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 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
  44 int 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
  69 size_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 }