d747e0af3d
* All GDB files that #include defs.h: Removed stdio.h. (defs.h): #include stdio.h. This has been tested by building GDBs for all targets hosted on Sun4. None of the build problems were related to stdio.h inclusion. (n.b. many configurations don't build for other reasons.)
250 lines
6.1 KiB
C
250 lines
6.1 KiB
C
/* Intel 386 stuff.
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Copyright (C) 1988, 1989, 1991 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "defs.h"
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#include "frame.h"
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#include "inferior.h"
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#include "language.h"
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#include "gdbcore.h"
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#ifdef USG
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#include <sys/types.h>
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#endif
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#include <sys/param.h>
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#include <sys/dir.h>
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#include <signal.h>
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#include <sys/user.h>
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/reg.h>
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#include "ieee-float.h"
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#include "target.h"
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extern struct ext_format ext_format_i387;
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/* this table must line up with REGISTER_NAMES in m-i386.h */
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/* symbols like 'EAX' come from <sys/reg.h> */
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static int regmap[] =
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{
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EAX, ECX, EDX, EBX,
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UESP, EBP, ESI, EDI,
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EIP, EFL, CS, SS,
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DS, ES, FS, GS,
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};
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/* blockend is the value of u.u_ar0, and points to the
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* place where GS is stored
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*/
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int
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i386_register_u_addr (blockend, regnum)
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int blockend;
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int regnum;
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{
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#if 0
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/* this will be needed if fp registers are reinstated */
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/* for now, you can look at them with 'info float'
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* sys5 wont let you change them with ptrace anyway
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*/
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if (regnum >= FP0_REGNUM && regnum <= FP7_REGNUM)
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{
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int ubase, fpstate;
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struct user u;
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ubase = blockend + 4 * (SS + 1) - KSTKSZ;
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fpstate = ubase + ((char *)&u.u_fpstate - (char *)&u);
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return (fpstate + 0x1c + 10 * (regnum - FP0_REGNUM));
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}
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else
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#endif
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return (blockend + 4 * regmap[regnum]);
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}
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#if 0
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/* mauro@olympus 1991.10.20 -- compiling the following code causes
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undefined symbols at link time, specifically: corechan, have_inferior_p */
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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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static
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print_387_status (status, ep)
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unsigned short status;
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struct env387 *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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bothstatus = ((status != 0) && (ep->status != 0));
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if (status != 0)
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{
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if (bothstatus)
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printf ("u: ");
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print_387_status_word (status);
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}
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if (ep->status != 0)
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{
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if (bothstatus)
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printf ("e: ");
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print_387_status_word (ep->status);
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}
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print_387_control_word (ep->control);
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printf ("last exception: ");
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printf ("opcode %s; ", local_hex_string(ep->opcode));
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printf ("pc %s:", local_hex_string(ep->code_seg));
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printf ("%s; ", local_hex_string(ep->eip));
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printf ("operand %s", local_hex_string(ep->operand_seg));
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printf (":%s\n", local_hex_string(ep->operand));
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top = (ep->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->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->regs[fpreg][i]);
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ieee_extended_to_double (&ext_format_i387, (char *)ep->regs[fpreg],
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&val);
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printf (" %g\n", val);
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}
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if (ep->r0)
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printf ("warning: reserved0 is %s\n", local_hex_string(ep->r0));
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if (ep->r1)
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printf ("warning: reserved1 is %s\n", local_hex_string(ep->r1));
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if (ep->r2)
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printf ("warning: reserved2 is %s\n", local_hex_string(ep->r2));
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if (ep->r3)
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printf ("warning: reserved3 is %s\n", local_hex_string(ep->r3));
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}
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#ifndef U_FPSTATE
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#define U_FPSTATE(u) u.u_fpstate
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#endif
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i386_float_info ()
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{
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struct user u; /* just for address computations */
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int i;
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/* fpstate defined in <sys/user.h> */
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struct fpstate *fpstatep;
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char buf[sizeof (struct fpstate) + 2 * sizeof (int)];
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unsigned int uaddr;
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char fpvalid = 0;
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unsigned int rounded_addr;
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unsigned int rounded_size;
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extern int corechan;
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int skip;
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uaddr = (char *)&u.u_fpvalid - (char *)&u;
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if (target_has_execution)
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{
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unsigned int data;
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unsigned int mask;
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rounded_addr = uaddr & -sizeof (int);
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data = ptrace (3, inferior_pid, rounded_addr, 0);
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mask = 0xff << ((uaddr - rounded_addr) * 8);
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fpvalid = ((data & mask) != 0);
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}
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#if 0
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else
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{
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if (lseek (corechan, uaddr, 0) < 0)
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perror ("seek on core file");
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if (myread (corechan, &fpvalid, 1) < 0)
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perror ("read on core file");
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}
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#endif /* no core support yet */
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if (fpvalid == 0)
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{
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printf ("no floating point status saved\n");
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return;
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}
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uaddr = (char *)&U_FPSTATE(u) - (char *)&u;
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if (target_has_execution)
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{
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int *ip;
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rounded_addr = uaddr & -sizeof (int);
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rounded_size = (((uaddr + sizeof (struct fpstate)) - uaddr) +
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sizeof (int) - 1) / sizeof (int);
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skip = uaddr - rounded_addr;
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ip = (int *)buf;
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for (i = 0; i < rounded_size; i++)
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{
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*ip++ = ptrace (3, inferior_pid, rounded_addr, 0);
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rounded_addr += sizeof (int);
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}
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}
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#if 0
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else
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{
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if (lseek (corechan, uaddr, 0) < 0)
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perror_with_name ("seek on core file");
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if (myread (corechan, buf, sizeof (struct fpstate)) < 0)
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perror_with_name ("read from core file");
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skip = 0;
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}
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#endif /* 0 */
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fpstatep = (struct fpstate *)(buf + skip);
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print_387_status (fpstatep->status, (struct env387 *)fpstatep->state);
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}
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#endif /* mauro@olympus 1991.10.20 */
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