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Commit e34a6280 authored by Michael Holzheu's avatar Michael Holzheu Committed by Heiko Carstens
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[S390] Add missing compat system call wrappers. 



Add wrapper functions for the following compat system calls:
* readahead
* sendfile64
* tkill
* tgkill
* keyctl
This ensures that the high order bits of the parameter registers are correctly
sign extended.

Signed-off-by: default avatarMichael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
parent 179cb81a

arch/s390/kernel/compat_wrapper.S

+38 −0
Original line number Diff line number Diff line
@@ -1767,3 +1767,41 @@ sys_dup3_wrapper: 
sys_epoll_create1_wrapper:

	lgfr	%r2,%r2			# int

	jg	sys_epoll_create1	# branch to system call



	.globl	sys32_readahead_wrapper

sys32_readahead_wrapper:

	lgfr	%r2,%r2			# int

	llgfr	%r3,%r3			# u32

	llgfr	%r4,%r4			# u32

	lgfr	%r5,%r5			# s32

	jg	sys32_readahead		# branch to system call



	.globl	sys32_sendfile64_wrapper

sys32_sendfile64_wrapper:

	lgfr	%r2,%r2			# int

	lgfr	%r3,%r3			# int

	llgtr	%r4,%r4			# compat_loff_t *

	lgfr	%r5,%r5			# s32

	jg	sys32_sendfile64	# branch to system call



	.globl	sys_tkill_wrapper

sys_tkill_wrapper:

	lgfr	%r2,%r2			# pid_t

	lgfr	%r3,%r3			# int

	jg	sys_tkill		# branch to system call



	.globl	sys_tgkill_wrapper

sys_tgkill_wrapper:

	lgfr	%r2,%r2			# pid_t

	lgfr	%r3,%r3			# pid_t

	lgfr	%r4,%r4			# int

	jg	sys_tgkill		# branch to system call



	.globl	compat_sys_keyctl_wrapper

compat_sys_keyctl_wrapper:

	llgfr	%r2,%r2			# u32

	llgfr	%r3,%r3			# u32

	llgfr	%r4,%r4			# u32

	llgfr	%r5,%r5			# u32

	llgfr	%r6,%r6			# u32

	jg	compat_sys_keyctl	# branch to system call

arch/s390/kernel/syscalls.S

+5 −5
Original line number Diff line number Diff line
@@ -230,8 +230,8 @@ SYSCALL(sys_mincore,sys_mincore,sys32_mincore_wrapper) 
SYSCALL(sys_madvise,sys_madvise,sys32_madvise_wrapper)

SYSCALL(sys_getdents64,sys_getdents64,sys32_getdents64_wrapper)	/* 220 */

SYSCALL(sys_fcntl64,sys_ni_syscall,compat_sys_fcntl64_wrapper)

SYSCALL(sys_readahead,sys_readahead,sys32_readahead)

SYSCALL(sys_sendfile64,sys_ni_syscall,sys32_sendfile64)

SYSCALL(sys_readahead,sys_readahead,sys32_readahead_wrapper)

SYSCALL(sys_sendfile64,sys_ni_syscall,sys32_sendfile64_wrapper)

SYSCALL(sys_setxattr,sys_setxattr,sys32_setxattr_wrapper)

SYSCALL(sys_lsetxattr,sys_lsetxattr,sys32_lsetxattr_wrapper)	/* 225 */

SYSCALL(sys_fsetxattr,sys_fsetxattr,sys32_fsetxattr_wrapper)
@@ -245,11 +245,11 @@ SYSCALL(sys_removexattr,sys_removexattr,sys32_removexattr_wrapper) 
SYSCALL(sys_lremovexattr,sys_lremovexattr,sys32_lremovexattr_wrapper)

SYSCALL(sys_fremovexattr,sys_fremovexattr,sys32_fremovexattr_wrapper)	/* 235 */

SYSCALL(sys_gettid,sys_gettid,sys_gettid)

SYSCALL(sys_tkill,sys_tkill,sys_tkill)

SYSCALL(sys_tkill,sys_tkill,sys_tkill_wrapper)

SYSCALL(sys_futex,sys_futex,compat_sys_futex_wrapper)

SYSCALL(sys_sched_setaffinity,sys_sched_setaffinity,sys32_sched_setaffinity_wrapper)

SYSCALL(sys_sched_getaffinity,sys_sched_getaffinity,sys32_sched_getaffinity_wrapper)	/* 240 */

SYSCALL(sys_tgkill,sys_tgkill,sys_tgkill)

SYSCALL(sys_tgkill,sys_tgkill,sys_tgkill_wrapper)

NI_SYSCALL							/* reserved for TUX */

SYSCALL(sys_io_setup,sys_io_setup,sys32_io_setup_wrapper)

SYSCALL(sys_io_destroy,sys_io_destroy,sys32_io_destroy_wrapper)
@@ -288,7 +288,7 @@ SYSCALL(sys_mq_getsetattr,sys_mq_getsetattr,compat_sys_mq_getsetattr_wrapper) 
SYSCALL(sys_kexec_load,sys_kexec_load,compat_sys_kexec_load_wrapper)

SYSCALL(sys_add_key,sys_add_key,compat_sys_add_key_wrapper)

SYSCALL(sys_request_key,sys_request_key,compat_sys_request_key_wrapper)

SYSCALL(sys_keyctl,sys_keyctl,compat_sys_keyctl)		/* 280 */

SYSCALL(sys_keyctl,sys_keyctl,compat_sys_keyctl_wrapper)		/* 280 */

SYSCALL(sys_waitid,sys_waitid,compat_sys_waitid_wrapper)

SYSCALL(sys_ioprio_set,sys_ioprio_set,sys_ioprio_set_wrapper)

SYSCALL(sys_ioprio_get,sys_ioprio_get,sys_ioprio_get_wrapper)