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

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