diff options
Diffstat (limited to 'ext/libelf/elf_flag.c')
| -rw-r--r-- | ext/libelf/elf_flag.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/ext/libelf/elf_flag.c b/ext/libelf/elf_flag.c new file mode 100644 index 000000000..234964b07 --- /dev/null +++ b/ext/libelf/elf_flag.c @@ -0,0 +1,162 @@ +/*- + * Copyright (c) 2006 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 "libelf.h" + +#include "_libelf.h" + +unsigned int +elf_flagdata(Elf_Data *d, Elf_Cmd c, unsigned int flags) +{ + Elf *e; + Elf_Scn *scn; + unsigned int r; + + if (d == NULL) + return (0); + + if ((c != ELF_C_SET && c != ELF_C_CLR) || (scn = d->d_scn) == NULL || + (e = scn->s_elf) == NULL || e->e_kind != ELF_K_ELF || + (flags & ~ELF_F_DIRTY) != 0) { + LIBELF_SET_ERROR(ARGUMENT, 0); + return (0); + } + + if (c == ELF_C_SET) + r = scn->s_flags |= flags; + else + r = scn->s_flags &= ~flags; + + return (r); +} + +unsigned int +elf_flagehdr(Elf *e, Elf_Cmd c, unsigned int flags) +{ + int ec; + void *ehdr; + + if (e == NULL) + return (0); + + if ((c != ELF_C_SET && c != ELF_C_CLR) || + (e->e_kind != ELF_K_ELF) || (flags & ~ELF_F_DIRTY) != 0 || + ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) { + LIBELF_SET_ERROR(ARGUMENT, 0); + return (0); + } + + if (ec == ELFCLASS32) + ehdr = e->e_u.e_elf.e_ehdr.e_ehdr32; + else + ehdr = e->e_u.e_elf.e_ehdr.e_ehdr64; + + if (ehdr == NULL) { + LIBELF_SET_ERROR(SEQUENCE, 0); + return (0); + } + + return (elf_flagelf(e, c, flags)); +} + +unsigned int +elf_flagelf(Elf *e, Elf_Cmd c, unsigned int flags) +{ + int r; + + if (e == NULL) + return (0); + + if ((c != ELF_C_SET && c != ELF_C_CLR) || + (e->e_kind != ELF_K_ELF) || + (flags & ~(ELF_F_DIRTY|ELF_F_LAYOUT)) != 0) { + LIBELF_SET_ERROR(ARGUMENT, 0); + return (0); + } + + if (c == ELF_C_SET) + r = e->e_flags |= flags; + else + r = e->e_flags &= ~flags; + return (r); +} + +unsigned int +elf_flagphdr(Elf *e, Elf_Cmd c, unsigned int flags) +{ + int ec; + void *phdr; + + if (e == NULL) + return (0); + + if ((c != ELF_C_SET && c != ELF_C_CLR) || + (e->e_kind != ELF_K_ELF) || (flags & ~ELF_F_DIRTY) != 0 || + ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) { + LIBELF_SET_ERROR(ARGUMENT, 0); + return (0); + } + + if (ec == ELFCLASS32) + phdr = e->e_u.e_elf.e_phdr.e_phdr32; + else + phdr = e->e_u.e_elf.e_phdr.e_phdr64; + + if (phdr == NULL) { + LIBELF_SET_ERROR(SEQUENCE, 0); + return (0); + } + + return (elf_flagelf(e, c, flags)); +} + +unsigned int +elf_flagscn(Elf_Scn *s, Elf_Cmd c, unsigned int flags) +{ + int r; + + if (s == NULL) + return (0); + + if ((c != ELF_C_SET && c != ELF_C_CLR) || + (flags & ~ELF_F_DIRTY) != 0) { + LIBELF_SET_ERROR(ARGUMENT, 0); + return (0); + } + + if (c == ELF_C_SET) + r = s->s_flags |= flags; + else + r = s->s_flags &= ~flags; + return (r); +} + +unsigned int +elf_flagshdr(Elf_Scn *s, Elf_Cmd c, unsigned int flags) +{ + return (elf_flagscn(s, c, flags)); +} |