4ace50a510
libiberty/strsignal.c. Widespread changes to use libiberty/strerror.c functions for errno manipulations and libiberty/strsignal.c for signo (signals) manipulations.
980 lines
25 KiB
C
980 lines
25 KiB
C
/* Convex stuff for GDB.
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Copyright (C) 1990-1991 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "defs.h"
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#include "command.h"
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#include "symtab.h"
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#include "value.h"
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#include "frame.h"
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#include "inferior.h"
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#include "wait.h"
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#include <signal.h>
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#include <fcntl.h>
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#include "gdbcore.h"
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#include <sys/param.h>
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#include <sys/dir.h>
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#include <sys/user.h>
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#include <sys/ioctl.h>
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#include <sys/pcntl.h>
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#include <sys/thread.h>
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#include <sys/proc.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include <convex/vmparam.h>
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#include <convex/filehdr.h>
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#include <convex/opthdr.h>
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#include <convex/scnhdr.h>
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#include <convex/core.h>
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/* Per-thread data, read from the inferior at each stop and written
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back at each resume. */
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/* Number of active threads.
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Tables are valid for thread numbers less than this. */
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static int n_threads;
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#define MAXTHREADS 8
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/* Thread state. The remaining data is valid only if this is PI_TALIVE. */
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static int thread_state[MAXTHREADS];
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/* Stop pc, signal, signal subcode */
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static int thread_pc[MAXTHREADS];
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static int thread_signal[MAXTHREADS];
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static int thread_sigcode[MAXTHREADS];
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/* Thread registers.
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If thread is selected, the regs are in registers[] instead. */
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static char thread_regs[MAXTHREADS][REGISTER_BYTES];
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/* 1 if the top frame on the thread's stack was a context frame,
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meaning that the kernel is up to something and we should not
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touch the thread at all except to resume it. */
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static char thread_is_in_kernel[MAXTHREADS];
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/* The currently selected thread's number. */
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static int inferior_thread;
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/* Inferior process's file handle and a process control block
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to feed args to ioctl with. */
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static int inferior_fd;
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static struct pcntl ps;
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/* SOFF file headers for exec or core file. */
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static FILEHDR filehdr;
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static OPTHDR opthdr;
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static SCNHDR scnhdr;
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/* Address maps constructed from section headers of exec and core files.
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Defines process address -> file address translation. */
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struct pmap
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{
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long mem_addr; /* process start address */
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long mem_end; /* process end+1 address */
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long file_addr; /* file start address */
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long thread; /* -1 shared; 0,1,... thread-local */
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long type; /* S_TEXT S_DATA S_BSS S_TBSS etc */
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long which; /* used to sort map for info files */
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};
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static int n_exec, n_core;
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static struct pmap exec_map[100];
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static struct pmap core_map[100];
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/* Offsets in the core file of core_context and core_tcontext blocks. */
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static int context_offset;
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static int tcontext_offset[MAXTHREADS];
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/* Core file control blocks. */
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static struct core_context_v70 c;
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static struct core_tcontext_v70 tc;
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static struct user u;
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static thread_t th;
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static proc_t pr;
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/* The registers of the currently selected thread. */
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extern char registers[REGISTER_BYTES];
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/* Vector and communication registers from core dump or from inferior.
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These are read on demand, ie, not normally valid. */
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static struct vecst vector_registers;
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static struct creg_ctx comm_registers;
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/* Flag, set on a vanilla CONT command and cleared when the inferior
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is continued. */
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static int all_continue;
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/* Flag, set when the inferior is continued by a vanilla CONT command,
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cleared if it is continued for any other purpose. */
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static int thread_switch_ok;
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/* Stack of signals recieved from threads but not yet delivered to gdb. */
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struct threadpid
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{
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int pid;
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int thread;
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int signo;
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int subsig;
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int pc;
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};
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static struct threadpid signal_stack_bot[100];
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static struct threadpid *signal_stack = signal_stack_bot;
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/* How to detect empty stack -- bottom frame is all zero. */
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#define signal_stack_is_empty() (signal_stack->pid == 0)
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/* Mode controlled by SET PIPE command, controls the psw SEQ bit
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which forces each instruction to complete before the next one starts. */
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static int sequential = 0;
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/* Mode controlled by the SET PARALLEL command. Values are:
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0 concurrency limit 1 thread, dynamic scheduling
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1 no concurrency limit, dynamic scheduling
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2 no concurrency limit, fixed scheduling */
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static int parallel = 1;
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/* Mode controlled by SET BASE command, output radix for unformatted
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integer typeout, as in argument lists, aggregates, and so on.
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Zero means guess whether it's an address (hex) or not (decimal). */
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static int output_radix = 0;
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/* Signal subcode at last thread stop. */
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static int stop_sigcode;
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/* Hack, see wait() below. */
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static int exec_trap_timer;
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#include "gdbcmd.h"
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/* Nonzero if we are debugging an attached outside process
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rather than an inferior. */
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extern int attach_flag;
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static struct type *vector_type ();
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static long *read_vector_register ();
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static long *read_vector_register_1 ();
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static void write_vector_register ();
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static REGISTER_TYPE read_comm_register ();
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static void write_comm_register ();
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static void convex_cont_command ();
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static void thread_continue ();
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static void select_thread ();
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static void scan_stack ();
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static void set_fixed_scheduling ();
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static char *subsig_name ();
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static void psw_info ();
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static sig_noop ();
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static ptr_cmp ();
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/* Execute ptrace. Convex V7 replaced ptrace with pattach.
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Allow ptrace (0) as a no-op. */
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int
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call_ptrace (request, pid, procaddr, buf)
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int request, pid, procaddr, buf;
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{
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if (request == 0)
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return;
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error ("no ptrace");
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}
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/* Replacement for system execle routine.
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Convert it to an equivalent exect, which pattach insists on. */
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execle (name, argv)
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char *name, *argv;
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{
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char ***envp = (char ***) &argv;
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while (*envp++) ;
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signal (SIGTRAP, sig_noop);
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exect (name, &argv, *envp);
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}
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/* Stupid handler for stupid trace trap that otherwise causes
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startup to stupidly hang. */
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static sig_noop ()
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{}
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/* Read registers from inferior into registers[] array.
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For convex, they are already there, read in when the inferior stops. */
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void
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fetch_inferior_registers (regno)
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int regno;
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{
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}
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/* Store our register values back into the inferior.
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For Convex, do this only once, right before resuming inferior. */
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void
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store_inferior_registers (regno)
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int regno;
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{
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}
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/* Copy LEN bytes from inferior's memory starting at MEMADDR
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to debugger memory starting at MYADDR.
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On failure (cannot read from inferior, usually because address is out
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of bounds) returns the value of errno. */
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int
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read_inferior_memory (memaddr, myaddr, len)
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CORE_ADDR memaddr;
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char *myaddr;
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int len;
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{
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errno = 0;
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while (len > 0)
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{
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/* little-known undocumented max request size */
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int i = (len < 12288) ? len : 12288;
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lseek (inferior_fd, memaddr, 0);
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read (inferior_fd, myaddr, i);
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memaddr += i;
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myaddr += i;
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len -= i;
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}
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if (errno)
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bzero (myaddr, len);
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return errno;
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}
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/* Copy LEN bytes of data from debugger memory at MYADDR
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to inferior's memory at MEMADDR.
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Returns errno on failure (cannot write the inferior) */
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int
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write_inferior_memory (memaddr, myaddr, len)
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CORE_ADDR memaddr;
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char *myaddr;
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int len;
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{
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errno = 0;
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lseek (inferior_fd, memaddr, 0);
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write (inferior_fd, myaddr, len);
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return errno;
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}
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/* Here from create_inferior when the inferior process has been created
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and started up. We must do a pattach to grab it for debugging.
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Also, intercept the CONT command by altering its dispatch address. */
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create_inferior_hook (pid)
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int pid;
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{
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static char cont[] = "cont";
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static char cont1[] = "c";
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char *linep = cont;
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char *linep1 = cont1;
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char **line = &linep;
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char **line1 = &linep1;
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struct cmd_list_element *c;
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c = lookup_cmd (line, cmdlist, "", 0);
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c->function = convex_cont_command;
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c = lookup_cmd (line1, cmdlist, "", 0);
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c->function = convex_cont_command;
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inferior_fd = pattach (pid, O_EXCL);
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if (inferior_fd < 0)
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perror_with_name ("pattach");
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inferior_thread = 0;
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set_fixed_scheduling (pid, parallel == 2);
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}
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/* Attach process PID for debugging. */
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attach (pid)
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int pid;
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{
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int fd = pattach (pid, O_EXCL);
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if (fd < 0)
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perror_with_name ("pattach");
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attach_flag = 1;
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/* wait for strange kernel reverberations to go away */
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sleep (1);
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setpgrp (pid, pid);
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inferior_fd = fd;
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inferior_thread = 0;
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return pid;
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}
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/* Stop debugging the process whose number is PID
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and continue it with signal number SIGNAL.
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SIGNAL = 0 means just continue it. */
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void
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detach (signal)
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int signal;
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{
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signal_stack = signal_stack_bot;
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thread_continue (-1, 0, signal);
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ioctl (inferior_fd, PIXDETACH, &ps);
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close (inferior_fd);
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inferior_fd = 0;
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attach_flag = 0;
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}
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/* Kill off the inferior process. */
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kill_inferior ()
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{
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if (inferior_pid == 0)
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return;
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ioctl (inferior_fd, PIXTERMINATE, 0);
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wait (0);
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target_mourn_inferior ();
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}
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/* This is used when GDB is exiting. It gives less chance of error.*/
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kill_inferior_fast ()
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{
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if (inferior_pid == 0)
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return;
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ioctl (inferior_fd, PIXTERMINATE, 0);
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wait (0);
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}
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/* Read vector register REG, and return a pointer to the value. */
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static long *
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read_vector_register (reg)
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int reg;
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{
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if (have_inferior_p ())
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{
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errno = 0;
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ps.pi_buffer = (char *) &vector_registers;
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ps.pi_nbytes = sizeof vector_registers;
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ps.pi_offset = 0;
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ps.pi_thread = inferior_thread;
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ioctl (inferior_fd, PIXRDVREGS, &ps);
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if (errno)
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bzero (&vector_registers, sizeof vector_registers);
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}
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else if (corechan >= 0)
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{
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lseek (corechan, tcontext_offset[inferior_thread], 0);
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if (myread (corechan, &tc, sizeof tc) < 0)
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perror_with_name (corefile);
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lseek (corechan, tc.core_thread_p, 0);
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if (myread (corechan, &th, sizeof th) < 0)
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perror_with_name (corefile);
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lseek (corechan, tc.core_vregs_p, 0);
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if (myread (corechan, &vector_registers, 16*128) < 0)
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perror_with_name (corefile);
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vector_registers.vm[0] = th.t_vect_ctx.vc_vm[0];
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vector_registers.vm[1] = th.t_vect_ctx.vc_vm[1];
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vector_registers.vls = th.t_vect_ctx.vc_vls;
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}
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return read_vector_register_1 (reg);
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}
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/* Return a pointer to vector register REG, which must already have been
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fetched from the inferior or core file. */
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static long *
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read_vector_register_1 (reg)
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int reg;
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{
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switch (reg)
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{
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case VM_REGNUM:
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return (long *) vector_registers.vm;
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case VS_REGNUM:
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return (long *) &vector_registers.vls;
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case VL_REGNUM:
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return 1 + (long *) &vector_registers.vls;
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default:
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return (long *) &vector_registers.vr[reg];
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}
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}
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/* Write vector register REG, element ELEMENT, new value VAL.
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NB: must use read-modify-write on the entire vector state,
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since pattach does not do offsetted writes correctly. */
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static void
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write_vector_register (reg, element, val)
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int reg, element;
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REGISTER_TYPE val;
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{
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if (have_inferior_p ())
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{
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errno = 0;
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ps.pi_thread = inferior_thread;
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ps.pi_offset = 0;
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ps.pi_buffer = (char *) &vector_registers;
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ps.pi_nbytes = sizeof vector_registers;
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ioctl (inferior_fd, PIXRDVREGS, &ps);
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switch (reg)
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{
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case VL_REGNUM:
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vector_registers.vls =
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(vector_registers.vls & 0xffffffff00000000LL)
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+ (unsigned long) val;
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break;
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case VS_REGNUM:
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vector_registers.vls =
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(val << 32) + (unsigned long) vector_registers.vls;
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break;
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default:
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vector_registers.vr[reg].el[element] = val;
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break;
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}
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ioctl (inferior_fd, PIXWRVREGS, &ps);
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if (errno)
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perror_with_name ("writing vector register");
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}
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}
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/* Return the contents of communication register NUM. */
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static REGISTER_TYPE
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read_comm_register (num)
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int num;
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{
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if (have_inferior_p ())
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{
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ps.pi_buffer = (char *) &comm_registers;
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ps.pi_nbytes = sizeof comm_registers;
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ps.pi_offset = 0;
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ps.pi_thread = inferior_thread;
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ioctl (inferior_fd, PIXRDCREGS, &ps);
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}
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return comm_registers.crreg.r4[num];
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}
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/* Store a new value VAL into communication register NUM.
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NB: Must use read-modify-write on the whole comm register set
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since pattach does not do offsetted writes correctly. */
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static void
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write_comm_register (num, val)
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int num;
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REGISTER_TYPE val;
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{
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if (have_inferior_p ())
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{
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ps.pi_buffer = (char *) &comm_registers;
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ps.pi_nbytes = sizeof comm_registers;
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ps.pi_offset = 0;
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ps.pi_thread = inferior_thread;
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ioctl (inferior_fd, PIXRDCREGS, &ps);
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comm_registers.crreg.r4[num] = val;
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ioctl (inferior_fd, PIXWRCREGS, &ps);
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}
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}
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/* Resume execution of the inferior process.
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If STEP is nonzero, single-step it.
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If SIGNAL is nonzero, give it that signal. */
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void
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resume (step, signal)
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int step;
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int signal;
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{
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errno = 0;
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if (step || signal)
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thread_continue (inferior_thread, step, signal);
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else
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thread_continue (-1, 0, 0);
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}
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/* Maybe resume some threads.
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THREAD is which thread to resume, or -1 to resume them all.
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STEP and SIGNAL are as in resume.
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Global variable ALL_CONTINUE is set when we are here to do a
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`cont' command; otherwise we may be doing `finish' or a call or
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something else that will not tolerate an automatic thread switch.
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If there are stopped threads waiting to deliver signals, and
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ALL_CONTINUE, do not actually resume anything. gdb will do a wait
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and see one of the stopped threads in the queue. */
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static void
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thread_continue (thread, step, signal)
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int thread, step, signal;
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{
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int n;
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/* If we are to continue all threads, but not for the CONTINUE command,
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pay no attention and continue only the selected thread. */
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|
||
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);
|
||
|
||
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;
|
||
|
||
bcopy (registers, thread_regs[inferior_thread], REGISTER_BYTES);
|
||
ps.pi_thread = inferior_thread = thread;
|
||
if (have_inferior_p ())
|
||
ioctl (inferior_fd, PISETRWTID, &ps);
|
||
bcopy (thread_regs[thread], registers, 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 inferior 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 ();
|
||
set_current_frame (create_new_frame (read_register (FP_REGNUM),
|
||
read_pc ()));
|
||
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");
|
||
}
|