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/* Native-dependent code for ptx 4.0

   Copyright 1988, 1989, 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 "inferior.h"

#include "gdbcore.h"

#include <sys/procfs.h>

#include <sys/ptrace.h>

#include <sys/param.h>

#include <fcntl.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;

{

  supply_register (EAX_REGNUM, (char *) &(*gregsetp)[EAX]);

  supply_register (EDX_REGNUM, (char *) &(*gregsetp)[EDX]);

  supply_register (ECX_REGNUM, (char *) &(*gregsetp)[ECX]);

  supply_register (EBX_REGNUM, (char *) &(*gregsetp)[EBX]);

  supply_register (ESI_REGNUM, (char *) &(*gregsetp)[ESI]);

  supply_register (EDI_REGNUM, (char *) &(*gregsetp)[EDI]);

  supply_register (ESP_REGNUM, (char *) &(*gregsetp)[UESP]);

  supply_register (EBP_REGNUM, (char *) &(*gregsetp)[EBP]);

  supply_register (EIP_REGNUM, (char *) &(*gregsetp)[EIP]);

  supply_register (EFLAGS_REGNUM, (char *) &(*gregsetp)[EFL]);

}

void

fill_gregset (gregsetp, regno)

     gregset_t *gregsetp;

     int regno;

{

  int regi;

  for (regi = 0; regi < NUM_REGS; regi++)

    {

      if ((regno == -1) || (regno == regi))

        {

          (*gregsetp)[regi] = *(greg_t *) & registers[REGISTER_BYTE (regi)];

        }

    }

}

#if defined (FP0_REGNUM)

/*  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;

{

  supply_fpu_registers ((struct fpusave *) &fpregsetp->fp_reg_set);

  supply_fpa_registers ((struct fpasave *) &fpregsetp->f_wregs);

}

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

   (fpregset_t *), update the register specified by REGNO from gdb's idea

   of the current floating point register set.  If REGNO is -1, update

   them all. */

void

fill_fpregset (fpregsetp, regno)

     fpregset_t *fpregsetp;

     int regno;

{

  int regi;

  char *to;

  char *from;

  /* FIXME: see m68k-tdep.c for an example, for the m68k. */

}

#endif /* defined (FP0_REGNUM) */

/*

 * This doesn't quite do the same thing as the procfs.c version, but give

 * it the same name so we don't have to put an ifdef in solib.c.

 */

/* this could use elf_interpreter() from elfread.c */

int

proc_iterate_over_mappings (func)

     int (*func) PARAMS ((int, CORE_ADDR));

{

  vaddr_t curseg, memptr;

  pt_vseg_t pv;

  int rv, cmperr;

  sec_ptr interp_sec;

  char *interp_content;

  int interp_fd, funcstat;

  unsigned int size;

  char buf1[NBPG], buf2[NBPG];

  /*

   * The following is really vile.  We can get the name of the

   * shared library from the exec_bfd, and we can get a list of

   * each virtual memory segment, but there is no simple way to

   * find the mapped segment from the shared library (ala

   * procfs's PIOCOPENMEM).  As a pretty nasty kludge, we

   * compare the virtual memory segment to the contents of the

   * .interp file.  If they match, we assume that we've got the

   * right one.

   */

  /*

   * TODO: for attach, use XPT_OPENT to get the executable, in

   * case we're attached without knowning the executable's

   * filename.

   */

#ifdef VERBOSE_DEBUG

  printf ("proc_iter\n");

#endif

  interp_sec = bfd_get_section_by_name (exec_bfd, ".interp");

  if (!interp_sec)

    {

      return 0;

    }

  size = bfd_section_size (exec_bfd, interp_sec);

  interp_content = alloca (size);

  if (0 == bfd_get_section_contents (exec_bfd, interp_sec,

                                     interp_content, (file_ptr) 0, size))

    {

      return 0;

    }

#ifdef VERBOSE_DEBUG

  printf ("proc_iter: \"%s\"\n", interp_content);

#endif

  interp_fd = open (interp_content, O_RDONLY, 0);

  if (-1 == interp_fd)

    {

      return 0;

    }

  curseg = 0;

  while (1)

    {

      rv = ptrace (PT_NEXT_VSEG, inferior_pid, &pv, curseg);

#ifdef VERBOSE_DEBUG

      printf ("PT_NEXT_VSEG: rv %d errno %d\n", rv, errno);

#endif

      if (-1 == rv)

        break;

      if (0 == rv)

        break;

#ifdef VERBOSE_DEBUG

      printf ("pv.pv_start 0x%x pv_size 0x%x pv_prot 0x%x\n",

              pv.pv_start, pv.pv_size, pv.pv_prot);

#endif

      curseg = pv.pv_start + pv.pv_size;

      rv = lseek (interp_fd, 0, SEEK_SET);

      if (-1 == rv)

        {

          perror ("lseek");

          close (interp_fd);

          return 0;

        }

      for (memptr = pv.pv_start; memptr < pv.pv_start + pv.pv_size;

           memptr += NBPG)

        {

#ifdef VERBOSE_DEBUG

          printf ("memptr 0x%x\n", memptr);

#endif

          rv = read (interp_fd, buf1, NBPG);

          if (-1 == rv)

            {

              perror ("read");

              close (interp_fd);

              return 0;

            }

          rv = ptrace (PT_RDATA_PAGE, inferior_pid, buf2,

                       memptr);

          if (-1 == rv)

            {

              perror ("ptrace");

              close (interp_fd);

              return 0;

            }

          cmperr = memcmp (buf1, buf2, NBPG);

          if (cmperr)

            break;

        }

      if (0 == cmperr)

        {

          /* this is it */

          funcstat = (*func) (interp_fd, pv.pv_start);

          break;

        }

    }

  close (interp_fd);

  return 0;

}