From: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>,
Jeff Dike <[EMAIL PROTECTED]>,
This adds code which enables SIGSEGV reception to the SKAS sig_handler_common,
which matches the tt code.
I still need to figure out why the SA_NODEFER flag was backed out in favor of
this.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
CC: uml-devel <[email protected]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
25-akpm/arch/um/kernel/skas/trap_user.c | 8 ++++++++
1 files changed, 8 insertions(+)
diff -puN arch/um/kernel/skas/trap_user.c~uml-fix-skas-sig-handler-reentrancy
arch/um/kernel/skas/trap_user.c
--- 25/arch/um/kernel/skas/trap_user.c~uml-fix-skas-sig-handler-reentrancy
2005-02-04 17:23:04.000000000 -0800
+++ 25-akpm/arch/um/kernel/skas/trap_user.c 2005-02-04 17:23:04.000000000
-0800
@@ -20,6 +20,14 @@ void sig_handler_common_skas(int sig, vo
int save_errno = errno;
int save_user;
+ /* This is done because to allow SIGSEGV to be delivered inside a SEGV
+ * handler. This can happen in copy_user, and if SEGV is disabled,
+ * the process will die.
+ * XXX Figure out why this is better than SA_NODEFER
+ */
+ if(sig == SIGSEGV)
+ change_sig(SIGSEGV, 1);
+
r = &TASK_REGS(get_current())->skas;
save_user = r->is_user;
r->is_user = 0;
_
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