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#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}