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linux-user: Move TARGET_SA_RESTORER out of generic/signal.h

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SA_RESTORER and the associated sa_restorer field of struct sigaction are
an obsolete feature, not expected to be used by future architectures.
They are also absent on RISC-V, LoongArch, Hexagon and OpenRISC, but
defined due to their use of generic/signal.h.  This leads to corrupted
data and out-of-bounds accesses.

Move the definition of TARGET_SA_RESTORER out of generic/signal.h into the
target_signal.h files that need it.  Note that m68k has the sa_restorer
field, but does not use it and does not define SA_RESTORER.

Reported-by: Thomas Weißschuh <thomas@t-8ch.de>
Signed-off-by: Andreas Schwab <schwab@suse.de>
Reviewed-by: Thomas Weißschuh <thomas@t-8ch.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <mvmed060xc9.fsf@suse.de>
This commit is contained in:
Andreas Schwab 2025-02-10 13:59:34 +01:00 • committed by Richard Henderson
parent 4b7b20a3b7
commit 513823e752
11 changed files with 19 additions and 1 deletions
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1
linux-user/generic/signal.h
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@ -15,7 +15,6 @@
#define TARGET_SA_RESTART 0x10000000
#define TARGET_SA_NODEFER 0x40000000
#define TARGET_SA_RESETHAND 0x80000000
#define TARGET_SA_RESTORER 0x04000000
#define TARGET_SIGHUP 1
#define TARGET_SIGINT 2