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Diffstat (limited to 'gdb/hppabsd-xdep.c')
-rw-r--r-- | gdb/hppabsd-xdep.c | 413 |
1 files changed, 0 insertions, 413 deletions
diff --git a/gdb/hppabsd-xdep.c b/gdb/hppabsd-xdep.c index bec14c4..e69de29 100644 --- a/gdb/hppabsd-xdep.c +++ b/gdb/hppabsd-xdep.c @@ -1,413 +0,0 @@ -/* 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 1986, 1987, 1989, 1990, 1991, 1992 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 "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> -#ifndef USG -#include <sys/ptrace.h> -#endif - - -#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> - -/* 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; - PTRACE_ARG3_TYPE addr; - int data; -{ - return ptrace (request, pid, addr, data); -} - -#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 - -void -kill_inferior () -{ - if (inferior_pid == 0) - return; - ptrace (PT_KILL, inferior_pid, (PTRACE_ARG3_TYPE) 0, 0); - wait ((int *)0); - 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 (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 (step) - ptrace (PT_STEP, inferior_pid, (PTRACE_ARG3_TYPE) 1, signal); - else - ptrace (PT_CONTINUE, inferior_pid, (PTRACE_ARG3_TYPE) 1, signal); - - if (errno) - perror_with_name ("ptrace"); -} - -#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, (PTRACE_ARG3_TYPE) 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, (PTRACE_ARG3_TYPE) 1, signal); - if (errno) - perror_with_name ("ptrace"); - attach_flag = 0; -} -#endif /* ATTACH_DETACH */ - -#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, \ - (PTRACE_ARG3_TYPE) (offsetof (struct user, u_ar0)), 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, - (PTRACE_ARG3_TYPE) regaddr, 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_WRITE_U, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, - *(int *) ®isters[REGISTER_BYTE (regno) + i]); - 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_WRITE_U, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, - *(int *) ®isters[REGISTER_BYTE (regno) + i]); - 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). */ - -/* 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_READ_I, inferior_pid, (PTRACE_ARG3_TYPE) addr, - 0); - } - - if (count > 1) /* FIXME, avoid if even boundary */ - { - buffer[count - 1] - = ptrace (PT_READ_I, inferior_pid, - (PTRACE_ARG3_TYPE) (addr + (count - 1) * sizeof (int)), - 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_WRITE_D, inferior_pid, (PTRACE_ARG3_TYPE) addr, - buffer[i]); - if (errno) - { - /* Using the appropriate one (I or D) is necessary for - Gould NP1, at least. */ - errno = 0; - ptrace (PT_WRITE_I, inferior_pid, (PTRACE_ARG3_TYPE) addr, - buffer[i]); - } - if (errno) - return 0; - } - } - else - { - /* Read all the longwords */ - for (i = 0; i < count; i++, addr += sizeof (int)) - { - errno = 0; - buffer[i] = ptrace (PT_READ_I, inferior_pid, - (PTRACE_ARG3_TYPE) addr, 0); - if (errno) - return 0; - QUIT; - } - - /* Copy appropriate bytes out of the buffer. */ - bcopy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len); - } - return len; -} |