_proc_siginfo (pip, signo)
- struct procinfo *pip;
- int signo;
- {
- struct siginfo newsiginfo;
- struct siginfo *sip;
-
- if (pip -> valid)
- {
- if (signo == pip -> prstatus.pr_info.si_signo)
- {
- sip = &pip -> prstatus.pr_info;
- }
- else
- {
- memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
- sip = &newsiginfo;
- sip -> si_signo = signo;
- sip -> si_code = 0;
- sip -> si_errno = 0;
- sip -> si_pid = getpid ();
- sip -> si_uid = getuid ();
- }
- if (ioctl (pip -> fd, PIOCSSIG, sip) < 0)
- {
- print_sys_errmsg (pip -> pathname, errno);
- warning ("PIOCSSIG failed");
- }
- }
- }
-
- /*
-
- LOCAL FUNCTION
-
- procfs_resume -- resume execution of the inferior process
-
- SYNOPSIS
-
- void procfs_resume (int step, int signo)
-
- DESCRIPTION
-
- Resume execution of the inferior process. If STEP is nozero, then
- just single step it. If SIGNAL is nonzero, restart it with that
- signal activated.
-
- NOTE
-
- 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?)
- */
-
- static void
- procfs_resume (step, signo)
- int step;
- int signo;
- {
- 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))
- {
- set_proc_siginfo (&pi, signo);
- }
- else
- {
- pi.prrun.pr_flags |= PRCSIG;
- }
- pi.nopass_next_sigstop = 0;
- if (step)
- {
- pi.prrun.pr_flags |= PRSTEP;
- }
- if (ioctl (pi.fd, PIOCRUN, &pi.prrun) != 0)
- {
- perror_with_name (pi.pathname);
- /* NOTREACHED */
- }
- }
-
- /*
-
- LOCAL FUNCTION
-
- procfs_fetch_registers -- fetch current registers from inferior
-
- SYNOPSIS
-
- void procfs_fetch_registers (int regno)
-
- DESCRIPTION
-
- Read the current values of the inferior's registers, both the
- general register set and floating point registers (if supported)
- and update gdb's idea of their current values.
-
- */
-
- static void
- procfs_fetch_registers (regno)
- int regno;
- {
- if (ioctl (pi.fd, PIOCGREG, &pi.gregset) != -1)
- {
- supply_gregset (&pi.gregset);
- }
- #if defined (FP0_REGNUM)
- if (ioctl (pi.fd, PIOCGFPREG, &pi.fpregset) != -1)
- {
- supply_fpregset (&pi.fpregset);
- }
- #endif
- }
-
- /*
-
- LOCAL FUNCTION
-
- proc_init_failed - called whenever /proc access initialization fails
-
- SYNOPSIS
-
- static void proc_init_failed (char *why)
-
- DESCRIPTION
-
- This function is called whenever initialization of access to a /proc
- entry fails. It prints a suitable error message, does some cleanup,
- and then invokes the standard error processing routine which dumps
- us back into the command loop.
- */
-
- static void
- proc_init_failed (why)
- char *why;
- {
- print_sys_errmsg (pi.pathname, errno);
- kill (pi.pid, SIGKILL);
- close_proc_file (&pi);
- error (why);
- /* NOTREACHED */
- }
-
- /*
-
- LOCAL FUNCTION
-
- close_proc_file - close any currently open /proc entry
-
- SYNOPSIS
-
- static void close_proc_file (struct procinfo *pip)
-
- DESCRIPTION
-
- Close any currently open /proc entry and mark the process information
- entry as invalid. In order to ensure that we don't try to reuse any
- stale information, the pid, fd, and pathnames are explicitly
- invalidated, which may be overkill.
-
- */
-
- static void
- close_proc_file (pip)
- struct procinfo *pip;
- {
- pip -> pid = 0;
- if (pip -> valid)
- {
- close (pip -> fd);
- }
- pip -> fd = -1;
- if (pip -> pathname)
- {
- free (pip -> pathname);
- pip -> pathname = NULL;
- }
- pip -> valid = 0;
- }
-
- /*
-
- LOCAL FUNCTION
-
- open_proc_file - open a /proc entry for a given process id
-
- SYNOPSIS
-
- static int open_proc_file (int pid, struct procinfo *pip, int mode)
-
- DESCRIPTION
-
- Given a process id and a mode, close the existing open /proc
- entry (if any) and open one for the new process id, in the
- specified mode. Once it is open, then mark the local process
- information structure as valid, which guarantees that the pid,
- fd, and pathname fields match an open /proc entry. Returns
- zero if the open fails, nonzero otherwise.
-
- Note that the pathname is left intact, even when the open fails,
- so that callers can use it to construct meaningful error messages
- rather than just "file open failed".
- */
-
- static int
- open_proc_file (pid, pip, mode)
- int pid;
- struct procinfo *pip;
- int mode;
- {
- pip -> valid = 0; /* FIXME, what is this? ?! */
- if (pip -> valid)
- {
- close (pip -> fd);
- }
- if (pip -> pathname == NULL)
- {
- pip -> pathname = xmalloc (32);
- }
- sprintf (pip -> pathname, PROC_NAME_FMT, pid);
- if ((pip -> fd = open (pip -> pathname, mode)) >= 0)
- {
- pip -> valid = 1;
- pip -> pid = pid;
- }
- return (pip -> valid);
- }
-
- static char *
- mappingflags (flags)
- long flags;
- {
- static char asciiflags[8];
-
- strcpy (asciiflags, "-------");
- #if defined (MA_PHYS)
- if (flags & MA_PHYS) asciiflags[0] = 'd';
- #endif
- if (flags & MA_STACK) asciiflags[1] = 's';
- if (flags & MA_BREAK) asciiflags[2] = 'b';
- if (flags & MA_SHARED) asciiflags[3] = 's';
- if (flags & MA_READ) asciiflags[4] = 'r';
- if (flags & MA_WRITE) asciiflags[5] = 'w';
- if (flags & MA_EXEC) asciiflags[6] = 'x';
- return (asciiflags);
- }
-
- static void
- info_proc_flags (pip, summary)
- struct procinfo *pip;
- int summary;
- {
- struct trans *transp;
-
- printf_filtered ("%-32s", "Process status flags:");
- if (!summary)
- {
- printf_filtered ("\n\n");
- }
- for (transp = pr_flag_table; transp -> name != NULL; transp++)
- {
- if (pip -> prstatus.pr_flags & transp -> value)
- {
- if (summary)
- {
- printf_filtered ("%s ", transp -> name);
- }
- else
- {
- printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc);
- }
- }
- }
- printf_filtered ("\n");
- }
-
- static void
- info_proc_stop (pip, summary)
- struct procinfo *pip;
- int summary;
- {
- struct trans *transp;
- int why;
- int what;
-
- why = pip -> prstatus.pr_why;
- what = pip -> prstatus.pr_what;
-
- if (pip -> prstatus.pr_flags & PR_STOPPED)
- {
- printf_filtered ("%-32s", "Reason for stopping:");
- if (!summary)
- {
- printf_filtered ("\n\n");
- }
- for (transp = pr_why_table; transp -> name != NULL; transp++)
- {
- if (why == transp -> value)
- {
- if (summary)
- {
- printf_filtered ("%s ", transp -> name);
- }
- else
- {
- printf_filtered ("\t%-16s %s.\n",
- transp -> name, transp -> desc);
- }
- break;
- }
- }
-
- /* Use the pr_why field to determine what the pr_what field means, and
- print more information. */
-
- switch (why)
- {
- case PR_REQUESTED:
- /* pr_what is unused for this case */
- break;
- case PR_JOBCONTROL:
- case PR_SIGNALLED:
- if (summary)
- {
- printf_filtered ("%s ", signalname (what));
- }
- else
- {
- printf_filtered ("\t%-16s %s.\n", signalname (what),
- safe_strsignal (what));
- }
- break;
- case PR_SYSENTRY:
- if (summary)
- {
- printf_filtered ("%s ", syscallname (what));
- }
- else
- {
- printf_filtered ("\t%-16s %s.\n", syscallname (what),
- "Entered this system call");
- }
- break;
- case PR_SYSEXIT:
- if (summary)
- {
- printf_filtered ("%s ", syscallname (what));
- }
- else
- {
- printf_filtered ("\t%-16s %s.\n", syscallname (what),
- "Returned from this system call");
- }
- break;
- case PR_FAULTED:
- if (summary)
- {
- printf_filtered ("%s ",
- lookupname (faults_table, what, "fault"));
- }
- else
- {
- printf_filtered ("\t%-16s %s.\n",
- lookupname (faults_table, what, "fault"),
- lookupdesc (faults_table, what));
- }
- break;
- }
- printf_filtered ("\n");
- }
- }
-
- static void
- info_proc_siginfo (pip, summary)
- struct procinfo *pip;
- int summary;
- {
- struct siginfo *sip;
-
- if ((pip -> prstatus.pr_flags & PR_STOPPED) &&
- (pip -> prstatus.pr_why == PR_SIGNALLED ||
- pip -> prstatus.pr_why == PR_FAULTED))
- {
- printf_filtered ("%-32s", "Additional signal/fault info:");
- sip = &pip -> prstatus.pr_info;
- if (summary)
- {
- printf_filtered ("%s ", signalname (sip -> si_signo));
- if (sip -> si_errno > 0)
- {
- printf_filtered ("%s ", errnoname (sip -> si_errno));
- }
- if (sip -> si_code <= 0)
- {
- printf_filtered ("sent by 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
- {
- 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");
- }
- }
-
- static void
- info_proc_syscalls (pip, summary)
- struct procinfo *pip;
- int summary;
- {
- int syscallnum;
-
- if (!summary)
- {
-
- #if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
- if (pip -> prstatus.pr_flags & PR_ASLEEP)
- {
- int syscallnum = pip -> prstatus.pr_reg[R_D0];
- if (summary)
- {
- printf_filtered ("%-32s", "Sleeping in system call:");
- printf_filtered ("%s", syscallname (syscallnum));
- }
- else
- {
- printf_filtered ("Sleeping in system call '%s'.\n",
- syscallname (syscallnum));
- }
- }
- #endif
-
- if (ioctl (pip -> fd, PIOCGENTRY, &pip -> entryset) < 0)
- {
- print_sys_errmsg (pip -> pathname, errno);
- error ("PIOCGENTRY failed");
- }
-
- if (ioctl (pip -> fd, PIOCGEXIT, &pip -> exitset) < 0)
- {
- print_sys_errmsg (pip -> pathname, errno);
- error ("PIOCGEXIT failed");
- }
-
- printf_filtered ("System call tracing information:\n\n");
-
- printf_filtered ("\t%-12s %-8s %-8s\n",
- "System call",
- "Entry",
- "Exit");
- for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++)
- {
- QUIT;
- if (syscall_table[syscallnum] != NULL)
- {
- printf_filtered ("\t%-12s ", syscall_table[syscallnum]);
- printf_filtered ("%-8s ",
- prismember (&pip -> entryset, syscallnum)
- ? "on" : "off");
- printf_filtered ("%-8s ",
- prismember (&pip -> exitset, syscallnum)
- ? "on" : "off");
- printf_filtered ("\n");
- }
- }
- printf_filtered ("\n");
- }
- }
-
- static char *
- signalname (signo)
- int signo;
- {
- char *name;
- static char locbuf[32];
-
- name = strsigno (signo);
- if (name == NULL)
- {
- sprintf (locbuf, "Signal %d", signo);
- }
- else
- {
- sprintf (locbuf, "%s (%d)", name, signo);
- }
- return (locbuf);
- }
-
- static char *
- errnoname (errnum)
- int errnum;
- {
- char *name;
- static char locbuf[32];
-
- name = strerrno (errnum);
- if (name == NULL)
- {
- sprintf (locbuf, "Errno %d", errnum);
- }
- else
- {
- sprintf (locbuf, "%s (%d)", name, errnum);
- }
- return (locbuf);
- }
-
- static void
- info_proc_signals (pip, summary)
- struct procinfo *pip;
- int summary;
- {
- int signo;
-
- if (!summary)
- {
- if (ioctl (pip -> fd, PIOCGTRACE, &pip -> trace) < 0)
- {
- print_sys_errmsg (pip -> pathname, errno);
- error ("PIOCGTRACE failed");
- }
-
- printf_filtered ("Disposition of signals:\n\n");
- printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
- "Signal", "Trace", "Hold", "Pending", "Description");
- for (signo = 0; signo < NSIG; signo++)
- {
- QUIT;
- printf_filtered ("\t%-15s ", signalname (signo));
- printf_filtered ("%-8s ",
- prismember (&pip -> trace, signo)
- ? "on" : "off");
- printf_filtered ("%-8s ",
- prismember (&pip -> prstatus.pr_sighold, signo)
- ? "on" : "off");
- printf_filtered ("%-8s ",
- prismember (&pip -> prstatus.pr_sigpend, signo)
- ? "yes" : "no");
- printf_filtered (" %s\n", safe_strsignal (signo));
- }
- printf_filtered ("\n");
- }
- }
-
- static void
- info_proc_faults (pip, summary)
- struct procinfo *pip;
- int summary;
- {
- struct trans *transp;
-
- if (!summary)
- {
- if (ioctl (pip -> fd, PIOCGFAULT, &pip -> fltset) < 0)
- {
- print_sys_errmsg (pip -> pathname, errno);
- error ("PIOCGFAULT failed");
- }
-
- printf_filtered ("Current traced hardware fault set:\n\n");
- printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
-
- for (transp = faults_table; transp -> name != NULL; transp++)
- {
- QUIT;
- printf_filtered ("\t%-12s ", transp -> name);
- printf_filtered ("%-8s", prismember (&pip -> fltset, transp -> value)
- ? "on" : "off");
- printf_filtered ("\n");
- }
- printf_filtered ("\n");
- }
- }
-
- static void
- 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
-
- info_proc -- implement the "info proc" command
-
- SYNOPSIS
-
- void info_proc (char *args, int from_tty)
-
- DESCRIPTION
-
- 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
- info_proc (args, from_tty)
- char *args;
- int from_tty;
- {
- 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++;
- }
- }
-
- /* If we don't have a valid open process at this point, then we have no
- inferior or didn't specify a specific pid. */
-
- if (!pip -> valid)
- {
- 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");
- }
-
- /* Print verbose information of the requested type(s), or just a summary
- of the information for all types. */
-
- printf_filtered ("\nInformation for %s:\n\n", pip -> pathname);
- if (summary || all || flags)
- {
- info_proc_flags (pip, summary);
- }
- if (summary || all)
- {
- info_proc_stop (pip, summary);
- }
- if (summary || all || signals || faults)
- {
- info_proc_siginfo (pip, summary);
- }
- if (summary || all || syscalls)
- {
- info_proc_syscalls (pip, summary);
- }
- if (summary || all || mappings)
- {
- info_proc_mappings (pip, summary);
- }
- if (summary || all || signals)
- {
- info_proc_signals (pip, summary);
- }
- if (summary || all || faults)
- {
- info_proc_faults (pip, summary);
- }
- printf_filtered ("\n");
-
- /* All done, deal with closing any temporary process info structure,
- freeing temporary memory , etc. */
-
- do_cleanups (old_chain);
- }
-
- /* Fork an inferior process, and start debugging it with /proc. */
-
- static void
- procfs_create_inferior (exec_file, allargs, env)
- char *exec_file;
- char *allargs;
- char **env;
- {
- fork_inferior (exec_file, allargs, env,
- proc_set_exec_trap, procfs_init_inferior);
- /* We are at the first instruction we care about. */
- /* Pedal to the metal... */
- proceed ((CORE_ADDR) -1, 0, 0);
- }
-
- /* Clean up after the inferior dies. */
-
- static void
- procfs_mourn_inferior ()
- {
- unpush_target (&procfs_ops);
- generic_mourn_inferior ();
- }
-
- /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
- static int
- procfs_can_run ()
- {
- return(1);
- }
-
- struct target_ops procfs_ops = {
- "procfs", /* to_shortname */
- "Unix /proc child process", /* to_longname */
- "Unix /proc child process (started by the \"run\" command).", /* to_doc */
- procfs_open, /* to_open */
- 0, /* to_close */
- procfs_attach, /* to_attach */
- procfs_detach, /* to_detach */
- procfs_resume, /* to_resume */
- procfs_wait, /* to_wait */
- procfs_fetch_registers, /* to_fetch_registers */
- procfs_store_registers, /* to_store_registers */
- procfs_prepare_to_store, /* to_prepare_to_store */
- procfs_xfer_memory, /* to_xfer_memory */
- procfs_files_info, /* to_files_info */
- memory_insert_breakpoint, /* to_insert_breakpoint */
- memory_remove_breakpoint, /* to_remove_breakpoint */
- terminal_init_inferior, /* to_terminal_init */
- terminal_inferior, /* to_terminal_inferior */
- terminal_ours_for_output, /* to_terminal_ours_for_output */
- terminal_ours, /* to_terminal_ours */
- child_terminal_info, /* to_terminal_info */
- procfs_kill_inferior, /* to_kill */
- 0, /* to_load */
- 0, /* to_lookup_symbol */
- procfs_create_inferior, /* to_create_inferior */
- procfs_mourn_inferior, /* to_mourn_inferior */
- procfs_can_run, /* to_can_run */
- procfs_notice_signals, /* to_notice_signals */
- process_stratum, /* to_stratum */
- 0, /* to_next */
- 1, /* to_has_all_memory */
- 1, /* to_has_memory */
- 1, /* to_has_stack */
- 1, /* to_has_registers */
- 1, /* to_has_execution */
- 0, /* sections */
- 0, /* sections_end */
- OPS_MAGIC /* to_magic */
- };
-
- /*
-
- GLOBAL FUNCTION
-
- _initialize_procfs -- initialize the process file system stuff
-
- SYNOPSIS
-
- void _initialize_procfs (void)
-
- DESCRIPTION
-
- Do required initializations during gdb startup for using the
- /proc file system interface.
-
- */
-
- void
- _initialize_procfs ()
- {
- add_target (&procfs_ops);
-
- add_info ("proc", info_proc,
- "Show process status information using /proc entry.\n\
- Specify process id or use current inferior by default.\n\
- Specify keywords for detailed information; default is summary.\n\
- Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
- `status', `syscalls', and `times'.\n\
- Unambiguous abbreviations may be used.");
-
- init_syscall_table ();
- }
-