Commit | Line | Data |
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e49d4fa6 | 1 | /* Native debugging support for Intel x86 running DJGPP. |
e24d4c64 | 2 | Copyright 1997, 1999, 2000, 2001 Free Software Foundation, Inc. |
e49d4fa6 SS |
3 | Written by Robert Hoehne. |
4 | ||
c5aa993b | 5 | This file is part of GDB. |
e49d4fa6 | 6 | |
c5aa993b JM |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
e49d4fa6 | 11 | |
c5aa993b JM |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
e49d4fa6 | 16 | |
c5aa993b JM |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
e49d4fa6 SS |
21 | |
22 | #include <fcntl.h> | |
23 | ||
24 | #include "defs.h" | |
e49d4fa6 | 25 | #include "inferior.h" |
03f2053f | 26 | #include "gdb_wait.h" |
e49d4fa6 SS |
27 | #include "gdbcore.h" |
28 | #include "command.h" | |
29 | #include "floatformat.h" | |
0fff5247 | 30 | #include "buildsym.h" |
89dea5aa | 31 | #include "i387-nat.h" |
4d277981 | 32 | #include "value.h" |
4e052eda | 33 | #include "regcache.h" |
4d277981 | 34 | #include "gdb_string.h" |
e49d4fa6 | 35 | |
10ba702d | 36 | #include <stdio.h> /* might be required for __DJGPP_MINOR__ */ |
e49d4fa6 | 37 | #include <stdlib.h> |
10ba702d | 38 | #include <ctype.h> |
53a5351d | 39 | #include <errno.h> |
c2c6d25f | 40 | #include <unistd.h> |
10ba702d | 41 | #include <sys/utsname.h> |
53a5351d | 42 | #include <io.h> |
10ba702d EZ |
43 | /* breakpoint.h defines `disable' which is an enum member. */ |
44 | #define disable interrup_disable | |
45 | #include <dos.h> | |
46 | #undef disable | |
53a5351d | 47 | #include <dpmi.h> |
10ba702d | 48 | #include <go32.h> |
e49d4fa6 SS |
49 | #include <debug/v2load.h> |
50 | #include <debug/dbgcom.h> | |
53a5351d JM |
51 | #if __DJGPP_MINOR__ > 2 |
52 | #include <debug/redir.h> | |
53 | #endif | |
e49d4fa6 | 54 | |
b83266a0 SS |
55 | #if __DJGPP_MINOR__ < 3 |
56 | /* This code will be provided from DJGPP 2.03 on. Until then I code it | |
57 | here */ | |
c5aa993b JM |
58 | typedef struct |
59 | { | |
60 | unsigned short sig0; | |
61 | unsigned short sig1; | |
62 | unsigned short sig2; | |
63 | unsigned short sig3; | |
64 | unsigned short exponent:15; | |
65 | unsigned short sign:1; | |
66 | } | |
67 | NPXREG; | |
68 | ||
69 | typedef struct | |
70 | { | |
71 | unsigned int control; | |
72 | unsigned int status; | |
73 | unsigned int tag; | |
74 | unsigned int eip; | |
75 | unsigned int cs; | |
76 | unsigned int dataptr; | |
77 | unsigned int datasel; | |
78 | NPXREG reg[8]; | |
79 | } | |
80 | NPX; | |
b83266a0 SS |
81 | |
82 | static NPX npx; | |
83 | ||
c5aa993b JM |
84 | static void save_npx (void); /* Save the FPU of the debugged program */ |
85 | static void load_npx (void); /* Restore the FPU of the debugged program */ | |
b83266a0 SS |
86 | |
87 | /* ------------------------------------------------------------------------- */ | |
88 | /* Store the contents of the NPX in the global variable `npx'. */ | |
c5aa993b | 89 | /* *INDENT-OFF* */ |
b83266a0 SS |
90 | |
91 | static void | |
92 | save_npx (void) | |
93 | { | |
94 | asm ("inb $0xa0, %%al | |
c5aa993b JM |
95 | testb $0x20, %%al |
96 | jz 1f | |
97 | xorb %% al, %%al | |
98 | outb %% al, $0xf0 | |
99 | movb $0x20, %%al | |
100 | outb %% al, $0xa0 | |
101 | outb %% al, $0x20 | |
b83266a0 | 102 | 1: |
c5aa993b JM |
103 | fnsave % 0 |
104 | fwait " | |
105 | : "=m" (npx) | |
106 | : /* No input */ | |
107 | : "%eax"); | |
b83266a0 | 108 | } |
c5aa993b JM |
109 | |
110 | /* *INDENT-ON* */ | |
111 | ||
112 | ||
113 | ||
114 | ||
115 | ||
b83266a0 SS |
116 | /* ------------------------------------------------------------------------- */ |
117 | /* Reload the contents of the NPX from the global variable `npx'. */ | |
118 | ||
119 | static void | |
120 | load_npx (void) | |
121 | { | |
ba8629a9 | 122 | asm ("frstor %0":"=m" (npx)); |
b83266a0 | 123 | } |
53a5351d JM |
124 | /* ------------------------------------------------------------------------- */ |
125 | /* Stubs for the missing redirection functions. */ | |
126 | typedef struct { | |
127 | char *command; | |
128 | int redirected; | |
129 | } cmdline_t; | |
130 | ||
4d277981 | 131 | void |
ba8629a9 EZ |
132 | redir_cmdline_delete (cmdline_t *ptr) |
133 | { | |
134 | ptr->redirected = 0; | |
135 | } | |
4d277981 EZ |
136 | |
137 | int | |
138 | redir_cmdline_parse (const char *args, cmdline_t *ptr) | |
53a5351d JM |
139 | { |
140 | return -1; | |
141 | } | |
ba8629a9 | 142 | |
4d277981 EZ |
143 | int |
144 | redir_to_child (cmdline_t *ptr) | |
53a5351d JM |
145 | { |
146 | return 1; | |
147 | } | |
ba8629a9 | 148 | |
4d277981 EZ |
149 | int |
150 | redir_to_debugger (cmdline_t *ptr) | |
53a5351d JM |
151 | { |
152 | return 1; | |
153 | } | |
ba8629a9 | 154 | |
4d277981 | 155 | int |
ba8629a9 EZ |
156 | redir_debug_init (cmdline_t *ptr) |
157 | { | |
158 | return 0; | |
159 | } | |
b83266a0 SS |
160 | #endif /* __DJGPP_MINOR < 3 */ |
161 | ||
53a5351d JM |
162 | typedef enum { wp_insert, wp_remove, wp_count } wp_op; |
163 | ||
164 | /* This holds the current reference counts for each debug register. */ | |
165 | static int dr_ref_count[4]; | |
166 | ||
e49d4fa6 SS |
167 | #define SOME_PID 42 |
168 | ||
e49d4fa6 | 169 | static int prog_has_started = 0; |
c5aa993b JM |
170 | static void go32_open (char *name, int from_tty); |
171 | static void go32_close (int quitting); | |
172 | static void go32_attach (char *args, int from_tty); | |
173 | static void go32_detach (char *args, int from_tty); | |
39f77062 KB |
174 | static void go32_resume (ptid_t ptid, int step, |
175 | enum target_signal siggnal); | |
176 | static ptid_t go32_wait (ptid_t ptid, | |
177 | struct target_waitstatus *status); | |
c5aa993b JM |
178 | static void go32_fetch_registers (int regno); |
179 | static void store_register (int regno); | |
180 | static void go32_store_registers (int regno); | |
181 | static void go32_prepare_to_store (void); | |
182 | static int go32_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, | |
a17b5c4e EZ |
183 | int write, |
184 | struct mem_attrib *attrib, | |
185 | struct target_ops *target); | |
c5aa993b JM |
186 | static void go32_files_info (struct target_ops *target); |
187 | static void go32_stop (void); | |
188 | static void go32_kill_inferior (void); | |
189 | static void go32_create_inferior (char *exec_file, char *args, char **env); | |
190 | static void go32_mourn_inferior (void); | |
191 | static int go32_can_run (void); | |
b83266a0 SS |
192 | |
193 | static struct target_ops go32_ops; | |
c5aa993b JM |
194 | static void go32_terminal_init (void); |
195 | static void go32_terminal_inferior (void); | |
196 | static void go32_terminal_ours (void); | |
e49d4fa6 | 197 | |
53a5351d | 198 | #define r_ofs(x) (offsetof(TSS,x)) |
e49d4fa6 SS |
199 | |
200 | static struct | |
201 | { | |
53a5351d JM |
202 | size_t tss_ofs; |
203 | size_t size; | |
e49d4fa6 SS |
204 | } |
205 | regno_mapping[] = | |
206 | { | |
0fff5247 EZ |
207 | {r_ofs (tss_eax), 4}, /* normal registers, from a_tss */ |
208 | {r_ofs (tss_ecx), 4}, | |
209 | {r_ofs (tss_edx), 4}, | |
210 | {r_ofs (tss_ebx), 4}, | |
211 | {r_ofs (tss_esp), 4}, | |
212 | {r_ofs (tss_ebp), 4}, | |
213 | {r_ofs (tss_esi), 4}, | |
214 | {r_ofs (tss_edi), 4}, | |
215 | {r_ofs (tss_eip), 4}, | |
216 | {r_ofs (tss_eflags), 4}, | |
217 | {r_ofs (tss_cs), 2}, | |
218 | {r_ofs (tss_ss), 2}, | |
219 | {r_ofs (tss_ds), 2}, | |
220 | {r_ofs (tss_es), 2}, | |
221 | {r_ofs (tss_fs), 2}, | |
222 | {r_ofs (tss_gs), 2}, | |
223 | {0, 10}, /* 8 FP registers, from npx.reg[] */ | |
224 | {1, 10}, | |
225 | {2, 10}, | |
226 | {3, 10}, | |
227 | {4, 10}, | |
228 | {5, 10}, | |
229 | {6, 10}, | |
230 | {7, 10}, | |
53a5351d | 231 | /* The order of the next 7 registers must be consistent |
0fff5247 EZ |
232 | with their numbering in config/i386/tm-i386.h, which see. */ |
233 | {0, 2}, /* control word, from npx */ | |
234 | {4, 2}, /* status word, from npx */ | |
235 | {8, 2}, /* tag word, from npx */ | |
236 | {16, 2}, /* last FP exception CS from npx */ | |
237 | {12, 4}, /* last FP exception EIP from npx */ | |
238 | {24, 2}, /* last FP exception operand selector from npx */ | |
239 | {20, 4}, /* last FP exception operand offset from npx */ | |
240 | {18, 2} /* last FP opcode from npx */ | |
e49d4fa6 SS |
241 | }; |
242 | ||
243 | static struct | |
244 | { | |
245 | int go32_sig; | |
0fff5247 | 246 | enum target_signal gdb_sig; |
e49d4fa6 SS |
247 | } |
248 | sig_map[] = | |
249 | { | |
0fff5247 EZ |
250 | {0, TARGET_SIGNAL_FPE}, |
251 | {1, TARGET_SIGNAL_TRAP}, | |
53a5351d JM |
252 | /* Exception 2 is triggered by the NMI. DJGPP handles it as SIGILL, |
253 | but I think SIGBUS is better, since the NMI is usually activated | |
254 | as a result of a memory parity check failure. */ | |
0fff5247 EZ |
255 | {2, TARGET_SIGNAL_BUS}, |
256 | {3, TARGET_SIGNAL_TRAP}, | |
257 | {4, TARGET_SIGNAL_FPE}, | |
258 | {5, TARGET_SIGNAL_SEGV}, | |
259 | {6, TARGET_SIGNAL_ILL}, | |
260 | {7, TARGET_SIGNAL_EMT}, /* no-coprocessor exception */ | |
261 | {8, TARGET_SIGNAL_SEGV}, | |
262 | {9, TARGET_SIGNAL_SEGV}, | |
263 | {10, TARGET_SIGNAL_BUS}, | |
264 | {11, TARGET_SIGNAL_SEGV}, | |
265 | {12, TARGET_SIGNAL_SEGV}, | |
266 | {13, TARGET_SIGNAL_SEGV}, | |
267 | {14, TARGET_SIGNAL_SEGV}, | |
268 | {16, TARGET_SIGNAL_FPE}, | |
269 | {17, TARGET_SIGNAL_BUS}, | |
270 | {31, TARGET_SIGNAL_ILL}, | |
271 | {0x1b, TARGET_SIGNAL_INT}, | |
272 | {0x75, TARGET_SIGNAL_FPE}, | |
273 | {0x78, TARGET_SIGNAL_ALRM}, | |
274 | {0x79, TARGET_SIGNAL_INT}, | |
275 | {0x7a, TARGET_SIGNAL_QUIT}, | |
276 | {-1, TARGET_SIGNAL_LAST} | |
e49d4fa6 SS |
277 | }; |
278 | ||
53a5351d JM |
279 | static struct { |
280 | enum target_signal gdb_sig; | |
281 | int djgpp_excepno; | |
282 | } excepn_map[] = { | |
0fff5247 EZ |
283 | {TARGET_SIGNAL_0, -1}, |
284 | {TARGET_SIGNAL_ILL, 6}, /* Invalid Opcode */ | |
285 | {TARGET_SIGNAL_EMT, 7}, /* triggers SIGNOFP */ | |
286 | {TARGET_SIGNAL_SEGV, 13}, /* GPF */ | |
287 | {TARGET_SIGNAL_BUS, 17}, /* Alignment Check */ | |
53a5351d JM |
288 | /* The rest are fake exceptions, see dpmiexcp.c in djlsr*.zip for |
289 | details. */ | |
0fff5247 EZ |
290 | {TARGET_SIGNAL_TERM, 0x1b}, /* triggers Ctrl-Break type of SIGINT */ |
291 | {TARGET_SIGNAL_FPE, 0x75}, | |
292 | {TARGET_SIGNAL_INT, 0x79}, | |
293 | {TARGET_SIGNAL_QUIT, 0x7a}, | |
294 | {TARGET_SIGNAL_ALRM, 0x78}, /* triggers SIGTIMR */ | |
295 | {TARGET_SIGNAL_PROF, 0x78}, | |
296 | {TARGET_SIGNAL_LAST, -1} | |
53a5351d JM |
297 | }; |
298 | ||
e49d4fa6 | 299 | static void |
4d277981 | 300 | go32_open (char *name, int from_tty) |
e49d4fa6 | 301 | { |
53a5351d | 302 | printf_unfiltered ("Done. Use the \"run\" command to run the program.\n"); |
e49d4fa6 SS |
303 | } |
304 | ||
305 | static void | |
4d277981 | 306 | go32_close (int quitting) |
e49d4fa6 SS |
307 | { |
308 | } | |
309 | ||
310 | static void | |
4d277981 | 311 | go32_attach (char *args, int from_tty) |
e49d4fa6 | 312 | { |
53a5351d JM |
313 | error ("\ |
314 | You cannot attach to a running program on this platform.\n\ | |
315 | Use the `run' command to run DJGPP programs."); | |
e49d4fa6 SS |
316 | } |
317 | ||
318 | static void | |
4d277981 | 319 | go32_detach (char *args, int from_tty) |
e49d4fa6 SS |
320 | { |
321 | } | |
322 | ||
323 | static int resume_is_step; | |
53a5351d | 324 | static int resume_signal = -1; |
e49d4fa6 SS |
325 | |
326 | static void | |
39f77062 | 327 | go32_resume (ptid_t ptid, int step, enum target_signal siggnal) |
c5aa993b | 328 | { |
53a5351d JM |
329 | int i; |
330 | ||
c5aa993b | 331 | resume_is_step = step; |
53a5351d JM |
332 | |
333 | if (siggnal != TARGET_SIGNAL_0 && siggnal != TARGET_SIGNAL_TRAP) | |
334 | { | |
0fff5247 EZ |
335 | for (i = 0, resume_signal = -1; |
336 | excepn_map[i].gdb_sig != TARGET_SIGNAL_LAST; i++) | |
53a5351d JM |
337 | if (excepn_map[i].gdb_sig == siggnal) |
338 | { | |
339 | resume_signal = excepn_map[i].djgpp_excepno; | |
340 | break; | |
341 | } | |
342 | if (resume_signal == -1) | |
343 | printf_unfiltered ("Cannot deliver signal %s on this platform.\n", | |
344 | target_signal_to_name (siggnal)); | |
345 | } | |
c5aa993b | 346 | } |
e49d4fa6 | 347 | |
53a5351d JM |
348 | static char child_cwd[FILENAME_MAX]; |
349 | ||
31616044 | 350 | static ptid_t |
39f77062 | 351 | go32_wait (ptid_t ptid, struct target_waitstatus *status) |
e49d4fa6 SS |
352 | { |
353 | int i; | |
53a5351d | 354 | unsigned char saved_opcode; |
0fff5247 | 355 | unsigned long INT3_addr = 0; |
53a5351d | 356 | int stepping_over_INT = 0; |
e49d4fa6 | 357 | |
53a5351d | 358 | a_tss.tss_eflags &= 0xfeff; /* reset the single-step flag (TF) */ |
e49d4fa6 | 359 | if (resume_is_step) |
53a5351d JM |
360 | { |
361 | /* If the next instruction is INT xx or INTO, we need to handle | |
362 | them specially. Intel manuals say that these instructions | |
363 | reset the single-step flag (a.k.a. TF). However, it seems | |
364 | that, at least in the DPMI environment, and at least when | |
365 | stepping over the DPMI interrupt 31h, the problem is having | |
366 | TF set at all when INT 31h is executed: the debuggee either | |
367 | crashes (and takes the system with it) or is killed by a | |
368 | SIGTRAP. | |
369 | ||
370 | So we need to emulate single-step mode: we put an INT3 opcode | |
371 | right after the INT xx instruction, let the debuggee run | |
372 | until it hits INT3 and stops, then restore the original | |
373 | instruction which we overwrote with the INT3 opcode, and back | |
374 | up the debuggee's EIP to that instruction. */ | |
375 | read_child (a_tss.tss_eip, &saved_opcode, 1); | |
376 | if (saved_opcode == 0xCD || saved_opcode == 0xCE) | |
377 | { | |
378 | unsigned char INT3_opcode = 0xCC; | |
379 | ||
380 | INT3_addr | |
381 | = saved_opcode == 0xCD ? a_tss.tss_eip + 2 : a_tss.tss_eip + 1; | |
382 | stepping_over_INT = 1; | |
383 | read_child (INT3_addr, &saved_opcode, 1); | |
384 | write_child (INT3_addr, &INT3_opcode, 1); | |
385 | } | |
386 | else | |
387 | a_tss.tss_eflags |= 0x0100; /* normal instruction: set TF */ | |
388 | } | |
389 | ||
390 | /* The special value FFFFh in tss_trap indicates to run_child that | |
391 | tss_irqn holds a signal to be delivered to the debuggee. */ | |
392 | if (resume_signal <= -1) | |
393 | { | |
394 | a_tss.tss_trap = 0; | |
395 | a_tss.tss_irqn = 0xff; | |
396 | } | |
e49d4fa6 | 397 | else |
53a5351d JM |
398 | { |
399 | a_tss.tss_trap = 0xffff; /* run_child looks for this */ | |
400 | a_tss.tss_irqn = resume_signal; | |
401 | } | |
402 | ||
403 | /* The child might change working directory behind our back. The | |
404 | GDB users won't like the side effects of that when they work with | |
405 | relative file names, and GDB might be confused by its current | |
406 | directory not being in sync with the truth. So we always make a | |
407 | point of changing back to where GDB thinks is its cwd, when we | |
408 | return control to the debugger, but restore child's cwd before we | |
409 | run it. */ | |
3a45aed8 EZ |
410 | /* Initialize child_cwd, before the first call to run_child and not |
411 | in the initialization, so the child get also the changed directory | |
412 | set with the gdb-command "cd ..." */ | |
413 | if (!*child_cwd) | |
414 | /* Initialize child's cwd with the current one. */ | |
415 | getcwd (child_cwd, sizeof (child_cwd)); | |
4d277981 | 416 | |
53a5351d | 417 | chdir (child_cwd); |
e49d4fa6 | 418 | |
b83266a0 | 419 | #if __DJGPP_MINOR__ < 3 |
53a5351d | 420 | load_npx (); |
b83266a0 | 421 | #endif |
e49d4fa6 | 422 | run_child (); |
b83266a0 | 423 | #if __DJGPP_MINOR__ < 3 |
53a5351d | 424 | save_npx (); |
b83266a0 | 425 | #endif |
e49d4fa6 | 426 | |
53a5351d JM |
427 | /* Did we step over an INT xx instruction? */ |
428 | if (stepping_over_INT && a_tss.tss_eip == INT3_addr + 1) | |
429 | { | |
430 | /* Restore the original opcode. */ | |
431 | a_tss.tss_eip--; /* EIP points *after* the INT3 instruction */ | |
432 | write_child (a_tss.tss_eip, &saved_opcode, 1); | |
433 | /* Simulate a TRAP exception. */ | |
434 | a_tss.tss_irqn = 1; | |
435 | a_tss.tss_eflags |= 0x0100; | |
436 | } | |
437 | ||
438 | getcwd (child_cwd, sizeof (child_cwd)); /* in case it has changed */ | |
439 | chdir (current_directory); | |
440 | ||
e49d4fa6 SS |
441 | if (a_tss.tss_irqn == 0x21) |
442 | { | |
443 | status->kind = TARGET_WAITKIND_EXITED; | |
444 | status->value.integer = a_tss.tss_eax & 0xff; | |
445 | } | |
446 | else | |
447 | { | |
448 | status->value.sig = TARGET_SIGNAL_UNKNOWN; | |
449 | status->kind = TARGET_WAITKIND_STOPPED; | |
450 | for (i = 0; sig_map[i].go32_sig != -1; i++) | |
451 | { | |
452 | if (a_tss.tss_irqn == sig_map[i].go32_sig) | |
453 | { | |
53a5351d | 454 | #if __DJGPP_MINOR__ < 3 |
e49d4fa6 SS |
455 | if ((status->value.sig = sig_map[i].gdb_sig) != |
456 | TARGET_SIGNAL_TRAP) | |
457 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
53a5351d JM |
458 | #else |
459 | status->value.sig = sig_map[i].gdb_sig; | |
460 | #endif | |
e49d4fa6 SS |
461 | break; |
462 | } | |
463 | } | |
464 | } | |
31616044 | 465 | return pid_to_ptid (SOME_PID); |
e49d4fa6 SS |
466 | } |
467 | ||
468 | static void | |
89dea5aa | 469 | fetch_register (int regno) |
e49d4fa6 | 470 | { |
89dea5aa EZ |
471 | if (regno < FP0_REGNUM) |
472 | supply_register (regno, (char *) &a_tss + regno_mapping[regno].tss_ofs); | |
473 | else if (regno <= LAST_FPU_CTRL_REGNUM) | |
474 | i387_supply_register (regno, (char *) &npx); | |
475 | else | |
476 | internal_error (__FILE__, __LINE__, | |
477 | "Invalid register no. %d in fetch_register.", regno); | |
478 | } | |
e49d4fa6 | 479 | |
89dea5aa EZ |
480 | static void |
481 | go32_fetch_registers (int regno) | |
482 | { | |
483 | if (regno >= 0) | |
484 | fetch_register (regno); | |
485 | else | |
e49d4fa6 | 486 | { |
89dea5aa EZ |
487 | for (regno = 0; regno < FP0_REGNUM; regno++) |
488 | fetch_register (regno); | |
489 | i387_supply_fsave ((char *) &npx); | |
e49d4fa6 SS |
490 | } |
491 | } | |
492 | ||
493 | static void | |
494 | store_register (int regno) | |
495 | { | |
496 | void *rp; | |
4d277981 | 497 | void *v = (void *) register_buffer (regno); |
e49d4fa6 | 498 | |
89dea5aa EZ |
499 | if (regno < FP0_REGNUM) |
500 | memcpy ((char *) &a_tss + regno_mapping[regno].tss_ofs, | |
501 | v, regno_mapping[regno].size); | |
502 | else if (regno <= LAST_FPU_CTRL_REGNUM) | |
503 | i387_fill_fsave ((char *)&npx, regno); | |
e49d4fa6 | 504 | else |
8e65ff28 AC |
505 | internal_error (__FILE__, __LINE__, |
506 | "Invalid register no. %d in store_register.", regno); | |
e49d4fa6 SS |
507 | } |
508 | ||
509 | static void | |
510 | go32_store_registers (int regno) | |
511 | { | |
0fff5247 | 512 | unsigned r; |
e49d4fa6 SS |
513 | |
514 | if (regno >= 0) | |
515 | store_register (regno); | |
516 | else | |
517 | { | |
89dea5aa | 518 | for (r = 0; r < FP0_REGNUM; r++) |
e49d4fa6 | 519 | store_register (r); |
89dea5aa | 520 | i387_fill_fsave ((char *) &npx, -1); |
e49d4fa6 SS |
521 | } |
522 | } | |
523 | ||
524 | static void | |
525 | go32_prepare_to_store (void) | |
526 | { | |
527 | } | |
528 | ||
529 | static int | |
530 | go32_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, | |
4d277981 | 531 | struct mem_attrib *attrib, struct target_ops *target) |
e49d4fa6 SS |
532 | { |
533 | if (write) | |
534 | { | |
535 | if (write_child (memaddr, myaddr, len)) | |
536 | { | |
537 | return 0; | |
538 | } | |
539 | else | |
540 | { | |
541 | return len; | |
542 | } | |
543 | } | |
544 | else | |
545 | { | |
546 | if (read_child (memaddr, myaddr, len)) | |
547 | { | |
548 | return 0; | |
549 | } | |
550 | else | |
551 | { | |
552 | return len; | |
553 | } | |
554 | } | |
555 | } | |
556 | ||
53a5351d JM |
557 | static cmdline_t child_cmd; /* parsed child's command line kept here */ |
558 | ||
e49d4fa6 | 559 | static void |
4d277981 | 560 | go32_files_info (struct target_ops *target) |
e49d4fa6 | 561 | { |
53a5351d | 562 | printf_unfiltered ("You are running a DJGPP V2 program.\n"); |
e49d4fa6 SS |
563 | } |
564 | ||
565 | static void | |
566 | go32_stop (void) | |
567 | { | |
568 | normal_stop (); | |
569 | cleanup_client (); | |
39f77062 | 570 | inferior_ptid = null_ptid; |
e49d4fa6 SS |
571 | prog_has_started = 0; |
572 | } | |
573 | ||
574 | static void | |
575 | go32_kill_inferior (void) | |
576 | { | |
53a5351d JM |
577 | redir_cmdline_delete (&child_cmd); |
578 | resume_signal = -1; | |
579 | resume_is_step = 0; | |
e49d4fa6 SS |
580 | unpush_target (&go32_ops); |
581 | } | |
582 | ||
583 | static void | |
584 | go32_create_inferior (char *exec_file, char *args, char **env) | |
585 | { | |
4d277981 | 586 | extern char **environ; |
e49d4fa6 SS |
587 | jmp_buf start_state; |
588 | char *cmdline; | |
589 | char **env_save = environ; | |
590 | ||
0fff5247 EZ |
591 | /* If no exec file handed to us, get it from the exec-file command -- with |
592 | a good, common error message if none is specified. */ | |
593 | if (exec_file == 0) | |
594 | exec_file = get_exec_file (1); | |
595 | ||
e49d4fa6 SS |
596 | if (prog_has_started) |
597 | { | |
b83266a0 | 598 | go32_stop (); |
e49d4fa6 SS |
599 | go32_kill_inferior (); |
600 | } | |
53a5351d JM |
601 | resume_signal = -1; |
602 | resume_is_step = 0; | |
3a45aed8 EZ |
603 | |
604 | /* Initialize child's cwd as empty to be initialized when starting | |
605 | the child. */ | |
606 | *child_cwd = 0; | |
607 | ||
53a5351d JM |
608 | /* Init command line storage. */ |
609 | if (redir_debug_init (&child_cmd) == -1) | |
8e65ff28 AC |
610 | internal_error (__FILE__, __LINE__, |
611 | "Cannot allocate redirection storage: not enough memory.\n"); | |
53a5351d JM |
612 | |
613 | /* Parse the command line and create redirections. */ | |
614 | if (strpbrk (args, "<>")) | |
615 | { | |
616 | if (redir_cmdline_parse (args, &child_cmd) == 0) | |
617 | args = child_cmd.command; | |
618 | else | |
619 | error ("Syntax error in command line."); | |
620 | } | |
621 | else | |
c2d11a7d | 622 | child_cmd.command = xstrdup (args); |
e49d4fa6 SS |
623 | |
624 | cmdline = (char *) alloca (strlen (args) + 4); | |
625 | cmdline[0] = strlen (args); | |
626 | strcpy (cmdline + 1, args); | |
627 | cmdline[strlen (args) + 1] = 13; | |
628 | ||
629 | environ = env; | |
630 | ||
631 | if (v2loadimage (exec_file, cmdline, start_state)) | |
632 | { | |
633 | environ = env_save; | |
634 | printf_unfiltered ("Load failed for image %s\n", exec_file); | |
635 | exit (1); | |
636 | } | |
637 | environ = env_save; | |
638 | ||
639 | edi_init (start_state); | |
53a5351d JM |
640 | #if __DJGPP_MINOR__ < 3 |
641 | save_npx (); | |
642 | #endif | |
e49d4fa6 | 643 | |
39f77062 | 644 | inferior_ptid = pid_to_ptid (SOME_PID); |
e49d4fa6 SS |
645 | push_target (&go32_ops); |
646 | clear_proceed_status (); | |
647 | insert_breakpoints (); | |
2acceee2 | 648 | proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0); |
b83266a0 | 649 | prog_has_started = 1; |
e49d4fa6 SS |
650 | } |
651 | ||
652 | static void | |
653 | go32_mourn_inferior (void) | |
654 | { | |
53a5351d JM |
655 | /* We need to make sure all the breakpoint enable bits in the DR7 |
656 | register are reset when the inferior exits. Otherwise, if they | |
657 | rerun the inferior, the uncleared bits may cause random SIGTRAPs, | |
658 | failure to set more watchpoints, and other calamities. It would | |
659 | be nice if GDB itself would take care to remove all breakpoints | |
660 | at all times, but it doesn't, probably under an assumption that | |
661 | the OS cleans up when the debuggee exits. */ | |
e24d4c64 | 662 | i386_cleanup_dregs (); |
e49d4fa6 SS |
663 | go32_kill_inferior (); |
664 | generic_mourn_inferior (); | |
665 | } | |
666 | ||
667 | static int | |
668 | go32_can_run (void) | |
669 | { | |
670 | return 1; | |
671 | } | |
672 | ||
e49d4fa6 SS |
673 | /* Hardware watchpoint support. */ |
674 | ||
e49d4fa6 | 675 | #define D_REGS edi.dr |
e24d4c64 EZ |
676 | #define CONTROL D_REGS[7] |
677 | #define STATUS D_REGS[6] | |
53a5351d | 678 | |
e24d4c64 EZ |
679 | /* Pass the address ADDR to the inferior in the I'th debug register. |
680 | Here we just store the address in D_REGS, the watchpoint will be | |
681 | actually set up when go32_wait runs the debuggee. */ | |
682 | void | |
683 | go32_set_dr (int i, CORE_ADDR addr) | |
e49d4fa6 | 684 | { |
4d277981 EZ |
685 | if (i < 0 || i > 3) |
686 | internal_error (__FILE__, __LINE__, | |
687 | "Invalid register %d in go32_set_dr.\n", i); | |
e24d4c64 | 688 | D_REGS[i] = addr; |
e49d4fa6 SS |
689 | } |
690 | ||
e24d4c64 EZ |
691 | /* Pass the value VAL to the inferior in the DR7 debug control |
692 | register. Here we just store the address in D_REGS, the watchpoint | |
693 | will be actually set up when go32_wait runs the debuggee. */ | |
694 | void | |
695 | go32_set_dr7 (unsigned val) | |
53a5351d | 696 | { |
e24d4c64 | 697 | CONTROL = val; |
53a5351d JM |
698 | } |
699 | ||
e24d4c64 EZ |
700 | /* Get the value of the DR6 debug status register from the inferior. |
701 | Here we just return the value stored in D_REGS, as we've got it | |
702 | from the last go32_wait call. */ | |
703 | unsigned | |
704 | go32_get_dr6 (void) | |
e49d4fa6 | 705 | { |
e24d4c64 | 706 | return STATUS; |
e49d4fa6 SS |
707 | } |
708 | ||
53a5351d JM |
709 | /* Put the device open on handle FD into either raw or cooked |
710 | mode, return 1 if it was in raw mode, zero otherwise. */ | |
711 | ||
712 | static int | |
713 | device_mode (int fd, int raw_p) | |
714 | { | |
715 | int oldmode, newmode; | |
716 | __dpmi_regs regs; | |
717 | ||
718 | regs.x.ax = 0x4400; | |
719 | regs.x.bx = fd; | |
720 | __dpmi_int (0x21, ®s); | |
721 | if (regs.x.flags & 1) | |
722 | return -1; | |
723 | newmode = oldmode = regs.x.dx; | |
724 | ||
725 | if (raw_p) | |
726 | newmode |= 0x20; | |
727 | else | |
728 | newmode &= ~0x20; | |
729 | ||
730 | if (oldmode & 0x80) /* Only for character dev */ | |
731 | { | |
732 | regs.x.ax = 0x4401; | |
733 | regs.x.bx = fd; | |
734 | regs.x.dx = newmode & 0xff; /* Force upper byte zero, else it fails */ | |
735 | __dpmi_int (0x21, ®s); | |
736 | if (regs.x.flags & 1) | |
737 | return -1; | |
738 | } | |
739 | return (oldmode & 0x20) == 0x20; | |
740 | } | |
741 | ||
742 | ||
743 | static int inf_mode_valid = 0; | |
744 | static int inf_terminal_mode; | |
745 | ||
746 | /* This semaphore is needed because, amazingly enough, GDB calls | |
747 | target.to_terminal_ours more than once after the inferior stops. | |
748 | But we need the information from the first call only, since the | |
749 | second call will always see GDB's own cooked terminal. */ | |
750 | static int terminal_is_ours = 1; | |
751 | ||
cce74817 JM |
752 | static void |
753 | go32_terminal_init (void) | |
754 | { | |
53a5351d JM |
755 | inf_mode_valid = 0; /* reinitialize, in case they are restarting child */ |
756 | terminal_is_ours = 1; | |
cce74817 JM |
757 | } |
758 | ||
759 | static void | |
4d277981 | 760 | go32_terminal_info (char *args, int from_tty) |
cce74817 | 761 | { |
53a5351d JM |
762 | printf_unfiltered ("Inferior's terminal is in %s mode.\n", |
763 | !inf_mode_valid | |
764 | ? "default" : inf_terminal_mode ? "raw" : "cooked"); | |
765 | ||
766 | #if __DJGPP_MINOR__ > 2 | |
767 | if (child_cmd.redirection) | |
768 | { | |
769 | int i; | |
770 | ||
771 | for (i = 0; i < DBG_HANDLES; i++) | |
c5aa993b | 772 | { |
53a5351d JM |
773 | if (child_cmd.redirection[i]->file_name) |
774 | printf_unfiltered ("\tFile handle %d is redirected to `%s'.\n", | |
775 | i, child_cmd.redirection[i]->file_name); | |
776 | else if (_get_dev_info (child_cmd.redirection[i]->inf_handle) == -1) | |
777 | printf_unfiltered | |
778 | ("\tFile handle %d appears to be closed by inferior.\n", i); | |
779 | /* Mask off the raw/cooked bit when comparing device info words. */ | |
780 | else if ((_get_dev_info (child_cmd.redirection[i]->inf_handle) & 0xdf) | |
781 | != (_get_dev_info (i) & 0xdf)) | |
782 | printf_unfiltered | |
783 | ("\tFile handle %d appears to be redirected by inferior.\n", i); | |
c5aa993b | 784 | } |
53a5351d JM |
785 | } |
786 | #endif | |
787 | } | |
788 | ||
789 | static void | |
790 | go32_terminal_inferior (void) | |
791 | { | |
792 | /* Redirect standard handles as child wants them. */ | |
793 | errno = 0; | |
794 | if (redir_to_child (&child_cmd) == -1) | |
795 | { | |
796 | redir_to_debugger (&child_cmd); | |
797 | error ("Cannot redirect standard handles for program: %s.", | |
798 | strerror (errno)); | |
799 | } | |
800 | /* set the console device of the inferior to whatever mode | |
801 | (raw or cooked) we found it last time */ | |
802 | if (terminal_is_ours) | |
803 | { | |
804 | if (inf_mode_valid) | |
805 | device_mode (0, inf_terminal_mode); | |
806 | terminal_is_ours = 0; | |
807 | } | |
cce74817 JM |
808 | } |
809 | ||
810 | static void | |
811 | go32_terminal_ours (void) | |
812 | { | |
53a5351d JM |
813 | /* Switch to cooked mode on the gdb terminal and save the inferior |
814 | terminal mode to be restored when it is resumed */ | |
815 | if (!terminal_is_ours) | |
816 | { | |
817 | inf_terminal_mode = device_mode (0, 0); | |
818 | if (inf_terminal_mode != -1) | |
819 | inf_mode_valid = 1; | |
820 | else | |
821 | /* If device_mode returned -1, we don't know what happens with | |
822 | handle 0 anymore, so make the info invalid. */ | |
823 | inf_mode_valid = 0; | |
824 | terminal_is_ours = 1; | |
825 | ||
826 | /* Restore debugger's standard handles. */ | |
827 | errno = 0; | |
828 | if (redir_to_debugger (&child_cmd) == -1) | |
829 | { | |
830 | redir_to_child (&child_cmd); | |
831 | error ("Cannot redirect standard handles for debugger: %s.", | |
832 | strerror (errno)); | |
833 | } | |
834 | } | |
cce74817 JM |
835 | } |
836 | ||
e49d4fa6 SS |
837 | static void |
838 | init_go32_ops (void) | |
839 | { | |
840 | go32_ops.to_shortname = "djgpp"; | |
841 | go32_ops.to_longname = "djgpp target process"; | |
842 | go32_ops.to_doc = | |
843 | "Program loaded by djgpp, when gdb is used as an external debugger"; | |
844 | go32_ops.to_open = go32_open; | |
845 | go32_ops.to_close = go32_close; | |
53a5351d | 846 | go32_ops.to_attach = go32_attach; |
e49d4fa6 SS |
847 | go32_ops.to_detach = go32_detach; |
848 | go32_ops.to_resume = go32_resume; | |
849 | go32_ops.to_wait = go32_wait; | |
850 | go32_ops.to_fetch_registers = go32_fetch_registers; | |
851 | go32_ops.to_store_registers = go32_store_registers; | |
852 | go32_ops.to_prepare_to_store = go32_prepare_to_store; | |
853 | go32_ops.to_xfer_memory = go32_xfer_memory; | |
854 | go32_ops.to_files_info = go32_files_info; | |
855 | go32_ops.to_insert_breakpoint = memory_insert_breakpoint; | |
856 | go32_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
cce74817 JM |
857 | go32_ops.to_terminal_init = go32_terminal_init; |
858 | go32_ops.to_terminal_inferior = go32_terminal_inferior; | |
53a5351d | 859 | go32_ops.to_terminal_ours_for_output = go32_terminal_ours; |
cce74817 | 860 | go32_ops.to_terminal_ours = go32_terminal_ours; |
53a5351d | 861 | go32_ops.to_terminal_info = go32_terminal_info; |
e49d4fa6 SS |
862 | go32_ops.to_kill = go32_kill_inferior; |
863 | go32_ops.to_create_inferior = go32_create_inferior; | |
864 | go32_ops.to_mourn_inferior = go32_mourn_inferior; | |
865 | go32_ops.to_can_run = go32_can_run; | |
866 | go32_ops.to_stop = go32_stop; | |
867 | go32_ops.to_stratum = process_stratum; | |
868 | go32_ops.to_has_all_memory = 1; | |
869 | go32_ops.to_has_memory = 1; | |
870 | go32_ops.to_has_stack = 1; | |
871 | go32_ops.to_has_registers = 1; | |
872 | go32_ops.to_has_execution = 1; | |
873 | go32_ops.to_magic = OPS_MAGIC; | |
53a5351d | 874 | |
3a45aed8 EZ |
875 | /* Initialize child's cwd as empty to be initialized when starting |
876 | the child. */ | |
877 | *child_cwd = 0; | |
53a5351d JM |
878 | |
879 | /* Initialize child's command line storage. */ | |
880 | if (redir_debug_init (&child_cmd) == -1) | |
8e65ff28 AC |
881 | internal_error (__FILE__, __LINE__, |
882 | "Cannot allocate redirection storage: not enough memory.\n"); | |
0fff5247 EZ |
883 | |
884 | /* We are always processing GCC-compiled programs. */ | |
885 | processing_gcc_compilation = 2; | |
e49d4fa6 SS |
886 | } |
887 | ||
10ba702d EZ |
888 | unsigned short windows_major, windows_minor; |
889 | ||
890 | /* Compute the version Windows reports via Int 2Fh/AX=1600h. */ | |
891 | static void | |
892 | go32_get_windows_version(void) | |
893 | { | |
894 | __dpmi_regs r; | |
895 | ||
896 | r.x.ax = 0x1600; | |
897 | __dpmi_int(0x2f, &r); | |
898 | if (r.h.al > 2 && r.h.al != 0x80 && r.h.al != 0xff | |
899 | && (r.h.al > 3 || r.h.ah > 0)) | |
900 | { | |
901 | windows_major = r.h.al; | |
902 | windows_minor = r.h.ah; | |
903 | } | |
904 | else | |
905 | windows_major = 0xff; /* meaning no Windows */ | |
906 | } | |
907 | ||
908 | /* A subroutine of go32_sysinfo to display memory info. */ | |
909 | static void | |
910 | print_mem (unsigned long datum, const char *header, int in_pages_p) | |
911 | { | |
912 | if (datum != 0xffffffffUL) | |
913 | { | |
914 | if (in_pages_p) | |
915 | datum <<= 12; | |
916 | puts_filtered (header); | |
917 | if (datum > 1024) | |
918 | { | |
919 | printf_filtered ("%lu KB", datum >> 10); | |
920 | if (datum > 1024 * 1024) | |
921 | printf_filtered (" (%lu MB)", datum >> 20); | |
922 | } | |
923 | else | |
924 | printf_filtered ("%lu Bytes", datum); | |
925 | puts_filtered ("\n"); | |
926 | } | |
927 | } | |
928 | ||
929 | /* Display assorted information about the underlying OS. */ | |
930 | static void | |
931 | go32_sysinfo (char *arg, int from_tty) | |
932 | { | |
933 | struct utsname u; | |
934 | char cpuid_vendor[13]; | |
935 | unsigned cpuid_max = 0, cpuid_eax, cpuid_ebx, cpuid_ecx, cpuid_edx; | |
936 | unsigned true_dos_version = _get_dos_version (1); | |
937 | unsigned advertized_dos_version = ((unsigned int)_osmajor << 8) | _osminor; | |
938 | int dpmi_flags; | |
939 | char dpmi_vendor_info[129]; | |
940 | int dpmi_vendor_available = | |
941 | __dpmi_get_capabilities (&dpmi_flags, dpmi_vendor_info); | |
942 | __dpmi_version_ret dpmi_version_data; | |
943 | long eflags; | |
944 | __dpmi_free_mem_info mem_info; | |
945 | __dpmi_regs regs; | |
946 | ||
947 | cpuid_vendor[0] = '\0'; | |
948 | if (uname (&u)) | |
949 | strcpy (u.machine, "Unknown x86"); | |
950 | else if (u.machine[0] == 'i' && u.machine[1] > 4) | |
951 | { | |
952 | /* CPUID with EAX = 0 returns the Vendor ID. */ | |
953 | __asm__ __volatile__ ("xorl %%ebx, %%ebx;" | |
954 | "xorl %%ecx, %%ecx;" | |
955 | "xorl %%edx, %%edx;" | |
956 | "movl $0, %%eax;" | |
957 | "cpuid;" | |
958 | "movl %%ebx, %0;" | |
959 | "movl %%edx, %1;" | |
960 | "movl %%ecx, %2;" | |
961 | "movl %%eax, %3;" | |
962 | : "=m" (cpuid_vendor[0]), | |
963 | "=m" (cpuid_vendor[4]), | |
964 | "=m" (cpuid_vendor[8]), | |
965 | "=m" (cpuid_max) | |
966 | : | |
967 | : "%eax", "%ebx", "%ecx", "%edx"); | |
968 | cpuid_vendor[12] = '\0'; | |
969 | } | |
970 | ||
971 | printf_filtered ("CPU Type.......................%s", u.machine); | |
972 | if (cpuid_vendor[0]) | |
973 | printf_filtered (" (%s)", cpuid_vendor); | |
974 | puts_filtered ("\n"); | |
975 | ||
976 | /* CPUID with EAX = 1 returns processor signature and features. */ | |
977 | if (cpuid_max >= 1) | |
978 | { | |
979 | static char *brand_name[] = { | |
980 | "", | |
981 | " Celeron", | |
982 | " III", | |
983 | " III Xeon", | |
984 | "", "", "", "", | |
985 | " 4" | |
986 | }; | |
987 | char cpu_string[80]; | |
988 | char cpu_brand[20]; | |
989 | unsigned brand_idx; | |
990 | int intel_p = strcmp (cpuid_vendor, "GenuineIntel") == 0; | |
991 | int amd_p = strcmp (cpuid_vendor, "AuthenticAMD") == 0; | |
992 | unsigned cpu_family, cpu_model; | |
993 | ||
994 | __asm__ __volatile__ ("movl $1, %%eax;" | |
995 | "cpuid;" | |
996 | : "=a" (cpuid_eax), | |
997 | "=b" (cpuid_ebx), | |
998 | "=d" (cpuid_edx) | |
999 | : | |
1000 | : "%ecx"); | |
1001 | brand_idx = cpuid_ebx & 0xff; | |
1002 | cpu_family = (cpuid_eax >> 8) & 0xf; | |
1003 | cpu_model = (cpuid_eax >> 4) & 0xf; | |
1004 | cpu_brand[0] = '\0'; | |
1005 | if (intel_p) | |
1006 | { | |
1007 | if (brand_idx > 0 | |
1008 | && brand_idx < sizeof(brand_name)/sizeof(brand_name[0]) | |
1009 | && *brand_name[brand_idx]) | |
1010 | strcpy (cpu_brand, brand_name[brand_idx]); | |
1011 | else if (cpu_family == 5) | |
1012 | { | |
1013 | if (((cpuid_eax >> 12) & 3) == 0 && cpu_model == 4) | |
1014 | strcpy (cpu_brand, " MMX"); | |
1015 | else if (cpu_model > 1 && ((cpuid_eax >> 12) & 3) == 1) | |
1016 | strcpy (cpu_brand, " OverDrive"); | |
1017 | else if (cpu_model > 1 && ((cpuid_eax >> 12) & 3) == 2) | |
1018 | strcpy (cpu_brand, " Dual"); | |
1019 | } | |
1020 | else if (cpu_family == 6 && cpu_model < 8) | |
1021 | { | |
1022 | switch (cpu_model) | |
1023 | { | |
1024 | case 1: | |
1025 | strcpy (cpu_brand, " Pro"); | |
1026 | break; | |
1027 | case 3: | |
1028 | strcpy (cpu_brand, " II"); | |
1029 | break; | |
1030 | case 5: | |
1031 | strcpy (cpu_brand, " II Xeon"); | |
1032 | break; | |
1033 | case 6: | |
1034 | strcpy (cpu_brand, " Celeron"); | |
1035 | break; | |
1036 | case 7: | |
1037 | strcpy (cpu_brand, " III"); | |
1038 | break; | |
1039 | } | |
1040 | } | |
1041 | } | |
1042 | else if (amd_p) | |
1043 | { | |
1044 | switch (cpu_family) | |
1045 | { | |
1046 | case 4: | |
1047 | strcpy (cpu_brand, "486/5x86"); | |
1048 | break; | |
1049 | case 5: | |
1050 | switch (cpu_model) | |
1051 | { | |
1052 | case 0: | |
1053 | case 1: | |
1054 | case 2: | |
1055 | case 3: | |
1056 | strcpy (cpu_brand, "-K5"); | |
1057 | break; | |
1058 | case 6: | |
1059 | case 7: | |
1060 | strcpy (cpu_brand, "-K6"); | |
1061 | break; | |
1062 | case 8: | |
1063 | strcpy (cpu_brand, "-K6-2"); | |
1064 | break; | |
1065 | case 9: | |
1066 | strcpy (cpu_brand, "-K6-III"); | |
1067 | break; | |
1068 | } | |
1069 | break; | |
1070 | case 6: | |
1071 | switch (cpu_model) | |
1072 | { | |
1073 | case 1: | |
1074 | case 2: | |
1075 | case 4: | |
1076 | strcpy (cpu_brand, " Athlon"); | |
1077 | break; | |
1078 | case 3: | |
1079 | strcpy (cpu_brand, " Duron"); | |
1080 | break; | |
1081 | } | |
1082 | break; | |
1083 | } | |
1084 | } | |
1085 | sprintf (cpu_string, "%s%s Model %d Stepping %d", | |
1086 | intel_p ? "Pentium" : (amd_p ? "AMD" : "ix86"), | |
1087 | cpu_brand, cpu_model, cpuid_eax & 0xf); | |
1088 | printfi_filtered (31, "%s\n", cpu_string); | |
1089 | if (((cpuid_edx & (6 | (0x0d << 23))) != 0) | |
1090 | || ((cpuid_edx & 1) == 0) | |
1091 | || (amd_p && (cpuid_edx & (3 << 30)) != 0)) | |
1092 | { | |
1093 | puts_filtered ("CPU Features..................."); | |
1094 | /* We only list features which might be useful in the DPMI | |
1095 | environment. */ | |
1096 | if ((cpuid_edx & 1) == 0) | |
1097 | puts_filtered ("No FPU "); /* it's unusual to not have an FPU */ | |
1098 | if ((cpuid_edx & (1 << 1)) != 0) | |
1099 | puts_filtered ("VME "); | |
1100 | if ((cpuid_edx & (1 << 2)) != 0) | |
1101 | puts_filtered ("DE "); | |
1102 | if ((cpuid_edx & (1 << 4)) != 0) | |
1103 | puts_filtered ("TSC "); | |
1104 | if ((cpuid_edx & (1 << 23)) != 0) | |
1105 | puts_filtered ("MMX "); | |
1106 | if ((cpuid_edx & (1 << 25)) != 0) | |
1107 | puts_filtered ("SSE "); | |
1108 | if ((cpuid_edx & (1 << 26)) != 0) | |
1109 | puts_filtered ("SSE2 "); | |
1110 | if (amd_p) | |
1111 | { | |
1112 | if ((cpuid_edx & (1 << 31)) != 0) | |
1113 | puts_filtered ("3DNow! "); | |
1114 | if ((cpuid_edx & (1 << 30)) != 0) | |
1115 | puts_filtered ("3DNow!Ext"); | |
1116 | } | |
1117 | puts_filtered ("\n"); | |
1118 | } | |
1119 | } | |
1120 | puts_filtered ("\n"); | |
1121 | printf_filtered ("DOS Version....................%s %s.%s", | |
1122 | _os_flavor, u.release, u.version); | |
1123 | if (true_dos_version != advertized_dos_version) | |
1124 | printf_filtered (" (disguised as v%d.%d)", _osmajor, _osminor); | |
1125 | puts_filtered ("\n"); | |
1126 | if (!windows_major) | |
1127 | go32_get_windows_version (); | |
1128 | if (windows_major != 0xff) | |
1129 | { | |
1130 | const char *windows_flavor; | |
1131 | ||
1132 | printf_filtered ("Windows Version................%d.%02d (Windows ", | |
1133 | windows_major, windows_minor); | |
1134 | switch (windows_major) | |
1135 | { | |
1136 | case 3: | |
1137 | windows_flavor = "3.X"; | |
1138 | break; | |
1139 | case 4: | |
1140 | switch (windows_minor) | |
1141 | { | |
1142 | case 0: | |
1143 | windows_flavor = "95, 95A, or 95B"; | |
1144 | break; | |
1145 | case 3: | |
1146 | windows_flavor = "95B OSR2.1 or 95C OSR2.5"; | |
1147 | break; | |
1148 | case 10: | |
1149 | windows_flavor = "98 or 98 SE"; | |
1150 | break; | |
1151 | case 90: | |
1152 | windows_flavor = "ME"; | |
1153 | break; | |
1154 | default: | |
1155 | windows_flavor = "9X"; | |
1156 | break; | |
1157 | } | |
1158 | break; | |
1159 | default: | |
1160 | windows_flavor = "??"; | |
1161 | break; | |
1162 | } | |
1163 | printf_filtered ("%s)\n", windows_flavor); | |
1164 | } | |
1165 | else if (true_dos_version == 0x532 && advertized_dos_version == 0x500) | |
1166 | printf_filtered ("Windows Version................Windows NT or Windows 2000\n"); | |
1167 | puts_filtered ("\n"); | |
1168 | if (dpmi_vendor_available == 0) | |
1169 | { | |
1170 | /* The DPMI spec says the vendor string should be ASCIIZ, but | |
1171 | I don't trust the vendors to follow that... */ | |
1172 | if (!memchr (&dpmi_vendor_info[2], 0, 126)) | |
1173 | dpmi_vendor_info[128] = '\0'; | |
1174 | printf_filtered ("DPMI Host......................%s v%d.%d (capabilities: %#x)\n", | |
1175 | &dpmi_vendor_info[2], | |
1176 | (unsigned)dpmi_vendor_info[0], | |
1177 | (unsigned)dpmi_vendor_info[1], | |
1178 | ((unsigned)dpmi_flags & 0x7f)); | |
1179 | } | |
1180 | __dpmi_get_version (&dpmi_version_data); | |
1181 | printf_filtered ("DPMI Version...................%d.%02d\n", | |
1182 | dpmi_version_data.major, dpmi_version_data.minor); | |
1183 | printf_filtered ("DPMI Info......................%s-bit DPMI, with%s Virtual Memory support\n", | |
1184 | (dpmi_version_data.flags & 1) ? "32" : "16", | |
1185 | (dpmi_version_data.flags & 4) ? "" : "out"); | |
1186 | printfi_filtered (31, "Interrupts reflected to %s mode\n", | |
1187 | (dpmi_version_data.flags & 2) ? "V86" : "Real"); | |
1188 | printfi_filtered (31, "Processor type: i%d86\n", | |
1189 | dpmi_version_data.cpu); | |
1190 | printfi_filtered (31, "PIC base interrupt: Master: %#x Slave: %#x\n", | |
1191 | dpmi_version_data.master_pic, dpmi_version_data.slave_pic); | |
1192 | ||
1193 | /* a_tss is only initialized when the debuggee is first run. */ | |
1194 | if (prog_has_started) | |
1195 | { | |
1196 | __asm__ __volatile__ ("pushfl ; popl %0" : "=g" (eflags)); | |
1197 | printf_filtered ("Protection.....................Ring %d (in %s), with%s I/O protection\n", | |
1198 | a_tss.tss_cs & 3, (a_tss.tss_cs & 4) ? "LDT" : "GDT", | |
1199 | (a_tss.tss_cs & 3) > ((eflags >> 12) & 3) ? "" : "out"); | |
1200 | } | |
1201 | puts_filtered ("\n"); | |
1202 | __dpmi_get_free_memory_information (&mem_info); | |
1203 | print_mem (mem_info.total_number_of_physical_pages, | |
1204 | "DPMI Total Physical Memory.....", 1); | |
1205 | print_mem (mem_info.total_number_of_free_pages, | |
1206 | "DPMI Free Physical Memory......", 1); | |
1207 | print_mem (mem_info.size_of_paging_file_partition_in_pages, | |
1208 | "DPMI Swap Space................", 1); | |
1209 | print_mem (mem_info.linear_address_space_size_in_pages, | |
1210 | "DPMI Total Linear Address Size.", 1); | |
1211 | print_mem (mem_info.free_linear_address_space_in_pages, | |
1212 | "DPMI Free Linear Address Size..", 1); | |
1213 | print_mem (mem_info.largest_available_free_block_in_bytes, | |
1214 | "DPMI Largest Free Memory Block.", 0); | |
1215 | ||
1216 | regs.h.ah = 0x48; | |
1217 | regs.x.bx = 0xffff; | |
1218 | __dpmi_int (0x21, ®s); | |
1219 | print_mem (regs.x.bx << 4, "Free DOS Memory................", 0); | |
1220 | regs.x.ax = 0x5800; | |
1221 | __dpmi_int (0x21, ®s); | |
1222 | if ((regs.x.flags & 1) == 0) | |
1223 | { | |
1224 | static const char *dos_hilo[] = { | |
1225 | "Low", "", "", "", "High", "", "", "", "High, then Low" | |
1226 | }; | |
1227 | static const char *dos_fit[] = { | |
1228 | "First", "Best", "Last" | |
1229 | }; | |
1230 | int hilo_idx = (regs.x.ax >> 4) & 0x0f; | |
1231 | int fit_idx = regs.x.ax & 0x0f; | |
1232 | ||
1233 | if (hilo_idx > 8) | |
1234 | hilo_idx = 0; | |
1235 | if (fit_idx > 2) | |
1236 | fit_idx = 0; | |
1237 | printf_filtered ("DOS Memory Allocation..........%s memory, %s fit\n", | |
1238 | dos_hilo[hilo_idx], dos_fit[fit_idx]); | |
1239 | regs.x.ax = 0x5802; | |
1240 | __dpmi_int (0x21, ®s); | |
1241 | if ((regs.x.flags & 1) != 0) | |
1242 | regs.h.al = 0; | |
1243 | printfi_filtered (31, "UMBs %sin DOS memory chain\n", | |
1244 | regs.h.al == 0 ? "not " : ""); | |
1245 | } | |
1246 | } | |
1247 | ||
1248 | struct seg_descr { | |
1249 | unsigned short limit0 __attribute__((packed)); | |
1250 | unsigned short base0 __attribute__((packed)); | |
1251 | unsigned char base1 __attribute__((packed)); | |
1252 | unsigned stype:5 __attribute__((packed)); | |
1253 | unsigned dpl:2 __attribute__((packed)); | |
1254 | unsigned present:1 __attribute__((packed)); | |
1255 | unsigned limit1:4 __attribute__((packed)); | |
1256 | unsigned available:1 __attribute__((packed)); | |
1257 | unsigned dummy:1 __attribute__((packed)); | |
1258 | unsigned bit32:1 __attribute__((packed)); | |
1259 | unsigned page_granular:1 __attribute__((packed)); | |
1260 | unsigned char base2 __attribute__((packed)); | |
1261 | }; | |
1262 | ||
1263 | struct gate_descr { | |
1264 | unsigned short offset0 __attribute__((packed)); | |
1265 | unsigned short selector __attribute__((packed)); | |
1266 | unsigned param_count:5 __attribute__((packed)); | |
1267 | unsigned dummy:3 __attribute__((packed)); | |
1268 | unsigned stype:5 __attribute__((packed)); | |
1269 | unsigned dpl:2 __attribute__((packed)); | |
1270 | unsigned present:1 __attribute__((packed)); | |
1271 | unsigned short offset1 __attribute__((packed)); | |
1272 | }; | |
1273 | ||
1274 | /* Read LEN bytes starting at logical address ADDR, and put the result | |
1275 | into DEST. Return 1 if success, zero if not. */ | |
1276 | static int | |
1277 | read_memory_region (unsigned long addr, void *dest, size_t len) | |
1278 | { | |
1279 | unsigned long dos_ds_limit = __dpmi_get_segment_limit (_dos_ds); | |
1280 | ||
1281 | /* For the low memory, we can simply use _dos_ds. */ | |
1282 | if (addr <= dos_ds_limit - len) | |
1283 | dosmemget (addr, len, dest); | |
1284 | else | |
1285 | { | |
1286 | /* For memory above 1MB we need to set up a special segment to | |
1287 | be able to access that memory. */ | |
1288 | int sel = __dpmi_allocate_ldt_descriptors (1); | |
1289 | ||
1290 | if (sel <= 0 | |
1291 | || __dpmi_set_segment_base_address (sel, addr) == -1 | |
1292 | || __dpmi_set_segment_limit (sel, len - 1) == -1) | |
1293 | return 0; | |
1294 | movedata (sel, 0, _my_ds (), (unsigned)dest, len); | |
1295 | __dpmi_free_ldt_descriptor (sel); | |
1296 | } | |
1297 | return 1; | |
1298 | } | |
1299 | ||
1300 | /* Get a segment descriptor stored at index IDX in the descriptor | |
1301 | table whose base address is TABLE_BASE. Return the descriptor | |
1302 | type, or -1 if failure. */ | |
1303 | static int | |
1304 | get_descriptor (unsigned long table_base, int idx, void *descr) | |
1305 | { | |
1306 | unsigned long addr = table_base + idx * 8; /* 8 bytes per entry */ | |
1307 | ||
1308 | if (read_memory_region (addr, descr, 8)) | |
1309 | return (int)((struct seg_descr *)descr)->stype; | |
1310 | return -1; | |
1311 | } | |
1312 | ||
1313 | struct dtr_reg { | |
1314 | unsigned short limit __attribute__((packed)); | |
1315 | unsigned long base __attribute__((packed)); | |
1316 | }; | |
1317 | ||
1318 | /* Display a segment descriptor stored at index IDX in a descriptor | |
1319 | table whose type is TYPE and whose base address is BASE_ADDR. If | |
1320 | FORCE is non-zero, display even invalid descriptors. */ | |
1321 | static void | |
1322 | display_descriptor (unsigned type, unsigned long base_addr, int idx, int force) | |
1323 | { | |
1324 | struct seg_descr descr; | |
1325 | struct gate_descr gate; | |
1326 | ||
1327 | /* Get the descriptor from the table. */ | |
1328 | if (idx == 0 && type == 0) | |
1329 | puts_filtered ("0x000: null descriptor\n"); | |
1330 | else if (get_descriptor (base_addr, idx, &descr) != -1) | |
1331 | { | |
1332 | /* For each type of descriptor table, this has a bit set if the | |
1333 | corresponding type of selectors is valid in that table. */ | |
1334 | static unsigned allowed_descriptors[] = { | |
1335 | 0xffffdafeL, /* GDT */ | |
1336 | 0x0000c0e0L, /* IDT */ | |
1337 | 0xffffdafaL /* LDT */ | |
1338 | }; | |
1339 | ||
1340 | /* If the program hasn't started yet, assume the debuggee will | |
1341 | have the same CPL as the debugger. */ | |
1342 | int cpl = prog_has_started ? (a_tss.tss_cs & 3) : _my_cs () & 3; | |
1343 | unsigned long limit = (descr.limit1 << 16) | descr.limit0; | |
1344 | ||
1345 | if (descr.present | |
1346 | && (allowed_descriptors[type] & (1 << descr.stype)) != 0) | |
1347 | { | |
1348 | printf_filtered ("0x%03x: ", | |
1349 | type == 1 | |
1350 | ? idx : (idx * 8) | (type ? (cpl | 4) : 0)); | |
1351 | if (descr.page_granular) | |
1352 | limit = (limit << 12) | 0xfff; /* big segment: low 12 bit set */ | |
1353 | if (descr.stype == 1 || descr.stype == 2 || descr.stype == 3 | |
1354 | || descr.stype == 9 || descr.stype == 11 | |
1355 | || (descr.stype >= 16 && descr.stype < 32)) | |
1356 | printf_filtered ("base=0x%02x%02x%04x limit=0x%08lx", | |
1357 | descr.base2, descr.base1, descr.base0, limit); | |
1358 | ||
1359 | switch (descr.stype) | |
1360 | { | |
1361 | case 1: | |
1362 | case 3: | |
1363 | printf_filtered (" 16-bit TSS (task %sactive)", | |
1364 | descr.stype == 3 ? "" : "in"); | |
1365 | break; | |
1366 | case 2: | |
1367 | puts_filtered (" LDT"); | |
1368 | break; | |
1369 | case 4: | |
1370 | memcpy (&gate, &descr, sizeof gate); | |
1371 | printf_filtered ("selector=0x%04x offs=0x%04x%04x", | |
1372 | gate.selector, gate.offset1, gate.offset0); | |
1373 | printf_filtered (" 16-bit Call Gate (params=%d)", | |
1374 | gate.param_count); | |
1375 | break; | |
1376 | case 5: | |
1377 | printf_filtered ("TSS selector=0x%04x", descr.base0); | |
1378 | printfi_filtered (16, "Task Gate"); | |
1379 | break; | |
1380 | case 6: | |
1381 | case 7: | |
1382 | memcpy (&gate, &descr, sizeof gate); | |
1383 | printf_filtered ("selector=0x%04x offs=0x%04x%04x", | |
1384 | gate.selector, gate.offset1, gate.offset0); | |
1385 | printf_filtered (" 16-bit %s Gate", | |
1386 | descr.stype == 6 ? "Interrupt" : "Trap"); | |
1387 | break; | |
1388 | case 9: | |
1389 | case 11: | |
1390 | printf_filtered (" 32-bit TSS (task %sactive)", | |
1391 | descr.stype == 3 ? "" : "in"); | |
1392 | break; | |
1393 | case 12: | |
1394 | memcpy (&gate, &descr, sizeof gate); | |
1395 | printf_filtered ("selector=0x%04x offs=0x%04x%04x", | |
1396 | gate.selector, gate.offset1, gate.offset0); | |
1397 | printf_filtered (" 32-bit Call Gate (params=%d)", | |
1398 | gate.param_count); | |
1399 | break; | |
1400 | case 14: | |
1401 | case 15: | |
1402 | memcpy (&gate, &descr, sizeof gate); | |
1403 | printf_filtered ("selector=0x%04x offs=0x%04x%04x", | |
1404 | gate.selector, gate.offset1, gate.offset0); | |
1405 | printf_filtered (" 32-bit %s Gate", | |
1406 | descr.stype == 14 ? "Interrupt" : "Trap"); | |
1407 | break; | |
1408 | case 16: /* data segments */ | |
1409 | case 17: | |
1410 | case 18: | |
1411 | case 19: | |
1412 | case 20: | |
1413 | case 21: | |
1414 | case 22: | |
1415 | case 23: | |
1416 | printf_filtered (" %s-bit Data (%s Exp-%s%s)", | |
1417 | descr.bit32 ? "32" : "16", | |
1418 | descr.stype & 2 ? "Read/Write," : "Read-Only, ", | |
1419 | descr.stype & 4 ? "down" : "up", | |
1420 | descr.stype & 1 ? "" : ", N.Acc"); | |
1421 | break; | |
1422 | case 24: /* code segments */ | |
1423 | case 25: | |
1424 | case 26: | |
1425 | case 27: | |
1426 | case 28: | |
1427 | case 29: | |
1428 | case 30: | |
1429 | case 31: | |
1430 | printf_filtered (" %s-bit Code (%s, %sConf%s)", | |
1431 | descr.bit32 ? "32" : "16", | |
1432 | descr.stype & 2 ? "Exec/Read" : "Exec-Only", | |
1433 | descr.stype & 4 ? "" : "N.", | |
1434 | descr.stype & 1 ? "" : ", N.Acc"); | |
1435 | break; | |
1436 | default: | |
1437 | printf_filtered ("Unknown type 0x%02x", descr.stype); | |
1438 | break; | |
1439 | } | |
1440 | puts_filtered ("\n"); | |
1441 | } | |
1442 | else if (force) | |
1443 | { | |
1444 | printf_filtered ("0x%03x: ", | |
1445 | type == 1 | |
1446 | ? idx : (idx * 8) | (type ? (cpl | 4) : 0)); | |
1447 | if (!descr.present) | |
1448 | puts_filtered ("Segment not present\n"); | |
1449 | else | |
1450 | printf_filtered ("Segment type 0x%02x is invalid in this table\n", | |
1451 | descr.stype); | |
1452 | } | |
1453 | } | |
1454 | else if (force) | |
1455 | printf_filtered ("0x%03x: Cannot read this descriptor\n", idx); | |
1456 | } | |
1457 | ||
1458 | static void | |
1459 | go32_sldt (char *arg, int from_tty) | |
1460 | { | |
1461 | struct dtr_reg gdtr; | |
1462 | unsigned short ldtr = 0; | |
1463 | int ldt_idx; | |
1464 | struct seg_descr ldt_descr; | |
1465 | long ldt_entry = -1L; | |
1466 | int cpl = (prog_has_started ? a_tss.tss_cs : _my_cs ()) & 3; | |
1467 | ||
1468 | if (arg && *arg) | |
1469 | { | |
1470 | while (*arg && isspace(*arg)) | |
1471 | arg++; | |
1472 | ||
1473 | if (*arg) | |
1474 | { | |
1475 | ldt_entry = parse_and_eval_long (arg); | |
1476 | if (ldt_entry < 0 | |
1477 | || (ldt_entry & 4) == 0 | |
1478 | || (ldt_entry & 3) != (cpl & 3)) | |
1479 | error ("Invalid LDT entry 0x%03x.", ldt_entry); | |
1480 | } | |
1481 | } | |
1482 | ||
1483 | __asm__ __volatile__ ("sgdt %0" : "=m" (gdtr) : /* no inputs */ ); | |
1484 | __asm__ __volatile__ ("sldt %0" : "=m" (ldtr) : /* no inputs */ ); | |
1485 | ldt_idx = ldtr / 8; | |
1486 | if (ldt_idx == 0) | |
1487 | puts_filtered ("There is no LDT.\n"); | |
1488 | /* LDT's entry in the GDT must have the type LDT, which is 2. */ | |
1489 | else if (get_descriptor (gdtr.base, ldt_idx, &ldt_descr) != 2) | |
1490 | printf_filtered ("LDT is present (at %#x), but unreadable by GDB.\n", | |
1491 | ldt_descr.base0 | |
1492 | | (ldt_descr.base1 << 16) | |
1493 | | (ldt_descr.base2 << 24)); | |
1494 | else | |
1495 | { | |
1496 | unsigned base = | |
1497 | ldt_descr.base0 | |
1498 | | (ldt_descr.base1 << 16) | |
1499 | | (ldt_descr.base2 << 24); | |
1500 | unsigned limit = ldt_descr.limit0 | (ldt_descr.limit1 << 16); | |
1501 | int max_entry; | |
1502 | ||
1503 | if (ldt_descr.page_granular) | |
1504 | /* Page-granular segments must have the low 12 bits of their | |
1505 | limit set. */ | |
1506 | limit = (limit << 12) | 0xfff; | |
1507 | /* LDT cannot have more than 8K 8-byte entries, i.e. more than | |
1508 | 64KB. */ | |
1509 | if (limit > 0xffff) | |
1510 | limit = 0xffff; | |
1511 | ||
1512 | max_entry = (limit + 1) / 8; | |
1513 | ||
1514 | if (ldt_entry >= 0) | |
1515 | { | |
1516 | if (ldt_entry > limit) | |
1517 | error ("Invalid LDT entry %#x: outside valid limits [0..%#x]", | |
1518 | ldt_entry, limit); | |
1519 | ||
1520 | display_descriptor (ldt_descr.stype, base, ldt_entry / 8, 1); | |
1521 | } | |
1522 | else | |
1523 | { | |
1524 | int i; | |
1525 | ||
1526 | for (i = 0; i < max_entry; i++) | |
1527 | display_descriptor (ldt_descr.stype, base, i, 0); | |
1528 | } | |
1529 | } | |
1530 | } | |
1531 | ||
1532 | static void | |
1533 | go32_sgdt (char *arg, int from_tty) | |
1534 | { | |
1535 | struct dtr_reg gdtr; | |
1536 | long gdt_entry = -1L; | |
1537 | int max_entry; | |
1538 | ||
1539 | if (arg && *arg) | |
1540 | { | |
1541 | while (*arg && isspace(*arg)) | |
1542 | arg++; | |
1543 | ||
1544 | if (*arg) | |
1545 | { | |
1546 | gdt_entry = parse_and_eval_long (arg); | |
1547 | if (gdt_entry < 0 || (gdt_entry & 7) != 0) | |
1548 | error ("Invalid GDT entry 0x%03x: not an integral multiple of 8.", | |
1549 | gdt_entry); | |
1550 | } | |
1551 | } | |
1552 | ||
1553 | __asm__ __volatile__ ("sgdt %0" : "=m" (gdtr) : /* no inputs */ ); | |
1554 | max_entry = (gdtr.limit + 1) / 8; | |
1555 | ||
1556 | if (gdt_entry >= 0) | |
1557 | { | |
1558 | if (gdt_entry > gdtr.limit) | |
1559 | error ("Invalid GDT entry %#x: outside valid limits [0..%#x]", | |
1560 | gdt_entry, gdtr.limit); | |
1561 | ||
1562 | display_descriptor (0, gdtr.base, gdt_entry / 8, 1); | |
1563 | } | |
1564 | else | |
1565 | { | |
1566 | int i; | |
1567 | ||
1568 | for (i = 0; i < max_entry; i++) | |
1569 | display_descriptor (0, gdtr.base, i, 0); | |
1570 | } | |
1571 | } | |
1572 | ||
1573 | static void | |
1574 | go32_sidt (char *arg, int from_tty) | |
1575 | { | |
1576 | struct dtr_reg idtr; | |
1577 | long idt_entry = -1L; | |
1578 | int max_entry; | |
1579 | ||
1580 | if (arg && *arg) | |
1581 | { | |
1582 | while (*arg && isspace(*arg)) | |
1583 | arg++; | |
1584 | ||
1585 | if (*arg) | |
1586 | { | |
1587 | idt_entry = parse_and_eval_long (arg); | |
1588 | if (idt_entry < 0) | |
1589 | error ("Invalid (negative) IDT entry 0x%03x.", idt_entry); | |
1590 | } | |
1591 | } | |
1592 | ||
1593 | __asm__ __volatile__ ("sidt %0" : "=m" (idtr) : /* no inputs */ ); | |
1594 | max_entry = (idtr.limit + 1) / 8; | |
1595 | if (max_entry > 0x100) /* no more than 256 entries */ | |
1596 | max_entry = 0x100; | |
1597 | ||
1598 | if (idt_entry >= 0) | |
1599 | { | |
1600 | if (idt_entry > idtr.limit) | |
1601 | error ("Invalid IDT entry %#x: outside valid limits [0..%#x]", | |
1602 | idt_entry, idtr.limit); | |
1603 | ||
1604 | display_descriptor (1, idtr.base, idt_entry, 1); | |
1605 | } | |
1606 | else | |
1607 | { | |
1608 | int i; | |
1609 | ||
1610 | for (i = 0; i < max_entry; i++) | |
1611 | display_descriptor (1, idtr.base, i, 0); | |
1612 | } | |
1613 | } | |
1614 | ||
e49d4fa6 SS |
1615 | void |
1616 | _initialize_go32_nat (void) | |
1617 | { | |
1618 | init_go32_ops (); | |
1619 | add_target (&go32_ops); | |
10ba702d EZ |
1620 | |
1621 | add_info ("dos-sysinfo", go32_sysinfo, | |
1622 | "Display information about the target system, including CPU, OS, DPMI, etc."); | |
1623 | add_info ("dos-ldt", go32_sldt, | |
1624 | "Display entries in the LDT (Local Descriptor Table).\n" | |
1625 | "Entry number (an expression) as an argument means display only that entry."); | |
1626 | add_info ("dos-gdt", go32_sgdt, | |
1627 | "Display entries in the GDT (Global Descriptor Table).\n" | |
1628 | "Entry number (an expression) as an argument means display only that entry."); | |
1629 | add_info ("dos-idt", go32_sidt, | |
1630 | "Display entries in the IDT (Interrupt Descriptor Table).\n" | |
1631 | "Entry number (an expression) as an argument means display only that entry."); | |
e49d4fa6 | 1632 | } |
53a5351d JM |
1633 | |
1634 | pid_t | |
1635 | tcgetpgrp (int fd) | |
1636 | { | |
1637 | if (isatty (fd)) | |
1638 | return SOME_PID; | |
1639 | errno = ENOTTY; | |
1640 | return -1; | |
1641 | } | |
1642 | ||
1643 | int | |
1644 | tcsetpgrp (int fd, pid_t pgid) | |
1645 | { | |
1646 | if (isatty (fd) && pgid == SOME_PID) | |
1647 | return 0; | |
1648 | errno = pgid == SOME_PID ? ENOTTY : ENOSYS; | |
1649 | return -1; | |
1650 | } |