Merge tag 'pinctrl-v5.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
[platform/kernel/linux-starfive.git] / arch / x86 / um / elfcore.c
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
10 Elf32_Half elf_core_extra_phdrs(void)
11 {
12         return vsyscall_ehdr ? (((struct elfhdr *)vsyscall_ehdr)->e_phnum) : 0;
13 }
14
15 int 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
42 int 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
63 size_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 }