From patchwork Tue Jun 10 13:20:34 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Riku Voipio X-Patchwork-Id: 357931 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id DFB811400E2 for ; Tue, 10 Jun 2014 23:25:24 +1000 (EST) Received: from localhost ([::1]:39778 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WuM3G-00084P-Po for incoming@patchwork.ozlabs.org; Tue, 10 Jun 2014 09:25:22 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53748) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WuLyz-0000Lg-KK for qemu-devel@nongnu.org; Tue, 10 Jun 2014 09:21:04 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WuLyp-0007a3-KK for qemu-devel@nongnu.org; Tue, 10 Jun 2014 09:20:57 -0400 Received: from [2001:4b98:dc0:45:216:3eff:fe3d:166f] (port=56221 helo=afflict.kos.to) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WuLyp-0007ZQ-B5 for qemu-devel@nongnu.org; Tue, 10 Jun 2014 09:20:47 -0400 Received: from afflict.kos.to (afflict [92.243.29.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by afflict.kos.to (Postfix) with ESMTPSA id 3D62726544; Tue, 10 Jun 2014 15:20:45 +0200 (CEST) From: riku.voipio@linaro.org To: qemu-devel@nongnu.org Date: Tue, 10 Jun 2014 16:20:34 +0300 Message-Id: <3907fea75e0b37e97e469cf3fd4155f6e7db5946.1402405819.git.riku.voipio@linaro.org> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: References: X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 2001:4b98:dc0:45:216:3eff:fe3d:166f Cc: Riku Voipio Subject: [Qemu-devel] [PATCH v3 05/13] signal/all: remove return value from restore_sigcontext X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Riku Voipio make most implementations of restore_sigcontext void and remove checking it's return value from functions calling restore_sigcontext. The exception is the X86 version of the function that is too different from others to deal in this way, and arm version, to keep possibility of erroring out from failed valid_user_regs. v3: keep arm valid_user_regs for filling in near future. Signed-off-by: Riku Voipio Reviewed-by: Peter Maydell --- linux-user/signal.c | 43 ++++++++++++------------------------------- 1 file changed, 12 insertions(+), 31 deletions(-) diff --git a/linux-user/signal.c b/linux-user/signal.c index b59ec3d..827638b 100644 --- a/linux-user/signal.c +++ b/linux-user/signal.c @@ -2889,10 +2889,9 @@ static inline void setup_sigcontext(CPUMIPSState *regs, } } -static inline int +static inline void restore_sigcontext(CPUMIPSState *regs, struct target_sigcontext *sc) { - int err = 0; int i; __get_user(regs->CP0_EPC, &sc->sc_pc); @@ -2919,8 +2918,6 @@ restore_sigcontext(CPUMIPSState *regs, struct target_sigcontext *sc) for (i = 0; i < 32; ++i) { __get_user(regs->active_fpu.fpr[i].d, &sc->sc_fpregs[i]); } - - return err; } /* @@ -3031,8 +3028,7 @@ long do_sigreturn(CPUMIPSState *regs) target_to_host_sigset_internal(&blocked, &target_set); do_sigprocmask(SIG_SETMASK, &blocked, NULL); - if (restore_sigcontext(regs, &frame->sf_sc)) - goto badframe; + restore_sigcontext(regs, &frame->sf_sc); #if 0 /* @@ -3135,8 +3131,7 @@ long do_rt_sigreturn(CPUMIPSState *env) target_to_host_sigset(&blocked, &frame->rs_uc.tuc_sigmask); do_sigprocmask(SIG_SETMASK, &blocked, NULL); - if (restore_sigcontext(env, &frame->rs_uc.tuc_mcontext)) - goto badframe; + restore_sigcontext(env, &frame->rs_uc.tuc_mcontext); if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe, rs_uc.tuc_stack), @@ -3249,10 +3244,9 @@ static void setup_sigcontext(struct target_sigcontext *sc, __put_user(mask, &sc->oldmask); } -static int restore_sigcontext(CPUSH4State *regs, struct target_sigcontext *sc, +static void restore_sigcontext(CPUSH4State *regs, struct target_sigcontext *sc, target_ulong *r0_p) { - unsigned int err = 0; int i; #define COPY(x) __get_user(regs->x, &sc->sc_##x) @@ -3277,7 +3271,6 @@ static int restore_sigcontext(CPUSH4State *regs, struct target_sigcontext *sc, regs->tra = -1; /* disable syscall checks */ __get_user(*r0_p, &sc->sc_gregs[0]); - return err; } static void setup_frame(int sig, struct target_sigaction *ka, @@ -3422,8 +3415,7 @@ long do_sigreturn(CPUSH4State *regs) target_to_host_sigset_internal(&blocked, &target_set); do_sigprocmask(SIG_SETMASK, &blocked, NULL); - if (restore_sigcontext(regs, &frame->sc, &r0)) - goto badframe; + restore_sigcontext(regs, &frame->sc, &r0); unlock_user_struct(frame, frame_addr, 0); return r0; @@ -3451,8 +3443,7 @@ long do_rt_sigreturn(CPUSH4State *regs) target_to_host_sigset(&blocked, &frame->uc.tuc_sigmask); do_sigprocmask(SIG_SETMASK, &blocked, NULL); - if (restore_sigcontext(regs, &frame->uc.tuc_mcontext, &r0)) - goto badframe; + restore_sigcontext(regs, &frame->uc.tuc_mcontext, &r0); if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe, uc.tuc_stack), @@ -5086,10 +5077,9 @@ static void setup_sigcontext(struct target_sigcontext *sc, CPUM68KState *env, __put_user(env->pc, &sc->sc_pc); } -static int +static void restore_sigcontext(CPUM68KState *env, struct target_sigcontext *sc, int *pd0) { - int err = 0; int temp; __get_user(env->aregs[7], &sc->sc_usp); @@ -5101,8 +5091,6 @@ restore_sigcontext(CPUM68KState *env, struct target_sigcontext *sc, int *pd0) env->sr = (env->sr & 0xff00) | (temp & 0xff); *pd0 = tswapl(sc->sc_d0); - - return err; } /* @@ -5342,8 +5330,7 @@ long do_sigreturn(CPUM68KState *env) /* restore registers */ - if (restore_sigcontext(env, &frame->sc, &d0)) - goto badframe; + restore_sigcontext(env, &frame->sc, &d0); unlock_user_struct(frame, frame_addr, 0); return d0; @@ -5461,11 +5448,11 @@ static void setup_sigcontext(struct target_sigcontext *sc, CPUAlphaState *env, __put_user(0, &sc->sc_traparg_a2); /* FIXME */ } -static int restore_sigcontext(CPUAlphaState *env, +static void restore_sigcontext(CPUAlphaState *env, struct target_sigcontext *sc) { uint64_t fpcr; - int i, err = 0; + int i; __get_user(env->pc, &sc->sc_pc); @@ -5478,8 +5465,6 @@ static int restore_sigcontext(CPUAlphaState *env, __get_user(fpcr, &sc->sc_fpcr); cpu_alpha_store_fpcr(env, fpcr); - - return err; } static inline abi_ulong get_sigframe(struct target_sigaction *sa, @@ -5613,9 +5598,7 @@ long do_sigreturn(CPUAlphaState *env) target_to_host_sigset_internal(&set, &target_set); do_sigprocmask(SIG_SETMASK, &set, NULL); - if (restore_sigcontext(env, sc)) { - goto badframe; - } + restore_sigcontext(env, sc); unlock_user_struct(sc, sc_addr, 0); return env->ir[IR_V0]; @@ -5636,9 +5619,7 @@ long do_rt_sigreturn(CPUAlphaState *env) target_to_host_sigset(&set, &frame->uc.tuc_sigmask); do_sigprocmask(SIG_SETMASK, &set, NULL); - if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) { - goto badframe; - } + restore_sigcontext(env, &frame->uc.tuc_mcontext); if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe, uc.tuc_stack), 0, env->ir[IR_SP]) == -EFAULT) {