LXR linux/arch/x86/um/elfcore.c

   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
  10Elf32_Half elf_core_extra_phdrs(void)
  11{
  12        return vsyscall_ehdr ? (((struct elfhdr *)vsyscall_ehdr)->e_phnum) : 0;
  13}
  14
  15int 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
  42int 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
  63size_t elf_core_extra_data_size(void)
  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