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https://sourceware.org/git/binutils-gdb.git
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db728ff7cd
* gdbserver/low-hppabsd.c, gdbserver/low-lynx.c,
gdbserver/low-nbsd.c, gdbserver/low-sim.c,
gdbserver/low-sparc.c, gdbserver/low-sun3.c,
gdbserver/low-linux.c, gdbserver/server.c: Correct copyright notices.
600 lines
17 KiB
C
600 lines
17 KiB
C
/* Low level interface to ptrace, for the remote server for GDB.
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Copyright 1986, 1987, 1993, 2000, 2001, 2002 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "server.h"
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#include <sys/types.h>
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#include <sys/wait.h>
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#include "frame.h"
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#include "inferior.h"
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#include <stdio.h>
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#include <errno.h>
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/***************Begin MY defs*********************/
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static char my_registers[REGISTER_BYTES];
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char *registers = my_registers;
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/***************End MY defs*********************/
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#include <sys/ptrace.h>
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#include <machine/reg.h>
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#define RF(dst, src) \
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memcpy(®isters[REGISTER_BYTE(dst)], &src, sizeof(src))
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#define RS(src, dst) \
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memcpy(&dst, ®isters[REGISTER_BYTE(src)], sizeof(dst))
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#ifdef __i386__
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struct env387
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{
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unsigned short control;
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unsigned short r0;
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unsigned short status;
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unsigned short r1;
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unsigned short tag;
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unsigned short r2;
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unsigned long eip;
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unsigned short code_seg;
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unsigned short opcode;
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unsigned long operand;
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unsigned short operand_seg;
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unsigned short r3;
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unsigned char regs[8][10];
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};
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/* i386_register_raw_size[i] is the number of bytes of storage in the
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actual machine representation for register i. */
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int i386_register_raw_size[MAX_NUM_REGS] = {
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4, 4, 4, 4,
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4, 4, 4, 4,
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4, 4, 4, 4,
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4, 4, 4, 4,
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10, 10, 10, 10,
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10, 10, 10, 10,
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4, 4, 4, 4,
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4, 4, 4, 4,
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16, 16, 16, 16,
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16, 16, 16, 16,
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4
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};
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int i386_register_byte[MAX_NUM_REGS];
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static void
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initialize_arch (void)
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{
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/* Initialize the table saying where each register starts in the
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register file. */
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{
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int i, offset;
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offset = 0;
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for (i = 0; i < MAX_NUM_REGS; i++)
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{
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i386_register_byte[i] = offset;
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offset += i386_register_raw_size[i];
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}
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}
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}
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#endif /* !__i386__ */
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#ifdef __m68k__
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static void
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initialize_arch (void)
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{
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}
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#endif /* !__m68k__ */
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#ifdef __ns32k__
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static void
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initialize_arch (void)
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{
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}
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#endif /* !__ns32k__ */
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#ifdef __powerpc__
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#include "ppc-tdep.h"
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static void
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initialize_arch (void)
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{
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}
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#endif /* !__powerpc__ */
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/* Start an inferior process and returns its pid.
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ALLARGS is a vector of program-name and args. */
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int
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create_inferior (char *program, char **allargs)
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{
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int pid;
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pid = fork ();
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if (pid < 0)
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perror_with_name ("fork");
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if (pid == 0)
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{
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ptrace (PT_TRACE_ME, 0, 0, 0);
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execv (program, allargs);
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fprintf (stderr, "Cannot exec %s: %s.\n", program,
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errno < sys_nerr ? sys_errlist[errno] : "unknown error");
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fflush (stderr);
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_exit (0177);
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}
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return pid;
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}
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/* Attaching is not supported. */
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int
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myattach (int pid)
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{
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return -1;
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}
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/* Kill the inferior process. Make us have no inferior. */
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void
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kill_inferior (void)
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{
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if (inferior_pid == 0)
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return;
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ptrace (PT_KILL, inferior_pid, 0, 0);
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wait (0);
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/*************inferior_died ();****VK**************/
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}
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/* Return nonzero if the given thread is still alive. */
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int
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mythread_alive (int pid)
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{
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return 1;
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}
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/* Wait for process, returns status */
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unsigned char
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mywait (char *status)
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{
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int pid;
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int w;
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enable_async_io ();
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pid = waitpid (inferior_pid, &w, 0);
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disable_async_io ();
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if (pid != inferior_pid)
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perror_with_name ("wait");
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if (WIFEXITED (w))
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{
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fprintf (stderr, "\nChild exited with retcode = %x \n", WEXITSTATUS (w));
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*status = 'W';
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return ((unsigned char) WEXITSTATUS (w));
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}
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else if (!WIFSTOPPED (w))
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{
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fprintf (stderr, "\nChild terminated with signal = %x \n", WTERMSIG (w));
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*status = 'X';
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return ((unsigned char) WTERMSIG (w));
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}
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fetch_inferior_registers (0);
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*status = 'T';
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return ((unsigned char) WSTOPSIG (w));
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}
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/* Resume execution of the inferior process.
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If STEP is nonzero, single-step it.
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If SIGNAL is nonzero, give it that signal. */
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void
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myresume (int step, int signal)
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{
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errno = 0;
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ptrace (step ? PT_STEP : PT_CONTINUE, inferior_pid,
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(PTRACE_ARG3_TYPE) 1, signal);
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if (errno)
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perror_with_name ("ptrace");
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}
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#ifdef __i386__
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/* Fetch one or more registers from the inferior. REGNO == -1 to get
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them all. We actually fetch more than requested, when convenient,
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marking them as valid so we won't fetch them again. */
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void
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fetch_inferior_registers (int ignored)
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{
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struct reg inferior_registers;
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struct env387 inferior_fp_registers;
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ptrace (PT_GETREGS, inferior_pid,
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(PTRACE_ARG3_TYPE) &inferior_registers, 0);
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ptrace (PT_GETFPREGS, inferior_pid,
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(PTRACE_ARG3_TYPE) &inferior_fp_registers, 0);
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RF ( 0, inferior_registers.r_eax);
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RF ( 1, inferior_registers.r_ecx);
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RF ( 2, inferior_registers.r_edx);
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RF ( 3, inferior_registers.r_ebx);
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RF ( 4, inferior_registers.r_esp);
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RF ( 5, inferior_registers.r_ebp);
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RF ( 6, inferior_registers.r_esi);
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RF ( 7, inferior_registers.r_edi);
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RF ( 8, inferior_registers.r_eip);
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RF ( 9, inferior_registers.r_eflags);
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RF (10, inferior_registers.r_cs);
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RF (11, inferior_registers.r_ss);
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RF (12, inferior_registers.r_ds);
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RF (13, inferior_registers.r_es);
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RF (14, inferior_registers.r_fs);
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RF (15, inferior_registers.r_gs);
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RF (FP0_REGNUM, inferior_fp_registers.regs[0]);
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RF (FP0_REGNUM + 1, inferior_fp_registers.regs[1]);
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RF (FP0_REGNUM + 2, inferior_fp_registers.regs[2]);
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RF (FP0_REGNUM + 3, inferior_fp_registers.regs[3]);
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RF (FP0_REGNUM + 4, inferior_fp_registers.regs[4]);
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RF (FP0_REGNUM + 5, inferior_fp_registers.regs[5]);
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RF (FP0_REGNUM + 6, inferior_fp_registers.regs[6]);
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RF (FP0_REGNUM + 7, inferior_fp_registers.regs[7]);
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RF (FCTRL_REGNUM, inferior_fp_registers.control);
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RF (FSTAT_REGNUM, inferior_fp_registers.status);
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RF (FTAG_REGNUM, inferior_fp_registers.tag);
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RF (FCS_REGNUM, inferior_fp_registers.code_seg);
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RF (FCOFF_REGNUM, inferior_fp_registers.eip);
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RF (FDS_REGNUM, inferior_fp_registers.operand_seg);
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RF (FDOFF_REGNUM, inferior_fp_registers.operand);
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RF (FOP_REGNUM, inferior_fp_registers.opcode);
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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 (int ignored)
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{
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struct reg inferior_registers;
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struct env387 inferior_fp_registers;
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RS ( 0, inferior_registers.r_eax);
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RS ( 1, inferior_registers.r_ecx);
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RS ( 2, inferior_registers.r_edx);
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RS ( 3, inferior_registers.r_ebx);
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RS ( 4, inferior_registers.r_esp);
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RS ( 5, inferior_registers.r_ebp);
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RS ( 6, inferior_registers.r_esi);
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RS ( 7, inferior_registers.r_edi);
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RS ( 8, inferior_registers.r_eip);
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RS ( 9, inferior_registers.r_eflags);
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RS (10, inferior_registers.r_cs);
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RS (11, inferior_registers.r_ss);
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RS (12, inferior_registers.r_ds);
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RS (13, inferior_registers.r_es);
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RS (14, inferior_registers.r_fs);
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RS (15, inferior_registers.r_gs);
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RS (FP0_REGNUM, inferior_fp_registers.regs[0]);
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RS (FP0_REGNUM + 1, inferior_fp_registers.regs[1]);
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RS (FP0_REGNUM + 2, inferior_fp_registers.regs[2]);
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RS (FP0_REGNUM + 3, inferior_fp_registers.regs[3]);
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RS (FP0_REGNUM + 4, inferior_fp_registers.regs[4]);
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RS (FP0_REGNUM + 5, inferior_fp_registers.regs[5]);
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RS (FP0_REGNUM + 6, inferior_fp_registers.regs[6]);
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RS (FP0_REGNUM + 7, inferior_fp_registers.regs[7]);
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RS (FCTRL_REGNUM, inferior_fp_registers.control);
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RS (FSTAT_REGNUM, inferior_fp_registers.status);
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RS (FTAG_REGNUM, inferior_fp_registers.tag);
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RS (FCS_REGNUM, inferior_fp_registers.code_seg);
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RS (FCOFF_REGNUM, inferior_fp_registers.eip);
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RS (FDS_REGNUM, inferior_fp_registers.operand_seg);
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RS (FDOFF_REGNUM, inferior_fp_registers.operand);
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RS (FOP_REGNUM, inferior_fp_registers.opcode);
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ptrace (PT_SETREGS, inferior_pid,
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(PTRACE_ARG3_TYPE) &inferior_registers, 0);
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ptrace (PT_SETFPREGS, inferior_pid,
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(PTRACE_ARG3_TYPE) &inferior_fp_registers, 0);
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}
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#endif /* !__i386__ */
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#ifdef __m68k__
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/* Fetch one or more registers from the inferior. REGNO == -1 to get
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them all. We actually fetch more than requested, when convenient,
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marking them as valid so we won't fetch them again. */
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void
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fetch_inferior_registers (int regno)
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{
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struct reg inferior_registers;
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struct fpreg inferior_fp_registers;
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ptrace (PT_GETREGS, inferior_pid,
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(PTRACE_ARG3_TYPE) & inferior_registers, 0);
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memcpy (®isters[REGISTER_BYTE (0)], &inferior_registers,
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sizeof (inferior_registers));
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ptrace (PT_GETFPREGS, inferior_pid,
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(PTRACE_ARG3_TYPE) & inferior_fp_registers, 0);
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memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)], &inferior_fp_registers,
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sizeof (inferior_fp_registers));
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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 (int regno)
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{
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struct reg inferior_registers;
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struct fpreg inferior_fp_registers;
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memcpy (&inferior_registers, ®isters[REGISTER_BYTE (0)],
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sizeof (inferior_registers));
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ptrace (PT_SETREGS, inferior_pid,
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(PTRACE_ARG3_TYPE) & inferior_registers, 0);
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memcpy (&inferior_fp_registers, ®isters[REGISTER_BYTE (FP0_REGNUM)],
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sizeof (inferior_fp_registers));
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ptrace (PT_SETFPREGS, inferior_pid,
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(PTRACE_ARG3_TYPE) & inferior_fp_registers, 0);
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}
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#endif /* !__m68k__ */
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#ifdef __ns32k__
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/* Fetch one or more registers from the inferior. REGNO == -1 to get
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them all. We actually fetch more than requested, when convenient,
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marking them as valid so we won't fetch them again. */
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void
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fetch_inferior_registers (int regno)
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{
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struct reg inferior_registers;
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struct fpreg inferior_fpregisters;
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ptrace (PT_GETREGS, inferior_pid,
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(PTRACE_ARG3_TYPE) & inferior_registers, 0);
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ptrace (PT_GETFPREGS, inferior_pid,
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(PTRACE_ARG3_TYPE) & inferior_fpregisters, 0);
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RF (R0_REGNUM + 0, inferior_registers.r_r0);
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RF (R0_REGNUM + 1, inferior_registers.r_r1);
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RF (R0_REGNUM + 2, inferior_registers.r_r2);
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RF (R0_REGNUM + 3, inferior_registers.r_r3);
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RF (R0_REGNUM + 4, inferior_registers.r_r4);
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RF (R0_REGNUM + 5, inferior_registers.r_r5);
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RF (R0_REGNUM + 6, inferior_registers.r_r6);
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RF (R0_REGNUM + 7, inferior_registers.r_r7);
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RF (SP_REGNUM, inferior_registers.r_sp);
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RF (FP_REGNUM, inferior_registers.r_fp);
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RF (PC_REGNUM, inferior_registers.r_pc);
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RF (PS_REGNUM, inferior_registers.r_psr);
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RF (FPS_REGNUM, inferior_fpregisters.r_fsr);
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RF (FP0_REGNUM + 0, inferior_fpregisters.r_freg[0]);
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RF (FP0_REGNUM + 2, inferior_fpregisters.r_freg[2]);
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RF (FP0_REGNUM + 4, inferior_fpregisters.r_freg[4]);
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RF (FP0_REGNUM + 6, inferior_fpregisters.r_freg[6]);
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RF (LP0_REGNUM + 1, inferior_fpregisters.r_freg[1]);
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RF (LP0_REGNUM + 3, inferior_fpregisters.r_freg[3]);
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RF (LP0_REGNUM + 5, inferior_fpregisters.r_freg[5]);
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RF (LP0_REGNUM + 7, inferior_fpregisters.r_freg[7]);
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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 (int regno)
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{
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struct reg inferior_registers;
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struct fpreg inferior_fpregisters;
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RS (R0_REGNUM + 0, inferior_registers.r_r0);
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RS (R0_REGNUM + 1, inferior_registers.r_r1);
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RS (R0_REGNUM + 2, inferior_registers.r_r2);
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RS (R0_REGNUM + 3, inferior_registers.r_r3);
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RS (R0_REGNUM + 4, inferior_registers.r_r4);
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RS (R0_REGNUM + 5, inferior_registers.r_r5);
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RS (R0_REGNUM + 6, inferior_registers.r_r6);
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RS (R0_REGNUM + 7, inferior_registers.r_r7);
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RS (SP_REGNUM, inferior_registers.r_sp);
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RS (FP_REGNUM, inferior_registers.r_fp);
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RS (PC_REGNUM, inferior_registers.r_pc);
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RS (PS_REGNUM, inferior_registers.r_psr);
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RS (FPS_REGNUM, inferior_fpregisters.r_fsr);
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RS (FP0_REGNUM + 0, inferior_fpregisters.r_freg[0]);
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RS (FP0_REGNUM + 2, inferior_fpregisters.r_freg[2]);
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RS (FP0_REGNUM + 4, inferior_fpregisters.r_freg[4]);
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RS (FP0_REGNUM + 6, inferior_fpregisters.r_freg[6]);
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RS (LP0_REGNUM + 1, inferior_fpregisters.r_freg[1]);
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RS (LP0_REGNUM + 3, inferior_fpregisters.r_freg[3]);
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RS (LP0_REGNUM + 5, inferior_fpregisters.r_freg[5]);
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RS (LP0_REGNUM + 7, inferior_fpregisters.r_freg[7]);
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ptrace (PT_SETREGS, inferior_pid,
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(PTRACE_ARG3_TYPE) & inferior_registers, 0);
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ptrace (PT_SETFPREGS, inferior_pid,
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(PTRACE_ARG3_TYPE) & inferior_fpregisters, 0);
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}
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#endif /* !__ns32k__ */
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#ifdef __powerpc__
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/* Fetch one or more registers from the inferior. REGNO == -1 to get
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them all. We actually fetch more than requested, when convenient,
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marking them as valid so we won't fetch them again. */
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void
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fetch_inferior_registers (int regno)
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{
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struct reg inferior_registers;
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#ifdef PT_GETFPREGS
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struct fpreg inferior_fp_registers;
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#endif
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int i;
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ptrace (PT_GETREGS, inferior_pid,
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(PTRACE_ARG3_TYPE) & inferior_registers, 0);
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for (i = 0; i < 32; i++)
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RF (i, inferior_registers.fixreg[i]);
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RF (PPC_LR_REGNUM, inferior_registers.lr);
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RF (PPC_CR_REGNUM, inferior_registers.cr);
|
||
RF (PPC_XER_REGNUM, inferior_registers.xer);
|
||
RF (PPC_CTR_REGNUM, inferior_registers.ctr);
|
||
RF (PC_REGNUM, inferior_registers.pc);
|
||
|
||
#ifdef PT_GETFPREGS
|
||
ptrace (PT_GETFPREGS, inferior_pid,
|
||
(PTRACE_ARG3_TYPE) & inferior_fp_registers, 0);
|
||
for (i = 0; i < 32; i++)
|
||
RF (FP0_REGNUM + i, inferior_fp_registers.r_regs[i]);
|
||
#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 (int regno)
|
||
{
|
||
struct reg inferior_registers;
|
||
#ifdef PT_SETFPREGS
|
||
struct fpreg inferior_fp_registers;
|
||
#endif
|
||
int i;
|
||
|
||
for (i = 0; i < 32; i++)
|
||
RS (i, inferior_registers.fixreg[i]);
|
||
RS (PPC_LR_REGNUM, inferior_registers.lr);
|
||
RS (PPC_CR_REGNUM, inferior_registers.cr);
|
||
RS (PPC_XER_REGNUM, inferior_registers.xer);
|
||
RS (PPC_CTR_REGNUM, inferior_registers.ctr);
|
||
RS (PC_REGNUM, inferior_registers.pc);
|
||
ptrace (PT_SETREGS, inferior_pid,
|
||
(PTRACE_ARG3_TYPE) & inferior_registers, 0);
|
||
|
||
#ifdef PT_SETFPREGS
|
||
for (i = 0; i < 32; i++)
|
||
RS (FP0_REGNUM + i, inferior_fp_registers.r_regs[i]);
|
||
ptrace (PT_SETFPREGS, inferior_pid,
|
||
(PTRACE_ARG3_TYPE) & inferior_fp_registers, 0);
|
||
#endif
|
||
}
|
||
#endif /* !__powerpc__ */
|
||
|
||
/* 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 from inferior's memory starting at MEMADDR
|
||
to debugger memory starting at MYADDR. */
|
||
|
||
void
|
||
read_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len)
|
||
{
|
||
register int i;
|
||
/* Round starting address down to longword boundary. */
|
||
register CORE_ADDR addr = memaddr & -(CORE_ADDR) 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));
|
||
|
||
/* Read all the longwords */
|
||
for (i = 0; i < count; i++, addr += sizeof (int))
|
||
{
|
||
buffer[i] = ptrace (PT_READ_D, inferior_pid, (PTRACE_ARG3_TYPE) addr, 0);
|
||
}
|
||
|
||
/* Copy appropriate bytes out of the buffer. */
|
||
memcpy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len);
|
||
}
|
||
|
||
/* Copy LEN bytes of data from debugger memory at MYADDR
|
||
to inferior's memory at MEMADDR.
|
||
On failure (cannot write the inferior)
|
||
returns the value of errno. */
|
||
|
||
int
|
||
write_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len)
|
||
{
|
||
register int i;
|
||
/* Round starting address down to longword boundary. */
|
||
register CORE_ADDR addr = memaddr & -(CORE_ADDR) 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));
|
||
extern int errno;
|
||
|
||
/* Fill start and end extra bytes of buffer with existing memory data. */
|
||
|
||
buffer[0] = ptrace (PT_READ_D, inferior_pid, (PTRACE_ARG3_TYPE) addr, 0);
|
||
|
||
if (count > 1)
|
||
{
|
||
buffer[count - 1]
|
||
= ptrace (PT_READ_D, inferior_pid,
|
||
(PTRACE_ARG3_TYPE) addr + (count - 1) * sizeof (int), 0);
|
||
}
|
||
|
||
/* Copy data to be written over corresponding part of buffer */
|
||
|
||
memcpy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, 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)
|
||
return errno;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
void
|
||
initialize_low (void)
|
||
{
|
||
initialize_arch ();
|
||
}
|