1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef _UAPI_LINUX_ELF_H
3#define _UAPI_LINUX_ELF_H
4
5#include <linux/types.h>
6#include <linux/elf-em.h>
7
8/* 32-bit ELF base types. */
9typedef __u32 Elf32_Addr;
10typedef __u16 Elf32_Half;
11typedef __u32 Elf32_Off;
12typedef __s32 Elf32_Sword;
13typedef __u32 Elf32_Word;
14
15/* 64-bit ELF base types. */
16typedef __u64 Elf64_Addr;
17typedef __u16 Elf64_Half;
18typedef __s16 Elf64_SHalf;
19typedef __u64 Elf64_Off;
20typedef __s32 Elf64_Sword;
21typedef __u32 Elf64_Word;
22typedef __u64 Elf64_Xword;
23typedef __s64 Elf64_Sxword;
24
25/* These constants are for the segment types stored in the image headers */
26#define PT_NULL 0
27#define PT_LOAD 1
28#define PT_DYNAMIC 2
29#define PT_INTERP 3
30#define PT_NOTE 4
31#define PT_SHLIB 5
32#define PT_PHDR 6
33#define PT_TLS 7 /* Thread local storage segment */
34#define PT_LOOS 0x60000000 /* OS-specific */
35#define PT_HIOS 0x6fffffff /* OS-specific */
36#define PT_LOPROC 0x70000000
37#define PT_HIPROC 0x7fffffff
38#define PT_GNU_EH_FRAME 0x6474e550
39
40#define PT_GNU_STACK (PT_LOOS + 0x474e551)
41
42/*
43 * Extended Numbering
44 *
45 * If the real number of program header table entries is larger than
46 * or equal to PN_XNUM(0xffff), it is set to sh_info field of the
47 * section header at index 0, and PN_XNUM is set to e_phnum
48 * field. Otherwise, the section header at index 0 is zero
49 * initialized, if it exists.
50 *
51 * Specifications are available in:
52 *
53 * - Oracle: Linker and Libraries.
54 * Part No: 817–1984–19, August 2011.
55 * http://docs.oracle.com/cd/E18752_01/pdf/817-1984.pdf
56 *
57 * - System V ABI AMD64 Architecture Processor Supplement
58 * Draft Version 0.99.4,
59 * January 13, 2010.
60 * http://www.cs.washington.edu/education/courses/cse351/12wi/supp-docs/abi.pdf
61 */
62#define PN_XNUM 0xffff
63
64/* These constants define the different elf file types */
65#define ET_NONE 0
66#define ET_REL 1
67#define ET_EXEC 2
68#define ET_DYN 3
69#define ET_CORE 4
70#define ET_LOPROC 0xff00
71#define ET_HIPROC 0xffff
72
73/* This is the info that is needed to parse the dynamic section of the file */
74#define DT_NULL 0
75#define DT_NEEDED 1
76#define DT_PLTRELSZ 2
77#define DT_PLTGOT 3
78#define DT_HASH 4
79#define DT_STRTAB 5
80#define DT_SYMTAB 6
81#define DT_RELA 7
82#define DT_RELASZ 8
83#define DT_RELAENT 9
84#define DT_STRSZ 10
85#define DT_SYMENT 11
86#define DT_INIT 12
87#define DT_FINI 13
88#define DT_SONAME 14
89#define DT_RPATH 15
90#define DT_SYMBOLIC 16
91#define DT_REL 17
92#define DT_RELSZ 18
93#define DT_RELENT 19
94#define DT_PLTREL 20
95#define DT_DEBUG 21
96#define DT_TEXTREL 22
97#define DT_JMPREL 23
98#define DT_ENCODING 32
99#define OLD_DT_LOOS 0x60000000
100#define DT_LOOS 0x6000000d
101#define DT_HIOS 0x6ffff000
102#define DT_VALRNGLO 0x6ffffd00
103#define DT_VALRNGHI 0x6ffffdff
104#define DT_ADDRRNGLO 0x6ffffe00
105#define DT_ADDRRNGHI 0x6ffffeff
106#define DT_VERSYM 0x6ffffff0
107#define DT_RELACOUNT 0x6ffffff9
108#define DT_RELCOUNT 0x6ffffffa
109#define DT_FLAGS_1 0x6ffffffb
110#define DT_VERDEF 0x6ffffffc
111#define DT_VERDEFNUM 0x6ffffffd
112#define DT_VERNEED 0x6ffffffe
113#define DT_VERNEEDNUM 0x6fffffff
114#define OLD_DT_HIOS 0x6fffffff
115#define DT_LOPROC 0x70000000
116#define DT_HIPROC 0x7fffffff
117
118/* This info is needed when parsing the symbol table */
119#define STB_LOCAL 0
120#define STB_GLOBAL 1
121#define STB_WEAK 2
122
123#define STT_NOTYPE 0
124#define STT_OBJECT 1
125#define STT_FUNC 2
126#define STT_SECTION 3
127#define STT_FILE 4
128#define STT_COMMON 5
129#define STT_TLS 6
130
131#define ELF_ST_BIND(x) ((x) >> 4)
132#define ELF_ST_TYPE(x) (((unsigned int) x) & 0xf)
133#define ELF32_ST_BIND(x) ELF_ST_BIND(x)
134#define ELF32_ST_TYPE(x) ELF_ST_TYPE(x)
135#define ELF64_ST_BIND(x) ELF_ST_BIND(x)
136#define ELF64_ST_TYPE(x) ELF_ST_TYPE(x)
137
138typedef struct dynamic{
139 Elf32_Sword d_tag;
140 union{
141 Elf32_Sword d_val;
142 Elf32_Addr d_ptr;
143 } d_un;
144} Elf32_Dyn;
145
146typedef struct {
147 Elf64_Sxword d_tag; /* entry tag value */
148 union {
149 Elf64_Xword d_val;
150 Elf64_Addr d_ptr;
151 } d_un;
152} Elf64_Dyn;
153
154/* The following are used with relocations */
155#define ELF32_R_SYM(x) ((x) >> 8)
156#define ELF32_R_TYPE(x) ((x) & 0xff)
157
158#define ELF64_R_SYM(i) ((i) >> 32)
159#define ELF64_R_TYPE(i) ((i) & 0xffffffff)
160
161typedef struct elf32_rel {
162 Elf32_Addr r_offset;
163 Elf32_Word r_info;
164} Elf32_Rel;
165
166typedef struct elf64_rel {
167 Elf64_Addr r_offset; /* Location at which to apply the action */
168 Elf64_Xword r_info; /* index and type of relocation */
169} Elf64_Rel;
170
171typedef struct elf32_rela{
172 Elf32_Addr r_offset;
173 Elf32_Word r_info;
174 Elf32_Sword r_addend;
175} Elf32_Rela;
176
177typedef struct elf64_rela {
178 Elf64_Addr r_offset; /* Location at which to apply the action */
179 Elf64_Xword r_info; /* index and type of relocation */
180 Elf64_Sxword r_addend; /* Constant addend used to compute value */
181} Elf64_Rela;
182
183typedef struct elf32_sym{
184 Elf32_Word st_name;
185 Elf32_Addr st_value;
186 Elf32_Word st_size;
187 unsigned char st_info;
188 unsigned char st_other;
189 Elf32_Half st_shndx;
190} Elf32_Sym;
191
192typedef struct elf64_sym {
193 Elf64_Word st_name; /* Symbol name, index in string tbl */
194 unsigned char st_info; /* Type and binding attributes */
195 unsigned char st_other; /* No defined meaning, 0 */
196 Elf64_Half st_shndx; /* Associated section index */
197 Elf64_Addr st_value; /* Value of the symbol */
198 Elf64_Xword st_size; /* Associated symbol size */
199} Elf64_Sym;
200
201
202#define EI_NIDENT 16
203
204typedef struct elf32_hdr{
205 unsigned char e_ident[EI_NIDENT];
206 Elf32_Half e_type;
207 Elf32_Half e_machine;
208 Elf32_Word e_version;
209 Elf32_Addr e_entry; /* Entry point */
210 Elf32_Off e_phoff;
211 Elf32_Off e_shoff;
212 Elf32_Word e_flags;
213 Elf32_Half e_ehsize;
214 Elf32_Half e_phentsize;
215 Elf32_Half e_phnum;
216 Elf32_Half e_shentsize;
217 Elf32_Half e_shnum;
218 Elf32_Half e_shstrndx;
219} Elf32_Ehdr;
220
221typedef struct elf64_hdr {
222 unsigned char e_ident[EI_NIDENT]; /* ELF "magic number" */
223 Elf64_Half e_type;
224 Elf64_Half e_machine;
225 Elf64_Word e_version;
226 Elf64_Addr e_entry; /* Entry point virtual address */
227 Elf64_Off e_phoff; /* Program header table file offset */
228 Elf64_Off e_shoff; /* Section header table file offset */
229 Elf64_Word e_flags;
230 Elf64_Half e_ehsize;
231 Elf64_Half e_phentsize;
232 Elf64_Half e_phnum;
233 Elf64_Half e_shentsize;
234 Elf64_Half e_shnum;
235 Elf64_Half e_shstrndx;
236} Elf64_Ehdr;
237
238/* These constants define the permissions on sections in the program
239 header, p_flags. */
240#define PF_R 0x4
241#define PF_W 0x2
242#define PF_X 0x1
243
244typedef struct elf32_phdr{
245 Elf32_Word p_type;
246 Elf32_Off p_offset;
247 Elf32_Addr p_vaddr;
248 Elf32_Addr p_paddr;
249 Elf32_Word p_filesz;
250 Elf32_Word p_memsz;
251 Elf32_Word p_flags;
252 Elf32_Word p_align;
253} Elf32_Phdr;
254
255typedef struct elf64_phdr {
256 Elf64_Word p_type;
257 Elf64_Word p_flags;
258 Elf64_Off p_offset; /* Segment file offset */
259 Elf64_Addr p_vaddr; /* Segment virtual address */
260 Elf64_Addr p_paddr; /* Segment physical address */
261 Elf64_Xword p_filesz; /* Segment size in file */
262 Elf64_Xword p_memsz; /* Segment size in memory */
263 Elf64_Xword p_align; /* Segment alignment, file & memory */
264} Elf64_Phdr;
265
266/* sh_type */
267#define SHT_NULL 0
268#define SHT_PROGBITS 1
269#define SHT_SYMTAB 2
270#define SHT_STRTAB 3
271#define SHT_RELA 4
272#define SHT_HASH 5
273#define SHT_DYNAMIC 6
274#define SHT_NOTE 7
275#define SHT_NOBITS 8
276#define SHT_REL 9
277#define SHT_SHLIB 10
278#define SHT_DYNSYM 11
279#define SHT_NUM 12
280#define SHT_LOPROC 0x70000000
281#define SHT_HIPROC 0x7fffffff
282#define SHT_LOUSER 0x80000000
283#define SHT_HIUSER 0xffffffff
284
285/* sh_flags */
286#define SHF_WRITE 0x1
287#define SHF_ALLOC 0x2
288#define SHF_EXECINSTR 0x4
289#define SHF_RELA_LIVEPATCH 0x00100000
290#define SHF_RO_AFTER_INIT 0x00200000
291#define SHF_MASKPROC 0xf0000000
292
293/* special section indexes */
294#define SHN_UNDEF 0
295#define SHN_LORESERVE 0xff00
296#define SHN_LOPROC 0xff00
297#define SHN_HIPROC 0xff1f
298#define SHN_LIVEPATCH 0xff20
299#define SHN_ABS 0xfff1
300#define SHN_COMMON 0xfff2
301#define SHN_HIRESERVE 0xffff
302
303typedef struct elf32_shdr {
304 Elf32_Word sh_name;
305 Elf32_Word sh_type;
306 Elf32_Word sh_flags;
307 Elf32_Addr sh_addr;
308 Elf32_Off sh_offset;
309 Elf32_Word sh_size;
310 Elf32_Word sh_link;
311 Elf32_Word sh_info;
312 Elf32_Word sh_addralign;
313 Elf32_Word sh_entsize;
314} Elf32_Shdr;
315
316typedef struct elf64_shdr {
317 Elf64_Word sh_name; /* Section name, index in string tbl */
318 Elf64_Word sh_type; /* Type of section */
319 Elf64_Xword sh_flags; /* Miscellaneous section attributes */
320 Elf64_Addr sh_addr; /* Section virtual addr at execution */
321 Elf64_Off sh_offset; /* Section file offset */
322 Elf64_Xword sh_size; /* Size of section in bytes */
323 Elf64_Word sh_link; /* Index of another section */
324 Elf64_Word sh_info; /* Additional section information */
325 Elf64_Xword sh_addralign; /* Section alignment */
326 Elf64_Xword sh_entsize; /* Entry size if section holds table */
327} Elf64_Shdr;
328
329#define EI_MAG0 0 /* e_ident[] indexes */
330#define EI_MAG1 1
331#define EI_MAG2 2
332#define EI_MAG3 3
333#define EI_CLASS 4
334#define EI_DATA 5
335#define EI_VERSION 6
336#define EI_OSABI 7
337#define EI_PAD 8
338
339#define ELFMAG0 0x7f /* EI_MAG */
340#define ELFMAG1 'E'
341#define ELFMAG2 'L'
342#define ELFMAG3 'F'
343#define ELFMAG "\177ELF"
344#define SELFMAG 4
345
346#define ELFCLASSNONE 0 /* EI_CLASS */
347#define ELFCLASS32 1
348#define ELFCLASS64 2
349#define ELFCLASSNUM 3
350
351#define ELFDATANONE 0 /* e_ident[EI_DATA] */
352#define ELFDATA2LSB 1
353#define ELFDATA2MSB 2
354
355#define EV_NONE 0 /* e_version, EI_VERSION */
356#define EV_CURRENT 1
357#define EV_NUM 2
358
359#define ELFOSABI_NONE 0
360#define ELFOSABI_LINUX 3
361
362#ifndef ELF_OSABI
363#define ELF_OSABI ELFOSABI_NONE
364#endif
365
366/*
367 * Notes used in ET_CORE. Architectures export some of the arch register sets
368 * using the corresponding note types via the PTRACE_GETREGSET and
369 * PTRACE_SETREGSET requests.
370 */
371#define NT_PRSTATUS 1
372#define NT_PRFPREG 2
373#define NT_PRPSINFO 3
374#define NT_TASKSTRUCT 4
375#define NT_AUXV 6
376/*
377 * Note to userspace developers: size of NT_SIGINFO note may increase
378 * in the future to accomodate more fields, don't assume it is fixed!
379 */
380#define NT_SIGINFO 0x53494749
381#define NT_FILE 0x46494c45
382#define NT_PRXFPREG 0x46e62b7f /* copied from gdb5.1/include/elf/common.h */
383#define NT_PPC_VMX 0x100 /* PowerPC Altivec/VMX registers */
384#define NT_PPC_SPE 0x101 /* PowerPC SPE/EVR registers */
385#define NT_PPC_VSX 0x102 /* PowerPC VSX registers */
386#define NT_PPC_TAR 0x103 /* Target Address Register */
387#define NT_PPC_PPR 0x104 /* Program Priority Register */
388#define NT_PPC_DSCR 0x105 /* Data Stream Control Register */
389#define NT_PPC_EBB 0x106 /* Event Based Branch Registers */
390#define NT_PPC_PMU 0x107 /* Performance Monitor Registers */
391#define NT_PPC_TM_CGPR 0x108 /* TM checkpointed GPR Registers */
392#define NT_PPC_TM_CFPR 0x109 /* TM checkpointed FPR Registers */
393#define NT_PPC_TM_CVMX 0x10a /* TM checkpointed VMX Registers */
394#define NT_PPC_TM_CVSX 0x10b /* TM checkpointed VSX Registers */
395#define NT_PPC_TM_SPR 0x10c /* TM Special Purpose Registers */
396#define NT_PPC_TM_CTAR 0x10d /* TM checkpointed Target Address Register */
397#define NT_PPC_TM_CPPR 0x10e /* TM checkpointed Program Priority Register */
398#define NT_PPC_TM_CDSCR 0x10f /* TM checkpointed Data Stream Control Register */
399#define NT_PPC_PKEY 0x110 /* Memory Protection Keys registers */
400#define NT_386_TLS 0x200 /* i386 TLS slots (struct user_desc) */
401#define NT_386_IOPERM 0x201 /* x86 io permission bitmap (1=deny) */
402#define NT_X86_XSTATE 0x202 /* x86 extended state using xsave */
403#define NT_S390_HIGH_GPRS 0x300 /* s390 upper register halves */
404#define NT_S390_TIMER 0x301 /* s390 timer register */
405#define NT_S390_TODCMP 0x302 /* s390 TOD clock comparator register */
406#define NT_S390_TODPREG 0x303 /* s390 TOD programmable register */
407#define NT_S390_CTRS 0x304 /* s390 control registers */
408#define NT_S390_PREFIX 0x305 /* s390 prefix register */
409#define NT_S390_LAST_BREAK 0x306 /* s390 breaking event address */
410#define NT_S390_SYSTEM_CALL 0x307 /* s390 system call restart data */
411#define NT_S390_TDB 0x308 /* s390 transaction diagnostic block */
412#define NT_S390_VXRS_LOW 0x309 /* s390 vector registers 0-15 upper half */
413#define NT_S390_VXRS_HIGH 0x30a /* s390 vector registers 16-31 */
414#define NT_S390_GS_CB 0x30b /* s390 guarded storage registers */
415#define NT_S390_GS_BC 0x30c /* s390 guarded storage broadcast control block */
416#define NT_S390_RI_CB 0x30d /* s390 runtime instrumentation */
417#define NT_ARM_VFP 0x400 /* ARM VFP/NEON registers */
418#define NT_ARM_TLS 0x401 /* ARM TLS register */
419#define NT_ARM_HW_BREAK 0x402 /* ARM hardware breakpoint registers */
420#define NT_ARM_HW_WATCH 0x403 /* ARM hardware watchpoint registers */
421#define NT_ARM_SYSTEM_CALL 0x404 /* ARM system call number */
422#define NT_ARM_SVE 0x405 /* ARM Scalable Vector Extension registers */
423#define NT_ARM_PAC_MASK 0x406 /* ARM pointer authentication code masks */
424#define NT_ARM_PACA_KEYS 0x407 /* ARM pointer authentication address keys */
425#define NT_ARM_PACG_KEYS 0x408 /* ARM pointer authentication generic key */
426#define NT_ARC_V2 0x600 /* ARCv2 accumulator/extra registers */
427#define NT_VMCOREDD 0x700 /* Vmcore Device Dump Note */
428#define NT_MIPS_DSP 0x800 /* MIPS DSP ASE registers */
429#define NT_MIPS_FP_MODE 0x801 /* MIPS floating-point mode */
430#define NT_MIPS_MSA 0x802 /* MIPS SIMD registers */
431
432/* Note header in a PT_NOTE section */
433typedef struct elf32_note {
434 Elf32_Word n_namesz; /* Name size */
435 Elf32_Word n_descsz; /* Content size */
436 Elf32_Word n_type; /* Content type */
437} Elf32_Nhdr;
438
439/* Note header in a PT_NOTE section */
440typedef struct elf64_note {
441 Elf64_Word n_namesz; /* Name size */
442 Elf64_Word n_descsz; /* Content size */
443 Elf64_Word n_type; /* Content type */
444} Elf64_Nhdr;
445
446#endif /* _UAPI_LINUX_ELF_H */
447