From 097fdf06c63741e6ac1a4e01c2255861dd0a1c49 Mon Sep 17 00:00:00 2001
From: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
Date: Wed, 18 Jan 2006 17:42:51 -0800
Subject: [PATCH] [PATCH] uml: TT mode softint fixes
Some fixes to make softints work in tt mode.
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
arch/um/kernel/time_kern.c | 5 +++--
arch/um/kernel/tt/trap_user.c | 5 +++--
2 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/arch/um/kernel/time_kern.c b/arch/um/kernel/time_kern.c
index 6fa4e1b892b74..3c7626cdba4be 100644
--- a/arch/um/kernel/time_kern.c
+++ b/arch/um/kernel/time_kern.c
@@ -187,8 +187,9 @@ void timer_handler(int sig, union uml_pt_regs *regs)
{
local_irq_disable();
irq_enter();
- update_process_times(CHOOSE_MODE(user_context(UPT_SP(regs)),
- (regs)->skas.is_user));
+ update_process_times(CHOOSE_MODE(
+ (UPT_SC(regs) && user_context(UPT_SP(regs))),
+ (regs)->skas.is_user));
irq_exit();
local_irq_enable();
if(current_thread->cpu == 0)
diff --git a/arch/um/kernel/tt/trap_user.c b/arch/um/kernel/tt/trap_user.c
index a414c529fbcd7..b5d9d64d91e40 100644
--- a/arch/um/kernel/tt/trap_user.c
+++ b/arch/um/kernel/tt/trap_user.c
@@ -18,7 +18,7 @@ void sig_handler_common_tt(int sig, void *sc_ptr)
{
struct sigcontext *sc = sc_ptr;
struct tt_regs save_regs, *r;
- int save_errno = errno, is_user;
+ int save_errno = errno, is_user = 0;
void (*handler)(int, union uml_pt_regs *);
/* This is done because to allow SIGSEGV to be delivered inside a SEGV
@@ -35,7 +35,8 @@ void sig_handler_common_tt(int sig, void *sc_ptr)
GET_FAULTINFO_FROM_SC(r->faultinfo, sc);
}
save_regs = *r;
- is_user = user_context(SC_SP(sc));
+ if (sc)
+ is_user = user_context(SC_SP(sc));
r->sc = sc;
if(sig != SIGUSR2)
r->syscall = -1;
--
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