1292 lines
32 KiB
C
1292 lines
32 KiB
C
/* Low level interface to ptrace, for GDB when running under Unix.
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Copyright (C) 1986, 1987, 1989 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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||
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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
|
||
GNU General Public License for more details.
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|
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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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#ifndef lint
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static char rcsid[] = "$Id: symmetry-dep.c,v 1.2 1993/08/02 17:40:23 mycroft Exp $";
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#endif /* not lint */
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/* many 387-specific items of use taken from i386-dep.c */
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#include <stdio.h>
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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 "symtab.h"
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#include <signal.h>
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#include <sys/param.h>
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#include <sys/user.h>
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#include <sys/dir.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <a.out.h>
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#include <fcntl.h>
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static long i386_get_frame_setup ();
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static i386_follow_jump ();
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/* XPT_DEBUG doesn't work yet under Dynix 3.0.12, but UNDEBUG does... */
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#define PTRACE_ATTACH XPT_DEBUG
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#define PTRACE_DETACH XPT_UNDEBUG
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#include <sgtty.h>
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#define TERMINAL struct sgttyb
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extern int errno;
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/* Nonzero if we are debugging an attached outside process
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rather than an inferior. */
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static int attach_flag;
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/* This function simply calls ptrace with the given arguments.
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It exists so that all calls to ptrace are isolated in this
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machine-dependent file. */
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int
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call_ptrace (request, pid, arg3, arg4)
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int request, pid, arg3, arg4;
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{
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return ptrace (request, pid, arg3, arg4);
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}
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kill_inferior ()
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{
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if (remote_debugging)
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return;
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if (inferior_pid == 0)
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return;
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ptrace (8, inferior_pid, 0, 0);
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wait (0);
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inferior_died ();
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}
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/* This is used when GDB is exiting. It gives less chance of error.*/
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kill_inferior_fast ()
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{
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if (remote_debugging)
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return;
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if (inferior_pid == 0)
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return;
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ptrace (8, inferior_pid, 0, 0);
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wait (0);
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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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resume (step, signal)
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int step;
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int signal;
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{
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errno = 0;
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if (remote_debugging)
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remote_resume (step, signal);
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else
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{
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ptrace (step ? 9 : 7, inferior_pid, 1, signal);
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if (errno)
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perror_with_name ("ptrace");
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}
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}
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#ifdef ATTACH_DETACH
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/* Start debugging the process whose number is PID. */
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attach (pid)
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int pid;
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{
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errno = 0;
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ptrace (PTRACE_ATTACH, pid, 0, 0);
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if (errno)
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perror_with_name ("ptrace");
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attach_flag = 1;
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return pid;
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}
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/* Stop debugging the process whose number is PID
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and continue it with signal number SIGNAL.
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SIGNAL = 0 means just continue it. */
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void
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detach (signal)
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int signal;
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{
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errno = 0;
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ptrace (PTRACE_DETACH, inferior_pid, 1, signal);
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if (errno)
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perror_with_name ("ptrace");
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attach_flag = 0;
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}
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#endif /* ATTACH_DETACH */
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store_inferior_registers(regno)
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int regno;
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{
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struct pt_regset regs;
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int reg_tmp, i;
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extern char registers[];
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if (-1 == regno)
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{
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regs.pr_eax = *(int *)®isters[REGISTER_BYTE(0)];
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regs.pr_ebx = *(int *)®isters[REGISTER_BYTE(5)];
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regs.pr_ecx = *(int *)®isters[REGISTER_BYTE(2)];
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regs.pr_edx = *(int *)®isters[REGISTER_BYTE(1)];
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regs.pr_esi = *(int *)®isters[REGISTER_BYTE(6)];
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regs.pr_edi = *(int *)®isters[REGISTER_BYTE(7)];
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regs.pr_esp = *(int *)®isters[REGISTER_BYTE(14)];
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regs.pr_ebp = *(int *)®isters[REGISTER_BYTE(15)];
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regs.pr_eip = *(int *)®isters[REGISTER_BYTE(16)];
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regs.pr_flags = *(int *)®isters[REGISTER_BYTE(17)];
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for (i = 0; i < 31; i++) {
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regs.pr_fpa.fpa_regs[i] =
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*(int *)®isters[REGISTER_BYTE(FP1_REGNUM+i)];
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}
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}
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else
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{
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reg_tmp = *(int *)®isters[REGISTER_BYTE(regno)];
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ptrace(XPT_RREGS, inferior_pid, ®s, 0);
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switch (regno)
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{
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case 0:
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regs.pr_eax = *(int *)®isters[REGISTER_BYTE(0)];
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break;
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case 5:
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regs.pr_ebx = *(int *)®isters[REGISTER_BYTE(5)];
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break;
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case 2:
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regs.pr_ecx = *(int *)®isters[REGISTER_BYTE(2)];
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break;
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case 1:
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regs.pr_edx = *(int *)®isters[REGISTER_BYTE(1)];
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break;
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case 6:
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regs.pr_esi = *(int *)®isters[REGISTER_BYTE(6)];
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break;
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case 7:
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regs.pr_edi = *(int *)®isters[REGISTER_BYTE(7)];
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break;
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case 15:
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regs.pr_ebp = *(int *)®isters[REGISTER_BYTE(15)];
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break;
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case 14:
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regs.pr_esp = *(int *)®isters[REGISTER_BYTE(14)];
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break;
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case 16:
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regs.pr_eip = *(int *)®isters[REGISTER_BYTE(16)];
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break;
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case 17:
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regs.pr_flags = *(int *)®isters[REGISTER_BYTE(17)];
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break;
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}
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}
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ptrace(XPT_WREGS, inferior_pid, ®s, 0);
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}
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void
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fetch_inferior_registers()
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{
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int i;
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struct pt_regset regs;
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extern char registers[];
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ptrace(XPT_RREGS, inferior_pid, ®s, 0);
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*(int *)®isters[REGISTER_BYTE(0)] = regs.pr_eax;
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*(int *)®isters[REGISTER_BYTE(5)] = regs.pr_ebx;
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*(int *)®isters[REGISTER_BYTE(2)] = regs.pr_ecx;
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*(int *)®isters[REGISTER_BYTE(1)] = regs.pr_edx;
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*(int *)®isters[REGISTER_BYTE(6)] = regs.pr_esi;
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*(int *)®isters[REGISTER_BYTE(7)] = regs.pr_edi;
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*(int *)®isters[REGISTER_BYTE(15)] = regs.pr_ebp;
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*(int *)®isters[REGISTER_BYTE(14)] = regs.pr_esp;
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*(int *)®isters[REGISTER_BYTE(16)] = regs.pr_eip;
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*(int *)®isters[REGISTER_BYTE(17)] = regs.pr_flags;
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for (i = 0; i < FPA_NREGS; i++) {
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*(int *)®isters[REGISTER_BYTE(FP1_REGNUM+i)] = regs.pr_fpa.fpa_regs[i];
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}
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bcopy(regs.pr_fpu.fpu_stack[0], ®isters[REGISTER_BYTE(3)], 10);
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bcopy(regs.pr_fpu.fpu_stack[1], ®isters[REGISTER_BYTE(4)], 10);
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bcopy(regs.pr_fpu.fpu_stack[2], ®isters[REGISTER_BYTE(8)], 10);
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bcopy(regs.pr_fpu.fpu_stack[3], ®isters[REGISTER_BYTE(9)], 10);
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bcopy(regs.pr_fpu.fpu_stack[4], ®isters[REGISTER_BYTE(10)], 10);
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bcopy(regs.pr_fpu.fpu_stack[5], ®isters[REGISTER_BYTE(11)], 10);
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bcopy(regs.pr_fpu.fpu_stack[6], ®isters[REGISTER_BYTE(12)], 10);
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bcopy(regs.pr_fpu.fpu_stack[7], ®isters[REGISTER_BYTE(13)], 10);
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}
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/* Copy LEN bytes from inferior's memory starting at MEMADDR
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to debugger memory starting at MYADDR. */
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read_inferior_memory (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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/* Round starting address down to longword boundary. */
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register CORE_ADDR addr = memaddr & - sizeof (int);
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/* Round ending address up; get number of longwords that makes. */
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register int count
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= (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int);
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/* Allocate buffer of that many longwords. */
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register int *buffer = (int *) alloca (count * sizeof (int));
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/* Read all the longwords */
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for (i = 0; i < count; i++, addr += sizeof (int)) {
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errno = 0;
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if (remote_debugging)
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buffer[i] = remote_fetch_word (addr);
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else
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buffer[i] = ptrace (1, inferior_pid, addr, 0);
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if (errno)
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return errno;
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}
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/* Copy appropriate bytes out of the buffer. */
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bcopy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len);
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return 0;
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}
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/* Copy LEN bytes of data from debugger memory at MYADDR
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to inferior's memory at MEMADDR.
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On failure (cannot write the inferior)
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returns the value of errno. */
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int
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write_inferior_memory (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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/* Round starting address down to longword boundary. */
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register CORE_ADDR addr = memaddr & - sizeof (int);
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/* Round ending address up; get number of longwords that makes. */
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register int count
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= (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int);
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/* Allocate buffer of that many longwords. */
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register int *buffer = (int *) alloca (count * sizeof (int));
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extern int errno;
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/* Fill start and end extra bytes of buffer with existing memory data. */
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if (remote_debugging)
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buffer[0] = remote_fetch_word (addr);
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else
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buffer[0] = ptrace (1, inferior_pid, addr, 0);
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if (count > 1)
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{
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if (remote_debugging)
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buffer[count - 1]
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= remote_fetch_word (addr + (count - 1) * sizeof (int));
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else
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buffer[count - 1]
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= ptrace (1, inferior_pid,
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addr + (count - 1) * sizeof (int), 0);
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}
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/* Copy data to be written over corresponding part of buffer */
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bcopy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len);
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/* Write the entire buffer. */
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for (i = 0; i < count; i++, addr += sizeof (int))
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{
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errno = 0;
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if (remote_debugging)
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remote_store_word (addr, buffer[i]);
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else
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ptrace (4, inferior_pid, addr, buffer[i]);
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if (errno)
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return errno;
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}
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return 0;
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}
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/* Recognize COFF format systems because a.out.h defines AOUTHDR. */
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#ifdef AOUTHDR
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#define COFF_FORMAT
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#endif
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#ifndef N_TXTADDR
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#define N_TXTADDR(hdr) 0
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#endif /* no N_TXTADDR */
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#ifndef N_DATADDR
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#define N_DATADDR(hdr) hdr.a_text
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#endif /* no N_DATADDR */
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/* Make COFF and non-COFF names for things a little more compatible
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to reduce conditionals later. */
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#ifdef COFF_FORMAT
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#define a_magic magic
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#endif
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#ifndef COFF_FORMAT
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#define AOUTHDR struct exec
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#endif
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extern char *sys_siglist[];
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||
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/* Hook for `exec_file_command' command to call. */
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void (*exec_file_display_hook) ();
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/* File names of core file and executable file. */
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extern char *corefile;
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extern char *execfile;
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/* Descriptors on which core file and executable file are open.
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Note that the execchan is closed when an inferior is created
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and reopened if the inferior dies or is killed. */
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||
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extern int corechan;
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extern int execchan;
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/* Last modification time of executable file.
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Also used in source.c to compare against mtime of a source file. */
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||
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int exec_mtime;
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||
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/* Virtual addresses of bounds of the two areas of memory in the core file. */
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||
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extern CORE_ADDR data_start;
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extern CORE_ADDR data_end;
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||
extern CORE_ADDR stack_start;
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||
extern CORE_ADDR stack_end;
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||
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/* Virtual addresses of bounds of two areas of memory in the exec file.
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Note that the data area in the exec file is used only when there is no core file. */
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||
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extern CORE_ADDR text_start;
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extern CORE_ADDR text_end;
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||
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extern CORE_ADDR exec_data_start;
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||
extern CORE_ADDR exec_data_end;
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||
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/* Address in executable file of start of text area data. */
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||
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extern int text_offset;
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||
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/* Address in executable file of start of data area data. */
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||
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extern int exec_data_offset;
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||
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/* Address in core file of start of data area data. */
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||
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||
extern int data_offset;
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||
|
||
/* Address in core file of start of stack area data. */
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||
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||
extern int stack_offset;
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||
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||
#ifdef COFF_FORMAT
|
||
/* various coff data structures */
|
||
|
||
extern FILHDR file_hdr;
|
||
extern SCNHDR text_hdr;
|
||
extern SCNHDR data_hdr;
|
||
|
||
#endif /* not COFF_FORMAT */
|
||
|
||
/* a.out header saved in core file. */
|
||
|
||
extern AOUTHDR core_aouthdr;
|
||
|
||
/* a.out header of exec file. */
|
||
|
||
extern AOUTHDR exec_aouthdr;
|
||
|
||
extern void validate_files ();
|
||
unsigned int register_addr ();
|
||
|
||
core_file_command (filename, from_tty)
|
||
char *filename;
|
||
int from_tty;
|
||
{
|
||
int val;
|
||
extern char registers[];
|
||
|
||
/* Discard all vestiges of any previous core file
|
||
and mark data and stack spaces as empty. */
|
||
|
||
if (corefile)
|
||
free (corefile);
|
||
corefile = 0;
|
||
|
||
if (corechan >= 0)
|
||
close (corechan);
|
||
corechan = -1;
|
||
|
||
data_start = 0;
|
||
data_end = 0;
|
||
stack_start = STACK_END_ADDR;
|
||
stack_end = STACK_END_ADDR;
|
||
|
||
/* Now, if a new core file was specified, open it and digest it. */
|
||
|
||
if (filename)
|
||
{
|
||
filename = tilde_expand (filename);
|
||
make_cleanup (free, filename);
|
||
|
||
if (have_inferior_p ())
|
||
error ("To look at a core file, you must kill the inferior with \"kill\".");
|
||
corechan = open (filename, O_RDONLY, 0);
|
||
if (corechan < 0)
|
||
perror_with_name (filename);
|
||
/* 4.2-style (and perhaps also sysV-style) core dump file. */
|
||
{
|
||
struct user u;
|
||
int reg_offset;
|
||
|
||
val = myread (corechan, &u, sizeof u);
|
||
if (val < 0)
|
||
perror_with_name (filename);
|
||
data_start = exec_data_start;
|
||
|
||
data_end = data_start + NBPG * (u.u_dsize - u.u_tsize);
|
||
stack_start = stack_end - NBPG * u.u_ssize;
|
||
data_offset = NBPG * UPAGES;
|
||
stack_offset = ctob(UPAGES + u.u_dsize - u.u_tsize);
|
||
reg_offset = (int) u.u_ar0 - KERNEL_U_ADDR;
|
||
printf("u.u_tsize= %#x, u.u_dsize= %#x, u.u_ssize= %#x, stack_off= %#x\n",
|
||
u.u_tsize, u.u_dsize, u.u_ssize, stack_offset);
|
||
|
||
core_aouthdr.a_magic = 0;
|
||
|
||
/* Read the register values out of the core file and store
|
||
them where `read_register' will find them. */
|
||
|
||
{
|
||
register int regno;
|
||
|
||
for (regno = 0; regno < NUM_REGS; regno++)
|
||
{
|
||
char buf[MAX_REGISTER_RAW_SIZE];
|
||
|
||
val = lseek (corechan, register_addr (regno, reg_offset), 0);
|
||
if (val < 0)
|
||
perror_with_name (filename);
|
||
|
||
val = myread (corechan, buf, sizeof buf);
|
||
if (val < 0)
|
||
perror_with_name (filename);
|
||
supply_register (regno, buf);
|
||
}
|
||
}
|
||
}
|
||
if (filename[0] == '/')
|
||
corefile = savestring (filename, strlen (filename));
|
||
else
|
||
{
|
||
corefile = concat (current_directory, "/", filename);
|
||
}
|
||
|
||
set_current_frame(create_new_frame(read_register(FP_REGNUM),
|
||
read_pc()));
|
||
/* set_current_frame (read_register (FP_REGNUM));*/
|
||
select_frame (get_current_frame (), 0);
|
||
validate_files ();
|
||
}
|
||
else if (from_tty)
|
||
printf ("No core file now.\n");
|
||
}
|
||
|
||
exec_file_command (filename, from_tty)
|
||
char *filename;
|
||
int from_tty;
|
||
{
|
||
int val;
|
||
|
||
/* Eliminate all traces of old exec file.
|
||
Mark text segment as empty. */
|
||
|
||
if (execfile)
|
||
free (execfile);
|
||
execfile = 0;
|
||
data_start = 0;
|
||
data_end -= exec_data_start;
|
||
text_start = 0;
|
||
text_end = 0;
|
||
exec_data_start = 0;
|
||
exec_data_end = 0;
|
||
if (execchan >= 0)
|
||
close (execchan);
|
||
execchan = -1;
|
||
|
||
/* Now open and digest the file the user requested, if any. */
|
||
|
||
if (filename)
|
||
{
|
||
filename = tilde_expand (filename);
|
||
make_cleanup (free, filename);
|
||
|
||
execchan = openp (getenv ("PATH"), 1, filename, O_RDONLY, 0,
|
||
&execfile);
|
||
if (execchan < 0)
|
||
perror_with_name (filename);
|
||
|
||
#ifdef COFF_FORMAT
|
||
{
|
||
int aout_hdrsize;
|
||
int num_sections;
|
||
|
||
if (read_file_hdr (execchan, &file_hdr) < 0)
|
||
error ("\"%s\": not in executable format.", execfile);
|
||
|
||
aout_hdrsize = file_hdr.f_opthdr;
|
||
num_sections = file_hdr.f_nscns;
|
||
|
||
if (read_aout_hdr (execchan, &exec_aouthdr, aout_hdrsize) < 0)
|
||
error ("\"%s\": can't read optional aouthdr", execfile);
|
||
|
||
if (read_section_hdr (execchan, _TEXT, &text_hdr, num_sections,
|
||
aout_hdrsize) < 0)
|
||
error ("\"%s\": can't read text section header", execfile);
|
||
|
||
if (read_section_hdr (execchan, _DATA, &data_hdr, num_sections,
|
||
aout_hdrsize) < 0)
|
||
error ("\"%s\": can't read data section header", execfile);
|
||
|
||
text_start = exec_aouthdr.text_start;
|
||
text_end = text_start + exec_aouthdr.tsize;
|
||
text_offset = text_hdr.s_scnptr;
|
||
exec_data_start = exec_aouthdr.data_start;
|
||
exec_data_end = exec_data_start + exec_aouthdr.dsize;
|
||
exec_data_offset = data_hdr.s_scnptr;
|
||
data_start = exec_data_start;
|
||
data_end += exec_data_start;
|
||
exec_mtime = file_hdr.f_timdat;
|
||
}
|
||
#else /* not COFF_FORMAT */
|
||
{
|
||
struct stat st_exec;
|
||
|
||
val = myread (execchan, &exec_aouthdr, sizeof (AOUTHDR));
|
||
|
||
if (val < 0)
|
||
perror_with_name (filename);
|
||
|
||
text_start = N_ADDRADJ(exec_aouthdr);
|
||
exec_data_start = round(exec_aouthdr.a_text, NBPG*CLSIZE);
|
||
text_offset = N_TXTOFF (exec_aouthdr);
|
||
exec_data_offset = N_TXTOFF (exec_aouthdr) + exec_aouthdr.a_text;
|
||
text_end = exec_aouthdr.a_text;
|
||
exec_data_end = exec_data_start + exec_aouthdr.a_data;
|
||
data_start = exec_data_start;
|
||
data_end = data_start + exec_aouthdr.a_data;
|
||
exec_data_offset = N_TXTOFF(exec_aouthdr);
|
||
fstat (execchan, &st_exec);
|
||
exec_mtime = st_exec.st_mtime;
|
||
}
|
||
#endif /* not COFF_FORMAT */
|
||
|
||
validate_files ();
|
||
}
|
||
else if (from_tty)
|
||
printf ("No exec file now.\n");
|
||
|
||
/* Tell display code (if any) about the changed file name. */
|
||
if (exec_file_display_hook)
|
||
(*exec_file_display_hook) (filename);
|
||
}
|
||
|
||
/* rounds 'one' up to divide evenly by 'two' */
|
||
|
||
int
|
||
round(one,two)
|
||
register int one, two;
|
||
|
||
{
|
||
register int temp;
|
||
temp = (one/two)*two;
|
||
if (one != temp) {
|
||
temp += two;
|
||
}
|
||
return temp;
|
||
}
|
||
|
||
|
||
static CORE_ADDR codestream_next_addr;
|
||
static CORE_ADDR codestream_addr;
|
||
static unsigned char codestream_buf[sizeof (int)];
|
||
static int codestream_off;
|
||
static int codestream_cnt;
|
||
|
||
#define codestream_tell() (codestream_addr + codestream_off)
|
||
#define codestream_peek() (codestream_cnt == 0 ? \
|
||
codestream_fill(1): codestream_buf[codestream_off])
|
||
#define codestream_get() (codestream_cnt-- == 0 ? \
|
||
codestream_fill(0) : codestream_buf[codestream_off++])
|
||
|
||
|
||
static unsigned char
|
||
codestream_fill (peek_flag)
|
||
{
|
||
codestream_addr = codestream_next_addr;
|
||
codestream_next_addr += sizeof (int);
|
||
codestream_off = 0;
|
||
codestream_cnt = sizeof (int);
|
||
read_memory (codestream_addr,
|
||
(unsigned char *)codestream_buf,
|
||
sizeof (int));
|
||
|
||
if (peek_flag)
|
||
return (codestream_peek());
|
||
else
|
||
return (codestream_get());
|
||
}
|
||
|
||
static void
|
||
codestream_seek (place)
|
||
{
|
||
codestream_next_addr = place & -sizeof (int);
|
||
codestream_cnt = 0;
|
||
codestream_fill (1);
|
||
while (codestream_tell() != place)
|
||
codestream_get ();
|
||
}
|
||
|
||
static void
|
||
codestream_read (buf, count)
|
||
unsigned char *buf;
|
||
{
|
||
unsigned char *p;
|
||
int i;
|
||
p = buf;
|
||
for (i = 0; i < count; i++)
|
||
*p++ = codestream_get ();
|
||
}
|
||
|
||
/*
|
||
* Following macro translates i386 opcode register numbers to Symmetry
|
||
* register numbers. This is used by FRAME_FIND_SAVED_REGS.
|
||
*
|
||
* %eax %ecx %edx %ebx %esp %ebp %esi %edi
|
||
* i386 0 1 2 3 4 5 6 7
|
||
* Symmetry 0 2 1 5 14 15 6 7
|
||
*
|
||
*/
|
||
#define I386_REGNO_TO_SYMMETRY(n) \
|
||
((n)==0?0 :(n)==1?2 :(n)==2?1 :(n)==3?5 :(n)==4?14 :(n)==5?15 :(n))
|
||
|
||
/* from i386-dep.c */
|
||
i386_frame_find_saved_regs (fip, fsrp)
|
||
struct frame_info *fip;
|
||
struct frame_saved_regs *fsrp;
|
||
{
|
||
unsigned long locals;
|
||
unsigned char *p;
|
||
unsigned char op;
|
||
CORE_ADDR dummy_bottom;
|
||
CORE_ADDR adr;
|
||
int i;
|
||
|
||
bzero (fsrp, sizeof *fsrp);
|
||
|
||
/* if frame is the end of a dummy, compute where the
|
||
* beginning would be
|
||
*/
|
||
dummy_bottom = fip->frame - 4 - NUM_REGS*4 - CALL_DUMMY_LENGTH;
|
||
|
||
/* check if the PC is in the stack, in a dummy frame */
|
||
if (dummy_bottom <= fip->pc && fip->pc <= fip->frame)
|
||
{
|
||
/* all regs were saved by push_call_dummy () */
|
||
adr = fip->frame - 4;
|
||
for (i = 0; i < NUM_REGS; i++)
|
||
{
|
||
fsrp->regs[i] = adr;
|
||
adr -= 4;
|
||
}
|
||
return;
|
||
}
|
||
|
||
locals = i386_get_frame_setup (get_pc_function_start (fip->pc));
|
||
|
||
if (locals >= 0)
|
||
{
|
||
adr = fip->frame - 4 - locals;
|
||
for (i = 0; i < 8; i++)
|
||
{
|
||
op = codestream_get ();
|
||
if (op < 0x50 || op > 0x57)
|
||
break;
|
||
fsrp->regs[I386_REGNO_TO_SYMMETRY(op - 0x50)] = adr;
|
||
adr -= 4;
|
||
}
|
||
}
|
||
|
||
fsrp->regs[PC_REGNUM] = fip->frame + 4;
|
||
fsrp->regs[FP_REGNUM] = fip->frame;
|
||
}
|
||
|
||
/* from i386-dep.c */
|
||
static
|
||
print_387_control_word (control)
|
||
unsigned short control;
|
||
{
|
||
printf ("control 0x%04x: ", control);
|
||
printf ("compute to ");
|
||
switch ((control >> 8) & 3)
|
||
{
|
||
case 0: printf ("24 bits; "); break;
|
||
case 1: printf ("(bad); "); break;
|
||
case 2: printf ("53 bits; "); break;
|
||
case 3: printf ("64 bits; "); break;
|
||
}
|
||
printf ("round ");
|
||
switch ((control >> 10) & 3)
|
||
{
|
||
case 0: printf ("NEAREST; "); break;
|
||
case 1: printf ("DOWN; "); break;
|
||
case 2: printf ("UP; "); break;
|
||
case 3: printf ("CHOP; "); break;
|
||
}
|
||
if (control & 0x3f)
|
||
{
|
||
printf ("mask:");
|
||
if (control & 0x0001) printf (" INVALID");
|
||
if (control & 0x0002) printf (" DENORM");
|
||
if (control & 0x0004) printf (" DIVZ");
|
||
if (control & 0x0008) printf (" OVERF");
|
||
if (control & 0x0010) printf (" UNDERF");
|
||
if (control & 0x0020) printf (" LOS");
|
||
printf (";");
|
||
}
|
||
printf ("\n");
|
||
if (control & 0xe080) printf ("warning: reserved bits on 0x%x\n",
|
||
control & 0xe080);
|
||
}
|
||
|
||
static
|
||
print_387_status_word (status)
|
||
unsigned short status;
|
||
{
|
||
printf ("status %#04x: ", status);
|
||
if (status & 0xff) {
|
||
printf ("exceptions:"); /* exception names match <machine/fpu.h> */
|
||
if (status & 0x0001) printf (" FLTINV");
|
||
if (status & 0x0002) printf (" FLTDEN");
|
||
if (status & 0x0004) printf (" FLTDIV");
|
||
if (status & 0x0008) printf (" FLTOVF");
|
||
if (status & 0x0010) printf (" FLTUND");
|
||
if (status & 0x0020) printf (" FLTPRE");
|
||
if (status & 0x0040) printf (" FLTSTK");
|
||
printf ("; ");
|
||
}
|
||
printf ("flags: %d%d%d%d; ",
|
||
(status & 0x4000) != 0,
|
||
(status & 0x0400) != 0,
|
||
(status & 0x0200) != 0,
|
||
(status & 0x0100) != 0);
|
||
|
||
printf ("top %d\n", (status >> 11) & 7);
|
||
}
|
||
|
||
static
|
||
print_fpu_status(ep)
|
||
struct pt_regset ep;
|
||
|
||
{
|
||
int i;
|
||
int bothstatus;
|
||
int top;
|
||
int fpreg;
|
||
unsigned char *p;
|
||
|
||
printf("80387:");
|
||
if (ep.pr_fpu.fpu_ip == 0) {
|
||
printf(" not in use.\n");
|
||
return;
|
||
} else {
|
||
printf("\n");
|
||
}
|
||
if (ep.pr_fpu.fpu_status != 0) {
|
||
print_387_status_word (ep.pr_fpu.fpu_status);
|
||
}
|
||
print_387_control_word (ep.pr_fpu.fpu_control);
|
||
printf ("last exception: ");
|
||
printf ("opcode 0x%x; ", ep.pr_fpu.fpu_rsvd4);
|
||
printf ("pc 0x%x:0x%x; ", ep.pr_fpu.fpu_cs, ep.pr_fpu.fpu_ip);
|
||
printf ("operand 0x%x:0x%x\n", ep.pr_fpu.fpu_data_offset, ep.pr_fpu.fpu_op_sel);
|
||
|
||
top = (ep.pr_fpu.fpu_status >> 11) & 7;
|
||
|
||
printf ("regno tag msb lsb value\n");
|
||
for (fpreg = 7; fpreg >= 0; fpreg--)
|
||
{
|
||
double val;
|
||
|
||
printf ("%s %d: ", fpreg == top ? "=>" : " ", fpreg);
|
||
|
||
switch ((ep.pr_fpu.fpu_tag >> (fpreg * 2)) & 3)
|
||
{
|
||
case 0: printf ("valid "); break;
|
||
case 1: printf ("zero "); break;
|
||
case 2: printf ("trap "); break;
|
||
case 3: printf ("empty "); break;
|
||
}
|
||
for (i = 9; i >= 0; i--)
|
||
printf ("%02x", ep.pr_fpu.fpu_stack[fpreg][i]);
|
||
|
||
i387_to_double (ep.pr_fpu.fpu_stack[fpreg], (char *)&val);
|
||
printf (" %g\n", val);
|
||
}
|
||
if (ep.pr_fpu.fpu_rsvd1)
|
||
printf ("warning: rsvd1 is 0x%x\n", ep.pr_fpu.fpu_rsvd1);
|
||
if (ep.pr_fpu.fpu_rsvd2)
|
||
printf ("warning: rsvd2 is 0x%x\n", ep.pr_fpu.fpu_rsvd2);
|
||
if (ep.pr_fpu.fpu_rsvd3)
|
||
printf ("warning: rsvd3 is 0x%x\n", ep.pr_fpu.fpu_rsvd3);
|
||
if (ep.pr_fpu.fpu_rsvd5)
|
||
printf ("warning: rsvd5 is 0x%x\n", ep.pr_fpu.fpu_rsvd5);
|
||
}
|
||
|
||
|
||
print_1167_control_word(pcr)
|
||
unsigned int pcr;
|
||
|
||
{
|
||
int pcr_tmp;
|
||
|
||
pcr_tmp = pcr & FPA_PCR_MODE;
|
||
printf("\tMODE= %#x; RND= %#x ", pcr_tmp, pcr_tmp & 12);
|
||
switch (pcr_tmp & 12) {
|
||
case 0:
|
||
printf("RN (Nearest Value)");
|
||
break;
|
||
case 1:
|
||
printf("RZ (Zero)");
|
||
break;
|
||
case 2:
|
||
printf("RP (Positive Infinity)");
|
||
break;
|
||
case 3:
|
||
printf("RM (Negative Infinity)");
|
||
break;
|
||
}
|
||
printf("; IRND= %d ", pcr_tmp & 2);
|
||
if (0 == pcr_tmp & 2) {
|
||
printf("(same as RND)\n");
|
||
} else {
|
||
printf("(toward zero)\n");
|
||
}
|
||
pcr_tmp = pcr & FPA_PCR_EM;
|
||
printf("\tEM= %#x", pcr_tmp);
|
||
if (pcr_tmp & FPA_PCR_EM_DM) printf(" DM");
|
||
if (pcr_tmp & FPA_PCR_EM_UOM) printf(" UOM");
|
||
if (pcr_tmp & FPA_PCR_EM_PM) printf(" PM");
|
||
if (pcr_tmp & FPA_PCR_EM_UM) printf(" UM");
|
||
if (pcr_tmp & FPA_PCR_EM_OM) printf(" OM");
|
||
if (pcr_tmp & FPA_PCR_EM_ZM) printf(" ZM");
|
||
if (pcr_tmp & FPA_PCR_EM_IM) printf(" IM");
|
||
printf("\n");
|
||
pcr_tmp = FPA_PCR_CC;
|
||
printf("\tCC= %#x", pcr_tmp);
|
||
if (pcr_tmp & FPA_PCR_20MHZ) printf(" 20MHZ");
|
||
if (pcr_tmp & FPA_PCR_CC_Z) printf(" Z");
|
||
if (pcr_tmp & FPA_PCR_CC_C2) printf(" C2");
|
||
if (pcr_tmp & FPA_PCR_CC_C1) printf(" C1");
|
||
switch (pcr_tmp) {
|
||
case FPA_PCR_CC_Z:
|
||
printf(" (Equal)");
|
||
break;
|
||
case FPA_PCR_CC_C1:
|
||
printf(" (Less than)");
|
||
break;
|
||
case 0:
|
||
printf(" (Greater than)");
|
||
break;
|
||
case FPA_PCR_CC_Z | FPA_PCR_CC_C1 | FPA_PCR_CC_C2:
|
||
printf(" (Unordered)");
|
||
break;
|
||
default:
|
||
printf(" (Undefined)");
|
||
break;
|
||
}
|
||
printf("\n");
|
||
pcr_tmp = pcr & FPA_PCR_AE;
|
||
printf("\tAE= %#x", pcr_tmp);
|
||
if (pcr_tmp & FPA_PCR_AE_DE) printf(" DE");
|
||
if (pcr_tmp & FPA_PCR_AE_UOE) printf(" UOE");
|
||
if (pcr_tmp & FPA_PCR_AE_PE) printf(" PE");
|
||
if (pcr_tmp & FPA_PCR_AE_UE) printf(" UE");
|
||
if (pcr_tmp & FPA_PCR_AE_OE) printf(" OE");
|
||
if (pcr_tmp & FPA_PCR_AE_ZE) printf(" ZE");
|
||
if (pcr_tmp & FPA_PCR_AE_EE) printf(" EE");
|
||
if (pcr_tmp & FPA_PCR_AE_IE) printf(" IE");
|
||
printf("\n");
|
||
}
|
||
|
||
print_1167_regs(regs)
|
||
long regs[FPA_NREGS];
|
||
|
||
{
|
||
int i;
|
||
|
||
union {
|
||
double d;
|
||
long l[2];
|
||
} xd;
|
||
union {
|
||
float f;
|
||
long l;
|
||
} xf;
|
||
|
||
|
||
for (i = 0; i < FPA_NREGS; i++) {
|
||
xf.l = regs[i];
|
||
printf("%%fp%d: raw= %#x, single= %f", i+1, regs[i], xf.f);
|
||
if (!(i & 1)) {
|
||
printf("\n");
|
||
} else {
|
||
xd.l[1] = regs[i];
|
||
xd.l[0] = regs[i+1];
|
||
printf(", double= %f\n", xd.d);
|
||
}
|
||
}
|
||
}
|
||
|
||
print_fpa_status(ep)
|
||
struct pt_regset ep;
|
||
|
||
{
|
||
|
||
printf("WTL 1167:");
|
||
if (ep.pr_fpa.fpa_pcr !=0) {
|
||
printf("\n");
|
||
print_1167_control_word(ep.pr_fpa.fpa_pcr);
|
||
print_1167_regs(ep.pr_fpa.fpa_regs);
|
||
} else {
|
||
printf(" not in use.\n");
|
||
}
|
||
}
|
||
|
||
i386_float_info ()
|
||
|
||
{
|
||
char ubuf[UPAGES*NBPG];
|
||
struct pt_regset regset;
|
||
extern int corechan;
|
||
|
||
if (have_inferior_p()) {
|
||
call_ptrace(XPT_RREGS, inferior_pid, ®set, 0);
|
||
} else {
|
||
if (lseek (corechan, 0, 0) < 0) {
|
||
perror ("seek on core file");
|
||
}
|
||
if (myread (corechan, ubuf, UPAGES*NBPG) < 0) {
|
||
perror ("read on core file");
|
||
}
|
||
/* only interested in the floating point registers */
|
||
regset.pr_fpu = ((struct user *) ubuf)->u_fpusave;
|
||
regset.pr_fpa = ((struct user *) ubuf)->u_fpasave;
|
||
}
|
||
print_fpu_status(regset);
|
||
print_fpa_status(regset);
|
||
}
|
||
|
||
i387_to_double (from, to)
|
||
char *from;
|
||
char *to;
|
||
{
|
||
long *lp;
|
||
/* push extended mode on 387 stack, then pop in double mode
|
||
*
|
||
* first, set exception masks so no error is generated -
|
||
* number will be rounded to inf or 0, if necessary
|
||
*/
|
||
asm ("pushl %eax"); /* grab a stack slot */
|
||
asm ("fstcw (%esp)"); /* get 387 control word */
|
||
asm ("movl (%esp),%eax"); /* save old value */
|
||
asm ("orl $0x3f,%eax"); /* mask all exceptions */
|
||
asm ("pushl %eax");
|
||
asm ("fldcw (%esp)"); /* load new value into 387 */
|
||
|
||
asm ("movl 8(%ebp),%eax");
|
||
asm ("fldt (%eax)"); /* push extended number on 387 stack */
|
||
asm ("fwait");
|
||
asm ("movl 12(%ebp),%eax");
|
||
asm ("fstpl (%eax)"); /* pop double */
|
||
asm ("fwait");
|
||
|
||
asm ("popl %eax"); /* flush modified control word */
|
||
asm ("fnclex"); /* clear exceptions */
|
||
asm ("fldcw (%esp)"); /* restore original control word */
|
||
asm ("popl %eax"); /* flush saved copy */
|
||
}
|
||
|
||
double_to_i387 (from, to)
|
||
char *from;
|
||
char *to;
|
||
{
|
||
/* push double mode on 387 stack, then pop in extended mode
|
||
* no errors are possible because every 64-bit pattern
|
||
* can be converted to an extended
|
||
*/
|
||
asm ("movl 8(%ebp),%eax");
|
||
asm ("fldl (%eax)");
|
||
asm ("fwait");
|
||
asm ("movl 12(%ebp),%eax");
|
||
asm ("fstpt (%eax)");
|
||
asm ("fwait");
|
||
}
|
||
|
||
static long
|
||
i386_get_frame_setup (pc)
|
||
{
|
||
unsigned char op;
|
||
|
||
codestream_seek (pc);
|
||
|
||
i386_follow_jump ();
|
||
|
||
op = codestream_get ();
|
||
|
||
if (op == 0x58) /* popl %eax */
|
||
{
|
||
/*
|
||
* this function must start with
|
||
*
|
||
* popl %eax 0x58
|
||
* xchgl %eax, (%esp) 0x87 0x04 0x24
|
||
* or xchgl %eax, 0(%esp) 0x87 0x44 0x24 0x00
|
||
*
|
||
* (the system 5 compiler puts out the second xchg
|
||
* inst, and the assembler doesn't try to optimize it,
|
||
* so the 'sib' form gets generated)
|
||
*
|
||
* this sequence is used to get the address of the return
|
||
* buffer for a function that returns a structure
|
||
*/
|
||
int pos;
|
||
unsigned char buf[4];
|
||
static unsigned char proto1[3] = { 0x87,0x04,0x24 };
|
||
static unsigned char proto2[4] = { 0x87,0x44,0x24,0x00 };
|
||
pos = codestream_tell ();
|
||
codestream_read (buf, 4);
|
||
if (bcmp (buf, proto1, 3) == 0)
|
||
pos += 3;
|
||
else if (bcmp (buf, proto2, 4) == 0)
|
||
pos += 4;
|
||
|
||
codestream_seek (pos);
|
||
op = codestream_get (); /* update next opcode */
|
||
}
|
||
|
||
if (op == 0x55) /* pushl %esp */
|
||
{
|
||
if (codestream_get () != 0x8b) /* movl %esp, %ebp (2bytes) */
|
||
return (-1);
|
||
if (codestream_get () != 0xec)
|
||
return (-1);
|
||
/*
|
||
* check for stack adjustment
|
||
*
|
||
* subl $XXX, %esp
|
||
*
|
||
* note: you can't subtract a 16 bit immediate
|
||
* from a 32 bit reg, so we don't have to worry
|
||
* about a data16 prefix
|
||
*/
|
||
op = codestream_peek ();
|
||
if (op == 0x83) /* subl with 8 bit immed */
|
||
{
|
||
codestream_get ();
|
||
if (codestream_get () != 0xec)
|
||
return (-1);
|
||
/* subl with signed byte immediate
|
||
* (though it wouldn't make sense to be negative)
|
||
*/
|
||
return (codestream_get());
|
||
}
|
||
else if (op == 0x81) /* subl with 32 bit immed */
|
||
{
|
||
int locals;
|
||
if (codestream_get () != 0xec)
|
||
return (-1);
|
||
/* subl with 32 bit immediate */
|
||
codestream_read ((unsigned char *)&locals, 4);
|
||
return (locals);
|
||
}
|
||
else
|
||
{
|
||
return (0);
|
||
}
|
||
}
|
||
else if (op == 0xc8)
|
||
{
|
||
/* enter instruction: arg is 16 unsigned immed */
|
||
unsigned short slocals;
|
||
codestream_read ((unsigned char *)&slocals, 2);
|
||
codestream_get (); /* flush final byte of enter instruction */
|
||
return (slocals);
|
||
}
|
||
return (-1);
|
||
}
|
||
|
||
/* next instruction is a jump, move to target */
|
||
static
|
||
i386_follow_jump ()
|
||
{
|
||
int long_delta;
|
||
short short_delta;
|
||
char byte_delta;
|
||
int data16;
|
||
int pos;
|
||
|
||
pos = codestream_tell ();
|
||
|
||
data16 = 0;
|
||
if (codestream_peek () == 0x66)
|
||
{
|
||
codestream_get ();
|
||
data16 = 1;
|
||
}
|
||
|
||
switch (codestream_get ())
|
||
{
|
||
case 0xe9:
|
||
/* relative jump: if data16 == 0, disp32, else disp16 */
|
||
if (data16)
|
||
{
|
||
codestream_read ((unsigned char *)&short_delta, 2);
|
||
pos += short_delta + 3; /* include size of jmp inst */
|
||
}
|
||
else
|
||
{
|
||
codestream_read ((unsigned char *)&long_delta, 4);
|
||
pos += long_delta + 5;
|
||
}
|
||
break;
|
||
case 0xeb:
|
||
/* relative jump, disp8 (ignore data16) */
|
||
codestream_read ((unsigned char *)&byte_delta, 1);
|
||
pos += byte_delta + 2;
|
||
break;
|
||
}
|
||
codestream_seek (pos + data16);
|
||
}
|
||
|
||
/* return pc of first real instruction */
|
||
/* from i386-dep.c */
|
||
|
||
i386_skip_prologue (pc)
|
||
{
|
||
unsigned char op;
|
||
int i;
|
||
|
||
if (i386_get_frame_setup (pc) < 0)
|
||
return (pc);
|
||
|
||
/* found valid frame setup - codestream now points to
|
||
* start of push instructions for saving registers
|
||
*/
|
||
|
||
/* skip over register saves */
|
||
for (i = 0; i < 8; i++)
|
||
{
|
||
op = codestream_peek ();
|
||
/* break if not pushl inst */
|
||
if (op < 0x50 || op > 0x57)
|
||
break;
|
||
codestream_get ();
|
||
}
|
||
|
||
i386_follow_jump ();
|
||
|
||
return (codestream_tell ());
|
||
}
|
||
|
||
symmetry_extract_return_value(type, regbuf, valbuf)
|
||
struct type *type;
|
||
char *regbuf;
|
||
char *valbuf;
|
||
{
|
||
union {
|
||
double d;
|
||
int l[2];
|
||
} xd;
|
||
int i;
|
||
float f;
|
||
|
||
if (TYPE_CODE_FLT == TYPE_CODE(type)) {
|
||
for (i = 0; i < misc_function_count; i++) {
|
||
if (!strcmp(misc_function_vector[i].name, "1167_flt"))
|
||
break;
|
||
}
|
||
if (i < misc_function_count) {
|
||
/* found "1167_flt" means 1167, %fp2-%fp3 */
|
||
/* float & double; 19= %fp2, 20= %fp3 */
|
||
/* no single precision on 1167 */
|
||
xd.l[1] = *((int *)®buf[REGISTER_BYTE(19)]);
|
||
xd.l[0] = *((int *)®buf[REGISTER_BYTE(20)]);
|
||
switch (TYPE_LENGTH(type)) {
|
||
case 4:
|
||
f = (float) xd.d;
|
||
bcopy(&f, valbuf, TYPE_LENGTH(type));
|
||
break;
|
||
case 8:
|
||
bcopy(&xd.d, valbuf, TYPE_LENGTH(type));
|
||
break;
|
||
default:
|
||
error("Unknown floating point size");
|
||
break;
|
||
}
|
||
} else {
|
||
/* 387 %st(0), gcc uses this */
|
||
i387_to_double(((int *)®buf[REGISTER_BYTE(3)]),
|
||
&xd.d);
|
||
switch (TYPE_LENGTH(type)) {
|
||
case 4: /* float */
|
||
f = (float) xd.d;
|
||
bcopy(&f, valbuf, 4);
|
||
break;
|
||
case 8: /* double */
|
||
bcopy(&xd.d, valbuf, 8);
|
||
break;
|
||
default:
|
||
error("Unknown floating point size");
|
||
break;
|
||
}
|
||
}
|
||
} else {
|
||
bcopy (regbuf, valbuf, TYPE_LENGTH (type));
|
||
}
|
||
}
|