While implementing a new syscall, we need to wire up it's number to the arch
table. Since syscall number 403, all architectures are on sync regarding the
number (except alpha), which make things a lot easier but more repetitive as
well. Have a look at commit b36d4b6aa88 ("arch: hookup listns() system call"),
with 15 lines of mostly:
+470 common listns sys_listns
There's already a "common" table shared with a bunch of archs at
`scripts/syscall.tbl`, but due to historical reasons some archs will never be
able to move to this table and share all the numbers.
The generic table starts from 403 (clock_gettime64), the first common syscall.
I've compile tested for arm32, arm64, s390, mips, sparc and alpha by comparing
the syscalls_*.h and unistd_*.h files generated before and after this patchset.
For most of cases the files are identical, for the few cases that they are not,
there's a note in the commit explaining why they are equivalent.
Thanks!
André
Changes in v4:
- Replace cln3 with clone3 in the ABIs
- mips: Get rid of custom mips ABIs (o32, n32, n64) and use 32 and 64
- mips: Unify n32 and n64 tables
- Add alpha to the syscall party, along with it's adaptations
- Remove --no-compat option and define SYSCALL_WITH_COMPAT() macro for archs
that need it
- v3: https://patch.msgid.link/20260807-tonyk-syscall_table-v3-0-7c45a23c50b5@igalia.com
Changes in v3:
- Removed x86 for now, let's wait till x32 is dropped
- Added much more archs
- v2: https://patch.msgid.link/20260727-tonyk-syscall_table-v2-0-95d4f1ee471f@igalia.com
Changes in v2:
- Managed to move to the real first common syscall: 403 (clock_gettime64)
- Added -no-compat option to be used with x86_64
- v1: https://patch.msgid.link/20260724-tonyk-syscall_table-v1-0-9c53188423da@igalia.com
---
André Almeida (12):
syscalls: Make --abis parsing more robust
syscalls: Create unified partial table for all archs
scripts/syscall.tbl: Use the common table
arm: Use the common syscall table
s390: Use the common syscall table
sparc: Use the common syscall table
mips: Remove duplicated syscallnr.sh
mips: Get rid of custom mips ABIs for syscall tables
mips: Use the common syscall table
syscalls: Add an option for offsetting the common table
alpha: Define entry point for set_mempolicy_home_node syscall
alpha: Use the common syscall table
arch/alpha/kernel/syscalls/Makefile | 10 +-
arch/alpha/kernel/syscalls/syscall.tbl | 48 --
arch/alpha/kernel/systbls.S | 1 +
arch/arm/tools/Makefile | 10 +-
arch/arm/tools/syscall.tbl | 68 ---
arch/arm64/tools/syscall_32.tbl | 68 ---
arch/mips/kernel/scall64-n32.S | 1 +
arch/mips/kernel/scall64-n64.S | 2 +
arch/mips/kernel/syscalls/Makefile | 31 +-
arch/mips/kernel/syscalls/syscall_n.tbl | 464 +++++++++++++++++
arch/mips/kernel/syscalls/syscall_n32.tbl | 412 ---------------
arch/mips/kernel/syscalls/syscall_n64.tbl | 388 --------------
arch/mips/kernel/syscalls/syscall_o32.tbl | 826 ++++++++++++++----------------
arch/mips/kernel/syscalls/syscallnr.sh | 26 -
arch/s390/kernel/syscall.c | 2 +
arch/s390/kernel/syscalls/Makefile | 8 +-
arch/s390/kernel/syscalls/syscall.tbl | 48 --
arch/sparc/kernel/syscalls/Makefile | 8 +-
arch/sparc/kernel/syscalls/syscall.tbl | 68 ---
scripts/Makefile.asm-headers | 9 +-
scripts/syscall.tbl | 68 ---
scripts/syscall_common.tbl | 84 +++
scripts/syscallhdr.sh | 79 ++-
scripts/syscalltbl.sh | 44 +-
24 files changed, 1083 insertions(+), 1690 deletions(-)
---
base-commit: 075b74841bd0065a3bda3440873c747938e69b68
change-id: 20260724-tonyk-syscall_table-928bbb1b26bb
Best regards,
--
André Almeida <andrealmeid@igalia.com>