251 lines
6.4 KiB
C
251 lines
6.4 KiB
C
/* Machine-dependent code which would otherwise be in core.c
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for GDB, the GNU debugger. This code is for the HP PA-RISC cpu.
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Copyright 1986, 1987, 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
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Contributed by the Center for Software Science at the
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University of Utah (pa-gdb-bugs@cs.utah.edu).
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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 "frame.h"
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#include "inferior.h"
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#ifdef USG
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#include <sys/types.h>
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#endif
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#include <sys/param.h>
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#include <sys/dir.h>
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#include <signal.h>
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#include <sys/ioctl.h>
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/* #include <fcntl.h> Can we live without this? */
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#ifndef hpux
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#include <a.out.h>
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#include <machine/pcb.h>
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#include <sys/time.h>
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#include "/usr/src/sys/hpux/hpux.h"
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#define USRSTACK 0x68FF3000
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#else
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#include <sys/user.h> /* After a.out.h */
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#endif
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/ptrace.h>
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#ifndef hpux
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#undef USIZE
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#undef UPAGES
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#define USIZE 3
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#define UPAGES 7
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#endif
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extern int errno;
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/* File names of core file and executable file. */
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extern char *corefile;
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extern char *execfile;
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/* Descriptors on which core file and executable file are open.
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Note that the execchan is closed when an inferior is created
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and reopened if the inferior dies or is killed. */
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extern int corechan;
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extern int execchan;
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/* Last modification time of executable file.
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Also used in source.c to compare against mtime of a source file. */
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extern int exec_mtime;
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/* Virtual addresses of bounds of the two areas of memory in the core file. */
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extern CORE_ADDR data_start;
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extern CORE_ADDR data_end;
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extern CORE_ADDR stack_start;
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extern CORE_ADDR stack_end;
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/* Virtual addresses of bounds of two areas of memory in the exec file.
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Note that the data area in the exec file is used only when there is no core file. */
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extern CORE_ADDR text_start;
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extern CORE_ADDR text_end;
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extern CORE_ADDR exec_data_start;
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extern CORE_ADDR exec_data_end;
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/* Address in executable file of start of text area data. */
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extern int text_offset;
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/* Address in executable file of start of data area data. */
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extern int exec_data_offset;
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/* Address in core file of start of data area data. */
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extern int data_offset;
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/* Address in core file of start of stack area data. */
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extern int stack_offset;
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extern struct header file_hdr;
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extern struct som_exec_auxhdr exec_hdr;
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extern int (*core_file_hook)();
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#ifdef KERNELDEBUG
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extern int kernel_debugging;
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extern int kernel_core_file_hook();
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#endif
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core_file_command (filename, from_tty)
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char *filename;
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int from_tty;
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{
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int val;
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extern char registers[];
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#ifdef KERNELDEBUG
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struct stat stb;
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#endif
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/* Discard all vestiges of any previous core file
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and mark data and stack spaces as empty. */
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if (corefile)
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free (corefile);
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corefile = 0;
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core_file_hook = 0;
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if (corechan >= 0)
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close (corechan);
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corechan = -1;
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data_start = 0;
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data_end = 0;
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stack_start = STACK_END_ADDR;
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stack_end = STACK_END_ADDR;
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/* Now, if a new core file was specified, open it and digest it. */
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if (filename)
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{
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filename = tilde_expand (filename);
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make_cleanup (free, filename);
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if (have_inferior_p ())
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error ("To look at a core file, you must kill the inferior with \"kill\".");
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corechan = open (filename, O_RDONLY, 0);
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if (corechan < 0)
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perror_with_name (filename);
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#ifdef KERNELDEBUG
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fstat(corechan, &stb);
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if (kernel_debugging) {
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setup_kernel_debugging();
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core_file_hook = kernel_core_file_hook;
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set_kernel_boundaries();
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} else if ((stb.st_mode & S_IFMT) == S_IFCHR &&
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stb.st_rdev == makedev(2, 1)) {
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/* looking at /dev/kmem */
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data_offset = data_start = KERNBASE;
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data_end = ~0; /* XXX */
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stack_end = stack_start = data_end;
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set_kernel_boundaries();
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} else
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#endif
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{
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/* HP PA-RISC style corefile. */
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#ifndef hpux
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struct hpuxuser u;
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#else
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struct user u;
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#endif
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unsigned int reg_offset;
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val = myread (corechan, &u, sizeof u);
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if (val < 0)
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perror_with_name ("Not a core file: reading upage");
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if (val != sizeof u)
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error ("Not a core file: could only read %d bytes", val);
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/* We are depending on exec_file_command having been called
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previously to set exec_data_start. Since the executable
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and the core file share the same text segment, the address
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of the data segment will be the same in both. */
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data_start = exec_data_start;
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data_end = data_start + NBPG * u.u_dsize;
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stack_start = USRSTACK; /* from sys/param.h */
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stack_end = stack_start + NBPG * u.u_ssize;
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data_offset = NBPG * UPAGES;
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stack_offset = NBPG * (UPAGES + u.u_dsize);
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/* Some machines put an absolute address in here and some put
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the offset in the upage of the regs. */
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reg_offset = NBPG * USIZE;
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/* Read the register values out of the core file and store
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them where `read_register' will find them. */
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{
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register int regno;
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for (regno = 0; regno < NUM_REGS; regno++)
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{
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unsigned char buf[MAX_REGISTER_RAW_SIZE];
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val = lseek (corechan, register_addr (regno, reg_offset), 0);
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if (val < 0
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|| (val = myread (corechan, buf, sizeof buf)) < 0)
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{
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char * buffer = (char *) alloca (strlen (reg_names[regno])
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+ 30);
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strcpy (buffer, "Reading register ");
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strcat (buffer, reg_names[regno]);
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perror_with_name (buffer);
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}
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if (regno == PCOQ_HEAD_REGNUM || regno == PCOQ_TAIL_REGNUM)
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buf[3] &= ~0x3;
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supply_register (regno, buf);
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}
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}
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}
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if (filename[0] == '/')
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corefile = savestring (filename, strlen (filename));
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else
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{
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corefile = concat (current_directory, "/", filename);
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}
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set_current_frame ( create_new_frame (read_register (FP_REGNUM),
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read_pc ()));
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select_frame (get_current_frame (), 0);
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validate_files ();
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}
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else if (from_tty)
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printf ("No core file now.\n");
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}
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