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linux-user: Split out helpers for sigsuspend

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Two new functions: process_sigsuspend_mask and finish_sigsuspend_mask.
Move the size check and copy-from-user code.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20220315084308.433109-3-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Richard Henderson 2022-03-15 01:43:05 -07:00 • committed by Laurent Vivier
parent 7fb5ef350b
commit 0a99f09383
3 changed files with 66 additions and 23 deletions
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23
linux-user/signal.c
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@ -1199,3 +1199,26 @@ void process_pending_signals(CPUArchState *cpu_env)
}
ts->in_sigsuspend = 0;
}
int process_sigsuspend_mask(sigset_t **pset, target_ulong sigset,
target_ulong sigsize)
{
TaskState *ts = (TaskState *)thread_cpu->opaque;
sigset_t *host_set = &ts->sigsuspend_mask;
target_sigset_t *target_sigset;
if (sigsize != sizeof(*target_sigset)) {
/* Like the kernel, we enforce correct size sigsets */
return -TARGET_EINVAL;
}
target_sigset = lock_user(VERIFY_READ, sigset, sigsize, 1);
if (!target_sigset) {
return -TARGET_EFAULT;
}
target_to_host_sigset(host_set, target_sigset);
unlock_user(target_sigset, sigset, 0);
*pset = host_set;
return 0;
}