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diff --git a/gdb/convex-xdep.c b/gdb/convex-xdep.c
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+/* Convex host-dependent code for GDB.
+ Copyright 1990, 1991, 1992 Free Software Foundation, Inc.
+
+This file is part of GDB.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#include "defs.h"
+#include "command.h"
+#include "symtab.h"
+#include "value.h"
+#include "frame.h"
+#include "inferior.h"
+#include "wait.h"
+
+#include <signal.h>
+#include <fcntl.h>
+#include "gdbcore.h"
+
+#include <sys/param.h>
+#include <sys/dir.h>
+#include <sys/user.h>
+#include <sys/ioctl.h>
+#include <sys/pcntl.h>
+#include <sys/thread.h>
+#include <sys/proc.h>
+#include <sys/file.h>
+#include "gdb_stat.h"
+#include <sys/mman.h>
+
+#include <convex/vmparam.h>
+#include <convex/filehdr.h>
+#include <convex/opthdr.h>
+#include <convex/scnhdr.h>
+#include <convex/core.h>
+
+/* Per-thread data, read from the inferior at each stop and written
+ back at each resume. */
+
+/* Number of active threads.
+ Tables are valid for thread numbers less than this. */
+
+static int n_threads;
+
+#define MAXTHREADS 8
+
+/* Thread state. The remaining data is valid only if this is PI_TALIVE. */
+
+static int thread_state[MAXTHREADS];
+
+/* Stop pc, signal, signal subcode */
+
+static int thread_pc[MAXTHREADS];
+static int thread_signal[MAXTHREADS];
+static int thread_sigcode[MAXTHREADS];
+
+/* Thread registers.
+ If thread is selected, the regs are in registers[] instead. */
+
+static char thread_regs[MAXTHREADS][REGISTER_BYTES];
+
+/* 1 if the top frame on the thread's stack was a context frame,
+ meaning that the kernel is up to something and we should not
+ touch the thread at all except to resume it. */
+
+static char thread_is_in_kernel[MAXTHREADS];
+
+/* The currently selected thread's number. */
+
+static int inferior_thread;
+
+/* Inferior process's file handle and a process control block
+ to feed args to ioctl with. */
+
+static int inferior_fd;
+static struct pcntl ps;
+
+/* SOFF file headers for exec or core file. */
+
+static FILEHDR filehdr;
+static OPTHDR opthdr;
+static SCNHDR scnhdr;
+
+/* Address maps constructed from section headers of exec and core files.
+ Defines process address -> file address translation. */
+
+struct pmap
+{
+ long mem_addr; /* process start address */
+ long mem_end; /* process end+1 address */
+ long file_addr; /* file start address */
+ long thread; /* -1 shared; 0,1,... thread-local */
+ long type; /* S_TEXT S_DATA S_BSS S_TBSS etc */
+ long which; /* used to sort map for info files */
+};
+
+static int n_exec, n_core;
+static struct pmap exec_map[100];
+static struct pmap core_map[100];
+
+/* Offsets in the core file of core_context and core_tcontext blocks. */
+
+static int context_offset;
+static int tcontext_offset[MAXTHREADS];
+
+/* Core file control blocks. */
+
+static struct core_context_v70 c;
+static struct core_tcontext_v70 tc;
+static struct user u;
+static thread_t th;
+static proc_t pr;
+
+/* The registers of the currently selected thread. */
+
+extern char registers[REGISTER_BYTES];
+
+/* Vector and communication registers from core dump or from inferior.
+ These are read on demand, ie, not normally valid. */
+
+static struct vecst vector_registers;
+static struct creg_ctx comm_registers;
+
+/* Flag, set on a vanilla CONT command and cleared when the inferior
+ is continued. */
+
+static int all_continue;
+
+/* Flag, set when the inferior is continued by a vanilla CONT command,
+ cleared if it is continued for any other purpose. */
+
+static int thread_switch_ok;
+
+/* Stack of signals recieved from threads but not yet delivered to gdb. */
+
+struct threadpid
+{
+ int pid;
+ int thread;
+ int signo;
+ int subsig;
+ int pc;
+};
+
+static struct threadpid signal_stack_bot[100];
+static struct threadpid *signal_stack = signal_stack_bot;
+
+/* How to detect empty stack -- bottom frame is all zero. */
+
+#define signal_stack_is_empty() (signal_stack->pid == 0)
+
+/* Mode controlled by SET PIPE command, controls the psw SEQ bit
+ which forces each instruction to complete before the next one starts. */
+
+static int sequential = 0;
+
+/* Mode controlled by the SET PARALLEL command. Values are:
+ 0 concurrency limit 1 thread, dynamic scheduling
+ 1 no concurrency limit, dynamic scheduling
+ 2 no concurrency limit, fixed scheduling */
+
+static int parallel = 1;
+
+/* Mode controlled by SET BASE command, output radix for unformatted
+ integer typeout, as in argument lists, aggregates, and so on.
+ Zero means guess whether it's an address (hex) or not (decimal). */
+
+static int output_radix = 0;
+
+/* Signal subcode at last thread stop. */
+
+static int stop_sigcode;
+
+/* Hack, see wait() below. */
+
+static int exec_trap_timer;
+
+#include "gdbcmd.h"
+
+static struct type *vector_type ();
+static long *read_vector_register ();
+static long *read_vector_register_1 ();
+static void write_vector_register ();
+static ULONGEST read_comm_register ();
+static void write_comm_register ();
+static void convex_cont_command ();
+static void thread_continue ();
+static void select_thread ();
+static void scan_stack ();
+static void set_fixed_scheduling ();
+static char *subsig_name ();
+static void psw_info ();
+static sig_noop ();
+static ptr_cmp ();
+
+
+/* Execute ptrace. Convex V7 replaced ptrace with pattach.
+ Allow ptrace (0) as a no-op. */
+
+int
+call_ptrace (request, pid, procaddr, buf)
+ int request, pid;
+ PTRACE_ARG3_TYPE procaddr;
+ int buf;
+{
+ if (request == 0)
+ return;
+ error ("no ptrace");
+}
+
+/* Replacement for system execle routine.
+ Convert it to an equivalent exect, which pattach insists on. */
+
+execle (name, argv)
+ char *name, *argv;
+{
+ char ***envp = (char ***) &argv;
+ while (*envp++) ;
+
+ signal (SIGTRAP, sig_noop);
+ exect (name, &argv, *envp);
+}
+
+/* Stupid handler for stupid trace trap that otherwise causes
+ startup to stupidly hang. */
+
+static sig_noop ()
+{}
+
+/* Read registers from inferior into registers[] array.
+ For convex, they are already there, read in when the inferior stops. */
+
+void
+fetch_inferior_registers (regno)
+ int regno;
+{
+}
+
+/* Store our register values back into the inferior.
+ For Convex, do this only once, right before resuming inferior. */
+
+void
+store_inferior_registers (regno)
+ int regno;
+{
+}
+
+/* Copy LEN bytes from inferior's memory starting at MEMADDR
+ to debugger memory starting at MYADDR.
+ On failure (cannot read from inferior, usually because address is out
+ of bounds) returns the value of errno. */
+
+int
+read_inferior_memory (memaddr, myaddr, len)
+ CORE_ADDR memaddr;
+ char *myaddr;
+ int len;
+{
+ errno = 0;
+ while (len > 0)
+ {
+ /* little-known undocumented max request size */
+ int i = (len < 12288) ? len : 12288;
+
+ lseek (inferior_fd, memaddr, 0);
+ read (inferior_fd, myaddr, i);
+
+ memaddr += i;
+ myaddr += i;
+ len -= i;
+ }
+ if (errno)
+ memset (myaddr, '\0', len);
+ return errno;
+}
+
+/* Copy LEN bytes of data from debugger memory at MYADDR
+ to inferior's memory at MEMADDR.
+ Returns errno on failure (cannot write the inferior) */
+
+int
+write_inferior_memory (memaddr, myaddr, len)
+ CORE_ADDR memaddr;
+ char *myaddr;
+ int len;
+{
+ errno = 0;
+ lseek (inferior_fd, memaddr, 0);
+ write (inferior_fd, myaddr, len);
+ return errno;
+}
+
+/* Here from create_inferior when the inferior process has been created
+ and started up. We must do a pattach to grab it for debugging.
+
+ Also, intercept the CONT command by altering its dispatch address. */
+/* FIXME: This used to be called from a macro CREATE_INFERIOR_HOOK.
+ But now init_trace_fun is in the same place. So re-write this to
+ use the init_trace_fun (making convex a debugging target). */
+
+create_inferior_hook (pid)
+ int pid;
+{
+ static char cont[] = "cont";
+ static char cont1[] = "c";
+ char *linep = cont;
+ char *linep1 = cont1;
+ char **line = &linep;
+ char **line1 = &linep1;
+ struct cmd_list_element *c;
+
+ c = lookup_cmd (line, cmdlist, "", 0);
+ c->function = convex_cont_command;
+ c = lookup_cmd (line1, cmdlist, "", 0);
+ c->function = convex_cont_command;
+
+ inferior_fd = pattach (pid, O_EXCL);
+ if (inferior_fd < 0)
+ perror_with_name ("pattach");
+ inferior_thread = 0;
+ set_fixed_scheduling (pid, parallel == 2);
+}
+
+/* Attach process PID for debugging. */
+
+attach (pid)
+ int pid;
+{
+ int fd = pattach (pid, O_EXCL);
+ if (fd < 0)
+ perror_with_name ("pattach");
+ attach_flag = 1;
+ /* wait for strange kernel reverberations to go away */
+ sleep (1);
+
+ setpgrp (pid, pid);
+
+ inferior_fd = fd;
+ inferior_thread = 0;
+ return pid;
+}
+
+/* Stop debugging the process whose number is PID
+ and continue it with signal number SIGNAL.
+ SIGNAL = 0 means just continue it. */
+
+void
+detach (signal)
+ int signal;
+{
+ signal_stack = signal_stack_bot;
+ thread_continue (-1, 0, signal);
+ ioctl (inferior_fd, PIXDETACH, &ps);
+ close (inferior_fd);
+ inferior_fd = 0;
+ attach_flag = 0;
+}
+
+/* Kill off the inferior process. */
+
+kill_inferior ()
+{
+ if (inferior_pid == 0)
+ return;
+ ioctl (inferior_fd, PIXTERMINATE, 0);
+ wait (0);
+ target_mourn_inferior ();
+}
+
+/* Read vector register REG, and return a pointer to the value. */
+
+static long *
+read_vector_register (reg)
+ int reg;
+{
+ if (have_inferior_p ())
+ {
+ errno = 0;
+ ps.pi_buffer = (char *) &vector_registers;
+ ps.pi_nbytes = sizeof vector_registers;
+ ps.pi_offset = 0;
+ ps.pi_thread = inferior_thread;
+ ioctl (inferior_fd, PIXRDVREGS, &ps);
+ if (errno)
+ memset (&vector_registers, '\0', sizeof vector_registers);
+ }
+ else if (corechan >= 0)
+ {
+ lseek (corechan, tcontext_offset[inferior_thread], 0);
+ if (myread (corechan, &tc, sizeof tc) < 0)
+ perror_with_name (corefile);
+ lseek (corechan, tc.core_thread_p, 0);
+ if (myread (corechan, &th, sizeof th) < 0)
+ perror_with_name (corefile);
+ lseek (corechan, tc.core_vregs_p, 0);
+ if (myread (corechan, &vector_registers, 16*128) < 0)
+ perror_with_name (corefile);
+ vector_registers.vm[0] = th.t_vect_ctx.vc_vm[0];
+ vector_registers.vm[1] = th.t_vect_ctx.vc_vm[1];
+ vector_registers.vls = th.t_vect_ctx.vc_vls;
+ }
+
+ return read_vector_register_1 (reg);
+}
+
+/* Return a pointer to vector register REG, which must already have been
+ fetched from the inferior or core file. */
+
+static long *
+read_vector_register_1 (reg)
+ int reg;
+{
+ switch (reg)
+ {
+ case VM_REGNUM:
+ return (long *) vector_registers.vm;
+ case VS_REGNUM:
+ return (long *) &vector_registers.vls;
+ case VL_REGNUM:
+ return 1 + (long *) &vector_registers.vls;
+ default:
+ return (long *) &vector_registers.vr[reg];
+ }
+}
+
+/* Write vector register REG, element ELEMENT, new value VAL.
+ NB: must use read-modify-write on the entire vector state,
+ since pattach does not do offsetted writes correctly. */
+
+static void
+write_vector_register (reg, element, val)
+ int reg, element;
+ ULONGEST val;
+{
+ if (have_inferior_p ())
+ {
+ errno = 0;
+ ps.pi_thread = inferior_thread;
+ ps.pi_offset = 0;
+ ps.pi_buffer = (char *) &vector_registers;
+ ps.pi_nbytes = sizeof vector_registers;
+
+ ioctl (inferior_fd, PIXRDVREGS, &ps);
+
+ switch (reg)
+ {
+ case VL_REGNUM:
+ vector_registers.vls =
+ (vector_registers.vls & 0xffffffff00000000LL)
+ + (unsigned long) val;
+ break;
+
+ case VS_REGNUM:
+ vector_registers.vls =
+ (val << 32) + (unsigned long) vector_registers.vls;
+ break;
+
+ default:
+ vector_registers.vr[reg].el[element] = val;
+ break;
+ }
+
+ ioctl (inferior_fd, PIXWRVREGS, &ps);
+
+ if (errno)
+ perror_with_name ("writing vector register");
+ }
+}
+
+/* Return the contents of communication register NUM. */
+
+static ULONGEST
+read_comm_register (num)
+ int num;
+{
+ if (have_inferior_p ())
+ {
+ ps.pi_buffer = (char *) &comm_registers;
+ ps.pi_nbytes = sizeof comm_registers;
+ ps.pi_offset = 0;
+ ps.pi_thread = inferior_thread;
+ ioctl (inferior_fd, PIXRDCREGS, &ps);
+ }
+ return comm_registers.crreg.r4[num];
+}
+
+/* Store a new value VAL into communication register NUM.
+ NB: Must use read-modify-write on the whole comm register set
+ since pattach does not do offsetted writes correctly. */
+
+static void
+write_comm_register (num, val)
+ int num;
+ ULONGEST val;
+{
+ if (have_inferior_p ())
+ {
+ ps.pi_buffer = (char *) &comm_registers;
+ ps.pi_nbytes = sizeof comm_registers;
+ ps.pi_offset = 0;
+ ps.pi_thread = inferior_thread;
+ ioctl (inferior_fd, PIXRDCREGS, &ps);
+ comm_registers.crreg.r4[num] = val;
+ ioctl (inferior_fd, PIXWRCREGS, &ps);
+ }
+}
+
+/* Resume execution of the inferior process.
+ If STEP is nonzero, single-step it.
+ If SIGNAL is nonzero, give it that signal. */
+
+void
+resume (step, signal)
+ int step;
+ int signal;
+{
+ errno = 0;
+ if (step || signal)
+ thread_continue (inferior_thread, step, signal);
+ else
+ thread_continue (-1, 0, 0);
+}
+
+/* Maybe resume some threads.
+ THREAD is which thread to resume, or -1 to resume them all.
+ STEP and SIGNAL are as in resume.
+
+ Global variable ALL_CONTINUE is set when we are here to do a
+ `cont' command; otherwise we may be doing `finish' or a call or
+ something else that will not tolerate an automatic thread switch.
+
+ If there are stopped threads waiting to deliver signals, and
+ ALL_CONTINUE, do not actually resume anything. gdb will do a wait
+ and see one of the stopped threads in the queue. */
+
+static void
+thread_continue (thread, step, signal)
+ int thread, step, signal;
+{
+ int n;
+
+ /* If we are to continue all threads, but not for the CONTINUE command,
+ pay no attention and continue only the selected thread. */
+
+ if (thread < 0 && ! all_continue)
+ thread = inferior_thread;
+
+ /* If we are not stepping, we have now executed the continue part
+ of a CONTINUE command. */
+
+ if (! step)
+ all_continue = 0;
+
+ /* Allow wait() to switch threads if this is an all-out continue. */
+
+ thread_switch_ok = thread < 0;
+
+ /* If there are threads queued up, don't resume. */
+
+ if (thread_switch_ok && ! signal_stack_is_empty ())
+ return;
+
+ /* OK, do it. */
+
+ for (n = 0; n < n_threads; n++)
+ if (thread_state[n] == PI_TALIVE)
+ {
+ select_thread (n);
+
+ if ((thread < 0 || n == thread) && ! thread_is_in_kernel[n])
+ {
+ /* Blam the trace bits in the stack's saved psws to match
+ the desired step mode. This is required so that
+ single-stepping a return doesn't restore a psw with a
+ clear trace bit and fly away, and conversely,
+ proceeding through a return in a routine that was
+ stepped into doesn't cause a phantom break by restoring
+ a psw with the trace bit set. */
+ scan_stack (PSW_T_BIT, step);
+ scan_stack (PSW_S_BIT, sequential);
+ }
+
+ ps.pi_buffer = registers;
+ ps.pi_nbytes = REGISTER_BYTES;
+ ps.pi_offset = 0;
+ ps.pi_thread = n;
+ if (! thread_is_in_kernel[n])
+ if (ioctl (inferior_fd, PIXWRREGS, &ps))
+ perror_with_name ("PIXWRREGS");
+
+ if (thread < 0 || n == thread)
+ {
+ ps.pi_pc = 1;
+ ps.pi_signo = signal;
+ if (ioctl (inferior_fd, step ? PIXSTEP : PIXCONTINUE, &ps) < 0)
+ perror_with_name ("PIXCONTINUE");
+ }
+ }
+
+ if (ioctl (inferior_fd, PIXRUN, &ps) < 0)
+ perror_with_name ("PIXRUN");
+}
+
+/* Replacement for system wait routine.
+
+ The system wait returns with one or more threads stopped by
+ signals. Put stopped threads on a stack and return them one by
+ one, so that it appears that wait returns one thread at a time.
+
+ Global variable THREAD_SWITCH_OK is set when gdb can tolerate wait
+ returning a new thread. If it is false, then only one thread is
+ running; we will do a real wait, the thread will do something, and
+ we will return that. */
+
+pid_t
+wait (w)
+ union wait *w;
+{
+ int pid;
+
+ if (!w)
+ return wait3 (0, 0, 0);
+
+ /* Do a real wait if we were told to, or if there are no queued threads. */
+
+ if (! thread_switch_ok || signal_stack_is_empty ())
+ {
+ int thread;
+
+ pid = wait3 (w, 0, 0);
+
+ if (!WIFSTOPPED (*w) || pid != inferior_pid)
+ return pid;
+
+ /* The inferior has done something and stopped. Read in all the
+ threads' registers, and queue up any signals that happened. */
+
+ if (ioctl (inferior_fd, PIXGETTHCOUNT, &ps) < 0)
+ perror_with_name ("PIXGETTHCOUNT");
+
+ n_threads = ps.pi_othdcnt;
+ for (thread = 0; thread < n_threads; thread++)
+ {
+ ps.pi_thread = thread;
+ if (ioctl (inferior_fd, PIXGETSUBCODE, &ps) < 0)
+ perror_with_name ("PIXGETSUBCODE");
+ thread_state[thread] = ps.pi_otstate;
+
+ if (ps.pi_otstate == PI_TALIVE)
+ {
+ select_thread (thread);
+ ps.pi_buffer = registers;
+ ps.pi_nbytes = REGISTER_BYTES;
+ ps.pi_offset = 0;
+ ps.pi_thread = thread;
+ if (ioctl (inferior_fd, PIXRDREGS, &ps) < 0)
+ perror_with_name ("PIXRDREGS");
+
+ registers_fetched ();
+
+ thread_pc[thread] = read_pc ();
+ thread_signal[thread] = ps.pi_osigno;
+ thread_sigcode[thread] = ps.pi_osigcode;
+
+ /* If the thread's stack has a context frame
+ on top, something fucked is going on. I do not
+ know what, but do I know this: the only thing you
+ can do with such a thread is continue it. */
+
+ thread_is_in_kernel[thread] =
+ ((read_register (PS_REGNUM) >> 25) & 3) == 0;
+
+ /* Signals push an extended frame and then fault
+ with a ridiculous pc. Pop the frame. */
+
+ if (thread_pc[thread] > STACK_END_ADDR)
+ {
+ POP_FRAME;
+ if (is_break_pc (thread_pc[thread]))
+ thread_pc[thread] = read_pc () - 2;
+ else
+ thread_pc[thread] = read_pc ();
+ write_register (PC_REGNUM, thread_pc[thread]);
+ }
+
+ if (ps.pi_osigno || ps.pi_osigcode)
+ {
+ signal_stack++;
+ signal_stack->pid = pid;
+ signal_stack->thread = thread;
+ signal_stack->signo = thread_signal[thread];
+ signal_stack->subsig = thread_sigcode[thread];
+ signal_stack->pc = thread_pc[thread];
+ }
+
+ /* The following hackery is caused by a unix 7.1 feature:
+ the inferior's fixed scheduling mode is cleared when
+ it execs the shell (since the shell is not a parallel
+ program). So, note the 5.4 trap we get when
+ the shell does its exec, then catch the 5.0 trap
+ that occurs when the debuggee starts, and set fixed
+ scheduling mode properly. */
+
+ if (ps.pi_osigno == 5 && ps.pi_osigcode == 4)
+ exec_trap_timer = 1;
+ else
+ exec_trap_timer--;
+
+ if (ps.pi_osigno == 5 && exec_trap_timer == 0)
+ set_fixed_scheduling (pid, parallel == 2);
+ }
+ }
+
+ if (signal_stack_is_empty ())
+ error ("no active threads?!");
+ }
+
+ /* Select the thread that stopped, and return *w saying why. */
+
+ select_thread (signal_stack->thread);
+
+ FIXME: need to convert from host sig.
+ stop_signal = signal_stack->signo;
+ stop_sigcode = signal_stack->subsig;
+
+ WSETSTOP (*w, signal_stack->signo);
+ w->w_thread = signal_stack->thread;
+ return (signal_stack--)->pid;
+}
+
+/* Select thread THREAD -- its registers, stack, per-thread memory.
+ This is the only routine that may assign to inferior_thread
+ or thread_regs[]. */
+
+static void
+select_thread (thread)
+ int thread;
+{
+ if (thread == inferior_thread)
+ return;
+
+ memcpy (thread_regs[inferior_thread], registers, REGISTER_BYTES);
+ ps.pi_thread = inferior_thread = thread;
+ if (have_inferior_p ())
+ ioctl (inferior_fd, PISETRWTID, &ps);
+ memcpy (registers, thread_regs[thread], REGISTER_BYTES);
+}
+
+/* Routine to set or clear a psw bit in the psw and also all psws
+ saved on the stack. Quits when we get to a frame in which the
+ saved psw is correct. */
+
+static void
+scan_stack (bit, val)
+ long bit, val;
+{
+ long ps = read_register (PS_REGNUM);
+ long fp;
+ if (val ? !(ps & bit) : (ps & bit))
+ {
+ ps ^= bit;
+ write_register (PS_REGNUM, ps);
+
+ fp = read_register (FP_REGNUM);
+ while (fp & 0x80000000)
+ {
+ ps = read_memory_integer (fp + 4, 4);
+ if (val ? (ps & bit) : !(ps & bit))
+ break;
+ ps ^= bit;
+ write_memory (fp + 4, &ps, 4);
+ fp = read_memory_integer (fp + 8, 4);
+ }
+ }
+}
+
+/* Set fixed scheduling (alliant mode) of process PID to ARG (0 or 1). */
+
+static void
+set_fixed_scheduling (pid, arg)
+ int arg;
+{
+ struct pattributes pattr;
+ getpattr (pid, &pattr);
+ pattr.pattr_pfixed = arg;
+ setpattr (pid, &pattr);
+}
+
+void
+core_file_command (filename, from_tty)
+ char *filename;
+ int from_tty;
+{
+ int n;
+
+ /* Discard all vestiges of any previous core file
+ and mark data and stack spaces as empty. */
+
+ if (corefile)
+ free (corefile);
+ corefile = 0;
+
+ if (corechan >= 0)
+ close (corechan);
+ corechan = -1;
+
+ data_start = 0;
+ data_end = 0;
+ stack_start = STACK_END_ADDR;
+ stack_end = STACK_END_ADDR;
+ n_core = 0;
+
+ /* Now, if a new core file was specified, open it and digest it. */
+
+ if (filename)
+ {
+ filename = tilde_expand (filename);
+ make_cleanup (free, filename);
+
+ if (have_inferior_p ())
+ error ("To look at a core file, you must kill the program with \"kill\".");
+ corechan = open (filename, O_RDONLY, 0);
+ if (corechan < 0)
+ perror_with_name (filename);
+
+ if (myread (corechan, &filehdr, sizeof filehdr) < 0)
+ perror_with_name (filename);
+
+ if (!IS_CORE_SOFF_MAGIC (filehdr.h_magic))
+ error ("%s: not a core file.\n", filename);
+
+ if (myread (corechan, &opthdr, filehdr.h_opthdr) < 0)
+ perror_with_name (filename);
+
+ /* Read through the section headers.
+ For text, data, etc, record an entry in the core file map.
+ For context and tcontext, record the file address of
+ the context blocks. */
+
+ lseek (corechan, (long) filehdr.h_scnptr, 0);
+
+ n_threads = 0;
+ for (n = 0; n < filehdr.h_nscns; n++)
+ {
+ if (myread (corechan, &scnhdr, sizeof scnhdr) < 0)
+ perror_with_name (filename);
+ if ((scnhdr.s_flags & S_TYPMASK) >= S_TEXT
+ && (scnhdr.s_flags & S_TYPMASK) <= S_COMON)
+ {
+ core_map[n_core].mem_addr = scnhdr.s_vaddr;
+ core_map[n_core].mem_end = scnhdr.s_vaddr + scnhdr.s_size;
+ core_map[n_core].file_addr = scnhdr.s_scnptr;
+ core_map[n_core].type = scnhdr.s_flags & S_TYPMASK;
+ if (core_map[n_core].type != S_TBSS
+ && core_map[n_core].type != S_TDATA
+ && core_map[n_core].type != S_TTEXT)
+ core_map[n_core].thread = -1;
+ else if (n_core == 0
+ || core_map[n_core-1].mem_addr != scnhdr.s_vaddr)
+ core_map[n_core].thread = 0;
+ else
+ core_map[n_core].thread = core_map[n_core-1].thread + 1;
+ n_core++;
+ }
+ else if ((scnhdr.s_flags & S_TYPMASK) == S_CONTEXT)
+ context_offset = scnhdr.s_scnptr;
+ else if ((scnhdr.s_flags & S_TYPMASK) == S_TCONTEXT)
+ tcontext_offset[n_threads++] = scnhdr.s_scnptr;
+ }
+
+ /* Read the context block, struct user, struct proc,
+ and the comm regs. */
+
+ lseek (corechan, context_offset, 0);
+ if (myread (corechan, &c, sizeof c) < 0)
+ perror_with_name (filename);
+ lseek (corechan, c.core_user_p, 0);
+ if (myread (corechan, &u, sizeof u) < 0)
+ perror_with_name (filename);
+ lseek (corechan, c.core_proc_p, 0);
+ if (myread (corechan, &pr, sizeof pr) < 0)
+ perror_with_name (filename);
+ comm_registers = pr.p_creg;
+
+ /* Core file apparently is really there. Make it really exist
+ for xfer_core_file so we can do read_memory on it. */
+
+ if (filename[0] == '/')
+ corefile = savestring (filename, strlen (filename));
+ else
+ corefile = concat (current_directory, "/", filename, NULL);
+
+ printf_filtered ("Program %s ", u.u_comm);
+
+ /* Read the thread registers and fill in the thread_xxx[] data. */
+
+ for (n = 0; n < n_threads; n++)
+ {
+ select_thread (n);
+
+ lseek (corechan, tcontext_offset[n], 0);
+ if (myread (corechan, &tc, sizeof tc) < 0)
+ perror_with_name (corefile);
+ lseek (corechan, tc.core_thread_p, 0);
+ if (myread (corechan, &th, sizeof th) < 0)
+ perror_with_name (corefile);
+
+ lseek (corechan, tc.core_syscall_context_p, 0);
+ if (myread (corechan, registers, REGISTER_BYTES) < 0)
+ perror_with_name (corefile);
+
+ thread_signal[n] = th.t_cursig;
+ thread_sigcode[n] = th.t_code;
+ thread_state[n] = th.t_state;
+ thread_pc[n] = read_pc ();
+
+ if (thread_pc[n] > STACK_END_ADDR)
+ {
+ POP_FRAME;
+ if (is_break_pc (thread_pc[n]))
+ thread_pc[n] = read_pc () - 2;
+ else
+ thread_pc[n] = read_pc ();
+ write_register (PC_REGNUM, thread_pc[n]);
+ }
+
+ printf_filtered ("thread %d received signal %d, %s\n",
+ n, thread_signal[n],
+ safe_strsignal (thread_signal[n]));
+ }
+
+ /* Select an interesting thread -- also-rans died with SIGKILL,
+ so find one that didn't. */
+
+ for (n = 0; n < n_threads; n++)
+ if (thread_signal[n] != 0 && thread_signal[n] != SIGKILL)
+ {
+ select_thread (n);
+ stop_signal = thread_signal[n];
+ stop_sigcode = thread_sigcode[n];
+ break;
+ }
+
+ core_aouthdr.a_magic = 0;
+
+ flush_cached_frames ();
+ select_frame (get_current_frame (), 0);
+ validate_files ();
+
+ print_stack_frame (selected_frame, selected_frame_level, -1);
+ }
+ else if (from_tty)
+ printf_filtered ("No core file now.\n");
+}
generated by cgit v1.1 at 2024-11-04 23:39:40 +0000