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authorPeter Maydell <peter.maydell@linaro.org>2018-11-15 11:46:16 +0000
committerPeter Maydell <peter.maydell@linaro.org>2018-11-15 13:06:40 +0000
commitbba390cb9ee31195f4b5d5b061831f5ca37614e2 (patch)
treed9cfc8dc12d05d443382220ed0339d96f4c5de68 /linux-user
parent3fccd3f26ef3c0c76a06c138b17af6d55a5d9904 (diff)
linux-user/sparc/signal.c: Remove dead code
Coverity complains (CID 1390847) about some dead code in do_sigreturn(). This is an if (err) clause that can never be true, copied from the kernel (where __get_user returns an error). The one code path that could report an error is in the currently commented-out pseudocode for handling FPU register restoring, so move the if into that comment (and fix the broken indent in the comment in the process). (The new position for the error check is also the semantically correct one -- we should not restore the signal mask from the signal frame if we get an error here, so the check must be done before set_sigmask(), not after.) Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-id: 20181115114616.26265-1-peter.maydell@linaro.org
Diffstat (limited to 'linux-user')
-rw-r--r--linux-user/sparc/signal.c16
1 files changed, 8 insertions, 8 deletions
diff --git a/linux-user/sparc/signal.c b/linux-user/sparc/signal.c
index 295e415b1e..ead169fbaa 100644
--- a/linux-user/sparc/signal.c
+++ b/linux-user/sparc/signal.c
@@ -282,7 +282,7 @@ long do_sigreturn(CPUSPARCState *env)
uint32_t up_psr, pc, npc;
target_sigset_t set;
sigset_t host_set;
- int err=0, i;
+ int i;
sf_addr = env->regwptr[UREG_FP];
trace_user_do_sigreturn(env, sf_addr);
@@ -320,10 +320,13 @@ long do_sigreturn(CPUSPARCState *env)
}
/* FIXME: implement FPU save/restore:
- * __get_user(fpu_save, &sf->fpu_save);
- * if (fpu_save)
- * err |= restore_fpu_state(env, fpu_save);
- */
+ * __get_user(fpu_save, &sf->fpu_save);
+ * if (fpu_save) {
+ * if (restore_fpu_state(env, fpu_save)) {
+ * goto segv_and_exit;
+ * }
+ * }
+ */
/* This is pretty much atomic, no amount locking would prevent
* the races which exist anyways.
@@ -336,9 +339,6 @@ long do_sigreturn(CPUSPARCState *env)
target_to_host_sigset_internal(&host_set, &set);
set_sigmask(&host_set);
- if (err) {
- goto segv_and_exit;
- }
unlock_user_struct(sf, sf_addr, 0);
return -TARGET_QEMU_ESIGRETURN;