1 /* Intel 386 native support.
2 Copyright (C) 1988, 1989, 1991, 1992 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. */
27 #include <sys/types.h>
30 #include <sys/param.h>
34 #include <sys/ioctl.h>
41 #include <sys/ptrace.h>
43 /* Does AIX define this in <errno.h>? */
50 #include "floatformat.h"
54 static void fetch_core_registers PARAMS ((char *, unsigned, int, CORE_ADDR));
57 /* this table must line up with REGISTER_NAMES in tm-i386v.h */
58 /* symbols like 'EAX' come from <sys/reg.h> */
67 /* blockend is the value of u.u_ar0, and points to the
68 * place where GS is stored
72 i386_register_u_addr (blockend, regnum)
77 /* this will be needed if fp registers are reinstated */
78 /* for now, you can look at them with 'info float'
79 * sys5 wont let you change them with ptrace anyway
81 if (regnum >= FP0_REGNUM && regnum <= FP7_REGNUM)
85 ubase = blockend + 4 * (SS + 1) - KSTKSZ;
86 fpstate = ubase + ((char *)&u.u_fpstate - (char *)&u);
87 return (fpstate + 0x1c + 10 * (regnum - FP0_REGNUM));
91 return (blockend + 4 * regmap[regnum]);
95 /* The code below only work on the aix ps/2 (i386-ibm-aix) -
96 * mtranle@paris - Sat Apr 11 10:34:12 1992
101 unsigned short control;
103 unsigned short status;
108 unsigned short code_seg;
109 unsigned short opcode;
110 unsigned long operand;
111 unsigned short operand_seg;
113 unsigned char regs[8][10];
117 print_387_status (status, ep)
118 unsigned short status;
127 bothstatus = ((status != 0) && (ep->status != 0));
131 printf_unfiltered ("u: ");
132 print_387_status_word (status);
138 printf_unfiltered ("e: ");
139 print_387_status_word (ep->status);
142 print_387_control_word (ep->control);
143 printf_unfiltered ("last exception: ");
144 printf_unfiltered ("opcode %s; ", local_hex_string(ep->opcode));
145 printf_unfiltered ("pc %s:", local_hex_string(ep->code_seg));
146 printf_unfiltered ("%s; ", local_hex_string(ep->eip));
147 printf_unfiltered ("operand %s", local_hex_string(ep->operand_seg));
148 printf_unfiltered (":%s\n", local_hex_string(ep->operand));
150 top = ((ep->status >> 11) & 7);
152 printf_unfiltered ("regno tag msb lsb value\n");
153 for (fpreg = 7; fpreg >= 0; fpreg--)
157 printf_unfiltered ("%s %d: ", fpreg == top ? "=>" : " ", fpreg);
159 switch ((ep->tag >> ((7 - fpreg) * 2)) & 3)
161 case 0: printf_unfiltered ("valid "); break;
162 case 1: printf_unfiltered ("zero "); break;
163 case 2: printf_unfiltered ("trap "); break;
164 case 3: printf_unfiltered ("empty "); break;
166 for (i = 9; i >= 0; i--)
167 printf_unfiltered ("%02x", ep->regs[fpreg][i]);
169 i387_to_double ((char *)ep->regs[fpreg], (char *)&val);
170 printf_unfiltered (" %#g\n", val);
174 static struct env387 core_env387;
181 /* We need to reverse the order of the registers. Apparently AIX stores
182 the highest-numbered ones first. */
183 struct env387 fps_fixed;
189 unsigned short status;
191 ptrace (PT_READ_FPR, inferior_pid, buf, offsetof(struct env387, status));
192 memcpy (&status, buf, sizeof (status));
197 if ((fpsaved = core_env387.status) != 0)
198 memcpy(&fps, &core_env387, sizeof(fps));
203 printf_unfiltered ("no floating point status saved\n");
210 for (offset = 0; offset < sizeof(fps); offset += 10)
213 ptrace (PT_READ_FPR, inferior_pid, buf, offset);
214 memcpy ((char *)&fps.control + offset, buf,
215 MIN(10, sizeof(fps) - offset));
219 for (i = 0; i < 8; ++i)
220 memcpy (fps_fixed.regs[i], fps.regs[7 - i], 10);
221 print_387_status (0, &fps_fixed);
224 /* Fetch one register. */
226 fetch_register (regno)
229 char buf[MAX_REGISTER_RAW_SIZE];
230 if (regno < FP0_REGNUM)
231 *(int *)buf = ptrace (PT_READ_GPR, inferior_pid,
232 PT_REG(regmap[regno]), 0, 0);
234 ptrace (PT_READ_FPR, inferior_pid, buf,
235 (regno - FP0_REGNUM)*10 + offsetof(struct env387, regs));
236 supply_register (regno, buf);
240 fetch_inferior_registers (regno)
244 for (regno = 0; regno < NUM_REGS; regno++)
245 fetch_register (regno);
247 fetch_register (regno);
250 /* store one register */
252 store_register (regno)
256 extern char registers[];
258 if (regno < FP0_REGNUM)
259 ptrace (PT_WRITE_GPR, inferior_pid, PT_REG(regmap[regno]),
260 *(int *) ®isters[REGISTER_BYTE (regno)], 0);
262 ptrace (PT_WRITE_FPR, inferior_pid, ®isters[REGISTER_BYTE (regno)],
263 (regno - FP0_REGNUM)*10 + offsetof(struct env387, regs));
267 sprintf (buf, "writing register number %d", regno);
268 perror_with_name (buf);
272 /* Store our register values back into the inferior.
273 If REGNO is -1, do this for all registers.
274 Otherwise, REGNO specifies which register (so we can save time). */
276 store_inferior_registers (regno)
280 for (regno = 0; regno < NUM_REGS; regno++)
281 store_register (regno);
283 store_register (regno);
286 #ifndef CD_AX /* defined in sys/i386/coredump.h */
306 * The order here in core_regmap[] has to be the same as in
309 static int core_regmap[] =
311 CD_AX, CD_CX, CD_DX, CD_BX,
312 CD_SP, CD_BP, CD_SI, CD_DI,
313 CD_IP, CD_FL, CD_CS, CD_SS,
314 CD_DS, CD_ES, CD_FS, CD_GS,
318 fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
320 unsigned core_reg_size;
322 CORE_ADDR reg_addr; /* ignored */
327 /* Integer registers */
329 #define cd_regs(n) ((int *)core_reg_sect)[n]
330 #define regs(n) *((int *) ®isters[REGISTER_BYTE (n)])
333 for (i = 0; i < FP0_REGNUM; i++)
334 regs(i) = cd_regs(core_regmap[i]);
338 /* Floating point registers */
340 if (core_reg_size >= sizeof (core_env387))
341 memcpy (&core_env387, core_reg_sect, core_reg_size);
343 fprintf_unfiltered (gdb_stderr, "Couldn't read float regs from core file\n");
348 /* Register that we are able to handle i386aix core file formats.
349 FIXME: is this really bfd_target_unknown_flavour? */
351 static struct core_fns i386aix_core_fns =
353 bfd_target_unknown_flavour,
354 fetch_core_registers,
359 _initialize_core_i386aix ()
361 add_core_fns (&i386aix_core_fns);