1// Copyright 2018 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5//go:build linux && (386 || arm)
6
7package runtime
8
9// ELF32 structure definitions for use by the vDSO loader
10
11type elfSym struct {
12	st_name  uint32
13	st_value uint32
14	st_size  uint32
15	st_info  byte
16	st_other byte
17	st_shndx uint16
18}
19
20type elfVerdef struct {
21	vd_version uint16 /* Version revision */
22	vd_flags   uint16 /* Version information */
23	vd_ndx     uint16 /* Version Index */
24	vd_cnt     uint16 /* Number of associated aux entries */
25	vd_hash    uint32 /* Version name hash value */
26	vd_aux     uint32 /* Offset in bytes to verdaux array */
27	vd_next    uint32 /* Offset in bytes to next verdef entry */
28}
29
30type elfEhdr struct {
31	e_ident     [_EI_NIDENT]byte /* Magic number and other info */
32	e_type      uint16           /* Object file type */
33	e_machine   uint16           /* Architecture */
34	e_version   uint32           /* Object file version */
35	e_entry     uint32           /* Entry point virtual address */
36	e_phoff     uint32           /* Program header table file offset */
37	e_shoff     uint32           /* Section header table file offset */
38	e_flags     uint32           /* Processor-specific flags */
39	e_ehsize    uint16           /* ELF header size in bytes */
40	e_phentsize uint16           /* Program header table entry size */
41	e_phnum     uint16           /* Program header table entry count */
42	e_shentsize uint16           /* Section header table entry size */
43	e_shnum     uint16           /* Section header table entry count */
44	e_shstrndx  uint16           /* Section header string table index */
45}
46
47type elfPhdr struct {
48	p_type   uint32 /* Segment type */
49	p_offset uint32 /* Segment file offset */
50	p_vaddr  uint32 /* Segment virtual address */
51	p_paddr  uint32 /* Segment physical address */
52	p_filesz uint32 /* Segment size in file */
53	p_memsz  uint32 /* Segment size in memory */
54	p_flags  uint32 /* Segment flags */
55	p_align  uint32 /* Segment alignment */
56}
57
58type elfShdr struct {
59	sh_name      uint32 /* Section name (string tbl index) */
60	sh_type      uint32 /* Section type */
61	sh_flags     uint32 /* Section flags */
62	sh_addr      uint32 /* Section virtual addr at execution */
63	sh_offset    uint32 /* Section file offset */
64	sh_size      uint32 /* Section size in bytes */
65	sh_link      uint32 /* Link to another section */
66	sh_info      uint32 /* Additional section information */
67	sh_addralign uint32 /* Section alignment */
68	sh_entsize   uint32 /* Entry size if section holds table */
69}
70
71type elfDyn struct {
72	d_tag int32  /* Dynamic entry type */
73	d_val uint32 /* Integer value */
74}
75
76type elfVerdaux struct {
77	vda_name uint32 /* Version or dependency names */
78	vda_next uint32 /* Offset in bytes to next verdaux entry */
79}
80