linux-user, mips: add syscall table generation support

Copy syscall.tbl and syscallhdr.sh from linux/arch/mips/kernel/syscalls/syscall_o32.tbl v5.5
Update syscallhdr.sh to generate QEMU syscall_nr.h
Move the offset (4000) from the file to the Makefile.objs to be passed
to syscallhdr.sh
Rename on the fly fadvise64 to fadvise64_64.

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Taylor Simpson <tsimpson@quicinc.com>
Message-Id: <20200310103403.3284090-17-laurent@vivier.eu>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

1 files changed, 36 insertions, 0 deletions

diff --git a/linux-user/mips/syscallhdr.sh b/linux-user/mips/syscallhdr.sh
new file mode 100644
index 0000000000..761e3e47dd
--- /dev/null
+++ b/linux-user/mips/syscallhdr.sh
@@ -0,0 +1,36 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+in="$1"
+out="$2"
+my_abis=`echo "($3)" | tr ',' '|'`
+prefix="$4"
+offset="$5"
+
+fileguard=LINUX_USER_MIPS_`basename "$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 | (
+    printf "#ifndef %s\n" "${fileguard}"
+    printf "#define %s\n" "${fileguard}"
+    printf "\n"
+
+    nxt=0
+    while read nr abi name entry compat ; do
+        if [ "$name" = "fadvise64" ] ; then
+            name="fadvise64_64"
+        fi
+        if [ -z "$offset" ]; then
+            printf "#define TARGET_NR_%s%s\t%s\n" \
+                "${prefix}" "${name}" "${nr}"
+        else
+            printf "#define TARGET_NR_%s%s\t(%s + %s)\n" \
+                "${prefix}" "${name}" "${offset}" "${nr}"
+        fi
+        nxt=$((nr+1))
+    done
+
+    printf "\n"
+    printf "#endif /* %s */" "${fileguard}"
+    printf "\n"
+) > "$out"