1999-04-16 03:35:26 +02:00
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/* Acorn Risc Machine host machine support.
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Copyright (C) 1988, 1989, 1991 Free Software Foundation, Inc.
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1999-07-07 22:19:36 +02:00
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This file is part of GDB.
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1999-04-16 03:35:26 +02:00
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1999-07-07 22:19:36 +02:00
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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1999-04-16 03:35:26 +02:00
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1999-07-07 22:19:36 +02:00
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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1999-04-16 03:35:26 +02:00
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1999-07-07 22:19:36 +02:00
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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1999-04-16 03:35:26 +02:00
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#include "defs.h"
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#include "frame.h"
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#include "inferior.h"
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#include "arm-opcode.h"
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#include <sys/param.h>
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#include <sys/dir.h>
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#include <signal.h>
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#include <sys/ioctl.h>
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#include <sys/ptrace.h>
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#include <machine/reg.h>
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#define N_TXTADDR(hdr) 0x8000
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#define N_DATADDR(hdr) (hdr.a_text + 0x8000)
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#include "gdbcore.h"
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#include <sys/user.h> /* After a.out.h */
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#include <sys/file.h>
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#include "gdb_stat.h"
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#include <errno.h>
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void
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fetch_inferior_registers (regno)
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1999-07-07 22:19:36 +02:00
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int regno; /* Original value discarded */
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1999-04-16 03:35:26 +02:00
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{
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register unsigned int regaddr;
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char buf[MAX_REGISTER_RAW_SIZE];
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register int i;
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struct user u;
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unsigned int offset = (char *) &u.u_ar0 - (char *) &u;
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offset = ptrace (PT_READ_U, inferior_pid, (PTRACE_ARG3_TYPE) offset, 0)
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1999-07-07 22:19:36 +02:00
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- KERNEL_U_ADDR;
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1999-04-16 03:35:26 +02:00
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registers_fetched ();
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1999-07-07 22:19:36 +02:00
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1999-04-16 03:35:26 +02:00
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for (regno = 0; regno < 16; regno++)
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{
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regaddr = offset + regno * 4;
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1999-07-07 22:19:36 +02:00
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*(int *) &buf[0] = ptrace (PT_READ_U, inferior_pid,
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(PTRACE_ARG3_TYPE) regaddr, 0);
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1999-04-16 03:35:26 +02:00
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if (regno == PC_REGNUM)
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1999-07-07 22:19:36 +02:00
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*(int *) &buf[0] = GET_PC_PART (*(int *) &buf[0]);
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1999-04-16 03:35:26 +02:00
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supply_register (regno, buf);
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}
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1999-07-07 22:19:36 +02:00
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*(int *) &buf[0] = ptrace (PT_READ_U, inferior_pid,
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(PTRACE_ARG3_TYPE) (offset + PC * 4), 0);
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supply_register (PS_REGNUM, buf); /* set virtual register ps same as pc */
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1999-04-16 03:35:26 +02:00
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/* read the floating point registers */
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1999-07-07 22:19:36 +02:00
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offset = (char *) &u.u_fp_regs - (char *) &u;
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*(int *) buf = ptrace (PT_READ_U, inferior_pid, (PTRACE_ARG3_TYPE) offset, 0);
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1999-04-16 03:35:26 +02:00
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supply_register (FPS_REGNUM, buf);
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1999-07-07 22:19:36 +02:00
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for (regno = 16; regno < 24; regno++)
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{
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1999-04-16 03:35:26 +02:00
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regaddr = offset + 4 + 12 * (regno - 16);
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1999-07-07 22:19:36 +02:00
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for (i = 0; i < 12; i += sizeof (int))
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*(int *) &buf[i] = ptrace (PT_READ_U, inferior_pid,
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(PTRACE_ARG3_TYPE) (regaddr + i), 0);
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1999-04-16 03:35:26 +02:00
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supply_register (regno, buf);
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1999-07-07 22:19:36 +02:00
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}
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1999-04-16 03:35:26 +02:00
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}
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/* Store our register values back into the inferior.
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If REGNO is -1, do this for all registers.
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Otherwise, REGNO specifies which register (so we can save time). */
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void
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store_inferior_registers (regno)
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int regno;
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{
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register unsigned int regaddr;
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char buf[80];
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struct user u;
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unsigned long value;
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unsigned int offset = (char *) &u.u_ar0 - (char *) &u;
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offset = ptrace (PT_READ_U, inferior_pid, (PTRACE_ARG3_TYPE) offset, 0)
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1999-07-07 22:19:36 +02:00
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- KERNEL_U_ADDR;
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1999-04-16 03:35:26 +02:00
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1999-07-07 22:19:36 +02:00
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if (regno >= 0)
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{
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if (regno >= 16)
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return;
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1999-04-16 03:35:26 +02:00
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regaddr = offset + 4 * regno;
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errno = 0;
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1999-07-07 22:19:36 +02:00
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value = read_register (regno);
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1999-04-16 03:35:26 +02:00
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if (regno == PC_REGNUM)
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1999-07-07 22:19:36 +02:00
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value = SET_PC_PART (read_register (PS_REGNUM), value);
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1999-04-16 03:35:26 +02:00
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ptrace (PT_WRITE_U, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, value);
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if (errno != 0)
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{
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sprintf (buf, "writing register number %d", regno);
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perror_with_name (buf);
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}
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}
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1999-07-07 22:19:36 +02:00
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else
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for (regno = 0; regno < 15; regno++)
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{
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regaddr = offset + regno * 4;
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errno = 0;
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value = read_register (regno);
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if (regno == PC_REGNUM)
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value = SET_PC_PART (read_register (PS_REGNUM), value);
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ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, value);
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if (errno != 0)
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{
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sprintf (buf, "writing all regs, number %d", regno);
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perror_with_name (buf);
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}
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}
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1999-04-16 03:35:26 +02:00
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}
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/* Work with core dump and executable files, for GDB.
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This code would be in corefile.c if it weren't machine-dependent. */
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/* Structure to describe the chain of shared libraries used
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by the execfile.
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e.g. prog shares Xt which shares X11 which shares c. */
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1999-07-07 22:19:36 +02:00
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struct shared_library
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{
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struct exec_header header;
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char name[SHLIBLEN];
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CORE_ADDR text_start; /* CORE_ADDR of 1st byte of text, this file */
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long data_offset; /* offset of data section in file */
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int chan; /* file descriptor for the file */
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struct shared_library *shares; /* library this one shares */
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1999-04-16 03:35:26 +02:00
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};
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static struct shared_library *shlib = 0;
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/* Hook for `exec_file_command' command to call. */
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extern void (*exec_file_display_hook) ();
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1999-07-07 22:19:36 +02:00
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1999-04-16 03:35:26 +02:00
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static CORE_ADDR unshared_text_start;
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/* extended header from exec file (for shared library info) */
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static struct exec_header exec_header;
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void
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core_file_command (filename, from_tty)
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char *filename;
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int from_tty;
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{
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int val;
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/* Discard all vestiges of any previous core file
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and mark data and stack spaces as empty. */
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if (corefile)
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free (corefile);
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corefile = 0;
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if (corechan >= 0)
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close (corechan);
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corechan = -1;
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data_start = 0;
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data_end = 0;
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stack_start = STACK_END_ADDR;
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stack_end = STACK_END_ADDR;
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/* Now, if a new core file was specified, open it and digest it. */
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if (filename)
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{
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filename = tilde_expand (filename);
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make_cleanup (free, filename);
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1999-07-07 22:19:36 +02:00
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1999-04-16 03:35:26 +02:00
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if (have_inferior_p ())
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error ("To look at a core file, you must kill the program with \"kill\".");
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corechan = open (filename, O_RDONLY, 0);
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if (corechan < 0)
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perror_with_name (filename);
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/* 4.2-style (and perhaps also sysV-style) core dump file. */
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{
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struct user u;
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unsigned int reg_offset, fp_reg_offset;
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val = myread (corechan, &u, sizeof u);
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if (val < 0)
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perror_with_name ("Not a core file: reading upage");
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if (val != sizeof u)
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error ("Not a core file: could only read %d bytes", val);
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/* We are depending on exec_file_command having been called
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previously to set exec_data_start. Since the executable
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and the core file share the same text segment, the address
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of the data segment will be the same in both. */
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data_start = exec_data_start;
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data_end = data_start + NBPG * u.u_dsize;
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stack_start = stack_end - NBPG * u.u_ssize;
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data_offset = NBPG * UPAGES;
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stack_offset = NBPG * (UPAGES + u.u_dsize);
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/* Some machines put an absolute address in here and some put
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the offset in the upage of the regs. */
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reg_offset = (int) u.u_ar0;
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if (reg_offset > NBPG * UPAGES)
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reg_offset -= KERNEL_U_ADDR;
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1999-07-07 22:19:36 +02:00
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fp_reg_offset = (char *) &u.u_fp_regs - (char *) &u;
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1999-04-16 03:35:26 +02:00
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/* I don't know where to find this info.
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So, for now, mark it as not available. */
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N_SET_MAGIC (core_aouthdr, 0);
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/* Read the register values out of the core file and store
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them where `read_register' will find them. */
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{
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register int regno;
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for (regno = 0; regno < NUM_REGS; regno++)
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{
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char buf[MAX_REGISTER_RAW_SIZE];
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if (regno < 16)
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1999-07-07 22:19:36 +02:00
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val = lseek (corechan, reg_offset + 4 * regno, 0);
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1999-04-16 03:35:26 +02:00
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else if (regno < 24)
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1999-07-07 22:19:36 +02:00
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val = lseek (corechan, fp_reg_offset + 4 + 12 * (regno - 24), 0);
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1999-04-16 03:35:26 +02:00
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else if (regno == 24)
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1999-07-07 22:19:36 +02:00
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val = lseek (corechan, fp_reg_offset, 0);
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1999-04-16 03:35:26 +02:00
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else if (regno == 25)
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1999-07-07 22:19:36 +02:00
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val = lseek (corechan, reg_offset + 4 * PC, 0);
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1999-04-16 03:35:26 +02:00
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if (val < 0
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|| (val = myread (corechan, buf, sizeof buf)) < 0)
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{
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1999-07-07 22:19:36 +02:00
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char *buffer = (char *) alloca (strlen (REGISTER_NAME (regno))
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+ 30);
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1999-04-16 03:35:26 +02:00
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strcpy (buffer, "Reading register ");
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strcat (buffer, REGISTER_NAME (regno));
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1999-07-07 22:19:36 +02:00
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1999-04-16 03:35:26 +02:00
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perror_with_name (buffer);
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}
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if (regno == PC_REGNUM)
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1999-07-07 22:19:36 +02:00
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*(int *) buf = GET_PC_PART (*(int *) buf);
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1999-04-16 03:35:26 +02:00
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supply_register (regno, buf);
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}
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}
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}
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if (filename[0] == '/')
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corefile = savestring (filename, strlen (filename));
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else
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{
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corefile = concat (current_directory, "/", filename, NULL);
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}
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flush_cached_frames ();
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select_frame (get_current_frame (), 0);
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validate_files ();
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}
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else if (from_tty)
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printf ("No core file now.\n");
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}
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#if 0
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/* Work with core dump and executable files, for GDB.
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This code would be in corefile.c if it weren't machine-dependent. */
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/* Structure to describe the chain of shared libraries used
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by the execfile.
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e.g. prog shares Xt which shares X11 which shares c. */
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1999-07-07 22:19:36 +02:00
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struct shared_library
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{
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struct exec_header header;
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char name[SHLIBLEN];
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CORE_ADDR text_start; /* CORE_ADDR of 1st byte of text, this file */
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long data_offset; /* offset of data section in file */
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int chan; /* file descriptor for the file */
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|
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struct shared_library *shares; /* library this one shares */
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1999-04-16 03:35:26 +02:00
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};
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static struct shared_library *shlib = 0;
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/* Hook for `exec_file_command' command to call. */
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extern void (*exec_file_display_hook) ();
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1999-07-07 22:19:36 +02:00
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1999-04-16 03:35:26 +02:00
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static CORE_ADDR unshared_text_start;
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/* extended header from exec file (for shared library info) */
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static struct exec_header exec_header;
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void
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exec_file_command (filename, from_tty)
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char *filename;
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int from_tty;
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{
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int val;
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/* Eliminate all traces of old exec file.
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Mark text segment as empty. */
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if (execfile)
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free (execfile);
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execfile = 0;
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data_start = 0;
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data_end -= exec_data_start;
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text_start = 0;
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unshared_text_start = 0;
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text_end = 0;
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exec_data_start = 0;
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exec_data_end = 0;
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if (execchan >= 0)
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close (execchan);
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execchan = -1;
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1999-07-07 22:19:36 +02:00
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if (shlib)
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{
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close_shared_library (shlib);
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1999-04-16 03:35:26 +02:00
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shlib = 0;
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1999-07-07 22:19:36 +02:00
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}
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1999-04-16 03:35:26 +02:00
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/* Now open and digest the file the user requested, if any. */
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if (filename)
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{
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filename = tilde_expand (filename);
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make_cleanup (free, filename);
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execchan = openp (getenv ("PATH"), 1, filename, O_RDONLY, 0,
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&execfile);
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if (execchan < 0)
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perror_with_name (filename);
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{
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struct stat st_exec;
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#ifdef HEADER_SEEK_FD
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HEADER_SEEK_FD (execchan);
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#endif
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1999-07-07 22:19:36 +02:00
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1999-04-16 03:35:26 +02:00
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val = myread (execchan, &exec_header, sizeof exec_header);
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exec_aouthdr = exec_header.a_exec;
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if (val < 0)
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perror_with_name (filename);
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text_start = 0x8000;
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/* Look for shared library if needed */
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if (exec_header.a_exec.a_magic & MF_USES_SL)
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1999-07-07 22:19:36 +02:00
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shlib = open_shared_library (exec_header.a_shlibname, text_start);
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1999-04-16 03:35:26 +02:00
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text_offset = N_TXTOFF (exec_aouthdr);
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exec_data_offset = N_TXTOFF (exec_aouthdr) + exec_aouthdr.a_text;
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1999-07-07 22:19:36 +02:00
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if (shlib)
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{
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unshared_text_start = shared_text_end (shlib) & ~0x7fff;
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1999-04-16 03:35:26 +02:00
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stack_start = shlib->header.a_exec.a_sldatabase;
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stack_end = STACK_END_ADDR;
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1999-07-07 22:19:36 +02:00
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}
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else
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unshared_text_start = 0x8000;
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1999-04-16 03:35:26 +02:00
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text_end = unshared_text_start + exec_aouthdr.a_text;
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exec_data_start = unshared_text_start + exec_aouthdr.a_text;
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1999-07-07 22:19:36 +02:00
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exec_data_end = exec_data_start + exec_aouthdr.a_data;
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1999-04-16 03:35:26 +02:00
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data_start = exec_data_start;
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data_end += exec_data_start;
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fstat (execchan, &st_exec);
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exec_mtime = st_exec.st_mtime;
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}
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validate_files ();
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}
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else if (from_tty)
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printf ("No executable file now.\n");
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/* Tell display code (if any) about the changed file name. */
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if (exec_file_display_hook)
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(*exec_file_display_hook) (filename);
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}
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#endif
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#if 0
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/* Read from the program's memory (except for inferior processes).
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This function is misnamed, since it only reads, never writes; and
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since it will use the core file and/or executable file as necessary.
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It should be extended to write as well as read, FIXME, for patching files.
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Return 0 if address could be read, EIO if addresss out of bounds. */
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int
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xfer_core_file (memaddr, myaddr, len)
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CORE_ADDR memaddr;
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char *myaddr;
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|
int len;
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{
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register int i;
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register int val;
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|
int xferchan;
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|
char **xferfile;
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|
int fileptr;
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|
int returnval = 0;
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while (len > 0)
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{
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xferfile = 0;
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xferchan = 0;
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/* Determine which file the next bunch of addresses reside in,
|
1999-07-07 22:19:36 +02:00
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and where in the file. Set the file's read/write pointer
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to point at the proper place for the desired address
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and set xferfile and xferchan for the correct file.
|
1999-04-16 03:35:26 +02:00
|
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|
1999-07-07 22:19:36 +02:00
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|
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If desired address is nonexistent, leave them zero.
|
1999-04-16 03:35:26 +02:00
|
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|
1999-07-07 22:19:36 +02:00
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i is set to the number of bytes that can be handled
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|
along with the next address.
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1999-04-16 03:35:26 +02:00
|
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|
1999-07-07 22:19:36 +02:00
|
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|
|
We put the most likely tests first for efficiency. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
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|
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|
|
/* Note that if there is no core file
|
1999-07-07 22:19:36 +02:00
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|
data_start and data_end are equal. */
|
1999-04-16 03:35:26 +02:00
|
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|
if (memaddr >= data_start && memaddr < data_end)
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{
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|
i = min (len, data_end - memaddr);
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|
|
fileptr = memaddr - data_start + data_offset;
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|
|
xferfile = &corefile;
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|
|
xferchan = corechan;
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|
|
|
|
}
|
|
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|
|
/* Note that if there is no core file
|
1999-07-07 22:19:36 +02:00
|
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|
|
stack_start and stack_end define the shared library data. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
else if (memaddr >= stack_start && memaddr < stack_end)
|
|
|
|
|
{
|
1999-07-07 22:19:36 +02:00
|
|
|
|
if (corechan < 0)
|
|
|
|
|
{
|
|
|
|
|
struct shared_library *lib;
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|
|
|
for (lib = shlib; lib; lib = lib->shares)
|
|
|
|
|
if (memaddr >= lib->header.a_exec.a_sldatabase &&
|
|
|
|
|
memaddr < lib->header.a_exec.a_sldatabase +
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|
|
|
|
lib->header.a_exec.a_data)
|
|
|
|
|
break;
|
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|
|
if (lib)
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|
|
|
|
{
|
|
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|
|
i = min (len, lib->header.a_exec.a_sldatabase +
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|
|
|
|
lib->header.a_exec.a_data - memaddr);
|
|
|
|
|
fileptr = lib->data_offset + memaddr -
|
|
|
|
|
lib->header.a_exec.a_sldatabase;
|
|
|
|
|
xferfile = execfile;
|
|
|
|
|
xferchan = lib->chan;
|
1999-04-16 03:35:26 +02:00
|
|
|
|
}
|
1999-07-07 22:19:36 +02:00
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
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|
|
i = min (len, stack_end - memaddr);
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|
|
|
fileptr = memaddr - stack_start + stack_offset;
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|
|
|
xferfile = &corefile;
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|
|
|
|
xferchan = corechan;
|
1999-04-16 03:35:26 +02:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
else if (corechan < 0
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|
|
&& memaddr >= exec_data_start && memaddr < exec_data_end)
|
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|
|
|
{
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|
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i = min (len, exec_data_end - memaddr);
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|
|
fileptr = memaddr - exec_data_start + exec_data_offset;
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|
|
xferfile = &execfile;
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|
|
|
xferchan = execchan;
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|
|
|
}
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|
|
|
else if (memaddr >= text_start && memaddr < text_end)
|
|
|
|
|
{
|
1999-07-07 22:19:36 +02:00
|
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|
|
struct shared_library *lib;
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|
|
|
for (lib = shlib; lib; lib = lib->shares)
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|
|
|
|
if (memaddr >= lib->text_start &&
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|
|
memaddr < lib->text_start + lib->header.a_exec.a_text)
|
|
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|
|
break;
|
|
|
|
|
if (lib)
|
|
|
|
|
{
|
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|
|
|
i = min (len, lib->header.a_exec.a_text +
|
|
|
|
|
lib->text_start - memaddr);
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|
|
fileptr = memaddr - lib->text_start + text_offset;
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|
|
|
xferfile = &execfile;
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|
|
|
xferchan = lib->chan;
|
|
|
|
|
}
|
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|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
i = min (len, text_end - memaddr);
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|
|
fileptr = memaddr - unshared_text_start + text_offset;
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|
|
xferfile = &execfile;
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|
|
|
xferchan = execchan;
|
1999-04-16 03:35:26 +02:00
|
|
|
|
}
|
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|
|
|
}
|
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|
|
|
else if (memaddr < text_start)
|
|
|
|
|
{
|
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|
|
|
i = min (len, text_start - memaddr);
|
|
|
|
|
}
|
|
|
|
|
else if (memaddr >= text_end
|
1999-07-07 22:19:36 +02:00
|
|
|
|
&& memaddr < (corechan >= 0 ? data_start : exec_data_start))
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
|
|
|
|
i = min (len, data_start - memaddr);
|
|
|
|
|
}
|
|
|
|
|
else if (corechan >= 0
|
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|
|
|
&& memaddr >= data_end && memaddr < stack_start)
|
|
|
|
|
{
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|
|
|
|
i = min (len, stack_start - memaddr);
|
|
|
|
|
}
|
|
|
|
|
else if (corechan < 0 && memaddr >= exec_data_end)
|
|
|
|
|
{
|
1999-07-07 22:19:36 +02:00
|
|
|
|
i = min (len, -memaddr);
|
1999-04-16 03:35:26 +02:00
|
|
|
|
}
|
|
|
|
|
else if (memaddr >= stack_end && stack_end != 0)
|
|
|
|
|
{
|
1999-07-07 22:19:36 +02:00
|
|
|
|
i = min (len, -memaddr);
|
1999-04-16 03:35:26 +02:00
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
/* Address did not classify into one of the known ranges.
|
|
|
|
|
This shouldn't happen; we catch the endpoints. */
|
|
|
|
|
fatal ("Internal: Bad case logic in xfer_core_file.");
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Now we know which file to use.
|
1999-07-07 22:19:36 +02:00
|
|
|
|
Set up its pointer and transfer the data. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
if (xferfile)
|
|
|
|
|
{
|
|
|
|
|
if (*xferfile == 0)
|
|
|
|
|
if (xferfile == &execfile)
|
|
|
|
|
error ("No program file to examine.");
|
|
|
|
|
else
|
|
|
|
|
error ("No core dump file or running program to examine.");
|
|
|
|
|
val = lseek (xferchan, fileptr, 0);
|
|
|
|
|
if (val < 0)
|
|
|
|
|
perror_with_name (*xferfile);
|
|
|
|
|
val = myread (xferchan, myaddr, i);
|
|
|
|
|
if (val < 0)
|
|
|
|
|
perror_with_name (*xferfile);
|
|
|
|
|
}
|
|
|
|
|
/* If this address is for nonexistent memory,
|
1999-07-07 22:19:36 +02:00
|
|
|
|
read zeros if reading, or do nothing if writing.
|
|
|
|
|
Actually, we never right. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
memset (myaddr, '\0', i);
|
|
|
|
|
returnval = EIO;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
memaddr += i;
|
|
|
|
|
myaddr += i;
|
|
|
|
|
len -= i;
|
|
|
|
|
}
|
|
|
|
|
return returnval;
|
|
|
|
|
}
|
|
|
|
|
#endif
|