The system call tables are in different format in all
architecture and it will be difficult to manually add or
modify the system calls in the respective files. To make
it easy by keeping a script and which will generate the
uapi header and syscall table file. This change will also
help to unify the implementation across all architectures.
The system call table generation script is added in
syscalls directory which contain the script to generate
both uapi header file and system call table files.
The syscall.tbl file will be the input for the scripts.
syscall.tbl contains the list of available system calls
along with system call number and corresponding entry point.
Add a new system call in this architecture 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.
- Compat entry name, if required.
syscallhdr.sh and syscalltbl.sh will generate uapi header-
unistd_32/64.h and syscall_table_32/64/c32.h files respect-
ively. File syscall_table_32/64/c32.h is included by sys-
call.S - the real system call table. Both .sh files will
parse the content syscall.tbl to generate the header and
table files.
ARM, s390 and x86 architecuture does have the similar support.
I leverage their implementation to come up with a generic
solution.
Signed-off-by: Firoz Khan
---
arch/powerpc/kernel/syscalls/Makefile | 61 +
arch/powerpc/kernel/syscalls/syscall.tbl | 408 +
arch/powerpc/kernel/syscalls/syscallhdr.sh | 36 +++
arch/powerpc/kernel/syscalls/syscalltbl.sh | 41 +++
4 files changed, 546 insertions(+)
create mode 100644 arch/powerpc/kernel/syscalls/Makefile
create mode 100644 arch/powerpc/kernel/syscalls/syscall.tbl
create mode 100644 arch/powerpc/kernel/syscalls/syscallhdr.sh
create mode 100644 arch/powerpc/kernel/syscalls/syscalltbl.sh
diff --git a/arch/powerpc/kernel/syscalls/Makefile
b/arch/powerpc/kernel/syscalls/Makefile
new file mode 100644
index 000..6615c24
--- /dev/null
+++ b/arch/powerpc/kernel/syscalls/Makefile
@@ -0,0 +1,61 @@
+# SPDX-License-Identifier: GPL-2.0
+kapi := arch/$(SRCARCH)/include/generated/asm
+uapi := arch/$(SRCARCH)/include/generated/uapi/asm
+
+_dummy := $(shell [ -d '$(uapi)' ] || mkdir -p '$(uapi)') \
+ $(shell [ -d '$(kapi)' ] || mkdir -p '$(kapi)')
+
+syscall := $(srctree)/$(src)/syscall.tbl
+syshdr := $(srctree)/$(src)/syscallhdr.sh
+systbl := $(srctree)/$(src)/syscalltbl.sh
+
+quiet_cmd_syshdr = SYSHDR $@
+ cmd_syshdr = $(CONFIG_SHELL) '$(syshdr)' '$<' '$@' \
+ '$(syshdr_abis_$(basetarget))' \
+ '$(syshdr_pfx_$(basetarget))'\
+ '$(syshdr_offset_$(basetarget))'
+
+quiet_cmd_systbl = SYSTBL $@
+ cmd_systbl = $(CONFIG_SHELL) '$(systbl)' '$<' '$@' \
+ '$(systbl_abis_$(basetarget))' \
+ '$(systbl_abi_$(basetarget))'\
+ '$(systbl_offset_$(basetarget))'
+
+syshdr_abis_unistd_32 := common,32
+$(uapi)/unistd_32.h: $(syscall) $(syshdr)
+ $(call if_changed,syshdr)
+
+syshdr_abis_unistd_64 := common,64
+$(uapi)/unistd_64.h: $(syscall) $(syshdr)
+ $(call if_changed,syshdr)
+
+systbl_abis_syscall_table_32 := common,32
+$(kapi)/syscall_table_32.h: $(syscall) $(systbl)
+ $(call if_changed,systbl)
+
+systbl_abis_syscall_table_64 := common,64
+$(kapi)/syscall_table_64.h: $(syscall) $(systbl)
+ $(call if_changed,systbl)
+
+systbl_abis_syscall_table_c32 := common,32
+systbl_abi_syscall_table_c32 := c32
+$(kapi)/syscall_table_c32.h: $(syscall) $(systbl)
+ $(call if_changed,systbl)
+
+systbl_abis_syscall_table_spu := common,32
+systbl_abi_syscall_table_spu := spu
+$(kapi)/syscall_table_spu.h: $(syscall) $(systbl)
+ $(call if_changed,systbl)
+
+uapisyshdr-y += unistd_32.h unistd_64.h
+kapisyshdr-y += syscall_table_32.h \
+ syscall_table_64.h \
+ syscall_table_c32.h \
+ syscall_table_spu.h
+
+targets+= $(uapisyshdr-y) $(kapisyshdr-y)
+
+PHONY += all
+all: $(addprefix $(uapi)/,$(uapisyshdr-y))
+all: $(addprefix $(kapi)/,$(kapisyshdr-y))
+ @:
diff --git a/arch/powerpc/kernel/syscalls/syscall.tbl
b/arch/powerpc/kernel/syscalls/syscall.tbl
new file mode 100644
index 000..4d90f30
--- /dev/null
+++ b/arch/powerpc/kernel/syscalls/syscall.tbl
@@ -0,0 +1,408 @@
+# SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
+#
+# system call numbers and entry vectors for powerpc
+#
+# The format is:
+#
+#
+# The can be common, 64, or 32 for this file.
+#
+0 common restart_syscall sys_restart_syscall
sys_restart_syscall
+1 common exitsys_exit
sys
