diff options
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/unix/Makefile | 33 | ||||
| -rw-r--r-- | sysdeps/unix/make-syscalls.sh | 76 |
2 files changed, 106 insertions, 3 deletions
diff --git a/sysdeps/unix/Makefile b/sysdeps/unix/Makefile index 9ffb344683..a09ea4f76f 100644 --- a/sysdeps/unix/Makefile +++ b/sysdeps/unix/Makefile @@ -1,4 +1,4 @@ -# Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc. +# Copyright (C) 1991, 92, 93, 94, 95, 96 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 @@ -85,7 +85,7 @@ ifndef no_deps include $(common-objpfx)param.h.dep endif -# Don't preempt our own headers. +# Don't preempt our own headers. sys/param.h-includes := \ $(filter-out $(patsubst $(..)%,%,\ $(wildcard $(addprefix $(..),\ @@ -130,7 +130,7 @@ ifeq (,$(filter-out $(sysdep_dir)/stub/ $(common-objpfx),\ # 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 +before-compile := $(before-compile) $(common-objpfx)errnos.h $(common-objpfx)errnos.h: $(common-objpfx)make-errnos $(dir $<)$(notdir $<) > $@-tmp @@ -266,3 +266,30 @@ common-generated := $(common-generated) syscall.h endif endif + +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 $(objpfx)sysd-syscalls +omit-deps += $(unix-syscalls) + +ifeq (misc,$(subdir)) +sysdep_routines += $(unix-extra-syscalls) +endif + +export sysdirs +export asm_CPP := $(COMPILE.S) -E -x assembler-with-cpp + +$(objpfx)sysd-syscalls: $(..)sysdeps/unix/make-syscalls.sh \ + $(wildcard $(+sysdep_dirs:%=%/syscalls.list)) + for dir in $$sysdirs; do \ + test -f $(..)sysdeps/$$dir/syscalls.list && \ + { $(SHELL) $(dir $<)$(notdir $<) \ + $(..)sysdeps $$dir $(object-suffixes) || exit 1; }; \ + test $$dir = unix && break; \ + done > $@T + mv -f $@T $@ + +endif diff --git a/sysdeps/unix/make-syscalls.sh b/sysdeps/unix/make-syscalls.sh new file mode 100644 index 0000000000..ff4b082b11 --- /dev/null +++ b/sysdeps/unix/make-syscalls.sh @@ -0,0 +1,76 @@ +#! /bin/sh + +# Usage: make-syscalls.sh ../sysdeps unix/common +# Expects $sysdirs in environment. + +sysbase=$1; shift +thisdir=$1; shift + +# Get the list of system calls for this directory. +calls=`sed 's/#.*$// +/^[ ]*$/d' $sysbase/$thisdir/syscalls.list` + +# Check each sysdep dir with higher priority than this one, +# and remove from $calls all the functions found in other dirs. +for dir in $sysdirs; do + + # Punt when we reach the directory defining these syscalls. + test $dir = $thisdir && break + + # Remove each syscall that is implemented by a file in $dir. + # If a syscall specified a "caller", then only compile that syscall + # if the caller function is also implemented in this directory. + calls=`echo "$calls" | while read file caller rest; do + test -f $sysbase/$dir/$file.c && continue + test -f $sysbase/$dir/$file.S && continue + test -f $sysbase/$dir/$file.s && continue + if test x$caller != x-; then + test -f $sysbase/$dir/$caller.c && continue + test -f $sysbase/$dir/$caller.S && continue + test -f $sysbase/$dir/$caller.s && continue + fi + echo $file $caller $rest + done` + +done + +# Any calls left? +test -n "$calls" || exit 0 + +files= + +# Emit rules to compile the syscalls remaining in $calls. +echo "$calls" | while read file caller syscall nargs strong weak; do + + # Figure out if $syscall is defined with a number in syscall.h. + $asm_CPP - << EOF | grep "^@@@ .*$syscall" >/dev/null && continue +#include <sysdep.h> +@@@ SYS_ify ($syscall) +EOF + + # Make sure only the first syscall rule is used, if multiple dirs + # define the same syscall. + echo "ifeq (,\$(filter $file,\$(unix-syscalls)))" + + # Accumulate the list of syscall files for this directory. + echo "unix-syscalls += $file" + test x$caller = x- || echo "unix-extra-syscalls += $file" + + # Emit a compilation rule for this syscall. + echo "\ +\$(foreach o,\$(object-suffixes),\$(objpfx)$file\$o): \$(objpfx)s-proto.d + (echo '#include <sysdep.h>'; \\ + echo 'PSEUDO ($strong, $syscall, $nargs)'; \\ + echo ' ret'; \\" + + # Append any weak aliases defined for this syscall function. + for name in $weak; do + echo " echo 'weak_alias ($strong, $name)'; \\" + done + + # And finally, pipe this all into the compiler. + echo ' ) | $(COMPILE.S) -x assembler-with-cpp -o $@ -' + + echo endif + +done |