/* Machine independent support for SVR4 /proc (process file system) for GDB.
- Copyright 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
- Written by Fred Fish at Cygnus Support.
+ Copyright 1991, 1992-97, 1998 Free Software Foundation, Inc.
+ Written by Fred Fish at Cygnus Support. Changes for sysv4.2mp procfs
+ compatibility by Geoffrey Noer at Cygnus Solutions.
This file is part of GDB.
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. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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
+The general register and floating point register sets are manipulated
+separately. 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 <sys/types.h>
#include <time.h>
+#include <sys/fault.h>
+#include <sys/syscall.h>
#include <sys/procfs.h>
#include <fcntl.h>
#include <errno.h>
-#include <string.h>
+#include "gdb_string.h"
#include <stropts.h>
#include <poll.h>
#include <unistd.h>
-#include <sys/stat.h>
+#include "gdb_stat.h"
#include "inferior.h"
#include "target.h"
#include "command.h"
#include "gdbcore.h"
+#include "gdbthread.h"
+
+#if !defined(SYS_lwp_create) && defined(SYS_lwpcreate)
+# define SYS_lwp_create SYS_lwpcreate
+#endif
+
+#if !defined(SYS_lwp_exit) && defined(SYS_lwpexit)
+# define SYS_lwp_exit SYS_lwpexit
+#endif
+
+#if !defined(SYS_lwp_wait) && defined(SYS_lwpwait)
+# define SYS_lwp_wait SYS_lwpwait
+#endif
+
+#if !defined(SYS_lwp_self) && defined(SYS_lwpself)
+# define SYS_lwp_self SYS_lwpself
+#endif
+
+#if !defined(SYS_lwp_info) && defined(SYS_lwpinfo)
+# define SYS_lwp_info SYS_lwpinfo
+#endif
+
+#if !defined(SYS_lwp_private) && defined(SYS_lwpprivate)
+# define SYS_lwp_private SYS_lwpprivate
+#endif
+
+#if !defined(SYS_lwp_kill) && defined(SYS_lwpkill)
+# define SYS_lwp_kill SYS_lwpkill
+#endif
+
+#if !defined(SYS_lwp_suspend) && defined(SYS_lwpsuspend)
+# define SYS_lwp_suspend SYS_lwpsuspend
+#endif
+
+#if !defined(SYS_lwp_continue) && defined(SYS_lwpcontinue)
+# define SYS_lwp_continue SYS_lwpcontinue
+#endif
+
+/* the name of the proc status struct depends on the implementation */
+#ifdef HAVE_PSTATUS_T
+ typedef pstatus_t gdb_prstatus_t;
+#else
+ typedef prstatus_t gdb_prstatus_t;
+#endif
#define MAX_SYSCALLS 256 /* Maximum number of syscalls for table */
-#ifndef PROC_NAME_FMT
-#define PROC_NAME_FMT "/proc/%05d"
+/* proc name formats may vary depending on the proc implementation */
+#ifdef HAVE_MULTIPLE_PROC_FDS
+# ifndef CTL_PROC_NAME_FMT
+# define CTL_PROC_NAME_FMT "/proc/%d/ctl"
+# define AS_PROC_NAME_FMT "/proc/%d/as"
+# define MAP_PROC_NAME_FMT "/proc/%d/map"
+# define STATUS_PROC_NAME_FMT "/proc/%d/status"
+# endif
+#else /* HAVE_MULTIPLE_PROC_FDS */
+# ifndef CTL_PROC_NAME_FMT
+# define CTL_PROC_NAME_FMT "/proc/%05d"
+# define AS_PROC_NAME_FMT "/proc/%05d"
+# define MAP_PROC_NAME_FMT "/proc/%05d"
+# define STATUS_PROC_NAME_FMT "/proc/%05d"
+# endif
+#endif /* HAVE_MULTIPLE_PROC_FDS */
+
+
+/* These #ifdefs are for sol2.x in particular. sol2.x has
+ both a "gregset_t" and a "prgregset_t", which have
+ similar uses but different layouts. sol2.x gdb tries to
+ use prgregset_t (and prfpregset_t) everywhere. */
+
+#ifdef GDB_GREGSET_TYPE
+ typedef GDB_GREGSET_TYPE gdb_gregset_t;
+#else
+ typedef gregset_t gdb_gregset_t;
+#endif
+
+#ifdef GDB_FPREGSET_TYPE
+ typedef GDB_FPREGSET_TYPE gdb_fpregset_t;
+#else
+ typedef fpregset_t gdb_fpregset_t;
#endif
+
+#define MAX_PROC_NAME_SIZE sizeof("/proc/1234567890/status")
+
extern struct target_ops procfs_ops; /* Forward declaration */
+int procfs_suppress_run = 0; /* Non-zero if procfs should pretend not to
+ be a runnable target. Used by targets
+ that can sit atop procfs, such as solaris
+ thread support. */
+
#if 1 /* FIXME: Gross and ugly hack to resolve coredep.c global */
CORE_ADDR kernel_u_addr;
#endif
#define si_uid _data._proc._pdata._kill.uid
#endif /* BROKEN_SIGINFO_H */
+/* Define structures for passing commands to /proc/pid/ctl file. Note that
+ while we create these for the PROCFS_USE_READ_WRITE world, we use them
+ and ignore the extra cmd int in other proc schemes.
+*/
+/* generic ctl msg */
+struct proc_ctl {
+ int cmd;
+ long data;
+};
+
+/* set general registers */
+struct greg_ctl {
+ int cmd;
+ gdb_gregset_t gregset;
+};
+
+/* set fp registers */
+struct fpreg_ctl {
+ int cmd;
+ gdb_fpregset_t fpregset;
+};
+
+/* set signals to be traced */
+struct sig_ctl {
+ int cmd;
+ sigset_t sigset;
+};
+
+/* set faults to be traced */
+struct flt_ctl {
+ int cmd;
+ fltset_t fltset;
+};
+
+/* set system calls to be traced */
+struct sys_ctl {
+ int cmd;
+ sysset_t sysset;
+};
+
+/* set current signal to be traced */
+struct sigi_ctl {
+ int cmd;
+ siginfo_t siginfo;
+};
+
/* 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,
struct procinfo {
struct procinfo *next;
int pid; /* Process ID of inferior */
- int fd; /* File descriptor for /proc entry */
+ int ctl_fd; /* File descriptor for /proc ctl file */
+ int status_fd; /* File descriptor for /proc status file */
+ int as_fd; /* File descriptor for /proc as file */
+ int map_fd; /* File descriptor for /proc map file */
char *pathname; /* Pathname to /proc entry */
int had_event; /* poll/select says something happened */
int was_stopped; /* Nonzero if was stopped prior to attach */
int nopass_next_sigstop; /* Don't pass a sigstop on next resume */
+#ifndef HAVE_NO_PRRUN_T
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 */
+#endif
+ gdb_prstatus_t prstatus; /* Current process status info */
+ struct greg_ctl gregset; /* General register set */
+ struct fpreg_ctl fpregset; /* Floating point register set */
+ struct flt_ctl fltset; /* Current traced hardware fault set */
+ struct sig_ctl trace; /* Current traced signal set */
+ struct sys_ctl exitset; /* Current traced system call exit set */
+ struct sys_ctl entryset; /* Current traced system call entry set */
+ struct sig_ctl saved_sighold; /* Saved held signal set */
+ struct flt_ctl saved_fltset; /* Saved traced hardware fault set */
+ struct sig_ctl saved_trace; /* Saved traced signal set */
+ struct sys_ctl saved_exitset; /* Saved traced system call exit set */
+ struct sys_ctl saved_entryset;/* Saved traced system call entry set */
+ int num_syscall_handlers; /* Number of syscall trap handlers
+ currently installed */
+ /* Pointer to list of syscall trap handlers */
+ struct procfs_syscall_handler *syscall_handlers;
+ int saved_rtnval; /* return value and status for wait(), */
+ int saved_statval; /* as supplied by a syscall handler. */
+ int new_child; /* Non-zero if it's a new thread */
};
/* List of inferior process information */
static struct procinfo *procinfo_list = NULL;
-
static struct pollfd *poll_list; /* pollfds used for waiting on /proc */
static int num_poll_list = 0; /* Number of entries in poll_list */
-static int last_resume_pid = -1; /* Last pid used with procfs_resume */
-
/* Much of the information used in the /proc interface, particularly for
printing status information, is kept as tables of structures of the
following form. These tables can be used to map numeric values to
static struct trans pr_flag_table[] =
{
#if defined (PR_STOPPED)
- PR_STOPPED, "PR_STOPPED", "Process is stopped",
+ { PR_STOPPED, "PR_STOPPED", "Process is stopped" },
#endif
#if defined (PR_ISTOP)
- PR_ISTOP, "PR_ISTOP", "Stopped on an event of interest",
+ { 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",
+ { 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",
+ { 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",
+ { 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",
+ { 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",
+ { 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",
+ { PR_PCINVAL, "PR_PCINVAL", "PC refers to an invalid virtual address" },
#endif
#if defined (PR_ISSYS)
- PR_ISSYS, "PR_ISSYS", "Is a system process",
+ { PR_ISSYS, "PR_ISSYS", "Is a system process" },
#endif
#if defined (PR_STEP)
- PR_STEP, "PR_STEP", "Process has single step pending",
+ { 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",
+ { 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",
+ { PR_ASYNC, "PR_ASYNC", "Asynchronous stop is in effect" },
#endif
#if defined (PR_PCOMPAT)
- PR_PCOMPAT, "PR_PCOMPAT", "Ptrace compatibility mode in effect",
+ { PR_PCOMPAT, "PR_PCOMPAT", "Ptrace compatibility mode in effect" },
+#endif
+#if defined (PR_MSACCT)
+ { PR_MSACCT, "PR_MSACCT", "Microstate accounting enabled" },
+#endif
+#if defined (PR_BPTADJ)
+ { PR_BPTADJ, "PR_BPTADJ", "Breakpoint PC adjustment in effect" },
#endif
- 0, NULL, NULL
+#if defined (PR_ASLWP)
+ { PR_ASLWP, "PR_ASLWP", "Asynchronus signal LWP" },
+#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",
+ { 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",
+ { PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal" },
#endif
#if defined (PR_SYSENTRY)
- PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call",
+ { 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",
+ { 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",
+ { PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action" },
+#endif
+#if defined (PR_FAULTED)
+ { PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault" },
#endif
#if defined (PR_SUSPENDED)
- PR_SUSPENDED, "PR_SUSPENDED", "Process suspended",
+ { PR_SUSPENDED, "PR_SUSPENDED", "Process suspended" },
+#endif
+#if defined (PR_CHECKPOINT)
+ { PR_CHECKPOINT, "PR_CHECKPOINT", "(???)" },
#endif
- 0, NULL, NULL
+ { 0, NULL, NULL }
};
/* Hardware fault translation table. */
static struct trans faults_table[] =
{
#if defined (FLTILL)
- FLTILL, "FLTILL", "Illegal instruction",
+ { FLTILL, "FLTILL", "Illegal instruction" },
#endif
#if defined (FLTPRIV)
- FLTPRIV, "FLTPRIV", "Privileged instruction",
+ { FLTPRIV, "FLTPRIV", "Privileged instruction" },
#endif
#if defined (FLTBPT)
- FLTBPT, "FLTBPT", "Breakpoint trap",
+ { FLTBPT, "FLTBPT", "Breakpoint trap" },
#endif
#if defined (FLTTRACE)
- FLTTRACE, "FLTTRACE", "Trace trap",
+ { FLTTRACE, "FLTTRACE", "Trace trap" },
#endif
#if defined (FLTACCESS)
- FLTACCESS, "FLTACCESS", "Memory access fault",
+ { FLTACCESS, "FLTACCESS", "Memory access fault" },
#endif
#if defined (FLTBOUNDS)
- FLTBOUNDS, "FLTBOUNDS", "Memory bounds violation",
+ { FLTBOUNDS, "FLTBOUNDS", "Memory bounds violation" },
#endif
#if defined (FLTIOVF)
- FLTIOVF, "FLTIOVF", "Integer overflow",
+ { FLTIOVF, "FLTIOVF", "Integer overflow" },
#endif
#if defined (FLTIZDIV)
- FLTIZDIV, "FLTIZDIV", "Integer zero divide",
+ { FLTIZDIV, "FLTIZDIV", "Integer zero divide" },
#endif
#if defined (FLTFPE)
- FLTFPE, "FLTFPE", "Floating-point exception",
+ { FLTFPE, "FLTFPE", "Floating-point exception" },
#endif
#if defined (FLTSTACK)
- FLTSTACK, "FLTSTACK", "Unrecoverable stack fault",
+ { FLTSTACK, "FLTSTACK", "Unrecoverable stack fault" },
#endif
#if defined (FLTPAGE)
- FLTPAGE, "FLTPAGE", "Recoverable page fault",
+ { FLTPAGE, "FLTPAGE", "Recoverable page fault" },
#endif
- 0, NULL, NULL
+ { 0, NULL, NULL }
};
/* Translation table for signal generation information. See UNIX System
char *desc;
} siginfo_table[] = {
#if defined (SIGILL) && defined (ILL_ILLOPC)
- SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode",
+ { SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode" },
#endif
#if defined (SIGILL) && defined (ILL_ILLOPN)
- SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand",
+ { SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand", },
#endif
#if defined (SIGILL) && defined (ILL_ILLADR)
- SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode",
+ { SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode" },
#endif
#if defined (SIGILL) && defined (ILL_ILLTRP)
- SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap",
+ { SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap" },
#endif
#if defined (SIGILL) && defined (ILL_PRVOPC)
- SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode",
+ { SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode" },
#endif
#if defined (SIGILL) && defined (ILL_PRVREG)
- SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register",
+ { SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register" },
#endif
#if defined (SIGILL) && defined (ILL_COPROC)
- SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error",
+ { SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error" },
#endif
#if defined (SIGILL) && defined (ILL_BADSTK)
- SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error",
+ { SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error" },
#endif
#if defined (SIGFPE) && defined (FPE_INTDIV)
- SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero",
+ { SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero" },
#endif
#if defined (SIGFPE) && defined (FPE_INTOVF)
- SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow",
+ { SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow" },
#endif
#if defined (SIGFPE) && defined (FPE_FLTDIV)
- SIGFPE, FPE_FLTDIV, "FPE_FLTDIV", "Floating point divide by zero",
+ { 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",
+ { SIGFPE, FPE_FLTOVF, "FPE_FLTOVF", "Floating point overflow" },
#endif
#if defined (SIGFPE) && defined (FPE_FLTUND)
- SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating point underflow",
+ { SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating point underflow" },
#endif
#if defined (SIGFPE) && defined (FPE_FLTRES)
- SIGFPE, FPE_FLTRES, "FPE_FLTRES", "Floating point inexact result",
+ { 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",
+ { 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",
+ { 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",
+ { 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",
+ { SIGSEGV, SEGV_ACCERR, "SEGV_ACCERR", "Invalid permissions for object" },
#endif
#if defined (SIGBUS) && defined (BUS_ADRALN)
- SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment",
+ { SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment" },
#endif
#if defined (SIGBUS) && defined (BUS_ADRERR)
- SIGBUS, BUS_ADRERR, "BUS_ADRERR", "Non-existent physical address",
+ { 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",
+ { SIGBUS, BUS_OBJERR, "BUS_OBJERR", "Object specific hardware error" },
#endif
#if defined (SIGTRAP) && defined (TRAP_BRKPT)
- SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint",
+ { SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint" },
#endif
#if defined (SIGTRAP) && defined (TRAP_TRACE)
- SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap",
+ { SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap" },
#endif
#if defined (SIGCLD) && defined (CLD_EXITED)
- SIGCLD, CLD_EXITED, "CLD_EXITED", "Child has exited",
+ { SIGCLD, CLD_EXITED, "CLD_EXITED", "Child has exited" },
#endif
#if defined (SIGCLD) && defined (CLD_KILLED)
- SIGCLD, CLD_KILLED, "CLD_KILLED", "Child was 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",
+ { 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",
+ { SIGCLD, CLD_TRAPPED, "CLD_TRAPPED", "Traced child has trapped" },
#endif
#if defined (SIGCLD) && defined (CLD_STOPPED)
- SIGCLD, CLD_STOPPED, "CLD_STOPPED", "Child has 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",
+ { SIGCLD, CLD_CONTINUED, "CLD_CONTINUED", "Stopped child had continued" },
#endif
#if defined (SIGPOLL) && defined (POLL_IN)
- SIGPOLL, POLL_IN, "POLL_IN", "Input input available",
+ { SIGPOLL, POLL_IN, "POLL_IN", "Input input available" },
#endif
#if defined (SIGPOLL) && defined (POLL_OUT)
- SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available",
+ { SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available" },
#endif
#if defined (SIGPOLL) && defined (POLL_MSG)
- SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available",
+ { SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available" },
#endif
#if defined (SIGPOLL) && defined (POLL_ERR)
- SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error",
+ { SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error" },
#endif
#if defined (SIGPOLL) && defined (POLL_PRI)
- SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available",
+ { SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available" },
#endif
#if defined (SIGPOLL) && defined (POLL_HUP)
- SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected",
+ { SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected" },
#endif
- 0, 0, NULL, NULL
+ { 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 procfs_stop PARAMS ((void));
-static void
-init_syscall_table PARAMS ((void));
+static int procfs_thread_alive PARAMS ((int));
-static char *
-syscallname PARAMS ((int));
+static int procfs_can_run PARAMS ((void));
-static char *
-signalname PARAMS ((int));
+static void procfs_mourn_inferior PARAMS ((void));
-static char *
-errnoname PARAMS ((int));
+static void procfs_fetch_registers PARAMS ((int));
-static int
-proc_address_to_fd PARAMS ((struct procinfo *, CORE_ADDR, int));
+static int procfs_wait PARAMS ((int, struct target_waitstatus *));
-static int
-open_proc_file PARAMS ((int, struct procinfo *, int));
+static void procfs_open PARAMS ((char *, int));
-static void
-close_proc_file PARAMS ((struct procinfo *));
+static void procfs_files_info PARAMS ((struct target_ops *));
-static void
-unconditionally_kill_inferior PARAMS ((struct procinfo *));
+static void procfs_prepare_to_store PARAMS ((void));
-static NORETURN void
-proc_init_failed PARAMS ((struct procinfo *, char *)) ATTR_NORETURN;
+static void procfs_detach PARAMS ((char *, int));
-static void
-info_proc PARAMS ((char *, int));
+static void procfs_attach PARAMS ((char *, int));
-static void
-info_proc_flags PARAMS ((struct procinfo *, int));
+static void proc_set_exec_trap PARAMS ((void));
-static void
-info_proc_stop PARAMS ((struct procinfo *, int));
+static void procfs_init_inferior PARAMS ((int));
-static void
-info_proc_siginfo PARAMS ((struct procinfo *, int));
+static struct procinfo *create_procinfo PARAMS ((int));
-static void
-info_proc_syscalls PARAMS ((struct procinfo *, int));
+static void procfs_store_registers PARAMS ((int));
-static void
-info_proc_mappings PARAMS ((struct procinfo *, int));
+static int procfs_xfer_memory PARAMS ((CORE_ADDR, char *, int, int, struct target_ops *));
-static void
-info_proc_signals PARAMS ((struct procinfo *, int));
+static void procfs_kill_inferior PARAMS ((void));
-static void
-info_proc_faults PARAMS ((struct procinfo *, int));
+static char *sigcodedesc PARAMS ((siginfo_t *));
-static char *
-mappingflags PARAMS ((long));
+static char *sigcodename PARAMS ((siginfo_t *));
-static char *
-lookupname PARAMS ((struct trans *, unsigned int, char *));
+static struct procinfo *wait_fd PARAMS ((void));
-static char *
-lookupdesc PARAMS ((struct trans *, unsigned int));
+static void remove_fd PARAMS ((struct procinfo *));
-static int
-do_attach PARAMS ((int pid));
+static void add_fd PARAMS ((struct procinfo *));
-static void
-do_detach PARAMS ((int siggnal));
+static void set_proc_siginfo PARAMS ((struct procinfo *, int));
-static void
-procfs_create_inferior PARAMS ((char *, char *, char **));
+static void init_syscall_table PARAMS ((void));
-static void
-procfs_notice_signals PARAMS ((int pid));
+static char *syscallname PARAMS ((int));
-static struct procinfo *
-find_procinfo PARAMS ((pid_t pid, int okfail));
+static char *signalname PARAMS ((int));
+
+static char *errnoname PARAMS ((int));
+
+static int proc_address_to_fd PARAMS ((struct procinfo *, CORE_ADDR, int));
+
+static int open_proc_file PARAMS ((int, struct procinfo *, int, int));
+
+static void close_proc_file PARAMS ((struct procinfo *));
+
+static void unconditionally_kill_inferior PARAMS ((struct procinfo *));
+
+static NORETURN void proc_init_failed PARAMS ((struct procinfo *, char *, int)) ATTR_NORETURN;
+
+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 ((int pid));
+
+static void notice_signals PARAMS ((struct procinfo *, struct sig_ctl *));
+
+static struct procinfo *find_procinfo PARAMS ((pid_t pid, int okfail));
+
+static int procfs_write_pcwstop PARAMS ((struct procinfo *));
+static int procfs_read_status PARAMS ((struct procinfo *));
+static void procfs_write_pckill PARAMS ((struct procinfo *));
+
+typedef int syscall_func_t PARAMS ((struct procinfo *pi, int syscall_num,
+ int why, int *rtnval, int *statval));
+
+static void procfs_set_syscall_trap PARAMS ((struct procinfo *pi,
+ int syscall_num, int flags,
+ syscall_func_t *func));
+
+static void procfs_clear_syscall_trap PARAMS ((struct procinfo *pi,
+ int syscall_num, int errok));
+
+#define PROCFS_SYSCALL_ENTRY 0x1 /* Trap on entry to sys call */
+#define PROCFS_SYSCALL_EXIT 0x2 /* Trap on exit from sys call */
+
+static syscall_func_t procfs_exit_handler;
+
+static syscall_func_t procfs_exec_handler;
+
+#ifdef SYS_sproc
+static syscall_func_t procfs_sproc_handler;
+static syscall_func_t procfs_fork_handler;
+#endif
+
+#ifdef SYS_lwp_create
+static syscall_func_t procfs_lwp_creation_handler;
+#endif
+
+static void modify_inherit_on_fork_flag PARAMS ((int fd, int flag));
+static void modify_run_on_last_close_flag PARAMS ((int fd, int flag));
+
+/* */
+
+struct procfs_syscall_handler
+{
+ int syscall_num; /* The number of the system call being handled */
+ /* The function to be called */
+ syscall_func_t *func;
+};
+
+static void procfs_resume PARAMS ((int pid, int step,
+ enum target_signal signo));
/* 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 supply_gregset PARAMS ((gdb_gregset_t *));
-extern void
-fill_gregset PARAMS ((gregset_t *, int));
+extern void fill_gregset PARAMS ((gdb_gregset_t *, int));
-extern void
-supply_fpregset PARAMS ((fpregset_t *));
+#ifdef FP0_REGNUM
+extern void supply_fpregset PARAMS ((gdb_fpregset_t *));
-extern void
-fill_fpregset PARAMS ((fpregset_t *, int));
+extern void fill_fpregset PARAMS ((gdb_fpregset_t *, int));
+#endif
/*
poll_list = (struct pollfd *) xrealloc (poll_list,
(num_poll_list + 1)
* sizeof (struct pollfd));
- poll_list[num_poll_list].fd = pi->fd;
+ poll_list[num_poll_list].fd = pi->ctl_fd;
+#ifdef UNIXWARE
+ poll_list[num_poll_list].events = POLLWRNORM;
+#else
poll_list[num_poll_list].events = POLLPRI;
+#endif
num_poll_list++;
}
+/*
+
+LOCAL FUNCTION
+
+ remove_fd -- Remove the fd from the poll/select list
+
+SYNOPSIS
+
+ static void remove_fd (struct procinfo *);
+
+DESCRIPTION
+
+ Remove the fd of the supplied procinfo from the list of fds used
+ for poll/select operations.
+ */
+
static void
remove_fd (pi)
struct procinfo *pi;
for (i = 0; i < num_poll_list; i++)
{
- if (poll_list[i].fd == pi->fd)
+ if (poll_list[i].fd == pi->ctl_fd)
{
if (i != num_poll_list - 1)
- memcpy (poll_list, poll_list + i + 1,
+ memcpy (poll_list + i, poll_list + i + 1,
(num_poll_list - i - 1) * sizeof (struct pollfd));
num_poll_list--;
}
}
-#define LOSING_POLL unixware_sux
+/*
+
+LOCAL FUNCTION
+
+ procfs_read_status - get procfs fd status
+
+SYNOPSIS
+
+ static int procfs_read_status (pi) struct procinfo *pi;
+
+DESCRIPTION
+
+ Given a pointer to a procinfo struct, get the status of
+ the status_fd in the appropriate way. Returns 0 on failure,
+ 1 on success.
+ */
+
+static int
+procfs_read_status (pi)
+ struct procinfo *pi;
+{
+#ifdef PROCFS_USE_READ_WRITE
+ if ((lseek (pi->status_fd, 0, SEEK_SET) < 0) ||
+ (read (pi->status_fd, (char *) &pi->prstatus,
+ sizeof (gdb_prstatus_t)) != sizeof (gdb_prstatus_t)))
+#else
+ if (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) < 0)
+#endif
+ return 0;
+ else
+ return 1;
+}
+
+/*
+
+LOCAL FUNCTION
+
+ procfs_write_pcwstop - send a PCWSTOP to procfs fd
+
+SYNOPSIS
+
+ static int procfs_write_pcwstop (pi) struct procinfo *pi;
+
+DESCRIPTION
+
+ Given a pointer to a procinfo struct, send a PCWSTOP to
+ the ctl_fd in the appropriate way. Returns 0 on failure,
+ 1 on success.
+ */
+
+static int
+procfs_write_pcwstop (pi)
+ struct procinfo *pi;
+{
+#ifdef PROCFS_USE_READ_WRITE
+ long cmd = PCWSTOP;
+ if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
+#else
+ if (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) < 0)
+#endif
+ return 0;
+ else
+ return 1;
+}
+
+/*
+
+LOCAL FUNCTION
+
+ procfs_write_pckill - send a kill to procfs fd
+
+SYNOPSIS
+
+ static void procfs_write_pckill (pi) struct procinfo *pi;
+
+DESCRIPTION
+
+ Given a pointer to a procinfo struct, send a kill to
+ the ctl_fd in the appropriate way. Returns 0 on failure,
+ 1 on success.
+ */
+
+static void
+procfs_write_pckill (pi)
+ struct procinfo *pi;
+{
+#ifdef PROCFS_USE_READ_WRITE
+ struct proc_ctl pctl;
+ pctl.cmd = PCKILL;
+ pctl.data = SIGKILL;
+ write (pi->ctl_fd, &pctl, sizeof (struct proc_ctl));
+#else
+ int signo = SIGKILL;
+ ioctl (pi->ctl_fd, PIOCKILL, &signo);
+#endif
+}
static struct procinfo *
wait_fd ()
{
- struct procinfo *pi;
+ struct procinfo *pi, *next_pi;
+#ifndef LOSING_POLL
int num_fds;
int i;
+#endif
- if (attach_flag)
- set_sigint_trap (); /* Causes SIGINT to be passed on to the
+ set_sigint_trap (); /* Causes SIGINT to be passed on to the
attached process. */
set_sigio_trap ();
+ wait_again:
#ifndef LOSING_POLL
- num_fds = poll (poll_list, num_poll_list, -1);
-#else
+ while (1)
+ {
+ num_fds = poll (poll_list, num_poll_list, -1);
+ if (num_fds > 0)
+ break;
+ if (num_fds < 0 && errno == EINTR)
+ continue;
+ print_sys_errmsg ("poll failed", errno);
+ error ("Poll failed, returned %d", num_fds);
+ }
+#else /* LOSING_POLL */
pi = current_procinfo;
- while (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
+ while (!procfs_write_pcwstop (pi))
{
if (errno == ENOENT)
{
else if (errno != EINTR)
{
print_sys_errmsg (pi->pathname, errno);
- error ("PIOCWSTOP failed");
+ error ("procfs_write_pcwstop failed");
}
}
pi->had_event = 1;
-#endif
+#endif /* LOSING_POLL */
- if (attach_flag)
- clear_sigint_trap();
+ clear_sigint_trap ();
clear_sigio_trap ();
#ifndef LOSING_POLL
- if (num_fds <= 0)
- {
- print_sys_errmsg ("poll failed\n", errno);
- error ("Poll failed, returned %d", num_fds);
- }
-
for (i = 0; i < num_poll_list && num_fds > 0; i++)
{
- if ((poll_list[i].revents & (POLLPRI|POLLERR|POLLHUP|POLLNVAL)) == 0)
+ if (0 == (poll_list[i].revents &
+ (POLLWRNORM | POLLPRI | POLLERR | POLLHUP | POLLNVAL)))
continue;
- for (pi = procinfo_list; pi; pi = pi->next)
+ for (pi = procinfo_list; pi; pi = next_pi)
{
- if (poll_list[i].fd == pi->fd)
+ next_pi = pi->next;
+ if (poll_list[i].fd == pi->ctl_fd)
{
- if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
- {
- print_sys_errmsg (pi->pathname, errno);
- error ("PIOCSTATUS failed");
- }
num_fds--;
+ if ((poll_list[i].revents & POLLHUP) != 0 ||
+ !procfs_read_status(pi))
+ { /* The LWP has apparently terminated. */
+ if (num_poll_list <= 1)
+ {
+ pi->prstatus.pr_flags = 0;
+ pi->had_event = 1;
+ break;
+ }
+ if (info_verbose)
+ printf_filtered ("LWP %d exited.\n",
+ (pi->pid >> 16) & 0xffff);
+ close_proc_file (pi);
+ if (num_fds != 0)
+ continue; /* already another event to process */
+ else
+ goto wait_again; /* wait for another event */
+ }
pi->had_event = 1;
break;
}
}
if (!pi)
- error ("procfs_wait: Couldn't find procinfo for fd %d\n",
+ error ("wait_fd: Couldn't find procinfo for fd %d\n",
poll_list[i].fd);
}
#endif /* LOSING_POLL */
int syscallnum;
{
static char locbuf[32];
- char *rtnval;
- if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS)
- {
- rtnval = syscall_table[syscallnum];
- }
+ if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS
+ && syscall_table[syscallnum] != NULL)
+ return syscall_table[syscallnum];
else
{
sprintf (locbuf, "syscall %u", syscallnum);
- rtnval = locbuf;
+ return locbuf;
}
- return (rtnval);
}
/*
#if defined (SYS_sys3b)
syscall_table[SYS_sys3b] = "sys3b";
#endif
+#if defined (SYS_sysi86)
+ syscall_table[SYS_sysi86] = "sysi86";
+#endif
#if defined (SYS_acct)
syscall_table[SYS_acct] = "acct";
#endif
#if defined (SYS_sproc)
syscall_table[SYS_sproc] = "sproc";
#endif
-}
-
-/*
-
-LOCAL FUNCTION
-
- procfs_kill_inferior - kill any currently inferior
-
-SYNOPSIS
-
- void procfs_kill_inferior (void)
-
-DESCRIPTION
-
- Kill any current inferior.
-
-NOTES
-
- Kills even attached inferiors. Presumably the user has already
- been prompted that the inferior is an attached one rather than
- one started by gdb. (FIXME?)
-
-*/
-
-static void
-procfs_kill_inferior ()
-{
- target_mourn_inferior ();
-}
-
-/*
-
-LOCAL FUNCTION
-
- unconditionally_kill_inferior - terminate the inferior
-
-SYNOPSIS
+#if defined (SYS_keyctl)
+ syscall_table[SYS_keyctl] = "keyctl";
+#endif
+#if defined (SYS_secsys)
+ syscall_table[SYS_secsys] = "secsys";
+#endif
+#if defined (SYS_filepriv)
+ syscall_table[SYS_filepriv] = "filepriv";
+#endif
+#if defined (SYS_procpriv)
+ syscall_table[SYS_procpriv] = "procpriv";
+#endif
+#if defined (SYS_devstat)
+ syscall_table[SYS_devstat] = "devstat";
+#endif
+#if defined (SYS_aclipc)
+ syscall_table[SYS_aclipc] = "aclipc";
+#endif
+#if defined (SYS_fdevstat)
+ syscall_table[SYS_fdevstat] = "fdevstat";
+#endif
+#if defined (SYS_flvlfile)
+ syscall_table[SYS_flvlfile] = "flvlfile";
+#endif
+#if defined (SYS_lvlfile)
+ syscall_table[SYS_lvlfile] = "lvlfile";
+#endif
+#if defined (SYS_lvlequal)
+ syscall_table[SYS_lvlequal] = "lvlequal";
+#endif
+#if defined (SYS_lvlproc)
+ syscall_table[SYS_lvlproc] = "lvlproc";
+#endif
+#if defined (SYS_lvlipc)
+ syscall_table[SYS_lvlipc] = "lvlipc";
+#endif
+#if defined (SYS_acl)
+ syscall_table[SYS_acl] = "acl";
+#endif
+#if defined (SYS_auditevt)
+ syscall_table[SYS_auditevt] = "auditevt";
+#endif
+#if defined (SYS_auditctl)
+ syscall_table[SYS_auditctl] = "auditctl";
+#endif
+#if defined (SYS_auditdmp)
+ syscall_table[SYS_auditdmp] = "auditdmp";
+#endif
+#if defined (SYS_auditlog)
+ syscall_table[SYS_auditlog] = "auditlog";
+#endif
+#if defined (SYS_auditbuf)
+ syscall_table[SYS_auditbuf] = "auditbuf";
+#endif
+#if defined (SYS_lvldom)
+ syscall_table[SYS_lvldom] = "lvldom";
+#endif
+#if defined (SYS_lvlvfs)
+ syscall_table[SYS_lvlvfs] = "lvlvfs";
+#endif
+#if defined (SYS_mkmld)
+ syscall_table[SYS_mkmld] = "mkmld";
+#endif
+#if defined (SYS_mldmode)
+ syscall_table[SYS_mldmode] = "mldmode";
+#endif
+#if defined (SYS_secadvise)
+ syscall_table[SYS_secadvise] = "secadvise";
+#endif
+#if defined (SYS_online)
+ syscall_table[SYS_online] = "online";
+#endif
+#if defined (SYS_setitimer)
+ syscall_table[SYS_setitimer] = "setitimer";
+#endif
+#if defined (SYS_getitimer)
+ syscall_table[SYS_getitimer] = "getitimer";
+#endif
+#if defined (SYS_gettimeofday)
+ syscall_table[SYS_gettimeofday] = "gettimeofday";
+#endif
+#if defined (SYS_settimeofday)
+ syscall_table[SYS_settimeofday] = "settimeofday";
+#endif
+#if defined (SYS_lwp_create)
+ syscall_table[SYS_lwp_create] = "_lwp_create";
+#endif
+#if defined (SYS_lwp_exit)
+ syscall_table[SYS_lwp_exit] = "_lwp_exit";
+#endif
+#if defined (SYS_lwp_wait)
+ syscall_table[SYS_lwp_wait] = "_lwp_wait";
+#endif
+#if defined (SYS_lwp_self)
+ syscall_table[SYS_lwp_self] = "_lwp_self";
+#endif
+#if defined (SYS_lwp_info)
+ syscall_table[SYS_lwp_info] = "_lwp_info";
+#endif
+#if defined (SYS_lwp_private)
+ syscall_table[SYS_lwp_private] = "_lwp_private";
+#endif
+#if defined (SYS_processor_bind)
+ syscall_table[SYS_processor_bind] = "processor_bind";
+#endif
+#if defined (SYS_processor_exbind)
+ syscall_table[SYS_processor_exbind] = "processor_exbind";
+#endif
+#if defined (SYS_prepblock)
+ syscall_table[SYS_prepblock] = "prepblock";
+#endif
+#if defined (SYS_block)
+ syscall_table[SYS_block] = "block";
+#endif
+#if defined (SYS_rdblock)
+ syscall_table[SYS_rdblock] = "rdblock";
+#endif
+#if defined (SYS_unblock)
+ syscall_table[SYS_unblock] = "unblock";
+#endif
+#if defined (SYS_cancelblock)
+ syscall_table[SYS_cancelblock] = "cancelblock";
+#endif
+#if defined (SYS_pread)
+ syscall_table[SYS_pread] = "pread";
+#endif
+#if defined (SYS_pwrite)
+ syscall_table[SYS_pwrite] = "pwrite";
+#endif
+#if defined (SYS_truncate)
+ syscall_table[SYS_truncate] = "truncate";
+#endif
+#if defined (SYS_ftruncate)
+ syscall_table[SYS_ftruncate] = "ftruncate";
+#endif
+#if defined (SYS_lwp_kill)
+ syscall_table[SYS_lwp_kill] = "_lwp_kill";
+#endif
+#if defined (SYS_sigwait)
+ syscall_table[SYS_sigwait] = "sigwait";
+#endif
+#if defined (SYS_fork1)
+ syscall_table[SYS_fork1] = "fork1";
+#endif
+#if defined (SYS_forkall)
+ syscall_table[SYS_forkall] = "forkall";
+#endif
+#if defined (SYS_modload)
+ syscall_table[SYS_modload] = "modload";
+#endif
+#if defined (SYS_moduload)
+ syscall_table[SYS_moduload] = "moduload";
+#endif
+#if defined (SYS_modpath)
+ syscall_table[SYS_modpath] = "modpath";
+#endif
+#if defined (SYS_modstat)
+ syscall_table[SYS_modstat] = "modstat";
+#endif
+#if defined (SYS_modadm)
+ syscall_table[SYS_modadm] = "modadm";
+#endif
+#if defined (SYS_getksym)
+ syscall_table[SYS_getksym] = "getksym";
+#endif
+#if defined (SYS_lwp_suspend)
+ syscall_table[SYS_lwp_suspend] = "_lwp_suspend";
+#endif
+#if defined (SYS_lwp_continue)
+ syscall_table[SYS_lwp_continue] = "_lwp_continue";
+#endif
+#if defined (SYS_priocntllst)
+ syscall_table[SYS_priocntllst] = "priocntllst";
+#endif
+#if defined (SYS_sleep)
+ syscall_table[SYS_sleep] = "sleep";
+#endif
+#if defined (SYS_lwp_sema_wait)
+ syscall_table[SYS_lwp_sema_wait] = "_lwp_sema_wait";
+#endif
+#if defined (SYS_lwp_sema_post)
+ syscall_table[SYS_lwp_sema_post] = "_lwp_sema_post";
+#endif
+#if defined (SYS_lwp_sema_trywait)
+ syscall_table[SYS_lwp_sema_trywait] = "lwp_sema_trywait";
+#endif
+#if defined(SYS_fstatvfs64)
+ syscall_table[SYS_fstatvfs64] = "fstatvfs64";
+#endif
+#if defined(SYS_statvfs64)
+ syscall_table[SYS_statvfs64] = "statvfs64";
+#endif
+#if defined(SYS_ftruncate64)
+ syscall_table[SYS_ftruncate64] = "ftruncate64";
+#endif
+#if defined(SYS_truncate64)
+ syscall_table[SYS_truncate64] = "truncate64";
+#endif
+#if defined(SYS_getrlimit64)
+ syscall_table[SYS_getrlimit64] = "getrlimit64";
+#endif
+#if defined(SYS_setrlimit64)
+ syscall_table[SYS_setrlimit64] = "setrlimit64";
+#endif
+#if defined(SYS_lseek64)
+ syscall_table[SYS_lseek64] = "lseek64";
+#endif
+#if defined(SYS_mmap64)
+ syscall_table[SYS_mmap64] = "mmap64";
+#endif
+#if defined(SYS_pread64)
+ syscall_table[SYS_pread64] = "pread64";
+#endif
+#if defined(SYS_creat64)
+ syscall_table[SYS_creat64] = "creat64";
+#endif
+#if defined(SYS_dshmsys)
+ syscall_table[SYS_dshmsys] = "dshmsys";
+#endif
+#if defined(SYS_invlpg)
+ syscall_table[SYS_invlpg] = "invlpg";
+#endif
+#if defined(SYS_cg_ids)
+ syscall_table[SYS_cg_ids] = "cg_ids";
+#endif
+#if defined(SYS_cg_processors)
+ syscall_table[SYS_cg_processors] = "cg_processors";
+#endif
+#if defined(SYS_cg_info)
+ syscall_table[SYS_cg_info] = "cg_info";
+#endif
+#if defined(SYS_cg_bind)
+ syscall_table[SYS_cg_bind] = "cg_bind";
+#endif
+#if defined(SYS_cg_current)
+ syscall_table[SYS_cg_current] = "cg_current";
+#endif
+#if defined(SYS_cg_memloc)
+ syscall_table[SYS_cg_memloc] = "cg_memloc";
+#endif
+}
+
+/*
+
+LOCAL FUNCTION
+
+ procfs_kill_inferior - kill any currently inferior
+
+SYNOPSIS
+
+ void procfs_kill_inferior (void)
+
+DESCRIPTION
+
+ Kill any current inferior.
+
+NOTES
+
+ Kills even attached inferiors. Presumably the user has already
+ been prompted that the inferior is an attached one rather than
+ one started by gdb. (FIXME?)
+
+*/
+
+static void
+procfs_kill_inferior ()
+{
+ target_mourn_inferior ();
+}
+
+/*
+
+LOCAL FUNCTION
+
+ unconditionally_kill_inferior - terminate the inferior
+
+SYNOPSIS
static void unconditionally_kill_inferior (struct procinfo *)
unconditionally_kill_inferior (pi)
struct procinfo *pi;
{
- int signo;
int ppid;
+ struct proc_ctl pctl;
ppid = pi->prstatus.pr_ppid;
- signo = SIGKILL;
- ioctl (pi->fd, PIOCKILL, &signo);
+#ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL
+ /* Alpha OSF/1-3.x procfs needs a clear of the current signal
+ before the PIOCKILL, otherwise it might generate a corrupted core
+ file for the inferior. */
+ ioctl (pi->ctl_fd, PIOCSSIG, NULL);
+#endif
+#ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL
+ /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal
+ to kill the inferior, otherwise it might remain stopped with a
+ pending SIGKILL.
+ We do not check the result of the PIOCSSIG, the inferior might have
+ died already. */
+ {
+ struct siginfo newsiginfo;
+
+ memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
+ newsiginfo.si_signo = SIGKILL;
+ newsiginfo.si_code = 0;
+ newsiginfo.si_errno = 0;
+ newsiginfo.si_pid = getpid ();
+ newsiginfo.si_uid = getuid ();
+ ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo);
+ }
+#else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
+ procfs_write_pckill (pi);
+#endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
+
close_proc_file (pi);
/* Only wait() for our direct children. Our grandchildren zombies are killed
pi = current_procinfo;
- if (lseek(pi->fd, (off_t) memaddr, 0) == (off_t) memaddr)
+ if (lseek(pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr)
{
if (dowrite)
{
- nbytes = write (pi->fd, myaddr, len);
+ nbytes = write (pi->as_fd, myaddr, len);
}
else
{
- nbytes = read (pi->fd, myaddr, len);
+ nbytes = read (pi->as_fd, myaddr, len);
}
if (nbytes < 0)
{
int regno;
{
struct procinfo *pi;
+#ifdef PROCFS_USE_READ_WRITE
+ struct greg_ctl greg;
+ struct fpreg_ctl fpreg;
+#endif
pi = current_procinfo;
+#ifdef PROCFS_USE_READ_WRITE
+ if (regno != -1)
+ {
+ procfs_read_status (pi);
+ memcpy ((char *) &greg.gregset,
+ (char *) &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs,
+ sizeof (gdb_gregset_t));
+ }
+ fill_gregset (&greg.gregset, regno);
+ greg.cmd = PCSREG;
+ write (pi->ctl_fd, &greg, sizeof (greg));
+#else /* PROCFS_USE_READ_WRITE */
if (regno != -1)
{
- ioctl (pi->fd, PIOCGREG, &pi->gregset);
+ ioctl (pi->ctl_fd, PIOCGREG, &pi->gregset.gregset);
}
- fill_gregset (&pi->gregset, regno);
- ioctl (pi->fd, PIOCSREG, &pi->gregset);
+ fill_gregset (&pi->gregset.gregset, regno);
+ ioctl (pi->ctl_fd, PIOCSREG, &pi->gregset.gregset);
+#endif /* PROCFS_USE_READ_WRITE */
#if defined (FP0_REGNUM)
target has floating point hardware. Since we ignore the returned value,
we'll never know whether it worked or not anyway. */
+#ifdef PROCFS_USE_READ_WRITE
+ if (regno != -1)
+ {
+ procfs_read_status (pi);
+ memcpy ((char *) &fpreg.fpregset,
+ (char *) &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs,
+ sizeof (gdb_fpregset_t));
+ }
+ fill_fpregset (&fpreg.fpregset, regno);
+ fpreg.cmd = PCSFPREG;
+ write (pi->ctl_fd, &fpreg, sizeof (fpreg));
+#else /* PROCFS_USE_READ_WRITE */
if (regno != -1)
{
- ioctl (pi->fd, PIOCGFPREG, &pi->fpregset);
+ ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset.fpregset);
}
- fill_fpregset (&pi->fpregset, regno);
- ioctl (pi->fd, PIOCSFPREG, &pi->fpregset);
+ fill_fpregset (&pi->fpregset.fpregset, regno);
+ ioctl (pi->ctl_fd, PIOCSFPREG, &pi->fpregset.fpregset);
+#endif /* PROCFS_USE_READ_WRITE */
#endif /* FP0_REGNUM */
LOCAL FUNCTION
- create_procinfo - initialize access to a /proc entry
+ init_procinfo - setup a procinfo struct and connect it to a process
SYNOPSIS
- struct procinfo * create_procinfo (int pid)
+ struct procinfo * init_procinfo (int pid)
DESCRIPTION
Allocate a procinfo structure, open the /proc file and then set up the
set of signals and faults that are to be traced. Returns a pointer to
- the new procinfo structure.
+ the new procinfo structure.
NOTES
*/
static struct procinfo *
-create_procinfo (pid)
+init_procinfo (pid, kill)
int pid;
+ int kill;
{
- struct procinfo *pi;
+ struct procinfo *pi = (struct procinfo *)
+ xmalloc (sizeof (struct procinfo));
+ struct sig_ctl sctl;
+ struct flt_ctl fctl;
- if (find_procinfo (pid, 1))
- return; /* All done! It already exists */
+ memset ((char *) pi, 0, sizeof (*pi));
+ if (!open_proc_file (pid, pi, O_RDWR, 1))
+ proc_init_failed (pi, "can't open process file", kill);
- pi = (struct procinfo *) xmalloc (sizeof (struct procinfo));
+ /* open_proc_file may modify pid. */
- if (!open_proc_file (pid, pi, O_RDWR))
- proc_init_failed (pi, "can't open process file");
+ pid = pi -> pid;
/* Add new process to process info list */
add_fd (pi); /* Add to list for poll/select */
+ /* Remember some things about the inferior that we will, or might, change
+ so that we can restore them when we detach. */
+#ifdef UNIXWARE
+ memcpy ((char *) &pi->saved_trace.sigset,
+ (char *) &pi->prstatus.pr_sigtrace, sizeof (sigset_t));
+ memcpy ((char *) &pi->saved_fltset.fltset,
+ (char *) &pi->prstatus.pr_flttrace, sizeof (fltset_t));
+ memcpy ((char *) &pi->saved_entryset.sysset,
+ (char *) &pi->prstatus.pr_sysentry, sizeof (sysset_t));
+ memcpy ((char *) &pi->saved_exitset.sysset,
+ (char *) &pi->prstatus.pr_sysexit, sizeof (sysset_t));
+
+ /* Set up trace and fault sets, as gdb expects them. */
+
+ prfillset (&sctl.sigset);
+ notice_signals (pi, &sctl);
+ prfillset (&fctl.fltset);
+ prdelset (&fctl.fltset, FLTPAGE);
+
+#else /* ! UNIXWARE */
+ ioctl (pi->ctl_fd, PIOCGTRACE, &pi->saved_trace.sigset);
+ ioctl (pi->ctl_fd, PIOCGHOLD, &pi->saved_sighold.sigset);
+ ioctl (pi->ctl_fd, PIOCGFAULT, &pi->saved_fltset.fltset);
+ ioctl (pi->ctl_fd, PIOCGENTRY, &pi->saved_entryset.sysset);
+ ioctl (pi->ctl_fd, PIOCGEXIT, &pi->saved_exitset.sysset);
+
+ /* Set up trace and fault sets, as gdb expects them. */
+
memset ((char *) &pi->prrun, 0, sizeof (pi->prrun));
prfillset (&pi->prrun.pr_trace);
procfs_notice_signals (pid);
prfillset (&pi->prrun.pr_fault);
prdelset (&pi->prrun.pr_fault, FLTPAGE);
+#ifdef PROCFS_DONT_TRACE_FAULTS
+ premptyset (&pi->prrun.pr_fault);
+#endif
+#endif /* UNIXWARE */
- if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
- proc_init_failed (pi, "PIOCWSTOP failed");
-
- if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault) < 0)
- proc_init_failed (pi, "PIOCSFAULT failed");
+ if (!procfs_read_status (pi))
+ proc_init_failed (pi, "procfs_read_status failed", kill);
return pi;
}
LOCAL FUNCTION
- procfs_init_inferior - initialize target vector and access to a
- /proc entry
+ create_procinfo - initialize access to a /proc entry
SYNOPSIS
- void procfs_init_inferior (int pid)
+ struct procinfo * create_procinfo (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.
+ Allocate a procinfo structure, open the /proc file and then set up the
+ set of signals and faults that are to be traced. Returns a pointer to
+ the new procinfo structure.
NOTES
*/
-static void
-procfs_init_inferior (pid)
+static struct procinfo *
+create_procinfo (pid)
int pid;
{
- push_target (&procfs_ops);
+ struct procinfo *pi;
+ struct sig_ctl sctl;
+ struct flt_ctl fctl;
- create_procinfo (pid);
- add_thread (pid); /* Setup initial thread */
+ pi = find_procinfo (pid, 1);
+ if (pi != NULL)
+ return pi; /* All done! It already exists */
- /* One trap to exec the shell, one to exec the program being debugged. */
- startup_inferior (2);
+ pi = init_procinfo (pid, 1);
+
+#ifndef UNIXWARE
+/* A bug in Solaris (2.5 at least) causes PIOCWSTOP to hang on LWPs that are
+ already stopped, even if they all have PR_ASYNC set. */
+ if (!(pi->prstatus.pr_flags & PR_STOPPED))
+#endif
+ if (!procfs_write_pcwstop (pi))
+ proc_init_failed (pi, "procfs_write_pcwstop failed", 1);
+
+#ifdef PROCFS_USE_READ_WRITE
+ fctl.cmd = PCSFAULT;
+ if (write (pi->ctl_fd, (char *) &fctl, sizeof (struct flt_ctl)) < 0)
+ proc_init_failed (pi, "PCSFAULT failed", 1);
+#else
+ if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->prrun.pr_fault) < 0)
+ proc_init_failed (pi, "PIOCSFAULT failed", 1);
+#endif
+
+ return pi;
}
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
- procfs_notice_signals
+ procfs_exit_handler - handle entry into the _exit syscall
SYNOPSIS
- static void procfs_notice_signals (int pid);
+ int procfs_exit_handler (pi, syscall_num, why, rtnvalp, statvalp)
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.
+ This routine is called when an inferior process enters the _exit()
+ system call. It continues the process, and then collects the exit
+ status and pid which are returned in *statvalp and *rtnvalp. After
+ that it returns non-zero to indicate that procfs_wait should wake up.
+
+NOTES
+ There is probably a better way to do this.
- One thing it does is that signals for which the state is "nostop",
- "noprint", and "pass", have their trace bits reset in the pr_trace
- field, so that they are no longer traced. This allows them to be
- delivered directly to the inferior without the debugger ever being
- involved.
*/
-static void
-procfs_notice_signals (pid)
- int pid;
+static int
+procfs_exit_handler (pi, syscall_num, why, rtnvalp, statvalp)
+ struct procinfo *pi;
+ int syscall_num;
+ int why;
+ int *rtnvalp;
+ int *statvalp;
{
- int signo;
- struct procinfo *pi;
+ struct procinfo *temp_pi, *next_pi;
+ struct proc_ctl pctl;
- pi = find_procinfo (pid, 0);
+#ifdef UNIXWARE
+ pctl.cmd = PCRUN;
+ pctl.data = PRCFAULT;
+#else
+ pi->prrun.pr_flags = PRCFAULT;
+#endif
- for (signo = 0; signo < NSIG; signo++)
+#ifdef PROCFS_USE_READ_WRITE
+ if (write (pi->ctl_fd, (char *)&pctl, sizeof (struct proc_ctl)) < 0)
+#else
+ if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
+#endif
+ perror_with_name (pi->pathname);
+
+ if (attach_flag)
{
- if (signal_stop_state (target_signal_from_host (signo)) == 0 &&
- signal_print_state (target_signal_from_host (signo)) == 0 &&
- signal_pass_state (target_signal_from_host (signo)) == 1)
- {
- prdelset (&pi->prrun.pr_trace, signo);
- }
- else
- {
- praddset (&pi->prrun.pr_trace, signo);
- }
+ /* Claim it exited (don't call wait). */
+ if (info_verbose)
+ printf_filtered ("(attached process has exited)\n");
+ *statvalp = 0;
+ *rtnvalp = inferior_pid;
}
- if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace))
+ else
{
- print_sys_errmsg ("PIOCSTRACE failed", errno);
+ *rtnvalp = wait (statvalp);
+ if (*rtnvalp >= 0)
+ *rtnvalp = pi->pid;
+ }
+
+ /* Close ALL open proc file handles,
+ except the one that called SYS_exit. */
+ for (temp_pi = procinfo_list; temp_pi; temp_pi = next_pi)
+ {
+ next_pi = temp_pi->next;
+ if (temp_pi == pi)
+ continue; /* Handled below */
+ close_proc_file (temp_pi);
}
+ return 1;
}
/*
LOCAL FUNCTION
- proc_set_exec_trap -- arrange for exec'd child to halt at startup
+ procfs_exec_handler - handle exit from the exec family of syscalls
SYNOPSIS
- void proc_set_exec_trap (void)
+ int procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp)
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
+ This routine is called when an inferior process is about to finish any
+ of the exec() family of system calls. It pretends that we got a
+ SIGTRAP (for compatibility with ptrace behavior), and returns non-zero
+ to tell procfs_wait to wake up.
- 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.
+NOTES
+ This need for compatibility with ptrace is questionable. In the
+ future, it shouldn't be necessary.
- 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 ()
+static int
+procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp)
+ struct procinfo *pi;
+ int syscall_num;
+ int why;
+ int *rtnvalp;
+ int *statvalp;
{
- sysset_t exitset;
- sysset_t entryset;
- auto char procname[32];
- int fd;
-
- sprintf (procname, PROC_NAME_FMT, getpid ());
- if ((fd = open (procname, O_RDWR)) < 0)
- {
- perror (procname);
- gdb_flush (gdb_stderr);
- _exit (127);
- }
- premptyset (&exitset);
- premptyset (&entryset);
+ *statvalp = (SIGTRAP << 8) | 0177;
- /* 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. */
+ return 1;
+}
-#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);
- gdb_flush (gdb_stderr);
- _exit (127);
- }
-
- praddset (&entryset, SYS_exit);
-
- if (ioctl (fd, PIOCSENTRY, &entryset) < 0)
- {
- perror (procname);
- gdb_flush (gdb_stderr);
- _exit (126);
- }
-
- /* Turn off inherit-on-fork flag so that all grand-children of gdb
- start with tracing flags cleared. */
-
-#if defined (PIOCRESET) /* New method */
- {
- long pr_flags;
- pr_flags = PR_FORK;
- ioctl (fd, PIOCRESET, &pr_flags);
- }
-#else
-#if defined (PIOCRFORK) /* Original method */
- ioctl (fd, PIOCRFORK, NULL);
-#endif
-#endif
-
- /* Turn on run-on-last-close flag so that this process will not hang
- if GDB goes away for some reason. */
-
-#if defined (PIOCSET) /* New method */
- {
- long pr_flags;
- pr_flags = PR_RLC;
- (void) ioctl (fd, PIOCSET, &pr_flags);
- }
-#else
-#if defined (PIOCSRLC) /* Original method */
- (void) ioctl (fd, PIOCSRLC, 0);
-#endif
-#endif
-}
+#if defined(SYS_sproc) && !defined(UNIXWARE)
+/* IRIX lwp creation system call */
/*
-GLOBAL FUNCTION
+LOCAL FUNCTION
- proc_iterate_over_mappings -- call function for every mapped space
+ procfs_sproc_handler - handle exit from the sproc syscall
SYNOPSIS
- int proc_iterate_over_mappings (int (*func)())
+ int procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp)
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.
+ This routine is called when an inferior process is about to finish an
+ sproc() system call. This is the system call that IRIX uses to create
+ a lightweight process. When the target process gets this event, we can
+ look at rval1 to find the new child processes ID, and create a new
+ procinfo struct from that.
+
+ After that, it pretends that we got a SIGTRAP, and returns non-zero
+ to tell procfs_wait to wake up. Subsequently, wait_for_inferior gets
+ woken up, sees the new process and continues it.
+
+NOTES
+ We actually never see the child exiting from sproc because we will
+ shortly stop the child with PIOCSTOP, which is then registered as the
+ event of interest.
*/
-int
-proc_iterate_over_mappings (func)
- int (*func) PARAMS ((int, CORE_ADDR));
+static int
+procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp)
+ struct procinfo *pi;
+ int syscall_num;
+ int why;
+ int *rtnvalp;
+ int *statvalp;
{
- int nmap;
- int fd;
- int funcstat = 0;
- struct prmap *prmaps;
- struct prmap *prmap;
- struct procinfo *pi;
+/* We've just detected the completion of an sproc system call. Now we need to
+ setup a procinfo struct for this thread, and notify the thread system of the
+ new arrival. */
- pi = current_procinfo;
+/* If sproc failed, then nothing interesting happened. Continue the process
+ and go back to sleep. */
- if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0)
+ if (pi->prstatus.pr_errno != 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 (pi, (CORE_ADDR) prmap -> pr_vaddr, 0);
- funcstat = (*func) (fd, (CORE_ADDR) prmap -> pr_vaddr);
- close (fd);
- }
- }
- }
- return (funcstat);
-}
-
-#if 0 /* Currently unused */
-/*
-
-GLOBAL FUNCTION
-
- proc_base_address -- find base address for segment containing address
-
-SYNOPSIS
-
- CORE_ADDR proc_base_address (CORE_ADDR addr)
+ pi->prrun.pr_flags &= PRSTEP;
+ pi->prrun.pr_flags |= PRCFAULT;
-DESCRIPTION
+ if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
+ perror_with_name (pi->pathname);
- Given an address of a location in the inferior, find and return
- the base address of the mapped segment containing that address.
+ return 0;
+ }
- 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.
-*/
+ /* At this point, the new thread is stopped at it's first instruction, and
+ the parent is stopped at the exit from sproc. */
-CORE_ADDR
-proc_base_address (addr)
- CORE_ADDR addr;
-{
- int nmap;
- struct prmap *prmaps;
- struct prmap *prmap;
- CORE_ADDR baseaddr = 0;
- struct procinfo *pi;
+ /* Notify the caller of the arrival of a new thread. */
+ create_procinfo (pi->prstatus.pr_rval1);
- pi = current_procinfo;
+ *rtnvalp = pi->prstatus.pr_rval1;
+ *statvalp = (SIGTRAP << 8) | 0177;
- if (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);
+ return 1;
}
-#endif /* 0 */
-
/*
LOCAL FUNCTION
- proc_address_to_fd -- return open fd for file mapped to address
+ procfs_fork_handler - handle exit from the fork syscall
SYNOPSIS
- int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
+ int procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp)
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).
+ This routine is called when an inferior process is about to finish a
+ fork() system call. We will open up the new process, and then close
+ it, which releases it from the clutches of the debugger.
-*/
+ After that, we continue the target process as though nothing had
+ happened.
+
+NOTES
+ This is necessary for IRIX because we have to set PR_FORK in order
+ to catch the creation of lwps (via sproc()). When an actual fork
+ occurs, it becomes necessary to reset the forks debugger flags and
+ continue it because we can't hack multiple processes yet.
+ */
static int
-proc_address_to_fd (pi, addr, complain)
+procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp)
struct procinfo *pi;
- CORE_ADDR addr;
- int complain;
+ int syscall_num;
+ int why;
+ int *rtnvalp;
+ int *statvalp;
{
- int fd = -1;
+ struct procinfo *pitemp;
- 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);
-}
+/* At this point, we've detected the completion of a fork (or vfork) call in
+ our child. The grandchild is also stopped because we set inherit-on-fork
+ earlier. (Note that nobody has the grandchilds' /proc file open at this
+ point.) We will release the grandchild from the debugger by opening it's
+ /proc file and then closing it. Since run-on-last-close is set, the
+ grandchild continues on its' merry way. */
-/* Attach to process PID, then initialize for debugging it
- and wait for the trace-trap that results from attaching. */
+ pitemp = create_procinfo (pi->prstatus.pr_rval1);
+ if (pitemp)
+ close_proc_file (pitemp);
-static void
-procfs_attach (args, from_tty)
- char *args;
- int from_tty;
-{
- char *exec_file;
- int pid;
+ if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
+ perror_with_name (pi->pathname);
- if (!args)
- error_no_arg ("process-id to attach");
+ return 0;
+}
+#endif /* SYS_sproc && !UNIXWARE */
- pid = atoi (args);
+/*
- if (pid == getpid()) /* Trying to masturbate? */
- error ("I refuse to debug myself!");
+LOCAL FUNCTION
- if (from_tty)
- {
- exec_file = (char *) get_exec_file (0);
+ procfs_set_inferior_syscall_traps - setup the syscall traps
- if (exec_file)
- printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, target_pid_to_str (pid));
- else
- printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid));
+SYNOPSIS
- gdb_flush (gdb_stdout);
- }
+ void procfs_set_inferior_syscall_traps (struct procinfo *pip)
- do_attach (pid);
- inferior_pid = pid;
- push_target (&procfs_ops);
-}
+DESCRIPTION
+ Called for each "procinfo" (process, thread, or LWP) in the
+ inferior, to register for notification of and handlers for
+ syscall traps in the inferior.
-/* 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;
+procfs_set_inferior_syscall_traps (pip)
+ struct procinfo *pip;
{
- int siggnal = 0;
+ procfs_set_syscall_trap (pip, SYS_exit, PROCFS_SYSCALL_ENTRY,
+ procfs_exit_handler);
- if (from_tty)
- {
- char *exec_file = get_exec_file (0);
- if (exec_file == 0)
- exec_file = "";
- printf_unfiltered ("Detaching from program: %s %s\n",
- exec_file, target_pid_to_str (inferior_pid));
- gdb_flush (gdb_stdout);
- }
- if (args)
- siggnal = atoi (args);
-
- do_detach (siggnal);
- inferior_pid = 0;
- unpush_target (&procfs_ops); /* Pop out of handling an inferior */
-}
+#ifndef PRFS_STOPEXEC
+#ifdef SYS_exec
+ procfs_set_syscall_trap (pip, SYS_exec, PROCFS_SYSCALL_EXIT,
+ procfs_exec_handler);
+#endif
+#ifdef SYS_execv
+ procfs_set_syscall_trap (pip, SYS_execv, PROCFS_SYSCALL_EXIT,
+ procfs_exec_handler);
+#endif
+#ifdef SYS_execve
+ procfs_set_syscall_trap (pip, SYS_execve, PROCFS_SYSCALL_EXIT,
+ procfs_exec_handler);
+#endif
+#endif /* PRFS_STOPEXEC */
-/* 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. */
+ /* Setup traps on exit from sproc() */
-static void
-procfs_prepare_to_store ()
-{
-#ifdef CHILD_PREPARE_TO_STORE
- CHILD_PREPARE_TO_STORE ();
+#ifdef SYS_sproc
+ procfs_set_syscall_trap (pip, SYS_sproc, PROCFS_SYSCALL_EXIT,
+ procfs_sproc_handler);
+ procfs_set_syscall_trap (pip, SYS_fork, PROCFS_SYSCALL_EXIT,
+ procfs_fork_handler);
+#ifdef SYS_vfork
+ procfs_set_syscall_trap (pip, SYS_vfork, PROCFS_SYSCALL_EXIT,
+ procfs_fork_handler);
#endif
-}
-
-/* Print status information about what we're accessing. */
+/* Turn on inherit-on-fork flag so that all children of the target process
+ start with tracing flags set. This allows us to trap lwp creation. Note
+ that we also have to trap on fork and vfork in order to disable all tracing
+ in the targets child processes. */
-static void
-procfs_files_info (ignore)
- struct target_ops *ignore;
-{
- printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
- attach_flag? "attached": "child", target_pid_to_str (inferior_pid));
-}
+ modify_inherit_on_fork_flag (pip->ctl_fd, 1);
+#endif
-/* ARGSUSED */
-static void
-procfs_open (arg, from_tty)
- char *arg;
- int from_tty;
-{
- error ("Use the \"run\" command to start a Unix child process.");
+#ifdef SYS_lwp_create
+ procfs_set_syscall_trap (pip, SYS_lwp_create, PROCFS_SYSCALL_EXIT,
+ procfs_lwp_creation_handler);
+#endif
}
/*
LOCAL FUNCTION
- do_attach -- attach to an already existing process
+ procfs_init_inferior - initialize target vector and access to a
+ /proc entry
SYNOPSIS
- int do_attach (int pid)
+ void procfs_init_inferior (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.
+ 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. Returns the pid, which may have had
+ the thread-id added to it.
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)
+ If proc_init_failed ever gets called, control returns to the command
+ processing loop via the standard error handling code.
-*/
+ */
-static int
-do_attach (pid)
+static void
+procfs_init_inferior (pid)
int pid;
{
- int result;
- struct procinfo *pi;
+ struct procinfo *pip;
- pi = (struct procinfo *) xmalloc (sizeof (struct procinfo));
+ push_target (&procfs_ops);
- if (!open_proc_file (pid, pi, O_RDWR))
- {
- free (pi);
- perror_with_name (pi->pathname);
- /* NOTREACHED */
- }
-
- /* Add new process to process info list */
+ pip = create_procinfo (pid);
- pi->next = procinfo_list;
- procinfo_list = pi;
+ procfs_set_inferior_syscall_traps (pip);
- add_fd (pi); /* Add to list for poll/select */
+ /* create_procinfo may change the pid, so we have to update inferior_pid
+ here before calling other gdb routines that need the right pid. */
- /* 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);
- }
+ pid = pip -> pid;
+ inferior_pid = pid;
+
+ add_thread (pip -> pid); /* Setup initial thread */
+
+#ifdef START_INFERIOR_TRAPS_EXPECTED
+ startup_inferior (START_INFERIOR_TRAPS_EXPECTED);
+#else
+ /* One trap to exec the shell, one to exec the program being debugged. */
+ startup_inferior (2);
+#endif
+}
+
+/*
+
+GLOBAL FUNCTION
+
+ procfs_notice_signals
+
+SYNOPSIS
+
+ static void procfs_notice_signals (int pid);
+
+DESCRIPTION
+
+ When the user changes the state of gdb's signal handling via the
+ "handle" command, this function gets called to see if any change
+ in the /proc interface is required. It is also called internally
+ by other /proc interface functions to initialize the state of
+ the traced signal set.
+
+ One thing it does is that signals for which the state is "nostop",
+ "noprint", and "pass", have their trace bits reset in the pr_trace
+ field, so that they are no longer traced. This allows them to be
+ delivered directly to the inferior without the debugger ever being
+ involved.
+ */
+
+static void
+procfs_notice_signals (pid)
+ int pid;
+{
+ struct procinfo *pi;
+ struct sig_ctl sctl;
+
+ pi = find_procinfo (pid, 0);
+
+#ifdef UNIXWARE
+ premptyset (&sctl.sigset);
#else
-#if defined (PIOCSRLC) /* Original method */
- result = ioctl (pi->fd, PIOCSRLC, 0);
+ sctl.sigset = pi->prrun.pr_trace;
#endif
+
+ notice_signals (pi, &sctl);
+
+#ifndef UNIXWARE
+ pi->prrun.pr_trace = sctl.sigset;
#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;
+}
+
+static void
+notice_signals (pi, sctl)
+ struct procinfo *pi;
+ struct sig_ctl *sctl;
+{
+ int signo;
+
+ for (signo = 0; signo < NSIG; signo++)
+ {
+ if (signal_stop_state (target_signal_from_host (signo)) == 0 &&
+ signal_print_state (target_signal_from_host (signo)) == 0 &&
+ signal_pass_state (target_signal_from_host (signo)) == 1)
+ {
+ prdelset (&sctl->sigset, signo);
}
else
{
- printf_unfiltered ("Ok, gdb will wait for %s to stop.\n", target_pid_to_str (pid));
+ praddset (&sctl->sigset, signo);
}
}
-
- /* 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 (pid);
- prfillset (&pi->prrun.pr_fault);
- prdelset (&pi->prrun.pr_fault, FLTPAGE);
- if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault))
- {
- print_sys_errmsg ("PIOCSFAULT failed", errno);
- }
- if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace))
+#ifdef PROCFS_USE_READ_WRITE
+ sctl->cmd = PCSTRACE;
+ if (write (pi->ctl_fd, (char *) sctl, sizeof (struct sig_ctl)) < 0)
+#else
+ if (ioctl (pi->ctl_fd, PIOCSTRACE, &sctl->sigset))
+#endif
{
print_sys_errmsg ("PIOCSTRACE failed", errno);
}
- attach_flag = 1;
- return (pid);
}
/*
LOCAL FUNCTION
- do_detach -- detach from an attached-to process
+ proc_set_exec_trap -- arrange for exec'd child to halt at startup
SYNOPSIS
- void do_detach (int signal)
+ void proc_set_exec_trap (void)
DESCRIPTION
- Detach from the current attachee.
-
- If signal is non-zero, the attachee is started running again and sent
- the specified signal.
+ 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.
- 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.
+NOTE
- 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 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.
- 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).
+ 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
-do_detach (signal)
- int signal;
+proc_set_exec_trap ()
{
- int result;
- struct procinfo *pi;
-
- pi = current_procinfo;
-
- if (signal)
- {
- set_proc_siginfo (pi, signal);
- }
- if (ioctl (pi->fd, PIOCSEXIT, &pi->saved_exitset) < 0)
- {
- print_sys_errmsg (pi->pathname, errno);
- printf_unfiltered ("PIOCSEXIT failed.\n");
- }
- if (ioctl (pi->fd, PIOCSENTRY, &pi->saved_entryset) < 0)
- {
- print_sys_errmsg (pi->pathname, errno);
- printf_unfiltered ("PIOCSENTRY failed.\n");
- }
- if (ioctl (pi->fd, PIOCSTRACE, &pi->saved_trace) < 0)
- {
- print_sys_errmsg (pi->pathname, errno);
- printf_unfiltered ("PIOCSTRACE failed.\n");
- }
- if (ioctl (pi->fd, PIOCSHOLD, &pi->saved_sighold) < 0)
- {
- print_sys_errmsg (pi->pathname, errno);
- printf_unfiltered ("PIOSCHOLD failed.\n");
- }
- if (ioctl (pi->fd, PIOCSFAULT, &pi->saved_fltset) < 0)
+ struct sys_ctl exitset;
+ struct sys_ctl entryset;
+ char procname[MAX_PROC_NAME_SIZE];
+ int fd;
+
+ sprintf (procname, CTL_PROC_NAME_FMT, getpid ());
+#ifdef UNIXWARE
+ if ((fd = open (procname, O_WRONLY)) < 0)
+#else
+ if ((fd = open (procname, O_RDWR)) < 0)
+#endif
{
- print_sys_errmsg (pi->pathname, errno);
- printf_unfiltered ("PIOCSFAULT failed.\n");
+ perror (procname);
+ gdb_flush (gdb_stderr);
+ _exit (127);
}
- if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
+ premptyset (&exitset.sysset);
+ premptyset (&entryset.sysset);
+
+#ifdef PRFS_STOPEXEC
+ /* Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
+ exits from exec system calls because of the user level loader. */
+ {
+ int prfs_flags;
+
+ if (ioctl (fd, PIOCGSPCACT, &prfs_flags) < 0)
+ {
+ perror (procname);
+ gdb_flush (gdb_stderr);
+ _exit (127);
+ }
+ prfs_flags |= PRFS_STOPEXEC;
+ if (ioctl (fd, PIOCSSPCACT, &prfs_flags) < 0)
+ {
+ perror (procname);
+ gdb_flush (gdb_stderr);
+ _exit (127);
+ }
+ }
+#else /* PRFS_STOPEXEC */
+ /* 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.sysset, SYS_exec);
+#endif
+#ifdef SYS_execve
+ praddset (&exitset.sysset, SYS_execve);
+#endif
+#ifdef SYS_execv
+ praddset (&exitset.sysset, SYS_execv);
+#endif
+
+#ifdef PROCFS_USE_READ_WRITE
+ exitset.cmd = PCSEXIT;
+ if (write (fd, (char *) &exitset, sizeof (struct sys_ctl)) < 0)
+#else
+ if (ioctl (fd, PIOCSEXIT, &exitset.sysset) < 0)
+#endif
{
- print_sys_errmsg (pi->pathname, errno);
- printf_unfiltered ("PIOCSTATUS failed.\n");
+ perror (procname);
+ gdb_flush (gdb_stderr);
+ _exit (127);
}
- 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_unfiltered ("PIOCCFAULT failed.\n");
- }
+#endif /* PRFS_STOPEXEC */
- /* 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);
- }
+ praddset (&entryset.sysset, SYS_exit);
+
+#ifdef PROCFS_USE_READ_WRITE
+ entryset.cmd = PCSENTRY;
+ if (write (fd, (char *) &entryset, sizeof (struct sys_ctl)) < 0)
#else
-#if defined (PIOCSRLC) /* Original method */
- result = ioctl (pi->fd, PIOCSRLC, 0);
+ if (ioctl (fd, PIOCSENTRY, &entryset.sysset) < 0)
#endif
-#endif
- if (result)
- {
- print_sys_errmsg (pi->pathname, errno);
- printf_unfiltered ("PIOCSRLC or PIOCSET failed.\n");
- }
- }
- }
+ {
+ perror (procname);
+ gdb_flush (gdb_stderr);
+ _exit (126);
}
- close_proc_file (pi);
- attach_flag = 0;
-}
-/* emulate wait() as much as possible.
- Wait for child to do something. Return pid of child, or -1 in case
- of error; store status in *OURSTATUS.
+ /* Turn off inherit-on-fork flag so that all grand-children of gdb
+ start with tracing flags cleared. */
- 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.
+ modify_inherit_on_fork_flag (fd, 0);
- 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.
+ /* Turn on run-on-last-close flag so that this process will not hang
+ if GDB goes away for some reason. */
- FIXME: Investigate why wait() seems to have problems with programs
- being control by /proc routines. */
+ modify_run_on_last_close_flag (fd, 1);
-static int
-procfs_wait (pid, ourstatus)
- int pid;
- struct target_waitstatus *ourstatus;
+#ifndef UNIXWARE /* since this is a solaris-ism, we don't want it */
+ /* NOTE: revisit when doing thread support for UW */
+#ifdef PR_ASYNC
+ {
+ long pr_flags;
+ struct proc_ctl pctl;
+
+/* Solaris needs this to make procfs treat all threads seperately. Without
+ this, all threads halt whenever something happens to any thread. Since
+ GDB wants to control all this itself, it needs to set PR_ASYNC. */
+
+ pr_flags = PR_ASYNC;
+#ifdef PROCFS_USE_READ_WRITE
+ pctl.cmd = PCSET;
+ pctl.data = PR_FORK|PR_ASYNC;
+ write (fd, (char *) &pctl, sizeof (struct proc_ctl));
+#else
+ ioctl (fd, PIOCSET, &pr_flags);
+#endif
+ }
+#endif /* PR_ASYNC */
+#endif /* !UNIXWARE */
+}
+
+/*
+
+GLOBAL FUNCTION
+
+ proc_iterate_over_mappings -- call function for every mapped space
+
+SYNOPSIS
+
+ int proc_iterate_over_mappings (int (*func)())
+
+DESCRIPTION
+
+ Given a pointer to a function, call that function for every
+ mapped address space, passing it an open file descriptor for
+ the file corresponding to that mapped address space (if any)
+ and the base address of the mapped space. Quit when we hit
+ the end of the mappings or the function returns nonzero.
+ */
+
+#ifdef UNIXWARE
+int
+proc_iterate_over_mappings (func)
+ int (*func) PARAMS ((int, CORE_ADDR));
{
- short what;
- short why;
- int statval = 0;
- int checkerr = 0;
- int rtnval = -1;
+ int nmap;
+ int fd;
+ int funcstat = 0;
+ prmap_t *prmaps;
+ prmap_t *prmap;
struct procinfo *pi;
+ struct stat sbuf;
- if (pid != -1) /* Non-specific process? */
- pi = NULL;
- else
- for (pi = procinfo_list; pi; pi = pi->next)
- if (pi->had_event)
- break;
+ pi = current_procinfo;
- if (!pi)
- {
- wait_again:
+ if (fstat (pi->map_fd, &sbuf) < 0)
+ return 0;
- pi = wait_fd ();
+ nmap = sbuf.st_size / sizeof (prmap_t);
+ prmaps = (prmap_t *) alloca (nmap * sizeof(prmap_t));
+ if ((lseek (pi->map_fd, 0, SEEK_SET) == 0) &&
+ (read (pi->map_fd, (char *) prmaps, nmap * sizeof (prmap_t)) ==
+ (nmap * sizeof (prmap_t))))
+ {
+ int i = 0;
+ for (prmap = prmaps; i < nmap && funcstat == 0; ++prmap, ++i)
+ {
+ char name[sizeof ("/proc/1234567890/object") +
+ sizeof (prmap->pr_mapname)];
+ sprintf (name, "/proc/%d/object/%s", pi->pid, prmap->pr_mapname);
+ if ((fd = open (name, O_RDONLY)) == -1)
+ {
+ funcstat = 1;
+ break;
+ }
+ funcstat = (*func) (fd, (CORE_ADDR) prmap->pr_vaddr);
+ close (fd);
+ }
}
+ return (funcstat);
+}
+#else /* UNIXWARE */
+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;
+ struct procinfo *pi;
- if (pid != -1)
- for (pi = procinfo_list; pi; pi = pi->next)
- if (pi->pid == pid && pi->had_event)
- break;
-
- if (!pi && !checkerr)
- goto wait_again;
+ pi = current_procinfo;
- if (!checkerr && !(pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
- {
- if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
- {
- checkerr++;
- }
- }
- if (checkerr)
+ if (ioctl (pi->map_fd, PIOCNMAP, &nmap) == 0)
{
- if (errno == ENOENT)
+ prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
+ if (ioctl (pi->map_fd, PIOCMAP, prmaps) == 0)
{
- rtnval = wait (&statval);
- if (rtnval != inferior_pid)
+ for (prmap = prmaps; prmap -> pr_size && funcstat == 0; ++prmap)
{
- print_sys_errmsg (pi->pathname, errno);
- error ("PIOCWSTOP, wait failed, returned %d", rtnval);
- /* NOTREACHED */
+ fd = proc_address_to_fd (pi, (CORE_ADDR) prmap -> pr_vaddr, 0);
+ funcstat = (*func) (fd, (CORE_ADDR) prmap -> pr_vaddr);
+ close (fd);
}
}
- 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;
-
- switch (why)
- {
- case PR_SIGNALLED:
- statval = (what << 8) | 0177;
- break;
- case PR_SYSENTRY:
- if (what != SYS_exit)
- error ("PR_SYSENTRY, unknown system call %d", what);
-
- pi->prrun.pr_flags = PRCFAULT;
-
- if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
- perror_with_name (pi->pathname);
-
- rtnval = wait (&statval);
-
- break;
- case PR_SYSEXIT:
- switch (what)
- {
-#ifdef SYS_exec
- case SYS_exec:
-#endif
-#ifdef SYS_execve
- case SYS_execve:
-#endif
-#ifdef SYS_execv
- case SYS_execv:
-#endif
- statval = (SIGTRAP << 8) | 0177;
- break;
-#ifdef SYS_sproc
- case SYS_sproc:
-/* We've just detected the completion of an sproc system call. Now we need to
- setup a procinfo struct for this thread, and notify the thread system of the
- new arrival. */
-
-/* If sproc failed, then nothing interesting happened. Continue the process and
- go back to sleep. */
+ return (funcstat);
+}
+#endif /* UNIXWARE */
- if (pi->prstatus.pr_errno != 0)
- {
- pi->prrun.pr_flags &= PRSTEP;
- pi->prrun.pr_flags |= PRCFAULT;
+#if 0 /* Currently unused */
+/*
- if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
- perror_with_name (pi->pathname);
+GLOBAL FUNCTION
- goto wait_again;
- }
+ proc_base_address -- find base address for segment containing address
-/* At this point, the new thread is stopped at it's first instruction, and
- the parent is stopped at the exit from sproc. */
+SYNOPSIS
-/* Notify the caller of the arrival of a new thread. */
- create_procinfo (pi->prstatus.pr_rval1);
+ CORE_ADDR proc_base_address (CORE_ADDR addr)
- rtnval = pi->prstatus.pr_rval1;
- statval = (SIGTRAP << 8) | 0177;
+DESCRIPTION
- break;
- case SYS_fork:
-#ifdef SYS_vfork
- case SYS_vfork:
-#endif
-/* At this point, we've detected the completion of a fork (or vfork) call in
- our child. The grandchild is also stopped because we set inherit-on-fork
- earlier. (Note that nobody has the grandchilds' /proc file open at this
- point.) We will release the grandchild from the debugger by opening it's
- /proc file and then closing it. Since run-on-last-close is set, the
- grandchild continues on its' merry way. */
+ Given an address of a location in the inferior, find and return
+ the base address of the mapped segment containing that address.
- {
- struct procinfo *pitemp;
+ 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.
+*/
- pitemp = create_procinfo (pi->prstatus.pr_rval1);
- if (pitemp)
- close_proc_file (pitemp);
+CORE_ADDR
+proc_base_address (addr)
+ CORE_ADDR addr;
+{
+ int nmap;
+ struct prmap *prmaps;
+ struct prmap *prmap;
+ CORE_ADDR baseaddr = 0;
+ struct procinfo *pi;
- if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
- perror_with_name (pi->pathname);
- }
- goto wait_again;
-#endif /* SYS_sproc */
+ pi = current_procinfo;
- default:
- error ("PIOCSTATUS (PR_SYSEXIT): Unknown system call %d", what);
- }
- break;
- case PR_REQUESTED:
- statval = (SIGSTOP << 8) | 0177;
- break;
- case PR_JOBCONTROL:
- statval = (what << 8) | 0177;
- break;
- case PR_FAULTED:
- switch (what)
+ if (ioctl (pi->map_fd, PIOCNMAP, &nmap) == 0)
+ {
+ prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
+ if (ioctl (pi->map_fd, PIOCMAP, prmaps) == 0)
+ {
+ for (prmap = prmaps; prmap -> pr_size; ++prmap)
{
-#ifdef FLTWATCH
- case FLTWATCH:
- statval = (SIGTRAP << 8) | 0177;
- break;
-#endif
-#ifdef FLTKWATCH
- case FLTKWATCH:
- statval = (SIGTRAP << 8) | 0177;
- break;
-#endif
-#ifndef FAULTED_USE_SIGINFO
- /* Irix, contrary to the documentation, fills in 0 for si_signo.
- Solaris fills in si_signo. I'm not sure about others. */
- 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 */
-#endif /* not FAULTED_USE_SIGINFO */
- default:
- /* Use the signal which the kernel assigns. This is better than
- trying to second-guess it from the fault. In fact, I suspect
- that FLTACCESS can be either SIGSEGV or SIGBUS. */
- statval = ((pi->prstatus.pr_info.si_signo) << 8) | 0177;
- break;
- }
- break;
- default:
- error ("PIOCWSTOP, unknown why %d, what %d", why, what);
- }
-/* Stop all the other threads when any of them stops. */
-
- {
- struct procinfo *procinfo;
-
- for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
- {
- if (!procinfo->had_event)
- if (ioctl (procinfo->fd, PIOCSTOP, &procinfo->prstatus) < 0)
+ if ((prmap -> pr_vaddr <= (caddr_t) addr) &&
+ (prmap -> pr_vaddr + prmap -> pr_size > (caddr_t) addr))
{
- print_sys_errmsg (procinfo->pathname, errno);
- error ("PIOCSTOP failed");
+ baseaddr = (CORE_ADDR) prmap -> pr_vaddr;
+ break;
}
- }
- }
- }
- else
- {
- error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
- pi->prstatus.pr_flags);
- }
-
- store_waitstatus (ourstatus, statval);
-
- if (rtnval == -1) /* No more children to wait for */
- {
- fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing.\n");
- /* Claim it exited with unknown signal. */
- ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
- ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
- return rtnval;
+ }
+ }
}
-
- pi->had_event = 0; /* Indicate that we've seen this one */
- return (rtnval);
+ return (baseaddr);
}
+#endif /* 0 */
+
+#ifndef UNIXWARE
/*
LOCAL FUNCTION
- set_proc_siginfo - set a process's current signal info
+ proc_address_to_fd -- return open fd for file mapped to address
SYNOPSIS
- void set_proc_siginfo (struct procinfo *pip, int signo);
+ int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
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.
+ 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).
- See siginfo(5) for more details.
*/
-static void
-set_proc_siginfo (pip, signo)
- struct procinfo *pip;
- int signo;
+static int
+proc_address_to_fd (pi, addr, complain)
+ struct procinfo *pi;
+ CORE_ADDR addr;
+ int complain;
{
- struct siginfo newsiginfo;
- struct siginfo *sip;
+ int fd = -1;
- 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)
+ if ((fd = ioctl (pi->ctl_fd, PIOCOPENM, (caddr_t *) &addr)) < 0)
{
- print_sys_errmsg (pip -> pathname, errno);
- warning ("PIOCSSIG failed");
+ if (complain)
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ warning ("can't find mapped file for address 0x%x", addr);
+ }
}
+ return (fd);
}
+#endif /* !UNIXWARE */
-/* Resume execution of process PID. If STEP is nozero, then
- just single step it. If SIGNAL is nonzero, restart it with that
- signal activated. */
+/* Attach to process PID, then initialize for debugging it
+ and wait for the trace-trap that results from attaching. */
static void
-procfs_resume (pid, step, signo)
- int pid;
- int step;
- enum target_signal signo;
+procfs_attach (args, from_tty)
+ char *args;
+ int from_tty;
{
- int signal_to_pass;
- struct procinfo *pi, *procinfo;
+ char *exec_file;
+ int pid;
- pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
+ if (!args)
+ error_no_arg ("process-id to attach");
- errno = 0;
- pi->prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT;
+ pid = atoi (args);
-#if 0
- /* It should not be necessary. If the user explicitly changes the value,
- value_assign calls write_register_bytes, which writes it. */
-/* It may not be absolutely necessary to specify the PC value for
- restarting, but to be safe we use the value that gdb considers
- to be current. One case where this might be necessary is if the
- user explicitly changes the PC value that gdb considers to be
- current. FIXME: Investigate if this is necessary or not. */
+ if (pid == getpid()) /* Trying to masturbate? */
+ error ("I refuse to debug myself!");
-#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. */
+ if (from_tty)
+ {
+ exec_file = (char *) get_exec_file (0);
- pi->prrun.pr_vaddr = (caddr_t) *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)];
- pi->prrun.pr_flags != PRSVADDR;
-#endif
-#endif
+ if (exec_file)
+ printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, target_pid_to_str (pid));
+ else
+ printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid));
- if (signo == TARGET_SIGNAL_STOP && pi->nopass_next_sigstop)
- /* When attaching to a child process, if we forced it to stop with
- a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
- Upon resuming the first time after such a stop, we explicitly
- inhibit sending it another SIGSTOP, which would be the normal
- result of default signal handling. One potential drawback to
- this is that we will also ignore any attempt to by the user
- to explicitly continue after the attach with a SIGSTOP. Ultimately
- this problem should be dealt with by making the routines that
- deal with the inferior a little smarter, and possibly even allow
- an inferior to continue running at the same time as gdb. (FIXME?) */
- signal_to_pass = 0;
- else if (signo == TARGET_SIGNAL_TSTP
- && pi->prstatus.pr_cursig == SIGTSTP
- && pi->prstatus.pr_action.sa_handler == SIG_DFL)
+ gdb_flush (gdb_stdout);
+ }
- /* We are about to pass the inferior a SIGTSTP whose action is
- SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
- (notifying the parent via wait()), and then keep going from the
- same place when the parent is ready for you to keep going. So
- under the debugger, it should do nothing (as if the program had
- been stopped and then later resumed. Under ptrace, this
- happens for us, but under /proc, the system obligingly stops
- the process, and wait_for_inferior would have no way of
- distinguishing that type of stop (which indicates that we
- should just start it again), with a stop due to the pr_trace
- field of the prrun_t struct.
+ inferior_pid = pid = do_attach (pid);
+ push_target (&procfs_ops);
+}
- Note that if the SIGTSTP is being caught, we *do* need to pass it,
- because the handler needs to get executed. */
- signal_to_pass = 0;
- else
- signal_to_pass = target_signal_to_host (signo);
- if (signal_to_pass)
- {
- set_proc_siginfo (pi, signal_to_pass);
- }
- else
- {
- pi->prrun.pr_flags |= PRCSIG;
- }
- pi->nopass_next_sigstop = 0;
- if (step)
- {
- pi->prrun.pr_flags |= PRSTEP;
- }
- if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
+/* 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)
{
- perror_with_name (pi->pathname);
- /* NOTREACHED */
+ char *exec_file = get_exec_file (0);
+ if (exec_file == 0)
+ exec_file = "";
+ printf_unfiltered ("Detaching from program: %s %s\n",
+ exec_file, target_pid_to_str (inferior_pid));
+ gdb_flush (gdb_stdout);
}
+ if (args)
+ siggnal = atoi (args);
+
+ do_detach (siggnal);
+ inferior_pid = 0;
+ unpush_target (&procfs_ops); /* Pop out of handling an inferior */
+}
- pi->had_event = 0;
+/* 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
+}
- /* Continue all the other threads that haven't had an event of
- interest. */
+/* Print status information about what we're accessing. */
- if (pid == -1)
- for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
- {
- if (pi != procinfo && !procinfo->had_event)
- {
- procinfo->prrun.pr_flags &= PRSTEP;
- procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG;
- ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus);
- if (ioctl (procinfo->fd, PIOCRUN, &procinfo->prrun) < 0)
- {
- if (ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus) < 0)
- {
- fprintf_unfiltered(gdb_stderr, "PIOCSTATUS failed, errno=%d\n", errno);
- }
- print_sys_errmsg (procinfo->pathname, errno);
- error ("PIOCRUN failed");
- }
- ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus);
- }
- }
+static void
+procfs_files_info (ignore)
+ struct target_ops *ignore;
+{
+ printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
+ attach_flag? "attached": "child", target_pid_to_str (inferior_pid));
+}
+
+/* ARGSUSED */
+static void
+procfs_open (arg, from_tty)
+ char *arg;
+ int from_tty;
+{
+ error ("Use the \"run\" command to start a Unix child process.");
}
/*
LOCAL FUNCTION
- procfs_fetch_registers -- fetch current registers from inferior
+ do_attach -- attach to an already existing process
SYNOPSIS
- void procfs_fetch_registers (int regno)
+ int do_attach (int pid)
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.
+ 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 void
-procfs_fetch_registers (regno)
- int regno;
+static int
+do_attach (pid)
+ int pid;
{
struct procinfo *pi;
+ struct sig_ctl sctl;
+ struct flt_ctl fctl;
+ int nlwp, *lwps;
- pi = current_procinfo;
+ pi = init_procinfo (pid, 0);
- if (ioctl (pi->fd, PIOCGREG, &pi->gregset) != -1)
- {
- supply_gregset (&pi->gregset);
- }
-#if defined (FP0_REGNUM)
- if (ioctl (pi->fd, PIOCGFPREG, &pi->fpregset) != -1)
+#ifdef PIOCLWPIDS
+ nlwp = pi->prstatus.pr_nlwp;
+ lwps = alloca ((2 * nlwp + 2) * sizeof (id_t));
+
+ if (ioctl (pi->ctl_fd, PIOCLWPIDS, lwps))
{
- supply_fpregset (&pi->fpregset);
+ print_sys_errmsg (pi -> pathname, errno);
+ error ("PIOCLWPIDS failed");
}
+#else /* PIOCLWPIDS */
+ nlwp = 1;
+ lwps = alloca ((2 * nlwp + 2) * sizeof *lwps);
+ lwps[0] = 0;
#endif
-}
-
-/*
-
-LOCAL FUNCTION
-
- proc_init_failed - called whenever /proc access initialization
-fails
+ for (; nlwp > 0; nlwp--, lwps++)
+ {
+ /* First one has already been created above. */
+ if ((pi = find_procinfo ((*lwps << 16) | pid, 1)) == 0)
+ pi = init_procinfo ((*lwps << 16) | pid, 0);
-SYNOPSIS
-
- static void proc_init_failed (struct procinfo *pi, 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.
- */
+#ifdef UNIXWARE
+ if (pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP))
+#else
+ if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
+#endif
+ {
+ pi->was_stopped = 1;
+ }
+ else
+ {
+ pi->was_stopped = 0;
+ if (1 || query ("Process is currently running, stop it? "))
+ {
+ long cmd;
+ /* Make it run again when we close it. */
+ modify_run_on_last_close_flag (pi->ctl_fd, 1);
+#ifdef PROCFS_USE_READ_WRITE
+ cmd = PCSTOP;
+ if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
+#else
+ if (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) < 0)
+#endif
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ close_proc_file (pi);
+ error ("PIOCSTOP failed");
+ }
+#ifdef UNIXWARE
+ if (!procfs_read_status (pi))
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ close_proc_file (pi);
+ error ("procfs_read_status failed");
+ }
+#endif
+ pi->nopass_next_sigstop = 1;
+ }
+ else
+ {
+ printf_unfiltered ("Ok, gdb will wait for %s to stop.\n",
+ target_pid_to_str (pi->pid));
+ }
+ }
-static void
-proc_init_failed (pi, why)
- struct procinfo *pi;
- char *why;
-{
- print_sys_errmsg (pi->pathname, errno);
- kill (pi->pid, SIGKILL);
- close_proc_file (pi);
- error (why);
- /* NOTREACHED */
+#ifdef PROCFS_USE_READ_WRITE
+ fctl.cmd = PCSFAULT;
+ if (write (pi->ctl_fd, (char *) &fctl, sizeof (struct flt_ctl)) < 0)
+ print_sys_errmsg ("PCSFAULT failed", errno);
+#else /* PROCFS_USE_READ_WRITE */
+ if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->prrun.pr_fault))
+ {
+ print_sys_errmsg ("PIOCSFAULT failed", errno);
+ }
+ if (ioctl (pi->ctl_fd, PIOCSTRACE, &pi->prrun.pr_trace))
+ {
+ print_sys_errmsg ("PIOCSTRACE failed", errno);
+ }
+ add_thread (pi->pid);
+ procfs_set_inferior_syscall_traps (pi);
+#endif /* PROCFS_USE_READ_WRITE */
+ }
+ attach_flag = 1;
+ return (pi->pid);
}
/*
LOCAL FUNCTION
- close_proc_file - close any currently open /proc entry
+ do_detach -- detach from an attached-to process
SYNOPSIS
- static void close_proc_file (struct procinfo *pip)
+ void do_detach (int signal)
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.
+ 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
-close_proc_file (pip)
- struct procinfo *pip;
+do_detach (signal)
+ int signal;
{
- struct procinfo *procinfo;
-
- remove_fd (pip); /* Remove fd from poll/select list */
-
- close (pip -> fd);
+ struct procinfo *pi;
- free (pip -> pathname);
+ for (pi = procinfo_list; pi; pi = pi->next)
+ {
+ if (signal)
+ {
+ set_proc_siginfo (pi, signal);
+ }
+#ifdef PROCFS_USE_READ_WRITE
+ pi->saved_exitset.cmd = PCSEXIT;
+ if (write (pi->ctl_fd, (char *) &pi->saved_exitset,
+ sizeof (struct sys_ctl)) < 0)
+#else
+ if (ioctl (pi->ctl_fd, PIOCSEXIT, &pi->saved_exitset.sysset) < 0)
+#endif
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCSEXIT failed.\n");
+ }
+#ifdef PROCFS_USE_READ_WRITE
+ pi->saved_entryset.cmd = PCSENTRY;
+ if (write (pi->ctl_fd, (char *) &pi->saved_entryset,
+ sizeof (struct sys_ctl)) < 0)
+#else
+ if (ioctl (pi->ctl_fd, PIOCSENTRY, &pi->saved_entryset.sysset) < 0)
+#endif
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCSENTRY failed.\n");
+ }
+#ifdef PROCFS_USE_READ_WRITE
+ pi->saved_trace.cmd = PCSTRACE;
+ if (write (pi->ctl_fd, (char *) &pi->saved_trace,
+ sizeof (struct sig_ctl)) < 0)
+#else
+ if (ioctl (pi->ctl_fd, PIOCSTRACE, &pi->saved_trace.sigset) < 0)
+#endif
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCSTRACE failed.\n");
+ }
+#ifndef UNIXWARE
+ if (ioctl (pi->ctl_fd, PIOCSHOLD, &pi->saved_sighold.sigset) < 0)
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOSCHOLD failed.\n");
+ }
+#endif
+#ifdef PROCFS_USE_READ_WRITE
+ pi->saved_fltset.cmd = PCSFAULT;
+ if (write (pi->ctl_fd, (char *) &pi->saved_fltset,
+ sizeof (struct flt_ctl)) < 0)
+#else
+ if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->saved_fltset.fltset) < 0)
+#endif
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCSFAULT failed.\n");
+ }
+ if (!procfs_read_status (pi))
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("procfs_read_status failed.\n");
+ }
+ else
+ {
+#ifdef UNIXWARE
+ if (signal || (pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP)))
+#else
+ if (signal || (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
+#endif
+ {
+ long cmd;
+ struct proc_ctl pctl;
- /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
+ if (signal || !pi->was_stopped ||
+ query ("Was stopped when attached, make it runnable again? "))
+ {
+ /* Clear any pending signal if we want to detach without
+ a signal. */
+ if (signal == 0)
+ set_proc_siginfo (pi, signal);
+
+ /* Clear any fault that might have stopped it. */
+#ifdef PROCFS_USE_READ_WRITE
+ cmd = PCCFAULT;
+ if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
+#else
+ if (ioctl (pi->ctl_fd, PIOCCFAULT, 0))
+#endif
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCCFAULT failed.\n");
+ }
- if (procinfo_list == pip)
- procinfo_list = pip->next;
- else
- for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
- if (procinfo->next == pip)
- procinfo->next = pip->next;
+ /* Make it run again when we close it. */
- free (pip);
+ modify_run_on_last_close_flag (pi->ctl_fd, 1);
+ }
+ }
+ }
+ close_proc_file (pi);
+ }
+ attach_flag = 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
+/* emulate wait() as much as possible.
+ Wait for child to do something. Return pid of child, or -1 in case
+ of error; store status in *OURSTATUS.
- 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.
+ 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.
- 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".
- */
+ 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
-open_proc_file (pid, pip, mode)
+procfs_wait (pid, ourstatus)
int pid;
- struct procinfo *pip;
- int mode;
+ struct target_waitstatus *ourstatus;
{
- pip -> next = NULL;
- pip -> had_event = 0;
- pip -> pathname = xmalloc (32);
- pip -> pid = pid;
+ short what;
+ short why;
+ int statval = 0;
+ int checkerr = 0;
+ int rtnval = -1;
+ struct procinfo *pi;
+ struct proc_ctl pctl;
- sprintf (pip -> pathname, PROC_NAME_FMT, pid);
- if ((pip -> fd = open (pip -> pathname, mode)) < 0)
- return 0;
+scan_again:
- return 1;
-}
+ /* handle all syscall events first, otherwise we might not
+ notice a thread was created until too late. */
-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);
-}
+ for (pi = procinfo_list; pi; pi = pi->next)
+ {
+ if (!pi->had_event)
+ continue;
-static void
-info_proc_flags (pip, summary)
- struct procinfo *pip;
- int summary;
-{
- struct trans *transp;
+#ifdef UNIXWARE
+ if (! (pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP)) )
+ continue;
- 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)
+ why = pi->prstatus.pr_lwp.pr_why;
+ what = pi->prstatus.pr_lwp.pr_what;
+#else
+ if (! (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)) )
+ continue;
+
+ why = pi->prstatus.pr_why;
+ what = pi->prstatus.pr_what;
+#endif
+ if (why == PR_SYSENTRY || why == PR_SYSEXIT)
{
- if (summary)
- {
- printf_filtered ("%s ", transp -> name);
- }
- else
+ int i;
+ int found_handler = 0;
+
+ for (i = 0; i < pi->num_syscall_handlers; i++)
+ if (pi->syscall_handlers[i].syscall_num == what)
+ {
+ found_handler = 1;
+ pi->saved_rtnval = pi->pid;
+ pi->saved_statval = 0;
+ if (!pi->syscall_handlers[i].func
+ (pi, what, why, &pi->saved_rtnval, &pi->saved_statval))
+ pi->had_event = 0;
+ break;
+ }
+
+ if (!found_handler)
{
- printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc);
+ if (why == PR_SYSENTRY)
+ error ("PR_SYSENTRY, unhandled system call %d", what);
+ else
+ error ("PR_SYSEXIT, unhandled system call %d", what);
}
}
}
- printf_filtered ("\n");
-}
-static void
-info_proc_stop (pip, summary)
- struct procinfo *pip;
- int summary;
-{
- struct trans *transp;
- int why;
- int what;
+ /* find a relevant process with an event */
- why = pip -> prstatus.pr_why;
- what = pip -> prstatus.pr_what;
+ for (pi = procinfo_list; pi; pi = pi->next)
+ if (pi->had_event && (pid == -1 || pi->pid == pid))
+ break;
- if (pip -> prstatus.pr_flags & PR_STOPPED)
+ if (!pi)
{
- printf_filtered ("%-32s", "Reason for stopping:");
- if (!summary)
+ wait_fd ();
+ goto scan_again;
+ }
+
+#ifdef UNIXWARE
+ if (!checkerr && !(pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP)))
+#else
+ if (!checkerr && !(pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
+#endif
+ {
+ if (!procfs_write_pcwstop (pi))
{
- printf_filtered ("\n\n");
+ checkerr++;
}
- for (transp = pr_why_table; transp -> name != NULL; transp++)
+ }
+ if (checkerr)
+ {
+ if (errno == ENOENT)
+ {
+ /* XXX Fixme -- what to do if attached? Can't call wait... */
+ rtnval = wait (&statval);
+ if ((rtnval) != (PIDGET (inferior_pid)))
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ error ("procfs_wait: wait failed, returned %d", rtnval);
+ /* NOTREACHED */
+ }
+ }
+ else
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ error ("PIOCSTATUS or PIOCWSTOP failed.");
+ /* NOTREACHED */
+ }
+ }
+#ifdef UNIXWARE
+ else if (pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP))
+#else
+ else if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
+#endif
+ {
+#ifdef UNIXWARE
+ rtnval = pi->prstatus.pr_pid;
+ why = pi->prstatus.pr_lwp.pr_why;
+ what = pi->prstatus.pr_lwp.pr_what;
+#else
+ rtnval = pi->pid;
+ why = pi->prstatus.pr_why;
+ what = pi->prstatus.pr_what;
+#endif
+
+ switch (why)
+ {
+ case PR_SIGNALLED:
+ statval = (what << 8) | 0177;
+ break;
+ case PR_SYSENTRY:
+ case PR_SYSEXIT:
+ rtnval = pi->saved_rtnval;
+ statval = pi->saved_statval;
+ break;
+ case PR_REQUESTED:
+ statval = (SIGSTOP << 8) | 0177;
+ break;
+ case PR_JOBCONTROL:
+ statval = (what << 8) | 0177;
+ break;
+ case PR_FAULTED:
+ switch (what)
+ {
+#ifdef FLTWATCH
+ case FLTWATCH:
+ statval = (SIGTRAP << 8) | 0177;
+ break;
+#endif
+#ifdef FLTKWATCH
+ case FLTKWATCH:
+ statval = (SIGTRAP << 8) | 0177;
+ break;
+#endif
+#ifndef FAULTED_USE_SIGINFO
+ /* Irix, contrary to the documentation, fills in 0 for si_signo.
+ Solaris fills in si_signo. I'm not sure about others. */
+ 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 */
+#endif /* not FAULTED_USE_SIGINFO */
+ default:
+ /* Use the signal which the kernel assigns. This is better than
+ trying to second-guess it from the fault. In fact, I suspect
+ that FLTACCESS can be either SIGSEGV or SIGBUS. */
+#ifdef UNIXWARE
+ statval = ((pi->prstatus.pr_lwp.pr_info.si_signo) << 8) | 0177;
+#else
+ statval = ((pi->prstatus.pr_info.si_signo) << 8) | 0177;
+#endif
+ break;
+ }
+ break;
+ default:
+ error ("PIOCWSTOP, unknown why %d, what %d", why, what);
+ }
+ /* Stop all the other threads when any of them stops. */
+
+ {
+ struct procinfo *procinfo, *next_pi;
+
+ for (procinfo = procinfo_list; procinfo; procinfo = next_pi)
+ {
+ next_pi = procinfo->next;
+ if (!procinfo->had_event)
+ {
+#ifdef PROCFS_USE_READ_WRITE
+ long cmd = PCSTOP;
+ if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
+ {
+ print_sys_errmsg (procinfo->pathname, errno);
+ error ("PCSTOP failed");
+ }
+#else
+ /* A bug in Solaris (2.5) causes us to hang when trying to
+ stop a stopped process. So, we have to check first in
+ order to avoid the hang. */
+ if (!procfs_read_status (procinfo))
+ {
+ /* The LWP has apparently terminated. */
+ if (info_verbose)
+ printf_filtered ("LWP %d doesn't respond.\n",
+ (procinfo->pid >> 16) & 0xffff);
+ close_proc_file (procinfo);
+ continue;
+ }
+
+ if (!(procinfo->prstatus.pr_flags & PR_STOPPED))
+ if (ioctl (procinfo->ctl_fd, PIOCSTOP, &procinfo->prstatus)
+ < 0)
+ {
+ print_sys_errmsg (procinfo->pathname, errno);
+ warning ("PIOCSTOP failed");
+ }
+#endif
+ }
+ }
+ }
+ }
+ else
+ {
+ error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
+#ifdef UNIXWARE
+ pi->prstatus.pr_lwp.pr_flags);
+#else
+ pi->prstatus.pr_flags);
+#endif
+ }
+
+ store_waitstatus (ourstatus, statval);
+
+ if (rtnval == -1) /* No more children to wait for */
+ {
+ warning ("Child process unexpectedly missing");
+ /* Claim it exited with unknown signal. */
+ ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
+ ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
+ return rtnval;
+ }
+
+ pi->had_event = 0; /* Indicate that we've seen this one */
+ 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;
+ struct sigi_ctl sictl;
+
+#ifdef PROCFS_DONT_PIOCSSIG_CURSIG
+ /* With Alpha OSF/1 procfs, the kernel gets really confused if it
+ receives a PIOCSSIG with a signal identical to the current signal,
+ it messes up the current signal. Work around the kernel bug. */
+#ifdef UNIXWARE
+ if (signo == pip -> prstatus.pr_lwp.pr_cursig)
+#else
+ if (signo == pip -> prstatus.pr_cursig)
+#endif
+ return;
+#endif
+
+#ifdef UNIXWARE
+ if (signo == pip->prstatus.pr_lwp.pr_info.si_signo)
+ {
+ memcpy ((char *) &sictl.siginfo, (char *) &pip->prstatus.pr_lwp.pr_info,
+ sizeof (siginfo_t));
+ }
+#else
+ if (signo == pip -> prstatus.pr_info.si_signo)
+ {
+ sip = &pip -> prstatus.pr_info;
+ }
+#endif
+ else
+ {
+#ifdef UNIXWARE
+ siginfo_t *sip = &sictl.siginfo;
+ memset ((char *) sip, 0, sizeof (siginfo_t));
+#else
+ memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
+ sip = &newsiginfo;
+#endif
+ sip -> si_signo = signo;
+ sip -> si_code = 0;
+ sip -> si_errno = 0;
+ sip -> si_pid = getpid ();
+ sip -> si_uid = getuid ();
+ }
+#ifdef PROCFS_USE_READ_WRITE
+ sictl.cmd = PCSSIG;
+ if (write (pip->ctl_fd, (char *) &sictl, sizeof (struct sigi_ctl)) < 0)
+#else
+ if (ioctl (pip->ctl_fd, PIOCSSIG, sip) < 0)
+#endif
+ {
+ print_sys_errmsg (pip -> pathname, errno);
+ warning ("PIOCSSIG failed");
+ }
+}
+
+/* Resume execution of process PID. If STEP is nozero, then
+ just single step it. If SIGNAL is nonzero, restart it with that
+ signal activated. */
+
+static void
+procfs_resume (pid, step, signo)
+ int pid;
+ int step;
+ enum target_signal signo;
+{
+ int signal_to_pass;
+ struct procinfo *pi, *procinfo, *next_pi;
+ struct proc_ctl pctl;
+
+ pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
+
+ errno = 0;
+#ifdef UNIXWARE
+ pctl.cmd = PCRUN;
+ pctl.data = PRCFAULT;
+#else
+ pi->prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT;
+#endif
+
+#if 0
+ /* It should not be necessary. If the user explicitly changes the value,
+ value_assign calls write_register_bytes, which writes it. */
+/* It may not be absolutely necessary to specify the PC value for
+ restarting, but to be safe we use the value that gdb considers
+ to be current. One case where this might be necessary is if the
+ user explicitly changes the PC value that gdb considers to be
+ current. FIXME: Investigate if this is necessary or not. */
+
+#ifdef PRSVADDR_BROKEN
+/* Can't do this under Solaris running on a Sparc, as there seems to be no
+ place to put nPC. In fact, if you use this, nPC seems to be set to some
+ random garbage. We have to rely on the fact that PC and nPC have been
+ written previously via PIOCSREG during a register flush. */
+
+ pi->prrun.pr_vaddr = (caddr_t) *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)];
+ pi->prrun.pr_flags != PRSVADDR;
+#endif
+#endif
+
+ if (signo == TARGET_SIGNAL_STOP && pi->nopass_next_sigstop)
+ /* When attaching to a child process, if we forced it to stop with
+ a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
+ Upon resuming the first time after such a stop, we explicitly
+ inhibit sending it another SIGSTOP, which would be the normal
+ result of default signal handling. One potential drawback to
+ this is that we will also ignore any attempt to by the user
+ to explicitly continue after the attach with a SIGSTOP. Ultimately
+ this problem should be dealt with by making the routines that
+ deal with the inferior a little smarter, and possibly even allow
+ an inferior to continue running at the same time as gdb. (FIXME?) */
+ signal_to_pass = 0;
+ else if (signo == TARGET_SIGNAL_TSTP
+#ifdef UNIXWARE
+ && pi->prstatus.pr_lwp.pr_cursig == SIGTSTP
+ && pi->prstatus.pr_lwp.pr_action.sa_handler == SIG_DFL
+#else
+ && pi->prstatus.pr_cursig == SIGTSTP
+ && pi->prstatus.pr_action.sa_handler == SIG_DFL
+#endif
+ )
+
+ /* We are about to pass the inferior a SIGTSTP whose action is
+ SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
+ (notifying the parent via wait()), and then keep going from the
+ same place when the parent is ready for you to keep going. So
+ under the debugger, it should do nothing (as if the program had
+ been stopped and then later resumed. Under ptrace, this
+ happens for us, but under /proc, the system obligingly stops
+ the process, and wait_for_inferior would have no way of
+ distinguishing that type of stop (which indicates that we
+ should just start it again), with a stop due to the pr_trace
+ field of the prrun_t struct.
+
+ Note that if the SIGTSTP is being caught, we *do* need to pass it,
+ because the handler needs to get executed. */
+ signal_to_pass = 0;
+ else
+ signal_to_pass = target_signal_to_host (signo);
+
+ if (signal_to_pass)
+ {
+ set_proc_siginfo (pi, signal_to_pass);
+ }
+ else
+ {
+#ifdef UNIXWARE
+ pctl.data |= PRCSIG;
+#else
+ pi->prrun.pr_flags |= PRCSIG;
+#endif
+ }
+ pi->nopass_next_sigstop = 0;
+ if (step)
+ {
+#ifdef UNIXWARE
+ pctl.data |= PRSTEP;
+#else
+ pi->prrun.pr_flags |= PRSTEP;
+#endif
+ }
+ pi->had_event = 0;
+ /* Don't try to start a process unless it's stopped on an
+ `event of interest'. Doing so will cause errors. */
+
+ if (!procfs_read_status (pi))
+ {
+ /* The LWP has apparently terminated. */
+ if (info_verbose)
+ printf_filtered ("LWP %d doesn't respond.\n",
+ (pi->pid >> 16) & 0xffff);
+ close_proc_file (pi);
+ }
+ else
+ {
+#ifdef PROCFS_USE_READ_WRITE
+ if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
+#else
+ if ((pi->prstatus.pr_flags & PR_ISTOP)
+ && ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
+#endif
+ {
+ /* The LWP has apparently terminated. */
+ if (info_verbose)
+ printf_filtered ("LWP %d doesn't respond.\n",
+ (pi->pid >> 16) & 0xffff);
+ close_proc_file (pi);
+ }
+ }
+
+ /* Continue all the other threads that haven't had an event of interest.
+ Also continue them if they have NOPASS_NEXT_SIGSTOP set; this is only
+ set by do_attach, and means this is the first resume after an attach.
+ All threads were CSTOP'd by do_attach, and should be resumed now. */
+
+ if (pid == -1)
+ for (procinfo = procinfo_list; procinfo; procinfo = next_pi)
+ {
+ next_pi = procinfo->next;
+ if (pi != procinfo)
+ if (!procinfo->had_event ||
+ (procinfo->nopass_next_sigstop && signo == TARGET_SIGNAL_STOP))
+ {
+ procinfo->had_event = procinfo->nopass_next_sigstop = 0;
+#ifdef PROCFS_USE_READ_WRITE
+ pctl.data = PRCFAULT | PRCSIG;
+ if (write (procinfo->ctl_fd, (char *) &pctl,
+ sizeof (struct proc_ctl)) < 0)
+ {
+ if (!procfs_read_status (procinfo))
+ fprintf_unfiltered(gdb_stderr,
+ "procfs_read_status failed, errno=%d\n",
+ errno);
+ print_sys_errmsg (procinfo->pathname, errno);
+ error ("PCRUN failed");
+ }
+#else
+ procinfo->prrun.pr_flags &= PRSTEP;
+ procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG;
+ if (!procfs_read_status (procinfo))
+ {
+ /* The LWP has apparently terminated. */
+ if (info_verbose)
+ printf_filtered ("LWP %d doesn't respond.\n",
+ (procinfo->pid >> 16) & 0xffff);
+ close_proc_file (procinfo);
+ continue;
+ }
+
+ /* Don't try to start a process unless it's stopped on an
+ `event of interest'. Doing so will cause errors. */
+
+ if ((procinfo->prstatus.pr_flags & PR_ISTOP)
+ && ioctl (procinfo->ctl_fd, PIOCRUN, &procinfo->prrun) < 0)
+ {
+ if (!procfs_read_status (procinfo))
+ fprintf_unfiltered(gdb_stderr,
+ "procfs_read_status failed, errno=%d\n",
+ errno);
+ print_sys_errmsg (procinfo->pathname, errno);
+ warning ("PIOCRUN failed");
+ }
+#endif
+ }
+ procfs_read_status (procinfo);
+ }
+}
+
+/*
+
+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;
+{
+ struct procinfo *pi;
+
+ pi = current_procinfo;
+
+#ifdef UNIXWARE
+ if (procfs_read_status (pi))
+ {
+ supply_gregset (&pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs);
+#if defined (FP0_REGNUM)
+ supply_fpregset (&pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs);
+#endif
+ }
+#else /* UNIXWARE */
+ if (ioctl (pi->ctl_fd, PIOCGREG, &pi->gregset.gregset) != -1)
+ {
+ supply_gregset (&pi->gregset.gregset);
+ }
+#if defined (FP0_REGNUM)
+ if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset.fpregset) != -1)
+ {
+ supply_fpregset (&pi->fpregset.fpregset);
+ }
+#endif
+#endif /* UNIXWARE */
+}
+
+/*
+
+LOCAL FUNCTION
+
+ proc_init_failed - called when /proc access initialization fails
+fails
+
+SYNOPSIS
+
+ static void proc_init_failed (struct procinfo *pi,
+ char *why, int kill_p)
+
+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. If KILL_P is true, sends SIGKILL.
+ */
+
+static void
+proc_init_failed (pi, why, kill_p)
+ struct procinfo *pi;
+ char *why;
+ int kill_p;
+{
+ print_sys_errmsg (pi->pathname, errno);
+ if (kill_p)
+ 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;
+{
+ struct procinfo *procinfo;
+
+ delete_thread (pip->pid); /* remove thread from GDB's thread list */
+ remove_fd (pip); /* Remove fd from poll/select list */
+
+ close (pip->ctl_fd);
+#ifdef HAVE_MULTIPLE_PROC_FDS
+ close (pip->as_fd);
+ close (pip->status_fd);
+ close (pip->map_fd);
+#endif
+
+ free (pip -> pathname);
+
+ /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
+
+ if (procinfo_list == pip)
+ procinfo_list = pip->next;
+ else
+ {
+ for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
+ {
+ if (procinfo->next == pip)
+ {
+ procinfo->next = pip->next;
+ break;
+ }
+ }
+ free (pip);
+ }
+}
+
+/*
+
+LOCAL FUNCTION
+
+ open_proc_file - open a /proc entry for a given process id
+
+SYNOPSIS
+
+ static int open_proc_file (int pid, struct procinfo *pip, int mode)
+
+DESCRIPTION
+
+ Given a process id and a mode, close the existing open /proc
+ entry (if any) and open one for the new process id, in the
+ specified mode. Once it is open, then mark the local process
+ information structure as valid, which guarantees that the pid,
+ fd, and pathname fields match an open /proc entry. Returns
+ zero if the open fails, nonzero otherwise.
+
+ Note that the pathname is left intact, even when the open fails,
+ so that callers can use it to construct meaningful error messages
+ rather than just "file open failed".
+
+ Note that for Solaris, the process-id also includes an LWP-id, so we
+ actually attempt to open that. If we are handed a pid with a 0 LWP-id,
+ then we will ask the kernel what it is and add it to the pid. Hence,
+ the pid can be changed by us.
+ */
+
+static int
+open_proc_file (pid, pip, mode, control)
+ int pid;
+ struct procinfo *pip;
+ int mode;
+ int control;
+{
+ int tmp, tmpfd;
+
+ pip -> next = NULL;
+ pip -> had_event = 0;
+ pip -> pathname = xmalloc (MAX_PROC_NAME_SIZE);
+ pip -> pid = pid;
+
+#ifndef PIOCOPENLWP
+ tmp = pid;
+#else
+ tmp = pid & 0xffff;
+#endif
+
+#ifdef HAVE_MULTIPLE_PROC_FDS
+ sprintf (pip->pathname, STATUS_PROC_NAME_FMT, tmp);
+ if ((pip->status_fd = open (pip->pathname, O_RDONLY)) < 0)
+ {
+ return 0;
+ }
+
+ sprintf (pip->pathname, AS_PROC_NAME_FMT, tmp);
+ if ((pip->as_fd = open (pip->pathname, O_RDWR)) < 0)
+ {
+ close (pip->status_fd);
+ return 0;
+ }
+
+ sprintf (pip->pathname, MAP_PROC_NAME_FMT, tmp);
+ if ((pip->map_fd = open (pip->pathname, O_RDONLY)) < 0)
+ {
+ close (pip->status_fd);
+ close (pip->as_fd);
+ return 0;
+ }
+
+ sprintf (pip->pathname, MAP_PROC_NAME_FMT, tmp);
+ if ((pip->map_fd = open (pip->pathname, O_RDONLY)) < 0)
+ {
+ close (pip->status_fd);
+ close (pip->as_fd);
+ return 0;
+ }
+
+ if (control)
+ {
+ sprintf (pip->pathname, CTL_PROC_NAME_FMT, tmp);
+ if ((pip->ctl_fd = open (pip->pathname, O_WRONLY)) < 0)
+ {
+ close (pip->status_fd);
+ close (pip->as_fd);
+ close (pip->map_fd);
+ return 0;
+ }
+ }
+
+#else /* HAVE_MULTIPLE_PROC_FDS */
+ sprintf (pip -> pathname, CTL_PROC_NAME_FMT, tmp);
+
+ if ((tmpfd = open (pip -> pathname, mode)) < 0)
+ return 0;
+
+#ifndef PIOCOPENLWP
+ pip -> ctl_fd = tmpfd;
+ pip -> as_fd = tmpfd;
+ pip -> map_fd = tmpfd;
+ pip -> status_fd = tmpfd;
+#else
+ tmp = (pid >> 16) & 0xffff; /* Extract thread id */
+
+ if (tmp == 0)
+ { /* Don't know thread id yet */
+ if (ioctl (tmpfd, PIOCSTATUS, &pip -> prstatus) < 0)
+ {
+ print_sys_errmsg (pip -> pathname, errno);
+ close (tmpfd);
+ error ("open_proc_file: PIOCSTATUS failed");
+ }
+
+ tmp = pip -> prstatus.pr_who; /* Get thread id from prstatus_t */
+ pip -> pid = (tmp << 16) | pid; /* Update pip */
+ }
+
+ if ((pip -> ctl_fd = ioctl (tmpfd, PIOCOPENLWP, &tmp)) < 0)
+ {
+ close (tmpfd);
+ return 0;
+ }
+
+#ifdef PIOCSET /* New method */
+ {
+ long pr_flags;
+ pr_flags = PR_ASYNC;
+ ioctl (pip -> ctl_fd, PIOCSET, &pr_flags);
+ }
+#endif
+
+ /* keep extra fds in sync */
+ pip->as_fd = pip->ctl_fd;
+ pip->map_fd = pip->ctl_fd;
+ pip->status_fd = pip->ctl_fd;
+
+ close (tmpfd); /* All done with main pid */
+#endif /* PIOCOPENLWP */
+
+#endif /* HAVE_MULTIPLE_PROC_FDS */
+
+ return 1;
+}
+
+static char *
+mappingflags (flags)
+ long flags;
+{
+ static char asciiflags[8];
+
+ strcpy (asciiflags, "-------");
+#if defined (MA_PHYS)
+ if (flags & MA_PHYS) asciiflags[0] = 'd';
+#endif
+ if (flags & MA_STACK) asciiflags[1] = 's';
+ if (flags & MA_BREAK) asciiflags[2] = 'b';
+ if (flags & MA_SHARED) asciiflags[3] = 's';
+ if (flags & MA_READ) asciiflags[4] = 'r';
+ if (flags & MA_WRITE) asciiflags[5] = 'w';
+ if (flags & MA_EXEC) asciiflags[6] = 'x';
+ return (asciiflags);
+}
+
+static void
+info_proc_flags (pip, summary)
+ struct procinfo *pip;
+ int summary;
+{
+ struct trans *transp;
+#ifdef UNIXWARE
+ long flags = pip->prstatus.pr_flags | pip->prstatus.pr_lwp.pr_flags;
+#else
+ long flags = pip->prstatus.pr_flags;
+#endif
+
+ printf_filtered ("%-32s", "Process status flags:");
+ if (!summary)
+ {
+ printf_filtered ("\n\n");
+ }
+ for (transp = pr_flag_table; transp -> name != NULL; transp++)
+ {
+ if (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;
+
+#ifdef UNIXWARE
+ why = pip -> prstatus.pr_lwp.pr_why;
+ what = pip -> prstatus.pr_lwp.pr_what;
+#else
+ why = pip -> prstatus.pr_why;
+ what = pip -> prstatus.pr_what;
+#endif
+
+#ifdef UNIXWARE
+ if (pip -> prstatus.pr_lwp.pr_flags & PR_STOPPED)
+#else
+ if (pip -> prstatus.pr_flags & PR_STOPPED)
+#endif
+ {
+ 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)
+ 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;
+
+#ifdef UNIXWARE
+ if ((pip -> prstatus.pr_lwp.pr_flags & PR_STOPPED) &&
+ (pip -> prstatus.pr_lwp.pr_why == PR_SIGNALLED ||
+ pip -> prstatus.pr_lwp.pr_why == PR_FAULTED))
+#else
+ if ((pip -> prstatus.pr_flags & PR_STOPPED) &&
+ (pip -> prstatus.pr_why == PR_SIGNALLED ||
+ pip -> prstatus.pr_why == PR_FAULTED))
+#endif
+ {
+ printf_filtered ("%-32s", "Additional signal/fault info:");
+#ifdef UNIXWARE
+ sip = &pip -> prstatus.pr_lwp.pr_info;
+#else
+ sip = &pip -> prstatus.pr_info;
+#endif
+ if (summary)
+ {
+ printf_filtered ("%s ", signalname (sip -> si_signo));
+ if (sip -> si_errno > 0)
+ {
+ printf_filtered ("%s ", errnoname (sip -> si_errno));
+ }
+ if (sip -> si_code <= 0)
+ {
+ printf_filtered ("sent by %s, uid %d ",
+ target_pid_to_str (sip -> si_pid),
+ sip -> si_uid);
+ }
+ else
+ {
+ printf_filtered ("%s ", sigcodename (sip));
+ if ((sip -> si_signo == SIGILL) ||
+ (sip -> si_signo == SIGFPE) ||
+ (sip -> si_signo == SIGSEGV) ||
+ (sip -> si_signo == SIGBUS))
+ {
+ printf_filtered ("addr=%#lx ",
+ (unsigned long) sip -> si_addr);
+ }
+ else if ((sip -> si_signo == SIGCHLD))
+ {
+ printf_filtered ("child %s, status %u ",
+ target_pid_to_str (sip -> si_pid),
+ sip -> si_status);
+ }
+ else if ((sip -> si_signo == SIGPOLL))
+ {
+ printf_filtered ("band %u ", sip -> si_band);
+ }
+ }
+ }
+ else
+ {
+ printf_filtered ("\n\n");
+ printf_filtered ("\t%-16s %s.\n", signalname (sip -> si_signo),
+ safe_strsignal (sip -> si_signo));
+ if (sip -> si_errno > 0)
+ {
+ printf_filtered ("\t%-16s %s.\n",
+ errnoname (sip -> si_errno),
+ safe_strerror (sip -> si_errno));
+ }
+ if (sip -> si_code <= 0)
+ {
+ printf_filtered ("\t%-16u %s\n", sip -> si_pid, /* XXX need target_pid_to_str() */
+ "PID of process sending signal");
+ printf_filtered ("\t%-16u %s\n", sip -> si_uid,
+ "UID of process sending signal");
+ }
+ else
+ {
+ printf_filtered ("\t%-16s %s.\n", sigcodename (sip),
+ sigcodedesc (sip));
+ if ((sip -> si_signo == SIGILL) ||
+ (sip -> si_signo == SIGFPE))
{
- printf_filtered ("%s ", transp -> name);
+ printf_filtered ("\t%#-16lx %s.\n",
+ (unsigned long) sip -> si_addr,
+ "Address of faulting instruction");
}
- else
+ else if ((sip -> si_signo == SIGSEGV) ||
+ (sip -> si_signo == SIGBUS))
+ {
+ printf_filtered ("\t%#-16lx %s.\n",
+ (unsigned long) sip -> si_addr,
+ "Address of faulting memory reference");
+ }
+ else if ((sip -> si_signo == SIGCHLD))
+ {
+ printf_filtered ("\t%-16u %s.\n", sip -> si_pid, /* XXX need target_pid_to_str() */
+ "Child process ID");
+ printf_filtered ("\t%-16u %s.\n", sip -> si_status,
+ "Child process exit value or signal");
+ }
+ else if ((sip -> si_signo == SIGPOLL))
+ {
+ printf_filtered ("\t%-16u %s.\n", sip -> si_band,
+ "Band event for POLL_{IN,OUT,MSG}");
+ }
+ }
+ }
+ printf_filtered ("\n");
+ }
+}
+
+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
+
+#ifndef UNIXWARE
+ if (ioctl (pip -> ctl_fd, PIOCGENTRY, &pip -> entryset) < 0)
+ {
+ print_sys_errmsg (pip -> pathname, errno);
+ error ("PIOCGENTRY failed");
+ }
+
+ if (ioctl (pip -> ctl_fd, PIOCGEXIT, &pip -> exitset) < 0)
+ {
+ print_sys_errmsg (pip -> pathname, errno);
+ error ("PIOCGEXIT failed");
+ }
+#endif
+
+ 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]);
+ else
+ printf_filtered ("\t%-12d ", syscallnum);
+
+#ifdef UNIXWARE
+ printf_filtered ("%-8s ",
+ prismember (&pip->prstatus.pr_sysentry, syscallnum)
+ ? "on" : "off");
+ printf_filtered ("%-8s ",
+ prismember (&pip->prstatus.pr_sysexit, syscallnum)
+ ? "on" : "off");
+#else
+ printf_filtered ("%-8s ",
+ prismember (&pip -> entryset, syscallnum)
+ ? "on" : "off");
+ printf_filtered ("%-8s ",
+ prismember (&pip -> exitset, syscallnum)
+ ? "on" : "off");
+#endif
+ printf_filtered ("\n");
+ }
+ printf_filtered ("\n");
+ }
+}
+
+static char *
+signalname (signo)
+ int signo;
+{
+ const 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;
+{
+ const 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)
+ {
+#ifndef PROCFS_USE_READ_WRITE
+ if (ioctl (pip -> ctl_fd, PIOCGTRACE, &pip -> trace) < 0)
+ {
+ print_sys_errmsg (pip -> pathname, errno);
+ error ("PIOCGTRACE failed");
+ }
+#endif
+
+ 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));
+#ifdef UNIXWARE
+ printf_filtered ("%-8s ",
+ prismember (&pip -> prstatus.pr_sigtrace, signo)
+ ? "on" : "off");
+ printf_filtered ("%-8s ",
+ prismember (&pip -> prstatus.pr_lwp.pr_context.uc_sigmask, signo)
+ ? "on" : "off");
+#else
+ printf_filtered ("%-8s ",
+ prismember (&pip -> trace, signo)
+ ? "on" : "off");
+ printf_filtered ("%-8s ",
+ prismember (&pip -> prstatus.pr_sighold, signo)
+ ? "on" : "off");
+#endif
+
+#ifdef UNIXWARE
+ if (prismember (&pip->prstatus.pr_sigpend, signo) ||
+ prismember (&pip->prstatus.pr_lwp.pr_lwppend, signo))
+ printf_filtered("%-8s ", "yes");
+ else
+ printf_filtered("%-8s ", "no");
+#else /* UNIXWARE */
+#ifdef PROCFS_SIGPEND_OFFSET
+ /* Alpha OSF/1 numbers the pending signals from 1. */
+ printf_filtered ("%-8s ",
+ (signo ? prismember (&pip -> prstatus.pr_sigpend,
+ signo - 1)
+ : 0)
+ ? "yes" : "no");
+#else
+ printf_filtered ("%-8s ",
+ prismember (&pip -> prstatus.pr_sigpend, signo)
+ ? "yes" : "no");
+#endif
+#endif /* UNIXWARE */
+ 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)
+ {
+#ifndef UNIXWARE
+ if (ioctl (pip -> ctl_fd, PIOCGFAULT, &pip->fltset.fltset) < 0)
+ {
+ print_sys_errmsg (pip -> pathname, errno);
+ error ("PIOCGFAULT failed");
+ }
+#endif
+
+ 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);
+#ifdef UNIXWARE
+ printf_filtered ("%-8s", prismember (&pip->prstatus.pr_flttrace, transp -> value)
+ ? "on" : "off");
+#else
+ printf_filtered ("%-8s", prismember (&pip->fltset.fltset, transp -> value)
+ ? "on" : "off");
+#endif
+ 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;
+ struct stat sbuf;
+
+ if (!summary)
+ {
+ printf_filtered ("Mapped address spaces:\n\n");
+#ifdef BFD_HOST_64_BIT
+ printf_filtered (" %18s %18s %10s %10s %7s\n",
+#else
+ printf_filtered ("\t%10s %10s %10s %10s %7s\n",
+#endif
+ "Start Addr",
+ " End Addr",
+ " Size",
+ " Offset",
+ "Flags");
+#ifdef PROCFS_USE_READ_WRITE
+ if (fstat (pip->map_fd, &sbuf) == 0)
+ {
+ nmap = sbuf.st_size / sizeof (prmap_t);
+ prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
+ if ((lseek (pip->map_fd, 0, SEEK_SET) == 0) &&
+ (read (pip->map_fd, (char *) prmaps,
+ nmap * sizeof (*prmaps)) == (nmap * sizeof (*prmaps))))
+ {
+ int i = 0;
+ for (prmap = prmaps; i < nmap; ++prmap, ++i)
+#else
+ if (ioctl (pip -> ctl_fd, PIOCNMAP, &nmap) == 0)
+ {
+ prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
+ if (ioctl (pip -> ctl_fd, PIOCMAP, prmaps) == 0)
+ {
+ for (prmap = prmaps; prmap -> pr_size; ++prmap)
+#endif /* PROCFS_USE_READ_WRITE */
{
- printf_filtered ("\t%-16s %s.\n",
- transp -> name, transp -> desc);
+#ifdef BFD_HOST_64_BIT
+ printf_filtered (" %#18lx %#18lx %#10x %#10x %7s\n",
+#else
+ printf_filtered ("\t%#10lx %#10lx %#10x %#10x %7s\n",
+#endif
+ (unsigned long)prmap -> pr_vaddr,
+ (unsigned long)prmap -> pr_vaddr
+ + prmap -> pr_size - 1,
+ prmap -> pr_size,
+ prmap -> pr_off,
+ mappingflags (prmap -> pr_mflags));
}
- 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");
}
}
+/*
+
+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_siginfo (pip, summary)
- struct procinfo *pip;
- int summary;
+info_proc (args, from_tty)
+ char *args;
+ int from_tty;
{
- struct siginfo *sip;
+ int pid;
+ 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;
+ int nlwp;
+ int *lwps;
- if ((pip -> prstatus.pr_flags & PR_STOPPED) &&
- (pip -> prstatus.pr_why == PR_SIGNALLED ||
- pip -> prstatus.pr_why == PR_FAULTED))
+ old_chain = make_cleanup (null_cleanup, 0);
+
+ /* Default to using the current inferior if no pid specified. Note
+ that inferior_pid may be 0, hence we set okerr. */
+
+ pid = inferior_pid & 0x7fffffff; /* strip off sol-thread bit */
+ if (!(pip = find_procinfo (pid, 1))) /* inferior_pid no good? */
+ pip = procinfo_list; /* take first available */
+ pid = pid & 0xffff; /* extract "real" pid */
+
+ if (args != NULL)
{
- printf_filtered ("%-32s", "Additional signal/fault info:");
- sip = &pip -> prstatus.pr_info;
- if (summary)
+ if ((argv = buildargv (args)) == NULL)
{
- printf_filtered ("%s ", signalname (sip -> si_signo));
- if (sip -> si_errno > 0)
+ nomem (0);
+ }
+ make_cleanup (freeargv, (char *) argv);
+
+ while (*argv != NULL)
+ {
+ argsize = strlen (*argv);
+ if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0)
{
- printf_filtered ("%s ", errnoname (sip -> si_errno));
+ summary = 0;
+ all = 1;
}
- if (sip -> si_code <= 0)
+ else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0)
{
- printf_filtered ("sent by %s, uid %d ",
- target_pid_to_str (sip -> si_pid),
- sip -> si_uid);
+ summary = 0;
+ faults = 1;
}
- else
+ else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0)
{
- printf_filtered ("%s ", sigcodename (sip));
- if ((sip -> si_signo == SIGILL) ||
- (sip -> si_signo == SIGFPE) ||
- (sip -> si_signo == SIGSEGV) ||
- (sip -> si_signo == SIGBUS))
- {
- printf_filtered ("addr=%#x ", sip -> si_addr);
- }
- else if ((sip -> si_signo == SIGCHLD))
- {
- printf_filtered ("child %s, status %u ",
- target_pid_to_str (sip -> si_pid),
- sip -> si_status);
- }
- else if ((sip -> si_signo == SIGPOLL))
- {
- printf_filtered ("band %u ", sip -> si_band);
- }
+ summary = 0;
+ flags = 1;
}
- }
- 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)
+ else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0)
{
- printf_filtered ("\t%-16s %s.\n",
- errnoname (sip -> si_errno),
- safe_strerror (sip -> si_errno));
+ summary = 0;
+ id = 1;
}
- if (sip -> si_code <= 0)
+ else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0)
{
- printf_filtered ("\t%-16u %s\n", sip -> si_pid, /* XXX need target_pid_to_str() */
- "PID of process sending signal");
- printf_filtered ("\t%-16u %s\n", sip -> si_uid,
- "UID of process sending signal");
+ summary = 0;
+ mappings = 1;
}
- else
+ else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0)
{
- printf_filtered ("\t%-16s %s.\n", sigcodename (sip),
- sigcodedesc (sip));
- if ((sip -> si_signo == SIGILL) ||
- (sip -> si_signo == SIGFPE))
- {
- printf_filtered ("\t%-16#x %s.\n", sip -> si_addr,
- "Address of faulting instruction");
- }
- else if ((sip -> si_signo == SIGSEGV) ||
- (sip -> si_signo == SIGBUS))
- {
- printf_filtered ("\t%-16#x %s.\n", sip -> si_addr,
- "Address of faulting memory reference");
- }
- else if ((sip -> si_signo == SIGCHLD))
- {
- printf_filtered ("\t%-16u %s.\n", sip -> si_pid, /* XXX need target_pid_to_str() */
- "Child process ID");
- printf_filtered ("\t%-16u %s.\n", sip -> si_status,
- "Child process exit value or signal");
- }
- else if ((sip -> si_signo == SIGPOLL))
+ 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 ((pid = atoi (*argv)) > 0)
+ {
+ pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
+ memset (pip, 0, sizeof (*pip));
+
+ pip->pid = pid;
+ if (!open_proc_file (pid, pip, O_RDONLY, 0))
{
- printf_filtered ("\t%-16u %s.\n", sip -> si_band,
- "Band event for POLL_{IN,OUT,MSG}");
+ perror_with_name (pip -> pathname);
+ /* NOTREACHED */
}
+ pid = pip->pid;
+ make_cleanup (close_proc_file, pip);
+ }
+ else if (**argv != '\000')
+ {
+ error ("Unrecognized or ambiguous keyword `%s'.", *argv);
}
+ argv++;
}
- printf_filtered ("\n");
}
-}
-static void
-info_proc_syscalls (pip, summary)
- struct procinfo *pip;
- int summary;
-{
- int syscallnum;
+ /* 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)
+ {
+ error ("\
+No process. Start debugging a program or specify an explicit process ID.");
+ }
+
+ if (!procfs_read_status (pip))
+ {
+ print_sys_errmsg (pip -> pathname, errno);
+ error ("procfs_read_status failed");
+ }
- if (!summary)
+#ifndef PROCFS_USE_READ_WRITE
+#ifdef PIOCLWPIDS
+ nlwp = pip->prstatus.pr_nlwp;
+ lwps = alloca ((2 * nlwp + 2) * sizeof (*lwps));
+
+ if (ioctl (pip->ctl_fd, PIOCLWPIDS, lwps))
{
+ print_sys_errmsg (pip -> pathname, errno);
+ error ("PIOCLWPIDS failed");
+ }
+#else /* PIOCLWPIDS */
+ nlwp = 1;
+ lwps = alloca ((2 * nlwp + 2) * sizeof *lwps);
+ lwps[0] = 0;
+#endif /* PIOCLWPIDS */
-#if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
- if (pip -> prstatus.pr_flags & PR_ASLEEP)
+ for (; nlwp > 0; nlwp--, lwps++)
+ {
+ pip = find_procinfo ((*lwps << 16) | pid, 1);
+
+ if (!pip)
{
- int syscallnum = pip -> prstatus.pr_reg[R_D0];
- if (summary)
- {
- printf_filtered ("%-32s", "Sleeping in system call:");
- printf_filtered ("%s", syscallname (syscallnum));
- }
- else
+ pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
+ memset (pip, 0, sizeof (*pip));
+ if (!open_proc_file ((*lwps << 16) | pid, pip, O_RDONLY, 0))
+ continue;
+
+ make_cleanup (close_proc_file, pip);
+
+ if (!procfs_read_status (pip))
{
- printf_filtered ("Sleeping in system call '%s'.\n",
- syscallname (syscallnum));
+ print_sys_errmsg (pip -> pathname, errno);
+ error ("procfs_read_status failed");
}
}
-#endif
- if (ioctl (pip -> fd, PIOCGENTRY, &pip -> entryset) < 0)
+#endif /* PROCFS_USE_READ_WRITE */
+
+ /* Print verbose information of the requested type(s), or just a summary
+ of the information for all types. */
+
+ printf_filtered ("\nInformation for %s.%d:\n\n", pip -> pathname, *lwps);
+ if (summary || all || flags)
{
- print_sys_errmsg (pip -> pathname, errno);
- error ("PIOCGENTRY failed");
+ info_proc_flags (pip, summary);
}
-
- if (ioctl (pip -> fd, PIOCGEXIT, &pip -> exitset) < 0)
+ if (summary || all)
{
- print_sys_errmsg (pip -> pathname, errno);
- error ("PIOCGEXIT failed");
+ info_proc_stop (pip, summary);
+#ifdef UNIXWARE
+ supply_gregset (&pip->prstatus.pr_lwp.pr_context.uc_mcontext.gregs);
+#else
+ supply_gregset (&pip->prstatus.pr_reg);
+#endif
+ printf_filtered ("PC: ");
+ print_address (read_pc (), gdb_stdout);
+ printf_filtered ("\n");
}
-
- 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++)
+ if (summary || all || signals || faults)
{
- 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");
- }
- }
+ 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);
+#ifndef PROCFS_USE_READ_WRITE
}
+#endif
}
-static char *
-signalname (signo)
- int signo;
+/*
+
+LOCAL FUNCTION
+
+ modify_inherit_on_fork_flag - Change the inherit-on-fork flag
+
+SYNOPSIS
+
+ void modify_inherit_on_fork_flag (fd, flag)
+
+DESCRIPTION
+
+ Call this routine to modify the inherit-on-fork flag. This routine is
+ just a nice wrapper to hide the #ifdefs needed by various systems to
+ control this flag.
+
+ */
+
+static void
+modify_inherit_on_fork_flag (fd, flag)
+ int fd;
+ int flag;
{
- char *name;
- static char locbuf[32];
+#if defined (PIOCSET) || defined (PCSET)
+ long pr_flags;
+#endif
+ int retval = 0;
+ struct proc_ctl pctl;
- name = strsigno (signo);
- if (name == NULL)
+#if defined (PIOCSET) || defined (PCSET) /* New method */
+ pr_flags = PR_FORK;
+ if (flag)
{
- sprintf (locbuf, "Signal %d", signo);
+#ifdef PROCFS_USE_READ_WRITE
+ pctl.cmd = PCSET;
+ pctl.data = PR_FORK;
+ if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
+ retval = -1;
+#else
+ retval = ioctl (fd, PIOCSET, &pr_flags);
+#endif
}
else
{
- sprintf (locbuf, "%s (%d)", name, signo);
+#ifdef PROCFS_USE_READ_WRITE
+ pctl.cmd = PCRESET;
+ pctl.data = PR_FORK;
+ if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
+ retval = -1;
+#else
+ retval = ioctl (fd, PIOCRESET, &pr_flags);
+#endif
}
- return (locbuf);
-}
-
-static char *
-errnoname (errnum)
- int errnum;
-{
- char *name;
- static char locbuf[32];
- name = strerrno (errnum);
- if (name == NULL)
+#else
+#ifdef PIOCSFORK /* Original method */
+ if (flag)
{
- sprintf (locbuf, "Errno %d", errnum);
+ retval = ioctl (fd, PIOCSFORK, NULL);
}
else
{
- sprintf (locbuf, "%s (%d)", name, errnum);
+ retval = ioctl (fd, PIOCRFORK, NULL);
}
- return (locbuf);
+#else
+ Neither PR_FORK nor PIOCSFORK exist!!!
+#endif
+#endif
+
+ if (!retval)
+ return;
+
+ print_sys_errmsg ("modify_inherit_on_fork_flag", errno);
+ error ("PIOCSFORK or PR_FORK modification failed");
}
+/*
+
+LOCAL FUNCTION
+
+ modify_run_on_last_close_flag - Change the run-on-last-close flag
+
+SYNOPSIS
+
+ void modify_run_on_last_close_flag (fd, flag)
+
+DESCRIPTION
+
+ Call this routine to modify the run-on-last-close flag. This routine
+ is just a nice wrapper to hide the #ifdefs needed by various systems to
+ control this flag.
+
+ */
+
static void
-info_proc_signals (pip, summary)
- struct procinfo *pip;
- int summary;
+modify_run_on_last_close_flag (fd, flag)
+ int fd;
+ int flag;
{
- int signo;
+#if defined (PIOCSET) || defined (PCSET)
+ long pr_flags;
+#endif
+ int retval = 0;
+ struct proc_ctl pctl;
- if (!summary)
+#if defined (PIOCSET) || defined (PCSET) /* New method */
+ pr_flags = PR_RLC;
+ if (flag)
{
- 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");
+#ifdef PROCFS_USE_READ_WRITE
+ pctl.cmd = PCSET;
+ pctl.data = PR_RLC;
+ if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
+ retval = -1;
+#else
+ retval = ioctl (fd, PIOCSET, &pr_flags);
+#endif
+ }
+ else
+ {
+#ifdef PROCFS_USE_READ_WRITE
+ pctl.cmd = PCRESET;
+ pctl.data = PR_RLC;
+ if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
+ retval = -1;
+#else
+ retval = ioctl (fd, PIOCRESET, &pr_flags);
+#endif
}
+
+#else
+#ifdef PIOCSRLC /* Original method */
+ if (flag)
+ retval = ioctl (fd, PIOCSRLC, NULL);
+ else
+ retval = ioctl (fd, PIOCRRLC, NULL);
+#else
+ Neither PR_RLC nor PIOCSRLC exist!!!
+#endif
+#endif
+
+ if (!retval)
+ return;
+
+ print_sys_errmsg ("modify_run_on_last_close_flag", errno);
+ error ("PIOCSRLC or PR_RLC modification failed");
}
+/*
+
+LOCAL FUNCTION
+
+ procfs_clear_syscall_trap -- Deletes the trap for the specified system call.
+
+SYNOPSIS
+
+ void procfs_clear_syscall_trap (struct procinfo *, int syscall_num, int errok)
+
+DESCRIPTION
+
+ This function function disables traps for the specified system call.
+ errok is non-zero if errors should be ignored.
+ */
+
static void
-info_proc_faults (pip, summary)
- struct procinfo *pip;
- int summary;
+procfs_clear_syscall_trap (pi, syscall_num, errok)
+ struct procinfo *pi;
+ int syscall_num;
+ int errok;
{
- struct trans *transp;
+ sysset_t sysset;
+ int goterr, i;
- if (!summary)
+#ifndef UNIXWARE
+ goterr = ioctl (pi->ctl_fd, PIOCGENTRY, &sysset) < 0;
+
+ if (goterr && !errok)
{
- 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");
+ print_sys_errmsg (pi->pathname, errno);
+ error ("PIOCGENTRY failed");
+ }
- for (transp = faults_table; transp -> name != NULL; transp++)
+ if (!goterr)
+ {
+ prdelset (&sysset, syscall_num);
+
+ if ((ioctl (pi->ctl_fd, PIOCSENTRY, &sysset) < 0) && !errok)
{
- QUIT;
- printf_filtered ("\t%-12s ", transp -> name);
- printf_filtered ("%-8s", prismember (&pip -> fltset, transp -> value)
- ? "on" : "off");
- printf_filtered ("\n");
+ print_sys_errmsg (pi->pathname, errno);
+ error ("PIOCSENTRY failed");
}
- printf_filtered ("\n");
}
-}
-static void
-info_proc_mappings (pip, summary)
- struct procinfo *pip;
- int summary;
-{
- int nmap;
- struct prmap *prmaps;
- struct prmap *prmap;
+ goterr = ioctl (pi->ctl_fd, PIOCGEXIT, &sysset) < 0;
- if (!summary)
+ if (goterr && !errok)
{
- 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)
+ procfs_clear_syscall_trap (pi, syscall_num, 1);
+ print_sys_errmsg (pi->pathname, errno);
+ error ("PIOCGEXIT failed");
+ }
+
+ if (!goterr)
+ {
+ praddset (&sysset, syscall_num);
+
+ if ((ioctl (pi->ctl_fd, PIOCSEXIT, &sysset) < 0) && !errok)
{
- 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));
- }
- }
+ procfs_clear_syscall_trap (pi, syscall_num, 1);
+ print_sys_errmsg (pi->pathname, errno);
+ error ("PIOCSEXIT failed");
}
- printf_filtered ("\n");
}
+#endif
+
+ if (!pi->syscall_handlers)
+ {
+ if (!errok)
+ error ("procfs_clear_syscall_trap: syscall_handlers is empty");
+ return;
+ }
+
+ /* Remove handler func from the handler list */
+
+ for (i = 0; i < pi->num_syscall_handlers; i++)
+ if (pi->syscall_handlers[i].syscall_num == syscall_num)
+ {
+ if (i + 1 != pi->num_syscall_handlers)
+ { /* Not the last entry.
+ Move subsequent entries fwd. */
+ memcpy (&pi->syscall_handlers[i], &pi->syscall_handlers[i + 1],
+ (pi->num_syscall_handlers - i - 1)
+ * sizeof (struct procfs_syscall_handler));
+ }
+
+ pi->syscall_handlers = xrealloc (pi->syscall_handlers,
+ (pi->num_syscall_handlers - 1)
+ * sizeof (struct procfs_syscall_handler));
+ pi->num_syscall_handlers--;
+ return;
+ }
+
+ if (!errok)
+ error ("procfs_clear_syscall_trap: Couldn't find handler for sys call %d",
+ syscall_num);
}
/*
LOCAL FUNCTION
- info_proc -- implement the "info proc" command
+ procfs_set_syscall_trap -- arrange for a function to be called when the
+ child executes the specified system call.
SYNOPSIS
- void info_proc (char *args, int from_tty)
+ void procfs_set_syscall_trap (struct procinfo *, int syscall_num, int flags,
+ syscall_func_t *function)
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)
-
+ This function sets up an entry and/or exit trap for the specified system
+ call. When the child executes the specified system call, your function
+ will be called with the call #, a flag that indicates entry or exit, and
+ pointers to rtnval and statval (which are used by procfs_wait). The
+ function should return non-zero if something interesting happened, zero
+ otherwise.
*/
static void
-info_proc (args, from_tty)
- char *args;
- int from_tty;
+procfs_set_syscall_trap (pi, syscall_num, flags, func)
+ struct procinfo *pi;
+ int syscall_num;
+ int flags;
+ syscall_func_t *func;
{
- int pid;
- 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. Note
- that inferior_pid may be 0, hence we set okerr. */
+ sysset_t sysset;
- pip = find_procinfo (inferior_pid, 1);
-
- if (args != NULL)
+#ifndef UNIXWARE
+ if (flags & PROCFS_SYSCALL_ENTRY)
{
- if ((argv = buildargv (args)) == NULL)
+ if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysset) < 0)
{
- nomem (0);
+ print_sys_errmsg (pi->pathname, errno);
+ error ("PIOCGENTRY failed");
}
- 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 ((pid = atoi (*argv)) > 0)
- {
- pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
- memset (pip, 0, sizeof (*pip));
+ praddset (&sysset, syscall_num);
- pip->pid = pid;
- if (!open_proc_file (pid, pip, O_RDONLY))
- {
- perror_with_name (pip -> pathname);
- /* NOTREACHED */
- }
- make_cleanup (close_proc_file, pip);
- }
- else if (**argv != '\000')
- {
- error ("Unrecognized or ambiguous keyword `%s'.", *argv);
- }
- argv++;
+ if (ioctl (pi->ctl_fd, PIOCSENTRY, &sysset) < 0)
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ error ("PIOCSENTRY failed");
}
}
- /* 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)
- {
- error ("\
-No process. Start debugging a program or specify an explicit process ID.");
- }
- if (ioctl (pip -> fd, PIOCSTATUS, &(pip -> prstatus)) < 0)
+ if (flags & PROCFS_SYSCALL_EXIT)
{
- print_sys_errmsg (pip -> pathname, errno);
- error ("PIOCSTATUS failed");
- }
+ if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysset) < 0)
+ {
+ procfs_clear_syscall_trap (pi, syscall_num, 1);
+ print_sys_errmsg (pi->pathname, errno);
+ error ("PIOCGEXIT failed");
+ }
- /* Print verbose information of the requested type(s), or just a summary
- of the information for all types. */
+ praddset (&sysset, syscall_num);
- 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 (ioctl (pi->ctl_fd, PIOCSEXIT, &sysset) < 0)
+ {
+ procfs_clear_syscall_trap (pi, syscall_num, 1);
+ print_sys_errmsg (pi->pathname, errno);
+ error ("PIOCSEXIT failed");
+ }
}
- if (summary || all || signals)
+#endif
+
+ if (!pi->syscall_handlers)
{
- info_proc_signals (pip, summary);
+ pi->syscall_handlers = xmalloc (sizeof (struct procfs_syscall_handler));
+ pi->syscall_handlers[0].syscall_num = syscall_num;
+ pi->syscall_handlers[0].func = func;
+ pi->num_syscall_handlers = 1;
}
- if (summary || all || faults)
+ else
{
- info_proc_faults (pip, summary);
- }
- printf_filtered ("\n");
+ int i;
- /* All done, deal with closing any temporary process info structure,
- freeing temporary memory , etc. */
+ for (i = 0; i < pi->num_syscall_handlers; i++)
+ if (pi->syscall_handlers[i].syscall_num == syscall_num)
+ {
+ pi->syscall_handlers[i].func = func;
+ return;
+ }
- do_cleanups (old_chain);
+ pi->syscall_handlers = xrealloc (pi->syscall_handlers, (i + 1)
+ * sizeof (struct procfs_syscall_handler));
+ pi->syscall_handlers[i].syscall_num = syscall_num;
+ pi->syscall_handlers[i].func = func;
+ pi->num_syscall_handlers++;
+ }
}
+#ifdef SYS_lwp_create
+
/*
LOCAL FUNCTION
- procfs_set_sproc_trap -- arrange for child to stop on sproc().
+ procfs_lwp_creation_handler - handle exit from the _lwp_create syscall
SYNOPSIS
- void procfs_set_sproc_trap (struct procinfo *)
+ int procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp)
DESCRIPTION
- This function sets up a trap on sproc system call exits so that we can
- detect the arrival of a new thread. We are called with the new thread
- stopped prior to it's first instruction.
+ This routine is called both when an inferior process and it's new lwp
+ are about to finish a _lwp_create() system call. This is the system
+ call that Solaris uses to create a lightweight process. When the
+ target process gets this event, we can look at sysarg[2] to find the
+ new childs lwp ID, and create a procinfo struct from that. After that,
+ we pretend that we got a SIGTRAP, and return non-zero to tell
+ procfs_wait to wake up. Subsequently, wait_for_inferior gets woken up,
+ sees the new process and continues it.
- Also note that we turn on the inherit-on-fork flag in the child process
- so that any grand-children start with all tracing flags set.
- */
+ When we see the child exiting from lwp_create, we just contine it,
+ since everything was handled when the parent trapped.
-#ifdef SYS_sproc
+NOTES
+ In effect, we are only paying attention to the parent's completion of
+ the lwp_create syscall. If we only paid attention to the child
+ instead, then we wouldn't detect the creation of a suspended thread.
+ */
-static void
-procfs_set_sproc_trap (pi)
+static int
+procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp)
struct procinfo *pi;
+ int syscall_num;
+ int why;
+ int *rtnvalp;
+ int *statvalp;
{
- sysset_t exitset;
-
- if (ioctl (pi->fd, PIOCGEXIT, &exitset) < 0)
- {
- print_sys_errmsg (pi->pathname, errno);
- error ("PIOCGEXIT failed");
- }
+ int lwp_id;
+ struct procinfo *childpi;
+ struct proc_ctl pctl;
- praddset (&exitset, SYS_sproc);
+ /* We've just detected the completion of an lwp_create system call. Now we
+ need to setup a procinfo struct for this thread, and notify the thread
+ system of the new arrival. */
- /* We trap on fork() and vfork() in order to disable debugging in our grand-
- children and descendant processes. At this time, GDB can only handle
- threads (multiple processes, one address space). forks (and execs) result
- in the creation of multiple address spaces, which GDB can't handle yet. */
+ /* If lwp_create failed, then nothing interesting happened. Continue the
+ process and go back to sleep. */
- praddset (&exitset, SYS_fork);
-#ifdef SYS_vfork
- praddset (&exitset, SYS_vfork);
+#ifdef UNIXWARE
+ /* Joel ... can you check this logic out please? JKJ */
+ if (pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs[R_EFL] & 1)
+ { /* _lwp_create failed */
+ pctl.cmd = PCRUN;
+ pctl.data = PRCFAULT;
+
+ if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
+ perror_with_name (pi->pathname);
+
+ return 0;
+ }
+#else /* UNIXWARE */
+ if (PROCFS_GET_CARRY (pi->prstatus.pr_reg))
+ { /* _lwp_create failed */
+ pi->prrun.pr_flags &= PRSTEP;
+ pi->prrun.pr_flags |= PRCFAULT;
+
+ if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
+ perror_with_name (pi->pathname);
+
+ return 0;
+ }
#endif
- if (ioctl (pi->fd, PIOCSEXIT, &exitset) < 0)
- {
- print_sys_errmsg (pi->pathname, errno);
- error ("PIOCSEXIT failed");
+ /* At this point, the new thread is stopped at it's first instruction, and
+ the parent is stopped at the exit from lwp_create. */
+
+ if (pi->new_child) /* Child? */
+ { /* Yes, just continue it */
+#ifdef UNIXWARE
+ pctl.cmd = PCRUN;
+ pctl.data = PRCFAULT;
+
+ if (write(pi->ctl_fd, (char *)&pctl, sizeof (struct proc_ctl)) < 0)
+#else /* !UNIXWARE */
+ pi->prrun.pr_flags &= PRSTEP;
+ pi->prrun.pr_flags |= PRCFAULT;
+
+ if ((pi->prstatus.pr_flags & PR_ISTOP)
+ && ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
+#endif /* !UNIXWARE */
+ perror_with_name (pi->pathname);
+
+ pi->new_child = 0; /* No longer new */
+
+ return 0;
}
- /* Turn on inherit-on-fork flag so that all grand-children of gdb start with
- tracing flags set. */
+ /* We're the proud parent of a new thread. Setup an exit trap for lwp_create
+ in the child and continue the parent. */
-#ifdef PIOCSET /* New method */
- {
- long pr_flags;
- pr_flags = PR_FORK;
- ioctl (pi->fd, PIOCSET, &pr_flags);
- }
+ /* Third arg is pointer to new thread id. */
+#ifdef UNIXWARE
+ lwp_id = read_memory_integer (pi->prstatus.pr_lwp.pr_sysarg[2], sizeof (int));
#else
-#ifdef PIOCSFORK /* Original method */
- ioctl (pi->fd, PIOCSFORK, NULL);
+ lwp_id = read_memory_integer (pi->prstatus.pr_sysarg[2], sizeof (int));
+#endif
+
+ lwp_id = (lwp_id << 16) | PIDGET (pi->pid);
+
+ childpi = create_procinfo (lwp_id);
+
+ /* The new process has actually inherited the lwp_create syscall trap from
+ it's parent, but we still have to call this to register handlers for
+ that child. */
+
+ procfs_set_inferior_syscall_traps (childpi);
+ add_thread (lwp_id);
+ printf_filtered ("[New %s]\n", target_pid_to_str (lwp_id));
+
+ /* Continue the parent */
+#ifdef UNIXWARE
+ pctl.cmd = PCRUN;
+ pctl.data = PRCFAULT;
+
+ if (write(pi->ctl_fd, (char *)&pctl, sizeof (struct proc_ctl)) < 0)
+#else
+ pi->prrun.pr_flags &= PRSTEP;
+ pi->prrun.pr_flags |= PRCFAULT;
+ if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
#endif
+ perror_with_name (pi->pathname);
+
+ /* The new child may have been created in one of two states:
+ SUSPENDED or RUNNABLE. If runnable, we will simply signal it to run.
+ If suspended, we flag it to be continued later, when it has an event. */
+
+#ifdef UNIXWARE
+ if (childpi->prstatus.pr_lwp.pr_why == PR_SUSPENDED)
+#else
+ if (childpi->prstatus.pr_why == PR_SUSPENDED)
+#endif
+ childpi->new_child = 1; /* Flag this as an unseen child process */
+ else
+ {
+ /* Continue the child */
+#ifdef UNIXWARE
+ pctl.cmd = PCRUN;
+ pctl.data = PRCFAULT;
+
+ if (write(pi->ctl_fd, (char *)&pctl, sizeof (struct proc_ctl)) < 0)
+#else
+ childpi->prrun.pr_flags &= PRSTEP;
+ childpi->prrun.pr_flags |= PRCFAULT;
+
+ if (ioctl (childpi->ctl_fd, PIOCRUN, &childpi->prrun) != 0)
#endif
+ perror_with_name (childpi->pathname);
+ }
+ return 0;
}
-#endif /* SYS_sproc */
+#endif /* SYS_lwp_create */
/* Fork an inferior process, and start debugging it with /proc. */
}
fork_inferior (exec_file, allargs, env,
- proc_set_exec_trap, procfs_init_inferior, shell_file);
+ proc_set_exec_trap, procfs_init_inferior, NULL, shell_file);
/* We are at the first instruction we care about. */
/* Pedal to the metal... */
- /* Setup traps on exit from sproc() */
-
-#ifdef SYS_sproc
- procfs_set_sproc_trap (current_procinfo);
-#endif
-
proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0);
}
static int
procfs_can_run ()
{
- return(1);
+ /* This variable is controlled by modules that sit atop procfs that may layer
+ their own process structure atop that provided here. sol-thread.c does
+ this because of the Solaris two-level thread model. */
+
+ return !procfs_suppress_run;
}
-#ifdef TARGET_CAN_USE_HARDWARE_WATCHPOINT
+#ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
+#ifndef UNIXWARE
\f
/* Insert a watchpoint */
int
wpt.pr_vaddr = (caddr_t)addr;
wpt.pr_size = len;
wpt.pr_wflags = ((rw & 1) ? MA_READ : 0) | ((rw & 2) ? MA_WRITE : 0);
- if (ioctl (pi->fd, PIOCSWATCH, &wpt) < 0)
+ if (ioctl (pi->ctl_fd, PIOCSWATCH, &wpt) < 0)
{
if (errno == E2BIG)
return -1;
what = pi->prstatus.pr_what;
if (why == PR_FAULTED
#if defined (FLTWATCH) && defined (FLTKWATCH)
- && (what == FLTWATCH) || (what == FLTKWATCH)
+ && (what == FLTWATCH || what == FLTKWATCH)
#else
#ifdef FLTWATCH
&& (what == FLTWATCH)
}
return 0;
}
-#endif
+#endif /* !UNIXWARE */
+#endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */
+
+/* Why is this necessary? Shouldn't dead threads just be removed from the
+ thread database? */
+
+static int
+procfs_thread_alive (pid)
+ int pid;
+{
+ struct procinfo *pi, *next_pi;
+
+ for (pi = procinfo_list; pi; pi = next_pi)
+ {
+ next_pi = pi->next;
+ if (pi -> pid == pid)
+ if (procfs_read_status (pi)) /* alive */
+ return 1;
+ else /* defunct (exited) */
+ {
+ close_proc_file (pi);
+ return 0;
+ }
+ }
+ return 0;
+}
+int
+procfs_first_available ()
+{
+ struct procinfo *pi;
+
+ for (pi = procinfo_list; pi; pi = pi->next)
+ {
+ if (procfs_read_status (pi))
+ return pi->pid;
+ }
+ return -1;
+}
+
+int
+procfs_get_pid_fd (pid)
+ int pid;
+{
+ struct procinfo *pi = find_procinfo (pid, 1);
+
+ if (pi == NULL)
+ return -1;
+
+ return pi->ctl_fd;
+}
+
+/* Send a SIGINT to the process group. This acts just like the user typed a
+ ^C on the controlling terminal.
+
+ XXX - This may not be correct for all systems. Some may want to use
+ killpg() instead of kill (-pgrp). */
+
+static void
+procfs_stop ()
+{
+ extern pid_t inferior_process_group;
+
+ kill (-inferior_process_group, SIGINT);
+}
+\f
+/* Convert a pid to printable form. */
+
+#ifdef TIDGET
+char *
+procfs_pid_to_str (pid)
+ int pid;
+{
+ static char buf[100];
+
+ sprintf (buf, "Kernel thread %d", TIDGET (pid));
+
+ return buf;
+}
+#endif /* TIDGET */
\f
struct target_ops procfs_ops = {
"procfs", /* to_shortname */
"Unix /proc child process (started by the \"run\" command).", /* to_doc */
procfs_open, /* to_open */
0, /* to_close */
- procfs_attach, /* to_attach */
+ procfs_attach, /* to_attach */
+ NULL, /* to_post_attach */
+ procfs_attach, /* to_require_attach */
procfs_detach, /* to_detach */
- procfs_resume, /* to_resume */
+ procfs_detach, /* to_require_detach */
+ procfs_resume, /* to_resume */
procfs_wait, /* to_wait */
+ NULL, /* to_post_wait */
procfs_fetch_registers, /* to_fetch_registers */
procfs_store_registers, /* to_store_registers */
procfs_prepare_to_store, /* to_prepare_to_store */
0, /* to_load */
0, /* to_lookup_symbol */
procfs_create_inferior, /* to_create_inferior */
+ NULL, /* to_post_startup_inferior */
+ NULL, /* to_acknowledge_created_inferior */
+ NULL, /* to_clone_and_follow_inferior */
+ NULL, /* to_post_follow_inferior_by_clone */
+ NULL, /* to_insert_fork_catchpoint */
+ NULL, /* to_remove_fork_catchpoint */
+ NULL, /* to_insert_vfork_catchpoint */
+ NULL, /* to_remove_vfork_catchpoint */
+ NULL, /* to_has_forked */
+ NULL, /* to_has_vforked */
+ NULL, /* to_can_follow_vfork_prior_to_exec */
+ NULL, /* to_post_follow_vfork */
+ NULL, /* to_insert_exec_catchpoint */
+ NULL, /* to_remove_exec_catchpoint */
+ NULL, /* to_has_execd */
+ NULL, /* to_reported_exec_events_per_exec_call */
+ NULL, /* to_has_syscall_event */
+ NULL, /* to_has_exited */
procfs_mourn_inferior, /* to_mourn_inferior */
procfs_can_run, /* to_can_run */
procfs_notice_signals, /* to_notice_signals */
+ procfs_thread_alive, /* to_thread_alive */
+ procfs_stop, /* to_stop */
+ NULL, /* to_enable_exception_callback */
+ NULL, /* to_get_current_exception_event */
+ NULL, /* to_pid_to_exec_file */
+ NULL, /* to_core_file_to_sym_file */
process_stratum, /* to_stratum */
0, /* to_next */
1, /* to_has_all_memory */
void
_initialize_procfs ()
{
+#ifdef HAVE_OPTIONAL_PROC_FS
+ char procname[MAX_PROC_NAME_SIZE];
+ int fd;
+
+ /* If we have an optional /proc filesystem (e.g. under OSF/1),
+ don't add procfs support if we cannot access the running
+ GDB via /proc. */
+ sprintf (procname, STATUS_PROC_NAME_FMT, getpid ());
+ if ((fd = open (procname, O_RDONLY)) < 0)
+ return;
+ close (fd);
+#endif
+
add_target (&procfs_ops);
- add_info ("proc", info_proc,
+ add_info ("processes", 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\
projects / deliverable / binutils-gdb.git / blobdiff