Merge branch 'syscalls' into for-linus

Conflicts:
	arch/arm/include/asm/unistd.h
	arch/arm/include/uapi/asm/unistd.h
	arch/arm/kernel/calls.S

arch/arm/Makefile

@@ -311,8 +311,11 @@ all:	$(KBUILD_IMAGE) $(KBUILD_DTBS)
 
 boot := arch/arm/boot
 
+archheaders:
+	$(Q)$(MAKE) $(build)=arch/arm/tools uapi
+
 archprepare:
-	$(Q)$(MAKE) $(build)=arch/arm/tools include/generated/mach-types.h
+	$(Q)$(MAKE) $(build)=arch/arm/tools kapi
 
 # Convert bzImage to zImage
 bzImage: zImage

arch/arm/include/asm/Kbuild

@@ -38,3 +38,6 @@ generic-y += termios.h
 generic-y += timex.h
 generic-y += trace_clock.h
 generic-y += unaligned.h
+
+generated-y += mach-types.h
+generated-y += unistd-nr.h

arch/arm/include/asm/mach-types.h

-#include <generated/mach-types.h>

arch/arm/include/asm/unistd.h

@@ -14,12 +14,7 @@
 #define __ASM_ARM_UNISTD_H
 
 #include <uapi/asm/unistd.h>
-
-/*
- * This may need to be greater than __NR_last_syscall+1 in order to
- * account for the padding in the syscall table
- */
-#define __NR_syscalls  (400)
+#include <asm/unistd-nr.h>
 
 #define __ARCH_WANT_STAT64
 #define __ARCH_WANT_SYS_GETHOSTNAME
@@ -52,4 +47,23 @@
 #define __IGNORE_fadvise64_64
 #define __IGNORE_migrate_pages
 
+#ifdef __ARM_EABI__
+/*
+ * The following syscalls are obsolete and no longer available for EABI:
+ *  __NR_time
+ *  __NR_umount
+ *  __NR_stime
+ *  __NR_alarm
+ *  __NR_utime
+ *  __NR_getrlimit
+ *  __NR_select
+ *  __NR_readdir
+ *  __NR_mmap
+ *  __NR_socketcall
+ *  __NR_syscall
+ *  __NR_ipc
+ */
+#define __IGNORE_getrlimit
+#endif
+
 #endif /* __ASM_ARM_UNISTD_H */

arch/arm/include/uapi/asm/Kbuild

@@ -18,3 +18,6 @@ header-y += stat.h
 header-y += statfs.h
 header-y += swab.h
 header-y += unistd.h
+genhdr-y += unistd-common.h
+genhdr-y += unistd-oabi.h
+genhdr-y += unistd-eabi.h

arch/arm/kernel/entry-common.S

@@ -12,6 +12,11 @@
 #include <asm/unistd.h>
 #include <asm/ftrace.h>
 #include <asm/unwind.h>
+#ifdef CONFIG_AEABI
+#include <asm/unistd-oabi.h>
+#endif
+
+	.equ	NR_syscalls, __NR_syscalls
 
 #ifdef CONFIG_NEED_RET_TO_USER
 #include <mach/entry-macro.S>
@@ -120,21 +125,6 @@ ENTRY(ret_from_fork)
 	b	ret_slow_syscall
 ENDPROC(ret_from_fork)
 
-	.equ NR_syscalls,0
-#define CALL(x) .equ NR_syscalls,NR_syscalls+1
-#include "calls.S"
-
-/*
- * Ensure that the system call table is equal to __NR_syscalls,
- * which is the value the rest of the system sees
- */
-.ifne NR_syscalls - __NR_syscalls
-.error "__NR_syscalls is not equal to the size of the syscall table"
-.endif
-
-#undef CALL
-#define CALL(x) .long x
-
 /*=============================================================================
  * SWI handler
  *-----------------------------------------------------------------------------
@@ -291,22 +281,48 @@ __cr_alignment:
 #endif
 	.ltorg
 
+	.macro	syscall_table_start, sym
+	.equ	__sys_nr, 0
+	.type	\sym, #object
+ENTRY(\sym)
+	.endm
+
+	.macro	syscall, nr, func
+	.ifgt	__sys_nr - \nr
+	.error	"Duplicated/unorded system call entry"
+	.endif
+	.rept	\nr - __sys_nr
+	.long	sys_ni_syscall
+	.endr
+	.long	\func
+	.equ	__sys_nr, \nr + 1
+	.endm
+
+	.macro	syscall_table_end, sym
+	.ifgt	__sys_nr - __NR_syscalls
+	.error	"System call table too big"
+	.endif
+	.rept	__NR_syscalls - __sys_nr
+	.long	sys_ni_syscall
+	.endr
+	.size	\sym, . - \sym
+	.endm
+
+#define NATIVE(nr, func) syscall nr, func
+
 /*
  * This is the syscall table declaration for native ABI syscalls.
  * With EABI a couple syscalls are obsolete and defined as sys_ni_syscall.
  */
-#define ABI(native, compat) native
+	syscall_table_start sys_call_table
+#define COMPAT(nr, native, compat) syscall nr, native
 #ifdef CONFIG_AEABI
-#define OBSOLETE(syscall) sys_ni_syscall
+#include <calls-eabi.S>
 #else
-#define OBSOLETE(syscall) syscall
+#include <calls-oabi.S>
 #endif
-
-	.type	sys_call_table, #object
-ENTRY(sys_call_table)
-#include "calls.S"
-#undef ABI
-#undef OBSOLETE
+#undef COMPAT
+	syscall_table_end sys_call_table
 
 /*============================================================================
  * Special system call wrappers
@@ -407,14 +423,10 @@ ENDPROC(sys_oabi_readahead)
  * Let's declare a second syscall table for old ABI binaries
  * using the compatibility syscall entries.
  */
-#define ABI(native, compat) compat
-#define OBSOLETE(syscall) syscall
-
-	.type	sys_oabi_call_table, #object
-ENTRY(sys_oabi_call_table)
-#include "calls.S"
-#undef ABI
-#undef OBSOLETE
+	syscall_table_start sys_oabi_call_table
+#define COMPAT(nr, native, compat) syscall nr, compat
+#include <calls-oabi.S>
+	syscall_table_end sys_oabi_call_table
 
 #endif
 

arch/arm/tools/Makefile

@@ -4,10 +4,76 @@
 # Copyright (C) 2001 Russell King
 #
 
+gen := arch/$(ARCH)/include/generated
+kapi := $(gen)/asm
+uapi := $(gen)/uapi/asm
+syshdr := $(srctree)/$(src)/syscallhdr.sh
+sysnr := $(srctree)/$(src)/syscallnr.sh
+systbl := $(srctree)/$(src)/syscalltbl.sh
+syscall := $(srctree)/$(src)/syscall.tbl
+
+gen-y := $(gen)/calls-oabi.S
+gen-y += $(gen)/calls-eabi.S
+kapi-hdrs-y := $(kapi)/unistd-nr.h
+kapi-hdrs-y += $(kapi)/mach-types.h
+uapi-hdrs-y := $(uapi)/unistd-common.h
+uapi-hdrs-y += $(uapi)/unistd-oabi.h
+uapi-hdrs-y += $(uapi)/unistd-eabi.h
+
+targets += $(addprefix ../../../,$(gen-y) $(kapi-hdrs-y) $(uapi-hdrs-y))
+
+PHONY += kapi uapi
+
+kapi:	$(kapi-hdrs-y) $(gen-y)
+
+uapi:	$(uapi-hdrs-y)
+
+# Create output directory if not already present
+_dummy := $(shell [ -d '$(kapi)' ] || mkdir -p '$(kapi)') \
+          $(shell [ -d '$(uapi)' ] || mkdir -p '$(uapi)')
+
 quiet_cmd_gen_mach = GEN     $@
       cmd_gen_mach = mkdir -p $(dir $@) && \
 		     $(AWK) -f $(filter-out $(PHONY),$^) > $@ || \
 		     { rm -f $@; /bin/false; }
 
-include/generated/mach-types.h: $(src)/gen-mach-types $(src)/mach-types FORCE
+$(kapi)/mach-types.h: $(src)/gen-mach-types $(src)/mach-types FORCE
 	$(call if_changed,gen_mach)
+
+quiet_cmd_syshdr = SYSHDR  $@
+      cmd_syshdr = $(CONFIG_SHELL) '$(syshdr)' '$<' '$@' \
+		   '$(syshdr_abi_$(basetarget))' \
+		   '$(syshdr_pfx_$(basetarget))' \
+		   '__NR_SYSCALL_BASE'
+
+quiet_cmd_systbl = SYSTBL  $@
+      cmd_systbl = $(CONFIG_SHELL) '$(systbl)' '$<' '$@' \
+		   '$(systbl_abi_$(basetarget))'
+
+quiet_cmd_sysnr  = SYSNR   $@
+      cmd_sysnr  = $(CONFIG_SHELL) '$(sysnr)' '$<' '$@' \
+		   '$(syshdr_abi_$(basetarget))'
+
+syshdr_abi_unistd-common := common
+$(uapi)/unistd-common.h: $(syscall) $(syshdr) FORCE
+	$(call if_changed,syshdr)
+
+syshdr_abi_unistd-oabi := oabi
+$(uapi)/unistd-oabi.h: $(syscall) $(syshdr) FORCE
+	$(call if_changed,syshdr)
+
+syshdr_abi_unistd-eabi := eabi
+$(uapi)/unistd-eabi.h: $(syscall) $(syshdr) FORCE
+	$(call if_changed,syshdr)
+
+sysnr_abi_unistd-nr := common,oabi,eabi,compat
+$(kapi)/unistd-nr.h: $(syscall) $(sysnr) FORCE
+	$(call if_changed,sysnr)
+
+systbl_abi_calls-oabi := common,oabi
+$(gen)/calls-oabi.S: $(syscall) $(systbl) FORCE
+	$(call if_changed,systbl)
+
+systbl_abi_calls-eabi := common,eabi
+$(gen)/calls-eabi.S: $(syscall) $(systbl) FORCE
+	$(call if_changed,systbl)

arch/arm/tools/syscallhdr.sh

+#!/bin/sh
+
+in="$1"
+out="$2"
+my_abis=`echo "($3)" | tr ',' '|'`
+prefix="$4"
+offset="$5"
+
+fileguard=_ASM_ARM_`basename "$out" | sed \
+    -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' \
+    -e 's/[^A-Z0-9_]/_/g' -e 's/__/_/g'`
+if echo $out | grep -q uapi; then
+    fileguard="_UAPI$fileguard"
+fi
+grep -E "^[0-9A-Fa-fXx]+[[:space:]]+${my_abis}" "$in" | sort -n | (
+    echo "#ifndef ${fileguard}"
+    echo "#define ${fileguard} 1"
+    echo ""
+
+    while read nr abi name entry ; do
+	if [ -z "$offset" ]; then
+	    echo "#define __NR_${prefix}${name} $nr"
+	else
+	    echo "#define __NR_${prefix}${name} ($offset + $nr)"
+        fi
+    done
+
+    echo ""
+    echo "#endif /* ${fileguard} */"
+) > "$out"

arch/arm/tools/syscallnr.sh

+#!/bin/sh
+in="$1"
+out="$2"
+my_abis=`echo "($3)" | tr ',' '|'`
+align=1
+
+fileguard=_ASM_ARM_`basename "$out" | sed \
+    -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' \
+    -e 's/[^A-Z0-9_]/_/g' -e 's/__/_/g'`
+
+grep -E "^[0-9A-Fa-fXx]+[[:space:]]+${my_abis}" "$in" | sort -n | tail -n1 | (
+    echo "#ifndef ${fileguard}
+#define ${fileguard} 1
+
+/*
+ * This needs to be greater than __NR_last_syscall+1 in order to account
+ * for the padding in the syscall table.
+ */
+"
+
+    while read nr abi name entry; do
+        nr=$(($nr + 1))
+        while [ "$(($nr / (256 * $align) ))" -gt 0 ]; do
+            align=$(( $align * 4 ))
+        done
+        nr=$(( ($nr + $align - 1) & ~($align - 1) ))
+        echo "/* aligned to $align */"
+        echo "#define __NR_syscalls $nr"
+    done
+
+    echo ""
+    echo "#endif /* ${fileguard} */"
+) > "$out"

arch/arm/tools/syscalltbl.sh

+#!/bin/sh
+in="$1"
+out="$2"
+my_abis=`echo "($3)" | tr ',' '|'`
+
+grep -E "^[0-9A-Fa-fXx]+[[:space:]]+${my_abis}" "$in" | sort -n | (
+    while read nr abi name entry compat; do
+        if [ "$abi" = "eabi" -a -n "$compat" ]; then
+            echo "$in: error: a compat entry for an EABI syscall ($name) makes no sense" >&2
+            exit 1
+        fi
+
+	if [ -n "$entry" ]; then
+            if [ -z "$compat" ]; then
+                echo "NATIVE($nr, $entry)"
+            else
+                echo "COMPAT($nr, $entry, $compat)"
+            fi
+        fi
+    done
+) > "$out"