x86: Check awk features before generating inat-tables.c

Check some awk mandatory features to generate inat-tables.c
that old mawk doesn't support.

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Avi Kivity <avi@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jason Baron <jbaron@redhat.com>
Cc: K.Prasad <prasad@linux.vnet.ibm.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Przemysław Pawełczyk <przemyslaw@pawelczyk.it>
Cc: Roland McGrath <roland@redhat.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Tom Zanussi <tzanussi@gmail.com>
Cc: Vegard Nossum <vegard.nossum@gmail.com>
LKML-Reference: <20090821194316.12478.57394.stgit@localhost.localdomain>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>

diff --git a/arch/x86/tools/gen-insn-attr-x86.awk b/arch/x86/tools/gen-insn-attr-x86.awk
index 93b62c9..19ba096 100644 (file)
--- a/arch/x86/tools/gen-insn-attr-x86.awk
+++ b/arch/x86/tools/gen-insn-attr-x86.awk
@@ -4,7 +4,25 @@
 #
 # Usage: awk -f gen-insn-attr-x86.awk x86-opcode-map.txt > inat-tables.c
 
 #
 # Usage: awk -f gen-insn-attr-x86.awk x86-opcode-map.txt > inat-tables.c
 

+# Awk implementation sanity check
+function check_awk_implement() {
+       if (!match("abc", "[[:lower:]]+"))
+               return "Your awk doesn't support charactor-class."
+       if (sprintf("%x", 0) != "0")
+               return "Your awk has a printf-format problem."
+       return ""
+}
+

 BEGIN {
 BEGIN {

+       # Implementation error checking
+       awkchecked = check_awk_implement()
+       if (awkchecked != "") {
+               print "Error: " awkchecked > "/dev/stderr"
+               print "Please try to use gawk." > "/dev/stderr"
+               exit 1
+       }
+
+       # Setup generating tables

        print "/* x86 opcode map generated from x86-opcode-map.txt */"
        print "/* Do not change this code. */"
        ggid = 1
        print "/* x86 opcode map generated from x86-opcode-map.txt */"
        print "/* Do not change this code. */"
        ggid = 1


@@ -293,6 +311,8 @@ function convert_operands(opnd,       i,imm,mod)
 }
 
 END {
 }
 
 END {

+       if (awkchecked != "")
+               exit 1

        # print escape opcode map's array
        print "/* Escape opcode map array */"
        print "const insn_attr_t const *inat_escape_tables[INAT_ESC_MAX + 1]" \
        # print escape opcode map's array
        print "/* Escape opcode map array */"
        print "const insn_attr_t const *inat_escape_tables[INAT_ESC_MAX + 1]" \