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linux-user: Fix guest signal remapping after adjusting SIGABRT 

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: 38ee0a7dfb ("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
linux-user
signal.c

9
linux-user/signal.c
View File

@ -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. */