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7f33b09c65
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.
76 lines
2.9 KiB
C
76 lines
2.9 KiB
C
/* Support for reading /etc/ld.so.cache files written by Linux ldconfig.
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Copyright (C) 2003-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<http://www.gnu.org/licenses/>. */
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#include <ldconfig.h>
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/* For now we only support the natural XLEN ABI length on all targets, so the
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only bits that need to go into ld.so.cache are the FLEG ABI length. */
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#if defined __riscv_float_abi_double
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# define _DL_CACHE_DEFAULT_ID (FLAG_RISCV_FLOAT_ABI_DOUBLE | FLAG_ELF_LIBC6)
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#else
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# define _DL_CACHE_DEFAULT_ID (FLAG_RISCV_FLOAT_ABI_SOFT | FLAG_ELF_LIBC6)
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#endif
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#define _dl_cache_check_flags(flags) \
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((flags) == _DL_CACHE_DEFAULT_ID)
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/* If given a path to one of our library directories, adds every library
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directory via add_dir (), otherwise just adds the giver directory. On
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RISC-V, libraries can be found in paths ending in:
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- /lib64/lp64d
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- /lib64/lp64
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- /lib (only ld.so)
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so this will add all of those paths.
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According to Joseph Myers:
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My reasoning for that would be: generic autoconf-configured (etc.)
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software may only know about using the lib directory, so you want the
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lib directory to be searched regardless of the ABI - but it's also
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useful to be able to e.g. list /usr/local/lib in /etc/ld.so.conf for all
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architectures and have that automatically imply /usr/local/lib64/lp64d
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etc. so that libraries can be found that come from software that does
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use the ABI-specific directories. */
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#define add_system_dir(dir) \
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do \
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{ \
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size_t len = strlen (dir); \
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char path[len + 9]; \
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memcpy (path, dir, len + 1); \
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if (len >= 12 && ! memcmp(path + len - 12, "/lib64/lp64d", 12)) \
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{ \
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len -= 8; \
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path[len] = '\0'; \
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} \
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if (len >= 11 && ! memcmp(path + len - 11, "/lib64/lp64", 11)) \
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{ \
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len -= 7; \
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path[len] = '\0'; \
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} \
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add_dir (path); \
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if (len >= 4 && ! memcmp(path + len - 4, "/lib", 4)) \
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{ \
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memcpy (path + len, "64/lp64d", 9); \
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add_dir (path); \
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memcpy (path + len, "64/lp64", 8); \
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add_dir (path); \
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} \
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} while (0)
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#include_next <dl-cache.h>
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