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
elf_core_extra_phdrs(void)9 Elf32_Half elf_core_extra_phdrs(void)
10 {
11 return vsyscall_ehdr ? (((struct elfhdr *)vsyscall_ehdr)->e_phnum) : 0;
12 }
13
elf_core_write_extra_phdrs(struct file * file,loff_t offset,size_t * size,unsigned long limit)14 int elf_core_write_extra_phdrs(struct file *file, loff_t offset, size_t *size,
15 unsigned long limit)
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 *size += sizeof(phdr);
36 if (*size > limit
37 || !dump_write(file, &phdr, sizeof(phdr)))
38 return 0;
39 }
40 }
41 return 1;
42 }
43
elf_core_write_extra_data(struct file * file,size_t * size,unsigned long limit)44 int elf_core_write_extra_data(struct file *file, size_t *size,
45 unsigned long limit)
46 {
47 if ( vsyscall_ehdr ) {
48 const struct elfhdr *const ehdrp =
49 (struct elfhdr *) vsyscall_ehdr;
50 const struct elf_phdr *const phdrp =
51 (const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff);
52 int i;
53
54 for (i = 0; i < ehdrp->e_phnum; ++i) {
55 if (phdrp[i].p_type == PT_LOAD) {
56 void *addr = (void *) phdrp[i].p_vaddr;
57 size_t filesz = phdrp[i].p_filesz;
58
59 *size += filesz;
60 if (*size > limit
61 || !dump_write(file, addr, filesz))
62 return 0;
63 }
64 }
65 }
66 return 1;
67 }
68
elf_core_extra_data_size(void)69 size_t elf_core_extra_data_size(void)
70 {
71 if ( vsyscall_ehdr ) {
72 const struct elfhdr *const ehdrp =
73 (struct elfhdr *)vsyscall_ehdr;
74 const struct elf_phdr *const phdrp =
75 (const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff);
76 int i;
77
78 for (i = 0; i < ehdrp->e_phnum; ++i)
79 if (phdrp[i].p_type == PT_LOAD)
80 return (size_t) phdrp[i].p_filesz;
81 }
82 return 0;
83 }
84