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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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| .. | ||
| syscalls | ||
| .gitignore | ||
| asm-offsets.c | ||
| bootinfo_proc.c | ||
| dma.c | ||
| early_printk.c | ||
| entry.S | ||
| head.S | ||
| ints.c | ||
| irq.c | ||
| machine_kexec.c | ||
| Makefile | ||
| module.c | ||
| pcibios.c | ||
| process.c | ||
| ptrace.c | ||
| relocate_kernel.S | ||
| setup_mm.c | ||
| setup_no.c | ||
| setup.c | ||
| signal.c | ||
| sun3-head.S | ||
| sys_m68k.c | ||
| syscalltable.S | ||
| time.c | ||
| traps.c | ||
| uboot.c | ||
| vectors.c | ||
| vmlinux-nommu.lds | ||
| vmlinux-std.lds | ||
| vmlinux-sun3.lds | ||
| vmlinux.lds.S | ||