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author | Vincent Chen <vincent.chen@sifive.com> | 2020-12-15 17:16:39 +0800 |
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committer | DJ Delorie <dj@redhat.com> | 2021-01-10 21:25:13 -0500 |
commit | c31b1f52311e10a37b85604b43de81dff205637e (patch) | |
tree | ea5eb9390dd9bf0d39536e2d436e43e599f8dce9 /sysdeps/riscv/dl-irel.h | |
parent | 2cd361b5114ff3f2f55684458d8bf9836c624b90 (diff) | |
download | glibc-c31b1f52311e10a37b85604b43de81dff205637e.tar.gz glibc-c31b1f52311e10a37b85604b43de81dff205637e.tar.xz glibc-c31b1f52311e10a37b85604b43de81dff205637e.zip |
riscv: support GNU indirect function
Enable riscv glibc to support GNU indirect function
Diffstat (limited to 'sysdeps/riscv/dl-irel.h')
-rw-r--r-- | sysdeps/riscv/dl-irel.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/sysdeps/riscv/dl-irel.h b/sysdeps/riscv/dl-irel.h new file mode 100644 index 0000000000..cad9cc87b1 --- /dev/null +++ b/sysdeps/riscv/dl-irel.h @@ -0,0 +1,56 @@ +/* Machine-dependent ELF indirect relocation inline functions. + RISC-V version. + Copyright (C) 2020 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 + <https://www.gnu.org/licenses/>. */ + +#ifndef _DL_IREL_H +#define _DL_IREL_H + +#include <stdio.h> +#include <unistd.h> +#include <ldsodefs.h> +#include <sysdep.h> + +#define ELF_MACHINE_IRELA 1 + +static inline ElfW(Addr) +__attribute ((always_inline)) +elf_ifunc_invoke (ElfW(Addr) addr) +{ + /* The second argument is a void pointer to preserve the extension + fexibility. */ + return ((ElfW(Addr) (*) (uint64_t, void *)) (addr)) + (GLRO(dl_hwcap), NULL); +} + +static inline void +__attribute ((always_inline)) +elf_irela (const ElfW(Rela) *reloc) +{ + ElfW(Addr) *const reloc_addr = (void *) reloc->r_offset; + const unsigned long int r_type = ELFW(R_TYPE) (reloc->r_info); + + if (__glibc_likely (r_type == R_RISCV_IRELATIVE)) + { + ElfW(Addr) value = elf_ifunc_invoke (reloc->r_addend); + *reloc_addr = value; + } + else + __libc_fatal ("Unexpected reloc type in static binary.\n"); +} + +#endif |