Johns release
This commit is contained in:
K. Richard Pixley
parent
bd5635a1e2
commit
dd3b648e8b
246 changed files with 59132 additions and 0 deletions
274
gdb/arm-xdep.c
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274
gdb/arm-xdep.c
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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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This file is part of GDB.
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GDB 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 1, or (at your option)
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any later version.
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GDB 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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You should have received a copy of the GNU General Public License
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along with GDB; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "defs.h"
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#include "param.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 <stdio.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 <sys/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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int regno;
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{
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register int regno;
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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, offset, 0) - KERNEL_U_ADDR;
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registers_fetched ();
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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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*(int *)&buf[0] = ptrace (PT_READ_U, inferior_pid, regaddr, 0);
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if (regno == PC_REGNUM)
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*(int *)&buf[0] = GET_PC_PART(*(int *)&buf[0]);
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supply_register (regno, buf);
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}
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*(int *)&buf[0] = ptrace (PT_READ_U, inferior_pid, offset + PC*4);
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supply_register (PS_REGNUM, buf); /* set virtual register ps same as pc */
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/* read the floating point registers */
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offset = (char *) &u.u_fp_regs - (char *)&u;
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*(int *)buf = ptrace (PT_READ_U, inferior_pid, offset, 0);
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supply_register (FPS_REGNUM, buf);
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for (regno = 16; regno < 24; regno++) {
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regaddr = offset + 4 + 12 * (regno - 16);
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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, regaddr + i, 0);
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supply_register (regno, buf);
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}
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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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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, offset, 0) - KERNEL_U_ADDR;
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if (regno >= 0) {
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if (regno >= 16) return;
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regaddr = offset + 4 * regno;
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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 (PT_WRITE_U, inferior_pid, 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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else 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, 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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}
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/* Work with core dump and executable files, for GDB.
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This code would be in core.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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struct shared_library {
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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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};
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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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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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extern char registers[];
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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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if (have_inferior_p ())
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error ("To look at a core file, you must kill the inferior 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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fp_reg_offset = (char *) &u.u_fp_regs - (char *)&u;
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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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val = lseek (corechan, reg_offset + 4 * regno, 0);
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else if (regno < 24)
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val = lseek (corechan, fp_reg_offset + 4 + 12*(regno - 24), 0);
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else if (regno == 24)
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val = lseek (corechan, fp_reg_offset, 0);
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else if (regno == 25)
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val = lseek (corechan, reg_offset + 4 * PC, 0);
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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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char * buffer = (char *) alloca (strlen (reg_names[regno])
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+ 30);
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strcpy (buffer, "Reading register ");
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strcat (buffer, reg_names[regno]);
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perror_with_name (buffer);
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}
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if (regno == PC_REGNUM)
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*(int *)buf = GET_PC_PART(*(int *)buf);
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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);
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}
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set_current_frame ( create_new_frame (read_register (FP_REGNUM),
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read_pc ()));
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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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