mbox series

[v1,0/4] xtensa: system call table generation support

Message ID 1541080581-4072-1-git-send-email-firoz.khan@linaro.org
Headers show
Series xtensa: system call table generation support | expand

Message

Firoz Khan Nov. 1, 2018, 1:56 p.m. UTC
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.

ARM, s390 and x86 architecuture does exist the sim-
ilar support. I leverage their implementation to come
up with a generic solution.

I have done the same support for work for alpha, ia64,
m68k, microblaze, mips, parisc, powerpc, sh and sparc.
Below mentioned git repository contains more details 
about the workflow.

 https://github.com/frzkhn/system_call_table_generator/

Finally, this is the ground work to solve the Y2038
issue. We need to add two dozen of system calls to solve
Y2038 issue. So this patch series will help to add new 
system calls easily by adding new entry in the syscall.tbl.

Firoz Khan (4):
  xtensa: move SYS_XTENSA_* macros to non uapi header
  xtensa: add __NR_syscalls along with __NR_syscall_count
  xtensa: add system call table generation support
  xtensa: generate uapi header and syscall table header files

 arch/xtensa/Makefile                      |   3 +
 arch/xtensa/include/asm/Kbuild            |   1 +
 arch/xtensa/include/asm/unistd.h          |  20 +
 arch/xtensa/include/uapi/asm/Kbuild       |   1 +
 arch/xtensa/include/uapi/asm/unistd.h     | 798 +-----------------------------
 arch/xtensa/kernel/syscall.c              |   5 +-
 arch/xtensa/kernel/syscalls/Makefile      |  38 ++
 arch/xtensa/kernel/syscalls/syscall.tbl   | 374 ++++++++++++++
 arch/xtensa/kernel/syscalls/syscallhdr.sh |  36 ++
 arch/xtensa/kernel/syscalls/syscalltbl.sh |  32 ++
 10 files changed, 510 insertions(+), 798 deletions(-)
 create mode 100644 arch/xtensa/kernel/syscalls/Makefile
 create mode 100644 arch/xtensa/kernel/syscalls/syscall.tbl
 create mode 100644 arch/xtensa/kernel/syscalls/syscallhdr.sh
 create mode 100644 arch/xtensa/kernel/syscalls/syscalltbl.sh

-- 
1.9.1

Comments

Max Filippov Nov. 6, 2018, 8:30 p.m. UTC | #1
On Thu, Nov 01, 2018 at 07:26:17PM +0530, 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. 

 
Do I understand it right that you're also planning to unify scripts
and makefile snippets used to generate headers, as they're not
architecture-specific?

> Firoz Khan (4):

>   xtensa: move SYS_XTENSA_* macros to non uapi header

>   xtensa: add __NR_syscalls along with __NR_syscall_count

>   xtensa: add system call table generation support

>   xtensa: generate uapi header and syscall table header files


Other than the two notes that I've posted to the individual patches
this series looks good to me.

-- 
Thanks.
-- Max