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1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Much of this is taken from binutils and GNU libc ...
7 */
8#ifndef _ASM_ELF_H
9#define _ASM_ELF_H
10
11#include <linux/auxvec.h>
12#include <linux/fs.h>
13#include <linux/mm_types.h>
14
15#include <uapi/linux/elf.h>
16
17#include <asm/current.h>
18
19/* ELF header e_flags defines. */
20/* MIPS architecture level. */
21#define EF_MIPS_ARCH_1 0x00000000 /* -mips1 code. */
22#define EF_MIPS_ARCH_2 0x10000000 /* -mips2 code. */
23#define EF_MIPS_ARCH_3 0x20000000 /* -mips3 code. */
24#define EF_MIPS_ARCH_4 0x30000000 /* -mips4 code. */
25#define EF_MIPS_ARCH_5 0x40000000 /* -mips5 code. */
26#define EF_MIPS_ARCH_32 0x50000000 /* MIPS32 code. */
27#define EF_MIPS_ARCH_64 0x60000000 /* MIPS64 code. */
28#define EF_MIPS_ARCH_32R2 0x70000000 /* MIPS32 R2 code. */
29#define EF_MIPS_ARCH_64R2 0x80000000 /* MIPS64 R2 code. */
30
31/* The ABI of a file. */
32#define EF_MIPS_ABI_O32 0x00001000 /* O32 ABI. */
33#define EF_MIPS_ABI_O64 0x00002000 /* O32 extended for 64 bit. */
34
35#define PT_MIPS_REGINFO 0x70000000
36#define PT_MIPS_RTPROC 0x70000001
37#define PT_MIPS_OPTIONS 0x70000002
38#define PT_MIPS_ABIFLAGS 0x70000003
39
40/* Flags in the e_flags field of the header */
41#define EF_MIPS_NOREORDER 0x00000001
42#define EF_MIPS_PIC 0x00000002
43#define EF_MIPS_CPIC 0x00000004
44#define EF_MIPS_ABI2 0x00000020
45#define EF_MIPS_OPTIONS_FIRST 0x00000080
46#define EF_MIPS_32BITMODE 0x00000100
47#define EF_MIPS_FP64 0x00000200
48#define EF_MIPS_NAN2008 0x00000400
49#define EF_MIPS_ABI 0x0000f000
50#define EF_MIPS_ARCH 0xf0000000
51
52#define DT_MIPS_RLD_VERSION 0x70000001
53#define DT_MIPS_TIME_STAMP 0x70000002
54#define DT_MIPS_ICHECKSUM 0x70000003
55#define DT_MIPS_IVERSION 0x70000004
56#define DT_MIPS_FLAGS 0x70000005
57 #define RHF_NONE 0x00000000
58 #define RHF_HARDWAY 0x00000001
59 #define RHF_NOTPOT 0x00000002
60 #define RHF_SGI_ONLY 0x00000010
61#define DT_MIPS_BASE_ADDRESS 0x70000006
62#define DT_MIPS_CONFLICT 0x70000008
63#define DT_MIPS_LIBLIST 0x70000009
64#define DT_MIPS_LOCAL_GOTNO 0x7000000a
65#define DT_MIPS_CONFLICTNO 0x7000000b
66#define DT_MIPS_LIBLISTNO 0x70000010
67#define DT_MIPS_SYMTABNO 0x70000011
68#define DT_MIPS_UNREFEXTNO 0x70000012
69#define DT_MIPS_GOTSYM 0x70000013
70#define DT_MIPS_HIPAGENO 0x70000014
71#define DT_MIPS_RLD_MAP 0x70000016
72
73#define R_MIPS_NONE 0
74#define R_MIPS_16 1
75#define R_MIPS_32 2
76#define R_MIPS_REL32 3
77#define R_MIPS_26 4
78#define R_MIPS_HI16 5
79#define R_MIPS_LO16 6
80#define R_MIPS_GPREL16 7
81#define R_MIPS_LITERAL 8
82#define R_MIPS_GOT16 9
83#define R_MIPS_PC16 10
84#define R_MIPS_CALL16 11
85#define R_MIPS_GPREL32 12
86/* The remaining relocs are defined on Irix, although they are not
87 in the MIPS ELF ABI. */
88#define R_MIPS_UNUSED1 13
89#define R_MIPS_UNUSED2 14
90#define R_MIPS_UNUSED3 15
91#define R_MIPS_SHIFT5 16
92#define R_MIPS_SHIFT6 17
93#define R_MIPS_64 18
94#define R_MIPS_GOT_DISP 19
95#define R_MIPS_GOT_PAGE 20
96#define R_MIPS_GOT_OFST 21
97/*
98 * The following two relocation types are specified in the MIPS ABI
99 * conformance guide version 1.2 but not yet in the psABI.
100 */
101#define R_MIPS_GOTHI16 22
102#define R_MIPS_GOTLO16 23
103#define R_MIPS_SUB 24
104#define R_MIPS_INSERT_A 25
105#define R_MIPS_INSERT_B 26
106#define R_MIPS_DELETE 27
107#define R_MIPS_HIGHER 28
108#define R_MIPS_HIGHEST 29
109/*
110 * The following two relocation types are specified in the MIPS ABI
111 * conformance guide version 1.2 but not yet in the psABI.
112 */
113#define R_MIPS_CALLHI16 30
114#define R_MIPS_CALLLO16 31
115/*
116 * Introduced for MIPSr6.
117 */
118#define R_MIPS_PC21_S2 60
119#define R_MIPS_PC26_S2 61
120/*
121 * This range is reserved for vendor specific relocations.
122 */
123#define R_MIPS_LOVENDOR 100
124#define R_MIPS_HIVENDOR 127
125
126#define R_MIPS_PC32 248
127
128#define SHN_MIPS_ACCOMON 0xff00 /* Allocated common symbols */
129#define SHN_MIPS_TEXT 0xff01 /* Allocated test symbols. */
130#define SHN_MIPS_DATA 0xff02 /* Allocated data symbols. */
131#define SHN_MIPS_SCOMMON 0xff03 /* Small common symbols */
132#define SHN_MIPS_SUNDEFINED 0xff04 /* Small undefined symbols */
133
134#define SHT_MIPS_LIST 0x70000000
135#define SHT_MIPS_CONFLICT 0x70000002
136#define SHT_MIPS_GPTAB 0x70000003
137#define SHT_MIPS_UCODE 0x70000004
138#define SHT_MIPS_DEBUG 0x70000005
139#define SHT_MIPS_REGINFO 0x70000006
140#define SHT_MIPS_PACKAGE 0x70000007
141#define SHT_MIPS_PACKSYM 0x70000008
142#define SHT_MIPS_RELD 0x70000009
143#define SHT_MIPS_IFACE 0x7000000b
144#define SHT_MIPS_CONTENT 0x7000000c
145#define SHT_MIPS_OPTIONS 0x7000000d
146#define SHT_MIPS_SHDR 0x70000010
147#define SHT_MIPS_FDESC 0x70000011
148#define SHT_MIPS_EXTSYM 0x70000012
149#define SHT_MIPS_DENSE 0x70000013
150#define SHT_MIPS_PDESC 0x70000014
151#define SHT_MIPS_LOCSYM 0x70000015
152#define SHT_MIPS_AUXSYM 0x70000016
153#define SHT_MIPS_OPTSYM 0x70000017
154#define SHT_MIPS_LOCSTR 0x70000018
155#define SHT_MIPS_LINE 0x70000019
156#define SHT_MIPS_RFDESC 0x7000001a
157#define SHT_MIPS_DELTASYM 0x7000001b
158#define SHT_MIPS_DELTAINST 0x7000001c
159#define SHT_MIPS_DELTACLASS 0x7000001d
160#define SHT_MIPS_DWARF 0x7000001e
161#define SHT_MIPS_DELTADECL 0x7000001f
162#define SHT_MIPS_SYMBOL_LIB 0x70000020
163#define SHT_MIPS_EVENTS 0x70000021
164#define SHT_MIPS_TRANSLATE 0x70000022
165#define SHT_MIPS_PIXIE 0x70000023
166#define SHT_MIPS_XLATE 0x70000024
167#define SHT_MIPS_XLATE_DEBUG 0x70000025
168#define SHT_MIPS_WHIRL 0x70000026
169#define SHT_MIPS_EH_REGION 0x70000027
170#define SHT_MIPS_XLATE_OLD 0x70000028
171#define SHT_MIPS_PDR_EXCEPTION 0x70000029
172
173#define SHF_MIPS_GPREL 0x10000000
174#define SHF_MIPS_MERGE 0x20000000
175#define SHF_MIPS_ADDR 0x40000000
176#define SHF_MIPS_STRING 0x80000000
177#define SHF_MIPS_NOSTRIP 0x08000000
178#define SHF_MIPS_LOCAL 0x04000000
179#define SHF_MIPS_NAMES 0x02000000
180#define SHF_MIPS_NODUPES 0x01000000
181
182#define MIPS_ABI_FP_ANY 0 /* FP ABI doesn't matter */
183#define MIPS_ABI_FP_DOUBLE 1 /* -mdouble-float */
184#define MIPS_ABI_FP_SINGLE 2 /* -msingle-float */
185#define MIPS_ABI_FP_SOFT 3 /* -msoft-float */
186#define MIPS_ABI_FP_OLD_64 4 /* -mips32r2 -mfp64 */
187#define MIPS_ABI_FP_XX 5 /* -mfpxx */
188#define MIPS_ABI_FP_64 6 /* -mips32r2 -mfp64 */
189#define MIPS_ABI_FP_64A 7 /* -mips32r2 -mfp64 -mno-odd-spreg */
190
191struct mips_elf_abiflags_v0 {
192 uint16_t version; /* Version of flags structure */
193 uint8_t isa_level; /* The level of the ISA: 1-5, 32, 64 */
194 uint8_t isa_rev; /* The revision of ISA: 0 for MIPS V and below,
195 1-n otherwise */
196 uint8_t gpr_size; /* The size of general purpose registers */
197 uint8_t cpr1_size; /* The size of co-processor 1 registers */
198 uint8_t cpr2_size; /* The size of co-processor 2 registers */
199 uint8_t fp_abi; /* The floating-point ABI */
200 uint32_t isa_ext; /* Mask of processor-specific extensions */
201 uint32_t ases; /* Mask of ASEs used */
202 uint32_t flags1; /* Mask of general flags */
203 uint32_t flags2;
204};
205
206/* ELF register definitions */
207#define ELF_NGREG 45
208#define ELF_NFPREG 33
209
210typedef unsigned long elf_greg_t;
211typedef elf_greg_t elf_gregset_t[ELF_NGREG];
212
213typedef double elf_fpreg_t;
214typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
215
216void mips_dump_regs32(u32 *uregs, const struct pt_regs *regs);
217void mips_dump_regs64(u64 *uregs, const struct pt_regs *regs);
218
219#ifdef CONFIG_32BIT
220/*
221 * This is used to ensure we don't load something for the wrong architecture.
222 */
223#define elf_check_arch elf32_check_arch
224
225/*
226 * These are used to set parameters in the core dumps.
227 */
228#define ELF_CLASS ELFCLASS32
229
230#define ELF_CORE_COPY_REGS(dest, regs) \
231 mips_dump_regs32((u32 *)&(dest), (regs));
232
233#endif /* CONFIG_32BIT */
234
235#ifdef CONFIG_64BIT
236/*
237 * This is used to ensure we don't load something for the wrong architecture.
238 */
239#define elf_check_arch elf64_check_arch
240#define compat_elf_check_arch elf32_check_arch
241
242/*
243 * These are used to set parameters in the core dumps.
244 */
245#define ELF_CLASS ELFCLASS64
246
247#define ELF_CORE_COPY_REGS(dest, regs) \
248 mips_dump_regs64((u64 *)&(dest), (regs));
249
250#endif /* CONFIG_64BIT */
251
252/*
253 * These are used to set parameters in the core dumps.
254 */
255#ifdef __MIPSEB__
256#define ELF_DATA ELFDATA2MSB
257#elif defined(__MIPSEL__)
258#define ELF_DATA ELFDATA2LSB
259#endif
260#define ELF_ARCH EM_MIPS
261
262/*
263 * In order to be sure that we don't attempt to execute an O32 binary which
264 * requires 64 bit FP (FR=1) on a system which does not support it we refuse
265 * to execute any binary which has bits specified by the following macro set
266 * in its ELF header flags.
267 */
268#ifdef CONFIG_MIPS_O32_FP64_SUPPORT
269# define __MIPS_O32_FP64_MUST_BE_ZERO 0
270#else
271# define __MIPS_O32_FP64_MUST_BE_ZERO EF_MIPS_FP64
272#endif
273
274#define mips_elf_check_machine(x) ((x)->e_machine == EM_MIPS)
275
276#define vmcore_elf32_check_arch mips_elf_check_machine
277#define vmcore_elf64_check_arch mips_elf_check_machine
278
279/*
280 * Return non-zero if HDR identifies an o32 or n32 ELF binary.
281 */
282#define elf32_check_arch(hdr) \
283({ \
284 int __res = 1; \
285 struct elfhdr *__h = (hdr); \
286 \
287 if (!mips_elf_check_machine(__h)) \
288 __res = 0; \
289 if (__h->e_ident[EI_CLASS] != ELFCLASS32) \
290 __res = 0; \
291 if ((__h->e_flags & EF_MIPS_ABI2) != 0) { \
292 if (!IS_ENABLED(CONFIG_MIPS32_N32) || \
293 (__h->e_flags & EF_MIPS_ABI)) \
294 __res = 0; \
295 } else { \
296 if (IS_ENABLED(CONFIG_64BIT) && !IS_ENABLED(CONFIG_MIPS32_O32)) \
297 __res = 0; \
298 if (((__h->e_flags & EF_MIPS_ABI) != 0) && \
299 ((__h->e_flags & EF_MIPS_ABI) != EF_MIPS_ABI_O32)) \
300 __res = 0; \
301 if (__h->e_flags & __MIPS_O32_FP64_MUST_BE_ZERO) \
302 __res = 0; \
303 } \
304 __res; \
305})
306
307/*
308 * Return non-zero if HDR identifies an n64 ELF binary.
309 */
310#define elf64_check_arch(hdr) \
311({ \
312 int __res = 1; \
313 struct elfhdr *__h = (hdr); \
314 \
315 if (!mips_elf_check_machine(__h)) \
316 __res = 0; \
317 if (__h->e_ident[EI_CLASS] != ELFCLASS64) \
318 __res = 0; \
319 \
320 __res; \
321})
322
323struct mips_abi;
324
325extern struct mips_abi mips_abi;
326extern struct mips_abi mips_abi_32;
327extern struct mips_abi mips_abi_n32;
328
329#ifdef CONFIG_32BIT
330
331#define SET_PERSONALITY2(ex, state) \
332do { \
333 clear_thread_flag(TIF_HYBRID_FPREGS); \
334 set_thread_flag(TIF_32BIT_FPREGS); \
335 \
336 current->thread.abi = &mips_abi; \
337 \
338 mips_set_personality_fp(state); \
339 mips_set_personality_nan(state); \
340 \
341 if (personality(current->personality) != PER_LINUX) \
342 set_personality(PER_LINUX); \
343} while (0)
344
345#endif /* CONFIG_32BIT */
346
347#ifdef CONFIG_64BIT
348
349#ifdef CONFIG_MIPS32_N32
350#define __SET_PERSONALITY32_N32() \
351 do { \
352 set_thread_flag(TIF_32BIT_ADDR); \
353 \
354 current->thread.abi = &mips_abi_n32; \
355 } while (0)
356#else
357#define __SET_PERSONALITY32_N32() \
358 do { } while (0)
359#endif
360
361#ifdef CONFIG_MIPS32_O32
362#define __SET_PERSONALITY32_O32(ex, state) \
363 do { \
364 set_thread_flag(TIF_32BIT_REGS); \
365 set_thread_flag(TIF_32BIT_ADDR); \
366 clear_thread_flag(TIF_HYBRID_FPREGS); \
367 set_thread_flag(TIF_32BIT_FPREGS); \
368 \
369 current->thread.abi = &mips_abi_32; \
370 \
371 mips_set_personality_fp(state); \
372 } while (0)
373#else
374#define __SET_PERSONALITY32_O32(ex, state) \
375 do { } while (0)
376#endif
377
378#ifdef CONFIG_MIPS32_COMPAT
379#define __SET_PERSONALITY32(ex, state) \
380do { \
381 if ((((ex).e_flags & EF_MIPS_ABI2) != 0) && \
382 ((ex).e_flags & EF_MIPS_ABI) == 0) \
383 __SET_PERSONALITY32_N32(); \
384 else \
385 __SET_PERSONALITY32_O32(ex, state); \
386} while (0)
387#else
388#define __SET_PERSONALITY32(ex, state) do { } while (0)
389#endif
390
391#define SET_PERSONALITY2(ex, state) \
392do { \
393 unsigned int p; \
394 \
395 clear_thread_flag(TIF_32BIT_REGS); \
396 clear_thread_flag(TIF_32BIT_FPREGS); \
397 clear_thread_flag(TIF_HYBRID_FPREGS); \
398 clear_thread_flag(TIF_32BIT_ADDR); \
399 current->personality &= ~READ_IMPLIES_EXEC; \
400 \
401 if ((ex).e_ident[EI_CLASS] == ELFCLASS32) \
402 __SET_PERSONALITY32(ex, state); \
403 else \
404 current->thread.abi = &mips_abi; \
405 \
406 mips_set_personality_nan(state); \
407 \
408 p = personality(current->personality); \
409 if (p != PER_LINUX32 && p != PER_LINUX) \
410 set_personality(PER_LINUX); \
411} while (0)
412
413#endif /* CONFIG_64BIT */
414
415#define CORE_DUMP_USE_REGSET
416#define ELF_EXEC_PAGESIZE PAGE_SIZE
417
418/* This yields a mask that user programs can use to figure out what
419 instruction set this cpu supports. This could be done in userspace,
420 but it's not easy, and we've already done it here. */
421
422#define ELF_HWCAP (elf_hwcap)
423extern unsigned int elf_hwcap;
424#include <asm/hwcap.h>
425
426/*
427 * This yields a string that ld.so will use to load implementation
428 * specific libraries for optimization. This is more specific in
429 * intent than poking at uname or /proc/cpuinfo.
430 */
431
432#define ELF_PLATFORM __elf_platform
433extern const char *__elf_platform;
434
435#define ELF_BASE_PLATFORM __elf_base_platform
436extern const char *__elf_base_platform;
437
438/*
439 * See comments in asm-alpha/elf.h, this is the same thing
440 * on the MIPS.
441 */
442#define ELF_PLAT_INIT(_r, load_addr) do { \
443 _r->regs[1] = _r->regs[2] = _r->regs[3] = _r->regs[4] = 0; \
444 _r->regs[5] = _r->regs[6] = _r->regs[7] = _r->regs[8] = 0; \
445 _r->regs[9] = _r->regs[10] = _r->regs[11] = _r->regs[12] = 0; \
446 _r->regs[13] = _r->regs[14] = _r->regs[15] = _r->regs[16] = 0; \
447 _r->regs[17] = _r->regs[18] = _r->regs[19] = _r->regs[20] = 0; \
448 _r->regs[21] = _r->regs[22] = _r->regs[23] = _r->regs[24] = 0; \
449 _r->regs[25] = _r->regs[26] = _r->regs[27] = _r->regs[28] = 0; \
450 _r->regs[30] = _r->regs[31] = 0; \
451} while (0)
452
453/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
454 use of this is to invoke "./ld.so someprog" to test out a new version of
455 the loader. We need to make sure that it is out of the way of the program
456 that it will "exec", and that there is sufficient room for the brk. */
457
458#define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2)
459
460/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
461#define ARCH_DLINFO \
462do { \
463 NEW_AUX_ENT(AT_SYSINFO_EHDR, \
464 (unsigned long)current->mm->context.vdso); \
465} while (0)
466
467#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
468struct linux_binprm;
469extern int arch_setup_additional_pages(struct linux_binprm *bprm,
470 int uses_interp);
471
472#ifdef CONFIG_MIPS_FP_SUPPORT
473
474struct arch_elf_state {
475 int nan_2008;
476 int fp_abi;
477 int interp_fp_abi;
478 int overall_fp_mode;
479};
480
481#define MIPS_ABI_FP_UNKNOWN (-1) /* Unknown FP ABI (kernel internal) */
482
483#define INIT_ARCH_ELF_STATE { \
484 .nan_2008 = -1, \
485 .fp_abi = MIPS_ABI_FP_UNKNOWN, \
486 .interp_fp_abi = MIPS_ABI_FP_UNKNOWN, \
487 .overall_fp_mode = -1, \
488}
489
490extern int arch_elf_pt_proc(void *ehdr, void *phdr, struct file *elf,
491 bool is_interp, struct arch_elf_state *state);
492
493extern int arch_check_elf(void *ehdr, bool has_interpreter, void *interp_ehdr,
494 struct arch_elf_state *state);
495
496/* Whether to accept legacy-NaN and 2008-NaN user binaries. */
497extern bool mips_use_nan_legacy;
498extern bool mips_use_nan_2008;
499
500extern void mips_set_personality_nan(struct arch_elf_state *state);
501extern void mips_set_personality_fp(struct arch_elf_state *state);
502
503#else /* !CONFIG_MIPS_FP_SUPPORT */
504
505struct arch_elf_state;
506
507static inline void mips_set_personality_nan(struct arch_elf_state *state)
508{
509 /* no-op */
510}
511
512static inline void mips_set_personality_fp(struct arch_elf_state *state)
513{
514 /* no-op */
515}
516
517#endif /* !CONFIG_MIPS_FP_SUPPORT */
518
519#define elf_read_implies_exec(ex, stk) mips_elf_read_implies_exec(&(ex), stk)
520extern int mips_elf_read_implies_exec(void *elf_ex, int exstack);
521
522#endif /* _ASM_ELF_H */