about summary refs log tree commit diff
path: root/sysdeps/unix/sysv/linux/mips/Makefile
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/unix/sysv/linux/mips/Makefile')
-rw-r--r--sysdeps/unix/sysv/linux/mips/Makefile110
1 files changed, 91 insertions, 19 deletions
diff --git a/sysdeps/unix/sysv/linux/mips/Makefile b/sysdeps/unix/sysv/linux/mips/Makefile
index d5e4f6b72d..72fa87b3ff 100644
--- a/sysdeps/unix/sysv/linux/mips/Makefile
+++ b/sysdeps/unix/sysv/linux/mips/Makefile
@@ -9,11 +9,73 @@ sysdep_headers += sys/cachectl.h sys/sysmips.h sys/tas.h
 
 no_syscall_list_h = 1
 
-# Generate the list of SYS_* macros for the system calls (__NR_* macros).
-# We generate not only SYS_<syscall>, pointing at SYS_<abi>_<syscall> if
-# it exists, but also define SYS_<abi>_<syscall> for all ABIs.
+# A callable macro that expands to a shell command.  Preprocess file $(1)
+# using ABI option $(2) and see which macros it defines.  Print FOO for each
+# macro of the form __NR$(3)_FOO, filtering out ABI-specific __NR macros
+# that have a prefix other than $(3).
+mips_list_syscalls =	$(filter-out -m%,$(CC)) -E -x c $(+includes) \
+			    $(sysincludes) -D_LIBC -dM -mabi=$(2) $(1) | \
+			sed -n 's@^\#define __NR$(3)_\([^ ]*\) .*@\1@p' | \
+			sed -e '/^[ON]32_/d' -e '/^N64_/d' -e '/^64_/d' | \
+			LC_ALL=C sort
+
+# Generate a list of SYS_* macros from the linux __NR macros.
+#
+# Before version 2.6, linux had separate 32-bit and 64-bit MIPS ports,
+# each with its own set of headers.  The ports were merged for 2.6 and
+# this merged port defines the syscalls in a slightly different way.
+# There are therefore three sets of headers that we need to consider:
+#
+#    (1) Headers from the separate 32-bit MIPS port.  They just define
+#	 a single list of __NR macros.
+#
+#    (2) Headers from the separate 64-bit MIPS port.  They unconditionally
+#	 define syscalls for all three ABIs, with o32 syscalls prefixed
+#	 by __NR_O32, n32 syscalls prefixed by __NR_N32 and n64 syscalls
+#	 prefixed by plain __NR.
+#
+#    (3) Headers from the combined port.  They use the _MIPS_SIM macro to
+#	 define the right set of syscalls for the current ABI.  The syscalls
+#	 themselves have no special ABI prefix, but the headers also define:
+#
+#	    __NR_O32_Linux{,_syscalls}
+#	    __NR_N32_Linux{,_syscalls}
+#	    __NR_64_Linux{,_syscalls}
+#
+# In case (1) we just want a simple list of SYS_* macros.  In cases (2)
+# and (3) we want a file that will work for all three ABIs, regardless
+# of which ABI we are currently using.  We also want the file to work
+# if the user later moves from (2) to (3).  Thus the file we create
+# for (2) and (3) has the form:
+#
+#    #if _MIPS_SIM == _ABIN32
+#    # ifdef __NR_N32_open
+#    #  define SYS_n32syscall1 __NR_N32_n32syscall1
+#    #  ...
+#    # else
+#    #  define SYS_n32syscall1 __NR_n32syscall1
+#    #  ...
+#    # endif
+#    #elif _MIPS_SIM == _ABI64
+#    # define SYS_n64syscall1 __NR_n64syscall1
+#    # ...
+#    #else
+#    # ifdef __NR_O32_open
+#    #  define SYS_o32syscall1 __NR_O32_o32syscall1
+#    #  ...
+#    # else
+#    #  define SYS_o32syscall1 __NR_o32syscall1
+#    #  ...
+#    # endif
+#    #endif
+#
+# Here, __NR_N32_open and __NR_O32_open are used to detect case (2)
+# over case (3).  The n64 SYS_* macros can always use the normal
+# ABI-less names.
 $(objpfx)syscall-%.h $(objpfx)syscall-%.d: ../sysdeps/unix/sysv/linux/mips/sys/syscall.h
 	$(make-target-directory)
+	$(CC) -E -x c $(+includes) $(sysincludes) -D_LIBC $< -MD -MP \
+	      -MF $(@:.h=.d)-t -MT '$(@:.d=.h) $(@:.h=.d)' > /dev/null
 	{ \
 	 echo '/* Generated at libc build time from kernel syscall list.  */';\
 	 echo ''; \
@@ -22,28 +84,38 @@ $(objpfx)syscall-%.h $(objpfx)syscall-%.d: ../sysdeps/unix/sysv/linux/mips/sys/s
 	 echo '#endif'; \
 	 echo ''; \
 	 echo '#include <sgidefs.h>'; \
-	 rm -f $(@:.d=.h).newt; \
-	 $(CC) -E -MD -MP -MF $(@:.h=.d)-t -MT '$(@:.d=.h) $(@:.h=.d)' \
-	       -x c $(+includes) $(sysincludes) $< -D_LIBC -dM | \
-	 sed -n 's@^#define __NR_\([^ ]*\) .*$$@#define SYS_\1 __NR_\1@p' \
-	     > $(@:.d=.h).newt; \
-	 if grep SYS_O32_ $(@:.d=.h).newt > /dev/null; then \
+	 rm -f $(@:.d=.h).new32 $(@:.d=.h).newn32 $(@:.d=.h).new64; \
+	 $(call mips_list_syscalls,$<,n32,_N32) > $(@:.d=.h).newn32; \
+	 if test -s $(@:.d=.h).newn32; then \
+	   if grep open $(@:.d=.h).newn32 > /dev/null; then \
+	     $(call mips_list_syscalls,$<,32,_O32) > $(@:.d=.h).new32; \
+	     $(call mips_list_syscalls,$<,64,) > $(@:.d=.h).new64; \
+	   else \
+	     $(call mips_list_syscalls,$<,32,) > $(@:.d=.h).new32; \
+	     $(call mips_list_syscalls,$<,n32,) > $(@:.d=.h).newn32; \
+	     $(call mips_list_syscalls,$<,64,) > $(@:.d=.h).new64; \
+	   fi; \
 	   echo '#if _MIPS_SIM == _ABIN32'; \
-	   sed -n 's/^\(#define SYS_\)N32_/\1/p' < $(@:.d=.h).newt | \
-		LC_ALL=C sort; \
+	   echo '# ifdef __NR_N32_open'; \
+	   sed 's@\(.*\)@#  define SYS_\1 __NR_N32_\1@' < $(@:.d=.h).newn32; \
+	   echo '# else'; \
+	   sed 's@\(.*\)@#  define SYS_\1 __NR_\1@' < $(@:.d=.h).newn32; \
+	   echo '# endif'; \
 	   echo '#elif _MIPS_SIM == _ABI64'; \
-	   sed -n 's/^\(#define SYS_\)N64_/\1/p' < $(@:.d=.h).newt | \
-		LC_ALL=C sort; \
+	   sed 's@\(.*\)@# define SYS_\1 __NR_\1@' < $(@:.d=.h).new64; \
 	   echo '#else'; \
-	   sed -n 's/^\(#define SYS_\)O32_/\1/p' < $(@:.d=.h).newt | \
-		LC_ALL=C sort; \
+	   echo '# ifdef __NR_O32_open'; \
+	   sed 's@\(.*\)@#  define SYS_\1 __NR_O32_\1@' < $(@:.d=.h).new32; \
+	   echo '# else'; \
+	   sed 's@\(.*\)@#  define SYS_\1 __NR_\1@' < $(@:.d=.h).new32; \
+	   echo '# endif'; \
 	   echo '#endif'; \
-	   sed -n '/^#define SYS_\([ON]32\|N64\)_/p' < $(@:.d=.h).newt | \
-		LC_ALL=C sort +1.8; \
 	 else \
-	   cat $(@:.d=.h).newt; \
+	   $(CC) -E -x c $(+includes) $(sysincludes) -D_LIBC -dM $< | \
+	   sed -n 's@^\#define __NR_\([^ ]*\) .*@\#define SYS_\1 __NR_\1@p' | \
+	   LC_ALL=C sort; \
 	 fi; \
-	 rm $(@:.d=.h).newt; \
+	 rm -f $(@:.d=.h).new32 $(@:.d=.h).newn32 $(@:.d=.h).new64; \
 	} > $(@:.d=.h).new
 	mv -f $(@:.d=.h).new $(@:.d=.h)
 ifneq (,$(objpfx))