arch/x86/um/elfcore.c

   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
   9 Elf32_Half elf_core_extra_phdrs(void)
  10 {
  11         return vsyscall_ehdr ? (((struct elfhdr *)vsyscall_ehdr)->e_phnum) : 0;
  12 }
  13
  14 int elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset)
  15 {
  16         if ( vsyscall_ehdr ) {
  17                 const struct elfhdr *const ehdrp =
  18                         (struct elfhdr *) vsyscall_ehdr;
  19                 const struct elf_phdr *const phdrp =
  20                         (const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff);
  21                 int i;
  22                 Elf32_Off ofs = 0;
  23
  24                 for (i = 0; i < ehdrp->e_phnum; ++i) {
  25                         struct elf_phdr phdr = phdrp[i];
  26
  27                         if (phdr.p_type == PT_LOAD) {
  28                                 ofs = phdr.p_offset = offset;
  29                                 offset += phdr.p_filesz;
  30                         } else {
  31                                 phdr.p_offset += ofs;
  32                         }
  33                         phdr.p_paddr = 0; /* match other core phdrs */
  34                         if (!dump_emit(cprm, &phdr, sizeof(phdr)))
  35                                 return 0;
  36                 }
  37         }
  38         return 1;
  39 }
  40
  41 int elf_core_write_extra_data(struct file *file, size_t *size,
  42                               unsigned long limit)
  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
  56                                 *size += filesz;
  57                                 if (*size > limit
  58                                     || !dump_write(file, addr, filesz))
  59                                         return 0;
  60                         }
  61                 }
  62         }
  63         return 1;
  64 }
  65
  66 size_t elf_core_extra_data_size(void)
  67 {
  68         if ( vsyscall_ehdr ) {
  69                 const struct elfhdr *const ehdrp =
  70                         (struct elfhdr *)vsyscall_ehdr;
  71                 const struct elf_phdr *const phdrp =
  72                         (const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff);
  73                 int i;
  74
  75                 for (i = 0; i < ehdrp->e_phnum; ++i)
  76                         if (phdrp[i].p_type == PT_LOAD)
  77                                 return (size_t) phdrp[i].p_filesz;
  78         }
  79         return 0;
  80 }