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
11Elf32_Half elf_core_extra_phdrs(struct coredump_params *cprm)
12{
13	return vsyscall_ehdr ? (((struct elfhdr *)vsyscall_ehdr)->e_phnum) : 0;
14}
15
16int 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
43int 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
64size_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}

 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}