| 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(struct coredump_params *cprm) |
| 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, addr: &phdr, nr: 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, nr: filesz)) |
| 56 | return 0; |
| 57 | } |
| 58 | } |
| 59 | } |
| 60 | return 1; |
| 61 | } |
| 62 | |
| 63 | size_t elf_core_extra_data_size(struct coredump_params *cprm) |
| 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 | } |
| 78 |