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accel/tcg/user-exec: silence the compiler warnings 

When using -Wimplicit-fallthrough in our CFLAGS, the compiler showed warning:
../accel/tcg/user-exec.c: In function ‘handle_cpu_signal’:
../accel/tcg/user-exec.c:169:13: warning: this statement may fall through [-Wimplicit-fallthrough=]
  169 |             cpu_exit_tb_from_sighandler(cpu, old_set);
      |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../accel/tcg/user-exec.c:172:9: note: here
  172 |         default:

Mark the cpu_exit_tb_from_sighandler() function with QEMU_NORETURN to fix it.

Reported-by: Euler Robot <euler.robot@huawei.com>
Signed-off-by: Chen Qun <kuhn.chenqun@huawei.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20201211152426.350966-8-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
master
Chen Qun 2020-12-11 16:24:21 +01:00 committed by Thomas Huth
parent d85afd1eb5
commit f190bf05f8
1 changed files with 2 additions and 1 deletions
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3
accel/tcg/user-exec.c
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@ -49,7 +49,8 @@ __thread uintptr_t helper_retaddr;
/* exit the current TB from a signal handler. The host registers are
restored in a state compatible with the CPU emulator
*/
static void cpu_exit_tb_from_sighandler(CPUState *cpu, sigset_t *old_set)
static void QEMU_NORETURN cpu_exit_tb_from_sighandler(CPUState *cpu,
sigset_t *old_set)
{
/* XXX: use siglongjmp ? */
sigprocmask(SIG_SETMASK, old_set, NULL);