diff options
Diffstat (limited to 'lib/libelf/gelf_phdr.c')
| -rw-r--r-- | lib/libelf/gelf_phdr.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/lib/libelf/gelf_phdr.c b/lib/libelf/gelf_phdr.c new file mode 100644 index 00000000000..61a0f13d5fa --- /dev/null +++ b/lib/libelf/gelf_phdr.c @@ -0,0 +1,171 @@ +/*- + * Copyright (c) 2006,2008 Joseph Koshy + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <gelf.h> +#include <libelf.h> +#include <limits.h> +#include <stdint.h> + +#include "_libelf.h" + +ELFTC_VCSID("$Id: gelf_phdr.c,v 1.1 2019/02/01 05:27:38 jsg Exp $"); + +Elf32_Phdr * +elf32_getphdr(Elf *e) +{ + return (_libelf_getphdr(e, ELFCLASS32)); +} + +Elf64_Phdr * +elf64_getphdr(Elf *e) +{ + return (_libelf_getphdr(e, ELFCLASS64)); +} + +GElf_Phdr * +gelf_getphdr(Elf *e, int index, GElf_Phdr *d) +{ + int ec; + Elf32_Ehdr *eh32; + Elf64_Ehdr *eh64; + Elf32_Phdr *ep32; + Elf64_Phdr *ep64; + size_t phnum; + + if (d == NULL || e == NULL || + ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64) || + (e->e_kind != ELF_K_ELF) || index < 0 || + elf_getphdrnum(e, &phnum) < 0) { + LIBELF_SET_ERROR(ARGUMENT, 0); + return (NULL); + } + + if ((size_t)index >= phnum) { + LIBELF_SET_ERROR(ARGUMENT, 0); + return (NULL); + } + + if (ec == ELFCLASS32) { + if ((eh32 = _libelf_ehdr(e, ELFCLASS32, 0)) == NULL || + ((ep32 = _libelf_getphdr(e, ELFCLASS32)) == NULL)) + return (NULL); + + ep32 += index; + + d->p_type = ep32->p_type; + d->p_offset = ep32->p_offset; + d->p_vaddr = (Elf64_Addr) ep32->p_vaddr; + d->p_paddr = (Elf64_Addr) ep32->p_paddr; + d->p_filesz = (Elf64_Xword) ep32->p_filesz; + d->p_memsz = (Elf64_Xword) ep32->p_memsz; + d->p_flags = ep32->p_flags; + d->p_align = (Elf64_Xword) ep32->p_align; + + } else { + if ((eh64 = _libelf_ehdr(e, ELFCLASS64, 0)) == NULL || + (ep64 = _libelf_getphdr(e, ELFCLASS64)) == NULL) + return (NULL); + + ep64 += index; + + *d = *ep64; + } + + return (d); +} + +Elf32_Phdr * +elf32_newphdr(Elf *e, size_t count) +{ + return (_libelf_newphdr(e, ELFCLASS32, count)); +} + +Elf64_Phdr * +elf64_newphdr(Elf *e, size_t count) +{ + return (_libelf_newphdr(e, ELFCLASS64, count)); +} + +void * +gelf_newphdr(Elf *e, size_t count) +{ + if (e == NULL) { + LIBELF_SET_ERROR(ARGUMENT, 0); + return (NULL); + } + return (_libelf_newphdr(e, e->e_class, count)); +} + +int +gelf_update_phdr(Elf *e, int ndx, GElf_Phdr *s) +{ + int ec; + size_t phnum; + void *ehdr; + Elf32_Phdr *ph32; + Elf64_Phdr *ph64; + + if (s == NULL || e == NULL || e->e_kind != ELF_K_ELF || + ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64) || + elf_getphdrnum(e, &phnum) < 0) { + LIBELF_SET_ERROR(ARGUMENT, 0); + return (0); + } + + if (e->e_cmd == ELF_C_READ) { + LIBELF_SET_ERROR(MODE, 0); + return (0); + } + + if ((ehdr = _libelf_ehdr(e, ec, 0)) == NULL) + return (0); + + if (ndx < 0 || (size_t)ndx > phnum) { + LIBELF_SET_ERROR(ARGUMENT, 0); + return (0); + } + + (void) elf_flagphdr(e, ELF_C_SET, ELF_F_DIRTY); + + if (ec == ELFCLASS64) { + ph64 = e->e_u.e_elf.e_phdr.e_phdr64 + ndx; + *ph64 = *s; + return (1); + } + + ph32 = e->e_u.e_elf.e_phdr.e_phdr32 + ndx; + + ph32->p_type = s->p_type; + ph32->p_flags = s->p_flags; + LIBELF_COPY_U32(ph32, s, p_offset); + LIBELF_COPY_U32(ph32, s, p_vaddr); + LIBELF_COPY_U32(ph32, s, p_paddr); + LIBELF_COPY_U32(ph32, s, p_filesz); + LIBELF_COPY_U32(ph32, s, p_memsz); + LIBELF_COPY_U32(ph32, s, p_align); + + return (1); +} |