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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
153typedef unsigned long elf_greg_t;
154typedef elf_greg_t elf_gregset_t[ELF_NGREG];
155
156typedef double elf_fpreg_t;
157typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
158
159void 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) \
241do { \
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) \
253do { \
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)
278extern 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
288extern 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 \
312do { \
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
318struct linux_binprm;
319extern int arch_setup_additional_pages(struct linux_binprm *bprm,
320 int uses_interp);
321
322struct 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
334extern int arch_elf_pt_proc(void *ehdr, void *phdr, struct file *elf,
335 bool is_interp, struct arch_elf_state *state);
336
337extern int arch_check_elf(void *ehdr, bool has_interpreter, void *interp_ehdr,
338 struct arch_elf_state *state);
339
340#endif /* _ASM_ELF_H */