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linux-user: fix use of SIGRTMIN

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Some RT signals can be in use by glibc,
it's why SIGRTMIN (34) is generally greater than __SIGRTMIN (32).

So SIGRTMIN cannot be mapped to TARGET_SIGRTMIN.

Instead of swapping only SIGRTMIN and SIGRTMAX, map all the
range [TARGET_SIGRTMIN ... TARGET_SIGRTMAX - X] to
      [__SIGRTMIN + X ... SIGRTMAX ]
(SIGRTMIN is __SIGRTMIN + X).

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Taylor Simson <tsimpson@quicinc.com>
Tested-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20200212125658.644558-5-laurent@vivier.eu>
This commit is contained in:
Laurent Vivier
2020-02-12 13:56:58 +01:00
parent 9fcff3a67f
commit 6bc024e713
2 changed files with 48 additions and 5 deletions
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3
linux-user/trace-events
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@@ -1,6 +1,9 @@
# See docs/devel/tracing.txt for syntax documentation.
# signal.c
signal_table_init(int i) "number of unavailable signals: %d"
signal_do_sigaction_guest(int sig, int max) "target signal %d (MAX %d)"
signal_do_sigaction_host(int sig, int max) "host signal %d (MAX %d)"
# */signal.c
user_setup_frame(void *env, uint64_t frame_addr) "env=%p frame_addr=0x%"PRIx64
user_setup_rt_frame(void *env, uint64_t frame_addr) "env=%p frame_addr=0x%"PRIx64