diff options
Diffstat (limited to 'backends/sparc_symbol.c')
| -rw-r--r-- | backends/sparc_symbol.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/backends/sparc_symbol.c b/backends/sparc_symbol.c new file mode 100644 index 00000000..7896e9f4 --- /dev/null +++ b/backends/sparc_symbol.c @@ -0,0 +1,145 @@ +/* SPARC specific symbolic name handling. + Copyright (C) 2002, 2003, 2005, 2007, 2008 Red Hat, Inc. + This file is part of Red Hat elfutils. + Written by Jakub Jelinek <jakub@redhat.com>, 2002. + + Red Hat elfutils is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by the + Free Software Foundation; version 2 of the License. + + Red Hat elfutils is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License along + with Red Hat elfutils; if not, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. + + Red Hat elfutils is an included package of the Open Invention Network. + An included package of the Open Invention Network is a package for which + Open Invention Network licensees cross-license their patents. No patent + license is granted, either expressly or impliedly, by designation as an + included package. Should you wish to participate in the Open Invention + Network licensing program, please visit www.openinventionnetwork.com + <http://www.openinventionnetwork.com>. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <elf.h> +#include <stddef.h> + +#define BACKEND sparc_ +#include "libebl_CPU.h" + +/* Check for the simple reloc types. */ +Elf_Type +sparc_reloc_simple_type (Ebl *ebl __attribute__ ((unused)), int type) +{ + switch (type) + { + case R_SPARC_8: + return ELF_T_BYTE; + case R_SPARC_16: + case R_SPARC_UA16: + return ELF_T_HALF; + case R_SPARC_32: + case R_SPARC_UA32: + return ELF_T_WORD; + case R_SPARC_64: + case R_SPARC_UA64: + return ELF_T_XWORD; + default: + return ELF_T_NUM; + } +} + +/* Check whether machine flags are valid. */ +bool +sparc_machine_flag_check (GElf_Word flags) +{ + return ((flags &~ (EF_SPARCV9_MM + | EF_SPARC_LEDATA + | EF_SPARC_32PLUS + | EF_SPARC_SUN_US1 + | EF_SPARC_SUN_US3)) == 0); +} + +bool +sparc_check_special_section (Ebl *ebl, + int ndx __attribute__ ((unused)), + const GElf_Shdr *shdr, + const char *sname __attribute__ ((unused))) +{ + if ((shdr->sh_flags & (SHF_WRITE | SHF_EXECINSTR)) + == (SHF_WRITE | SHF_EXECINSTR)) + { + /* This is ordinarily flagged, but is valid for a PLT on SPARC. + + Look for the SHT_DYNAMIC section and the DT_PLTGOT tag in it. + Its d_ptr should match the .plt section's sh_addr. */ + + Elf_Scn *scn = NULL; + while ((scn = elf_nextscn (ebl->elf, scn)) != NULL) + { + GElf_Shdr scn_shdr; + if (likely (gelf_getshdr (scn, &scn_shdr) != NULL) + && scn_shdr.sh_type == SHT_DYNAMIC + && scn_shdr.sh_entsize != 0) + { + Elf_Data *data = elf_getdata (scn, NULL); + if (data != NULL) + for (size_t i = 0; i < data->d_size / scn_shdr.sh_entsize; ++i) + { + GElf_Dyn dyn; + if (unlikely (gelf_getdyn (data, i, &dyn) == NULL)) + break; + if (dyn.d_tag == DT_PLTGOT) + return dyn.d_un.d_ptr == shdr->sh_addr; + } + break; + } + } + } + + return false; +} + +const char * +sparc_symbol_type_name (int type, + char *buf __attribute__ ((unused)), + size_t len __attribute__ ((unused))) +{ + switch (type) + { + case STT_SPARC_REGISTER: + return "SPARC_REGISTER"; + } + return NULL; +} + +const char * +sparc_dynamic_tag_name (int64_t tag, + char *buf __attribute__ ((unused)), + size_t len __attribute__ ((unused))) +{ + switch (tag) + { + case DT_SPARC_REGISTER: + return "SPARC_REGISTER"; + } + return NULL; +} + +bool +sparc_dynamic_tag_check (int64_t tag) +{ + switch (tag) + { + case DT_SPARC_REGISTER: + return true; + } + return false; +} |