source: trunk/src/win32k/ldr/myldrOpen.cpp@ 3833

Last change on this file since 3833 was 2838, checked in by bird, 26 years ago

Nearly there!
File size: 18.2 KB
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1/* $Id: myldrOpen.cpp,v 1.10 2000-02-21 09:24:01 bird Exp $
2 *
3 * myldrOpen - ldrOpen.
4 *
5 * Copyright (c) 1998-1999 knut st. osmundsen
6 *
7 * Project Odin Software License can be found in LICENSE.TXT
8 *
9 */
10
11
12/*******************************************************************************
13* Defined Constants And Macros *
14*******************************************************************************/
15#define INCL_DOSERRORS
16#define INCL_NOPMAPI
17
18#define INCL_OS2KRNL_IO
19
20/*******************************************************************************
21* Header Files *
22*******************************************************************************/
23#include <os2.h>
24
25#include "rmalloc.h"
26#include "malloc.h"
27#include <memory.h>
28#include <stdlib.h>
29#include <string.h>
30
31#include "log.h"
32#include <peexe.h>
33#include <exe386.h>
34#include "OS2Krnl.h"
35#include "dev32.h"
36#include "ModuleBase.h"
37#include "pe2lx.h"
38#include "elf.h"
39#include "avl.h"
40#include "ldr.h"
41#include "ldrCalls.h"
42#include "options.h"
43#include "myExecPgm.h"
44
45/*******************************************************************************
46* Global Variables *
47*******************************************************************************/
48extern BOOL fQAppType; /* From LDRQAppType */
49
50/*******************************************************************************
51* Internal Functions *
52*******************************************************************************/
53static unsigned getArgsLength(const char *pachArgs);
54
55
56/**
57 * ldrOpen override.
58 * @returns Return code.
59 * @param phFile Pointer to file handler. Holds filehandle on output.
60 * @param pszFilename Pointer to filename.
61 * @parma param3 Probably some flags.
62 */
63ULONG LDRCALL myldrOpen(PSFN phFile, char *pszFilename, ULONG param3)
64{
65 ULONG rc;
66
67 /*
68 * Try open the file (thats why this function is called anyway)
69 */
70 rc = ldrOpen(phFile, pszFilename, param3);
71
72 /* log sucesses */
73 if (rc == NO_ERROR)
74 kprintf(("ldrOpen: phFile=%#.4x, flags=%#.8x, pszFn=%s\n", *phFile, param3, pszFilename));
75
76 /*
77 * Are we to intercept the loading?
78 * - Only if open were succesful and one of the loaders are enabled.
79 */
80 if (rc == NO_ERROR && (options.fElf || options.fPE != FLAGS_PE_NOT || options.fScript))
81 {
82 char *pszBuffer = (char*)rmalloc(640); /* Read buffer. */
83 PIMAGE_DOS_HEADER pMzHdr = (PIMAGE_DOS_HEADER)pszBuffer; /* Pointer to the buffer as it were a dosheader. */
84 PIMAGE_NT_HEADERS pNtHdrs = (PIMAGE_NT_HEADERS)pszBuffer; /* Pointer to the buffer as if it were an NT header. */
85 char *pach = pszBuffer; /* Finally an pointer to the buffer as if it were chars.. (which it is!) */
86 PEXECPGMBUFFER pBuffer; /* Pointer to a buffer containing the programname and arguments. */
87 /* For scripts and PE.EXE this has to be changed to have correct */
88 /* parameters sendt in to the program. */
89 unsigned cchRead = sizeof(IMAGE_DOS_HEADER); /* Amount of the buffer which contains valid data. */
90 unsigned cbFile; /* Filesize (0xffffffff if call to SftFileSize failed - should _never_ happen though) */
91
92 /*
93 * Verify that rmalloc completed successfully.
94 */
95 if (pszBuffer == NULL)
96 {
97 kprintf(("ldrOpen: rmalloc(1024) failed\n"));
98 return NO_ERROR;
99 }
100
101 /*
102 * Try get the filesize
103 */
104 rc = SftFileSize(*phFile, (PULONG)SSToDS(&cbFile));
105 if (rc != NO_ERROR)
106 {
107 kprintf(("ldrOpen: SftFileSize failed with rc=%d\n", rc));
108 cbFile = (unsigned)~0;
109 }
110
111 /*
112 * See if this is an recognizable module format.
113 * This costs up to two disk reads!
114 */
115 rc = ldrRead(*phFile, 0UL, pMzHdr, 0UL, cchRead, NULL);
116 if (rc == NO_ERROR)
117 {
118 /*
119 * PE header?
120 * - If DOS Magic is found AND a valid e_lfanew (offset of NE/LX/LE/PE header) is found
121 * - OR if PE siganture is found.
122 */
123 if ((pMzHdr->e_magic == IMAGE_DOS_SIGNATURE &&
124 pMzHdr->e_lfanew > sizeof(IMAGE_DOS_HEADER) && pMzHdr->e_lfanew < 0x04000000UL) /* Larger than 64 bytes and less that 64MB. */
125 || *(PULONG)pach == IMAGE_NT_SIGNATURE)
126 { /*
127 * MZ or PE header found
128 */
129
130 /* if PE loading is diable return to the caller */
131 if (options.fPE == FLAGS_PE_NOT)
132 {
133 rfree(pszBuffer);
134 return NO_ERROR;
135 }
136
137 /*
138 * Read the PE header if it isn't what we allready have!
139 */
140 cchRead = sizeof(IMAGE_NT_HEADERS);
141 if (*(PULONG)pach != IMAGE_NT_SIGNATURE)
142 rc = ldrRead(*phFile, pMzHdr->e_lfanew, pach, 0UL, cchRead, NULL);
143 else
144 rc = ldrRead(*phFile, 0UL, pach, 0UL, cchRead, NULL);
145
146 /*
147 * If successfully read, and a PE signature is present the continue and try load it!
148 * Else don't do anything, simply return NO_ERROR to the caller. (probably NE or LX exec)
149 */
150 if (rc == NO_ERROR && *(PULONG)pach == IMAGE_NT_SIGNATURE)
151 { /*
152 * PE signature found.
153 */
154 kprintf(("ldrOpen: PE executable...\n"));
155
156 /*
157 * PE2LX?
158 * - When PE2LX flag is set
159 * - OR when the MIXED flag is set and the image is with the first 64MB of memory.
160 */
161 if (options.fPE == FLAGS_PE_PE2LX
162 || (options.fPE == FLAGS_PE_MIXED
163 && !((pNtHdrs->FileHeader.Characteristics & IMAGE_FILE_DLL == 0UL)
164 && pNtHdrs->OptionalHeader.ImageBase >= 0x04000000UL /* 64MB */
165 )
166 )
167 )
168 { /*
169 * Pe2Lx (Ring0 of course)
170 * - Create a Pe2Lx class,
171 * - initiate it
172 * - Add the module to the module tree so we may find it later...
173 * - Set the handle state to 'our'.
174 */
175 Pe2Lx * pPe2Lx = new Pe2Lx(*phFile);
176 if (pPe2Lx != NULL)
177 {
178 rc = pPe2Lx->init(pszFilename);
179 if (rc == NO_ERROR)
180 {
181 kprintf(("ldrOpen: Successfully init of Pe2Lx object.\n"));
182 rc = addModule(*phFile, NULL, MOD_TYPE_PE2LX, pPe2Lx);
183 if (rc == NO_ERROR)
184 #pragma info(notrd)
185 SetState(*phFile, HSTATE_OUR);
186 #pragma info(restore)
187 else
188 kprintf(("ldrOpen: Failed to add the module. rc=%d\n"));
189 }
190 else
191 kprintf(("ldrOpen: Failed to init Pe2Lx object. rc=%d\n"));
192 if (rc != NO_ERROR)
193 delete pPe2Lx;
194 }
195 else
196 kprintf(("ldrOpen: Failed to allocate Pe2Lx object.\n"));
197 }
198 else
199 {
200 /*
201 * Starting of PE.EXE enable?
202 */
203 if (options.fPE == FLAGS_PE_PE || options.fPE == FLAGS_PE_MIXED)
204 { /*
205 * pe.exe - need the path!
206 */
207 kprintf(("ldrOpen: pe.exe - opening\n"));
208 ldrClose(*phFile);
209 rc = ldrOpen(phFile, "pe.exe", param3); /* path....! problems! */
210 kprintf(("ldrOpen: pe.exe - open returned with rc = %d\n", rc));
211 rfree(pszBuffer);
212 return rc;
213 }
214 }
215 }
216 rfree(pszBuffer);
217 return NO_ERROR;
218 }
219 else
220 {
221 /*
222 * ELF image?
223 */
224 if (pach[0] == ELFMAG0 && pach[1] == ELFMAG1 && pach[2] == ELFMAG2 && pach[3] == ELFMAG3)
225 {
226 /*
227 * ELF signature found.
228 */
229 kprintf(("ldrOpen: ELF executable! - not implemented yet!\n"));
230
231 /*
232 * Do nothing more yet. NEED AN ELF LOADER!!!
233 */
234 rfree(pszBuffer);
235 return NO_ERROR;
236 }
237 }
238 }
239
240 /*
241 * Only unreconized files and readerror passes this point!
242 *
243 * * Fileformats with lower priority should reside here. *
244 *
245 */
246
247 /*
248 * If the initial readoperation failed try to read a smaller amount, in case it is a small script...
249 * 4 bytes is a small amount isn't it?
250 */
251 if (rc != NO_ERROR)
252 {
253 kprintf(("ldrOpen: first ldrread failed with rc=%d. tries to read 4 byte.\n", rc));
254 cchRead = 4;
255 if ((rc = ldrRead(*phFile, 0UL, pach, 0UL, cchRead, NULL)) != NO_ERROR)
256 kprintf(("ldrOpen: second ldrread failed with rc=%d.\n ", rc));
257 }
258
259 /*
260 * Now we'll try again, UNIX styled script?
261 */
262 if (rc == NO_ERROR && *pach == '#' && pach[1] == '!')
263 {
264 /*
265 * UNIX styled script?
266 * FIXME! Must be more than 64 bytes long?
267 * No options!
268 * Firstline < 64 bytes!
269 */
270 kprintf(("ldrOpen: unix script?\n"));
271 cchRead = min(cbFile, 256);
272 rc = ldrRead(*phFile, 0UL, pach, 0UL, cchRead, NULL);
273 if (rc == NO_ERROR)
274 {
275 char *pszStart = pach+2;
276 kprintf(("ldrOpen: script debug 1\n"));
277
278 /* Make sure we don't read to much... */
279 pszBuffer[cchRead] = '\0';
280
281 /*
282 * Skip blanks
283 */
284 pszStart = pszBuffer + 2; /* skips the "#!" stuff. */
285 while (*pszStart != '\0' && (*pszStart == ' ' || *pszStart == '\t'))
286 pszStart++;
287 kprintf(("ldrOpen: script debug 2\n"));
288
289 /* anything left on the line? */
290 if (*pszStart != '\0' && *pszStart != '\r' && *pszStart != '\n')
291 {
292 char * pszEnd; /* Pointer to the end of the string(s) when the next step is finished. */
293 unsigned cchToAdd = 1; /* Chars to add */
294 BOOL fFirst = TRUE; /* Set if a '\0' has not been set yet.
295 * If this is clear, there are one or more parameters after the interpreter name. */
296
297 /*
298 * find linesize and make parameters ready for copying
299 */
300 pszEnd = pszStart;
301 kprintf(("ldrOpen: script debug 3\n"));
302 while (*pszEnd != '\0' && *pszEnd != '\r' && *pszEnd != '\n')
303 {
304 if (fFirst && (*pszEnd == ' ' || *pszEnd == '\t'))
305 {
306 *pszEnd = '\0';
307 fFirst = FALSE;
308 if (pszEnd[1] == '\0' || pszEnd[1] == '\r' || pszEnd[1] == '\n')
309 fFirst = TRUE;
310 }
311
312 /* next */
313 pszEnd++;
314 cchToAdd++;
315 }
316 *pszEnd = '\0';
317 kprintf(("ldrOpen: script debug 4\n"));
318
319 /*
320 * If ldrQueryApp type we don't have any ExecPgm buffer we need to mess with.
321 * We'll simply try open the the interpreter.
322 */
323 if (fQAppType)
324 {
325 rc = ldrClose(*phFile);
326 rc = ldrOpen(phFile, pszStart, param3); /* FIXME, recusion! check that name not equal! Use flags to prevent race? */
327 }
328 else
329 {
330 /*
331 * Find the ExecPgm buffer.
332 */
333 pBuffer = QueryBufferPointerFromFilename(pszFilename);
334 kprintf(("ldrOpen: script debug 5\n"));
335 if (pBuffer != NULL)
336 {
337 unsigned cchArguments = getArgsLength(pBuffer->achArgs); /* minus the first argument. */
338 unsigned cchScriptnameDelta = strlen(pBuffer->szFilename) - strlen(pBuffer->achArgs); /* scriptname size difference. */
339
340 kprintf(("ldrOpen: script debug 6\n"));
341
342 /*
343 * Is there enough space in the struct?
344 */
345 if (cchArguments + cchToAdd + cchScriptnameDelta < sizeof(pBuffer->achArgs))
346 {
347 kprintf(("ldrOpen: script debug 7\n"));
348 /*
349 * Open the interpreter.
350 */
351 rc = ldrClose(*phFile);
352 rc = ldrOpen(phFile, pszStart, param3); /* FIXME, recusion! check that name not equal! Use flags to prevent race? */
353 if (rc == NO_ERROR)
354 {
355 kprintf(("ldrOpen: script debug 8\n"));
356 /* Make space for the addition arguments. */
357 #ifdef DEBUG
358 char *psz = &pBuffer->achArgs[0];
359 int i = 0;
360 while (*psz != '\0')
361 {
362 kprintf(("Arg %d: %s\n", i++, psz));
363 psz += 1 + strlen(psz);
364 }
365 #endif
366 memmove(&pBuffer->achArgs[cchToAdd + cchScriptnameDelta],
367 &pBuffer->achArgs[0], cchArguments);
368
369 /*
370 * Copy the arguments.
371 */
372 kprintf(("ldrOpen: script debug 8\n"));
373 memcpy(&pBuffer->achArgs[0], pszStart, cchToAdd); /* Interpreter with arguments */
374 if (!fFirst)
375 pBuffer->achArgs[cchToAdd - 1] = ' ';
376 strcpy(&pBuffer->achArgs[cchToAdd], pszFilename); /* Scriptname */
377 kprintf(("ldrOpen: script debug a\n"));
378
379 #ifdef DEBUG
380 psz = &pBuffer->achArgs[0];
381 i = 0;
382 while (*psz != '\0')
383 {
384 kprintf(("Arg %d: %s\n", i++, psz));
385 psz += 1 + strlen(psz);
386 }
387 #endif
388 }
389 else
390 kprintf(("ldrOpen: failed to open interpreter (%s), rc=%d\n", pszStart, rc));
391 }
392 else
393 {
394 kprintf(("ldrOpen: Argument buffer too small, %d\n", cchArguments + cchToAdd));
395 rc = ERROR_BAD_EXE_FORMAT;
396 }
397 }
398 else
399 {
400 kprintf(("ldrOpen: QueryBufferPointerFromFilename failed.\n"));
401 rc = ERROR_BAD_EXE_FORMAT; /*?*/
402 }
403 }
404 }
405 else
406 {
407 kprintf(("ldrOpen: no interpereter on the first line.\n"));
408 rc = ERROR_BAD_EXE_FORMAT; /*?*/
409 }
410 }
411 else
412 {
413 kprintf(("ldrOpen: read of min(cbFile, 256) = %d failed, rc = %d\n", cchRead, rc));
414 }
415 } /* else inn other formats here. */
416 rfree(pszBuffer);
417 }
418 return rc;
419}
420
421
422/**
423 * Get the lenght of the arguments.
424 * @returns Lenght in char, includes the two '\0's.
425 * @param pachArgs Pointer to the ASCIIZs which makes up the arguments.
426 * @status completely implemented.
427 * @author knut st. osmundsen (knut.stange.osmundsen@pmsc.no)
428 */
429static unsigned getArgsLength(const char *pachArgs)
430{
431 unsigned cch = 1;
432 const char *psz = pachArgs;
433
434 while (*psz != '\0')
435 {
436 register unsigned cch2 = strlen(psz);
437 cch += cch2;
438 psz += cch2 + 1;
439 }
440
441 return cch;
442}
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