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binutils-gdb/gdb/m88k-nat.c

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/* Native-dependent Motorola 88xxx support for GDB, the GNU Debugger.
Copyright 1988, 1990, 1991, 1992 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "frame.h"
#include "inferior.h"
#include <sys/types.h>
#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>
#include <sys/file.h>
#include "gdb_stat.h"
#include "symtab.h"
#include "setjmp.h"
#include "value.h"
#ifdef DELTA88
#include <sys/ptrace.h>
/* define offsets to the pc instruction offsets in ptrace_user struct */
#define SXIP_OFFSET ((char *)&u.pt_sigframe.sig_sxip - (char *)&u)
#define SNIP_OFFSET ((char *)&u.pt_sigframe.sig_snip - (char *)&u)
#define SFIP_OFFSET ((char *)&u.pt_sigframe.sig_sfip - (char *)&u)
#else
/* 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)
#endif
extern int have_symbol_file_p ();
extern jmp_buf stack_jmp;
extern int errno;
void
fetch_inferior_registers (regno)
int regno; /* Original value discarded */
{
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, (PTRACE_ARG3_TYPE) 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,
(PTRACE_ARG3_TYPE) 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,
(PTRACE_ARG3_TYPE) SXIP_OFFSET, 0);
supply_register (SXIP_REGNUM, buf);
*(int *) &buf[0] = ptrace (3, inferior_pid,
(PTRACE_ARG3_TYPE) SNIP_OFFSET, 0);
supply_register (SNIP_REGNUM, buf);
*(int *) &buf[0] = ptrace (3, inferior_pid,
(PTRACE_ARG3_TYPE) SFIP_OFFSET, 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). */
void
store_inferior_registers (regno)
int regno;
{
register unsigned int regaddr;
char buf[80];
struct USER u;
unsigned int offset = (char *) &u.pt_r0 - (char *) &u;
regaddr = offset;
/* Don't try to deal with EXIP_REGNUM or ENIP_REGNUM, because I think either
svr3 doesn't run on an 88110, or the kernel isolates the different (not
completely sure this is true, but seems to be. */
if (regno >= 0)
{
/* regaddr = register_addr (regno, offset); */
if (regno < PC_REGNUM)
{
regaddr = offset + regno * sizeof (int);
errno = 0;
ptrace (6, inferior_pid,
(PTRACE_ARG3_TYPE) 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,
(PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register (regno));
else if (regno == SNIP_REGNUM)
ptrace (6, inferior_pid,
(PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register (regno));
else if (regno == SFIP_REGNUM)
ptrace (6, inferior_pid,
(PTRACE_ARG3_TYPE) SFIP_OFFSET, read_register (regno));
else
printf_unfiltered ("Bad register number for store_inferior routine\n");
}
else
{
for (regno = 0; regno < PC_REGNUM; regno++)
{
/* regaddr = register_addr (regno, offset); */
errno = 0;
regaddr = offset + regno * sizeof (int);
ptrace (6, inferior_pid,
(PTRACE_ARG3_TYPE) regaddr, read_register (regno));
if (errno != 0)
{
sprintf (buf, "writing register number %d", regno);
perror_with_name (buf);
}
}
ptrace (6, inferior_pid,
(PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register (SXIP_REGNUM));
ptrace (6, inferior_pid,
(PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register (SNIP_REGNUM));
ptrace (6, inferior_pid,
(PTRACE_ARG3_TYPE) SFIP_OFFSET, read_register (SFIP_REGNUM));
}
}
/* 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) + REGISTER_SIZE * 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:
if (regnum < NUM_REGS)
/* The register is one of those which is not defined...
give it zero */
return (ustart + ((int) &u.pt_r0 - (int) &u));
else
return (blockend + REGISTER_SIZE * regnum);
}
}
#ifdef USE_PROC_FS
#include <sys/procfs.h>
/* Given a pointer to a general register set in /proc format (gregset_t *),
unpack the register contents and supply them as gdb's idea of the current
register values. */
void
supply_gregset (gregsetp)
gregset_t *gregsetp;
{
register int regi;
register greg_t *regp = (greg_t *) gregsetp;
for (regi = 0; regi <= SP_REGNUM; regi++)
supply_register (regi, (char *) (regp + regi));
supply_register (SXIP_REGNUM, (char *) (regp + R_XIP));
supply_register (SNIP_REGNUM, (char *) (regp + R_NIP));
supply_register (SFIP_REGNUM, (char *) (regp + R_FIP));
supply_register (PSR_REGNUM, (char *) (regp + R_PSR));
supply_register (FPSR_REGNUM, (char *) (regp + R_FPSR));
supply_register (FPCR_REGNUM, (char *) (regp + R_FPCR));
}
void
fill_gregset (gregsetp, regno)
gregset_t *gregsetp;
int regno;
{
int regi;
register greg_t *regp = (greg_t *) gregsetp;
for (regi = 0; regi <= R_R31; regi++)
if ((regno == -1) || (regno == regi))
*(regp + regi) = *(int *) &registers[REGISTER_BYTE (regi)];
if ((regno == -1) || (regno == SXIP_REGNUM))
*(regp + R_XIP) = *(int *) &registers[REGISTER_BYTE (SXIP_REGNUM)];
if ((regno == -1) || (regno == SNIP_REGNUM))
*(regp + R_NIP) = *(int *) &registers[REGISTER_BYTE (SNIP_REGNUM)];
if ((regno == -1) || (regno == SFIP_REGNUM))
*(regp + R_FIP) = *(int *) &registers[REGISTER_BYTE (SFIP_REGNUM)];
if ((regno == -1) || (regno == PSR_REGNUM))
*(regp + R_PSR) = *(int *) &registers[REGISTER_BYTE (PSR_REGNUM)];
if ((regno == -1) || (regno == FPSR_REGNUM))
*(regp + R_FPSR) = *(int *) &registers[REGISTER_BYTE (FPSR_REGNUM)];
if ((regno == -1) || (regno == FPCR_REGNUM))
*(regp + R_FPCR) = *(int *) &registers[REGISTER_BYTE (FPCR_REGNUM)];
}
#endif /* USE_PROC_FS */
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