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linux-user: Fix guest signal remapping after adjusting SIGABRT

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The arithmetic within the loop was not adjusted properly after SIGRTMIN
was stolen for the guest SIGABRT.  The effect was that the guest libc
could not send itself __SIGRTMIN to wake sleeping threads.

Fixes: 38ee0a7dfb4b ("linux-user: Remap guest SIGABRT")
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1967
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-10-27 22:03:08 +00:00
parent fd9a38fd43
commit 02d9f5b6ac
1 changed files with 4 additions and 5 deletions
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9
linux-user/signal.c
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@ -536,11 +536,10 @@ static void signal_table_init(void)
host_to_target_signal_table[SIGABRT] = 0;
host_to_target_signal_table[hsig++] = TARGET_SIGABRT;
for (; hsig <= SIGRTMAX; hsig++) {
tsig = hsig - SIGRTMIN + TARGET_SIGRTMIN;
if (tsig <= TARGET_NSIG) {
host_to_target_signal_table[hsig] = tsig;
}
for (tsig = TARGET_SIGRTMIN;
hsig <= SIGRTMAX && tsig <= TARGET_NSIG;
hsig++, tsig++) {
host_to_target_signal_table[hsig] = tsig;
}
/* Invert the mapping that has already been assigned. */