a3616a3c02
In the fpsp040 code when copyin or copyout fails call
force_sigsegv(SIGSEGV) instead of do_exit(SIGSEGV).
This solves a couple of problems. Because do_exit embeds the ptrace
stop PTRACE_EVENT_EXIT a complete stack frame needs to be present for
that to work correctly. There is always the information needed for a
ptrace stop where get_signal is called. So exiting with a signal
solves the ptrace issue.
Further exiting with a signal ensures that all of the threads in a
process are killed not just the thread that malfunctioned. Which
avoids confusing userspace.
To make force_sigsegv(SIGSEGV) work in fpsp040_die modify the code to
save all of the registers and jump to ret_from_exception (which
ultimately calls get_signal) after fpsp040_die returns.
v2: Updated the branches to use gas's pseudo ops that automatically
calculate the best branch instruction to use for the purpose.
v1: https://lkml.kernel.org/r/87a6m8kgtx.fsf_-_@disp2133
Link: https://lkml.kernel.org/r/87tukghjfs.fsf_-_@disp2133
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
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|---|---|---|
| .. | ||
| bindec.S | ||
| binstr.S | ||
| bugfix.S | ||
| decbin.S | ||
| do_func.S | ||
| fpsp.h | ||
| gen_except.S | ||
| get_op.S | ||
| kernel_ex.S | ||
| Makefile | ||
| README | ||
| res_func.S | ||
| round.S | ||
| sacos.S | ||
| sasin.S | ||
| satan.S | ||
| satanh.S | ||
| scale.S | ||
| scosh.S | ||
| setox.S | ||
| sgetem.S | ||
| sint.S | ||
| skeleton.S | ||
| slog2.S | ||
| slogn.S | ||
| smovecr.S | ||
| srem_mod.S | ||
| ssin.S | ||
| ssinh.S | ||
| stan.S | ||
| stanh.S | ||
| sto_res.S | ||
| stwotox.S | ||
| tbldo.S | ||
| util.S | ||
| x_bsun.S | ||
| x_fline.S | ||
| x_operr.S | ||
| x_ovfl.S | ||
| x_snan.S | ||
| x_store.S | ||
| x_unfl.S | ||
| x_unimp.S | ||
| x_unsupp.S | ||
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