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 9Elf32_Half elf_core_extra_phdrs(void) 10{ 11 return vsyscall_ehdr ? (((struct elfhdr *)vsyscall_ehdr)->e_phnum) : 0; 12} 13 14int 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 44int 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 69size_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