From 47405ab642101c8ea0472ae434ab4bd2bc1fa41f Mon Sep 17 00:00:00 2001 From: Timothy E Baldwin Date: Thu, 12 May 2016 18:47:40 +0100 Subject: linux-user: Support for restarting system calls for S390 targets Update the S390 main loop and sigreturn code: * on TARGET_ERESTARTSYS, wind guest PC backwards to repeat syscall insn * set all guest CPU state within signal.c code on sigreturn * handle TARGET_QEMU_ESIGRETURN in the main loop as the indication that the main loop should not touch any guest CPU state Signed-off-by: Timothy Edward Baldwin Message-id: 1441497448-32489-33-git-send-email-T.E.Baldwin99@members.leeds.ac.uk Reviewed-by: Peter Maydell [PMM: tweak commit message; remove stray double semicolon; drop TARGET_USE_ERESTARTSYS define] Signed-off-by: Peter Maydell Signed-off-by: Riku Voipio --- linux-user/signal.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'linux-user/signal.c') diff --git a/linux-user/signal.c b/linux-user/signal.c index 3eea6b7981..51e11c14fb 100644 --- a/linux-user/signal.c +++ b/linux-user/signal.c @@ -4280,7 +4280,7 @@ long do_sigreturn(CPUS390XState *env) } unlock_user_struct(frame, frame_addr, 0); - return env->regs[2]; + return -TARGET_QEMU_ESIGRETURN; badframe: force_sig(TARGET_SIGSEGV); @@ -4310,7 +4310,7 @@ long do_rt_sigreturn(CPUS390XState *env) goto badframe; } unlock_user_struct(frame, frame_addr, 0); - return env->regs[2]; + return -TARGET_QEMU_ESIGRETURN; badframe: unlock_user_struct(frame, frame_addr, 0); -- cgit v1.2.3