1 /* Native-dependent code for BSD Unix running on i386's, for GDB.
2 Copyright 1988, 1989, 1991, 1992, 1994 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 #include <machine/reg.h>
23 /* this table must line up with REGISTER_NAMES in tm-i386.h */
24 /* symbols like 'tEAX' come from <machine/reg.h> */
25 static int tregmap[] =
27 tEAX, tECX, tEDX, tEBX,
28 tESP, tEBP, tESI, tEDI,
29 tEIP, tEFLAGS, tCS, tSS
33 static int sregmap[] =
35 sEAX, sECX, sEDX, sEBX,
36 sESP, sEBP, sESI, sEDI,
37 sEIP, sEFLAGS, sCS, sSS
41 /* NetBSD has decided to collapse the s* and t* symbols. So if the s*
42 ones aren't around, use the t* ones for sregmap too. */
44 static int sregmap[] =
46 tEAX, tECX, tEDX, tEBX,
47 tESP, tEBP, tESI, tEDI,
48 tEIP, tEFLAGS, tCS, tSS
52 /* blockend is the value of u.u_ar0, and points to the
53 place where ES is stored. */
56 i386_register_u_addr (blockend, regnum)
60 /* The following condition is a kludge to get at the proper register map
61 depending upon the state of pcb_flag.
62 The proper condition would be
63 if (u.u_pcb.pcb_flag & FM_TRAP)
64 but that would require a ptrace call here and wouldn't work
67 if (blockend < 0x1fcc)
68 return (blockend + 4 * tregmap[regnum]);
70 return (blockend + 4 * sregmap[regnum]);
75 #include "language.h" /* for local_hex_string */
76 #include "floatformat.h"
78 #include <sys/param.h>
81 #include <sys/ioctl.h>
87 #include <sys/resource.h>
89 #define curpcb Xcurpcb /* XXX avoid leaking declaration from pcb.h */
94 #include <sys/ptrace.h>
96 extern void print_387_control_word (); /* i387-tdep.h */
97 extern void print_387_status_word ();
99 #define fpstate save87
100 #define U_FPSTATE(u) u.u_pcb.pcb_savefpu
104 unsigned short control;
106 unsigned short status;
111 unsigned short code_seg;
112 unsigned short opcode;
113 unsigned long operand;
114 unsigned short operand_seg;
116 unsigned char regs[8][10];
120 print_387_status (status, ep)
121 unsigned short status;
129 bothstatus = ((status != 0) && (ep->status != 0));
133 printf_unfiltered ("u: ");
134 print_387_status_word ((unsigned int)status);
140 printf_unfiltered ("e: ");
141 print_387_status_word ((unsigned int)ep->status);
144 print_387_control_word ((unsigned int)ep->control);
145 printf_unfiltered ("last exception: ");
146 printf_unfiltered ("opcode %s; ", local_hex_string(ep->opcode));
147 printf_unfiltered ("pc %s:", local_hex_string(ep->code_seg));
148 printf_unfiltered ("%s; ", local_hex_string(ep->eip));
149 printf_unfiltered ("operand %s", local_hex_string(ep->operand_seg));
150 printf_unfiltered (":%s\n", local_hex_string(ep->operand));
152 top = (ep->status >> 11) & 7;
154 printf_unfiltered ("regno tag msb lsb value\n");
155 for (fpreg = 7; fpreg >= 0; fpreg--)
159 printf_unfiltered ("%s %d: ", fpreg == top ? "=>" : " ", fpreg);
161 switch ((ep->tag >> (fpreg * 2)) & 3)
163 case 0: printf_unfiltered ("valid "); break;
164 case 1: printf_unfiltered ("zero "); break;
165 case 2: printf_unfiltered ("trap "); break;
166 case 3: printf_unfiltered ("empty "); break;
168 for (i = 9; i >= 0; i--)
169 printf_unfiltered ("%02x", ep->regs[fpreg][i]);
171 floatformat_to_double(&floatformat_i387_ext, (char *) ep->regs[fpreg],
173 printf_unfiltered (" %g\n", val);
179 struct user u; /* just for address computations */
181 /* fpstate defined in <sys/user.h> */
182 struct fpstate *fpstatep;
183 char buf[sizeof (struct fpstate) + 2 * sizeof (int)];
186 unsigned int rounded_addr;
187 unsigned int rounded_size;
188 /*extern int corechan;*/
190 extern int inferior_pid;
192 uaddr = (char *)&U_FPSTATE(u) - (char *)&u;
197 rounded_addr = uaddr & -sizeof (int);
198 rounded_size = (((uaddr + sizeof (struct fpstate)) - uaddr) +
199 sizeof (int) - 1) / sizeof (int);
200 skip = uaddr - rounded_addr;
203 for (i = 0; i < rounded_size; i++)
205 *ip++ = ptrace (PT_READ_U, inferior_pid, (caddr_t)rounded_addr, 0);
206 rounded_addr += sizeof (int);
211 printf("float info: can't do a core file (yet)\n");
214 if (lseek (corechan, uaddr, 0) < 0)
215 perror_with_name ("seek on core file");
216 if (myread (corechan, buf, sizeof (struct fpstate)) < 0)
217 perror_with_name ("read from core file");
222 print_387_status (0, (struct env387 *)buf);