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 Elf64_Half elf_core_extra_phdrs(void)
10 {
11 return GATE_EHDR->e_phnum;
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 const struct elf_phdr *const gate_phdrs =
18 (const struct elf_phdr *) (GATE_ADDR + GATE_EHDR->e_phoff);
19 int i;
20 Elf64_Off ofs = 0;
21
22 for (i = 0; i < GATE_EHDR->e_phnum; ++i) {
23 struct elf_phdr phdr = gate_phdrs[i];
24
25 if (phdr.p_type == PT_LOAD) {
26 phdr.p_memsz = PAGE_ALIGN(phdr.p_memsz);
27 phdr.p_filesz = phdr.p_memsz;
28 if (ofs == 0) {
29 ofs = phdr.p_offset = offset;
30 offset += phdr.p_filesz;
31 } else {
32 phdr.p_offset = ofs;
33 }
34 } else {
35 phdr.p_offset += ofs;
36 }
37 phdr.p_paddr = 0; /* match other core phdrs */
38 *size += sizeof(phdr);
39 if (*size > limit || !dump_write(file, &phdr, sizeof(phdr)))
40 return 0;
41 }
42 return 1;
43 }
44
elf_core_write_extra_data(struct file * file,size_t * size,unsigned long limit)45 int elf_core_write_extra_data(struct file *file, size_t *size,
46 unsigned long limit)
47 {
48 const struct elf_phdr *const gate_phdrs =
49 (const struct elf_phdr *) (GATE_ADDR + GATE_EHDR->e_phoff);
50 int i;
51
52 for (i = 0; i < GATE_EHDR->e_phnum; ++i) {
53 if (gate_phdrs[i].p_type == PT_LOAD) {
54 void *addr = (void *)gate_phdrs[i].p_vaddr;
55 size_t memsz = PAGE_ALIGN(gate_phdrs[i].p_memsz);
56
57 *size += memsz;
58 if (*size > limit || !dump_write(file, addr, memsz))
59 return 0;
60 break;
61 }
62 }
63 return 1;
64 }
65
elf_core_extra_data_size(void)66 size_t elf_core_extra_data_size(void)
67 {
68 const struct elf_phdr *const gate_phdrs =
69 (const struct elf_phdr *) (GATE_ADDR + GATE_EHDR->e_phoff);
70 int i;
71 size_t size = 0;
72
73 for (i = 0; i < GATE_EHDR->e_phnum; ++i) {
74 if (gate_phdrs[i].p_type == PT_LOAD) {
75 size += PAGE_ALIGN(gate_phdrs[i].p_memsz);
76 break;
77 }
78 }
79 return size;
80 }
81