xref: /openbmc/linux/arch/loongarch/include/asm/elf.h (revision 3ddc8b84)
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