d747e0af3d
* All GDB files that #include defs.h: Removed stdio.h. (defs.h): #include stdio.h. This has been tested by building GDBs for all targets hosted on Sun4. None of the build problems were related to stdio.h inclusion. (n.b. many configurations don't build for other reasons.)
272 lines
7.7 KiB
C
272 lines
7.7 KiB
C
/* 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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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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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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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., 675 Mass Ave, Cambridge, MA 02139, USA. */
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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 <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; /* Original value discarded */
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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, 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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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, 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, NULL);
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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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