-/* Machine-dependent code which would otherwise be in infptrace.c,
- for GDB, the GNU debugger. This code is for the HP PA-RISC cpu.
- Copyright (C) 1986, 1987, 1989, 1990, 1991 Free Software Foundation, Inc.
-
- Contributed by the Center for Software Science at the
- University of Utah (pa-gdb-bugs@cs.utah.edu).
-
-/* Low level Unix child interface to ptrace, for GDB when running under Unix.
- Copyright (C) 1988, 1989, 1990, 1991 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 "frame.h"
-#include "inferior.h"
-#include "target.h"
-
-#ifdef USG
-#include <sys/types.h>
-#endif
-
-#include <sys/param.h>
-#include <sys/dir.h>
-#include <signal.h>
-#include <sys/ioctl.h>
-
-#include <sys/ptrace.h>
-
-
-#ifndef PT_ATTACH
-#define PT_ATTACH PTRACE_ATTACH
-#endif
-#ifndef PT_DETACH
-#define PT_DETACH PTRACE_DETACH
-#endif
-
-#include "gdbcore.h"
-#include <sys/user.h> /* After a.out.h */
-#include <sys/file.h>
-#include <sys/stat.h>
-\f
-/* This function simply calls ptrace with the given arguments.
- It exists so that all calls to ptrace are isolated in this
- machine-dependent file. */
-int
-call_ptrace (request, pid, addr, data)
- int request, pid, *addr, data;
-{
- return ptrace (request, pid, addr, data, 0);
-}
-
-#ifdef DEBUG_PTRACE
-/* For the rest of the file, use an extra level of indirection */
-/* This lets us breakpoint usefully on call_ptrace. */
-#define ptrace call_ptrace
-#endif
-
-/* This is used when GDB is exiting. It gives less chance of error.*/
-
-void
-kill_inferior_fast ()
-{
- if (inferior_pid == 0)
- return;
- ptrace (PT_EXIT, inferior_pid, 0, 0, 0); /* PT_EXIT = PT_KILL ? */
- wait ((int *)0);
-}
-
-void
-kill_inferior ()
-{
- kill_inferior_fast ();
- target_mourn_inferior ();
-}
-
-/* Resume execution of the inferior process.
- If STEP is nonzero, single-step it.
- If SIGNAL is nonzero, give it that signal. */
-
-void
-child_resume (step, signal)
- int step;
- int signal;
-{
- errno = 0;
-
- /* An address of (int *)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 (step)
- ptrace (PT_SINGLE, inferior_pid, (int *)1, signal, 0);
- else
- ptrace (PT_CONTIN, inferior_pid, (int *)1, signal, 0);
-
- if (errno)
- perror_with_name ("ptrace");
-}
-\f
-#ifdef ATTACH_DETACH
-/* Nonzero if we are debugging an attached process rather than
- an inferior. */
-extern int attach_flag;
-
-/* Start debugging the process whose number is PID. */
-int
-attach (pid)
- int pid;
-{
- errno = 0;
- ptrace (PT_ATTACH, pid, 0, 0, 0);
- if (errno)
- perror_with_name ("ptrace");
- attach_flag = 1;
- return pid;
-}
-
-/* Stop debugging the process whose number is PID
- and continue it with signal number SIGNAL.
- SIGNAL = 0 means just continue it. */
-
-void
-detach (signal)
- int signal;
-{
- errno = 0;
- ptrace (PT_DETACH, inferior_pid, 1, signal, 0);
- if (errno)
- perror_with_name ("ptrace");
- attach_flag = 0;
-}
-#endif /* ATTACH_DETACH */
-\f
-#if !defined (FETCH_INFERIOR_REGISTERS)
-
-/* KERNEL_U_ADDR is the amount to subtract from u.u_ar0
- to get the offset in the core file of the register values. */
-#if defined (KERNEL_U_ADDR_BSD)
-/* Get kernel_u_addr using BSD-style nlist(). */
-CORE_ADDR kernel_u_addr;
-
-#include <a.out.gnu.h> /* For struct nlist */
-
-void
-_initialize_kernel_u_addr ()
-{
- struct nlist names[2];
-
- names[0].n_un.n_name = "_u";
- names[1].n_un.n_name = NULL;
- if (nlist ("/vmunix", names) == 0)
- kernel_u_addr = names[0].n_value;
- else
- fatal ("Unable to get kernel u area address.");
-}
-#endif /* KERNEL_U_ADDR_BSD. */
-
-#if defined (KERNEL_U_ADDR_HPUX)
-/* Get kernel_u_addr using HPUX-style nlist(). */
-CORE_ADDR kernel_u_addr;
-
-struct hpnlist {
- char * n_name;
- long n_value;
- unsigned char n_type;
- unsigned char n_length;
- short n_almod;
- short n_unused;
-};
-static struct hpnlist nl[] = {{ "_u", -1, }, { (char *) 0, }};
-
-/* read the value of the u area from the hp-ux kernel */
-void _initialize_kernel_u_addr ()
-{
- struct user u;
- nlist ("/hp-ux", &nl);
- kernel_u_addr = nl[0].n_value;
-}
-#endif /* KERNEL_U_ADDR_HPUX. */
-
-#if !defined (offsetof)
-#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
-#endif
-
-/* U_REGS_OFFSET is the offset of the registers within the u area. */
-#if !defined (U_REGS_OFFSET)
-#define U_REGS_OFFSET \
- ptrace (PT_READ_U, inferior_pid, \
- (int *)(offsetof (struct user, u_ar0)), 0, 0) - KERNEL_U_ADDR
-#endif
-
-/* Registers we shouldn't try to fetch. */
-#if !defined (CANNOT_FETCH_REGISTER)
-#define CANNOT_FETCH_REGISTER(regno) 0
-#endif
-
-/* Fetch one register. */
-
-static void
-fetch_register (regno)
- int regno;
-{
- register unsigned int regaddr;
- char buf[MAX_REGISTER_RAW_SIZE];
- char mess[128]; /* For messages */
- register int i;
-
- /* Offset of registers within the u area. */
- unsigned int offset;
-
- if (CANNOT_FETCH_REGISTER (regno))
- {
- bzero (buf, REGISTER_RAW_SIZE (regno)); /* Supply zeroes */
- supply_register (regno, buf);
- return;
- }
-
- offset = U_REGS_OFFSET;
-
- regaddr = register_addr (regno, offset);
- for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
- {
- errno = 0;
- *(int *) &buf[i] = ptrace (PT_RUREGS, inferior_pid, (int *)regaddr, 0, 0);
- regaddr += sizeof (int);
- if (errno != 0)
- {
- sprintf (mess, "reading register %s (#%d)", reg_names[regno], regno);
- perror_with_name (mess);
- }
- }
- if (regno == PCOQ_HEAD_REGNUM || regno == PCOQ_TAIL_REGNUM)
- buf[3] &= ~0x3;
- supply_register (regno, buf);
-}
-
-
-/* Fetch all registers, or just one, from the child process. */
-
-void
-fetch_inferior_registers (regno)
- int regno;
-{
- if (regno == -1)
- for (regno = 0; regno < NUM_REGS; regno++)
- fetch_register (regno);
- else
- fetch_register (regno);
-}
-
-/* Registers we shouldn't try to store. */
-#if !defined (CANNOT_STORE_REGISTER)
-#define CANNOT_STORE_REGISTER(regno) 0
-#endif
-
-/* 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];
- extern char registers[];
- register int i;
-
- unsigned int offset = U_REGS_OFFSET;
-
- if (regno >= 0)
- {
- regaddr = register_addr (regno, offset);
- for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof(int))
- {
- errno = 0;
- ptrace (PT_WUAREA, inferior_pid, (int *)regaddr,
- *(int *) ®isters[REGISTER_BYTE (regno) + i], 0);
- if (errno != 0)
- {
- sprintf (buf, "writing register number %d(%d)", regno, i);
- perror_with_name (buf);
- }
- regaddr += sizeof(int);
- }
- }
- else
- {
- for (regno = 0; regno < NUM_REGS; regno++)
- {
- if (CANNOT_STORE_REGISTER (regno))
- continue;
- regaddr = register_addr (regno, offset);
- for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof(int))
- {
- errno = 0;
- ptrace (PT_WUAREA, inferior_pid, (int *)regaddr,
- *(int *) ®isters[REGISTER_BYTE (regno) + i], 0);
- if (errno != 0)
- {
- sprintf (buf, "writing register number %d(%d)", regno, i);
- perror_with_name (buf);
- }
- regaddr += sizeof(int);
- }
- }
- }
- return;
-}
-#endif /* !defined (FETCH_INFERIOR_REGISTERS). */
-\f
-/* NOTE! I tried using PTRACE_READDATA, etc., to read and write memory
- in the NEW_SUN_PTRACE case.
- It ought to be straightforward. But it appears that writing did
- not write the data that I specified. I cannot understand where
- it got the data that it actually did write. */
-
-/* Copy LEN bytes to or from inferior's memory starting at MEMADDR
- to debugger memory starting at MYADDR. Copy to inferior if
- WRITE is nonzero.
-
- Returns the length copied, which is either the LEN argument or zero.
- This xfer function does not do partial moves, since child_ops
- doesn't allow memory operations to cross below us in the target stack
- anyway. */
-
-int
-child_xfer_memory (memaddr, myaddr, len, write, target)
- CORE_ADDR memaddr;
- char *myaddr;
- int len;
- int write;
- struct target_ops *target; /* ignored */
-{
- register int i;
- /* Round starting address down to longword boundary. */
- register CORE_ADDR addr = memaddr & - sizeof (int);
- /* Round ending address up; get number of longwords that makes. */
- register int count
- = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int);
- /* Allocate buffer of that many longwords. */
- register int *buffer = (int *) alloca (count * sizeof (int));
-
- if (write)
- {
- /* Fill start and end extra bytes of buffer with existing memory data. */
-
- if (addr != memaddr || len < (int)sizeof (int)) {
- /* Need part of initial word -- fetch it. */
- buffer[0] = ptrace (PT_RIUSER, inferior_pid, (int *)addr, 0, 0);
- }
-
- if (count > 1) /* FIXME, avoid if even boundary */
- {
- buffer[count - 1]
- = ptrace (PT_RIUSER, inferior_pid,
- (int *)(addr + (count - 1) * sizeof (int)), 0, 0);
- }
-
- /* Copy data to be written over corresponding part of buffer */
-
- bcopy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len);
-
- /* Write the entire buffer. */
-
- for (i = 0; i < count; i++, addr += sizeof (int))
- {
- errno = 0;
- ptrace (PT_WDUSER, inferior_pid, (int *)addr, buffer[i], 0);
- if (errno)
- {
- /* Using the appropriate one (I or D) is necessary for
- Gould NP1, at least. */
- errno = 0;
- ptrace (PT_WIUSER, inferior_pid, (int *)addr, buffer[i], 0);
- }
- if (errno)
- return 0;
- }
- }
- else
- {
- /* Read all the longwords */
- for (i = 0; i < count; i++, addr += sizeof (int))
- {
- errno = 0;
- buffer[i] = ptrace (PT_RIUSER, inferior_pid, (int *)addr, 0, 0);
- if (errno)
- return 0;
- QUIT;
- }
-
- /* Copy appropriate bytes out of the buffer. */
- bcopy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len);
- }
- return len;
-}
-
-
-
-
-int
-getpagesize()
-{
- return(4096);
-}
projects / deliverable / binutils-gdb.git / blobdiff