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Commit 726799a4 authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'sparc-syscall-gen'

Firoz Khan says:

====================
sparc: system call table generation support

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.
	- Compat entry name, if required.

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 xtensa. 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.

Changes since v2:
 - changed from generic-y to generated-y in Kbuild.
 - added io_pgetevents entry in the syscall.tbl.
 - updated the compat system call table.

Changes since v1:
 - optimized/updated the syscall table generation
   scripts.
 - fixed all mixed indentation issues in syscall.tbl.
 - added "comments" in syscall.tbl.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 20a9da34 36800330
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@@ -81,6 +81,9 @@ install:
archclean:
	$(Q)$(MAKE) $(clean)=$(boot)

archheaders:
	$(Q)$(MAKE) $(build)=arch/sparc/kernel/syscalls all

PHONY += vdso_install
vdso_install:
	$(Q)$(MAKE) $(build)=arch/sparc/vdso $@
+3 −1
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# User exported sparc header files


generated-y += syscall_table_32.h
generated-y += syscall_table_64.h
generated-y += syscall_table_c32.h
generic-y += div64.h
generic-y += emergency-restart.h
generic-y += exec.h
+18 −0
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@@ -17,6 +17,8 @@

#include <uapi/asm/unistd.h>

#define NR_syscalls	__NR_syscalls

#ifdef __32bit_syscall_numbers__
#else
#define __NR_time		231 /* Linux sparc32                               */
@@ -46,4 +48,20 @@
#define __ARCH_WANT_COMPAT_SYS_SENDFILE
#endif

#ifdef __32bit_syscall_numbers__
/* Sparc 32-bit only has the "setresuid32", "getresuid32" variants,
 * it never had the plain ones and there is no value to adding those
 * old versions into the syscall table.
 */
#define __IGNORE_setresuid
#define __IGNORE_getresuid
#define __IGNORE_setresgid
#define __IGNORE_getresgid
#endif

/* Sparc doesn't have protection keys. */
#define __IGNORE_pkey_mprotect
#define __IGNORE_pkey_alloc
#define __IGNORE_pkey_free

#endif /* _SPARC_UNISTD_H */
+2 −0
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# UAPI Header export list
include include/uapi/asm-generic/Kbuild.asm

generated-y += unistd_32.h
generated-y += unistd_64.h
generic-y += bpf_perf_event.h
generic-y += types.h
+3 −423

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