2 * Debugger memory handling
4 * Copyright 1993 Eric Youngdale
5 * Copyright 1995 Alexandre Julliard
10 #include "wine/winbase16.h"
15 /************************************************************
17 * Check if linear pointer in [addr, addr+size[
21 ************************************************************/
23 #if defined(linux) || defined(__FreeBSD__) || defined(__OpenBSD__)
24 BOOL32
DEBUG_checkmap_bad( const char *addr
, size_t size
, int rwflag
)
27 char buf
[80]; /* temporary line buffer */
28 char prot
[5]; /* protection string */
34 The entries in /proc/self/maps are of the form:
35 08000000-08002000 r-xp 00000000 03:41 2361
36 08002000-08003000 rw-p 00001000 03:41 2361
37 08003000-08005000 rwxp 00000000 00:00 0
38 40000000-40005000 r-xp 00000000 03:41 67219
39 40005000-40006000 rw-p 00004000 03:41 67219
40 40006000-40007000 rw-p 00000000 00:00 0
42 start end perm ??? major:minor inode
44 Only permissions start and end are used here
48 % cat /proc/curproc/map
49 start end resident private perm type
50 0x1000 0xe000 12 0 r-x COW vnode
51 0xe000 0x10000 2 2 rwx COW vnode
52 0x10000 0x27000 4 4 rwx default
53 0x800e000 0x800f000 1 1 rw- default
54 0xefbde000 0xefbfe000 1 1 rwx default
62 if (!(fp
= fopen("/proc/self/maps", "r")))
64 if (!(fp
= fopen("/proc/curproc/map", "r")))
68 while (fgets( buf
, 79, fp
)) {
70 sscanf(buf
, "%x-%x %3s", (int *) &start
, (int *) &end
, prot
);
72 sscanf(buf
, "%x %x %*d %*d %3s", (int *) &start
, (int *) &end
, prot
);
76 if (start
<= addr
&& addr
+size
< end
) {
78 ret
= (prot
[0] != 'r'); /* test for reading */
80 ret
= (prot
[1] != 'w'); /* test for writing */
87 #else /* linux || FreeBSD */
88 /* FIXME: code needed for BSD et al. */
89 BOOL32
DEBUG_checkmap_bad(char *addr
, size_t size
, int rwflag
)
93 #endif /* linux || FreeBSD */
96 /***********************************************************************
99 * Check if we are allowed to read memory at 'address'.
101 BOOL32
DEBUG_IsBadReadPtr( const DBG_ADDR
*address
, int size
)
103 if (!IS_SELECTOR_V86(address
->seg
))
104 if (address
->seg
) /* segmented addr */
106 if (IsBadReadPtr16( (SEGPTR
)MAKELONG( (WORD
)address
->off
,
107 (WORD
)address
->seg
), size
))
110 return DEBUG_checkmap_bad( DBG_ADDR_TO_LIN(address
), size
, 1);
114 /***********************************************************************
115 * DEBUG_IsBadWritePtr
117 * Check if we are allowed to write memory at 'address'.
119 BOOL32
DEBUG_IsBadWritePtr( const DBG_ADDR
*address
, int size
)
121 if (!IS_SELECTOR_V86(address
->seg
))
122 if (address
->seg
) /* segmented addr */
124 /* Note: we use IsBadReadPtr here because we are */
125 /* always allowed to write to read-only segments */
126 if (IsBadReadPtr16( (SEGPTR
)MAKELONG( (WORD
)address
->off
,
127 (WORD
)address
->seg
), size
))
130 return DEBUG_checkmap_bad( DBG_ADDR_TO_LIN(address
), size
, 0);
134 /***********************************************************************
137 * Read a memory value.
139 int DEBUG_ReadMemory( const DBG_ADDR
*address
)
141 DBG_ADDR addr
= *address
;
143 DBG_FIX_ADDR_SEG( &addr
, DS_reg(&DEBUG_context
) );
144 if (!DBG_CHECK_READ_PTR( &addr
, sizeof(int) )) return 0;
145 return *(int *)DBG_ADDR_TO_LIN( &addr
);
149 /***********************************************************************
152 * Store a value in memory.
154 void DEBUG_WriteMemory( const DBG_ADDR
*address
, int value
)
156 DBG_ADDR addr
= *address
;
158 DBG_FIX_ADDR_SEG( &addr
, DS_reg(&DEBUG_context
) );
159 if (!DBG_CHECK_WRITE_PTR( &addr
, sizeof(int) )) return;
160 *(int *)DBG_ADDR_TO_LIN( &addr
) = value
;
164 /***********************************************************************
165 * DEBUG_ExamineMemory
167 * Implementation of the 'x' command.
169 void DEBUG_ExamineMemory( const DBG_ADDR
*address
, int count
, char format
)
171 DBG_ADDR addr
= * address
;
176 struct datatype
* testtype
;
177 unsigned short int * wdump
;
179 DBG_FIX_ADDR_SEG( &addr
, (format
== 'i') ?
180 CS_reg(&DEBUG_context
) : DS_reg(&DEBUG_context
) );
183 * Dereference pointer to get actual memory address we need to be
184 * reading. We will use the same segment as what we have already,
185 * and hope that this is a sensible thing to do.
187 if( addr
.type
!= NULL
)
189 if( addr
.type
== DEBUG_TypeIntConst
)
192 * We know that we have the actual offset stored somewhere
193 * else in 32-bit space. Grab it, and we
198 addr
.off
= DEBUG_GetExprValue(&addr
, NULL
);
203 if (!DBG_CHECK_READ_PTR( &addr
, 1 )) return;
204 DEBUG_TypeDerefPointer(&addr
, &testtype
);
205 if( testtype
!= NULL
|| addr
.type
== DEBUG_TypeIntConst
)
207 addr
.off
= DEBUG_GetExprValue(&addr
, NULL
);
211 else if (!addr
.seg
&& !addr
.off
)
213 fprintf(stderr
,"Invalid expression\n");
217 if (format
!= 'i' && count
> 1)
219 DEBUG_PrintAddress( &addr
, dbg_mode
, FALSE
);
220 fprintf(stderr
,": ");
223 pnt
= DBG_ADDR_TO_LIN( &addr
);
228 WCHAR
*ptr
= (WCHAR
*)pnt
;
229 if (count
== 1) count
= 256;
232 if (!DBG_CHECK_READ_PTR( &addr
, sizeof(WCHAR
) )) return;
235 fputc( (char)*ptr
++, stderr
);
237 fprintf(stderr
,"\n");
241 if (count
== 1) count
= 256;
244 if (!DBG_CHECK_READ_PTR( &addr
, sizeof(char) )) return;
247 fputc( *pnt
++, stderr
);
249 fprintf(stderr
,"\n");
255 DEBUG_PrintAddress( &addr
, dbg_mode
, TRUE
);
256 fprintf(stderr
,": ");
257 if (!DBG_CHECK_READ_PTR( &addr
, 1 )) return;
258 DEBUG_Disasm( &addr
, TRUE
);
259 fprintf(stderr
,"\n");
263 dump
= (unsigned int *)pnt
;
264 for(i
=0; i
<count
; i
++)
266 if (!DBG_CHECK_READ_PTR( &addr
, sizeof(int) )) return;
267 fprintf(stderr
," %8.8x", *dump
++);
268 addr
.off
+= sizeof(int);
271 fprintf(stderr
,"\n");
272 DEBUG_PrintAddress( &addr
, dbg_mode
, FALSE
);
273 fprintf(stderr
,": ");
276 fprintf(stderr
,"\n");
280 dump
= (unsigned int *)pnt
;
281 for(i
=0; i
<count
; i
++)
283 if (!DBG_CHECK_READ_PTR( &addr
, sizeof(int) )) return;
284 fprintf(stderr
," %d", *dump
++);
285 addr
.off
+= sizeof(int);
288 fprintf(stderr
,"\n");
289 DEBUG_PrintAddress( &addr
, dbg_mode
, FALSE
);
290 fprintf(stderr
,": ");
293 fprintf(stderr
,"\n");
297 wdump
= (unsigned short *)pnt
;
298 for(i
=0; i
<count
; i
++)
300 if (!DBG_CHECK_READ_PTR( &addr
, sizeof(short) )) return;
301 fprintf(stderr
," %04x", *wdump
++);
302 addr
.off
+= sizeof(short);
305 fprintf(stderr
,"\n");
306 DEBUG_PrintAddress( &addr
, dbg_mode
, FALSE
);
307 fprintf(stderr
,": ");
310 fprintf(stderr
,"\n");
314 for(i
=0; i
<count
; i
++)
316 if (!DBG_CHECK_READ_PTR( &addr
, sizeof(char) )) return;
322 else fprintf(stderr
," %c", *pnt
++);
326 fprintf(stderr
,"\n");
327 DEBUG_PrintAddress( &addr
, dbg_mode
, FALSE
);
328 fprintf(stderr
,": ");
331 fprintf(stderr
,"\n");
335 for(i
=0; i
<count
; i
++)
337 if (!DBG_CHECK_READ_PTR( &addr
, sizeof(char) )) return;
338 fprintf(stderr
," %02x", (*pnt
++) & 0xff);
342 fprintf(stderr
,"\n");
343 DEBUG_PrintAddress( &addr
, dbg_mode
, FALSE
);
344 fprintf(stderr
,": ");
347 fprintf(stderr
,"\n");