* sysdeps/unix/sysv/linux/m68k/vfork.S: Optimize for kernels which

	are known to have the vfork syscall.

	* sysdeps/m68k/sysdep.h (JUMPTARGET): Undefine before defining it.

	* sysdeps/unix/sysv/linux/kernel-features.h
	(__ASSUME_MMAP2_SYSCALL, __ASSUME_TRUNCATE64_SYSCALL)
	(__ASSUME_STAT64_SYSCALL, __ASSUME_FCNTL64)
	(__ASSUME_VFORK_SYSCALL): Define for m68k kernels >= 2.4.12.

2 files changed, 42 insertions, 32 deletions

diff --git a/sysdeps/m68k/sysdep.h b/sysdeps/m68k/sysdep.h
index 554b92d..f492ff6 100644
--- a/sysdeps/m68k/sysdep.h
+++ b/sysdeps/m68k/sysdep.h
@@ -1,5 +1,5 @@
 /* Assembler macros for m68k.
-   Copyright (C) 1998 Free Software Foundation, Inc.
+   Copyright (C) 1998, 2003 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
@@ -23,25 +23,25 @@
 
 /* Syntactic details of assembler.  */
 
-#ifdef HAVE_ELF
+# ifdef HAVE_ELF
 
 /* ELF uses byte-counts for .align, most others use log2 of count of bytes.  */
-#define ALIGNARG(log2) 1<<log2
+#  define ALIGNARG(log2) 1<<log2
 /* For ELF we need the `.type' directive to make shared libs work right.  */
-#define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg
-#define ASM_SIZE_DIRECTIVE(name) .size name,.-name
+#  define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg
+#  define ASM_SIZE_DIRECTIVE(name) .size name,.-name
 
 /* In ELF C symbols are asm symbols.  */
-#undef	NO_UNDERSCORES
-#define NO_UNDERSCORES
+#  undef NO_UNDERSCORES
+#  define NO_UNDERSCORES
 
-#else
+# else
 
-#define ALIGNARG(log2) log2
-#define ASM_TYPE_DIRECTIVE(name,type)	/* Nothing is specified.  */
-#define ASM_SIZE_DIRECTIVE(name)	/* Nothing is specified.  */
+#  define ALIGNARG(log2) log2
+#  define ASM_TYPE_DIRECTIVE(name,type)	/* Nothing is specified.  */
+#  define ASM_SIZE_DIRECTIVE(name)	/* Nothing is specified.  */
 
-#endif
+# endif
 
 
 /* Define an entry point visible from C.
@@ -49,51 +49,52 @@
    There is currently a bug in gdb which prevents us from specifying
    incomplete stabs information.  Fake some entries here which specify
    the current source file.  */
-#define	ENTRY(name)							      \
+# define ENTRY(name)							      \
   .globl C_SYMBOL_NAME(name);						      \
   ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function);			      \
   .align ALIGNARG(2);							      \
   C_LABEL(name)								      \
   CALL_MCOUNT
 
-#undef END
-#define END(name) ASM_SIZE_DIRECTIVE(name)
+# undef END
+# define END(name) ASM_SIZE_DIRECTIVE(name)
 
 
 /* If compiled for profiling, call `_mcount' at the start of each function.  */
-#ifdef	PROF
+# ifdef	PROF
 /* The mcount code relies on a normal frame pointer being on the stack
    to locate our caller, so push one just for its benefit.  */
-#define CALL_MCOUNT \
+#  define CALL_MCOUNT \
   move.l %fp, -(%sp); move.l %sp, %fp;					      \
   jbsr JUMPTARGET (mcount);						      \
   move.l (%sp)+, %fp;
-#else
-#define CALL_MCOUNT		/* Do nothing.  */
-#endif
+# else
+#  define CALL_MCOUNT		/* Do nothing.  */
+# endif
 
-#ifdef	NO_UNDERSCORES
+# ifdef	NO_UNDERSCORES
 /* Since C identifiers are not normally prefixed with an underscore
    on this system, the asm identifier `syscall_error' intrudes on the
    C name space.  Make sure we use an innocuous name.  */
-#define	syscall_error	__syscall_error
-#define mcount		_mcount
-#endif
+#  define syscall_error	__syscall_error
+#  define mcount	_mcount
+# endif
 
-#define	PSEUDO(name, syscall_name, args)				      \
+# define PSEUDO(name, syscall_name, args)				      \
   .globl syscall_error;							      \
   ENTRY (name)								      \
     DO_CALL (syscall_name, args);					      \
     jcc JUMPTARGET(syscall_error)
 
-#undef PSEUDO_END
-#define PSEUDO_END(name)						      \
+# undef PSEUDO_END
+# define PSEUDO_END(name)						      \
   END (name)
 
-#ifdef PIC
-#define JUMPTARGET(name)	name##@PLTPC
-#else
-#define JUMPTARGET(name)	name
-#endif
+# undef JUMPTARGET
+# ifdef PIC
+#  define JUMPTARGET(name)	name##@PLTPC
+# else
+#  define JUMPTARGET(name)	name
+# endif
 
 #endif	/* __ASSEMBLER__ */
diff --git a/sysdeps/unix/sysv/linux/kernel-features.h b/sysdeps/unix/sysv/linux/kernel-features.h
index c93ab35..6b1bdf2 100644
--- a/sysdeps/unix/sysv/linux/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/kernel-features.h
@@ -240,3 +240,12 @@
 #if __LINUX_KERNEL_VERSION >= 132402 && defined __i386__
 # define __ASSUME_CLONE_THREAD_FLAGS	1
 #endif
+
+/* These features were surely available with 2.4.12.  */
+#if __LINUX_KERNEL_VERSION >= 132108 && defined __mc68000__
+# define __ASSUME_MMAP2_SYSCALL		1
+# define __ASSUME_TRUNCATE64_SYSCALL	1
+# define __ASSUME_STAT64_SYSCALL	1
+# define __ASSUME_FCNTL64		1
+# define __ASSUME_VFORK_SYSCALL		1
+#endif