root/arch/ia64/kernel/elfcore.c

DEFINITIONS

1. elf_core_extra_phdrs
2. elf_core_write_extra_phdrs
3. elf_core_write_extra_data
4. elf_core_extra_data_size

   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 Elf64_Half elf_core_extra_phdrs(void)
  11 {
  12         return GATE_EHDR->e_phnum;
  13 }
  14 
  15 int elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset)
  16 {
  17         const struct elf_phdr *const gate_phdrs =
  18                 (const struct elf_phdr *) (GATE_ADDR + GATE_EHDR->e_phoff);
  19         int i;
  20         Elf64_Off ofs = 0;
  21 
  22         for (i = 0; i < GATE_EHDR->e_phnum; ++i) {
  23                 struct elf_phdr phdr = gate_phdrs[i];
  24 
  25                 if (phdr.p_type == PT_LOAD) {
  26                         phdr.p_memsz = PAGE_ALIGN(phdr.p_memsz);
  27                         phdr.p_filesz = phdr.p_memsz;
  28                         if (ofs == 0) {
  29                                 ofs = phdr.p_offset = offset;
  30                                 offset += phdr.p_filesz;
  31                         } else {
  32                                 phdr.p_offset = ofs;
  33                         }
  34                 } else {
  35                         phdr.p_offset += ofs;
  36                 }
  37                 phdr.p_paddr = 0; /* match other core phdrs */
  38                 if (!dump_emit(cprm, &phdr, sizeof(phdr)))
  39                         return 0;
  40         }
  41         return 1;
  42 }
  43 
  44 int elf_core_write_extra_data(struct coredump_params *cprm)
  45 {
  46         const struct elf_phdr *const gate_phdrs =
  47                 (const struct elf_phdr *) (GATE_ADDR + GATE_EHDR->e_phoff);
  48         int i;
  49 
  50         for (i = 0; i < GATE_EHDR->e_phnum; ++i) {
  51                 if (gate_phdrs[i].p_type == PT_LOAD) {
  52                         void *addr = (void *)gate_phdrs[i].p_vaddr;
  53                         size_t memsz = PAGE_ALIGN(gate_phdrs[i].p_memsz);
  54 
  55                         if (!dump_emit(cprm, addr, memsz))
  56                                 return 0;
  57                         break;
  58                 }
  59         }
  60         return 1;
  61 }
  62 
  63 size_t elf_core_extra_data_size(void)
  64 {
  65         const struct elf_phdr *const gate_phdrs =
  66                 (const struct elf_phdr *) (GATE_ADDR + GATE_EHDR->e_phoff);
  67         int i;
  68         size_t size = 0;
  69 
  70         for (i = 0; i < GATE_EHDR->e_phnum; ++i) {
  71                 if (gate_phdrs[i].p_type == PT_LOAD) {
  72                         size += PAGE_ALIGN(gate_phdrs[i].p_memsz);
  73                         break;
  74                 }
  75         }
  76         return size;
  77 }