1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/elf.h>
3 #include <linux/elfcore.h>
4 #include <linux/coredump.h>
5 #include <linux/fs.h>
6 #include <linux/mm.h>
7
8 #include <asm/elf.h>
9
10
11 Elf32_Half elf_core_extra_phdrs(struct coredump_params *cprm)
12 {
13 return vsyscall_ehdr ? (((struct elfhdr *)vsyscall_ehdr)->e_phnum) : 0;
14 }
15
16 int elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset)
17 {
18 if ( vsyscall_ehdr ) {
19 const struct elfhdr *const ehdrp =
20 (struct elfhdr *) vsyscall_ehdr;
21 const struct elf_phdr *const phdrp =
22 (const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff);
23 int i;
24 Elf32_Off ofs = 0;
25
26 for (i = 0; i < ehdrp->e_phnum; ++i) {
27 struct elf_phdr phdr = phdrp[i];
28
29 if (phdr.p_type == PT_LOAD) {
30 ofs = phdr.p_offset = offset;
31 offset += phdr.p_filesz;
32 } else {
33 phdr.p_offset += ofs;
34 }
35 phdr.p_paddr = 0; /* match other core phdrs */
36 if (!dump_emit(cprm, &phdr, sizeof(phdr)))
37 return 0;
38 }
39 }
40 return 1;
41 }
42
43 int elf_core_write_extra_data(struct coredump_params *cprm)
44 {
45 if ( vsyscall_ehdr ) {
46 const struct elfhdr *const ehdrp =
47 (struct elfhdr *) vsyscall_ehdr;
48 const struct elf_phdr *const phdrp =
49 (const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff);
50 int i;
51
52 for (i = 0; i < ehdrp->e_phnum; ++i) {
53 if (phdrp[i].p_type == PT_LOAD) {
54 void *addr = (void *) phdrp[i].p_vaddr;
55 size_t filesz = phdrp[i].p_filesz;
56 if (!dump_emit(cprm, addr, filesz))
57 return 0;
58 }
59 }
60 }
61 return 1;
62 }
63
64 size_t elf_core_extra_data_size(struct coredump_params *cprm)
65 {
66 if ( vsyscall_ehdr ) {
67 const struct elfhdr *const ehdrp =
68 (struct elfhdr *)vsyscall_ehdr;
69 const struct elf_phdr *const phdrp =
70 (const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff);
71 int i;
72
73 for (i = 0; i < ehdrp->e_phnum; ++i)
74 if (phdrp[i].p_type == PT_LOAD)
75 return (size_t) phdrp[i].p_filesz;
76 }
77 return 0;
78 }
79
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