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| author | Paul Mackerras <paulus@samba.org> | 2005-09-10 21:13:11 +1000 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-10 10:15:11 -0700 |
| commit | bb0bb3b6596cdb08adb0b72453cc67d48e139c2c (patch) | |
| tree | f9116ed650d499d405a3fe021c473f9558897d96 /include/asm-ppc | |
| parent | 1e63bc7342c40f0f1dd83d80d368665bd06f4963 (diff) | |
| download | linux-bb0bb3b6596cdb08adb0b72453cc67d48e139c2c.tar.gz linux-bb0bb3b6596cdb08adb0b72453cc67d48e139c2c.tar.bz2 linux-bb0bb3b6596cdb08adb0b72453cc67d48e139c2c.zip | |
[PATCH] ppc32: Kill init on unhandled synchronous signals
This is a patch that I have had in my tree for ages. If init causes
an exception that raises a signal, such as a SIGSEGV, SIGILL or
SIGFPE, and it hasn't registered a handler for it, we don't deliver
the signal, since init doesn't get any signals that it doesn't have a
handler for. But that means that we just return to userland and
generate the same exception again immediately. With this patch we
print a message and kill init in this situation.
This is very useful when you have a bug in the kernel that means that
init doesn't get as far as executing its first instruction. :)
Without this patch the system hangs when it gets to starting the
userland init; with it you at least get a message giving you a clue
about what has gone wrong.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-ppc')
| -rw-r--r-- | include/asm-ppc/system.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-ppc/system.h b/include/asm-ppc/system.h index 513a334c5810..d754ab570fe0 100644 --- a/include/asm-ppc/system.h +++ b/include/asm-ppc/system.h @@ -88,6 +88,7 @@ extern void *cacheable_memcpy(void *, const void *, unsigned int); extern int do_page_fault(struct pt_regs *, unsigned long, unsigned long); extern void bad_page_fault(struct pt_regs *, unsigned long, int); extern void die(const char *, struct pt_regs *, long); +extern void _exception(int, struct pt_regs *, int, unsigned long); #ifdef CONFIG_BOOKE_WDT extern u32 booke_wdt_enabled; extern u32 booke_wdt_period; |