281 lines
6.9 KiB
C
281 lines
6.9 KiB
C
/* Functions specific to running gdb native on an i386 running NetBSD
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Copyright 1989, 1992, 1993, 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, Boston, MA 02111-1307, USA. */
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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 <machine/pcb.h>
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#include "defs.h"
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#include "inferior.h"
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#include "target.h"
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#include "gdbcore.h"
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void
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fetch_inferior_registers (regno)
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int regno;
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{
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struct reg inferior_registers;
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ptrace (PT_GETREGS, inferior_pid,
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(PTRACE_ARG3_TYPE) &inferior_registers, 0);
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memcpy (®isters[REGISTER_BYTE (0)], &inferior_registers,
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sizeof(inferior_registers));
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/* FIXME: FP regs? */
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registers_fetched ();
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}
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void
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store_inferior_registers (regno)
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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)],
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sizeof(inferior_registers));
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ptrace (PT_SETREGS, inferior_pid,
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(PTRACE_ARG3_TYPE) &inferior_registers, 0);
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/* FIXME: FP regs? */
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registers_fetched ();
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}
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/* XXX - Add this to machine/regs.h instead? */
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struct md_core {
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struct reg intreg;
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struct fpreg freg;
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};
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static struct fpreg i386_fp_registers;
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static int i386_fp_read = 0;
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static void
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fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
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char *core_reg_sect;
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unsigned core_reg_size;
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int which;
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unsigned int reg_addr; /* Unused in this version */
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{
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struct md_core *core_reg;
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core_reg = (struct md_core *)core_reg_sect;
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/* We get everything from the .reg section. */
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if (which != 0)
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return;
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if (core_reg_size < sizeof(struct reg)) {
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fprintf_unfiltered (gdb_stderr, "Couldn't read regs from core file\n");
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return;
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}
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/* Integer registers */
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memcpy(®isters[REGISTER_BYTE (0)],
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&core_reg->intreg, sizeof(struct reg));
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/* Floating point registers */
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i386_fp_registers = core_reg->freg;
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i386_fp_read = 1;
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registers_fetched ();
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}
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/* Register that we are able to handle i386nbsd core file formats.
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FIXME: is this really bfd_target_unknown_flavour? */
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static struct core_fns nat_core_fns =
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{
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bfd_target_unknown_flavour,
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fetch_core_registers,
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NULL
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};
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void
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_initialize_i386nbsd_nat ()
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{
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add_core_fns (&nat_core_fns);
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}
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/*
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* kernel_u_size() is not helpful on NetBSD because
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* the "u" struct is NOT in the core dump file.
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*/
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#ifdef FETCH_KCORE_REGISTERS
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/*
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* Get registers from a kernel crash dump or live kernel.
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* Called by kcore-nbsd.c:get_kcore_registers().
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*/
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void
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fetch_kcore_registers (pcb)
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struct pcb *pcb;
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{
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int i, regno, regs[4];
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/*
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* get the register values out of the sys pcb and
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* store them where `read_register' will find them.
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*/
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if (target_read_memory(pcb->pcb_tss.tss_esp+4,
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(char *)regs, sizeof(regs)))
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error("Cannot read ebx, esi, and edi.");
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for (i = 0, regno = 0; regno < 3; regno++)
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supply_register(regno, (char *)&i);
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supply_register(3, (char *)®s[2]);
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supply_register(4, (char *)&pcb->pcb_tss.tss_esp);
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supply_register(5, (char *)&pcb->pcb_tss.tss_ebp);
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supply_register(6, (char *)®s[1]);
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supply_register(7, (char *)®s[0]);
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supply_register(8, (char *)®s[3]);
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for (i = 0, regno = 9; regno < 10; regno++)
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supply_register(regno, (char *)&i);
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#if 0
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i = 0x08;
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supply_register(10, (char *)&i);
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i = 0x10;
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supply_register(11, (char *)&i);
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#endif
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/* The kernel does not use the FPU, so ignore it. */
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registers_fetched ();
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}
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#endif /* FETCH_KCORE_REGISTERS */
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#ifdef FLOAT_INFO
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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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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 (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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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: printf_unfiltered ("valid "); break;
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case 1: printf_unfiltered ("zero "); break;
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case 2: printf_unfiltered ("trap "); break;
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case 3: printf_unfiltered ("empty "); 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 ()
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{
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extern int inferior_pid;
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if (inferior_pid)
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{
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ptrace (PT_GETFPREGS, inferior_pid, (PTRACE_ARG3_TYPE) &i386_fp_registers,
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0);
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}
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else if (!i386_fp_read)
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{
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error ("The program has no floating point registers now.");
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}
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print_387_status (0, (struct env387 *) &i386_fp_registers);
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}
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#endif
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