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/* Native-dependent code for LynxOS.
   Copyright 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 "target.h"
#include "gdbcore.h"
 
#include <sys/ptrace.h>
#include <sys/wait.h>
#include <sys/fpp.h>
 
static unsigned long registers_addr PARAMS ((int pid));
static void fetch_core_registers PARAMS ((char *, unsigned, int, CORE_ADDR));
 
#define X(ENTRY)(offsetof(struct econtext, ENTRY))
 
#ifdef I386
/* Mappings from tm-i386v.h */
 
static int regmap[] =
{
  X (eax),
  X (ecx),
  X (edx),
  X (ebx),
  X (esp),                      /* sp */
  X (ebp),                      /* fp */
  X (esi),
  X (edi),
  X (eip),                      /* pc */
  X (flags),                    /* ps */
  X (cs),
  X (ss),
  X (ds),
  X (es),
  X (ecode),                    /* Lynx doesn't give us either fs or gs, so */
  X (fault),                    /* we just substitute these two in the hopes
                                   that they are useful. */
};
#endif /* I386 */
 
#ifdef M68K
/* Mappings from tm-m68k.h */
 
static int regmap[] =
{
  X (regs[0]),                   /* d0 */
  X (regs[1]),                  /* d1 */
  X (regs[2]),                  /* d2 */
  X (regs[3]),                  /* d3 */
  X (regs[4]),                  /* d4 */
  X (regs[5]),                  /* d5 */
  X (regs[6]),                  /* d6 */
  X (regs[7]),                  /* d7 */
  X (regs[8]),                  /* a0 */
  X (regs[9]),                  /* a1 */
  X (regs[10]),                 /* a2 */
  X (regs[11]),                 /* a3 */
  X (regs[12]),                 /* a4 */
  X (regs[13]),                 /* a5 */
  X (regs[14]),                 /* fp */
  offsetof (st_t, usp) - offsetof (st_t, ec),   /* sp */
  X (status),                   /* ps */
  X (pc),
 
  X (fregs[0 * 3]),              /* fp0 */
  X (fregs[1 * 3]),             /* fp1 */
  X (fregs[2 * 3]),             /* fp2 */
  X (fregs[3 * 3]),             /* fp3 */
  X (fregs[4 * 3]),             /* fp4 */
  X (fregs[5 * 3]),             /* fp5 */
  X (fregs[6 * 3]),             /* fp6 */
  X (fregs[7 * 3]),             /* fp7 */
 
  X (fcregs[0]),         /* fpcontrol */
  X (fcregs[1]),                /* fpstatus */
  X (fcregs[2]),                /* fpiaddr */
  X (ssw),                      /* fpcode */
  X (fault),                    /* fpflags */
};
#endif /* M68K */
 
#ifdef SPARC
/* Mappings from tm-sparc.h */
 
#define FX(ENTRY)(offsetof(struct fcontext, ENTRY))
 
static int regmap[] =
{
  -1,                           /* g0 */
  X (g1),
  X (g2),
  X (g3),
  X (g4),
  -1,                           /* g5->g7 aren't saved by Lynx */
  -1,
  -1,
 
  X (o[0]),
  X (o[1]),
  X (o[2]),
  X (o[3]),
  X (o[4]),
  X (o[5]),
  X (o[6]),                     /* sp */
  X (o[7]),                     /* ra */
 
  -1, -1, -1, -1, -1, -1, -1, -1,       /* l0 -> l7 */
 
  -1, -1, -1, -1, -1, -1, -1, -1,       /* i0 -> i7 */
 
  FX (f.fregs[0]),               /* f0 */
  FX (f.fregs[1]),
  FX (f.fregs[2]),
  FX (f.fregs[3]),
  FX (f.fregs[4]),
  FX (f.fregs[5]),
  FX (f.fregs[6]),
  FX (f.fregs[7]),
  FX (f.fregs[8]),
  FX (f.fregs[9]),
  FX (f.fregs[10]),
  FX (f.fregs[11]),
  FX (f.fregs[12]),
  FX (f.fregs[13]),
  FX (f.fregs[14]),
  FX (f.fregs[15]),
  FX (f.fregs[16]),
  FX (f.fregs[17]),
  FX (f.fregs[18]),
  FX (f.fregs[19]),
  FX (f.fregs[20]),
  FX (f.fregs[21]),
  FX (f.fregs[22]),
  FX (f.fregs[23]),
  FX (f.fregs[24]),
  FX (f.fregs[25]),
  FX (f.fregs[26]),
  FX (f.fregs[27]),
  FX (f.fregs[28]),
  FX (f.fregs[29]),
  FX (f.fregs[30]),
  FX (f.fregs[31]),
 
  X (y),
  X (psr),
  X (wim),
  X (tbr),
  X (pc),
  X (npc),
  FX (fsr),                     /* fpsr */
  -1,                           /* cpsr */
};
#endif /* SPARC */
 
#ifdef rs6000
 
static int regmap[] =
{
  X (iregs[0]),                  /* r0 */
  X (iregs[1]),
  X (iregs[2]),
  X (iregs[3]),
  X (iregs[4]),
  X (iregs[5]),
  X (iregs[6]),
  X (iregs[7]),
  X (iregs[8]),
  X (iregs[9]),
  X (iregs[10]),
  X (iregs[11]),
  X (iregs[12]),
  X (iregs[13]),
  X (iregs[14]),
  X (iregs[15]),
  X (iregs[16]),
  X (iregs[17]),
  X (iregs[18]),
  X (iregs[19]),
  X (iregs[20]),
  X (iregs[21]),
  X (iregs[22]),
  X (iregs[23]),
  X (iregs[24]),
  X (iregs[25]),
  X (iregs[26]),
  X (iregs[27]),
  X (iregs[28]),
  X (iregs[29]),
  X (iregs[30]),
  X (iregs[31]),
 
  X (fregs[0]),                  /* f0 */
  X (fregs[1]),
  X (fregs[2]),
  X (fregs[3]),
  X (fregs[4]),
  X (fregs[5]),
  X (fregs[6]),
  X (fregs[7]),
  X (fregs[8]),
  X (fregs[9]),
  X (fregs[10]),
  X (fregs[11]),
  X (fregs[12]),
  X (fregs[13]),
  X (fregs[14]),
  X (fregs[15]),
  X (fregs[16]),
  X (fregs[17]),
  X (fregs[18]),
  X (fregs[19]),
  X (fregs[20]),
  X (fregs[21]),
  X (fregs[22]),
  X (fregs[23]),
  X (fregs[24]),
  X (fregs[25]),
  X (fregs[26]),
  X (fregs[27]),
  X (fregs[28]),
  X (fregs[29]),
  X (fregs[30]),
  X (fregs[31]),
 
  X (srr0),                     /* IAR (PC) */
  X (srr1),                     /* MSR (PS) */
  X (cr),                       /* CR */
  X (lr),                       /* LR */
  X (ctr),                      /* CTR */
  X (xer),                      /* XER */
  X (mq)                        /* MQ */
};
 
#endif /* rs6000 */
 
#ifdef SPARC
 
/* This routine handles some oddball cases for Sparc registers and LynxOS.
   In partucular, it causes refs to G0, g5->7, and all fp regs to return zero.
   It also handles knows where to find the I & L regs on the stack.  */
 
void
fetch_inferior_registers (regno)
     int regno;
{
  int whatregs = 0;
 
#define WHATREGS_FLOAT 1
#define WHATREGS_GEN 2
#define WHATREGS_STACK 4
 
  if (regno == -1)
    whatregs = WHATREGS_FLOAT | WHATREGS_GEN | WHATREGS_STACK;
  else if (regno >= L0_REGNUM && regno <= I7_REGNUM)
    whatregs = WHATREGS_STACK;
  else if (regno >= FP0_REGNUM && regno < FP0_REGNUM + 32)
    whatregs = WHATREGS_FLOAT;
  else
    whatregs = WHATREGS_GEN;
 
  if (whatregs & WHATREGS_GEN)
    {
      struct econtext ec;       /* general regs */
      char buf[MAX_REGISTER_RAW_SIZE];
      int retval;
      int i;
 
      errno = 0;
      retval = ptrace (PTRACE_GETREGS, inferior_pid, (PTRACE_ARG3_TYPE) & ec,
                       0);
      if (errno)
        perror_with_name ("ptrace(PTRACE_GETREGS)");
 
      memset (buf, 0, REGISTER_RAW_SIZE (G0_REGNUM));
      supply_register (G0_REGNUM, buf);
      supply_register (TBR_REGNUM, (char *) &ec.tbr);
 
      memcpy (&registers[REGISTER_BYTE (G1_REGNUM)], &ec.g1,
              4 * REGISTER_RAW_SIZE (G1_REGNUM));
      for (i = G1_REGNUM; i <= G1_REGNUM + 3; i++)
        register_valid[i] = 1;
 
      supply_register (PS_REGNUM, (char *) &ec.psr);
      supply_register (Y_REGNUM, (char *) &ec.y);
      supply_register (PC_REGNUM, (char *) &ec.pc);
      supply_register (NPC_REGNUM, (char *) &ec.npc);
      supply_register (WIM_REGNUM, (char *) &ec.wim);
 
      memcpy (&registers[REGISTER_BYTE (O0_REGNUM)], ec.o,
              8 * REGISTER_RAW_SIZE (O0_REGNUM));
      for (i = O0_REGNUM; i <= O0_REGNUM + 7; i++)
        register_valid[i] = 1;
    }
 
  if (whatregs & WHATREGS_STACK)
    {
      CORE_ADDR sp;
      int i;
 
      sp = read_register (SP_REGNUM);
 
      target_read_memory (sp + FRAME_SAVED_I0,
                          &registers[REGISTER_BYTE (I0_REGNUM)],
                          8 * REGISTER_RAW_SIZE (I0_REGNUM));
      for (i = I0_REGNUM; i <= I7_REGNUM; i++)
        register_valid[i] = 1;
 
      target_read_memory (sp + FRAME_SAVED_L0,
                          &registers[REGISTER_BYTE (L0_REGNUM)],
                          8 * REGISTER_RAW_SIZE (L0_REGNUM));
      for (i = L0_REGNUM; i <= L0_REGNUM + 7; i++)
        register_valid[i] = 1;
    }
 
  if (whatregs & WHATREGS_FLOAT)
    {
      struct fcontext fc;       /* fp regs */
      int retval;
      int i;
 
      errno = 0;
      retval = ptrace (PTRACE_GETFPREGS, inferior_pid, (PTRACE_ARG3_TYPE) & fc,
                       0);
      if (errno)
        perror_with_name ("ptrace(PTRACE_GETFPREGS)");
 
      memcpy (&registers[REGISTER_BYTE (FP0_REGNUM)], fc.f.fregs,
              32 * REGISTER_RAW_SIZE (FP0_REGNUM));
      for (i = FP0_REGNUM; i <= FP0_REGNUM + 31; i++)
        register_valid[i] = 1;
 
      supply_register (FPS_REGNUM, (char *) &fc.fsr);
    }
}
 
/* This routine handles storing of the I & L regs for the Sparc.  The trick
   here is that they actually live on the stack.  The really tricky part is
   that when changing the stack pointer, the I & L regs must be written to
   where the new SP points, otherwise the regs will be incorrect when the
   process is started up again.   We assume that the I & L regs are valid at
   this point.  */
 
void
store_inferior_registers (regno)
     int regno;
{
  int whatregs = 0;
 
  if (regno == -1)
    whatregs = WHATREGS_FLOAT | WHATREGS_GEN | WHATREGS_STACK;
  else if (regno >= L0_REGNUM && regno <= I7_REGNUM)
    whatregs = WHATREGS_STACK;
  else if (regno >= FP0_REGNUM && regno < FP0_REGNUM + 32)
    whatregs = WHATREGS_FLOAT;
  else if (regno == SP_REGNUM)
    whatregs = WHATREGS_STACK | WHATREGS_GEN;
  else
    whatregs = WHATREGS_GEN;
 
  if (whatregs & WHATREGS_GEN)
    {
      struct econtext ec;       /* general regs */
      int retval;
 
      ec.tbr = read_register (TBR_REGNUM);
      memcpy (&ec.g1, &registers[REGISTER_BYTE (G1_REGNUM)],
              4 * REGISTER_RAW_SIZE (G1_REGNUM));
 
      ec.psr = read_register (PS_REGNUM);
      ec.y = read_register (Y_REGNUM);
      ec.pc = read_register (PC_REGNUM);
      ec.npc = read_register (NPC_REGNUM);
      ec.wim = read_register (WIM_REGNUM);
 
      memcpy (ec.o, &registers[REGISTER_BYTE (O0_REGNUM)],
              8 * REGISTER_RAW_SIZE (O0_REGNUM));
 
      errno = 0;
      retval = ptrace (PTRACE_SETREGS, inferior_pid, (PTRACE_ARG3_TYPE) & ec,
                       0);
      if (errno)
        perror_with_name ("ptrace(PTRACE_SETREGS)");
    }
 
  if (whatregs & WHATREGS_STACK)
    {
      int regoffset;
      CORE_ADDR sp;
 
      sp = read_register (SP_REGNUM);
 
      if (regno == -1 || regno == SP_REGNUM)
        {
          if (!register_valid[L0_REGNUM + 5])
            abort ();
          target_write_memory (sp + FRAME_SAVED_I0,
                              &registers[REGISTER_BYTE (I0_REGNUM)],
                              8 * REGISTER_RAW_SIZE (I0_REGNUM));
 
          target_write_memory (sp + FRAME_SAVED_L0,
                              &registers[REGISTER_BYTE (L0_REGNUM)],
                              8 * REGISTER_RAW_SIZE (L0_REGNUM));
        }
      else if (regno >= L0_REGNUM && regno <= I7_REGNUM)
        {
          if (!register_valid[regno])
            abort ();
          if (regno >= L0_REGNUM && regno <= L0_REGNUM + 7)
            regoffset = REGISTER_BYTE (regno) - REGISTER_BYTE (L0_REGNUM)
              + FRAME_SAVED_L0;
          else
            regoffset = REGISTER_BYTE (regno) - REGISTER_BYTE (I0_REGNUM)
              + FRAME_SAVED_I0;
          target_write_memory (sp + regoffset,
                              &registers[REGISTER_BYTE (regno)],
                              REGISTER_RAW_SIZE (regno));
        }
    }
 
  if (whatregs & WHATREGS_FLOAT)
    {
      struct fcontext fc;       /* fp regs */
      int retval;
 
/* We read fcontext first so that we can get good values for fq_t... */
      errno = 0;
      retval = ptrace (PTRACE_GETFPREGS, inferior_pid, (PTRACE_ARG3_TYPE) & fc,
                       0);
      if (errno)
        perror_with_name ("ptrace(PTRACE_GETFPREGS)");
 
      memcpy (fc.f.fregs, &registers[REGISTER_BYTE (FP0_REGNUM)],
              32 * REGISTER_RAW_SIZE (FP0_REGNUM));
 
      fc.fsr = read_register (FPS_REGNUM);
 
      errno = 0;
      retval = ptrace (PTRACE_SETFPREGS, inferior_pid, (PTRACE_ARG3_TYPE) & fc,
                       0);
      if (errno)
        perror_with_name ("ptrace(PTRACE_SETFPREGS)");
    }
}
#endif /* SPARC */
 
#if defined (I386) || defined (M68K) || defined (rs6000)
 
/* Return the offset relative to the start of the per-thread data to the
   saved context block.  */
 
static unsigned long
registers_addr (pid)
     int pid;
{
  CORE_ADDR stblock;
  int ecpoff = offsetof (st_t, ecp);
  CORE_ADDR ecp;
 
  errno = 0;
  stblock = (CORE_ADDR) ptrace (PTRACE_THREADUSER, pid, (PTRACE_ARG3_TYPE) 0,
                                0);
  if (errno)
    perror_with_name ("ptrace(PTRACE_THREADUSER)");
 
  ecp = (CORE_ADDR) ptrace (PTRACE_PEEKTHREAD, pid, (PTRACE_ARG3_TYPE) ecpoff,
                            0);
  if (errno)
    perror_with_name ("ptrace(PTRACE_PEEKTHREAD)");
 
  return ecp - stblock;
}
 
/* Fetch one or more registers from the inferior.  REGNO == -1 to get
   them all.  We actually fetch more than requested, when convenient,
   marking them as valid so we won't fetch them again.  */
 
void
fetch_inferior_registers (regno)
     int regno;
{
  int reglo, reghi;
  int i;
  unsigned long ecp;
 
  if (regno == -1)
    {
      reglo = 0;
      reghi = NUM_REGS - 1;
    }
  else
    reglo = reghi = regno;
 
  ecp = registers_addr (inferior_pid);
 
  for (regno = reglo; regno <= reghi; regno++)
    {
      char buf[MAX_REGISTER_RAW_SIZE];
      int ptrace_fun = PTRACE_PEEKTHREAD;
 
#ifdef M68K
      ptrace_fun = regno == SP_REGNUM ? PTRACE_PEEKUSP : PTRACE_PEEKTHREAD;
#endif
 
      for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
        {
          unsigned int reg;
 
          errno = 0;
          reg = ptrace (ptrace_fun, inferior_pid,
                        (PTRACE_ARG3_TYPE) (ecp + regmap[regno] + i), 0);
          if (errno)
            perror_with_name ("ptrace(PTRACE_PEEKUSP)");
 
          *(int *) &buf[i] = reg;
        }
      supply_register (regno, 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).  */
 
/* Registers we shouldn't try to store.  */
#if !defined (CANNOT_STORE_REGISTER)
#define CANNOT_STORE_REGISTER(regno) 0
#endif
 
void
store_inferior_registers (regno)
     int regno;
{
  int reglo, reghi;
  int i;
  unsigned long ecp;
 
  if (regno == -1)
    {
      reglo = 0;
      reghi = NUM_REGS - 1;
    }
  else
    reglo = reghi = regno;
 
  ecp = registers_addr (inferior_pid);
 
  for (regno = reglo; regno <= reghi; regno++)
    {
      int ptrace_fun = PTRACE_POKEUSER;
 
      if (CANNOT_STORE_REGISTER (regno))
        continue;
 
#ifdef M68K
      ptrace_fun = regno == SP_REGNUM ? PTRACE_POKEUSP : PTRACE_POKEUSER;
#endif
 
      for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
        {
          unsigned int reg;
 
          reg = *(unsigned int *) &registers[REGISTER_BYTE (regno) + i];
 
          errno = 0;
          ptrace (ptrace_fun, inferior_pid,
                  (PTRACE_ARG3_TYPE) (ecp + regmap[regno] + i), reg);
          if (errno)
            perror_with_name ("ptrace(PTRACE_POKEUSP)");
        }
    }
}
#endif /* defined (I386) || defined (M68K) || defined (rs6000) */
 
/* Wait for child to do something.  Return pid of child, or -1 in case
   of error; store status through argument pointer OURSTATUS.  */
 
int
child_wait (pid, ourstatus)
     int pid;
     struct target_waitstatus *ourstatus;
{
  int save_errno;
  int thread;
  union wait status;
 
  while (1)
    {
      int sig;
 
      set_sigint_trap ();       /* Causes SIGINT to be passed on to the
                                   attached process. */
      pid = wait (&status);
 
      save_errno = errno;
 
      clear_sigint_trap ();
 
      if (pid == -1)
        {
          if (save_errno == EINTR)
            continue;
          fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing: %s.\n",
                              safe_strerror (save_errno));
          /* Claim it exited with unknown signal.  */
          ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
          ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
          return -1;
        }
 
      if (pid != PIDGET (inferior_pid))         /* Some other process?!? */
        continue;
 
      thread = status.w_tid;    /* Get thread id from status */
 
      /* Initial thread value can only be acquired via wait, so we have to
         resort to this hack.  */
 
      if (TIDGET (inferior_pid) == 0 && thread != 0)
        {
          inferior_pid = BUILDPID (inferior_pid, thread);
          add_thread (inferior_pid);
        }
 
      pid = BUILDPID (pid, thread);
 
      /* We've become a single threaded process again.  */
      if (thread == 0)
        inferior_pid = pid;
 
      /* Check for thread creation.  */
      if (WIFSTOPPED (status)
          && WSTOPSIG (status) == SIGTRAP
          && !in_thread_list (pid))
        {
          int realsig;
 
          realsig = ptrace (PTRACE_GETTRACESIG, pid, (PTRACE_ARG3_TYPE) 0, 0);
 
          if (realsig == SIGNEWTHREAD)
            {
              /* It's a new thread notification.  We don't want to much with
                 realsig -- the code in wait_for_inferior expects SIGTRAP. */
              ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
              ourstatus->value.sig = TARGET_SIGNAL_0;
              return pid;
            }
          else
            error ("Signal for unknown thread was not SIGNEWTHREAD");
        }
 
      /* Check for thread termination.  */
      else if (WIFSTOPPED (status)
               && WSTOPSIG (status) == SIGTRAP
               && in_thread_list (pid))
        {
          int realsig;
 
          realsig = ptrace (PTRACE_GETTRACESIG, pid, (PTRACE_ARG3_TYPE) 0, 0);
 
          if (realsig == SIGTHREADEXIT)
            {
              ptrace (PTRACE_CONT, PIDGET (pid), (PTRACE_ARG3_TYPE) 0, 0);
              continue;
            }
        }
 
#ifdef SPARC
      /* SPARC Lynx uses an byte reversed wait status; we must use the
         host macros to access it.  These lines just a copy of
         store_waitstatus.  We can't use CHILD_SPECIAL_WAITSTATUS
         because target.c can't include the Lynx <sys/wait.h>.  */
      if (WIFEXITED (status))
        {
          ourstatus->kind = TARGET_WAITKIND_EXITED;
          ourstatus->value.integer = WEXITSTATUS (status);
        }
      else if (!WIFSTOPPED (status))
        {
          ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
          ourstatus->value.sig =
            target_signal_from_host (WTERMSIG (status));
        }
      else
        {
          ourstatus->kind = TARGET_WAITKIND_STOPPED;
          ourstatus->value.sig =
            target_signal_from_host (WSTOPSIG (status));
        }
#else
      store_waitstatus (ourstatus, status.w_status);
#endif
 
      return pid;
    }
}
 
/* Return nonzero if the given thread is still alive.  */
int
child_thread_alive (pid)
     int pid;
{
  /* Arggh.  Apparently pthread_kill only works for threads within
     the process that calls pthread_kill.
 
     We want to avoid the lynx signal extensions as they simply don't
     map well to the generic gdb interface we want to keep.
 
     All we want to do is determine if a particular thread is alive;
     it appears as if we can just make a harmless thread specific
     ptrace call to do that.  */
  return (ptrace (PTRACE_THREADUSER, pid, 0, 0) != -1);
}
 
/* Resume execution of the inferior process.
   If STEP is nonzero, single-step it.
   If SIGNAL is nonzero, give it that signal.  */
 
void
child_resume (pid, step, signal)
     int pid;
     int step;
     enum target_signal signal;
{
  int func;
 
  errno = 0;
 
  /* If pid == -1, then we want to step/continue all threads, else
     we only want to step/continue a single thread.  */
  if (pid == -1)
    {
      pid = inferior_pid;
      func = step ? PTRACE_SINGLESTEP : PTRACE_CONT;
    }
  else
    func = step ? PTRACE_SINGLESTEP_ONE : PTRACE_CONT_ONE;
 
 
  /* An address of (PTRACE_ARG3_TYPE)1 tells ptrace to continue from where
     it was.  (If GDB wanted it to start some other way, we have already
     written a new PC value to the child.)
 
     If this system does not support PT_STEP, a higher level function will
     have called single_step() to transmute the step request into a
     continue request (by setting breakpoints on all possible successor
     instructions), so we don't have to worry about that here.  */
 
  ptrace (func, pid, (PTRACE_ARG3_TYPE) 1, target_signal_to_host (signal));
 
  if (errno)
    perror_with_name ("ptrace");
}
 
/* Convert a Lynx process ID to a string.  Returns the string in a static
   buffer.  */
 
char *
child_pid_to_str (pid)
     int pid;
{
  static char buf[40];
 
  sprintf (buf, "process %d thread %d", PIDGET (pid), TIDGET (pid));
 
  return buf;
}
 
/* Extract the register values out of the core file and store
   them where `read_register' will find them.
 
   CORE_REG_SECT points to the register values themselves, read into memory.
   CORE_REG_SIZE is the size of that area.
   WHICH says which set of registers we are handling (0 = int, 2 = float
   on machines where they are discontiguous).
   REG_ADDR is the offset from u.u_ar0 to the register values relative to
   core_reg_sect.  This is used with old-fashioned core files to
   locate the registers in a large upage-plus-stack ".reg" section.
   Original upage address X is at location core_reg_sect+x+reg_addr.
 */
 
static void
fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
     char *core_reg_sect;
     unsigned core_reg_size;
     int which;
     CORE_ADDR reg_addr;
{
  struct st_entry s;
  unsigned int regno;
 
  for (regno = 0; regno < NUM_REGS; regno++)
    if (regmap[regno] != -1)
      supply_register (regno, core_reg_sect + offsetof (st_t, ec)
                       + regmap[regno]);
 
#ifdef SPARC
/* Fetching this register causes all of the I & L regs to be read from the
   stack and validated.  */
 
  fetch_inferior_registers (I0_REGNUM);
#endif
}
 
 
/* Register that we are able to handle lynx core file formats.
   FIXME: is this really bfd_target_unknown_flavour? */
 
static struct core_fns lynx_core_fns =
{
  bfd_target_unknown_flavour,           /* core_flavour */
  default_check_format,                 /* check_format */
  default_core_sniffer,                 /* core_sniffer */
  fetch_core_registers,                 /* core_read_registers */
  NULL                                  /* next */
};
 
void
_initialize_core_lynx ()
{
  add_core_fns (&lynx_core_fns);
}
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[/] [or1k/] [trunk/] [gdb-5.0/] [gdb/] [lynx-nat.c] - Blame information for rev 1774

Line No.	Rev	Author	Line
1	104	markom	`/* Native-dependent code for LynxOS.`
2			`Copyright 1993, 1994 Free Software Foundation, Inc.`
3
4			`This file is part of GDB.`
5
6			`This program is free software; you can redistribute it and/or modify`
7			`it under the terms of the GNU General Public License as published by`
8			`the Free Software Foundation; either version 2 of the License, or`
9			`(at your option) any later version.`
10
11			`This program is distributed in the hope that it will be useful,`
12			`but WITHOUT ANY WARRANTY; without even the implied warranty of`
13			`MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the`
14			`GNU General Public License for more details.`
15
16			`You should have received a copy of the GNU General Public License`
17			`along with this program; if not, write to the Free Software`
18			`Foundation, Inc., 59 Temple Place - Suite 330,`
19			`Boston, MA 02111-1307, USA. */`
20
21			`#include "defs.h"`
22			`#include "frame.h"`
23			`#include "inferior.h"`
24			`#include "target.h"`
25			`#include "gdbcore.h"`
26
27			`#include <sys/ptrace.h>`
28			`#include <sys/wait.h>`
29			`#include <sys/fpp.h>`
30
31			`static unsigned long registers_addr PARAMS ((int pid));`
32			`static void fetch_core_registers PARAMS ((char *, unsigned, int, CORE_ADDR));`
33
34			`#define X(ENTRY)(offsetof(struct econtext, ENTRY))`
35
36			`#ifdef I386`
37			`/* Mappings from tm-i386v.h */`
38
39			`static int regmap[] =`
40			`{`