diff options
author | Paul Mackerras <paulus@samba.org> | 2005-09-10 07:13:11 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-10 13:15:11 -0400 |
commit | bb0bb3b6596cdb08adb0b72453cc67d48e139c2c (patch) | |
tree | f9116ed650d499d405a3fe021c473f9558897d96 /include/asm-ppc | |
parent | 1e63bc7342c40f0f1dd83d80d368665bd06f4963 (diff) |
[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); | |||
88 | extern int do_page_fault(struct pt_regs *, unsigned long, unsigned long); | 88 | extern int do_page_fault(struct pt_regs *, unsigned long, unsigned long); |
89 | extern void bad_page_fault(struct pt_regs *, unsigned long, int); | 89 | extern void bad_page_fault(struct pt_regs *, unsigned long, int); |
90 | extern void die(const char *, struct pt_regs *, long); | 90 | extern void die(const char *, struct pt_regs *, long); |
91 | extern void _exception(int, struct pt_regs *, int, unsigned long); | ||
91 | #ifdef CONFIG_BOOKE_WDT | 92 | #ifdef CONFIG_BOOKE_WDT |
92 | extern u32 booke_wdt_enabled; | 93 | extern u32 booke_wdt_enabled; |
93 | extern u32 booke_wdt_period; | 94 | extern u32 booke_wdt_period; |