331 lines
8.7 KiB
C
331 lines
8.7 KiB
C
/* Host-dependent Motorola 88xxx support for GDB, the GNU Debugger.
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Copyright 1988, 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 <stdio.h>
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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 "gdbcore.h"
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#include <sys/user.h>
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#ifndef USER /* added to support BCS ptrace_user */
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#define USER ptrace_user
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#endif
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include "symtab.h"
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#include "setjmp.h"
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#include "value.h"
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#ifdef DELTA88
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#include <sys/ptrace.h>
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/* define offsets to the pc instruction offsets in ptrace_user struct */
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#define SXIP_OFFSET (char *)&u.pt_sigframe.sig_sxip - (char *)&u
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#define SNIP_OFFSET (char *)&u.pt_sigframe.sig_snip - (char *)&u
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#define SFIP_OFFSET (char *)&u.pt_sigframe.sig_sfip - (char *)&u
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#else
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/* define offsets to the pc instruction offsets in ptrace_user struct */
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#define SXIP_OFFSET (char *)&u.pt_sigframe.dg_sigframe.sc_sxip - (char *)&u
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#define SNIP_OFFSET (char *)&u.pt_sigframe.dg_sigframe.sc_snip - (char *)&u
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#define SFIP_OFFSET (char *)&u.pt_sigframe.dg_sigframe.sc_sfip - (char *)&u
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#endif
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extern int have_symbol_file_p();
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extern jmp_buf stack_jmp;
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extern int errno;
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extern char registers[REGISTER_BYTES];
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void
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fetch_inferior_registers ()
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{
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register int regno;
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register unsigned int regaddr;
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char buf[MAX_REGISTER_RAW_SIZE];
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register int i;
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struct USER u;
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unsigned int offset;
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offset = (char *) &u.pt_r0 - (char *) &u;
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regaddr = offset; /* byte offset to r0;*/
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/* offset = ptrace (3, inferior_pid, offset, 0) - KERNEL_U_ADDR; */
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for (regno = 0; regno < NUM_REGS; regno++)
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{
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/*regaddr = register_addr (regno, offset);*/
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/* 88k enhancement */
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for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
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{
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*(int *) &buf[i] = ptrace (3, inferior_pid, regaddr, 0);
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regaddr += sizeof (int);
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}
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supply_register (regno, buf);
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}
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/* now load up registers 36 - 38; special pc registers */
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*(int *) &buf[0] = ptrace (3,inferior_pid,SXIP_OFFSET ,0);
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supply_register (SXIP_REGNUM, buf);
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*(int *) &buf[0] = ptrace (3, inferior_pid,SNIP_OFFSET,0);
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supply_register (SNIP_REGNUM, buf);
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*(int *) &buf[0] = ptrace (3, inferior_pid,SFIP_OFFSET,0);
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supply_register (SFIP_REGNUM, buf);
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}
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/* Store our register values back into the inferior.
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If REGNO is -1, do this for all registers.
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Otherwise, REGNO specifies which register (so we can save time). */
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store_inferior_registers (regno)
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int regno;
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{
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register unsigned int regaddr;
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char buf[80];
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struct USER u;
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unsigned int offset = (char *) &u.pt_r0 - (char *) &u;
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regaddr = offset;
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if (regno >= 0)
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{
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/* regaddr = register_addr (regno, offset); */
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if (regno < PC_REGNUM)
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{
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regaddr = offset + regno * sizeof (int);
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errno = 0;
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ptrace (6, inferior_pid, regaddr, read_register (regno));
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if (errno != 0)
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{
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sprintf (buf, "writing register number %d", regno);
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perror_with_name (buf);
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}
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}
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else if (regno == SXIP_REGNUM)
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ptrace (6, inferior_pid, SXIP_OFFSET, read_register(regno));
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else if (regno == SNIP_REGNUM)
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ptrace (6, inferior_pid, SNIP_OFFSET, read_register(regno));
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else if (regno == SFIP_REGNUM)
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ptrace (6, inferior_pid, SFIP_OFFSET, read_register(regno));
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else printf ("Bad register number for store_inferior routine\n");
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}
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else {
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for (regno = 0; regno < NUM_REGS - 3; regno++)
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{
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/* regaddr = register_addr (regno, offset); */
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errno = 0;
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regaddr = offset + regno * sizeof (int);
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ptrace (6, inferior_pid, regaddr, read_register (regno));
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if (errno != 0)
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{
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sprintf (buf, "writing register number %d", regno);
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perror_with_name (buf);
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}
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}
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ptrace (6,inferior_pid,SXIP_OFFSET,read_register(SXIP_REGNUM));
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ptrace (6,inferior_pid,SNIP_OFFSET,read_register(SNIP_REGNUM));
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ptrace (6,inferior_pid,SFIP_OFFSET,read_register(SFIP_REGNUM));
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}
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}
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#if 0
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/* Core files are now a function of BFD. */
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void
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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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/* Need symbol file and one with tdesc info for corefiles to work */
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if (!have_symbol_file_p())
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error ("Requires symbol-file and exec-file");
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if (!execfile)
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error ("Requires exec-file and symbol-file");
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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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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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/* 4.2-style (and perhaps also sysV-style) core dump file. */
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{
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struct USER u;
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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 (filename);
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data_start = u.pt_o_data_start;
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data_end = data_start + u.pt_dsize;
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stack_start = stack_end - u.pt_ssize;
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data_offset = u.pt_dataptr;
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stack_offset = data_offset + u.pt_dsize;
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#if defined(BCS)
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#if defined(DGUX)
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reg_offset = 2048;
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#endif /* defined (DGUX) */
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#else
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/* original code: */
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reg_offset = (int) u.pt_r0 - KERNEL_U_ADDR;
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#endif /* defined(BCS) */
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/* I don't know where to find this info.
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So, for now, mark it as not available. */
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/* N_SET_MAGIC (core_aouthdr, 0); */
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bzero ((char *) &core_aouthdr, sizeof core_aouthdr);
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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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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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perror_with_name (filename);
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val = myread (corechan, buf, sizeof buf);
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if (val < 0)
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perror_with_name (filename);
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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, NULL);
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}
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init_tdesc();
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current_context = init_dcontext();
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set_current_frame ( create_new_frame(get_frame_base (read_pc()),
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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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#endif
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/* blockend is the address of the end of the user structure */
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m88k_register_u_addr (blockend, regnum)
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{
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struct USER u;
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int ustart = blockend - sizeof (struct USER);
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switch (regnum)
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{
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case 0:
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case 1:
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case 2:
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case 3:
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case 4:
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case 5:
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case 6:
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case 7:
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case 8:
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case 9:
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case 10:
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case 11:
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case 12:
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case 13:
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case 14:
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case 15:
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case 16:
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case 17:
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case 18:
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case 19:
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case 20:
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case 21:
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case 22:
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case 23:
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case 24:
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case 25:
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case 26:
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case 27:
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case 28:
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case 29:
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case 30:
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case 31: return (ustart + ((int) &u.pt_r0 - (int) &u) + sizeof(REGISTER_TYPE) * regnum);
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case PSR_REGNUM: return (ustart + ((int) &u.pt_psr - (int) &u));
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case FPSR_REGNUM: return (ustart + ((int) &u.pt_fpsr - (int) &u));
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case FPCR_REGNUM: return (ustart + ((int) &u.pt_fpcr - (int) &u));
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case SXIP_REGNUM: return (ustart + SXIP_OFFSET);
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case SNIP_REGNUM: return (ustart + SNIP_OFFSET);
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case SFIP_REGNUM: return (ustart + SFIP_OFFSET);
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default: return (blockend + sizeof (REGISTER_TYPE) * regnum);
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}
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}
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