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Commit 9d6d99e3 authored by Heiko Carstens's avatar Heiko Carstens Committed by Martin Schwidefsky
Browse files

s390: wire up rseq system call 



Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 8bf93550

arch/s390/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -160,6 +160,7 @@ config S390 
	select HAVE_OPROFILE

	select HAVE_PERF_EVENTS

	select HAVE_REGS_AND_STACK_ACCESS_API

	select HAVE_RSEQ

	select HAVE_SYSCALL_TRACEPOINTS

	select HAVE_VIRT_CPU_ACCOUNTING

	select MODULES_USE_ELF_RELA

arch/s390/kernel/compat_wrapper.c

+1 −0
Original line number Diff line number Diff line
@@ -183,3 +183,4 @@ COMPAT_SYSCALL_WRAP2(s390_guarded_storage, int, command, struct gs_cb *, gs_cb); 
COMPAT_SYSCALL_WRAP5(statx, int, dfd, const char __user *, path, unsigned, flags, unsigned, mask, struct statx __user *, buffer);

COMPAT_SYSCALL_WRAP4(s390_sthyi, unsigned long, code, void __user *, info, u64 __user *, rc, unsigned long, flags);

COMPAT_SYSCALL_WRAP5(kexec_file_load, int, kernel_fd, int, initrd_fd, unsigned long, cmdline_len, const char __user *, cmdline_ptr, unsigned long, flags)

COMPAT_SYSCALL_WRAP4(rseq, struct rseq __user *, rseq, u32, rseq_len, int, flags, u32, sig)

arch/s390/kernel/entry.S

+4 −0
Original line number Diff line number Diff line
@@ -357,6 +357,10 @@ ENTRY(system_call) 
	stg	%r2,__PT_R2(%r11)		# store return value



.Lsysc_return:

#ifdef CONFIG_DEBUG_RSEQ

	lgr	%r2,%r11

	brasl	%r14,rseq_syscall

#endif

	LOCKDEP_SYS_EXIT

.Lsysc_tif:

	TSTMSK	__PT_FLAGS(%r11),_PIF_WORK

arch/s390/kernel/signal.c

+2 −1
Original line number Diff line number Diff line
@@ -498,7 +498,7 @@ void do_signal(struct pt_regs *regs) 
		}

		/* No longer in a system call */

		clear_pt_regs_flag(regs, PIF_SYSCALL);



		rseq_signal_deliver(&ksig, regs);

		if (is_compat_task())

			handle_signal32(&ksig, oldset, regs);

		else
@@ -537,4 +537,5 @@ void do_notify_resume(struct pt_regs *regs) 
{

	clear_thread_flag(TIF_NOTIFY_RESUME);

	tracehook_notify_resume(regs);

	rseq_handle_notify_resume(NULL, regs);

}

arch/s390/kernel/syscalls/syscall.tbl

+1 −0
Original line number Diff line number Diff line
@@ -390,3 +390,4 @@ 
380  common	s390_sthyi		sys_s390_sthyi			compat_sys_s390_sthyi

381  common	kexec_file_load		sys_kexec_file_load		compat_sys_kexec_file_load

382  common	io_pgetevents		sys_io_pgetevents		compat_sys_io_pgetevents

383  common	rseq			sys_rseq			compat_sys_rseq