diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/Makefile')
| -rw-r--r-- | sysdeps/unix/sysv/linux/Makefile | 107 |
1 files changed, 39 insertions, 68 deletions
diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile index 1872cdb179..5573c4ebdd 100644 --- a/sysdeps/unix/sysv/linux/Makefile +++ b/sysdeps/unix/sysv/linux/Makefile @@ -45,75 +45,46 @@ sysdep_headers += sys/mount.h sys/acct.h sys/sysctl.h \ tests += tst-clone tst-clone2 tst-fanotify tst-personality tst-quota \ tst-sync_file_range test-errno-linux -# Generate the list of SYS_* macros for the system calls (__NR_* macros). - -# If there is more than one syscall list for different architecture -# variants, the CPU/Makefile defines abi-variants to be a list of names -# for those variants (e.g. 32 64), and, for each variant, defines -# abi-$(variant)-options to be compiler options to cause <asm/unistd.h> -# to define the desired list of syscalls and abi-$(variant)-condition to -# be the condition for those options to use in a C #if condition. -# abi-includes may be defined to a list of headers to include -# in the generated header, if the default does not suffice. -# -# The generated header is compiled with `-ffreestanding' to avoid any -# circular dependencies against the installed implementation headers. -# Such a dependency would require the implementation header to be -# installed before the generated header could be built (See bug 15711). -# In current practice the generated header dependencies do not include -# any of the implementation headers removed by the use of `-ffreestanding'. - -$(objpfx)bits/syscall%h $(objpfx)bits/syscall%d: ../sysdeps/unix/sysv/linux/sys/syscall.h +# Generate the list of SYS_* macros for the system calls (__NR_* +# macros). The file syscall-names.list contains all possible system +# call names, and the generated header file produces SYS_* macros for +# the __NR_* macros which are actually defined. + +generated += bits/syscall.h +$(objpfx)bits/syscall.h: \ + ../sysdeps/unix/sysv/linux/gen-syscall-h.awk \ + ../sysdeps/unix/sysv/linux/syscall-names.list $(make-target-directory) - { \ - echo '/* Generated at libc build time from kernel syscall list. */';\ - echo ''; \ - echo '#ifndef _SYSCALL_H'; \ - echo '# error "Never use <bits/syscall.h> directly; include <sys/syscall.h> instead."'; \ - echo '#endif'; \ - echo ''; \ - $(foreach h,$(abi-includes), echo '#include <$(h)>';) \ - echo ''; \ - $(if $(abi-variants), \ - $(foreach v,$(abi-variants),\ - $(CC) -ffreestanding -E -MD -MP -MF $(@:.h=.d)-t$(v) -MT '$(@:.d=.h) $(@:.h=.d)' \ - -x c $(sysincludes) $< $(abi-$(v)-options) \ - -D_LIBC -dM | \ - sed -n 's@^#define __NR_\([^ ]*\) .*$$@#define SYS_\1 __NR_\1@p' | \ - LC_ALL=C sort > $(@:.d=.h).new$(v); \ - $(if $(abi-$(v)-condition),\ - echo '#if $(abi-$(v)-condition)';) \ - cat $(@:.d=.h).new$(v); \ - $(if $(abi-$(v)-condition),echo '#endif';) \ - rm -f $(@:.d=.h).new$(v); \ - ), \ - $(CC) -ffreestanding -E -MD -MP -MF $(@:.h=.d)-t$(v) -MT '$(@:.d=.h) $(@:.h=.d)' \ - -x c $(sysincludes) $< \ - -D_LIBC -dM | \ - sed -n 's@^#define __NR_\([^ ]*\) .*$$@#define SYS_\1 __NR_\1@p' | \ - LC_ALL=C sort;) \ - } > $(@:.d=.h).new - mv -f $(@:.d=.h).new $(@:.d=.h) -ifdef abi-variants -ifneq (,$(objpfx)) - sed $(sed-remove-objpfx) \ - $(foreach v,$(abi-variants),$(@:.h=.d)-t$(v)) > $(@:.h=.d)-t3 -else - cat $(foreach v,$(abi-variants),$(@:.h=.d)-t$(v)) \ - > $(@:.h=.d)-t3 -endif - rm -f $(foreach v,$(abi-variants),$(@:.h=.d)-t$(v)) - mv -f $(@:.h=.d)-t3 $(@:.h=.d) -else - mv -f $(@:.h=.d)-t $(@:.h=.d) -endif - -ifndef no_deps -# Get the generated list of dependencies (probably /usr/include/asm/unistd.h). --include $(objpfx)bits/syscall.d -endif -generated += bits/syscall.h bits/syscall.d -endif + $(AWK) -f $^ > $@-tmp + $(move-if-change) $@-tmp $@ + +# All macros defined by <sys/syscall.h>. Include <bits/syscall.h> +# explicitly because <sys/sycall.h> skips it if _LIBC is defined. +$(objpfx)tst-syscall-list-macros.list: \ + $(objpfx)bits/syscall.h ../sysdeps/unix/sysv/linux/sys/syscall.h + printf '#include <sys/syscall.h>\n#include <bits/syscall.h>\n' | \ + $(CC) -E -o $@-tmp $(CFLAGS) $(CPPFLAGS) -x c - -dM + $(move-if-change) $@-tmp $@ + +# __NR_* system call names. Used by the test below. +$(objpfx)tst-syscall-list-nr.list: \ + ../sysdeps/unix/sysv/linux/filter-nr-syscalls.awk \ + $(objpfx)tst-syscall-list-macros.list + $(AWK) -f $^ > $@-tmp + $(move-if-change) $@-tmp $@ + +# SYS_* system call names. Used by the test below. +$(objpfx)tst-syscall-list-sys.list: $(objpfx)tst-syscall-list-macros.list + $(AWK) '/^#define SYS_/ { print substr($$2, 5) }' $< > $@-tmp + $(move-if-change) $@-tmp $@ + +tests-special += $(objpfx)tst-syscall-list.out +$(objpfx)tst-syscall-list.out: \ + ../sysdeps/unix/sysv/linux/tst-syscall-list.sh \ + $(objpfx)tst-syscall-list-nr.list $(objpfx)tst-syscall-list-sys.list + $(BASH) $^ > $@; $(evaluate-test) + +endif # $(subdir) == misc ifeq ($(subdir),time) sysdep_headers += sys/timex.h bits/timex.h |