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288 lines
7.0 KiB
C
288 lines
7.0 KiB
C
/* Native-dependent code for BSD Unix running on i386's, for GDB.
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Copyright 1988, 1989, 1991, 1992, 1994, 1996 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#ifdef FETCH_INFERIOR_REGISTERS
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#include <sys/types.h>
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#include <sys/ptrace.h>
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#include <machine/reg.h>
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#include <machine/frame.h>
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#include "inferior.h"
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#include "gdbcore.h" /* for registers_fetched() */
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void
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fetch_inferior_registers (int regno)
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{
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struct reg inferior_registers;
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ptrace (PT_GETREGS, inferior_pid, (PTRACE_ARG3_TYPE) & inferior_registers, 0);
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memcpy (®isters[REGISTER_BYTE (0)], &inferior_registers, 4 * NUM_REGS);
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registers_fetched ();
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}
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void
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store_inferior_registers (int regno)
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{
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struct reg inferior_registers;
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memcpy (&inferior_registers, ®isters[REGISTER_BYTE (0)], 4 * NUM_REGS);
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ptrace (PT_SETREGS, inferior_pid, (PTRACE_ARG3_TYPE) & inferior_registers, 0);
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}
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struct md_core
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{
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struct reg intreg;
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struct fpreg freg;
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};
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void
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fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
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CORE_ADDR ignore)
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{
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struct md_core *core_reg = (struct md_core *) core_reg_sect;
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/* integer registers */
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memcpy (®isters[REGISTER_BYTE (0)], &core_reg->intreg,
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sizeof (struct reg));
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/* floating point registers */
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/* XXX */
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}
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#else
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#include <machine/reg.h>
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/* this table must line up with REGISTER_NAMES in tm-i386.h */
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/* symbols like 'tEAX' come from <machine/reg.h> */
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static int tregmap[] =
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{
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tEAX, tECX, tEDX, tEBX,
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tESP, tEBP, tESI, tEDI,
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tEIP, tEFLAGS, tCS, tSS
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};
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#ifdef sEAX
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static int sregmap[] =
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{
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sEAX, sECX, sEDX, sEBX,
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sESP, sEBP, sESI, sEDI,
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sEIP, sEFLAGS, sCS, sSS
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};
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#else /* No sEAX */
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/* FreeBSD has decided to collapse the s* and t* symbols. So if the s*
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ones aren't around, use the t* ones for sregmap too. */
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static int sregmap[] =
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{
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tEAX, tECX, tEDX, tEBX,
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tESP, tEBP, tESI, tEDI,
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tEIP, tEFLAGS, tCS, tSS
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};
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#endif /* No sEAX */
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/* blockend is the value of u.u_ar0, and points to the
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place where ES is stored. */
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int
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i386_register_u_addr (int blockend, int regnum)
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{
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/* The following condition is a kludge to get at the proper register map
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depending upon the state of pcb_flag.
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The proper condition would be
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if (u.u_pcb.pcb_flag & FM_TRAP)
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but that would require a ptrace call here and wouldn't work
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for corefiles. */
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if (blockend < 0x1fcc)
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return (blockend + 4 * tregmap[regnum]);
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else
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return (blockend + 4 * sregmap[regnum]);
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}
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#endif /* !FETCH_INFERIOR_REGISTERS */
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#ifdef FLOAT_INFO
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#include "expression.h"
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#include "language.h" /* for local_hex_string */
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#include "floatformat.h"
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#include <sys/param.h>
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#include <sys/dir.h>
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#include <signal.h>
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#include <a.out.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <sys/uio.h>
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#define curpcb Xcurpcb /* XXX avoid leaking declaration from pcb.h */
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#include <sys/user.h>
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#undef curpcb
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#include <sys/file.h>
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#include "gdb_stat.h"
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#include <sys/ptrace.h>
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extern void print_387_control_word (); /* i387-tdep.h */
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extern void print_387_status_word ();
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#define fpstate save87
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#define U_FPSTATE(u) u.u_pcb.pcb_savefpu
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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 void
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print_387_status (unsigned short status, 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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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_unfiltered ("u: ");
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print_387_status_word ((unsigned int) 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_unfiltered ("e: ");
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print_387_status_word ((unsigned int) ep->status);
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}
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print_387_control_word ((unsigned int) ep->control);
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printf_unfiltered ("last exception: ");
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printf_unfiltered ("opcode %s; ", local_hex_string (ep->opcode));
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printf_unfiltered ("pc %s:", local_hex_string (ep->code_seg));
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printf_unfiltered ("%s; ", local_hex_string (ep->eip));
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printf_unfiltered ("operand %s", local_hex_string (ep->operand_seg));
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printf_unfiltered (":%s\n", local_hex_string (ep->operand));
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top = (ep->status >> 11) & 7;
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printf_unfiltered ("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_unfiltered ("%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:
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printf_unfiltered ("valid ");
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break;
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case 1:
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printf_unfiltered ("zero ");
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break;
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case 2:
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printf_unfiltered ("trap ");
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break;
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case 3:
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printf_unfiltered ("empty ");
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break;
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}
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for (i = 9; i >= 0; i--)
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printf_unfiltered ("%02x", ep->regs[fpreg][i]);
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floatformat_to_double (&floatformat_i387_ext, (char *) ep->regs[fpreg],
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&val);
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printf_unfiltered (" %g\n", val);
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}
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}
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i386_float_info (void)
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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;
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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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extern int inferior_pid;
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uaddr = (char *) &U_FPSTATE (u) - (char *) &u;
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if (inferior_pid)
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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 (PT_READ_U, inferior_pid, (caddr_t) rounded_addr, 0);
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rounded_addr += sizeof (int);
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}
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}
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else
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{
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printf ("float info: can't do a core file (yet)\n");
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return;
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#if 0
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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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#endif
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}
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print_387_status (0, (struct env387 *) buf);
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}
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int
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kernel_u_size (void)
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{
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return (sizeof (struct user));
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}
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#endif
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