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SubjectRe: [PATCH v7 0/5] parisc: system call table generation support
Hi Firoz,

> On Fri, 16 Nov 2018 at 01:01, Helge Deller <deller@gmx.de> wrote:
> >
> > On 14.11.2018 07:34, Firoz Khan wrote:
> > > The purpose of this patch series is, we can easily
> > > add/modify/delete system call table support by cha-
> > > nging entry in syscall.tbl file instead of manually
> > > changing many files. The other goal is to unify the
> > > system call table generation support implementation
> > > across all the architectures.
> > >
> > > The system call tables are in different format in
> > > all architecture. It will be difficult to manually
> > > add, modify or delete the system calls in the resp-
> > > ective files manually. To make it easy by keeping a
> > > script and which'll generate uapi header file and
> > > syscall table file.
> > >
> > > syscall.tbl contains the list of available system
> > > calls along with system call number and correspond-
> > > ing entry point. Add a new system call in this arch-
> > > itecture will be possible by adding new entry in the
> > > syscall.tbl file.
> > >
> > > Adding a new table entry consisting of:
> > > - System call number.
> > > - ABI.
> > > - System call name.
> > > - Entry point name.
> > >
> > > ....
> > > Firoz Khan (5):
> > > parisc: move __IGNORE* entries to non uapi header
> > > parisc: add __NR_syscalls along with __NR_Linux_syscalls
> > > parisc: add system call table generation support
> > > parisc: generate uapi header and system call table files
> > > parisc: syscalls: ignore nfsservctl for other architectures
> >
> > Firoz, you may add
> > Acked-by: Helge Deller <deller@gmx.de>
> > to the whole parisc series.
>
> Sure, will do.
> I'm on a vacation right now. will send mid next week.

That's ok, there is no urgency.

Actually, I noticed that the generated files unistd_32.h
and unistd_64.h do have the same contents, since on parisc
we keep the syscall numbers the same for 32- and 64-bit.
With that in mind, we can simply generate on unistd.h
file for both variants.

Additionally, in the past we had __NR_Linux defined (as 0)
because we initially wanted to support HP-UX syscalls as well,
with NR_Linux being an offset.
The idea to support HP-UX is long gone, so there is no
need to keep that define.

My patch below is on top of your series and cleans up both
items mentioned above.
I suggest you fold it into your patch series before sending
the next version.

Thanks,
Helge

> > > arch/parisc/Makefile | 3 +
> > > arch/parisc/include/asm/Kbuild | 3 +
> > > arch/parisc/include/asm/unistd.h | 8 +
> > > arch/parisc/include/uapi/asm/Kbuild | 2 +
> > > arch/parisc/include/uapi/asm/unistd.h | 382 +------------------------
> > > arch/parisc/kernel/syscall.S | 11 +-
> > > arch/parisc/kernel/syscall_table.S | 459 ------------------------------
> > > arch/parisc/kernel/syscalls/Makefile | 57 ++++
> > > arch/parisc/kernel/syscalls/syscall.tbl | 369 ++++++++++++++++++++++++
> > > arch/parisc/kernel/syscalls/syscallhdr.sh | 36 +++
> > > arch/parisc/kernel/syscalls/syscalltbl.sh | 36 +++
> > > scripts/checksyscalls.sh | 1 +
> > > 12 files changed, 531 insertions(+), 836 deletions(-)


diff --git a/arch/parisc/include/uapi/asm/Kbuild b/arch/parisc/include/uapi/asm/Kbuild
index d31b4261cafc..8fdc63ea83ee 100644
--- a/arch/parisc/include/uapi/asm/Kbuild
+++ b/arch/parisc/include/uapi/asm/Kbuild
@@ -1,8 +1,7 @@
# UAPI Header export list
include include/uapi/asm-generic/Kbuild.asm

-generated-y += unistd_32.h
-generated-y += unistd_64.h
+generated-y += unistd.h
generic-y += auxvec.h
generic-y += bpf_perf_event.h
generic-y += kvm_para.h
diff --git a/arch/parisc/include/uapi/asm/unistd.h b/arch/parisc/include/uapi/asm/unistd.h
deleted file mode 100644
index 6e31f58ad6b5..000000000000
--- a/arch/parisc/include/uapi/asm/unistd.h
+++ /dev/null
@@ -1,14 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#ifndef _UAPI_ASM_PARISC_UNISTD_H_
-#define _UAPI_ASM_PARISC_UNISTD_H_
-
-#define __NR_Linux 0
-#ifdef __LP64__
-#include <asm/unistd_64.h>
-#else
-#include <asm/unistd_32.h>
-#endif
-
-#define LINUX_GATEWAY_ADDR 0x100
-
-#endif /* _UAPI_ASM_PARISC_UNISTD_H_ */
diff --git a/arch/parisc/kernel/syscalls/Makefile b/arch/parisc/kernel/syscalls/Makefile
index defa8878f6d2..f938acd26145 100644
--- a/arch/parisc/kernel/syscalls/Makefile
+++ b/arch/parisc/kernel/syscalls/Makefile
@@ -12,23 +12,15 @@ systbl := $(srctree)/$(src)/syscalltbl.sh
quiet_cmd_syshdr = SYSHDR $@
cmd_syshdr = $(CONFIG_SHELL) '$(syshdr)' '$<' '$@' \
'$(syshdr_abis_$(basetarget))' \
- '$(syshdr_pfx_$(basetarget))' \
- '$(syshdr_offset_$(basetarget))'
+ '$(syshdr_pfx_$(basetarget))'

quiet_cmd_systbl = SYSTBL $@
cmd_systbl = $(CONFIG_SHELL) '$(systbl)' '$<' '$@' \
'$(systbl_abis_$(basetarget))' \
- '$(systbl_abi_$(basetarget))' \
- '$(systbl_offset_$(basetarget))'
+ '$(systbl_abi_$(basetarget))'

syshdr_abis_unistd_32 := common,32
-syshdr_offset_unistd_32 := __NR_Linux
-$(uapi)/unistd_32.h: $(syscall) $(syshdr)
- $(call if_changed,syshdr)
-
-syshdr_abis_unistd_64 := common,64
-syshdr_offset_unistd_64 := __NR_Linux
-$(uapi)/unistd_64.h: $(syscall) $(syshdr)
+$(uapi)/unistd.h: $(syscall) $(syshdr)
$(call if_changed,syshdr)

systbl_abis_syscall_table_32 := common,32
@@ -44,7 +36,7 @@ systbl_abi_syscall_table_c32 := c32
$(kapi)/syscall_table_c32.h: $(syscall) $(systbl)
$(call if_changed,systbl)

-uapisyshdr-y += unistd_32.h unistd_64.h
+uapisyshdr-y += unistd.h
kapisyshdr-y += syscall_table_32.h \
syscall_table_64.h \
syscall_table_c32.h
diff --git a/arch/parisc/kernel/syscalls/syscallhdr.sh b/arch/parisc/kernel/syscalls/syscallhdr.sh
index 50242b747d7c..2305707898aa 100644
--- a/arch/parisc/kernel/syscalls/syscallhdr.sh
+++ b/arch/parisc/kernel/syscalls/syscallhdr.sh
@@ -5,7 +5,6 @@ in="$1"
out="$2"
my_abis=`echo "($3)" | tr ',' '|'`
prefix="$4"
-offset="$5"

fileguard=_UAPI_ASM_PARISC_`basename "$out" | sed \
-e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' \
@@ -17,13 +16,8 @@ grep -E "^[0-9A-Fa-fXx]+[[:space:]]+${my_abis}" "$in" | sort -n | (

nxt=0
while read nr abi name entry compat ; do
- if [ -z "$offset" ]; then
- printf "#define __NR_%s%s\t%s\n" \
- "${prefix}" "${name}" "${nr}"
- else
- printf "#define __NR_%s%s\t(%s + %s)\n" \
- "${prefix}" "${name}" "${offset}" "${nr}"
- fi
+ printf "#define __NR_%s%s\t%s\n" \
+ "${prefix}" "${name}" "${nr}"
nxt=$((nr+1))
done

@@ -32,5 +26,7 @@ grep -E "^[0-9A-Fa-fXx]+[[:space:]]+${my_abis}" "$in" | sort -n | (
printf "#define __NR_syscalls\t%s\n" "${nxt}"
printf "#endif\n"
printf "\n"
+ printf "#define LINUX_GATEWAY_ADDR\t0x100\n"
+ printf "\n"
printf "#endif /* %s */" "${fileguard}"
) > "$out"
diff --git a/arch/parisc/kernel/syscalls/syscalltbl.sh b/arch/parisc/kernel/syscalls/syscalltbl.sh
index 45b5bae26240..7627f2d77f61 100644
--- a/arch/parisc/kernel/syscalls/syscalltbl.sh
+++ b/arch/parisc/kernel/syscalls/syscalltbl.sh
@@ -5,7 +5,7 @@ in="$1"
out="$2"
my_abis=`echo "($3)" | tr ',' '|'`
my_abi="$4"
-offset="$5"
+offset=""

emit() {
t_nxt="$1"
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