// SPDX-License-Identifier: GPL-2.0 #include <linux/elf.h> #include <linux/coredump.h> #include <linux/fs.h> #include <linux/mm.h> #include <asm/elf.h> Elf32_Half elf_core_extra_phdrs(void) { return vsyscall_ehdr ? (((struct elfhdr *)vsyscall_ehdr)->e_phnum) : 0; } int elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset) { if ( vsyscall_ehdr ) { const struct elfhdr *const ehdrp = (struct elfhdr *) vsyscall_ehdr; const struct elf_phdr *const phdrp = (const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff); int i; Elf32_Off ofs = 0; for (i = 0; i < ehdrp->e_phnum; ++i) { struct elf_phdr phdr = phdrp[i]; if (phdr.p_type == PT_LOAD) { ofs = phdr.p_offset = offset; offset += phdr.p_filesz; } else { phdr.p_offset += ofs; } phdr.p_paddr = 0; /* match other core phdrs */ if (!dump_emit(cprm, &phdr, sizeof(phdr))) return 0; } } return 1; } int elf_core_write_extra_data(struct coredump_params *cprm) { if ( vsyscall_ehdr ) { const struct elfhdr *const ehdrp = (struct elfhdr *) vsyscall_ehdr; const struct elf_phdr *const phdrp = (const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff); int i; for (i = 0; i < ehdrp->e_phnum; ++i) { if (phdrp[i].p_type == PT_LOAD) { void *addr = (void *) phdrp[i].p_vaddr; size_t filesz = phdrp[i].p_filesz; if (!dump_emit(cprm, addr, filesz)) return 0; } } } return 1; } size_t elf_core_extra_data_size(void) { if ( vsyscall_ehdr ) { const struct elfhdr *const ehdrp = (struct elfhdr *)vsyscall_ehdr; const struct elf_phdr *const phdrp = (const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff); int i; for (i = 0; i < ehdrp->e_phnum; ++i) if (phdrp[i].p_type == PT_LOAD) return (size_t) phdrp[i].p_filesz; } return 0; }