diff options
Diffstat (limited to 'lib/libelf/gelf_syminfo.c')
| -rw-r--r-- | lib/libelf/gelf_syminfo.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/lib/libelf/gelf_syminfo.c b/lib/libelf/gelf_syminfo.c new file mode 100644 index 00000000000..529e861f66b --- /dev/null +++ b/lib/libelf/gelf_syminfo.c @@ -0,0 +1,152 @@ +/*- + * 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 <assert.h> +#include <gelf.h> + +#include "_libelf.h" + +ELFTC_VCSID("$Id: gelf_syminfo.c,v 1.1 2019/02/01 05:27:38 jsg Exp $"); + +GElf_Syminfo * +gelf_getsyminfo(Elf_Data *ed, int ndx, GElf_Syminfo *dst) +{ + int ec; + Elf *e; + size_t msz; + Elf_Scn *scn; + uint32_t sh_type; + struct _Libelf_Data *d; + Elf32_Syminfo *syminfo32; + Elf64_Syminfo *syminfo64; + + d = (struct _Libelf_Data *) ed; + + if (d == NULL || ndx < 0 || dst == NULL || + (scn = d->d_scn) == NULL || + (e = scn->s_elf) == NULL) { + LIBELF_SET_ERROR(ARGUMENT, 0); + return (NULL); + } + + ec = e->e_class; + assert(ec == ELFCLASS32 || ec == ELFCLASS64); + + if (ec == ELFCLASS32) + sh_type = scn->s_shdr.s_shdr32.sh_type; + else + sh_type = scn->s_shdr.s_shdr64.sh_type; + + if (_libelf_xlate_shtype(sh_type) != ELF_T_SYMINFO) { + LIBELF_SET_ERROR(ARGUMENT, 0); + return (NULL); + } + + msz = _libelf_msize(ELF_T_SYMINFO, ec, e->e_version); + + assert(msz > 0); + assert(ndx >= 0); + + if (msz * (size_t) ndx >= d->d_data.d_size) { + LIBELF_SET_ERROR(ARGUMENT, 0); + return (NULL); + } + + if (ec == ELFCLASS32) { + + syminfo32 = (Elf32_Syminfo *) d->d_data.d_buf + ndx; + + dst->si_boundto = syminfo32->si_boundto; + dst->si_flags = syminfo32->si_flags; + + } else { + + syminfo64 = (Elf64_Syminfo *) d->d_data.d_buf + ndx; + + *dst = *syminfo64; + } + + return (dst); +} + +int +gelf_update_syminfo(Elf_Data *ed, int ndx, GElf_Syminfo *gs) +{ + int ec; + Elf *e; + size_t msz; + Elf_Scn *scn; + uint32_t sh_type; + struct _Libelf_Data *d; + Elf32_Syminfo *syminfo32; + Elf64_Syminfo *syminfo64; + + d = (struct _Libelf_Data *) ed; + + if (d == NULL || ndx < 0 || gs == NULL || + (scn = d->d_scn) == NULL || + (e = scn->s_elf) == NULL) { + LIBELF_SET_ERROR(ARGUMENT, 0); + return (0); + } + + ec = e->e_class; + assert(ec == ELFCLASS32 || ec == ELFCLASS64); + + if (ec == ELFCLASS32) + sh_type = scn->s_shdr.s_shdr32.sh_type; + else + sh_type = scn->s_shdr.s_shdr64.sh_type; + + if (_libelf_xlate_shtype(sh_type) != ELF_T_SYMINFO) { + LIBELF_SET_ERROR(ARGUMENT, 0); + return (0); + } + + msz = _libelf_msize(ELF_T_SYMINFO, ec, e->e_version); + + assert(msz > 0); + assert(ndx >= 0); + + if (msz * (size_t) ndx >= d->d_data.d_size) { + LIBELF_SET_ERROR(ARGUMENT, 0); + return (0); + } + + if (ec == ELFCLASS32) { + syminfo32 = (Elf32_Syminfo *) d->d_data.d_buf + ndx; + + syminfo32->si_boundto = gs->si_boundto; + syminfo32->si_flags = gs->si_flags; + + } else { + syminfo64 = (Elf64_Syminfo *) d->d_data.d_buf + ndx; + + *syminfo64 = *gs; + } + + return (1); +} |