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linux-user: Remove dead error-checking code

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Remove some dead code spotted by Coverity (CID 1009855,
1390854, 1390847). The underlying cause in all these cases
is the same: QEMU's put_user operations can't result in
errors, but the kernel's equivalent does. So when code
was copied from the kernel signal-frame-setup/teardown
code, checks on error flags that were needed in the kernel
became dead code for us.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20181019161715.12122-1-peter.maydell@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Peter Maydell 2018-10-19 17:17:15 +01:00 committed by Laurent Vivier
parent b4c0595446
commit e285977e77
3 changed files with 0 additions and 9 deletions
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3
linux-user/m68k/signal.c
View File

@ -334,9 +334,6 @@ void setup_rt_frame(int sig, struct target_sigaction *ka,
(uint32_t *)(frame->retcode + 0));
__put_user(0x4e40, (uint16_t *)(frame->retcode + 4));
if (err)
goto give_sigsegv;
/* Set up to return from userspace */
env->aregs[7] = frame_addr;

4
linux-user/sh4/signal.c
View File

@ -279,7 +279,6 @@ long do_sigreturn(CPUSH4State *regs)
sigset_t blocked;
target_sigset_t target_set;
int i;
int err = 0;
frame_addr = regs->gregs[15];
trace_user_do_sigreturn(regs, frame_addr);
@ -292,9 +291,6 @@ long do_sigreturn(CPUSH4State *regs)
__get_user(target_set.sig[i], &frame->extramask[i - 1]);
}
if (err)
goto badframe;
target_to_host_sigset_internal(&blocked, &target_set);
set_sigmask(&blocked);

2
linux-user/sparc/signal.c
View File

@ -256,8 +256,6 @@ void setup_frame(int sig, struct target_sigaction *ka,
/* t 0x10 */
val32 = 0x91d02010;
__put_user(val32, &sf->insns[1]);
if (err)
goto sigsegv;
}
unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
return;