binutils-gdb/gdb/m88k-xdep.c

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/* Copyright (C) 1988, 1990 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <stdio.h>
#include "defs.h"
#include "param.h"
#include "frame.h"
#include "inferior.h"
#ifdef USG
#include <sys/types.h>
#endif
#include <sys/param.h>
#include <sys/dir.h>
#include <signal.h>
#include "gdbcore.h"
#include <sys/user.h>
#ifndef USER /* added to support BCS ptrace_user */
#define USER ptrace_user
#endif
#include <sys/ioctl.h>
#include <fcntl.h>
#ifdef COFF_ENCAPSULATE
#include "a.out.encap.h"
#else
#include <a.out.h>
#endif
#include <sys/file.h>
#include <sys/stat.h>
#include "symtab.h"
#include "setjmp.h"
#include "value.h"
/* define offsets to the pc instruction offsets in ptrace_user struct */
#define SXIP_OFFSET (char *)&u.pt_sigframe.dg_sigframe.sc_sxip - \
(char *)&u
#define SNIP_OFFSET (char *)&u.pt_sigframe.dg_sigframe.sc_snip - \
(char *)&u
#define SFIP_OFFSET (char *)&u.pt_sigframe.dg_sigframe.sc_sfip - (char *)&u
extern int have_symbol_file_p();
extern jmp_buf stack_jmp;
extern int errno;
extern char registers[REGISTER_BYTES];
void
fetch_inferior_registers ()
{
register int regno;
register unsigned int regaddr;
char buf[MAX_REGISTER_RAW_SIZE];
register int i;
struct USER u;
unsigned int offset;
offset = (char *) &u.pt_r0 - (char *) &u;
regaddr = offset; /* byte offset to r0;*/
/* offset = ptrace (3, inferior_pid, offset, 0) - KERNEL_U_ADDR; */
for (regno = 0; regno < NUM_REGS; regno++)
{
/*regaddr = register_addr (regno, offset);*/
/* 88k enhancement */
for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
{
*(int *) &buf[i] = ptrace (3, inferior_pid, regaddr, 0);
regaddr += sizeof (int);
}
supply_register (regno, buf);
}
/* now load up registers 36 - 38; special pc registers */
*(int *) &buf[0] = ptrace (3,inferior_pid,(char *)&u.pt_sigframe.dg_sigframe.sc_sxip - (char *)&u ,0);
supply_register (SXIP_REGNUM, buf);
*(int *) &buf[0] = ptrace (3, inferior_pid, (char *)&u.pt_sigframe.dg_sigframe.sc_snip - (char *)&u ,0);
supply_register (SNIP_REGNUM, buf);
*(int *) &buf[0] = ptrace (3, inferior_pid, (char *)&u.pt_sigframe.dg_sigframe.sc_sfip - (char *)&u ,0);
supply_register (SFIP_REGNUM, buf);
}
/* Store our register values back into the inferior.
If REGNO is -1, do this for all registers.
Otherwise, REGNO specifies which register (so we can save time). */
store_inferior_registers (regno)
int regno;
{
register unsigned int regaddr;
char buf[80];
struct USER u;
#if defined(BCS)
#if defined(DGUX)
unsigned int offset = (char *) &u.pt_r0 - (char *) &u;
#endif /* defined (DGUX) */
#else
unsigned int offset = (char *) &u.pt_r0 - (char *) &u;
#endif /* defined(BCS) */
/* offset = ptrace (3, inferior_pid, offset, 0) - KERNEL_U_ADDR; */
regaddr = offset;
if (regno >= 0)
{
/* regaddr = register_addr (regno, offset); */
if (regno < PC_REGNUM)
{
regaddr = offset + regno * sizeof (int);
errno = 0;
ptrace (6, inferior_pid, regaddr, read_register (regno));
if (errno != 0)
{
sprintf (buf, "writing register number %d", regno);
perror_with_name (buf);
}
}
else if (regno == SXIP_REGNUM)
ptrace (6, inferior_pid, SXIP_OFFSET, read_register(regno));
else if (regno == SNIP_REGNUM)
ptrace (6, inferior_pid, SNIP_OFFSET, read_register(regno));
else if (regno == SFIP_REGNUM)
ptrace (6, inferior_pid, SFIP_OFFSET, read_register(regno));
else printf ("Bad register number for store_inferior routine\n");
}
else {
for (regno = 0; regno < NUM_REGS - 3; regno++)
{
/* regaddr = register_addr (regno, offset); */
errno = 0;
regaddr = offset + regno * sizeof (int);
ptrace (6, inferior_pid, regaddr, read_register (regno));
if (errno != 0)
{
sprintf (buf, "writing register number %d", regno);
perror_with_name (buf);
}
}
ptrace (6,inferior_pid,SXIP_OFFSET,read_register(SXIP_REGNUM));
ptrace (6,inferior_pid,SNIP_OFFSET,read_register(SNIP_REGNUM));
ptrace (6,inferior_pid,SFIP_OFFSET,read_register(SFIP_REGNUM));
}
}
#if 0
/* Core files are now a function of BFD. */
void
core_file_command (filename, from_tty)
char *filename;
int from_tty;
{
int val;
extern char registers[];
/* Need symbol file and one with tdesc info for corefiles to work */
if (!have_symbol_file_p())
error ("Requires symbol-file and exec-file");
if (!execfile)
error ("Requires exec-file and symbol-file");
/* 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;
/* 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);
/* 4.2-style (and perhaps also sysV-style) core dump file. */
{
struct USER u;
int reg_offset;
val = myread (corechan, &u, sizeof u);
if (val < 0)
perror_with_name (filename);
data_start = u.pt_o_data_start;
data_end = data_start + u.pt_dsize;
stack_start = stack_end - u.pt_ssize;
data_offset = u.pt_dataptr;
stack_offset = data_offset + u.pt_dsize;
#if defined(BCS)
#if defined(DGUX)
reg_offset = 2048;
#endif /* defined (DGUX) */
#else
/* original code: */
reg_offset = (int) u.pt_r0 - KERNEL_U_ADDR;
#endif /* defined(BCS) */
/* I don't know where to find this info.
So, for now, mark it as not available. */
/* N_SET_MAGIC (core_aouthdr, 0); */
bzero ((char *) &core_aouthdr, sizeof core_aouthdr);
/* Read the register values out of the core file and store
them where `read_register' will find them. */
{
register int regno;
for (regno = 0; regno < NUM_REGS; regno++)
{
char buf[MAX_REGISTER_RAW_SIZE];
val = lseek (corechan, register_addr (regno, reg_offset), 0);
if (val < 0)
perror_with_name (filename);
val = myread (corechan, buf, sizeof buf);
if (val < 0)
perror_with_name (filename);
supply_register (regno, buf);
}
}
}
if (filename[0] == '/')
corefile = savestring (filename, strlen (filename));
else
{
corefile = concat (current_directory, "/", filename);
}
init_tdesc();
current_context = init_dcontext();
set_current_frame ( create_new_frame(get_frame_base (read_pc()),
read_pc ()));
select_frame (get_current_frame (), 0);
validate_files ();
}
else if (from_tty)
printf ("No core file now.\n");
}
#endif
/* blockend is the address of the end of the user structure */
m88k_register_u_addr (blockend, regnum)
{
struct USER u;
int ustart = blockend - sizeof (struct USER);
switch (regnum)
{
case 0:
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
case 8:
case 9:
case 10:
case 11:
case 12:
case 13:
case 14:
case 15:
case 16:
case 17:
case 18:
case 19:
case 20:
case 21:
case 22:
case 23:
case 24:
case 25:
case 26:
case 27:
case 28:
case 29:
case 30:
case 31: return (ustart + ((int) &u.pt_r0 - (int) &u) + sizeof(REGISTER_TYPE) * regnum);
case PSR_REGNUM: return (ustart + ((int) &u.pt_psr - (int) &u));
case FPSR_REGNUM: return (ustart + ((int) &u.pt_fpsr - (int) &u));
case FPCR_REGNUM: return (ustart + ((int) &u.pt_fpcr - (int) &u));
case SXIP_REGNUM: return (ustart + SXIP_OFFSET);
case SNIP_REGNUM: return (ustart + SNIP_OFFSET);
case SFIP_REGNUM: return (ustart + SFIP_OFFSET);
default: return (blockend + sizeof (REGISTER_TYPE) * regnum);
}
}