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TOMOYO Linux Cross Reference
Linux/arch/mips/include/asm/elf.h

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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 SHN_MIPS_ACCOMON        0xff00          /* Allocated common symbols */
127 #define SHN_MIPS_TEXT           0xff01          /* Allocated test symbols.  */
128 #define SHN_MIPS_DATA           0xff02          /* Allocated data symbols.  */
129 #define SHN_MIPS_SCOMMON        0xff03          /* Small common symbols */
130 #define SHN_MIPS_SUNDEFINED     0xff04          /* Small undefined symbols */
131 
132 #define SHT_MIPS_LIST           0x70000000
133 #define SHT_MIPS_CONFLICT       0x70000002
134 #define SHT_MIPS_GPTAB          0x70000003
135 #define SHT_MIPS_UCODE          0x70000004
136 #define SHT_MIPS_DEBUG          0x70000005
137 #define SHT_MIPS_REGINFO        0x70000006
138 #define SHT_MIPS_PACKAGE        0x70000007
139 #define SHT_MIPS_PACKSYM        0x70000008
140 #define SHT_MIPS_RELD           0x70000009
141 #define SHT_MIPS_IFACE          0x7000000b
142 #define SHT_MIPS_CONTENT        0x7000000c
143 #define SHT_MIPS_OPTIONS        0x7000000d
144 #define SHT_MIPS_SHDR           0x70000010
145 #define SHT_MIPS_FDESC          0x70000011
146 #define SHT_MIPS_EXTSYM         0x70000012
147 #define SHT_MIPS_DENSE          0x70000013
148 #define SHT_MIPS_PDESC          0x70000014
149 #define SHT_MIPS_LOCSYM         0x70000015
150 #define SHT_MIPS_AUXSYM         0x70000016
151 #define SHT_MIPS_OPTSYM         0x70000017
152 #define SHT_MIPS_LOCSTR         0x70000018
153 #define SHT_MIPS_LINE           0x70000019
154 #define SHT_MIPS_RFDESC         0x7000001a
155 #define SHT_MIPS_DELTASYM       0x7000001b
156 #define SHT_MIPS_DELTAINST      0x7000001c
157 #define SHT_MIPS_DELTACLASS     0x7000001d
158 #define SHT_MIPS_DWARF          0x7000001e
159 #define SHT_MIPS_DELTADECL      0x7000001f
160 #define SHT_MIPS_SYMBOL_LIB     0x70000020
161 #define SHT_MIPS_EVENTS         0x70000021
162 #define SHT_MIPS_TRANSLATE      0x70000022
163 #define SHT_MIPS_PIXIE          0x70000023
164 #define SHT_MIPS_XLATE          0x70000024
165 #define SHT_MIPS_XLATE_DEBUG    0x70000025
166 #define SHT_MIPS_WHIRL          0x70000026
167 #define SHT_MIPS_EH_REGION      0x70000027
168 #define SHT_MIPS_XLATE_OLD      0x70000028
169 #define SHT_MIPS_PDR_EXCEPTION  0x70000029
170 
171 #define SHF_MIPS_GPREL          0x10000000
172 #define SHF_MIPS_MERGE          0x20000000
173 #define SHF_MIPS_ADDR           0x40000000
174 #define SHF_MIPS_STRING         0x80000000
175 #define SHF_MIPS_NOSTRIP        0x08000000
176 #define SHF_MIPS_LOCAL          0x04000000
177 #define SHF_MIPS_NAMES          0x02000000
178 #define SHF_MIPS_NODUPES        0x01000000
179 
180 #define MIPS_ABI_FP_ANY         0       /* FP ABI doesn't matter */
181 #define MIPS_ABI_FP_DOUBLE      1       /* -mdouble-float */
182 #define MIPS_ABI_FP_SINGLE      2       /* -msingle-float */
183 #define MIPS_ABI_FP_SOFT        3       /* -msoft-float */
184 #define MIPS_ABI_FP_OLD_64      4       /* -mips32r2 -mfp64 */
185 #define MIPS_ABI_FP_XX          5       /* -mfpxx */
186 #define MIPS_ABI_FP_64          6       /* -mips32r2 -mfp64 */
187 #define MIPS_ABI_FP_64A         7       /* -mips32r2 -mfp64 -mno-odd-spreg */
188 
189 struct mips_elf_abiflags_v0 {
190         uint16_t version;       /* Version of flags structure */
191         uint8_t isa_level;      /* The level of the ISA: 1-5, 32, 64 */
192         uint8_t isa_rev;        /* The revision of ISA: 0 for MIPS V and below,
193                                    1-n otherwise */
194         uint8_t gpr_size;       /* The size of general purpose registers */
195         uint8_t cpr1_size;      /* The size of co-processor 1 registers */
196         uint8_t cpr2_size;      /* The size of co-processor 2 registers */
197         uint8_t fp_abi;         /* The floating-point ABI */
198         uint32_t isa_ext;       /* Mask of processor-specific extensions */
199         uint32_t ases;          /* Mask of ASEs used */
200         uint32_t flags1;        /* Mask of general flags */
201         uint32_t flags2;
202 };
203 
204 #ifndef ELF_ARCH
205 /* ELF register definitions */
206 #define ELF_NGREG       45
207 #define ELF_NFPREG      33
208 
209 typedef unsigned long elf_greg_t;
210 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
211 
212 typedef double elf_fpreg_t;
213 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
214 
215 void mips_dump_regs32(u32 *uregs, const struct pt_regs *regs);
216 void mips_dump_regs64(u64 *uregs, const struct pt_regs *regs);
217 
218 #ifdef CONFIG_32BIT
219 /*
220  * This is used to ensure we don't load something for the wrong architecture.
221  */
222 #define elf_check_arch elfo32_check_arch
223 
224 /*
225  * These are used to set parameters in the core dumps.
226  */
227 #define ELF_CLASS       ELFCLASS32
228 
229 #define ELF_CORE_COPY_REGS(dest, regs) \
230         mips_dump_regs32((u32 *)&(dest), (regs));
231 
232 #endif /* CONFIG_32BIT */
233 
234 #ifdef CONFIG_64BIT
235 /*
236  * This is used to ensure we don't load something for the wrong architecture.
237  */
238 #define elf_check_arch elfn64_check_arch
239 
240 /*
241  * These are used to set parameters in the core dumps.
242  */
243 #define ELF_CLASS       ELFCLASS64
244 
245 #define ELF_CORE_COPY_REGS(dest, regs) \
246         mips_dump_regs64((u64 *)&(dest), (regs));
247 
248 #endif /* CONFIG_64BIT */
249 
250 /*
251  * These are used to set parameters in the core dumps.
252  */
253 #ifdef __MIPSEB__
254 #define ELF_DATA        ELFDATA2MSB
255 #elif defined(__MIPSEL__)
256 #define ELF_DATA        ELFDATA2LSB
257 #endif
258 #define ELF_ARCH        EM_MIPS
259 
260 #endif /* !defined(ELF_ARCH) */
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 ELF binary.
281  */
282 #define elfo32_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                 __res = 0;                                              \
293         if (((__h->e_flags & EF_MIPS_ABI) != 0) &&                      \
294             ((__h->e_flags & EF_MIPS_ABI) != EF_MIPS_ABI_O32))          \
295                 __res = 0;                                              \
296         if (__h->e_flags & __MIPS_O32_FP64_MUST_BE_ZERO)                \
297                 __res = 0;                                              \
298                                                                         \
299         __res;                                                          \
300 })
301 
302 /*
303  * Return non-zero if HDR identifies an n64 ELF binary.
304  */
305 #define elfn64_check_arch(hdr)                                          \
306 ({                                                                      \
307         int __res = 1;                                                  \
308         struct elfhdr *__h = (hdr);                                     \
309                                                                         \
310         if (!mips_elf_check_machine(__h))                               \
311                 __res = 0;                                              \
312         if (__h->e_ident[EI_CLASS] != ELFCLASS64)                       \
313                 __res = 0;                                              \
314                                                                         \
315         __res;                                                          \
316 })
317 
318 /*
319  * Return non-zero if HDR identifies an n32 ELF binary.
320  */
321 #define elfn32_check_arch(hdr)                                          \
322 ({                                                                      \
323         int __res = 1;                                                  \
324         struct elfhdr *__h = (hdr);                                     \
325                                                                         \
326         if (!mips_elf_check_machine(__h))                               \
327                 __res = 0;                                              \
328         if (__h->e_ident[EI_CLASS] != ELFCLASS32)                       \
329                 __res = 0;                                              \
330         if (((__h->e_flags & EF_MIPS_ABI2) == 0) ||                     \
331             ((__h->e_flags & EF_MIPS_ABI) != 0))                        \
332                 __res = 0;                                              \
333                                                                         \
334         __res;                                                          \
335 })
336 
337 struct mips_abi;
338 
339 extern struct mips_abi mips_abi;
340 extern struct mips_abi mips_abi_32;
341 extern struct mips_abi mips_abi_n32;
342 
343 #ifdef CONFIG_32BIT
344 
345 #define SET_PERSONALITY2(ex, state)                                     \
346 do {                                                                    \
347         clear_thread_flag(TIF_HYBRID_FPREGS);                           \
348         set_thread_flag(TIF_32BIT_FPREGS);                              \
349                                                                         \
350         current->thread.abi = &mips_abi;                                \
351                                                                         \
352         mips_set_personality_fp(state);                                 \
353         mips_set_personality_nan(state);                                \
354                                                                         \
355         if (personality(current->personality) != PER_LINUX)             \
356                 set_personality(PER_LINUX);                             \
357 } while (0)
358 
359 #endif /* CONFIG_32BIT */
360 
361 #ifdef CONFIG_64BIT
362 
363 #ifdef CONFIG_MIPS32_N32
364 #define __SET_PERSONALITY32_N32()                                       \
365         do {                                                            \
366                 set_thread_flag(TIF_32BIT_ADDR);                        \
367                                                                         \
368                 current->thread.abi = &mips_abi_n32;                    \
369         } while (0)
370 #else
371 #define __SET_PERSONALITY32_N32()                                       \
372         do { } while (0)
373 #endif
374 
375 #ifdef CONFIG_MIPS32_O32
376 #define __SET_PERSONALITY32_O32(ex, state)                              \
377         do {                                                            \
378                 set_thread_flag(TIF_32BIT_REGS);                        \
379                 set_thread_flag(TIF_32BIT_ADDR);                        \
380                 clear_thread_flag(TIF_HYBRID_FPREGS);                   \
381                 set_thread_flag(TIF_32BIT_FPREGS);                      \
382                                                                         \
383                 current->thread.abi = &mips_abi_32;                     \
384                                                                         \
385                 mips_set_personality_fp(state);                         \
386         } while (0)
387 #else
388 #define __SET_PERSONALITY32_O32(ex, state)                              \
389         do { } while (0)
390 #endif
391 
392 #ifdef CONFIG_MIPS32_COMPAT
393 #define __SET_PERSONALITY32(ex, state)                                  \
394 do {                                                                    \
395         if ((((ex).e_flags & EF_MIPS_ABI2) != 0) &&                     \
396              ((ex).e_flags & EF_MIPS_ABI) == 0)                         \
397                 __SET_PERSONALITY32_N32();                              \
398         else                                                            \
399                 __SET_PERSONALITY32_O32(ex, state);                     \
400 } while (0)
401 #else
402 #define __SET_PERSONALITY32(ex, state) do { } while (0)
403 #endif
404 
405 #define SET_PERSONALITY2(ex, state)                                     \
406 do {                                                                    \
407         unsigned int p;                                                 \
408                                                                         \
409         clear_thread_flag(TIF_32BIT_REGS);                              \
410         clear_thread_flag(TIF_32BIT_FPREGS);                            \
411         clear_thread_flag(TIF_HYBRID_FPREGS);                           \
412         clear_thread_flag(TIF_32BIT_ADDR);                              \
413                                                                         \
414         if ((ex).e_ident[EI_CLASS] == ELFCLASS32)                       \
415                 __SET_PERSONALITY32(ex, state);                         \
416         else                                                            \
417                 current->thread.abi = &mips_abi;                        \
418                                                                         \
419         mips_set_personality_nan(state);                                \
420                                                                         \
421         p = personality(current->personality);                          \
422         if (p != PER_LINUX32 && p != PER_LINUX)                         \
423                 set_personality(PER_LINUX);                             \
424 } while (0)
425 
426 #endif /* CONFIG_64BIT */
427 
428 #define CORE_DUMP_USE_REGSET
429 #define ELF_EXEC_PAGESIZE       PAGE_SIZE
430 
431 /* This yields a mask that user programs can use to figure out what
432    instruction set this cpu supports.  This could be done in userspace,
433    but it's not easy, and we've already done it here.  */
434 
435 #define ELF_HWCAP       (elf_hwcap)
436 extern unsigned int elf_hwcap;
437 #include <asm/hwcap.h>
438 
439 /*
440  * This yields a string that ld.so will use to load implementation
441  * specific libraries for optimization.  This is more specific in
442  * intent than poking at uname or /proc/cpuinfo.
443  */
444 
445 #define ELF_PLATFORM  __elf_platform
446 extern const char *__elf_platform;
447 
448 /*
449  * See comments in asm-alpha/elf.h, this is the same thing
450  * on the MIPS.
451  */
452 #define ELF_PLAT_INIT(_r, load_addr)    do { \
453         _r->regs[1] = _r->regs[2] = _r->regs[3] = _r->regs[4] = 0;      \
454         _r->regs[5] = _r->regs[6] = _r->regs[7] = _r->regs[8] = 0;      \
455         _r->regs[9] = _r->regs[10] = _r->regs[11] = _r->regs[12] = 0;   \
456         _r->regs[13] = _r->regs[14] = _r->regs[15] = _r->regs[16] = 0;  \
457         _r->regs[17] = _r->regs[18] = _r->regs[19] = _r->regs[20] = 0;  \
458         _r->regs[21] = _r->regs[22] = _r->regs[23] = _r->regs[24] = 0;  \
459         _r->regs[25] = _r->regs[26] = _r->regs[27] = _r->regs[28] = 0;  \
460         _r->regs[30] = _r->regs[31] = 0;                                \
461 } while (0)
462 
463 /* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
464    use of this is to invoke "./ld.so someprog" to test out a new version of
465    the loader.  We need to make sure that it is out of the way of the program
466    that it will "exec", and that there is sufficient room for the brk.  */
467 
468 #ifndef ELF_ET_DYN_BASE
469 #define ELF_ET_DYN_BASE         (TASK_SIZE / 3 * 2)
470 #endif
471 
472 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
473 #define ARCH_DLINFO                                                     \
474 do {                                                                    \
475         NEW_AUX_ENT(AT_SYSINFO_EHDR,                                    \
476                     (unsigned long)current->mm->context.vdso);          \
477 } while (0)
478 
479 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
480 struct linux_binprm;
481 extern int arch_setup_additional_pages(struct linux_binprm *bprm,
482                                        int uses_interp);
483 
484 struct arch_elf_state {
485         int nan_2008;
486         int fp_abi;
487         int interp_fp_abi;
488         int overall_fp_mode;
489 };
490 
491 #define MIPS_ABI_FP_UNKNOWN     (-1)    /* Unknown FP ABI (kernel internal) */
492 
493 #define INIT_ARCH_ELF_STATE {                   \
494         .nan_2008 = -1,                         \
495         .fp_abi = MIPS_ABI_FP_UNKNOWN,          \
496         .interp_fp_abi = MIPS_ABI_FP_UNKNOWN,   \
497         .overall_fp_mode = -1,                  \
498 }
499 
500 /* Whether to accept legacy-NaN and 2008-NaN user binaries.  */
501 extern bool mips_use_nan_legacy;
502 extern bool mips_use_nan_2008;
503 
504 extern int arch_elf_pt_proc(void *ehdr, void *phdr, struct file *elf,
505                             bool is_interp, struct arch_elf_state *state);
506 
507 extern int arch_check_elf(void *ehdr, bool has_interpreter, void *interp_ehdr,
508                           struct arch_elf_state *state);
509 
510 extern void mips_set_personality_nan(struct arch_elf_state *state);
511 extern void mips_set_personality_fp(struct arch_elf_state *state);
512 
513 #define elf_read_implies_exec(ex, stk) mips_elf_read_implies_exec(&(ex), stk)
514 extern int mips_elf_read_implies_exec(void *elf_ex, int exstack);
515 
516 #endif /* _ASM_ELF_H */
517 

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