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, &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(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