199b2450f6
Change all references to stdout/stderr to gdb_stdout/gdb_stderr. Replace all calls to stdio output functions with calls to corresponding _unfiltered functions (`fprintf_unfiltered') Replaced calls to fopen for output to gdb_fopen. Added sufficient goo to utils.c and defs.h to make the above work. The net effect is that stdio output functions are only directly used in utils.c. Elsewhere, the _unfiltered and _filtered functions and GDB_FILE type are used. In the near future, GDB_FILE will stop being equivalant to FILE. The semantics of some commands has changed in a very subtle way: called in the right context, they may cause new occurences of prompt_for_continue() behavior. The testsuite doesn't notice anything like this, though. Please respect this change by not reintroducing stdio output dependencies in the main body of gdb code. All output from commands should go to a GDB_FILE. Target-specific code can still use stdio directly to communicate with targets.
338 lines
7.7 KiB
C
338 lines
7.7 KiB
C
/* Intel 386 native support.
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Copyright (C) 1988, 1989, 1991, 1992 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 <stddef.h>
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#include <sys/ptrace.h>
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/* Does AIX define this in <errno.h>? */
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extern int errno;
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#ifndef NO_SYS_REG_H
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#include <sys/reg.h>
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#endif
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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 tm-i386v.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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USP, 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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/* The code below only work on the aix ps/2 (i386-ibm-aix) -
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* mtranle@paris - Sat Apr 11 10:34:12 1992
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*/
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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_unfiltered ("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_unfiltered ("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_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 = 7- ((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 >> ((7 - 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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i387_to_double ((char *)ep->regs[fpreg], (char *)&val);
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printf_unfiltered (" %#g\n", val);
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}
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}
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static struct env387 core_env387;
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void
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i386_float_info ()
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{
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struct env387 fps;
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int fpsaved = 0;
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if (inferior_pid)
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{
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char buf[10];
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unsigned short status;
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ptrace (PT_READ_FPR, inferior_pid, buf, offsetof(struct env387, status));
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memcpy (&status, buf, sizeof (status));
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fpsaved = status;
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}
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else
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{
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if ((fpsaved = core_env387.status) != 0)
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memcpy(&fps, &core_env387, sizeof(fps));
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}
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if (fpsaved == 0)
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{
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printf_unfiltered ("no floating point status saved\n");
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return;
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}
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if (inferior_pid)
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{
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int offset;
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for (offset = 0; offset < sizeof(fps); offset += 10)
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{
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char buf[10];
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ptrace (PT_READ_FPR, inferior_pid, buf, offset);
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memcpy ((char *)&fps.control + offset, buf,
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MIN(10, sizeof(fps) - offset));
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}
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}
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print_387_status (0, (struct env387 *)&fps);
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}
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/* Fetch one register. */
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static void
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fetch_register (regno)
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int regno;
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{
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char buf[MAX_REGISTER_RAW_SIZE];
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if (regno < FP0_REGNUM)
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*(int *)buf = ptrace (PT_READ_GPR, inferior_pid,
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PT_REG(regmap[regno]), 0, 0);
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else
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ptrace (PT_READ_FPR, inferior_pid, buf,
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(regno - FP0_REGNUM)*10 + offsetof(struct env387, regs));
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supply_register (regno, buf);
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}
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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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if (regno < 0)
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for (regno = 0; regno < NUM_REGS; regno++)
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fetch_register (regno);
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else
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fetch_register (regno);
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}
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/* store one register */
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static void
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store_register (regno)
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int regno;
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{
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char buf[80];
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extern char registers[];
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errno = 0;
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if (regno < FP0_REGNUM)
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ptrace (PT_WRITE_GPR, inferior_pid, PT_REG(regmap[regno]),
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*(int *) ®isters[REGISTER_BYTE (regno)], 0);
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else
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ptrace (PT_WRITE_FPR, inferior_pid, ®isters[REGISTER_BYTE (regno)],
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(regno - FP0_REGNUM)*10 + offsetof(struct env387, regs));
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if (errno != 0)
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{
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sprintf (buf, "writing register number %d", regno);
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perror_with_name (buf);
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}
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}
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/* Store our register values back into the inferior.
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If REGNO is -1, do this for all registers.
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Otherwise, REGNO specifies which register (so we can save time). */
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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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if (regno < 0)
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for (regno = 0; regno < NUM_REGS; regno++)
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store_register (regno);
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else
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store_register (regno);
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}
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#ifndef CD_AX /* defined in sys/i386/coredump.h */
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# define CD_AX 0
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# define CD_BX 1
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# define CD_CX 2
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# define CD_DX 3
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# define CD_SI 4
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# define CD_DI 5
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# define CD_BP 6
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# define CD_SP 7
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# define CD_FL 8
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# define CD_IP 9
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# define CD_CS 10
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# define CD_DS 11
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# define CD_ES 12
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# define CD_FS 13
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# define CD_GS 14
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# define CD_SS 15
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#endif
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/*
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* The order here in core_regmap[] has to be the same as in
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* regmap[] above.
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*/
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static int core_regmap[] =
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{
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CD_AX, CD_CX, CD_DX, CD_BX,
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CD_SP, CD_BP, CD_SI, CD_DI,
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CD_IP, CD_FL, CD_CS, CD_SS,
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CD_DS, CD_ES, CD_FS, CD_GS,
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};
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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; /* ignored */
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{
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if (which == 0)
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{
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/* Integer registers */
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#define cd_regs(n) ((int *)core_reg_sect)[n]
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#define regs(n) *((int *) ®isters[REGISTER_BYTE (n)])
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int i;
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for (i = 0; i < FP0_REGNUM; i++)
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regs(i) = cd_regs(core_regmap[i]);
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}
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else if (which == 2)
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{
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/* Floating point registers */
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if (core_reg_size >= sizeof (core_env387))
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memcpy (&core_env387, core_reg_sect, core_reg_size);
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else
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fprintf_unfiltered (gdb_stderr, "Couldn't read float regs from core file\n");
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}
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}
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