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X-Original-Sender: riku.voipio@linaro.org X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of patch+caf_=patchwork-forward=linaro.org@linaro.org designates 209.85.128.169 as permitted sender) smtp.mail=patch+caf_=patchwork-forward=linaro.org@linaro.org Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org X-Google-Group-Id: 836684582541 From: Riku Voipio Remove "if(__get_user" checks and their related error paths for all architecture's do_sigreturn. Remove the unlock_user_struct when the only way to end up there is from failed lock_user_struct. v3: remove unneccesary sigsegv label as suggested by Peter Signed-off-by: Riku Voipio Reviewed-by: Peter Maydell --- linux-user/signal.c | 59 ++++++++++++++++------------------------------------- 1 file changed, 18 insertions(+), 41 deletions(-) diff --git a/linux-user/signal.c b/linux-user/signal.c index f55076d..5b43410 100644 --- a/linux-user/signal.c +++ b/linux-user/signal.c @@ -1096,11 +1096,9 @@ long do_sigreturn(CPUX86State *env) if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) goto badframe; /* set blocked signals */ - if (__get_user(target_set.sig[0], &frame->sc.oldmask)) - goto badframe; + __get_user(target_set.sig[0], &frame->sc.oldmask); for(i = 1; i < TARGET_NSIG_WORDS; i++) { - if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) - goto badframe; + __get_user(target_set.sig[i], &frame->extramask[i - 1]); } target_to_host_sigset_internal(&set, &target_set); @@ -1896,12 +1894,10 @@ static long do_sigreturn_v1(CPUARMState *env) if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) goto badframe; - if (__get_user(set.sig[0], &frame->sc.oldmask)) - goto badframe; - for(i = 1; i < TARGET_NSIG_WORDS; i++) { - if (__get_user(set.sig[i], &frame->extramask[i - 1])) - goto badframe; - } + __get_user(set.sig[0], &frame->sc.oldmask); + for(i = 1; i < TARGET_NSIG_WORDS; i++) { + __get_user(set.sig[i], &frame->extramask[i - 1]); + } target_to_host_sigset_internal(&host_set, &set); do_sigprocmask(SIG_SETMASK, &host_set, NULL); @@ -1918,7 +1914,6 @@ static long do_sigreturn_v1(CPUARMState *env) return env->regs[0]; badframe: - unlock_user_struct(frame, frame_addr, 0); force_sig(TARGET_SIGSEGV /* , current */); return 0; } @@ -2985,8 +2980,7 @@ long do_sigreturn(CPUMIPSState *regs) goto badframe; for(i = 0; i < TARGET_NSIG_WORDS; i++) { - if(__get_user(target_set.sig[i], &frame->sf_mask.sig[i])) - goto badframe; + __get_user(target_set.sig[i], &frame->sf_mask.sig[i]); } target_to_host_sigset_internal(&blocked, &target_set); @@ -3627,11 +3621,9 @@ long do_sigreturn(CPUMBState *env) goto badframe; /* Restore blocked signals */ - if (__get_user(target_set.sig[0], &frame->uc.tuc_mcontext.oldmask)) - goto badframe; + __get_user(target_set.sig[0], &frame->uc.tuc_mcontext.oldmask); for(i = 1; i < TARGET_NSIG_WORDS; i++) { - if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) - goto badframe; + __get_user(target_set.sig[i], &frame->extramask[i - 1]); } target_to_host_sigset_internal(&set, &target_set); do_sigprocmask(SIG_SETMASK, &set, NULL); @@ -3644,7 +3636,6 @@ long do_sigreturn(CPUMBState *env) unlock_user_struct(frame, frame_addr, 0); return env->regs[10]; badframe: - unlock_user_struct(frame, frame_addr, 0); force_sig(TARGET_SIGSEGV); } @@ -3802,11 +3793,9 @@ long do_sigreturn(CPUCRISState *env) goto badframe; /* Restore blocked signals */ - if (__get_user(target_set.sig[0], &frame->sc.oldmask)) - goto badframe; + __get_user(target_set.sig[0], &frame->sc.oldmask); for(i = 1; i < TARGET_NSIG_WORDS; i++) { - if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) - goto badframe; + __get_user(target_set.sig[i], &frame->extramask[i - 1]); } target_to_host_sigset_internal(&set, &target_set); do_sigprocmask(SIG_SETMASK, &set, NULL); @@ -3815,7 +3804,6 @@ long do_sigreturn(CPUCRISState *env) unlock_user_struct(frame, frame_addr, 0); return env->regs[10]; badframe: - unlock_user_struct(frame, frame_addr, 0); force_sig(TARGET_SIGSEGV); } @@ -4323,9 +4311,7 @@ long do_sigreturn(CPUS390XState *env) if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) { goto badframe; } - if (__get_user(target_set.sig[0], &frame->sc.oldmask[0])) { - goto badframe; - } + __get_user(target_set.sig[0], &frame->sc.oldmask[0]); target_to_host_sigset_internal(&set, &target_set); do_sigprocmask(SIG_SETMASK, &set, NULL); /* ~_BLOCKABLE? */ @@ -4338,7 +4324,6 @@ long do_sigreturn(CPUS390XState *env) return env->regs[2]; badframe: - unlock_user_struct(frame, frame_addr, 0); force_sig(TARGET_SIGSEGV); return 0; } @@ -4879,15 +4864,13 @@ long do_sigreturn(CPUPPCState *env) #if defined(TARGET_PPC64) set.sig[0] = sc->oldmask + ((long)(sc->_unused[3]) << 32); #else - if(__get_user(set.sig[0], &sc->oldmask) || - __get_user(set.sig[1], &sc->_unused[3])) - goto sigsegv; + __get_user(set.sig[0], &sc->oldmask); + __get_user(set.sig[1], &sc->_unused[3]); #endif target_to_host_sigset_internal(&blocked, &set); do_sigprocmask(SIG_SETMASK, &blocked, NULL); - if (__get_user(sr_addr, &sc->regs)) - goto sigsegv; + __get_user(sr_addr, &sc->regs); if (!lock_user_struct(VERIFY_READ, sr, sr_addr, 1)) goto sigsegv; if (restore_user_regs(env, sr, 1)) @@ -5281,12 +5264,10 @@ long do_sigreturn(CPUM68KState *env) /* set blocked signals */ - if (__get_user(target_set.sig[0], &frame->sc.sc_mask)) - goto badframe; + __get_user(target_set.sig[0], &frame->sc.sc_mask); for(i = 1; i < TARGET_NSIG_WORDS; i++) { - if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) - goto badframe; + __get_user(target_set.sig[i], &frame->extramask[i - 1]); } target_to_host_sigset_internal(&set, &target_set); @@ -5300,7 +5281,6 @@ long do_sigreturn(CPUM68KState *env) return d0; badframe: - unlock_user_struct(frame, frame_addr, 0); force_sig(TARGET_SIGSEGV); return 0; } @@ -5555,9 +5535,7 @@ long do_sigreturn(CPUAlphaState *env) } target_sigemptyset(&target_set); - if (__get_user(target_set.sig[0], &sc->sc_mask)) { - goto badframe; - } + __get_user(target_set.sig[0], &sc->sc_mask); target_to_host_sigset_internal(&set, &target_set); do_sigprocmask(SIG_SETMASK, &set, NULL); @@ -5567,7 +5545,6 @@ long do_sigreturn(CPUAlphaState *env) return env->ir[IR_V0]; badframe: - unlock_user_struct(sc, sc_addr, 0); force_sig(TARGET_SIGSEGV); }