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
6 * Much of this is taken from binutils and GNU libc ...
12 #include <uapi/linux/elf.h>
14 #include <asm/cpu-info.h>
15 #include <asm/current.h>
17 /* ELF header e_flags defines. */
18 /* MIPS architecture level. */
19 #define EF_MIPS_ARCH_1 0x00000000 /* -mips1 code. */
20 #define EF_MIPS_ARCH_2 0x10000000 /* -mips2 code. */
21 #define EF_MIPS_ARCH_3 0x20000000 /* -mips3 code. */
22 #define EF_MIPS_ARCH_4 0x30000000 /* -mips4 code. */
23 #define EF_MIPS_ARCH_5 0x40000000 /* -mips5 code. */
24 #define EF_MIPS_ARCH_32 0x50000000 /* MIPS32 code. */
25 #define EF_MIPS_ARCH_64 0x60000000 /* MIPS64 code. */
26 #define EF_MIPS_ARCH_32R2 0x70000000 /* MIPS32 R2 code. */
27 #define EF_MIPS_ARCH_64R2 0x80000000 /* MIPS64 R2 code. */
29 /* The ABI of a file. */
30 #define EF_MIPS_ABI_O32 0x00001000 /* O32 ABI. */
31 #define EF_MIPS_ABI_O64 0x00002000 /* O32 extended for 64 bit. */
33 #define PT_MIPS_REGINFO 0x70000000
34 #define PT_MIPS_RTPROC 0x70000001
35 #define PT_MIPS_OPTIONS 0x70000002
36 #define PT_MIPS_ABIFLAGS 0x70000003
38 /* Flags in the e_flags field of the header */
39 #define EF_MIPS_NOREORDER 0x00000001
40 #define EF_MIPS_PIC 0x00000002
41 #define EF_MIPS_CPIC 0x00000004
42 #define EF_MIPS_ABI2 0x00000020
43 #define EF_MIPS_OPTIONS_FIRST 0x00000080
44 #define EF_MIPS_32BITMODE 0x00000100
45 #define EF_MIPS_FP64 0x00000200
46 #define EF_MIPS_ABI 0x0000f000
47 #define EF_MIPS_ARCH 0xf0000000
49 #define DT_MIPS_RLD_VERSION 0x70000001
50 #define DT_MIPS_TIME_STAMP 0x70000002
51 #define DT_MIPS_ICHECKSUM 0x70000003
52 #define DT_MIPS_IVERSION 0x70000004
53 #define DT_MIPS_FLAGS 0x70000005
54 #define RHF_NONE 0x00000000
55 #define RHF_HARDWAY 0x00000001
56 #define RHF_NOTPOT 0x00000002
57 #define RHF_SGI_ONLY 0x00000010
58 #define DT_MIPS_BASE_ADDRESS 0x70000006
59 #define DT_MIPS_CONFLICT 0x70000008
60 #define DT_MIPS_LIBLIST 0x70000009
61 #define DT_MIPS_LOCAL_GOTNO 0x7000000a
62 #define DT_MIPS_CONFLICTNO 0x7000000b
63 #define DT_MIPS_LIBLISTNO 0x70000010
64 #define DT_MIPS_SYMTABNO 0x70000011
65 #define DT_MIPS_UNREFEXTNO 0x70000012
66 #define DT_MIPS_GOTSYM 0x70000013
67 #define DT_MIPS_HIPAGENO 0x70000014
68 #define DT_MIPS_RLD_MAP 0x70000016
73 #define R_MIPS_REL32 3
77 #define R_MIPS_GPREL16 7
78 #define R_MIPS_LITERAL 8
79 #define R_MIPS_GOT16 9
80 #define R_MIPS_PC16 10
81 #define R_MIPS_CALL16 11
82 #define R_MIPS_GPREL32 12
83 /* The remaining relocs are defined on Irix, although they are not
84 in the MIPS ELF ABI. */
85 #define R_MIPS_UNUSED1 13
86 #define R_MIPS_UNUSED2 14
87 #define R_MIPS_UNUSED3 15
88 #define R_MIPS_SHIFT5 16
89 #define R_MIPS_SHIFT6 17
91 #define R_MIPS_GOT_DISP 19
92 #define R_MIPS_GOT_PAGE 20
93 #define R_MIPS_GOT_OFST 21
95 * The following two relocation types are specified in the MIPS ABI
96 * conformance guide version 1.2 but not yet in the psABI.
98 #define R_MIPS_GOTHI16 22
99 #define R_MIPS_GOTLO16 23
100 #define R_MIPS_SUB 24
101 #define R_MIPS_INSERT_A 25
102 #define R_MIPS_INSERT_B 26
103 #define R_MIPS_DELETE 27
104 #define R_MIPS_HIGHER 28
105 #define R_MIPS_HIGHEST 29
107 * The following two relocation types are specified in the MIPS ABI
108 * conformance guide version 1.2 but not yet in the psABI.
110 #define R_MIPS_CALLHI16 30
111 #define R_MIPS_CALLLO16 31
113 * This range is reserved for vendor specific relocations.
115 #define R_MIPS_LOVENDOR 100
116 #define R_MIPS_HIVENDOR 127
118 #define SHN_MIPS_ACCOMON 0xff00 /* Allocated common symbols */
119 #define SHN_MIPS_TEXT 0xff01 /* Allocated test symbols. */
120 #define SHN_MIPS_DATA 0xff02 /* Allocated data symbols. */
121 #define SHN_MIPS_SCOMMON 0xff03 /* Small common symbols */
122 #define SHN_MIPS_SUNDEFINED 0xff04 /* Small undefined symbols */
124 #define SHT_MIPS_LIST 0x70000000
125 #define SHT_MIPS_CONFLICT 0x70000002
126 #define SHT_MIPS_GPTAB 0x70000003
127 #define SHT_MIPS_UCODE 0x70000004
128 #define SHT_MIPS_DEBUG 0x70000005
129 #define SHT_MIPS_REGINFO 0x70000006
130 #define SHT_MIPS_PACKAGE 0x70000007
131 #define SHT_MIPS_PACKSYM 0x70000008
132 #define SHT_MIPS_RELD 0x70000009
133 #define SHT_MIPS_IFACE 0x7000000b
134 #define SHT_MIPS_CONTENT 0x7000000c
135 #define SHT_MIPS_OPTIONS 0x7000000d
136 #define SHT_MIPS_SHDR 0x70000010
137 #define SHT_MIPS_FDESC 0x70000011
138 #define SHT_MIPS_EXTSYM 0x70000012
139 #define SHT_MIPS_DENSE 0x70000013
140 #define SHT_MIPS_PDESC 0x70000014
141 #define SHT_MIPS_LOCSYM 0x70000015
142 #define SHT_MIPS_AUXSYM 0x70000016
143 #define SHT_MIPS_OPTSYM 0x70000017
144 #define SHT_MIPS_LOCSTR 0x70000018
145 #define SHT_MIPS_LINE 0x70000019
146 #define SHT_MIPS_RFDESC 0x7000001a
147 #define SHT_MIPS_DELTASYM 0x7000001b
148 #define SHT_MIPS_DELTAINST 0x7000001c
149 #define SHT_MIPS_DELTACLASS 0x7000001d
150 #define SHT_MIPS_DWARF 0x7000001e
151 #define SHT_MIPS_DELTADECL 0x7000001f
152 #define SHT_MIPS_SYMBOL_LIB 0x70000020
153 #define SHT_MIPS_EVENTS 0x70000021
154 #define SHT_MIPS_TRANSLATE 0x70000022
155 #define SHT_MIPS_PIXIE 0x70000023
156 #define SHT_MIPS_XLATE 0x70000024
157 #define SHT_MIPS_XLATE_DEBUG 0x70000025
158 #define SHT_MIPS_WHIRL 0x70000026
159 #define SHT_MIPS_EH_REGION 0x70000027
160 #define SHT_MIPS_XLATE_OLD 0x70000028
161 #define SHT_MIPS_PDR_EXCEPTION 0x70000029
163 #define SHF_MIPS_GPREL 0x10000000
164 #define SHF_MIPS_MERGE 0x20000000
165 #define SHF_MIPS_ADDR 0x40000000
166 #define SHF_MIPS_STRING 0x80000000
167 #define SHF_MIPS_NOSTRIP 0x08000000
168 #define SHF_MIPS_LOCAL 0x04000000
169 #define SHF_MIPS_NAMES 0x02000000
170 #define SHF_MIPS_NODUPES 0x01000000
173 /* ELF register definitions */
175 #define ELF_NFPREG 33
177 typedef unsigned long elf_greg_t;
178 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
180 typedef double elf_fpreg_t;
181 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
183 struct mips_elf_abiflags_v0 {
184 uint16_t version; /* Version of flags structure */
185 uint8_t isa_level; /* The level of the ISA: 1-5, 32, 64 */
186 uint8_t isa_rev; /* The revision of ISA: 0 for MIPS V and below,
188 uint8_t gpr_size; /* The size of general purpose registers */
189 uint8_t cpr1_size; /* The size of co-processor 1 registers */
190 uint8_t cpr2_size; /* The size of co-processor 2 registers */
191 uint8_t fp_abi; /* The floating-point ABI */
192 uint32_t isa_ext; /* Mask of processor-specific extensions */
193 uint32_t ases; /* Mask of ASEs used */
194 uint32_t flags1; /* Mask of general flags */
198 #define MIPS_ABI_FP_ANY 0 /* FP ABI doesn't matter */
199 #define MIPS_ABI_FP_DOUBLE 1 /* -mdouble-float */
200 #define MIPS_ABI_FP_SINGLE 2 /* -msingle-float */
201 #define MIPS_ABI_FP_SOFT 3 /* -msoft-float */
202 #define MIPS_ABI_FP_OLD_64 4 /* -mips32r2 -mfp64 */
203 #define MIPS_ABI_FP_XX 5 /* -mfpxx */
204 #define MIPS_ABI_FP_64 6 /* -mips32r2 -mfp64 */
205 #define MIPS_ABI_FP_64A 7 /* -mips32r2 -mfp64 -mno-odd-spreg */
210 * In order to be sure that we don't attempt to execute an O32 binary which
211 * requires 64 bit FP (FR=1) on a system which does not support it we refuse
212 * to execute any binary which has bits specified by the following macro set
213 * in its ELF header flags.
215 #ifdef CONFIG_MIPS_O32_FP64_SUPPORT
216 # define __MIPS_O32_FP64_MUST_BE_ZERO 0
218 # define __MIPS_O32_FP64_MUST_BE_ZERO EF_MIPS_FP64
222 * This is used to ensure we don't load something for the wrong architecture.
224 #define elf_check_arch(hdr) \
227 struct elfhdr *__h = (hdr); \
229 if (__h->e_machine != EM_MIPS) \
231 if (__h->e_ident[EI_CLASS] != ELFCLASS32) \
233 if ((__h->e_flags & EF_MIPS_ABI2) != 0) \
235 if (((__h->e_flags & EF_MIPS_ABI) != 0) && \
236 ((__h->e_flags & EF_MIPS_ABI) != EF_MIPS_ABI_O32)) \
238 if (__h->e_flags & __MIPS_O32_FP64_MUST_BE_ZERO) \
245 * These are used to set parameters in the core dumps.
247 #define ELF_CLASS ELFCLASS32
249 #endif /* CONFIG_32BIT */
253 * This is used to ensure we don't load something for the wrong architecture.
255 #define elf_check_arch(hdr) \
258 struct elfhdr *__h = (hdr); \
260 if (__h->e_machine != EM_MIPS) \
262 if (__h->e_ident[EI_CLASS] != ELFCLASS64) \
269 * These are used to set parameters in the core dumps.
271 #define ELF_CLASS ELFCLASS64
273 #endif /* CONFIG_64BIT */
276 * These are used to set parameters in the core dumps.
279 #define ELF_DATA ELFDATA2MSB
280 #elif defined(__MIPSEL__)
281 #define ELF_DATA ELFDATA2LSB
283 #define ELF_ARCH EM_MIPS
285 #endif /* !defined(ELF_ARCH) */
289 extern struct mips_abi mips_abi;
290 extern struct mips_abi mips_abi_32;
291 extern struct mips_abi mips_abi_n32;
295 #define SET_PERSONALITY2(ex, state) \
297 if (personality(current->personality) != PER_LINUX) \
298 set_personality(PER_LINUX); \
300 clear_thread_flag(TIF_HYBRID_FPREGS); \
301 set_thread_flag(TIF_32BIT_FPREGS); \
303 mips_set_personality_fp(state); \
305 current->thread.abi = &mips_abi; \
307 current->thread.fpu.fcr31 = current_cpu_data.fpu_csr31; \
310 #endif /* CONFIG_32BIT */
314 #ifdef CONFIG_MIPS32_N32
315 #define __SET_PERSONALITY32_N32() \
317 set_thread_flag(TIF_32BIT_ADDR); \
318 current->thread.abi = &mips_abi_n32; \
321 #define __SET_PERSONALITY32_N32() \
325 #ifdef CONFIG_MIPS32_O32
326 #define __SET_PERSONALITY32_O32(ex, state) \
328 set_thread_flag(TIF_32BIT_REGS); \
329 set_thread_flag(TIF_32BIT_ADDR); \
330 clear_thread_flag(TIF_HYBRID_FPREGS); \
331 set_thread_flag(TIF_32BIT_FPREGS); \
333 mips_set_personality_fp(state); \
335 current->thread.abi = &mips_abi_32; \
338 #define __SET_PERSONALITY32_O32(ex, state) \
342 #ifdef CONFIG_MIPS32_COMPAT
343 #define __SET_PERSONALITY32(ex, state) \
345 if ((((ex).e_flags & EF_MIPS_ABI2) != 0) && \
346 ((ex).e_flags & EF_MIPS_ABI) == 0) \
347 __SET_PERSONALITY32_N32(); \
349 __SET_PERSONALITY32_O32(ex, state); \
352 #define __SET_PERSONALITY32(ex, state) do { } while (0)
355 #define SET_PERSONALITY2(ex, state) \
359 clear_thread_flag(TIF_32BIT_REGS); \
360 clear_thread_flag(TIF_32BIT_FPREGS); \
361 clear_thread_flag(TIF_HYBRID_FPREGS); \
362 clear_thread_flag(TIF_32BIT_ADDR); \
364 if ((ex).e_ident[EI_CLASS] == ELFCLASS32) \
365 __SET_PERSONALITY32(ex, state); \
367 current->thread.abi = &mips_abi; \
369 current->thread.fpu.fcr31 = current_cpu_data.fpu_csr31; \
371 p = personality(current->personality); \
372 if (p != PER_LINUX32 && p != PER_LINUX) \
373 set_personality(PER_LINUX); \
376 #endif /* CONFIG_64BIT */
378 #define CORE_DUMP_USE_REGSET
379 #define ELF_EXEC_PAGESIZE PAGE_SIZE
381 /* This yields a mask that user programs can use to figure out what
382 instruction set this cpu supports. This could be done in userspace,
383 but it's not easy, and we've already done it here. */
385 #define ELF_HWCAP (0)
388 * This yields a string that ld.so will use to load implementation
389 * specific libraries for optimization. This is more specific in
390 * intent than poking at uname or /proc/cpuinfo.
393 #define ELF_PLATFORM __elf_platform
394 extern const char *__elf_platform;
397 * See comments in asm-alpha/elf.h, this is the same thing
400 #define ELF_PLAT_INIT(_r, load_addr) do { \
401 _r->regs[1] = _r->regs[2] = _r->regs[3] = _r->regs[4] = 0; \
402 _r->regs[5] = _r->regs[6] = _r->regs[7] = _r->regs[8] = 0; \
403 _r->regs[9] = _r->regs[10] = _r->regs[11] = _r->regs[12] = 0; \
404 _r->regs[13] = _r->regs[14] = _r->regs[15] = _r->regs[16] = 0; \
405 _r->regs[17] = _r->regs[18] = _r->regs[19] = _r->regs[20] = 0; \
406 _r->regs[21] = _r->regs[22] = _r->regs[23] = _r->regs[24] = 0; \
407 _r->regs[25] = _r->regs[26] = _r->regs[27] = _r->regs[28] = 0; \
408 _r->regs[30] = _r->regs[31] = 0; \
411 /* This is the location that an ET_DYN program is loaded if exec'ed. Typical
412 use of this is to invoke "./ld.so someprog" to test out a new version of
413 the loader. We need to make sure that it is out of the way of the program
414 that it will "exec", and that there is sufficient room for the brk. */
416 #ifndef ELF_ET_DYN_BASE
417 #define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2)
420 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
422 extern int arch_setup_additional_pages(struct linux_binprm *bprm,
425 struct arch_elf_state {
431 #define MIPS_ABI_FP_UNKNOWN (-1) /* Unknown FP ABI (kernel internal) */
433 #define INIT_ARCH_ELF_STATE { \
434 .fp_abi = MIPS_ABI_FP_UNKNOWN, \
435 .interp_fp_abi = MIPS_ABI_FP_UNKNOWN, \
436 .overall_fp_mode = -1, \
439 extern int arch_elf_pt_proc(void *ehdr, void *phdr, struct file *elf,
440 bool is_interp, struct arch_elf_state *state);
442 extern int arch_check_elf(void *ehdr, bool has_interpreter,
443 struct arch_elf_state *state);
445 extern void mips_set_personality_fp(struct arch_elf_state *state);
447 #endif /* _ASM_ELF_H */