558 lines
15 KiB
C
558 lines
15 KiB
C
/* Sequent Symmetry host interface, for GDB when running under Unix.
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Copyright (C) 1986, 1987, 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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/* 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 "gdbcore.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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#include <sgtty.h>
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#define TERMINAL struct sgttyb
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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 0
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/* PREPARE_TO_STORE deals with this. */
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if (-1 == regno)
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{
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#endif
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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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#if 0
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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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#endif /* 0 */
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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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registers_fetched ();
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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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/* 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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#include "gdbcore.h"
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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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int 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 (filename);
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data_start = exec_data_start;
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data_end = data_start + NBPG * (u.u_dsize - u.u_tsize);
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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 = ctob(UPAGES + u.u_dsize - u.u_tsize);
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reg_offset = (int) u.u_ar0 - KERNEL_U_ADDR;
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printf("u.u_tsize= %#x, u.u_dsize= %#x, u.u_ssize= %#x, stack_off= %#x\n",
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u.u_tsize, u.u_dsize, u.u_ssize, stack_offset);
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core_aouthdr.a_magic = 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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val = lseek (corechan, register_addr (regno, reg_offset), 0);
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if (val < 0)
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perror_with_name (filename);
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val = myread (corechan, buf, sizeof buf);
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if (val < 0)
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perror_with_name (filename);
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supply_register (regno, buf);
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}
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}
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}
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if (filename[0] == '/')
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corefile = savestring (filename, strlen (filename));
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else
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{
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corefile = concat (current_directory, "/", filename);
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}
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set_current_frame(create_new_frame(read_register(FP_REGNUM),
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read_pc()));
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/* set_current_frame (read_register (FP_REGNUM));*/
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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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/* from i386-dep.c */
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static
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print_387_control_word (control)
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unsigned short control;
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{
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printf ("control 0x%04x: ", control);
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printf ("compute to ");
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switch ((control >> 8) & 3)
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{
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case 0: printf ("24 bits; "); break;
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case 1: printf ("(bad); "); break;
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case 2: printf ("53 bits; "); break;
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case 3: printf ("64 bits; "); break;
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}
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printf ("round ");
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switch ((control >> 10) & 3)
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{
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case 0: printf ("NEAREST; "); break;
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case 1: printf ("DOWN; "); break;
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case 2: printf ("UP; "); break;
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case 3: printf ("CHOP; "); break;
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}
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if (control & 0x3f)
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{
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printf ("mask:");
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if (control & 0x0001) printf (" INVALID");
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if (control & 0x0002) printf (" DENORM");
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if (control & 0x0004) printf (" DIVZ");
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if (control & 0x0008) printf (" OVERF");
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if (control & 0x0010) printf (" UNDERF");
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if (control & 0x0020) printf (" LOS");
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printf (";");
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}
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printf ("\n");
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if (control & 0xe080) printf ("warning: reserved bits on 0x%x\n",
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control & 0xe080);
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}
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static
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print_387_status_word (status)
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unsigned short status;
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{
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printf ("status %#04x: ", status);
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if (status & 0xff) {
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printf ("exceptions:"); /* exception names match <machine/fpu.h> */
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if (status & 0x0001) printf (" FLTINV");
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if (status & 0x0002) printf (" FLTDEN");
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if (status & 0x0004) printf (" FLTDIV");
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if (status & 0x0008) printf (" FLTOVF");
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if (status & 0x0010) printf (" FLTUND");
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if (status & 0x0020) printf (" FLTPRE");
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if (status & 0x0040) printf (" FLTSTK");
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printf ("; ");
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}
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printf ("flags: %d%d%d%d; ",
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(status & 0x4000) != 0,
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(status & 0x0400) != 0,
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(status & 0x0200) != 0,
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(status & 0x0100) != 0);
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printf ("top %d\n", (status >> 11) & 7);
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}
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static
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print_fpu_status(ep)
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struct pt_regset ep;
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{
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int i;
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int bothstatus;
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int top;
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int fpreg;
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unsigned char *p;
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printf("80387:");
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if (ep.pr_fpu.fpu_ip == 0) {
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printf(" not in use.\n");
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return;
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} else {
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printf("\n");
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}
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if (ep.pr_fpu.fpu_status != 0) {
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print_387_status_word (ep.pr_fpu.fpu_status);
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}
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print_387_control_word (ep.pr_fpu.fpu_control);
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printf ("last exception: ");
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printf ("opcode 0x%x; ", ep.pr_fpu.fpu_rsvd4);
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printf ("pc 0x%x:0x%x; ", ep.pr_fpu.fpu_cs, ep.pr_fpu.fpu_ip);
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printf ("operand 0x%x:0x%x\n", ep.pr_fpu.fpu_data_offset, ep.pr_fpu.fpu_op_sel);
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top = (ep.pr_fpu.fpu_status >> 11) & 7;
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printf ("regno tag msb lsb value\n");
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for (fpreg = 7; fpreg >= 0; fpreg--)
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{
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double val;
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printf ("%s %d: ", fpreg == top ? "=>" : " ", fpreg);
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switch ((ep.pr_fpu.fpu_tag >> (fpreg * 2)) & 3)
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{
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case 0: printf ("valid "); break;
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case 1: printf ("zero "); break;
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case 2: printf ("trap "); break;
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case 3: printf ("empty "); break;
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}
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for (i = 9; i >= 0; i--)
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printf ("%02x", ep.pr_fpu.fpu_stack[fpreg][i]);
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i387_to_double (ep.pr_fpu.fpu_stack[fpreg], (char *)&val);
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printf (" %g\n", val);
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}
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if (ep.pr_fpu.fpu_rsvd1)
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printf ("warning: rsvd1 is 0x%x\n", ep.pr_fpu.fpu_rsvd1);
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if (ep.pr_fpu.fpu_rsvd2)
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printf ("warning: rsvd2 is 0x%x\n", ep.pr_fpu.fpu_rsvd2);
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if (ep.pr_fpu.fpu_rsvd3)
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printf ("warning: rsvd3 is 0x%x\n", ep.pr_fpu.fpu_rsvd3);
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if (ep.pr_fpu.fpu_rsvd5)
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printf ("warning: rsvd5 is 0x%x\n", ep.pr_fpu.fpu_rsvd5);
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}
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print_1167_control_word(pcr)
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unsigned int pcr;
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{
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int pcr_tmp;
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pcr_tmp = pcr & FPA_PCR_MODE;
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printf("\tMODE= %#x; RND= %#x ", pcr_tmp, pcr_tmp & 12);
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switch (pcr_tmp & 12) {
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case 0:
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printf("RN (Nearest Value)");
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break;
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case 1:
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printf("RZ (Zero)");
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break;
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case 2:
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printf("RP (Positive Infinity)");
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break;
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case 3:
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printf("RM (Negative Infinity)");
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break;
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}
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printf("; IRND= %d ", pcr_tmp & 2);
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if (0 == pcr_tmp & 2) {
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printf("(same as RND)\n");
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} else {
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printf("(toward zero)\n");
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}
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pcr_tmp = pcr & FPA_PCR_EM;
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printf("\tEM= %#x", pcr_tmp);
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if (pcr_tmp & FPA_PCR_EM_DM) printf(" DM");
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if (pcr_tmp & FPA_PCR_EM_UOM) printf(" UOM");
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if (pcr_tmp & FPA_PCR_EM_PM) printf(" PM");
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if (pcr_tmp & FPA_PCR_EM_UM) printf(" UM");
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if (pcr_tmp & FPA_PCR_EM_OM) printf(" OM");
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if (pcr_tmp & FPA_PCR_EM_ZM) printf(" ZM");
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if (pcr_tmp & FPA_PCR_EM_IM) printf(" IM");
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printf("\n");
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pcr_tmp = FPA_PCR_CC;
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printf("\tCC= %#x", pcr_tmp);
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if (pcr_tmp & FPA_PCR_20MHZ) printf(" 20MHZ");
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if (pcr_tmp & FPA_PCR_CC_Z) printf(" Z");
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if (pcr_tmp & FPA_PCR_CC_C2) printf(" C2");
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if (pcr_tmp & FPA_PCR_CC_C1) printf(" C1");
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switch (pcr_tmp) {
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case FPA_PCR_CC_Z:
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printf(" (Equal)");
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break;
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case FPA_PCR_CC_C1:
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printf(" (Less than)");
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break;
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case 0:
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printf(" (Greater than)");
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break;
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case FPA_PCR_CC_Z | FPA_PCR_CC_C1 | FPA_PCR_CC_C2:
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printf(" (Unordered)");
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break;
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default:
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printf(" (Undefined)");
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break;
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}
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printf("\n");
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pcr_tmp = pcr & FPA_PCR_AE;
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printf("\tAE= %#x", pcr_tmp);
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if (pcr_tmp & FPA_PCR_AE_DE) printf(" DE");
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if (pcr_tmp & FPA_PCR_AE_UOE) printf(" UOE");
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if (pcr_tmp & FPA_PCR_AE_PE) printf(" PE");
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if (pcr_tmp & FPA_PCR_AE_UE) printf(" UE");
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if (pcr_tmp & FPA_PCR_AE_OE) printf(" OE");
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if (pcr_tmp & FPA_PCR_AE_ZE) printf(" ZE");
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if (pcr_tmp & FPA_PCR_AE_EE) printf(" EE");
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if (pcr_tmp & FPA_PCR_AE_IE) printf(" IE");
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printf("\n");
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}
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print_1167_regs(regs)
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long regs[FPA_NREGS];
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{
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int i;
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union {
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double d;
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long l[2];
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} xd;
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union {
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float f;
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long l;
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} xf;
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for (i = 0; i < FPA_NREGS; i++) {
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xf.l = regs[i];
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printf("%%fp%d: raw= %#x, single= %f", i+1, regs[i], xf.f);
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if (!(i & 1)) {
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printf("\n");
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} else {
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xd.l[1] = regs[i];
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xd.l[0] = regs[i+1];
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printf(", double= %f\n", xd.d);
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}
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}
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}
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print_fpa_status(ep)
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struct pt_regset ep;
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{
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printf("WTL 1167:");
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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");
|
||
}
|