-# Copyright (C) 1991, 92, 93, 94, 95, 96 Free Software Foundation, Inc.
+# Copyright (C) 1991-2020 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 Library General Public License as
-# published by the Free Software Foundation; either version 2 of the
-# License, or (at your option) any later version.
+# 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
-# Library General Public License for more details.
+# Lesser General Public License for more details.
-# You should have received a copy of the GNU Library General Public
-# License along with the GNU C Library; see the file COPYING.LIB. If
-# not, write to the Free Software Foundation, Inc., 675 Mass Ave,
-# Cambridge, MA 02139, USA.
+# 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/>.
-# The unix-specific configure fragment writes `unix-generated' in config.make.
-config-generated := $(config-generated) $(unix-generated)
-\f
-ifeq (,$(filter-out $(sysdep_dir)/stub/ $(common-objpfx),\
- $(dir $(firstword $(wildcard $(+sysdep_dirs:%=%/local_lim.h))))))
-
-ifneq (,$(wildcard $(sysincludedir)/sys/param.h))
-local_lim-CFLAGS := $(local_lim-CFLAGS) -DHAVE_SYS_PARAM_H
-endif
-ifneq (,$(wildcard $(sysincludedir)/sys/limits.h))
-local_lim-CFLAGS := $(local_lim-CFLAGS) -DHAVE_SYS_LIMITS_H
-endif
-ifneq (,$(wildcard $(sysincludedir)/limits.h))
-local_lim-CFLAGS := $(local_lim-CFLAGS) -DHAVE_LIMITS_H
-endif
-
-$(common-objpfx)local_lim.h: $(common-objpfx)mk-local_lim
- if $(dir $<)$(notdir $<) > $@-t; then mv $@-t $@; else XXX; fi
-$(common-objpfx)mk-local_lim: $(sysdep_dir)/unix/mk-local_lim.c
- cwd=`pwd`; cd $(@D); \
- $(BUILD_CC) $(BUILD_CFLAGS) $(local_lim-CFLAGS) $$cwd/$< -o $(@F)
-
-before-compile := $(before-compile) $(common-objpfx)local_lim.h
-common-generated := $(common-generated) local_lim.h mk-local_lim
-
-endif
-\f
-ifeq (,$(filter-out $(sysdep_dir)/stub/ $(common-objpfx),\
- $(patsubst %/sys/param.h,%/,\
- $(firstword $(wildcard $(+sysdep_dirs:%=%/sys/param.h))))))
-
-before-compile := $(before-compile) $(common-objpfx)sys/param.h
-
-$(common-objpfx)sys/param.h: $(sysincludedir)/sys/param.h
- -mkdir $(@D:%/=%)
- (echo '#ifndef _GNU_SYS_PARAM_H'; \
- echo '#define _GNU_SYS_PARAM_H 1'; \
- echo '#include <endian.h>'; \
- awk < $< \
- '/^#define[ ]*NULL/ { print "#ifndef NULL"; \
- print $$0; \
- print "#endif"; \
- was_null = 1 } \
- { if (!was_null) print $$0; \
- was_null = 0 }'; \
- echo '#ifndef MAXHOSTNAMELEN'; \
- echo '#define MAXHOSTNAMELEN 64 /* XXX */'; \
- echo '#endif /* No MAXHOSTNAMELEN. */'; \
- echo '#endif /* sys/param.h */') > $@-tmp
- mv $@-tmp $@
-
-$(common-objpfx)param.h.c: $(sysincludedir)/sys/param.h
- rm -f $@
- cp $< $@
-$(common-objpfx)param.h.dep: $(common-objpfx)param.h.c \
- $(sysdep_dir)/unix/Makefile
- $(+mkdep) -I$(sysincludedir) $< \
- | sed > $@ \
- -e 's@^.*:@@' \
- -e 's@$<@@g' \
- -e 's@$(sysincludedir)/*@@g' \
- -e 's@\\$$@@' \
- -e 's@^@sys/param.h-includes := $$(sys/param.h-includes) @'
-
-# Get the generated definition of sys/param.h-includes.
-ifndef no_deps
-include $(common-objpfx)param.h.dep
-endif
-
-# Don't preempt our own headers.
-sys/param.h-includes := \
- $(filter-out $(patsubst $(..)%,%,\
- $(wildcard $(addprefix $(..),\
- $(sys/param.h-includes)))),\
- $(sys/param.h-includes))
-
-
-.PHONY: sys/param.h-includes
-sys/param.h-includes: $(addprefix $(common-objpfx),$(sys/param.h-includes))
-
-ifdef sys/param.h-includes
-# Copy the system files to $(common-objdir).
-$(addprefix $(common-objpfx),$(sys/param.h-includes)): $(common-objpfx)%: \
- $(sysincludedir)/%
- -mkdir $(@D:%/=%)
-# Some of these files sometimes contain conflicting declarations for htons,
-# ntohs, etc. They also often contain definitions of *_ENDIAN and
-# BYTE_ORDER, which we define ourselves in <endian.h>.
- sed -e '/[ ]*[hn]to[nh][sl][ (]*/d' \
- -e '/^#define[ ]*[A-Z]*_ENDIAN/d' \
- -e '/^#define[ ]*BYTE_ORDER/d' \
- $< > $@-t
- mv $@-t $@
-endif
-
-common-generated := $(common-generated) \
- sys/param.h $(sys/param.h-includes) param.h.c param.h.dep
-
-
-ifeq ($(subdir),misc)
-
-# Install system headers the system sys/param.h uses.
-
-sysdep_headers := $(sysdep_headers) $(sys/param.h-includes)
-
-endif # misc
-
-endif # No sysdep sys/param.h.
-\f
-ifeq (,$(filter-out $(sysdep_dir)/stub/ $(common-objpfx),\
- $(dir $(firstword $(wildcard $(+sysdep_dirs:%=%/errnos.h))))))
-
-# These need to exist before any compiling is done,
-# so cpp doesn't instead find the stub versions.
-before-compile := $(before-compile) $(common-objpfx)errnos.h
-
-$(common-objpfx)errnos.h: $(common-objpfx)make-errnos
- $(dir $<)$(notdir $<) > $@-tmp
- mv $@-tmp $@
-
-$(common-objpfx)make-errnos: $(common-objpfx)make-errnos.c
- $(common-objdir-compile)
-
-$(common-objpfx)make-errnos.c: $(sysdep_dir)/unix/errnos-tmpl.c \
- $(sysdep_dir)/unix/errnos.awk $(common-objpfx)errnos
- awk -f $(word 2,$^) errnos="`tr '\012' ' ' < $(word 3,$^)`" $< > $@T
- mv $@T $@
-
-$(common-objpfx)errnos: $(wildcard $(sysincludedir)/errno.h \
- $(sysincludedir)/sys/errno.h)
- cat $^ | sed -n 's/^#define[ ]*\(E[A-Z0-9][A-Z0-9]*\)[ ].*$$/\1/p' > $@-tmp
- mv $@-tmp $@
-
-common-generated := $(common-generated) \
- errnos.h errnos make-errnos make-errnos.c
-endif
-\f
-ifeq (,$(filter-out $(sysdep_dir)/stub/ $(common-objpfx),\
- $(dir $(firstword $(wildcard $(+sysdep_dirs:%=%/ioctls.h))))))
-
-before-compile := $(before-compile) $(common-objpfx)ioctls.h
-
-$(common-objpfx)ioctls.h: $(common-objpfx)make-ioctls
- $(dir $<)$(notdir $<) > $@-tmp
- mv $@-tmp $@
-
-ioctl-includes := sys/termios.h net/nit.h
-ioctl-includes := $(wildcard $(addprefix $(sysincludedir)/,$(ioctl-includes)))
-make-ioctls-CFLAGS := $(subst /,_,$(subst .,_,\
- $(patsubst $(sysincludedir)/%,-DHAVE_%,\
- $(ioctl-includes))))
-
-$(common-objpfx)make-ioctls: $(common-objpfx)make-ioctls.c
- cd $(@D); $(BUILD_CC) $(BUILD_CFLAGS) $(make-ioctls-CFLAGS) \
- $(<:$(common-objpfx)%=%) -o $(@F)
-
-$(common-objpfx)make-ioctls.c: $(sysdep_dir)/unix/ioctls-tmpl.c \
- $(sysdep_dir)/unix/ioctls.awk \
- $(common-objpfx)ioctls
- awk -f $(word 2,$^) requests="`cat $(word 3,$^)`" $< > $@T
- mv $@T $@
-
-
-termbits.h := $(firstword $(wildcard $(+sysdep_dirs:%=%/termbits.h)))
-ifeq ($(termbits.h),$(sysdep_dir)/generic/termbits.h)
-termbits.h := # Ignore the generic version.
-endif
-
-# If there is a system-specific <termbits.h> file, we want to omit all the
-# symbols it defines from ioctls. Otherwise, both ioctls.h and termbits.h
-# would define them. The system-specific <termbits.h> file presumably
-# defines them with the same values as we find from the system's headers.
-# We also want to omit from ioctls the symbols defined in our own
-# <sys/ttydefaults.h>, to avoid multiple definition conflicts. We use
-# snarf-ioctls on these files to find what symbols we want to omit. fgrep
-# -xv gives all lines which do not match in their entirety; without -x,
-# CSTOP's presence elided TIOCSTOP.
-
-$(common-objpfx)ioctls: $(sysdep_dir)/unix/snarf-ioctls \
- $(sysincludedir)/sys/ioctl.h $(ioctl-includes)
- $(dir $<)$(notdir $<) $(filter-out $<,$^) \
- | fgrep -xv "`($(dir $<)$(notdir $<) $(termbits.h) \
- $(..)termios/sys/ttydefaults.h; \
- echo NULL) \
- | sort | uniq`" \
- | sort | uniq | tr '\012' ' ' > $@-tmp
- mv $@-tmp $@
-
-common-generated := $(common-generated) \
- ioctls.h ioctls make-ioctls make-ioctls.c
-endif
-\f
-ifeq ($(subdir),stdio-common)
-ifeq (,$(filter-out $(sysdep_dir)/stub/ $(objpfx),\
- $(dir $(firstword $(wildcard $(+sysdep_dirs:%=%/errlist.c))))))
-
-before-compile: $(objpfx)errlist.c
-$(objpfx)errlist.c: $(objpfx)make_errlist
- @rm -f $@
- $(dir $<)$(notdir $<) > $@-tmp
- mv $@-tmp $@
-
-$(objpfx)make_errlist: $(sysdep_dir)/unix/make_errlist.c
- $(native-compile)
-
-generated := $(generated) make_errlist errlist.c
-
-endif
-endif # stdio-common
-\f
-ifeq (,$(filter-out $(sysdep_dir)/stub/ $(common-objpfx),\
- $(dir $(firstword $(wildcard $(+sysdep_dirs:%=%/syscall.h))))))
-
-# The syscall code assumes a file <syscall.h> that defines macros
-# `SYS_call' for syscall `call'. Variations on this I have seen include:
-# it's in <sys/syscall.h>;
-# it's in <sys.s>;
-# it defines `CALL' instead of `SYS_call'.
-# Irix has a <syscall.h> which is not what we want, so check for <sys.s> first.
-
-# Find a file that might have these. NOTE: This list of possibilities is
-# repeated in sysdeps/unix/configure and the two should be kept in sync.
-syscall.h := $(firstword $(wildcard $(addprefix $(sysincludedir)/, \
- sys.s sys/sys.s \
- sys.S sys/sys.S \
- syscall.h sys/syscall.h \
- )))
-ifdef syscall.h
-
-# Transmogrify any of several formats of the file into the one we want.
-$(common-objpfx)syscall.h: $(syscall.h)
- tr '[A-Z]' '[a-z]' < $< | \
- sed -e 's/[ ]sys_/ /' \
- -e 's/^#define[ ]*\([a-z0-9_]*\)[ ]*/#define SYS_\1 /' \
- -e 's/[ ]sys_/ SYS_/' \
- -e 's/SYS_syscall_basenum/syscall_basenum/g' \
- -e 's/SYS_kerncall_basenum/kerncall_basenum/g' \
- -e 's/SYS_sysvoffset/sysvoffset/g' \
- -e '/^#/!d' \
- -e '/^#ident/d' \
- -e 's-\(/\*[^*]*\)$$-\1\*/-' \
- > $@-tmp
- mv $@-tmp $@
-
-before-compile := $(before-compile) $(common-objpfx)syscall.h
-common-generated := $(common-generated) syscall.h
-
-endif
-
-endif
-\f
ifndef inhibit-unix-syscalls
# Sysdep dirs unix/... can contain a file syscalls.list,
# which specifies objects to be compiled as simple Unix system calls.
-include $(common-objpfx)sysd-syscalls
-omit-deps += $(unix-syscalls)
ifeq (misc,$(subdir))
sysdep_routines += $(unix-extra-syscalls)
+
+ifdef unix-stub-syscalls
+# The system call entry points in this list are supposed to be additional
+# functions not overriding any other sysdeps/.../call.c implementation, but
+# their system call numbers are unavailable in the kernel headers we're
+# using. Instead of a system call stub, these get a function that fails
+# with ENOSYS. We just generate a single module defining one function and
+# making all these entry point names aliases for it.
+sysdep_routines += stub-syscalls
+$(objpfx)stub-syscalls.c: $(common-objpfx)sysd-syscalls \
+ $(..)sysdeps/unix/Makefile
+ $(make-target-directory)
+ (for call in $(unix-stub-syscalls); do \
+ call=$${call%%@*}; \
+ echo "#define $$call RENAMED_$$call"; \
+ done; \
+ echo '#include <errno.h>'; \
+ echo '#include <shlib-compat.h>'; \
+ for call in $(unix-stub-syscalls); do \
+ call=$${call%%@*}; \
+ echo "#undef $$call"; \
+ done; \
+ echo 'long int _no_syscall (void)'; \
+ echo '{ __set_errno (ENOSYS); return -1L; }'; \
+ for call in $(unix-stub-syscalls); do \
+ case $$call in \
+ *@@*) \
+ ver=$${call##*@}; call=$${call%%@*}; \
+ ver=`echo "$$ver" | sed 's/\./_/g'`; \
+ echo "strong_alias (_no_syscall, __$${call}_$${ver})"; \
+ echo "versioned_symbol (libc, __$${call}_$${ver}, $$call, $$ver);"\
+ ;; \
+ *@*) \
+ ver=$${call##*@}; call=$${call%%@*}; \
+ ver=`echo "$$ver" | sed 's/\./_/g'`; \
+ case $$ver in \
+ *:*) \
+ compat_ver=$${ver#*:}; \
+ ver=$${ver%%:*}; \
+ compat_cond="SHLIB_COMPAT (libc, $$ver, $$compat_ver)"; \
+ ;; \
+ *) \
+ compat_cond=""; \
+ ;; \
+ esac; \
+ if [ -n "$$compat_cond" ]; then echo "#if $$compat_cond"; fi; \
+ echo "strong_alias (_no_syscall, __$${call}_$${ver})"; \
+ echo "compat_symbol (libc, __$${call}_$${ver}, $$call, $$ver);"; \
+ if [ -n "$$compat_cond" ]; then echo "#endif"; fi; \
+ ;; \
+ *) echo "weak_alias (_no_syscall, $$call)"; \
+ echo "stub_warning ($$call)"; \
+ echo "weak_alias (_no_syscall, __GI_$$call)" ;; \
+ esac; \
+ done) > $@T
+ mv -f $@T $@
+generated += stub-syscalls.c
+endif
endif
-export sysdirs
-export asm_CPP := $(COMPILE.S) -E -x assembler-with-cpp
+# This is the end of the pipeline for compiling the syscall stubs.
+# The stdin is assembler with cpp using sysdep.h macros.
+compile-syscall = $(COMPILE.S) -o $@ -x assembler-with-cpp - \
+ $(compile-mkdep-flags)
+ifndef avoid-generated
$(common-objpfx)sysd-syscalls: $(..)sysdeps/unix/make-syscalls.sh \
- $(wildcard $(+sysdep_dirs:%=%/syscalls.list))
+ $(wildcard $(+sysdep_dirs:%=%/syscalls.list)) \
+ $(common-objpfx)libc-modules.stmp
for dir in $(+sysdep_dirs); do \
test -f $$dir/syscalls.list && \
- { $(SHELL) $(dir $<)$(notdir $<) \
- $$dir $(object-suffixes) || exit 1; }; \
- test $$dir = sysdeps/unix && break; \
+ { sysdirs='$(sysdirs)' \
+ asm_CPP='$(COMPILE.S) -E -x assembler-with-cpp' \
+ $(SHELL) $(dir $<)$(notdir $<) $$dir || exit 1; }; \
+ test $$dir = $(..)sysdeps/unix && break; \
done > $@T
mv -f $@T $@
-
-# This syscall objects depend on s-proto.d, which is generated to
-# specify dependencies generated syscalls with have on headers.
-ifdef subdir
-ifndef no_deps
-# These deps use file names relative to a subdir, so don't
-# include them in the parent directory.
--include $(common-objpfx)s-proto.d
-endif
endif
-$(common-objpfx)s-proto.d: $(common-objpfx)%.d: $(..)sysdeps/unix/%.S \
- $(before-compile)
+$(common-objpfx)s-%.d: $(..)sysdeps/unix/s-%.S \
+ $(wildcard $(+sysdep_dirs:%=%/syscalls.list))
$(+make-deps)
+postclean-generated += sysd-syscalls
+
endif
projects / thirdparty / glibc.git / blobdiff