| /* Support for reading ELF files. |
| Copyright (C) 1999-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| |
| int process_elf32_file (const char *file_name, const char *lib, int *flag, |
| unsigned int *osversion, char **soname, |
| void *file_contents, size_t file_length); |
| int process_elf64_file (const char *file_name, const char *lib, int *flag, |
| unsigned int *osversion, char **soname, |
| void *file_contents, size_t file_length); |
| |
| /* The ELF flags supported by our current glibc port: |
| - EF_RISCV_FLOAT_ABI: We support the soft and double ABIs. |
| - EF_RISCV_RVC: While the Linux ABI mandates the presence of the C |
| extension, we can still support libraries compiled without that extension |
| so we just ignore this flag. |
| - EF_RISCV_RVE: glibc (and Linux) don't support RV32E based systems. |
| - EF_RISCV_TSO: The TSO extension isn't supported, as doing so would require |
| some mechanism to ensure that the TSO extension is enabled which doesn't |
| currently exist. */ |
| #define SUPPORTED_ELF_FLAGS (EF_RISCV_FLOAT_ABI | EF_RISCV_RVC) |
| |
| /* Returns 0 if everything is ok, != 0 in case of error. */ |
| int |
| process_elf_file (const char *file_name, const char *lib, int *flag, |
| unsigned int *osversion, char **soname, void *file_contents, |
| size_t file_length) |
| { |
| ElfW(Ehdr) *elf_header = (ElfW(Ehdr) *) file_contents; |
| Elf32_Ehdr *elf32_header = (Elf32_Ehdr *) elf_header; |
| Elf64_Ehdr *elf64_header = (Elf64_Ehdr *) elf_header; |
| int ret; |
| long flags; |
| |
| /* RISC-V libraries are always libc.so.6+. */ |
| *flag = FLAG_ELF_LIBC6; |
| |
| if (elf_header->e_ident [EI_CLASS] == ELFCLASS32) |
| { |
| ret = process_elf32_file (file_name, lib, flag, osversion, soname, |
| file_contents, file_length); |
| flags = elf32_header->e_flags; |
| } |
| else |
| { |
| ret = process_elf64_file (file_name, lib, flag, osversion, soname, |
| file_contents, file_length); |
| flags = elf64_header->e_flags; |
| } |
| |
| /* RISC-V linkers encode the floating point ABI as part of the ELF headers. */ |
| switch (flags & EF_RISCV_FLOAT_ABI) |
| { |
| case EF_RISCV_FLOAT_ABI_SOFT: |
| *flag |= FLAG_RISCV_FLOAT_ABI_SOFT; |
| break; |
| case EF_RISCV_FLOAT_ABI_DOUBLE: |
| *flag |= FLAG_RISCV_FLOAT_ABI_DOUBLE; |
| break; |
| default: |
| return 1; |
| } |
| |
| /* If there are any other ELF flags set then glibc doesn't support this |
| library. */ |
| if (flags & ~SUPPORTED_ELF_FLAGS) |
| return 1; |
| |
| return ret; |
| } |
| |
| #undef __ELF_NATIVE_CLASS |
| #undef process_elf_file |
| #define process_elf_file process_elf32_file |
| #define __ELF_NATIVE_CLASS 32 |
| #include "elf/readelflib.c" |
| |
| #undef __ELF_NATIVE_CLASS |
| #undef process_elf_file |
| #define process_elf_file process_elf64_file |
| #define __ELF_NATIVE_CLASS 64 |
| #include "elf/readelflib.c" |