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BaseTools/GenFw: Enhance GenFw to support PRM GCC build
[mirror_edk2.git] / BaseTools / Source / C / GenFw / Elf64Convert.c
1 /** @file
2 Elf64 convert solution
3
4 Copyright (c) 2010 - 2021, Intel Corporation. All rights reserved.<BR>
5 Portions copyright (c) 2013-2014, ARM Ltd. All rights reserved.<BR>
6 Portions Copyright (c) 2020, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
7
8 SPDX-License-Identifier: BSD-2-Clause-Patent
9
10 **/
11
12 #include "WinNtInclude.h"
13
14 #ifndef __GNUC__
15 #include <windows.h>
16 #include <io.h>
17 #endif
18 #include <assert.h>
19 #include <stdio.h>
20 #include <stdlib.h>
21 #include <string.h>
22 #include <time.h>
23 #include <ctype.h>
24
25 #include <Common/UefiBaseTypes.h>
26 #include <IndustryStandard/PeImage.h>
27
28 #include "PeCoffLib.h"
29 #include "EfiUtilityMsgs.h"
30
31 #include "GenFw.h"
32 #include "ElfConvert.h"
33 #include "Elf64Convert.h"
34
35 STATIC
36 VOID
37 ScanSections64 (
38 VOID
39 );
40
41 STATIC
42 BOOLEAN
43 WriteSections64 (
44 SECTION_FILTER_TYPES FilterType
45 );
46
47 STATIC
48 VOID
49 WriteRelocations64 (
50 VOID
51 );
52
53 STATIC
54 VOID
55 WriteDebug64 (
56 VOID
57 );
58
59 STATIC
60 VOID
61 WriteExport64 (
62 VOID
63 );
64
65 STATIC
66 VOID
67 SetImageSize64 (
68 VOID
69 );
70
71 STATIC
72 VOID
73 CleanUp64 (
74 VOID
75 );
76
77 //
78 // Rename ELF32 structures to common names to help when porting to ELF64.
79 //
80 typedef Elf64_Shdr Elf_Shdr;
81 typedef Elf64_Ehdr Elf_Ehdr;
82 typedef Elf64_Rel Elf_Rel;
83 typedef Elf64_Rela Elf_Rela;
84 typedef Elf64_Sym Elf_Sym;
85 typedef Elf64_Phdr Elf_Phdr;
86 typedef Elf64_Dyn Elf_Dyn;
87 #define ELFCLASS ELFCLASS64
88 #define ELF_R_TYPE(r) ELF64_R_TYPE(r)
89 #define ELF_R_SYM(r) ELF64_R_SYM(r)
90
91 //
92 // Well known ELF structures.
93 //
94 STATIC Elf_Ehdr *mEhdr;
95 STATIC Elf_Shdr *mShdrBase;
96 STATIC Elf_Phdr *mPhdrBase;
97
98 //
99 // GOT information
100 //
101 STATIC Elf_Shdr *mGOTShdr = NULL;
102 STATIC UINT32 mGOTShindex = 0;
103 STATIC UINT32 *mGOTCoffEntries = NULL;
104 STATIC UINT32 mGOTMaxCoffEntries = 0;
105 STATIC UINT32 mGOTNumCoffEntries = 0;
106
107 //
108 // Coff information
109 //
110 STATIC UINT32 mCoffAlignment = 0x20;
111
112 //
113 // PE section alignment.
114 //
115 STATIC UINT16 mCoffNbrSections = 4;
116
117 //
118 // ELF sections to offset in Coff file.
119 //
120 STATIC UINT32 *mCoffSectionsOffset = NULL;
121
122 //
123 // Offsets in COFF file
124 //
125 STATIC UINT32 mNtHdrOffset;
126 STATIC UINT32 mTextOffset;
127 STATIC UINT32 mDataOffset;
128 STATIC UINT32 mHiiRsrcOffset;
129 STATIC UINT32 mRelocOffset;
130 STATIC UINT32 mDebugOffset;
131 STATIC UINT32 mExportOffset;
132 //
133 // Used for RISC-V relocations.
134 //
135 STATIC UINT8 *mRiscVPass1Targ = NULL;
136 STATIC Elf_Shdr *mRiscVPass1Sym = NULL;
137 STATIC Elf64_Half mRiscVPass1SymSecIndex = 0;
138 STATIC INT32 mRiscVPass1Offset;
139 STATIC INT32 mRiscVPass1GotFixup;
140
141 //
142 // Used for Export section.
143 //
144 STATIC UINT32 mExportSize;
145 STATIC UINT32 mExportRVA[PRM_MODULE_EXPORT_SYMBOL_NUM];
146 STATIC UINT32 mExportSymNum;
147 STATIC CHAR8 mExportSymName[PRM_MODULE_EXPORT_SYMBOL_NUM][PRM_HANDLER_NAME_MAXIMUM_LENGTH];
148
149 //
150 // Initialization Function
151 //
152 BOOLEAN
153 InitializeElf64 (
154 UINT8 *FileBuffer,
155 ELF_FUNCTION_TABLE *ElfFunctions
156 )
157 {
158 //
159 // Initialize data pointer and structures.
160 //
161 VerboseMsg ("Set EHDR");
162 mEhdr = (Elf_Ehdr*) FileBuffer;
163
164 //
165 // Check the ELF64 specific header information.
166 //
167 VerboseMsg ("Check ELF64 Header Information");
168 if (mEhdr->e_ident[EI_CLASS] != ELFCLASS64) {
169 Error (NULL, 0, 3000, "Unsupported", "ELF EI_DATA not ELFCLASS64");
170 return FALSE;
171 }
172 if (mEhdr->e_ident[EI_DATA] != ELFDATA2LSB) {
173 Error (NULL, 0, 3000, "Unsupported", "ELF EI_DATA not ELFDATA2LSB");
174 return FALSE;
175 }
176 if ((mEhdr->e_type != ET_EXEC) && (mEhdr->e_type != ET_DYN)) {
177 Error (NULL, 0, 3000, "Unsupported", "ELF e_type not ET_EXEC or ET_DYN");
178 return FALSE;
179 }
180 if (!((mEhdr->e_machine == EM_X86_64) || (mEhdr->e_machine == EM_AARCH64) || (mEhdr->e_machine == EM_RISCV64))) {
181 Warning (NULL, 0, 3000, "Unsupported", "ELF e_machine is not Elf64 machine.");
182 }
183 if (mEhdr->e_version != EV_CURRENT) {
184 Error (NULL, 0, 3000, "Unsupported", "ELF e_version (%u) not EV_CURRENT (%d)", (unsigned) mEhdr->e_version, EV_CURRENT);
185 return FALSE;
186 }
187
188 if (mExportFlag) {
189 if (mEhdr->e_machine != EM_X86_64) {
190 Error (NULL, 0, 3000, "Unsupported", "--prm option currently only supports X64 arch.");
191 return FALSE;
192 }
193 }
194
195 //
196 // Update section header pointers
197 //
198 VerboseMsg ("Update Header Pointers");
199 mShdrBase = (Elf_Shdr *)((UINT8 *)mEhdr + mEhdr->e_shoff);
200 mPhdrBase = (Elf_Phdr *)((UINT8 *)mEhdr + mEhdr->e_phoff);
201
202 //
203 // Create COFF Section offset buffer and zero.
204 //
205 VerboseMsg ("Create COFF Section Offset Buffer");
206 mCoffSectionsOffset = (UINT32 *)malloc(mEhdr->e_shnum * sizeof (UINT32));
207 if (mCoffSectionsOffset == NULL) {
208 Error (NULL, 0, 4001, "Resource", "memory cannot be allocated!");
209 return FALSE;
210 }
211 memset(mCoffSectionsOffset, 0, mEhdr->e_shnum * sizeof(UINT32));
212
213 //
214 // Fill in function pointers.
215 //
216 VerboseMsg ("Fill in Function Pointers");
217 ElfFunctions->ScanSections = ScanSections64;
218 ElfFunctions->WriteSections = WriteSections64;
219 ElfFunctions->WriteRelocations = WriteRelocations64;
220 ElfFunctions->WriteDebug = WriteDebug64;
221 ElfFunctions->SetImageSize = SetImageSize64;
222 ElfFunctions->CleanUp = CleanUp64;
223
224 if (mExportFlag) {
225 mCoffNbrSections ++;
226 ElfFunctions->WriteExport = WriteExport64;
227 }
228
229 return TRUE;
230 }
231
232
233 //
234 // Header by Index functions
235 //
236 STATIC
237 Elf_Shdr*
238 GetShdrByIndex (
239 UINT32 Num
240 )
241 {
242 if (Num >= mEhdr->e_shnum) {
243 Error (NULL, 0, 3000, "Invalid", "GetShdrByIndex: Index %u is too high.", Num);
244 exit(EXIT_FAILURE);
245 }
246
247 return (Elf_Shdr*)((UINT8*)mShdrBase + Num * mEhdr->e_shentsize);
248 }
249
250 STATIC
251 UINT32
252 CoffAlign (
253 UINT32 Offset
254 )
255 {
256 return (Offset + mCoffAlignment - 1) & ~(mCoffAlignment - 1);
257 }
258
259 STATIC
260 UINT32
261 DebugRvaAlign (
262 UINT32 Offset
263 )
264 {
265 return (Offset + 3) & ~3;
266 }
267
268 //
269 // filter functions
270 //
271 STATIC
272 BOOLEAN
273 IsTextShdr (
274 Elf_Shdr *Shdr
275 )
276 {
277 return (BOOLEAN) (((Shdr->sh_flags & (SHF_EXECINSTR | SHF_ALLOC)) == (SHF_EXECINSTR | SHF_ALLOC)) ||
278 ((Shdr->sh_flags & (SHF_WRITE | SHF_ALLOC)) == SHF_ALLOC));
279 }
280
281 STATIC
282 BOOLEAN
283 IsHiiRsrcShdr (
284 Elf_Shdr *Shdr
285 )
286 {
287 Elf_Shdr *Namedr = GetShdrByIndex(mEhdr->e_shstrndx);
288
289 return (BOOLEAN) (strcmp((CHAR8*)mEhdr + Namedr->sh_offset + Shdr->sh_name, ELF_HII_SECTION_NAME) == 0);
290 }
291
292 STATIC
293 BOOLEAN
294 IsSymbolShdr (
295 Elf_Shdr *Shdr
296 )
297 {
298 Elf_Shdr *Namehdr = GetShdrByIndex(mEhdr->e_shstrndx);
299
300 return (BOOLEAN) (strcmp((CHAR8*)mEhdr + Namehdr->sh_offset + Shdr->sh_name, ELF_SYMBOL_SECTION_NAME) == 0);
301 }
302
303 STATIC
304 BOOLEAN
305 IsDataShdr (
306 Elf_Shdr *Shdr
307 )
308 {
309 if (IsHiiRsrcShdr(Shdr)) {
310 return FALSE;
311 }
312 return (BOOLEAN) (Shdr->sh_flags & (SHF_EXECINSTR | SHF_WRITE | SHF_ALLOC)) == (SHF_ALLOC | SHF_WRITE);
313 }
314
315 STATIC
316 BOOLEAN
317 IsStrtabShdr (
318 Elf_Shdr *Shdr
319 )
320 {
321 Elf_Shdr *Namedr = GetShdrByIndex(mEhdr->e_shstrndx);
322
323 return (BOOLEAN) (strcmp((CHAR8*)mEhdr + Namedr->sh_offset + Shdr->sh_name, ELF_STRTAB_SECTION_NAME) == 0);
324 }
325
326 STATIC
327 Elf_Shdr *
328 FindStrtabShdr (
329 VOID
330 )
331 {
332 UINT32 i;
333 for (i = 0; i < mEhdr->e_shnum; i++) {
334 Elf_Shdr *shdr = GetShdrByIndex(i);
335 if (IsStrtabShdr(shdr)) {
336 return shdr;
337 }
338 }
339 return NULL;
340 }
341
342 STATIC
343 const UINT8 *
344 GetSymName (
345 Elf_Sym *Sym
346 )
347 {
348 Elf_Shdr *StrtabShdr;
349 UINT8 *StrtabContents;
350 BOOLEAN foundEnd;
351 UINT32 i;
352
353 if (Sym->st_name == 0) {
354 return NULL;
355 }
356
357 StrtabShdr = FindStrtabShdr();
358 if (StrtabShdr == NULL) {
359 return NULL;
360 }
361
362 assert(Sym->st_name < StrtabShdr->sh_size);
363
364 StrtabContents = (UINT8*)mEhdr + StrtabShdr->sh_offset;
365
366 foundEnd = FALSE;
367 for (i= Sym->st_name; (i < StrtabShdr->sh_size) && !foundEnd; i++) {
368 foundEnd = (BOOLEAN)(StrtabContents[i] == 0);
369 }
370 assert(foundEnd);
371
372 return StrtabContents + Sym->st_name;
373 }
374
375 //
376 // Get Prm Handler number and name
377 //
378 STATIC
379 VOID
380 FindPrmHandler (
381 UINT64 Offset
382 )
383 {
384 PRM_MODULE_EXPORT_DESCRIPTOR_STRUCT_HEADER *PrmExport;
385 PRM_HANDLER_EXPORT_DESCRIPTOR_STRUCT *PrmHandler;
386 UINT32 HandlerNum;
387
388 PrmExport = (PRM_MODULE_EXPORT_DESCRIPTOR_STRUCT_HEADER*)((UINT8*)mEhdr + Offset);
389 PrmHandler = (PRM_HANDLER_EXPORT_DESCRIPTOR_STRUCT *)(PrmExport + 1);
390
391 for (HandlerNum = 0; HandlerNum < PrmExport->NumberPrmHandlers; HandlerNum++) {
392 strcpy(mExportSymName[mExportSymNum], PrmHandler->PrmHandlerName);
393 mExportSymNum ++;
394 PrmHandler += 1;
395
396 //
397 // Check if PRM handler number is larger than (PRM_MODULE_EXPORT_SYMBOL_NUM - 1)
398 //
399 if (mExportSymNum >= (PRM_MODULE_EXPORT_SYMBOL_NUM - 1)) {
400 Error (NULL, 0, 3000, "Invalid", "FindPrmHandler: Number %u is too high.", mExportSymNum);
401 exit(EXIT_FAILURE);
402 }
403 }
404 }
405
406 //
407 // Find the ELF section hosting the GOT from an ELF Rva
408 // of a single GOT entry. Normally, GOT is placed in
409 // ELF .text section, so assume once we find in which
410 // section the GOT is, all GOT entries are there, and
411 // just verify this.
412 //
413 STATIC
414 VOID
415 FindElfGOTSectionFromGOTEntryElfRva (
416 Elf64_Addr GOTEntryElfRva
417 )
418 {
419 UINT32 i;
420 if (mGOTShdr != NULL) {
421 if (GOTEntryElfRva >= mGOTShdr->sh_addr &&
422 GOTEntryElfRva < mGOTShdr->sh_addr + mGOTShdr->sh_size) {
423 return;
424 }
425 Error (NULL, 0, 3000, "Unsupported", "FindElfGOTSectionFromGOTEntryElfRva: GOT entries found in multiple sections.");
426 exit(EXIT_FAILURE);
427 }
428 for (i = 0; i < mEhdr->e_shnum; i++) {
429 Elf_Shdr *shdr = GetShdrByIndex(i);
430 if (GOTEntryElfRva >= shdr->sh_addr &&
431 GOTEntryElfRva < shdr->sh_addr + shdr->sh_size) {
432 mGOTShdr = shdr;
433 mGOTShindex = i;
434 return;
435 }
436 }
437 Error (NULL, 0, 3000, "Invalid", "FindElfGOTSectionFromGOTEntryElfRva: ElfRva 0x%016LX for GOT entry not found in any section.", GOTEntryElfRva);
438 exit(EXIT_FAILURE);
439 }
440
441 //
442 // Stores locations of GOT entries in COFF image.
443 // Returns TRUE if GOT entry is new.
444 // Simple implementation as number of GOT
445 // entries is expected to be low.
446 //
447
448 STATIC
449 BOOLEAN
450 AccumulateCoffGOTEntries (
451 UINT32 GOTCoffEntry
452 )
453 {
454 UINT32 i;
455 if (mGOTCoffEntries != NULL) {
456 for (i = 0; i < mGOTNumCoffEntries; i++) {
457 if (mGOTCoffEntries[i] == GOTCoffEntry) {
458 return FALSE;
459 }
460 }
461 }
462 if (mGOTCoffEntries == NULL) {
463 mGOTCoffEntries = (UINT32*)malloc(5 * sizeof *mGOTCoffEntries);
464 if (mGOTCoffEntries == NULL) {
465 Error (NULL, 0, 4001, "Resource", "memory cannot be allocated!");
466 }
467 assert (mGOTCoffEntries != NULL);
468 mGOTMaxCoffEntries = 5;
469 mGOTNumCoffEntries = 0;
470 } else if (mGOTNumCoffEntries == mGOTMaxCoffEntries) {
471 mGOTCoffEntries = (UINT32*)realloc(mGOTCoffEntries, 2 * mGOTMaxCoffEntries * sizeof *mGOTCoffEntries);
472 if (mGOTCoffEntries == NULL) {
473 Error (NULL, 0, 4001, "Resource", "memory cannot be allocated!");
474 }
475 assert (mGOTCoffEntries != NULL);
476 mGOTMaxCoffEntries += mGOTMaxCoffEntries;
477 }
478 mGOTCoffEntries[mGOTNumCoffEntries++] = GOTCoffEntry;
479 return TRUE;
480 }
481
482 //
483 // 32-bit Unsigned integer comparator for qsort.
484 //
485 STATIC
486 int
487 UINT32Comparator (
488 const void* lhs,
489 const void* rhs
490 )
491 {
492 if (*(const UINT32*)lhs < *(const UINT32*)rhs) {
493 return -1;
494 }
495 return *(const UINT32*)lhs > *(const UINT32*)rhs;
496 }
497
498 //
499 // Emit accumulated Coff GOT entry relocations into
500 // Coff image. This function performs its job
501 // once and then releases the entry list, so
502 // it can safely be called multiple times.
503 //
504 STATIC
505 VOID
506 EmitGOTRelocations (
507 VOID
508 )
509 {
510 UINT32 i;
511 if (mGOTCoffEntries == NULL) {
512 return;
513 }
514 //
515 // Emit Coff relocations with Rvas ordered.
516 //
517 qsort(
518 mGOTCoffEntries,
519 mGOTNumCoffEntries,
520 sizeof *mGOTCoffEntries,
521 UINT32Comparator);
522 for (i = 0; i < mGOTNumCoffEntries; i++) {
523 VerboseMsg ("EFI_IMAGE_REL_BASED_DIR64 Offset: 0x%08X", mGOTCoffEntries[i]);
524 CoffAddFixup(
525 mGOTCoffEntries[i],
526 EFI_IMAGE_REL_BASED_DIR64);
527 }
528 free(mGOTCoffEntries);
529 mGOTCoffEntries = NULL;
530 mGOTMaxCoffEntries = 0;
531 mGOTNumCoffEntries = 0;
532 }
533 //
534 // RISC-V 64 specific Elf WriteSection function.
535 //
536 STATIC
537 VOID
538 WriteSectionRiscV64 (
539 Elf_Rela *Rel,
540 UINT8 *Targ,
541 Elf_Shdr *SymShdr,
542 Elf_Sym *Sym
543 )
544 {
545 UINT32 Value;
546 UINT32 Value2;
547 Elf64_Addr GOTEntryRva;
548
549 switch (ELF_R_TYPE(Rel->r_info)) {
550 case R_RISCV_NONE:
551 break;
552
553 case R_RISCV_32:
554 *(UINT64 *)Targ = Sym->st_value + Rel->r_addend;
555 break;
556
557 case R_RISCV_64:
558 *(UINT64 *)Targ = Sym->st_value + Rel->r_addend;
559 break;
560
561 case R_RISCV_HI20:
562 mRiscVPass1Targ = Targ;
563 mRiscVPass1Sym = SymShdr;
564 mRiscVPass1SymSecIndex = Sym->st_shndx;
565 break;
566
567 case R_RISCV_LO12_I:
568 if (mRiscVPass1Sym == SymShdr && mRiscVPass1Targ != NULL && mRiscVPass1SymSecIndex == Sym->st_shndx && mRiscVPass1SymSecIndex != 0) {
569 Value = (UINT32)(RV_X(*(UINT32 *)mRiscVPass1Targ, 12, 20) << 12);
570 Value2 = (UINT32)(RV_X(*(UINT32 *)Targ, 20, 12));
571 if (Value2 & (RISCV_IMM_REACH/2)) {
572 Value2 |= ~(RISCV_IMM_REACH-1);
573 }
574 Value += Value2;
575 Value = Value - (UINT32)SymShdr->sh_addr + mCoffSectionsOffset[Sym->st_shndx];
576 Value2 = RISCV_CONST_HIGH_PART (Value);
577 *(UINT32 *)mRiscVPass1Targ = (RV_X (Value2, 12, 20) << 12) | \
578 (RV_X (*(UINT32 *)mRiscVPass1Targ, 0, 12));
579 *(UINT32 *)Targ = (RV_X (Value, 0, 12) << 20) | \
580 (RV_X (*(UINT32 *)Targ, 0, 20));
581 }
582 mRiscVPass1Sym = NULL;
583 mRiscVPass1Targ = NULL;
584 mRiscVPass1SymSecIndex = 0;
585 break;
586
587 case R_RISCV_LO12_S:
588 if (mRiscVPass1Sym == SymShdr && mRiscVPass1Targ != NULL && mRiscVPass1SymSecIndex == Sym->st_shndx && mRiscVPass1SymSecIndex != 0) {
589 Value = (UINT32)(RV_X(*(UINT32 *)mRiscVPass1Targ, 12, 20) << 12);
590 Value2 = (UINT32)(RV_X(*(UINT32 *)Targ, 7, 5) | (RV_X(*(UINT32 *)Targ, 25, 7) << 5));
591 if (Value2 & (RISCV_IMM_REACH/2)) {
592 Value2 |= ~(RISCV_IMM_REACH-1);
593 }
594 Value += Value2;
595 Value = Value - (UINT32)SymShdr->sh_addr + mCoffSectionsOffset[Sym->st_shndx];
596 Value2 = RISCV_CONST_HIGH_PART (Value);
597 *(UINT32 *)mRiscVPass1Targ = (RV_X (Value2, 12, 20) << 12) | \
598 (RV_X (*(UINT32 *)mRiscVPass1Targ, 0, 12));
599 Value2 = *(UINT32 *)Targ & 0x01fff07f;
600 Value &= RISCV_IMM_REACH - 1;
601 *(UINT32 *)Targ = Value2 | (UINT32)(((RV_X(Value, 0, 5) << 7) | (RV_X(Value, 5, 7) << 25)));
602 }
603 mRiscVPass1Sym = NULL;
604 mRiscVPass1Targ = NULL;
605 mRiscVPass1SymSecIndex = 0;
606 break;
607
608 case R_RISCV_GOT_HI20:
609 GOTEntryRva = (Sym->st_value - Rel->r_offset);
610 mRiscVPass1Offset = RV_X(GOTEntryRva, 0, 12);
611 Value = (UINT32)RV_X(GOTEntryRva, 12, 20);
612 *(UINT32 *)Targ = (Value << 12) | (RV_X(*(UINT32*)Targ, 0, 12));
613
614 mRiscVPass1Targ = Targ;
615 mRiscVPass1Sym = SymShdr;
616 mRiscVPass1SymSecIndex = Sym->st_shndx;
617 mRiscVPass1GotFixup = 1;
618 break;
619
620 case R_RISCV_PCREL_HI20:
621 mRiscVPass1Targ = Targ;
622 mRiscVPass1Sym = SymShdr;
623 mRiscVPass1SymSecIndex = Sym->st_shndx;
624
625 Value = (UINT32)(RV_X(*(UINT32 *)mRiscVPass1Targ, 12, 20));
626 break;
627
628 case R_RISCV_PCREL_LO12_S:
629 if (mRiscVPass1Targ != NULL && mRiscVPass1Sym != NULL && mRiscVPass1SymSecIndex != 0) {
630 int i;
631 Value2 = (UINT32)(RV_X(*(UINT32 *)mRiscVPass1Targ, 12, 20));
632
633 Value = ((UINT32)(RV_X(*(UINT32 *)Targ, 25, 7)) << 5);
634 Value = (Value | (UINT32)(RV_X(*(UINT32 *)Targ, 7, 5)));
635
636 if(Value & (RISCV_IMM_REACH/2)) {
637 Value |= ~(RISCV_IMM_REACH-1);
638 }
639 Value = Value - (UINT32)mRiscVPass1Sym->sh_addr + mCoffSectionsOffset[mRiscVPass1SymSecIndex];
640
641 if(-2048 > (INT32)Value) {
642 i = (((INT32)Value * -1) / 4096);
643 Value2 -= i;
644 Value += 4096 * i;
645 if(-2048 > (INT32)Value) {
646 Value2 -= 1;
647 Value += 4096;
648 }
649 }
650 else if( 2047 < (INT32)Value) {
651 i = (Value / 4096);
652 Value2 += i;
653 Value -= 4096 * i;
654 if(2047 < (INT32)Value) {
655 Value2 += 1;
656 Value -= 4096;
657 }
658 }
659
660 // Update the IMM of SD instruction
661 //
662 // |31 25|24 20|19 15|14 12 |11 7|6 0|
663 // |-------------------------------------------|-------|
664 // |imm[11:5] | rs2 | rs1 | funct3 |imm[4:0] | opcode|
665 // ---------------------------------------------------
666
667 // First Zero out current IMM
668 *(UINT32 *)Targ &= ~0xfe000f80;
669
670 // Update with new IMM
671 *(UINT32 *)Targ |= (RV_X(Value, 5, 7) << 25);
672 *(UINT32 *)Targ |= (RV_X(Value, 0, 5) << 7);
673
674 // Update previous instruction
675 *(UINT32 *)mRiscVPass1Targ = (RV_X(Value2, 0, 20)<<12) | (RV_X(*(UINT32 *)mRiscVPass1Targ, 0, 12));
676 }
677 mRiscVPass1Sym = NULL;
678 mRiscVPass1Targ = NULL;
679 mRiscVPass1SymSecIndex = 0;
680 break;
681
682 case R_RISCV_PCREL_LO12_I:
683 if (mRiscVPass1Targ != NULL && mRiscVPass1Sym != NULL && mRiscVPass1SymSecIndex != 0) {
684 int i;
685 Value2 = (UINT32)(RV_X(*(UINT32 *)mRiscVPass1Targ, 12, 20));
686
687 if(mRiscVPass1GotFixup) {
688 Value = (UINT32)(mRiscVPass1Offset);
689 } else {
690 Value = (UINT32)(RV_X(*(UINT32 *)Targ, 20, 12));
691 if(Value & (RISCV_IMM_REACH/2)) {
692 Value |= ~(RISCV_IMM_REACH-1);
693 }
694 }
695 Value = Value - (UINT32)mRiscVPass1Sym->sh_addr + mCoffSectionsOffset[mRiscVPass1SymSecIndex];
696
697 if(-2048 > (INT32)Value) {
698 i = (((INT32)Value * -1) / 4096);
699 Value2 -= i;
700 Value += 4096 * i;
701 if(-2048 > (INT32)Value) {
702 Value2 -= 1;
703 Value += 4096;
704 }
705 }
706 else if( 2047 < (INT32)Value) {
707 i = (Value / 4096);
708 Value2 += i;
709 Value -= 4096 * i;
710 if(2047 < (INT32)Value) {
711 Value2 += 1;
712 Value -= 4096;
713 }
714 }
715
716 if(mRiscVPass1GotFixup) {
717 *(UINT32 *)Targ = (RV_X((UINT32)Value, 0, 12) << 20)
718 | (RV_X(*(UINT32*)Targ, 0, 20));
719 // Convert LD instruction to ADDI
720 //
721 // |31 20|19 15|14 12|11 7|6 0|
722 // |-----------------------------------------|
723 // |imm[11:0] | rs1 | 011 | rd | 0000011 | LD
724 // -----------------------------------------
725
726 // |-----------------------------------------|
727 // |imm[11:0] | rs1 | 000 | rd | 0010011 | ADDI
728 // -----------------------------------------
729
730 // To convert, let's first reset bits 12-14 and 0-6 using ~0x707f
731 // Then modify the opcode to ADDI (0010011)
732 // All other fields will remain same.
733
734 *(UINT32 *)Targ = ((*(UINT32 *)Targ & ~0x707f) | 0x13);
735 } else {
736 *(UINT32 *)Targ = (RV_X(Value, 0, 12) << 20) | (RV_X(*(UINT32*)Targ, 0, 20));
737 }
738 *(UINT32 *)mRiscVPass1Targ = (RV_X(Value2, 0, 20)<<12) | (RV_X(*(UINT32 *)mRiscVPass1Targ, 0, 12));
739 }
740 mRiscVPass1Sym = NULL;
741 mRiscVPass1Targ = NULL;
742 mRiscVPass1SymSecIndex = 0;
743 mRiscVPass1Offset = 0;
744 mRiscVPass1GotFixup = 0;
745 break;
746
747 case R_RISCV_ADD64:
748 case R_RISCV_SUB64:
749 case R_RISCV_ADD32:
750 case R_RISCV_SUB32:
751 case R_RISCV_BRANCH:
752 case R_RISCV_JAL:
753 case R_RISCV_GPREL_I:
754 case R_RISCV_GPREL_S:
755 case R_RISCV_CALL:
756 case R_RISCV_CALL_PLT:
757 case R_RISCV_RVC_BRANCH:
758 case R_RISCV_RVC_JUMP:
759 case R_RISCV_RELAX:
760 case R_RISCV_SUB6:
761 case R_RISCV_SET6:
762 case R_RISCV_SET8:
763 case R_RISCV_SET16:
764 case R_RISCV_SET32:
765 break;
766
767 default:
768 Error (NULL, 0, 3000, "Invalid", "WriteSections64(): %s unsupported ELF EM_RISCV64 relocation 0x%x.", mInImageName, (unsigned) ELF_R_TYPE(Rel->r_info));
769 }
770 }
771
772 //
773 // Elf functions interface implementation
774 //
775
776 STATIC
777 VOID
778 ScanSections64 (
779 VOID
780 )
781 {
782 UINT32 i;
783 EFI_IMAGE_DOS_HEADER *DosHdr;
784 EFI_IMAGE_OPTIONAL_HEADER_UNION *NtHdr;
785 UINT32 CoffEntry;
786 UINT32 SectionCount;
787 BOOLEAN FoundSection;
788 UINT32 Offset;
789
790 CoffEntry = 0;
791 mCoffOffset = 0;
792
793 //
794 // Coff file start with a DOS header.
795 //
796 mCoffOffset = sizeof(EFI_IMAGE_DOS_HEADER) + 0x40;
797 mNtHdrOffset = mCoffOffset;
798 switch (mEhdr->e_machine) {
799 case EM_X86_64:
800 case EM_AARCH64:
801 case EM_RISCV64:
802 mCoffOffset += sizeof (EFI_IMAGE_NT_HEADERS64);
803 break;
804 default:
805 VerboseMsg ("%s unknown e_machine type %hu. Assume X64", mInImageName, mEhdr->e_machine);
806 mCoffOffset += sizeof (EFI_IMAGE_NT_HEADERS64);
807 break;
808 }
809
810 mTableOffset = mCoffOffset;
811 mCoffOffset += mCoffNbrSections * sizeof(EFI_IMAGE_SECTION_HEADER);
812
813 //
814 // Set mCoffAlignment to the maximum alignment of the input sections
815 // we care about
816 //
817 for (i = 0; i < mEhdr->e_shnum; i++) {
818 Elf_Shdr *shdr = GetShdrByIndex(i);
819 if (shdr->sh_addralign <= mCoffAlignment) {
820 continue;
821 }
822 if (IsTextShdr(shdr) || IsDataShdr(shdr) || IsHiiRsrcShdr(shdr)) {
823 mCoffAlignment = (UINT32)shdr->sh_addralign;
824 }
825 }
826
827 //
828 // Check if mCoffAlignment is larger than MAX_COFF_ALIGNMENT
829 //
830 if (mCoffAlignment > MAX_COFF_ALIGNMENT) {
831 Error (NULL, 0, 3000, "Invalid", "Section alignment is larger than MAX_COFF_ALIGNMENT.");
832 assert (FALSE);
833 }
834
835
836 //
837 // Move the PE/COFF header right before the first section. This will help us
838 // save space when converting to TE.
839 //
840 if (mCoffAlignment > mCoffOffset) {
841 mNtHdrOffset += mCoffAlignment - mCoffOffset;
842 mTableOffset += mCoffAlignment - mCoffOffset;
843 mCoffOffset = mCoffAlignment;
844 }
845
846 //
847 // First text sections.
848 //
849 mCoffOffset = CoffAlign(mCoffOffset);
850 mTextOffset = mCoffOffset;
851 FoundSection = FALSE;
852 SectionCount = 0;
853 for (i = 0; i < mEhdr->e_shnum; i++) {
854 Elf_Shdr *shdr = GetShdrByIndex(i);
855 if (IsTextShdr(shdr)) {
856 if ((shdr->sh_addralign != 0) && (shdr->sh_addralign != 1)) {
857 // the alignment field is valid
858 if ((shdr->sh_addr & (shdr->sh_addralign - 1)) == 0) {
859 // if the section address is aligned we must align PE/COFF
860 mCoffOffset = (UINT32) ((mCoffOffset + shdr->sh_addralign - 1) & ~(shdr->sh_addralign - 1));
861 } else {
862 Error (NULL, 0, 3000, "Invalid", "Section address not aligned to its own alignment.");
863 }
864 }
865
866 /* Relocate entry. */
867 if ((mEhdr->e_entry >= shdr->sh_addr) &&
868 (mEhdr->e_entry < shdr->sh_addr + shdr->sh_size)) {
869 CoffEntry = (UINT32) (mCoffOffset + mEhdr->e_entry - shdr->sh_addr);
870 }
871
872 //
873 // Set mTextOffset with the offset of the first '.text' section
874 //
875 if (!FoundSection) {
876 mTextOffset = mCoffOffset;
877 FoundSection = TRUE;
878 }
879
880 mCoffSectionsOffset[i] = mCoffOffset;
881 mCoffOffset += (UINT32) shdr->sh_size;
882 SectionCount ++;
883 }
884 }
885
886 if (!FoundSection && mOutImageType != FW_ACPI_IMAGE) {
887 Error (NULL, 0, 3000, "Invalid", "Did not find any '.text' section.");
888 assert (FALSE);
889 }
890
891 mDebugOffset = DebugRvaAlign(mCoffOffset);
892 mCoffOffset = CoffAlign(mCoffOffset);
893
894 if (SectionCount > 1 && mOutImageType == FW_EFI_IMAGE) {
895 Warning (NULL, 0, 0, NULL, "Multiple sections in %s are merged into 1 text section. Source level debug might not work correctly.", mInImageName);
896 }
897
898 //
899 // Then data sections.
900 //
901 mDataOffset = mCoffOffset;
902 FoundSection = FALSE;
903 SectionCount = 0;
904 for (i = 0; i < mEhdr->e_shnum; i++) {
905 Elf_Shdr *shdr = GetShdrByIndex(i);
906 if (IsDataShdr(shdr)) {
907 if ((shdr->sh_addralign != 0) && (shdr->sh_addralign != 1)) {
908 // the alignment field is valid
909 if ((shdr->sh_addr & (shdr->sh_addralign - 1)) == 0) {
910 // if the section address is aligned we must align PE/COFF
911 mCoffOffset = (UINT32) ((mCoffOffset + shdr->sh_addralign - 1) & ~(shdr->sh_addralign - 1));
912 } else {
913 Error (NULL, 0, 3000, "Invalid", "Section address not aligned to its own alignment.");
914 }
915 }
916
917 //
918 // Set mDataOffset with the offset of the first '.data' section
919 //
920 if (!FoundSection) {
921 mDataOffset = mCoffOffset;
922 FoundSection = TRUE;
923 }
924 mCoffSectionsOffset[i] = mCoffOffset;
925 mCoffOffset += (UINT32) shdr->sh_size;
926 SectionCount ++;
927 }
928 }
929
930 //
931 // Make room for .debug data in .data (or .text if .data is empty) instead of
932 // putting it in a section of its own. This is explicitly allowed by the
933 // PE/COFF spec, and prevents bloat in the binary when using large values for
934 // section alignment.
935 //
936 if (SectionCount > 0) {
937 mDebugOffset = DebugRvaAlign(mCoffOffset);
938 }
939 mCoffOffset = mDebugOffset + sizeof(EFI_IMAGE_DEBUG_DIRECTORY_ENTRY) +
940 sizeof(EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY) +
941 strlen(mInImageName) + 1;
942
943 mCoffOffset = CoffAlign(mCoffOffset);
944 if (SectionCount == 0) {
945 mDataOffset = mCoffOffset;
946 }
947
948 if (SectionCount > 1 && mOutImageType == FW_EFI_IMAGE) {
949 Warning (NULL, 0, 0, NULL, "Multiple sections in %s are merged into 1 data section. Source level debug might not work correctly.", mInImageName);
950 }
951
952 //
953 // The Symbol sections.
954 //
955 if (mExportFlag) {
956 UINT32 SymIndex;
957 Elf_Sym *Sym;
958 UINT64 SymNum;
959 const UINT8 *SymName;
960
961 mExportOffset = mCoffOffset;
962 mExportSize = sizeof(EFI_IMAGE_EXPORT_DIRECTORY) + strlen(mInImageName) + 1;
963
964 for (i = 0; i < mEhdr->e_shnum; i++) {
965
966 //
967 // Determine if this is a symbol section.
968 //
969 Elf_Shdr *shdr = GetShdrByIndex(i);
970 if (!IsSymbolShdr(shdr)) {
971 continue;
972 }
973
974 UINT8 *Symtab = (UINT8*)mEhdr + shdr->sh_offset;
975 SymNum = (shdr->sh_size) / (shdr->sh_entsize);
976
977 //
978 // First Get PrmModuleExportDescriptor
979 //
980 for (SymIndex = 0; SymIndex < SymNum; SymIndex++) {
981 Sym = (Elf_Sym *)(Symtab + SymIndex * shdr->sh_entsize);
982 SymName = GetSymName(Sym);
983 if (SymName == NULL) {
984 continue;
985 }
986
987 if (strcmp((CHAR8*)SymName, PRM_MODULE_EXPORT_DESCRIPTOR_NAME) == 0) {
988 //
989 // Find PrmHandler Number and Name
990 //
991 FindPrmHandler(Sym->st_value);
992
993 strcpy(mExportSymName[mExportSymNum], (CHAR8*)SymName);
994 mExportRVA[mExportSymNum] = (UINT32)(Sym->st_value);
995 mExportSize += 2 * EFI_IMAGE_EXPORT_ADDR_SIZE + EFI_IMAGE_EXPORT_ORDINAL_SIZE + strlen((CHAR8 *)SymName) + 1;
996 mExportSymNum ++;
997 break;
998 }
999 }
1000
1001 //
1002 // Second Get PrmHandler
1003 //
1004 for (SymIndex = 0; SymIndex < SymNum; SymIndex++) {
1005 UINT32 ExpIndex;
1006 Sym = (Elf_Sym *)(Symtab + SymIndex * shdr->sh_entsize);
1007 SymName = GetSymName(Sym);
1008 if (SymName == NULL) {
1009 continue;
1010 }
1011
1012 for (ExpIndex = 0; ExpIndex < (mExportSymNum -1); ExpIndex++) {
1013 if (strcmp((CHAR8*)SymName, mExportSymName[ExpIndex]) != 0) {
1014 continue;
1015 }
1016 mExportRVA[ExpIndex] = (UINT32)(Sym->st_value);
1017 mExportSize += 2 * EFI_IMAGE_EXPORT_ADDR_SIZE + EFI_IMAGE_EXPORT_ORDINAL_SIZE + strlen((CHAR8 *)SymName) + 1;
1018 }
1019 }
1020
1021 break;
1022 }
1023
1024 mCoffOffset += mExportSize;
1025 mCoffOffset = CoffAlign(mCoffOffset);
1026 }
1027
1028 //
1029 // The HII resource sections.
1030 //
1031 mHiiRsrcOffset = mCoffOffset;
1032 for (i = 0; i < mEhdr->e_shnum; i++) {
1033 Elf_Shdr *shdr = GetShdrByIndex(i);
1034 if (IsHiiRsrcShdr(shdr)) {
1035 if ((shdr->sh_addralign != 0) && (shdr->sh_addralign != 1)) {
1036 // the alignment field is valid
1037 if ((shdr->sh_addr & (shdr->sh_addralign - 1)) == 0) {
1038 // if the section address is aligned we must align PE/COFF
1039 mCoffOffset = (UINT32) ((mCoffOffset + shdr->sh_addralign - 1) & ~(shdr->sh_addralign - 1));
1040 } else {
1041 Error (NULL, 0, 3000, "Invalid", "Section address not aligned to its own alignment.");
1042 }
1043 }
1044 if (shdr->sh_size != 0) {
1045 mHiiRsrcOffset = mCoffOffset;
1046 mCoffSectionsOffset[i] = mCoffOffset;
1047 mCoffOffset += (UINT32) shdr->sh_size;
1048 mCoffOffset = CoffAlign(mCoffOffset);
1049 SetHiiResourceHeader ((UINT8*) mEhdr + shdr->sh_offset, mHiiRsrcOffset);
1050 }
1051 break;
1052 }
1053 }
1054
1055 mRelocOffset = mCoffOffset;
1056
1057 //
1058 // Allocate base Coff file. Will be expanded later for relocations.
1059 //
1060 mCoffFile = (UINT8 *)malloc(mCoffOffset);
1061 if (mCoffFile == NULL) {
1062 Error (NULL, 0, 4001, "Resource", "memory cannot be allocated!");
1063 }
1064 assert (mCoffFile != NULL);
1065 memset(mCoffFile, 0, mCoffOffset);
1066
1067 //
1068 // Fill headers.
1069 //
1070 DosHdr = (EFI_IMAGE_DOS_HEADER *)mCoffFile;
1071 DosHdr->e_magic = EFI_IMAGE_DOS_SIGNATURE;
1072 DosHdr->e_lfanew = mNtHdrOffset;
1073
1074 NtHdr = (EFI_IMAGE_OPTIONAL_HEADER_UNION*)(mCoffFile + mNtHdrOffset);
1075
1076 NtHdr->Pe32Plus.Signature = EFI_IMAGE_NT_SIGNATURE;
1077
1078 switch (mEhdr->e_machine) {
1079 case EM_X86_64:
1080 NtHdr->Pe32Plus.FileHeader.Machine = EFI_IMAGE_MACHINE_X64;
1081 NtHdr->Pe32Plus.OptionalHeader.Magic = EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC;
1082 break;
1083 case EM_AARCH64:
1084 NtHdr->Pe32Plus.FileHeader.Machine = EFI_IMAGE_MACHINE_AARCH64;
1085 NtHdr->Pe32Plus.OptionalHeader.Magic = EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC;
1086 break;
1087 case EM_RISCV64:
1088 NtHdr->Pe32Plus.FileHeader.Machine = EFI_IMAGE_MACHINE_RISCV64;
1089 NtHdr->Pe32Plus.OptionalHeader.Magic = EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC;
1090 break;
1091
1092 default:
1093 VerboseMsg ("%s unknown e_machine type. Assume X64", (UINTN)mEhdr->e_machine);
1094 NtHdr->Pe32Plus.FileHeader.Machine = EFI_IMAGE_MACHINE_X64;
1095 NtHdr->Pe32Plus.OptionalHeader.Magic = EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC;
1096 }
1097
1098 NtHdr->Pe32Plus.FileHeader.NumberOfSections = mCoffNbrSections;
1099 NtHdr->Pe32Plus.FileHeader.TimeDateStamp = (UINT32) time(NULL);
1100 mImageTimeStamp = NtHdr->Pe32Plus.FileHeader.TimeDateStamp;
1101 NtHdr->Pe32Plus.FileHeader.PointerToSymbolTable = 0;
1102 NtHdr->Pe32Plus.FileHeader.NumberOfSymbols = 0;
1103 NtHdr->Pe32Plus.FileHeader.SizeOfOptionalHeader = sizeof(NtHdr->Pe32Plus.OptionalHeader);
1104 NtHdr->Pe32Plus.FileHeader.Characteristics = EFI_IMAGE_FILE_EXECUTABLE_IMAGE
1105 | EFI_IMAGE_FILE_LINE_NUMS_STRIPPED
1106 | EFI_IMAGE_FILE_LOCAL_SYMS_STRIPPED
1107 | EFI_IMAGE_FILE_LARGE_ADDRESS_AWARE;
1108
1109 NtHdr->Pe32Plus.OptionalHeader.SizeOfCode = mDataOffset - mTextOffset;
1110 NtHdr->Pe32Plus.OptionalHeader.SizeOfInitializedData = mRelocOffset - mDataOffset;
1111 NtHdr->Pe32Plus.OptionalHeader.SizeOfUninitializedData = 0;
1112 NtHdr->Pe32Plus.OptionalHeader.AddressOfEntryPoint = CoffEntry;
1113
1114 NtHdr->Pe32Plus.OptionalHeader.BaseOfCode = mTextOffset;
1115
1116 NtHdr->Pe32Plus.OptionalHeader.ImageBase = 0;
1117 NtHdr->Pe32Plus.OptionalHeader.SectionAlignment = mCoffAlignment;
1118 NtHdr->Pe32Plus.OptionalHeader.FileAlignment = mCoffAlignment;
1119 NtHdr->Pe32Plus.OptionalHeader.SizeOfImage = 0;
1120
1121 NtHdr->Pe32Plus.OptionalHeader.SizeOfHeaders = mTextOffset;
1122 NtHdr->Pe32Plus.OptionalHeader.NumberOfRvaAndSizes = EFI_IMAGE_NUMBER_OF_DIRECTORY_ENTRIES;
1123
1124 //
1125 // Section headers.
1126 //
1127 if ((mDataOffset - mTextOffset) > 0) {
1128 CreateSectionHeader (".text", mTextOffset, mDataOffset - mTextOffset,
1129 EFI_IMAGE_SCN_CNT_CODE
1130 | EFI_IMAGE_SCN_MEM_EXECUTE
1131 | EFI_IMAGE_SCN_MEM_READ);
1132 } else {
1133 // Don't make a section of size 0.
1134 NtHdr->Pe32Plus.FileHeader.NumberOfSections--;
1135 }
1136
1137 //
1138 // If found symbol, add edata section between data and rsrc section
1139 //
1140 if(mExportFlag) {
1141 Offset = mExportOffset;
1142 } else {
1143 Offset = mHiiRsrcOffset;
1144 }
1145
1146 if ((mHiiRsrcOffset - mDataOffset) > 0) {
1147 CreateSectionHeader (".data", mDataOffset, Offset - mDataOffset,
1148 EFI_IMAGE_SCN_CNT_INITIALIZED_DATA
1149 | EFI_IMAGE_SCN_MEM_WRITE
1150 | EFI_IMAGE_SCN_MEM_READ);
1151 } else {
1152 // Don't make a section of size 0.
1153 NtHdr->Pe32Plus.FileHeader.NumberOfSections--;
1154 }
1155
1156 if(mExportFlag) {
1157 if ((mHiiRsrcOffset - mExportOffset) > 0) {
1158 CreateSectionHeader (".edata", mExportOffset, mHiiRsrcOffset - mExportOffset,
1159 EFI_IMAGE_SCN_CNT_INITIALIZED_DATA
1160 | EFI_IMAGE_SCN_MEM_READ);
1161 NtHdr->Pe32Plus.OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_EXPORT].Size = mHiiRsrcOffset - mExportOffset;
1162 NtHdr->Pe32Plus.OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress = mExportOffset;
1163
1164 } else {
1165 // Don't make a section of size 0.
1166 NtHdr->Pe32Plus.FileHeader.NumberOfSections--;
1167 }
1168 }
1169
1170 if ((mRelocOffset - mHiiRsrcOffset) > 0) {
1171 CreateSectionHeader (".rsrc", mHiiRsrcOffset, mRelocOffset - mHiiRsrcOffset,
1172 EFI_IMAGE_SCN_CNT_INITIALIZED_DATA
1173 | EFI_IMAGE_SCN_MEM_READ);
1174
1175 NtHdr->Pe32Plus.OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_RESOURCE].Size = mRelocOffset - mHiiRsrcOffset;
1176 NtHdr->Pe32Plus.OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_RESOURCE].VirtualAddress = mHiiRsrcOffset;
1177 } else {
1178 // Don't make a section of size 0.
1179 NtHdr->Pe32Plus.FileHeader.NumberOfSections--;
1180 }
1181
1182 }
1183
1184 STATIC
1185 BOOLEAN
1186 WriteSections64 (
1187 SECTION_FILTER_TYPES FilterType
1188 )
1189 {
1190 UINT32 Idx;
1191 Elf_Shdr *SecShdr;
1192 UINT32 SecOffset;
1193 BOOLEAN (*Filter)(Elf_Shdr *);
1194 Elf64_Addr GOTEntryRva;
1195
1196 //
1197 // Initialize filter pointer
1198 //
1199 switch (FilterType) {
1200 case SECTION_TEXT:
1201 Filter = IsTextShdr;
1202 break;
1203 case SECTION_HII:
1204 Filter = IsHiiRsrcShdr;
1205 break;
1206 case SECTION_DATA:
1207 Filter = IsDataShdr;
1208 break;
1209 default:
1210 return FALSE;
1211 }
1212
1213 //
1214 // First: copy sections.
1215 //
1216 for (Idx = 0; Idx < mEhdr->e_shnum; Idx++) {
1217 Elf_Shdr *Shdr = GetShdrByIndex(Idx);
1218 if ((*Filter)(Shdr)) {
1219 switch (Shdr->sh_type) {
1220 case SHT_PROGBITS:
1221 /* Copy. */
1222 if (Shdr->sh_offset + Shdr->sh_size > mFileBufferSize) {
1223 return FALSE;
1224 }
1225 memcpy(mCoffFile + mCoffSectionsOffset[Idx],
1226 (UINT8*)mEhdr + Shdr->sh_offset,
1227 (size_t) Shdr->sh_size);
1228 break;
1229
1230 case SHT_NOBITS:
1231 memset(mCoffFile + mCoffSectionsOffset[Idx], 0, (size_t) Shdr->sh_size);
1232 break;
1233
1234 default:
1235 //
1236 // Ignore for unknown section type.
1237 //
1238 VerboseMsg ("%s unknown section type %x. We ignore this unknown section type.", mInImageName, (unsigned)Shdr->sh_type);
1239 break;
1240 }
1241 }
1242 }
1243
1244 //
1245 // Second: apply relocations.
1246 //
1247 VerboseMsg ("Applying Relocations...");
1248 for (Idx = 0; Idx < mEhdr->e_shnum; Idx++) {
1249 //
1250 // Determine if this is a relocation section.
1251 //
1252 Elf_Shdr *RelShdr = GetShdrByIndex(Idx);
1253 if ((RelShdr->sh_type != SHT_REL) && (RelShdr->sh_type != SHT_RELA)) {
1254 continue;
1255 }
1256
1257 //
1258 // If this is a ET_DYN (PIE) executable, we will encounter a dynamic SHT_RELA
1259 // section that applies to the entire binary, and which will have its section
1260 // index set to #0 (which is a NULL section with the SHF_ALLOC bit cleared).
1261 //
1262 // In the absence of GOT based relocations,
1263 // this RELA section will contain redundant R_xxx_RELATIVE relocations, one
1264 // for every R_xxx_xx64 relocation appearing in the per-section RELA sections.
1265 // (i.e., .rela.text and .rela.data)
1266 //
1267 if (RelShdr->sh_info == 0) {
1268 continue;
1269 }
1270
1271 //
1272 // Relocation section found. Now extract section information that the relocations
1273 // apply to in the ELF data and the new COFF data.
1274 //
1275 SecShdr = GetShdrByIndex(RelShdr->sh_info);
1276 SecOffset = mCoffSectionsOffset[RelShdr->sh_info];
1277
1278 //
1279 // Only process relocations for the current filter type.
1280 //
1281 if (RelShdr->sh_type == SHT_RELA && (*Filter)(SecShdr)) {
1282 UINT64 RelIdx;
1283
1284 //
1285 // Determine the symbol table referenced by the relocation data.
1286 //
1287 Elf_Shdr *SymtabShdr = GetShdrByIndex(RelShdr->sh_link);
1288 UINT8 *Symtab = (UINT8*)mEhdr + SymtabShdr->sh_offset;
1289
1290 //
1291 // Process all relocation entries for this section.
1292 //
1293 for (RelIdx = 0; RelIdx < RelShdr->sh_size; RelIdx += (UINT32) RelShdr->sh_entsize) {
1294
1295 //
1296 // Set pointer to relocation entry
1297 //
1298 Elf_Rela *Rel = (Elf_Rela *)((UINT8*)mEhdr + RelShdr->sh_offset + RelIdx);
1299
1300 //
1301 // Set pointer to symbol table entry associated with the relocation entry.
1302 //
1303 Elf_Sym *Sym = (Elf_Sym *)(Symtab + ELF_R_SYM(Rel->r_info) * SymtabShdr->sh_entsize);
1304
1305 Elf_Shdr *SymShdr;
1306 UINT8 *Targ;
1307
1308 //
1309 // Check section header index found in symbol table and get the section
1310 // header location.
1311 //
1312 if (Sym->st_shndx == SHN_UNDEF
1313 || Sym->st_shndx >= mEhdr->e_shnum) {
1314 const UINT8 *SymName = GetSymName(Sym);
1315 if (SymName == NULL) {
1316 SymName = (const UINT8 *)"<unknown>";
1317 }
1318
1319 //
1320 // Skip error on EM_RISCV64 becasue no symble name is built
1321 // from RISC-V toolchain.
1322 //
1323 if (mEhdr->e_machine != EM_RISCV64) {
1324 Error (NULL, 0, 3000, "Invalid",
1325 "%s: Bad definition for symbol '%s'@%#llx or unsupported symbol type. "
1326 "For example, absolute and undefined symbols are not supported.",
1327 mInImageName, SymName, Sym->st_value);
1328
1329 exit(EXIT_FAILURE);
1330 }
1331 continue;
1332 }
1333 SymShdr = GetShdrByIndex(Sym->st_shndx);
1334
1335 //
1336 // Convert the relocation data to a pointer into the coff file.
1337 //
1338 // Note:
1339 // r_offset is the virtual address of the storage unit to be relocated.
1340 // sh_addr is the virtual address for the base of the section.
1341 //
1342 // r_offset in a memory address.
1343 // Convert it to a pointer in the coff file.
1344 //
1345 Targ = mCoffFile + SecOffset + (Rel->r_offset - SecShdr->sh_addr);
1346
1347 //
1348 // Determine how to handle each relocation type based on the machine type.
1349 //
1350 if (mEhdr->e_machine == EM_X86_64) {
1351 switch (ELF_R_TYPE(Rel->r_info)) {
1352 case R_X86_64_NONE:
1353 break;
1354 case R_X86_64_64:
1355 //
1356 // Absolute relocation.
1357 //
1358 VerboseMsg ("R_X86_64_64");
1359 VerboseMsg ("Offset: 0x%08X, Addend: 0x%016LX",
1360 (UINT32)(SecOffset + (Rel->r_offset - SecShdr->sh_addr)),
1361 *(UINT64 *)Targ);
1362 *(UINT64 *)Targ = *(UINT64 *)Targ - SymShdr->sh_addr + mCoffSectionsOffset[Sym->st_shndx];
1363 VerboseMsg ("Relocation: 0x%016LX", *(UINT64*)Targ);
1364 break;
1365 case R_X86_64_32:
1366 VerboseMsg ("R_X86_64_32");
1367 VerboseMsg ("Offset: 0x%08X, Addend: 0x%08X",
1368 (UINT32)(SecOffset + (Rel->r_offset - SecShdr->sh_addr)),
1369 *(UINT32 *)Targ);
1370 *(UINT32 *)Targ = (UINT32)((UINT64)(*(UINT32 *)Targ) - SymShdr->sh_addr + mCoffSectionsOffset[Sym->st_shndx]);
1371 VerboseMsg ("Relocation: 0x%08X", *(UINT32*)Targ);
1372 break;
1373 case R_X86_64_32S:
1374 VerboseMsg ("R_X86_64_32S");
1375 VerboseMsg ("Offset: 0x%08X, Addend: 0x%08X",
1376 (UINT32)(SecOffset + (Rel->r_offset - SecShdr->sh_addr)),
1377 *(UINT32 *)Targ);
1378 *(INT32 *)Targ = (INT32)((INT64)(*(INT32 *)Targ) - SymShdr->sh_addr + mCoffSectionsOffset[Sym->st_shndx]);
1379 VerboseMsg ("Relocation: 0x%08X", *(UINT32*)Targ);
1380 break;
1381
1382 case R_X86_64_PLT32:
1383 //
1384 // Treat R_X86_64_PLT32 relocations as R_X86_64_PC32: this is
1385 // possible since we know all code symbol references resolve to
1386 // definitions in the same module (UEFI has no shared libraries),
1387 // and so there is never a reason to jump via a PLT entry,
1388 // allowing us to resolve the reference using the symbol directly.
1389 //
1390 VerboseMsg ("Treating R_X86_64_PLT32 as R_X86_64_PC32 ...");
1391 /* fall through */
1392 case R_X86_64_PC32:
1393 //
1394 // Relative relocation: Symbol - Ip + Addend
1395 //
1396 VerboseMsg ("R_X86_64_PC32");
1397 VerboseMsg ("Offset: 0x%08X, Addend: 0x%08X",
1398 (UINT32)(SecOffset + (Rel->r_offset - SecShdr->sh_addr)),
1399 *(UINT32 *)Targ);
1400 *(UINT32 *)Targ = (UINT32) (*(UINT32 *)Targ
1401 + (mCoffSectionsOffset[Sym->st_shndx] - SymShdr->sh_addr)
1402 - (SecOffset - SecShdr->sh_addr));
1403 VerboseMsg ("Relocation: 0x%08X", *(UINT32 *)Targ);
1404 break;
1405 case R_X86_64_GOTPCREL:
1406 case R_X86_64_GOTPCRELX:
1407 case R_X86_64_REX_GOTPCRELX:
1408 VerboseMsg ("R_X86_64_GOTPCREL family");
1409 VerboseMsg ("Offset: 0x%08X, Addend: 0x%08X",
1410 (UINT32)(SecOffset + (Rel->r_offset - SecShdr->sh_addr)),
1411 *(UINT32 *)Targ);
1412 GOTEntryRva = Rel->r_offset - Rel->r_addend + *(INT32 *)Targ;
1413 FindElfGOTSectionFromGOTEntryElfRva(GOTEntryRva);
1414 *(UINT32 *)Targ = (UINT32) (*(UINT32 *)Targ
1415 + (mCoffSectionsOffset[mGOTShindex] - mGOTShdr->sh_addr)
1416 - (SecOffset - SecShdr->sh_addr));
1417 VerboseMsg ("Relocation: 0x%08X", *(UINT32 *)Targ);
1418 GOTEntryRva += (mCoffSectionsOffset[mGOTShindex] - mGOTShdr->sh_addr); // ELF Rva -> COFF Rva
1419 if (AccumulateCoffGOTEntries((UINT32)GOTEntryRva)) {
1420 //
1421 // Relocate GOT entry if it's the first time we run into it
1422 //
1423 Targ = mCoffFile + GOTEntryRva;
1424 //
1425 // Limitation: The following three statements assume memory
1426 // at *Targ is valid because the section containing the GOT
1427 // has already been copied from the ELF image to the Coff image.
1428 // This pre-condition presently holds because the GOT is placed
1429 // in section .text, and the ELF text sections are all copied
1430 // prior to reaching this point.
1431 // If the pre-condition is violated in the future, this fixup
1432 // either needs to be deferred after the GOT section is copied
1433 // to the Coff image, or the fixup should be performed on the
1434 // source Elf image instead of the destination Coff image.
1435 //
1436 VerboseMsg ("Offset: 0x%08X, Addend: 0x%016LX",
1437 (UINT32)GOTEntryRva,
1438 *(UINT64 *)Targ);
1439 *(UINT64 *)Targ = *(UINT64 *)Targ - SymShdr->sh_addr + mCoffSectionsOffset[Sym->st_shndx];
1440 VerboseMsg ("Relocation: 0x%016LX", *(UINT64*)Targ);
1441 }
1442 break;
1443 default:
1444 Error (NULL, 0, 3000, "Invalid", "%s unsupported ELF EM_X86_64 relocation 0x%x.", mInImageName, (unsigned) ELF_R_TYPE(Rel->r_info));
1445 }
1446 } else if (mEhdr->e_machine == EM_AARCH64) {
1447
1448 switch (ELF_R_TYPE(Rel->r_info)) {
1449 INT64 Offset;
1450
1451 case R_AARCH64_LD64_GOT_LO12_NC:
1452 //
1453 // Convert into an ADD instruction - see R_AARCH64_ADR_GOT_PAGE below.
1454 //
1455 *(UINT32 *)Targ &= 0x3ff;
1456 *(UINT32 *)Targ |= 0x91000000 | ((Sym->st_value & 0xfff) << 10);
1457 break;
1458
1459 case R_AARCH64_ADR_GOT_PAGE:
1460 //
1461 // This relocation points to the GOT entry that contains the absolute
1462 // address of the symbol we are referring to. Since EDK2 only uses
1463 // fully linked binaries, we can avoid the indirection, and simply
1464 // refer to the symbol directly. This implies having to patch the
1465 // subsequent LDR instruction (covered by a R_AARCH64_LD64_GOT_LO12_NC
1466 // relocation) into an ADD instruction - this is handled above.
1467 //
1468 Offset = (Sym->st_value - (Rel->r_offset & ~0xfff)) >> 12;
1469
1470 *(UINT32 *)Targ &= 0x9000001f;
1471 *(UINT32 *)Targ |= ((Offset & 0x1ffffc) << (5 - 2)) | ((Offset & 0x3) << 29);
1472
1473 /* fall through */
1474
1475 case R_AARCH64_ADR_PREL_PG_HI21:
1476 //
1477 // In order to handle Cortex-A53 erratum #843419, the LD linker may
1478 // convert ADRP instructions into ADR instructions, but without
1479 // updating the static relocation type, and so we may end up here
1480 // while the instruction in question is actually ADR. So let's
1481 // just disregard it: the section offset check we apply below to
1482 // ADR instructions will trigger for its R_AARCH64_xxx_ABS_LO12_NC
1483 // companion instruction as well, so it is safe to omit it here.
1484 //
1485 if ((*(UINT32 *)Targ & BIT31) == 0) {
1486 break;
1487 }
1488
1489 //
1490 // AArch64 PG_H21 relocations are typically paired with ABS_LO12
1491 // relocations, where a PC-relative reference with +/- 4 GB range is
1492 // split into a relative high part and an absolute low part. Since
1493 // the absolute low part represents the offset into a 4 KB page, we
1494 // either have to convert the ADRP into an ADR instruction, or we
1495 // need to use a section alignment of at least 4 KB, so that the
1496 // binary appears at a correct offset at runtime. In any case, we
1497 // have to make sure that the 4 KB relative offsets of both the
1498 // section containing the reference as well as the section to which
1499 // it refers have not been changed during PE/COFF conversion (i.e.,
1500 // in ScanSections64() above).
1501 //
1502 if (mCoffAlignment < 0x1000) {
1503 //
1504 // Attempt to convert the ADRP into an ADR instruction.
1505 // This is only possible if the symbol is within +/- 1 MB.
1506 //
1507
1508 // Decode the ADRP instruction
1509 Offset = (INT32)((*(UINT32 *)Targ & 0xffffe0) << 8);
1510 Offset = (Offset << (6 - 5)) | ((*(UINT32 *)Targ & 0x60000000) >> (29 - 12));
1511
1512 //
1513 // ADRP offset is relative to the previous page boundary,
1514 // whereas ADR offset is relative to the instruction itself.
1515 // So fix up the offset so it points to the page containing
1516 // the symbol.
1517 //
1518 Offset -= (UINTN)(Targ - mCoffFile) & 0xfff;
1519
1520 if (Offset < -0x100000 || Offset > 0xfffff) {
1521 Error (NULL, 0, 3000, "Invalid", "WriteSections64(): %s due to its size (> 1 MB), this module requires 4 KB section alignment.",
1522 mInImageName);
1523 break;
1524 }
1525
1526 // Re-encode the offset as an ADR instruction
1527 *(UINT32 *)Targ &= 0x1000001f;
1528 *(UINT32 *)Targ |= ((Offset & 0x1ffffc) << (5 - 2)) | ((Offset & 0x3) << 29);
1529 }
1530 /* fall through */
1531
1532 case R_AARCH64_ADD_ABS_LO12_NC:
1533 case R_AARCH64_LDST8_ABS_LO12_NC:
1534 case R_AARCH64_LDST16_ABS_LO12_NC:
1535 case R_AARCH64_LDST32_ABS_LO12_NC:
1536 case R_AARCH64_LDST64_ABS_LO12_NC:
1537 case R_AARCH64_LDST128_ABS_LO12_NC:
1538 if (((SecShdr->sh_addr ^ SecOffset) & 0xfff) != 0 ||
1539 ((SymShdr->sh_addr ^ mCoffSectionsOffset[Sym->st_shndx]) & 0xfff) != 0) {
1540 Error (NULL, 0, 3000, "Invalid", "WriteSections64(): %s AARCH64 small code model requires identical ELF and PE/COFF section offsets modulo 4 KB.",
1541 mInImageName);
1542 break;
1543 }
1544 /* fall through */
1545
1546 case R_AARCH64_ADR_PREL_LO21:
1547 case R_AARCH64_CONDBR19:
1548 case R_AARCH64_LD_PREL_LO19:
1549 case R_AARCH64_CALL26:
1550 case R_AARCH64_JUMP26:
1551 case R_AARCH64_PREL64:
1552 case R_AARCH64_PREL32:
1553 case R_AARCH64_PREL16:
1554 //
1555 // The GCC toolchains (i.e., binutils) may corrupt section relative
1556 // relocations when emitting relocation sections into fully linked
1557 // binaries. More specifically, they tend to fail to take into
1558 // account the fact that a '.rodata + XXX' relocation needs to have
1559 // its addend recalculated once .rodata is merged into the .text
1560 // section, and the relocation emitted into the .rela.text section.
1561 //
1562 // We cannot really recover from this loss of information, so the
1563 // only workaround is to prevent having to recalculate any relative
1564 // relocations at all, by using a linker script that ensures that
1565 // the offset between the Place and the Symbol is the same in both
1566 // the ELF and the PE/COFF versions of the binary.
1567 //
1568 if ((SymShdr->sh_addr - SecShdr->sh_addr) !=
1569 (mCoffSectionsOffset[Sym->st_shndx] - SecOffset)) {
1570 Error (NULL, 0, 3000, "Invalid", "WriteSections64(): %s AARCH64 relative relocations require identical ELF and PE/COFF section offsets",
1571 mInImageName);
1572 }
1573 break;
1574
1575 // Absolute relocations.
1576 case R_AARCH64_ABS64:
1577 *(UINT64 *)Targ = *(UINT64 *)Targ - SymShdr->sh_addr + mCoffSectionsOffset[Sym->st_shndx];
1578 break;
1579
1580 default:
1581 Error (NULL, 0, 3000, "Invalid", "WriteSections64(): %s unsupported ELF EM_AARCH64 relocation 0x%x.", mInImageName, (unsigned) ELF_R_TYPE(Rel->r_info));
1582 }
1583 } else if (mEhdr->e_machine == EM_RISCV64) {
1584 //
1585 // Write section for RISC-V 64 architecture.
1586 //
1587 WriteSectionRiscV64 (Rel, Targ, SymShdr, Sym);
1588 } else {
1589 Error (NULL, 0, 3000, "Invalid", "Not a supported machine type");
1590 }
1591 }
1592 }
1593 }
1594
1595 return TRUE;
1596 }
1597
1598 STATIC
1599 VOID
1600 WriteRelocations64 (
1601 VOID
1602 )
1603 {
1604 UINT32 Index;
1605 EFI_IMAGE_OPTIONAL_HEADER_UNION *NtHdr;
1606 EFI_IMAGE_DATA_DIRECTORY *Dir;
1607 UINT32 RiscVRelType;
1608
1609 for (Index = 0; Index < mEhdr->e_shnum; Index++) {
1610 Elf_Shdr *RelShdr = GetShdrByIndex(Index);
1611 if ((RelShdr->sh_type == SHT_REL) || (RelShdr->sh_type == SHT_RELA)) {
1612 Elf_Shdr *SecShdr = GetShdrByIndex (RelShdr->sh_info);
1613 if (IsTextShdr(SecShdr) || IsDataShdr(SecShdr)) {
1614 UINT64 RelIdx;
1615
1616 for (RelIdx = 0; RelIdx < RelShdr->sh_size; RelIdx += RelShdr->sh_entsize) {
1617 Elf_Rela *Rel = (Elf_Rela *)((UINT8*)mEhdr + RelShdr->sh_offset + RelIdx);
1618
1619 if (mEhdr->e_machine == EM_X86_64) {
1620 switch (ELF_R_TYPE(Rel->r_info)) {
1621 case R_X86_64_NONE:
1622 case R_X86_64_PC32:
1623 case R_X86_64_PLT32:
1624 case R_X86_64_GOTPCREL:
1625 case R_X86_64_GOTPCRELX:
1626 case R_X86_64_REX_GOTPCRELX:
1627 break;
1628 case R_X86_64_64:
1629 VerboseMsg ("EFI_IMAGE_REL_BASED_DIR64 Offset: 0x%08X",
1630 mCoffSectionsOffset[RelShdr->sh_info] + (Rel->r_offset - SecShdr->sh_addr));
1631 CoffAddFixup(
1632 (UINT32) ((UINT64) mCoffSectionsOffset[RelShdr->sh_info]
1633 + (Rel->r_offset - SecShdr->sh_addr)),
1634 EFI_IMAGE_REL_BASED_DIR64);
1635 break;
1636 //
1637 // R_X86_64_32 and R_X86_64_32S are ELF64 relocations emitted when using
1638 // the SYSV X64 ABI small non-position-independent code model.
1639 // R_X86_64_32 is used for unsigned 32-bit immediates with a 32-bit operand
1640 // size. The value is either not extended, or zero-extended to 64 bits.
1641 // R_X86_64_32S is used for either signed 32-bit non-rip-relative displacements
1642 // or signed 32-bit immediates with a 64-bit operand size. The value is
1643 // sign-extended to 64 bits.
1644 // EFI_IMAGE_REL_BASED_HIGHLOW is a PE relocation that uses 32-bit arithmetic
1645 // for rebasing an image.
1646 // EFI PE binaries declare themselves EFI_IMAGE_FILE_LARGE_ADDRESS_AWARE and
1647 // may load above 2GB. If an EFI PE binary with a converted R_X86_64_32S
1648 // relocation is loaded above 2GB, the value will get sign-extended to the
1649 // negative part of the 64-bit address space. The negative part of the 64-bit
1650 // address space is unmapped, so accessing such an address page-faults.
1651 // In order to support R_X86_64_32S, it is necessary to unset
1652 // EFI_IMAGE_FILE_LARGE_ADDRESS_AWARE, and the EFI PE loader must implement
1653 // this flag and abstain from loading such a PE binary above 2GB.
1654 // Since this feature is not supported, support for R_X86_64_32S (and hence
1655 // the small non-position-independent code model) is disabled.
1656 //
1657 // case R_X86_64_32S:
1658 case R_X86_64_32:
1659 VerboseMsg ("EFI_IMAGE_REL_BASED_HIGHLOW Offset: 0x%08X",
1660 mCoffSectionsOffset[RelShdr->sh_info] + (Rel->r_offset - SecShdr->sh_addr));
1661 CoffAddFixup(
1662 (UINT32) ((UINT64) mCoffSectionsOffset[RelShdr->sh_info]
1663 + (Rel->r_offset - SecShdr->sh_addr)),
1664 EFI_IMAGE_REL_BASED_HIGHLOW);
1665 break;
1666 default:
1667 Error (NULL, 0, 3000, "Invalid", "%s unsupported ELF EM_X86_64 relocation 0x%x.", mInImageName, (unsigned) ELF_R_TYPE(Rel->r_info));
1668 }
1669 } else if (mEhdr->e_machine == EM_AARCH64) {
1670
1671 switch (ELF_R_TYPE(Rel->r_info)) {
1672 case R_AARCH64_ADR_PREL_LO21:
1673 case R_AARCH64_CONDBR19:
1674 case R_AARCH64_LD_PREL_LO19:
1675 case R_AARCH64_CALL26:
1676 case R_AARCH64_JUMP26:
1677 case R_AARCH64_PREL64:
1678 case R_AARCH64_PREL32:
1679 case R_AARCH64_PREL16:
1680 case R_AARCH64_ADR_PREL_PG_HI21:
1681 case R_AARCH64_ADD_ABS_LO12_NC:
1682 case R_AARCH64_LDST8_ABS_LO12_NC:
1683 case R_AARCH64_LDST16_ABS_LO12_NC:
1684 case R_AARCH64_LDST32_ABS_LO12_NC:
1685 case R_AARCH64_LDST64_ABS_LO12_NC:
1686 case R_AARCH64_LDST128_ABS_LO12_NC:
1687 case R_AARCH64_ADR_GOT_PAGE:
1688 case R_AARCH64_LD64_GOT_LO12_NC:
1689 //
1690 // No fixups are required for relative relocations, provided that
1691 // the relative offsets between sections have been preserved in
1692 // the ELF to PE/COFF conversion. We have already asserted that
1693 // this is the case in WriteSections64 ().
1694 //
1695 break;
1696
1697 case R_AARCH64_ABS64:
1698 CoffAddFixup(
1699 (UINT32) ((UINT64) mCoffSectionsOffset[RelShdr->sh_info]
1700 + (Rel->r_offset - SecShdr->sh_addr)),
1701 EFI_IMAGE_REL_BASED_DIR64);
1702 break;
1703
1704 case R_AARCH64_ABS32:
1705 CoffAddFixup(
1706 (UINT32) ((UINT64) mCoffSectionsOffset[RelShdr->sh_info]
1707 + (Rel->r_offset - SecShdr->sh_addr)),
1708 EFI_IMAGE_REL_BASED_HIGHLOW);
1709 break;
1710
1711 default:
1712 Error (NULL, 0, 3000, "Invalid", "WriteRelocations64(): %s unsupported ELF EM_AARCH64 relocation 0x%x.", mInImageName, (unsigned) ELF_R_TYPE(Rel->r_info));
1713 }
1714 } else if (mEhdr->e_machine == EM_RISCV64) {
1715 RiscVRelType = ELF_R_TYPE(Rel->r_info);
1716 switch (RiscVRelType) {
1717 case R_RISCV_NONE:
1718 break;
1719
1720 case R_RISCV_32:
1721 CoffAddFixup(
1722 (UINT32) ((UINT64) mCoffSectionsOffset[RelShdr->sh_info]
1723 + (Rel->r_offset - SecShdr->sh_addr)),
1724 EFI_IMAGE_REL_BASED_HIGHLOW);
1725 break;
1726
1727 case R_RISCV_64:
1728 CoffAddFixup(
1729 (UINT32) ((UINT64) mCoffSectionsOffset[RelShdr->sh_info]
1730 + (Rel->r_offset - SecShdr->sh_addr)),
1731 EFI_IMAGE_REL_BASED_DIR64);
1732 break;
1733
1734 case R_RISCV_HI20:
1735 CoffAddFixup(
1736 (UINT32) ((UINT64) mCoffSectionsOffset[RelShdr->sh_info]
1737 + (Rel->r_offset - SecShdr->sh_addr)),
1738 EFI_IMAGE_REL_BASED_RISCV_HI20);
1739 break;
1740
1741 case R_RISCV_LO12_I:
1742 CoffAddFixup(
1743 (UINT32) ((UINT64) mCoffSectionsOffset[RelShdr->sh_info]
1744 + (Rel->r_offset - SecShdr->sh_addr)),
1745 EFI_IMAGE_REL_BASED_RISCV_LOW12I);
1746 break;
1747
1748 case R_RISCV_LO12_S:
1749 CoffAddFixup(
1750 (UINT32) ((UINT64) mCoffSectionsOffset[RelShdr->sh_info]
1751 + (Rel->r_offset - SecShdr->sh_addr)),
1752 EFI_IMAGE_REL_BASED_RISCV_LOW12S);
1753 break;
1754
1755 case R_RISCV_ADD64:
1756 CoffAddFixup(
1757 (UINT32) ((UINT64) mCoffSectionsOffset[RelShdr->sh_info]
1758 + (Rel->r_offset - SecShdr->sh_addr)),
1759 EFI_IMAGE_REL_BASED_ABSOLUTE);
1760 break;
1761
1762 case R_RISCV_SUB64:
1763 CoffAddFixup(
1764 (UINT32) ((UINT64) mCoffSectionsOffset[RelShdr->sh_info]
1765 + (Rel->r_offset - SecShdr->sh_addr)),
1766 EFI_IMAGE_REL_BASED_ABSOLUTE);
1767 break;
1768
1769 case R_RISCV_ADD32:
1770 CoffAddFixup(
1771 (UINT32) ((UINT64) mCoffSectionsOffset[RelShdr->sh_info]
1772 + (Rel->r_offset - SecShdr->sh_addr)),
1773 EFI_IMAGE_REL_BASED_ABSOLUTE);
1774 break;
1775
1776 case R_RISCV_SUB32:
1777 CoffAddFixup(
1778 (UINT32) ((UINT64) mCoffSectionsOffset[RelShdr->sh_info]
1779 + (Rel->r_offset - SecShdr->sh_addr)),
1780 EFI_IMAGE_REL_BASED_ABSOLUTE);
1781 break;
1782
1783 case R_RISCV_BRANCH:
1784 CoffAddFixup(
1785 (UINT32) ((UINT64) mCoffSectionsOffset[RelShdr->sh_info]
1786 + (Rel->r_offset - SecShdr->sh_addr)),
1787 EFI_IMAGE_REL_BASED_ABSOLUTE);
1788 break;
1789
1790 case R_RISCV_JAL:
1791 CoffAddFixup(
1792 (UINT32) ((UINT64) mCoffSectionsOffset[RelShdr->sh_info]
1793 + (Rel->r_offset - SecShdr->sh_addr)),
1794 EFI_IMAGE_REL_BASED_ABSOLUTE);
1795 break;
1796
1797 case R_RISCV_GPREL_I:
1798 case R_RISCV_GPREL_S:
1799 case R_RISCV_CALL:
1800 case R_RISCV_CALL_PLT:
1801 case R_RISCV_RVC_BRANCH:
1802 case R_RISCV_RVC_JUMP:
1803 case R_RISCV_RELAX:
1804 case R_RISCV_SUB6:
1805 case R_RISCV_SET6:
1806 case R_RISCV_SET8:
1807 case R_RISCV_SET16:
1808 case R_RISCV_SET32:
1809 case R_RISCV_PCREL_HI20:
1810 case R_RISCV_GOT_HI20:
1811 case R_RISCV_PCREL_LO12_I:
1812 case R_RISCV_PCREL_LO12_S:
1813 break;
1814
1815 default:
1816 Error (NULL, 0, 3000, "Invalid", "WriteRelocations64(): %s unsupported ELF EM_RISCV64 relocation 0x%x.", mInImageName, (unsigned) ELF_R_TYPE(Rel->r_info));
1817 }
1818 } else {
1819 Error (NULL, 0, 3000, "Not Supported", "This tool does not support relocations for ELF with e_machine %u (processor type).", (unsigned) mEhdr->e_machine);
1820 }
1821 }
1822 if (mEhdr->e_machine == EM_X86_64 && RelShdr->sh_info == mGOTShindex) {
1823 //
1824 // Tack relocations for GOT entries after other relocations for
1825 // the section the GOT is in, as it's usually found at the end
1826 // of the section. This is done in order to maintain Rva order
1827 // of Coff relocations.
1828 //
1829 EmitGOTRelocations();
1830 }
1831 }
1832 }
1833 }
1834
1835 if (mEhdr->e_machine == EM_X86_64) {
1836 //
1837 // This is a safety net just in case the GOT is in a section
1838 // with no other relocations and the first invocation of
1839 // EmitGOTRelocations() above was skipped. This invocation
1840 // does not maintain Rva order of Coff relocations.
1841 // At present, with a single text section, all references to
1842 // the GOT and the GOT itself reside in section .text, so
1843 // if there's a GOT at all, the first invocation above
1844 // is executed.
1845 //
1846 EmitGOTRelocations();
1847 }
1848 //
1849 // Pad by adding empty entries.
1850 //
1851 while (mCoffOffset & (mCoffAlignment - 1)) {
1852 CoffAddFixupEntry(0);
1853 }
1854
1855 NtHdr = (EFI_IMAGE_OPTIONAL_HEADER_UNION *)(mCoffFile + mNtHdrOffset);
1856 Dir = &NtHdr->Pe32Plus.OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_BASERELOC];
1857 Dir->Size = mCoffOffset - mRelocOffset;
1858 if (Dir->Size == 0) {
1859 // If no relocations, null out the directory entry and don't add the .reloc section
1860 Dir->VirtualAddress = 0;
1861 NtHdr->Pe32Plus.FileHeader.NumberOfSections--;
1862 } else {
1863 Dir->VirtualAddress = mRelocOffset;
1864 CreateSectionHeader (".reloc", mRelocOffset, mCoffOffset - mRelocOffset,
1865 EFI_IMAGE_SCN_CNT_INITIALIZED_DATA
1866 | EFI_IMAGE_SCN_MEM_DISCARDABLE
1867 | EFI_IMAGE_SCN_MEM_READ);
1868 }
1869 }
1870
1871 STATIC
1872 VOID
1873 WriteDebug64 (
1874 VOID
1875 )
1876 {
1877 UINT32 Len;
1878 EFI_IMAGE_OPTIONAL_HEADER_UNION *NtHdr;
1879 EFI_IMAGE_DATA_DIRECTORY *DataDir;
1880 EFI_IMAGE_DEBUG_DIRECTORY_ENTRY *Dir;
1881 EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY *Nb10;
1882
1883 Len = strlen(mInImageName) + 1;
1884
1885 Dir = (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY*)(mCoffFile + mDebugOffset);
1886 Dir->Type = EFI_IMAGE_DEBUG_TYPE_CODEVIEW;
1887 Dir->SizeOfData = sizeof(EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY) + Len;
1888 Dir->RVA = mDebugOffset + sizeof(EFI_IMAGE_DEBUG_DIRECTORY_ENTRY);
1889 Dir->FileOffset = mDebugOffset + sizeof(EFI_IMAGE_DEBUG_DIRECTORY_ENTRY);
1890
1891 Nb10 = (EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY*)(Dir + 1);
1892 Nb10->Signature = CODEVIEW_SIGNATURE_NB10;
1893 strcpy ((char *)(Nb10 + 1), mInImageName);
1894
1895
1896 NtHdr = (EFI_IMAGE_OPTIONAL_HEADER_UNION *)(mCoffFile + mNtHdrOffset);
1897 DataDir = &NtHdr->Pe32Plus.OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_DEBUG];
1898 DataDir->VirtualAddress = mDebugOffset;
1899 DataDir->Size = sizeof(EFI_IMAGE_DEBUG_DIRECTORY_ENTRY);
1900 }
1901
1902 STATIC
1903 VOID
1904 SetImageSize64 (
1905 VOID
1906 )
1907 {
1908 EFI_IMAGE_OPTIONAL_HEADER_UNION *NtHdr;
1909
1910 //
1911 // Set image size
1912 //
1913 NtHdr = (EFI_IMAGE_OPTIONAL_HEADER_UNION *)(mCoffFile + mNtHdrOffset);
1914 NtHdr->Pe32Plus.OptionalHeader.SizeOfImage = mCoffOffset;
1915 }
1916
1917 STATIC
1918 VOID
1919 CleanUp64 (
1920 VOID
1921 )
1922 {
1923 if (mCoffSectionsOffset != NULL) {
1924 free (mCoffSectionsOffset);
1925 }
1926 }
1927
1928 STATIC
1929 VOID
1930 WriteExport64 (
1931 VOID
1932 )
1933 {
1934 EFI_IMAGE_OPTIONAL_HEADER_UNION *NtHdr;
1935 EFI_IMAGE_EXPORT_DIRECTORY *ExportDir;
1936 EFI_IMAGE_DATA_DIRECTORY *DataDir;
1937 UINT32 FileNameOffset;
1938 UINT32 NameOffset;
1939 UINT16 Index;
1940 UINT8 *Tdata = NULL;
1941
1942 ExportDir = (EFI_IMAGE_EXPORT_DIRECTORY*)(mCoffFile + mExportOffset);
1943 ExportDir->Characteristics = 0;
1944 ExportDir->TimeDateStamp = 0;
1945 ExportDir->MajorVersion = 0;
1946 ExportDir->MinorVersion =0;
1947 ExportDir->Name = 0;
1948 ExportDir->NumberOfFunctions = mExportSymNum;
1949 ExportDir->NumberOfNames = mExportSymNum;
1950 ExportDir->Base = EFI_IMAGE_EXPORT_ORDINAL_BASE;
1951 ExportDir->AddressOfFunctions = mExportOffset + sizeof(EFI_IMAGE_EXPORT_DIRECTORY);
1952 ExportDir->AddressOfNames = ExportDir->AddressOfFunctions + EFI_IMAGE_EXPORT_ADDR_SIZE * mExportSymNum;
1953 ExportDir->AddressOfNameOrdinals = ExportDir->AddressOfNames + EFI_IMAGE_EXPORT_ADDR_SIZE * mExportSymNum;
1954
1955 FileNameOffset = ExportDir->AddressOfNameOrdinals + EFI_IMAGE_EXPORT_ORDINAL_SIZE * mExportSymNum;
1956 NameOffset = FileNameOffset + strlen(mInImageName) + 1;
1957
1958 // Write Input image Name RVA
1959 ExportDir->Name = FileNameOffset;
1960
1961 // Write Input image Name
1962 strcpy((char *)(mCoffFile + FileNameOffset), mInImageName);
1963
1964 for (Index = 0; Index < mExportSymNum; Index++) {
1965 //
1966 // Write Export Address Table
1967 //
1968 Tdata = mCoffFile + ExportDir->AddressOfFunctions + Index * EFI_IMAGE_EXPORT_ADDR_SIZE;
1969 *(UINT32 *)Tdata = mExportRVA[Index];
1970
1971 //
1972 // Write Export Name Pointer Table
1973 //
1974 Tdata = mCoffFile + ExportDir->AddressOfNames + Index * EFI_IMAGE_EXPORT_ADDR_SIZE;
1975 *(UINT32 *)Tdata = NameOffset;
1976
1977 //
1978 // Write Export Ordinal table
1979 //
1980 Tdata = mCoffFile + ExportDir->AddressOfNameOrdinals + Index * EFI_IMAGE_EXPORT_ORDINAL_SIZE;
1981 *(UINT16 *)Tdata = Index;
1982
1983 //
1984 // Write Export Name Table
1985 //
1986 strcpy((char *)(mCoffFile + NameOffset), mExportSymName[Index]);
1987 NameOffset += strlen(mExportSymName[Index]) + 1;
1988 }
1989
1990 NtHdr = (EFI_IMAGE_OPTIONAL_HEADER_UNION *)(mCoffFile + mNtHdrOffset);
1991 DataDir = &NtHdr->Pe32Plus.OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_EXPORT];
1992 DataDir->VirtualAddress = mExportOffset;
1993 DataDir->Size = mExportSize;
1994
1995 }
1996
EFI Development Kit II mirror for PVE