lib/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2025-07-28 00:21:52 +03:00
Code Activity

RISC-V: Linux ABI

Browse Source 
Linux-specific code that is required for maintaining ABI compatibility.
This doesn't contain the actual system call interface, that is split out
in order to avoid having a patch that's too big.

2018-01-29  Palmer Dabbelt  <palmer@sifive.com>

        * sysdeps/riscv/nptl/pthread-offsets.h: New file.
        * sysdeps/riscv/nptl/pthreaddef.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/bits/fcntl.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/bits/mman.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/bits/sigcontext.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/dl-cache.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/flush-icache.c: Likewise.
        * sysdeps/unix/sysv/linux/riscv/getcontext.S: Likewise.
        * sysdeps/unix/sysv/linux/riscv/init-first.c: Likewise.
        * sysdeps/unix/sysv/linux/riscv/libc-vdso.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/makecontext.c: Likewise.
        * sysdeps/unix/sysv/linux/riscv/readelflib.c: Likewise.
        * sysdeps/unix/sysv/linux/riscv/register-dump.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/setcontext.S: Likewise.
        * sysdeps/unix/sysv/linux/riscv/sigcontextinfo.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/swapcontext.S: Likewise.
        * sysdeps/unix/sysv/linux/riscv/sys/cachectl.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/sys/procfs.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/sys/ucontext.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/sys/user.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/ucontext-macros.h: Likewise.
        * sysdeps/unix/sysv/linux/riscv/ucontext_i.sym: Likewise.
This commit is contained in:
Palmer Dabbelt
2018-01-29 10:28:32 -08:00
parent 36960f0c76
commit 7f33b09c65
24 changed files with 1445 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

75
sysdeps/unix/sysv/linux/riscv/dl-cache.h Normal file
View File

@ -0,0 +1,75 @@
/* Support for reading /etc/ld.so.cache files written by Linux ldconfig.
Copyright (C) 2003-2018 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/>. */
#include <ldconfig.h>
/* For now we only support the natural XLEN ABI length on all targets, so the
only bits that need to go into ld.so.cache are the FLEG ABI length. */
#if defined __riscv_float_abi_double
# define _DL_CACHE_DEFAULT_ID (FLAG_RISCV_FLOAT_ABI_DOUBLE | FLAG_ELF_LIBC6)
#else
# define _DL_CACHE_DEFAULT_ID (FLAG_RISCV_FLOAT_ABI_SOFT | FLAG_ELF_LIBC6)
#endif
#define _dl_cache_check_flags(flags) \
((flags) == _DL_CACHE_DEFAULT_ID)
/* If given a path to one of our library directories, adds every library
directory via add_dir (), otherwise just adds the giver directory. On
RISC-V, libraries can be found in paths ending in:
- /lib64/lp64d
- /lib64/lp64
- /lib (only ld.so)
so this will add all of those paths.
According to Joseph Myers:
My reasoning for that would be: generic autoconf-configured (etc.)
software may only know about using the lib directory, so you want the
lib directory to be searched regardless of the ABI - but it's also
useful to be able to e.g. list /usr/local/lib in /etc/ld.so.conf for all
architectures and have that automatically imply /usr/local/lib64/lp64d
etc. so that libraries can be found that come from software that does
use the ABI-specific directories. */
#define add_system_dir(dir) \
do \
{ \
size_t len = strlen (dir); \
char path[len + 9]; \
memcpy (path, dir, len + 1); \
if (len >= 12 && ! memcmp(path + len - 12, "/lib64/lp64d", 12)) \
{ \
len -= 8; \
path[len] = '\0'; \
} \
if (len >= 11 && ! memcmp(path + len - 11, "/lib64/lp64", 11)) \
{ \
len -= 7; \
path[len] = '\0'; \
} \
add_dir (path); \
if (len >= 4 && ! memcmp(path + len - 4, "/lib", 4)) \
{ \
memcpy (path + len, "64/lp64d", 9); \
add_dir (path); \
memcpy (path + len, "64/lp64", 8); \
add_dir (path); \
} \
} while (0)
#include_next <dl-cache.h>