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/* Native support for Motorola 88k running Harris CX/UX.

   Copyright 1988, 1990, 1991, 1992, 1993, 1994 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>

#include "bfd.h"

#include "symfile.h"

#include "objfiles.h"

#include "symtab.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"

#include <sys/ptrace.h>

/* CX/UX provides them already, but as word offsets instead of char offsets */

#define SXIP_OFFSET (PT_SXIP * 4)

#define SNIP_OFFSET (PT_SNIP * 4)

#define SFIP_OFFSET (PT_SFIP * 4)

#define PSR_OFFSET  (PT_PSR  * sizeof(int))

#define FPSR_OFFSET (PT_FPSR * sizeof(int))

#define FPCR_OFFSET (PT_FPCR * sizeof(int))

#define XREGADDR(r) (((char *)&u.pt_x0-(char *)&u) + \

                     ((r)-X0_REGNUM)*sizeof(X_REGISTER_RAW_TYPE))

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 < PC_REGNUM; 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 32-37; special pc registers */

  *(int *) &buf[0] = ptrace (3, inferior_pid,

                             (PTRACE_ARG3_TYPE) PSR_OFFSET, 0);

  supply_register (PSR_REGNUM, buf);

  *(int *) &buf[0] = ptrace (3, inferior_pid,

                             (PTRACE_ARG3_TYPE) FPSR_OFFSET, 0);

  supply_register (FPSR_REGNUM, buf);

  *(int *) &buf[0] = ptrace (3, inferior_pid,

                             (PTRACE_ARG3_TYPE) FPCR_OFFSET, 0);

  supply_register (FPCR_REGNUM, buf);

  *(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);

  if (target_is_m88110)

    {

      for (regaddr = XREGADDR (X0_REGNUM), regno = X0_REGNUM;

           regno < NUM_REGS;

           regno++, regaddr += 16)

        {

          X_REGISTER_RAW_TYPE xval;

          *(int *) &xval.w1 = ptrace (3, inferior_pid,

                                      (PTRACE_ARG3_TYPE) regaddr, 0);

          *(int *) &xval.w2 = ptrace (3, inferior_pid,

                                      (PTRACE_ARG3_TYPE) (regaddr + 4), 0);

          *(int *) &xval.w3 = ptrace (3, inferior_pid,

                                      (PTRACE_ARG3_TYPE) (regaddr + 8), 0);

          *(int *) &xval.w4 = ptrace (3, inferior_pid,

                                      (PTRACE_ARG3_TYPE) (regaddr + 12), 0);

          supply_register (regno, (void *) &xval);

        }

    }

}

/* 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 == PSR_REGNUM)

        ptrace (6, inferior_pid,

                (PTRACE_ARG3_TYPE) PSR_OFFSET, read_register (regno));

      else if (regno == FPSR_REGNUM)

        ptrace (6, inferior_pid,

                (PTRACE_ARG3_TYPE) FPSR_OFFSET, read_register (regno));

      else if (regno == FPCR_REGNUM)

        ptrace (6, inferior_pid,

                (PTRACE_ARG3_TYPE) FPCR_OFFSET, read_register (regno));

      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 if (target_is_m88110 && regno < NUM_REGS)

        {

          X_REGISTER_RAW_TYPE xval;

          read_register_bytes (REGISTER_BYTE (regno), (char *) &xval,

                               sizeof (X_REGISTER_RAW_TYPE));

          regaddr = XREGADDR (regno);

          ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, xval.w1);

          ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr + 4, xval.w2);

          ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr + 8, xval.w3);

          ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr + 12, xval.w4);

        }

      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) PSR_OFFSET, read_register (regno));

      ptrace (6, inferior_pid,

              (PTRACE_ARG3_TYPE) FPSR_OFFSET, read_register (regno));

      ptrace (6, inferior_pid,

              (PTRACE_ARG3_TYPE) FPCR_OFFSET, read_register (regno));

      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));

      if (target_is_m88110)

        {

          for (regno = X0_REGNUM; regno < NUM_REGS; regno++)

            {

              X_REGISTER_RAW_TYPE xval;

              read_register_bytes (REGISTER_BYTE (regno), (char *) &xval,

                                   sizeof (X_REGISTER_RAW_TYPE));

              regaddr = XREGADDR (regno);

              ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, xval.w1);

              ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) (regaddr + 4), xval.w2);

              ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) (regaddr + 8), xval.w3);

              ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) (regaddr + 12), xval.w4);

            }

        }

    }

}

/* blockend is the address of the end of the user structure */

m88k_register_u_addr (blockend, regnum)

     int blockend, regnum;

{

  struct USER u;

  int ustart = blockend - sizeof (struct USER);

  if (regnum < PSR_REGNUM)

    return (ustart + ((int) &u.pt_r0 - (int) &u) +

            REGISTER_SIZE * regnum);

  else if (regnum == PSR_REGNUM)

    return (ustart + ((int) &u.pt_psr) - (int) &u);

  else if (regnum == FPSR_REGNUM)

    return (ustart + ((int) &u.pt_fpsr) - (int) &u);

  else if (regnum == FPCR_REGNUM)

    return (ustart + ((int) &u.pt_fpcr) - (int) &u);

  else if (regnum == SXIP_REGNUM)

    return (ustart + SXIP_OFFSET);

  else if (regnum == SNIP_REGNUM)

    return (ustart + SNIP_OFFSET);

  else if (regnum == SFIP_REGNUM)

    return (ustart + SFIP_OFFSET);

  else if (target_is_m88110)

    return (ustart + ((int) &u.pt_x0 - (int) &u) +      /* Must be X register */

            sizeof (u.pt_x0) * (regnum - X0_REGNUM));

  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 */

/* This support adds the equivalent of adb's % command.  When

   the `add-shared-symbol-files' command is given, this routine scans

   the dynamic linker's link map and reads the minimal symbols

   from each shared object file listed in the map. */

struct link_map

{

  unsigned long l_addr;         /* address at which object is mapped */

  char *l_name;                 /* full name of loaded object */

  void *l_ld;                   /* dynamic structure of object */

  struct link_map *l_next;      /* next link object */

  struct link_map *l_prev;      /* previous link object */

};

#define LINKS_MAP_POINTER "_ld_tail"

#define LIBC_FILE "/usr/lib/libc.so.1"

#define SHARED_OFFSET 0xf0001000

#ifndef PATH_MAX

#define PATH_MAX 1023           /* maximum size of path name on OS */

#endif

void

add_shared_symbol_files ()

{

  void *desc;

  struct link_map *ld_map, *lm, lms;

  struct minimal_symbol *minsym;

  struct objfile *objfile;

  char *path_name;

  if (!inferior_pid)

    {

      warning ("The program has not yet been started.");

      return;

    }

  objfile = symbol_file_add (LIBC_FILE, 0, NULL, 0, OBJF_READNOW);

  minsym = lookup_minimal_symbol (LINKS_MAP_POINTER, objfile);

  ld_map = (struct link_map *)

    read_memory_integer (((int) SYMBOL_VALUE_ADDRESS (minsym) + SHARED_OFFSET), 4);

  lm = ld_map;

  while (lm)

    {

      int local_errno = 0;

      read_memory ((CORE_ADDR) lm, (char *) &lms, sizeof (struct link_map));

      if (lms.l_name)

        {

          if (target_read_string ((CORE_ADDR) lms.l_name, &path_name,

                                  PATH_MAX, &local_errno))

            {

              struct section_addr_info section_addrs;

              memset (&section_addrs, 0, sizeof (section_addrs));

              section_addrs.text_addr = lms.l_addr;

              symbol_file_add (path_name, 1, &section_addrs, 0, 0);

              free (path_name);

            }

        }

      /* traverse links in reverse order so that we get the

         the symbols the user actually gets. */

      lm = lms.l_prev;

    }

  /* Getting new symbols may change our opinion about what is

     frameless.  */

  reinit_frame_cache ();

}

#if defined(_ES_MP)

#include <sys/regset.h>

unsigned int

m88k_harris_core_register_addr (regno, reg_ptr)

     int regno, reg_ptr;

{

  unsigned int word_offset;

  switch (regno)

    {

    case PSR_REGNUM:

      word_offset = R_EPSR;

      break;

    case FPSR_REGNUM:

      word_offset = R_FPSR;

      break;

    case FPCR_REGNUM:

      word_offset = R_FPCR;

      break;

    case SXIP_REGNUM:

      word_offset = R_EXIP;

      break;

    case SNIP_REGNUM:

      word_offset = R_ENIP;

      break;

    case SFIP_REGNUM:

      word_offset = R_EFIP;

      break;

    default:

      if (regno <= FP_REGNUM)

        word_offset = regno;

      else

        word_offset = ((regno - X0_REGNUM) * 4);

    }

  return (word_offset * 4);

}

#endif /* _ES_MP */

void

_initialize_m88k_nat ()

{

#ifdef _ES_MP

  /* Enable 88110 support, as we don't support the 88100 under ES/MP.  */

  target_is_m88110 = 1;

#elif defined(_CX_UX)

  /* Determine whether we're running on an 88100 or an 88110.  */

  target_is_m88110 = (sinfo (SYSMACHINE, 0) == SYS5800);

#endif /* _CX_UX */

}

#ifdef _ES_MP

/* 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 < R_R31; regi++)

    {

      supply_register (regi, (char *) (regp + regi));

    }

  supply_register (PSR_REGNUM, (char *) (regp + R_EPSR));

  supply_register (FPSR_REGNUM, (char *) (regp + R_FPSR));

  supply_register (FPCR_REGNUM, (char *) (regp + R_FPCR));

  supply_register (SXIP_REGNUM, (char *) (regp + R_EXIP));

  supply_register (SNIP_REGNUM, (char *) (regp + R_ENIP));

  supply_register (SFIP_REGNUM, (char *) (regp + R_EFIP));

}

/* Given a pointer to a floating point register set in /proc format

   (fpregset_t *), unpack the register contents and supply them as gdb's

   idea of the current floating point register values.  */

void

supply_fpregset (fpregsetp)

     fpregset_t *fpregsetp;

{

  register int regi;

  char *from;

  for (regi = FP0_REGNUM; regi <= FPLAST_REGNUM; regi++)

    {

      from = (char *) &((*fpregsetp)[regi - FP0_REGNUM]);

      supply_register (regi, from);

    }

}

#endif /* _ES_MP */

#ifdef _CX_UX

#include <sys/regset.h>

unsigned int

m88k_harris_core_register_addr (int regno, int reg_ptr)

{

  unsigned int word_offset;

  switch (regno)

    {

    case PSR_REGNUM:

      word_offset = R_PSR;

      break;

    case FPSR_REGNUM:

      word_offset = R_FPSR;

      break;

    case FPCR_REGNUM:

      word_offset = R_FPCR;

      break;

    case SXIP_REGNUM:

      word_offset = R_XIP;

      break;

    case SNIP_REGNUM:

      word_offset = R_NIP;

      break;

    case SFIP_REGNUM:

      word_offset = R_FIP;

      break;

    default:

      if (regno <= FP_REGNUM)

        word_offset = regno;

      else

        word_offset = ((regno - X0_REGNUM) * 4) + R_X0;

    }

  return (word_offset * 4);

}

#endif /* _CX_UX */