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| author |   David Miller <davem@redhat.com> | 2018-10-25 20:36:46 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-10-26 15:04:41 -0700 |
| commit | 5b4fc3882a649c9411dd0dcad2ddb78e911d340e (patch) | |
| tree | 1e4d71d14473c440a48f1fbfdcd465cf478fc2f4 /arch/sparc/include/asm | |
| parent | sparc: Fix VDSO build with older binutils. (diff) | |
| download | linux-dev-5b4fc3882a649c9411dd0dcad2ddb78e911d340e.tar.xz linux-dev-5b4fc3882a649c9411dd0dcad2ddb78e911d340e.zip | |
sparc64: Make corrupted user stacks more debuggable.
Right now if we get a corrupted user stack frame we do a
do_exit(SIGILL) which is not helpful.
If under a debugger, this behavior causes the inferior process to
exit. So the register and other state cannot be examined at the time
of the event.
Instead, conditionally log a rate limited kernel log message and then
force a SIGSEGV.
With bits and ideas borrowed (as usual) from powerpc.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/include/asm')
| -rw-r--r-- | arch/sparc/include/asm/switch_to_64.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/sparc/include/asm/switch_to_64.h b/arch/sparc/include/asm/switch_to_64.h index 4ff29b1406a9..b1d4e2e3210f 100644 --- a/arch/sparc/include/asm/switch_to_64.h +++ b/arch/sparc/include/asm/switch_to_64.h @@ -67,6 +67,7 @@ do { save_and_clear_fpu(); \ } while(0) void synchronize_user_stack(void); -void fault_in_user_windows(void); +struct pt_regs; +void fault_in_user_windows(struct pt_regs *); #endif /* __SPARC64_SWITCH_TO_64_H */ |