1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
4 */
5 #ifndef _ASM_ELF_H
6 #define _ASM_ELF_H
7
8 #include <linux/auxvec.h>
9 #include <linux/fs.h>
10 #include <uapi/linux/elf.h>
11
12 #include <asm/current.h>
13 #include <asm/vdso.h>
14
15 /* The ABI of a file. */
16 #define EF_LOONGARCH_ABI_LP64_SOFT_FLOAT 0x1
17 #define EF_LOONGARCH_ABI_LP64_SINGLE_FLOAT 0x2
18 #define EF_LOONGARCH_ABI_LP64_DOUBLE_FLOAT 0x3
19
20 #define EF_LOONGARCH_ABI_ILP32_SOFT_FLOAT 0x5
21 #define EF_LOONGARCH_ABI_ILP32_SINGLE_FLOAT 0x6
22 #define EF_LOONGARCH_ABI_ILP32_DOUBLE_FLOAT 0x7
23
24 /* LoongArch relocation types used by the dynamic linker */
25 #define R_LARCH_NONE 0
26 #define R_LARCH_32 1
27 #define R_LARCH_64 2
28 #define R_LARCH_RELATIVE 3
29 #define R_LARCH_COPY 4
30 #define R_LARCH_JUMP_SLOT 5
31 #define R_LARCH_TLS_DTPMOD32 6
32 #define R_LARCH_TLS_DTPMOD64 7
33 #define R_LARCH_TLS_DTPREL32 8
34 #define R_LARCH_TLS_DTPREL64 9
35 #define R_LARCH_TLS_TPREL32 10
36 #define R_LARCH_TLS_TPREL64 11
37 #define R_LARCH_IRELATIVE 12
38 #define R_LARCH_MARK_LA 20
39 #define R_LARCH_MARK_PCREL 21
40 #define R_LARCH_SOP_PUSH_PCREL 22
41 #define R_LARCH_SOP_PUSH_ABSOLUTE 23
42 #define R_LARCH_SOP_PUSH_DUP 24
43 #define R_LARCH_SOP_PUSH_GPREL 25
44 #define R_LARCH_SOP_PUSH_TLS_TPREL 26
45 #define R_LARCH_SOP_PUSH_TLS_GOT 27
46 #define R_LARCH_SOP_PUSH_TLS_GD 28
47 #define R_LARCH_SOP_PUSH_PLT_PCREL 29
48 #define R_LARCH_SOP_ASSERT 30
49 #define R_LARCH_SOP_NOT 31
50 #define R_LARCH_SOP_SUB 32
51 #define R_LARCH_SOP_SL 33
52 #define R_LARCH_SOP_SR 34
53 #define R_LARCH_SOP_ADD 35
54 #define R_LARCH_SOP_AND 36
55 #define R_LARCH_SOP_IF_ELSE 37
56 #define R_LARCH_SOP_POP_32_S_10_5 38
57 #define R_LARCH_SOP_POP_32_U_10_12 39
58 #define R_LARCH_SOP_POP_32_S_10_12 40
59 #define R_LARCH_SOP_POP_32_S_10_16 41
60 #define R_LARCH_SOP_POP_32_S_10_16_S2 42
61 #define R_LARCH_SOP_POP_32_S_5_20 43
62 #define R_LARCH_SOP_POP_32_S_0_5_10_16_S2 44
63 #define R_LARCH_SOP_POP_32_S_0_10_10_16_S2 45
64 #define R_LARCH_SOP_POP_32_U 46
65 #define R_LARCH_ADD8 47
66 #define R_LARCH_ADD16 48
67 #define R_LARCH_ADD24 49
68 #define R_LARCH_ADD32 50
69 #define R_LARCH_ADD64 51
70 #define R_LARCH_SUB8 52
71 #define R_LARCH_SUB16 53
72 #define R_LARCH_SUB24 54
73 #define R_LARCH_SUB32 55
74 #define R_LARCH_SUB64 56
75 #define R_LARCH_GNU_VTINHERIT 57
76 #define R_LARCH_GNU_VTENTRY 58
77 #define R_LARCH_B16 64
78 #define R_LARCH_B21 65
79 #define R_LARCH_B26 66
80 #define R_LARCH_ABS_HI20 67
81 #define R_LARCH_ABS_LO12 68
82 #define R_LARCH_ABS64_LO20 69
83 #define R_LARCH_ABS64_HI12 70
84 #define R_LARCH_PCALA_HI20 71
85 #define R_LARCH_PCALA_LO12 72
86 #define R_LARCH_PCALA64_LO20 73
87 #define R_LARCH_PCALA64_HI12 74
88 #define R_LARCH_GOT_PC_HI20 75
89 #define R_LARCH_GOT_PC_LO12 76
90 #define R_LARCH_GOT64_PC_LO20 77
91 #define R_LARCH_GOT64_PC_HI12 78
92 #define R_LARCH_GOT_HI20 79
93 #define R_LARCH_GOT_LO12 80
94 #define R_LARCH_GOT64_LO20 81
95 #define R_LARCH_GOT64_HI12 82
96 #define R_LARCH_TLS_LE_HI20 83
97 #define R_LARCH_TLS_LE_LO12 84
98 #define R_LARCH_TLS_LE64_LO20 85
99 #define R_LARCH_TLS_LE64_HI12 86
100 #define R_LARCH_TLS_IE_PC_HI20 87
101 #define R_LARCH_TLS_IE_PC_LO12 88
102 #define R_LARCH_TLS_IE64_PC_LO20 89
103 #define R_LARCH_TLS_IE64_PC_HI12 90
104 #define R_LARCH_TLS_IE_HI20 91
105 #define R_LARCH_TLS_IE_LO12 92
106 #define R_LARCH_TLS_IE64_LO20 93
107 #define R_LARCH_TLS_IE64_HI12 94
108 #define R_LARCH_TLS_LD_PC_HI20 95
109 #define R_LARCH_TLS_LD_HI20 96
110 #define R_LARCH_TLS_GD_PC_HI20 97
111 #define R_LARCH_TLS_GD_HI20 98
112 #define R_LARCH_32_PCREL 99
113 #define R_LARCH_RELAX 100
114 #define R_LARCH_DELETE 101
115 #define R_LARCH_ALIGN 102
116 #define R_LARCH_PCREL20_S2 103
117 #define R_LARCH_CFA 104
118 #define R_LARCH_ADD6 105
119 #define R_LARCH_SUB6 106
120 #define R_LARCH_ADD_ULEB128 107
121 #define R_LARCH_SUB_ULEB128 108
122 #define R_LARCH_64_PCREL 109
123
124 #ifndef ELF_ARCH
125
126 /* ELF register definitions */
127
128 /*
129 * General purpose have the following registers:
130 * Register Number
131 * GPRs 32
132 * ORIG_A0 1
133 * ERA 1
134 * BADVADDR 1
135 * CRMD 1
136 * PRMD 1
137 * EUEN 1
138 * ECFG 1
139 * ESTAT 1
140 * Reserved 5
141 */
142 #define ELF_NGREG 45
143
144 /*
145 * Floating point have the following registers:
146 * Register Number
147 * FPR 32
148 * FCC 1
149 * FCSR 1
150 */
151 #define ELF_NFPREG 34
152
153 typedef unsigned long elf_greg_t;
154 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
155
156 typedef double elf_fpreg_t;
157 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
158
159 void loongarch_dump_regs64(u64 *uregs, const struct pt_regs *regs);
160
161 #ifdef CONFIG_32BIT
162 /*
163 * This is used to ensure we don't load something for the wrong architecture.
164 */
165 #define elf_check_arch elf32_check_arch
166
167 /*
168 * These are used to set parameters in the core dumps.
169 */
170 #define ELF_CLASS ELFCLASS32
171
172 #define ELF_CORE_COPY_REGS(dest, regs) \
173 loongarch_dump_regs32((u32 *)&(dest), (regs));
174
175 #endif /* CONFIG_32BIT */
176
177 #ifdef CONFIG_64BIT
178 /*
179 * This is used to ensure we don't load something for the wrong architecture.
180 */
181 #define elf_check_arch elf64_check_arch
182
183 /*
184 * These are used to set parameters in the core dumps.
185 */
186 #define ELF_CLASS ELFCLASS64
187
188 #define ELF_CORE_COPY_REGS(dest, regs) \
189 loongarch_dump_regs64((u64 *)&(dest), (regs));
190
191 #endif /* CONFIG_64BIT */
192
193 /*
194 * These are used to set parameters in the core dumps.
195 */
196 #define ELF_DATA ELFDATA2LSB
197 #define ELF_ARCH EM_LOONGARCH
198
199 #endif /* !defined(ELF_ARCH) */
200
201 #define loongarch_elf_check_machine(x) ((x)->e_machine == EM_LOONGARCH)
202
203 #define vmcore_elf32_check_arch loongarch_elf_check_machine
204 #define vmcore_elf64_check_arch loongarch_elf_check_machine
205
206 /*
207 * Return non-zero if HDR identifies an 32bit ELF binary.
208 */
209 #define elf32_check_arch(hdr) \
210 ({ \
211 int __res = 1; \
212 struct elfhdr *__h = (hdr); \
213 \
214 if (!loongarch_elf_check_machine(__h)) \
215 __res = 0; \
216 if (__h->e_ident[EI_CLASS] != ELFCLASS32) \
217 __res = 0; \
218 \
219 __res; \
220 })
221
222 /*
223 * Return non-zero if HDR identifies an 64bit ELF binary.
224 */
225 #define elf64_check_arch(hdr) \
226 ({ \
227 int __res = 1; \
228 struct elfhdr *__h = (hdr); \
229 \
230 if (!loongarch_elf_check_machine(__h)) \
231 __res = 0; \
232 if (__h->e_ident[EI_CLASS] != ELFCLASS64) \
233 __res = 0; \
234 \
235 __res; \
236 })
237
238 #ifdef CONFIG_32BIT
239
240 #define SET_PERSONALITY2(ex, state) \
241 do { \
242 current->thread.vdso = &vdso_info; \
243 \
244 if (personality(current->personality) != PER_LINUX) \
245 set_personality(PER_LINUX); \
246 } while (0)
247
248 #endif /* CONFIG_32BIT */
249
250 #ifdef CONFIG_64BIT
251
252 #define SET_PERSONALITY2(ex, state) \
253 do { \
254 unsigned int p; \
255 \
256 clear_thread_flag(TIF_32BIT_REGS); \
257 clear_thread_flag(TIF_32BIT_ADDR); \
258 \
259 current->thread.vdso = &vdso_info; \
260 \
261 p = personality(current->personality); \
262 if (p != PER_LINUX32 && p != PER_LINUX) \
263 set_personality(PER_LINUX); \
264 } while (0)
265
266 #endif /* CONFIG_64BIT */
267
268 #define CORE_DUMP_USE_REGSET
269 #define ELF_EXEC_PAGESIZE PAGE_SIZE
270
271 /*
272 * This yields a mask that user programs can use to figure out what
273 * instruction set this cpu supports. This could be done in userspace,
274 * but it's not easy, and we've already done it here.
275 */
276
277 #define ELF_HWCAP (elf_hwcap)
278 extern unsigned int elf_hwcap;
279 #include <asm/hwcap.h>
280
281 /*
282 * This yields a string that ld.so will use to load implementation
283 * specific libraries for optimization. This is more specific in
284 * intent than poking at uname or /proc/cpuinfo.
285 */
286
287 #define ELF_PLATFORM __elf_platform
288 extern const char *__elf_platform;
289
290 #define ELF_PLAT_INIT(_r, load_addr) do { \
291 _r->regs[1] = _r->regs[2] = _r->regs[3] = _r->regs[4] = 0; \
292 _r->regs[5] = _r->regs[6] = _r->regs[7] = _r->regs[8] = 0; \
293 _r->regs[9] = _r->regs[10] /* syscall n */ = _r->regs[12] = 0; \
294 _r->regs[13] = _r->regs[14] = _r->regs[15] = _r->regs[16] = 0; \
295 _r->regs[17] = _r->regs[18] = _r->regs[19] = _r->regs[20] = 0; \
296 _r->regs[21] = _r->regs[22] = _r->regs[23] = _r->regs[24] = 0; \
297 _r->regs[25] = _r->regs[26] = _r->regs[27] = _r->regs[28] = 0; \
298 _r->regs[29] = _r->regs[30] = _r->regs[31] = 0; \
299 } while (0)
300
301 /*
302 * This is the location that an ET_DYN program is loaded if exec'ed. Typical
303 * use of this is to invoke "./ld.so someprog" to test out a new version of
304 * the loader. We need to make sure that it is out of the way of the program
305 * that it will "exec", and that there is sufficient room for the brk.
306 */
307
308 #define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2)
309
310 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
311 #define ARCH_DLINFO \
312 do { \
313 NEW_AUX_ENT(AT_SYSINFO_EHDR, \
314 (unsigned long)current->mm->context.vdso); \
315 } while (0)
316
317 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
318 struct linux_binprm;
319 extern int arch_setup_additional_pages(struct linux_binprm *bprm,
320 int uses_interp);
321
322 struct arch_elf_state {
323 int fp_abi;
324 int interp_fp_abi;
325 };
326
327 #define LOONGARCH_ABI_FP_ANY (0)
328
329 #define INIT_ARCH_ELF_STATE { \
330 .fp_abi = LOONGARCH_ABI_FP_ANY, \
331 .interp_fp_abi = LOONGARCH_ABI_FP_ANY, \
332 }
333
334 extern int arch_elf_pt_proc(void *ehdr, void *phdr, struct file *elf,
335 bool is_interp, struct arch_elf_state *state);
336
337 extern int arch_check_elf(void *ehdr, bool has_interpreter, void *interp_ehdr,
338 struct arch_elf_state *state);
339
340 #endif /* _ASM_ELF_H */
341
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