[PATCH 37/43] m68k: Use sigsp()

[Richard Weinberger]

From: Richard Weinberger <***@nod.at>

Use sigsp() instead of the open coded variant.

Signed-off-by: Richard Weinberger <***@nod.at>
---
arch/m68k/kernel/signal.c | 16 ++++------------
1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/arch/m68k/kernel/signal.c b/arch/m68k/kernel/signal.c
index c8e6fa8..967a8b7 100644
--- a/arch/m68k/kernel/signal.c
+++ b/arch/m68k/kernel/signal.c
@@ -835,18 +835,10 @@ static inline int rt_setup_ucontext(struct ucontext __user *uc, struct pt_regs *
}

static inline void __user *
-get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
+get_sigframe(struct ksignal *ksig, size_t frame_size)
{
- unsigned long usp;
-
- /* Default to using normal stack. */
- usp = rdusp();
+ unsigned long usp = sigsp(rdusp(), ksig);

- /* This is the X/Open sanctioned signal stack switching. */
- if (ka->sa.sa_flags & SA_ONSTACK) {
- if (!sas_ss_flags(usp))
- usp = current->sas_ss_sp + current->sas_ss_size;
- }
return (void __user *)((usp - frame_size) & -8UL);
}

@@ -866,7 +858,7 @@ static int setup_frame(struct ksignal *ksig, sigset_t *set,
return -EFAULT;
}

- frame = get_sigframe(&ksig->ka, regs, sizeof(*frame) + fsize);
+ frame = get_sigframe(ksig, sizeof(*frame) + fsize);

if (fsize)
err |= copy_to_user (frame + 1, regs + 1, fsize);
@@ -951,7 +943,7 @@ static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
return -EFAULT;
}

- frame = get_sigframe(&ksig->ka, regs, sizeof(*frame));
+ frame = get_sigframe(ksig, sizeof(*frame));

if (fsize)
err |= copy_to_user (&frame->uc.uc_extra, regs + 1, fsize);

[Richard Weinberger]

From: Richard Weinberger <***@nod.at>

Use the more generic functions get_signal() signal_setup_done()
for signal delivery.

Signed-off-by: Richard Weinberger <***@nod.at>
---
arch/m68k/kernel/signal.c | 63 ++++++++++++++++++-----------------------------
1 file changed, 24 insertions(+), 39 deletions(-)

diff --git a/arch/m68k/kernel/signal.c b/arch/m68k/kernel/signal.c
index 57fd286..c8e6fa8 100644
--- a/arch/m68k/kernel/signal.c
+++ b/arch/m68k/kernel/signal.c
@@ -850,23 +850,23 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
return (void __user *)((usp - frame_size) & -8UL);
}

-static int setup_frame (int sig, struct k_sigaction *ka,
- sigset_t *set, struct pt_regs *regs)
+static int setup_frame(struct ksignal *ksig, sigset_t *set,
+ struct pt_regs *regs)
{
struct sigframe __user *frame;
int fsize = frame_extra_sizes(regs->format);
struct sigcontext context;
- int err = 0;
+ int err = 0, sig = ksig->sig;

if (fsize < 0) {
#ifdef DEBUG
printk ("setup_frame: Unknown frame format %#x\n",
regs->format);
#endif
- goto give_sigsegv;
+ return -EFAULT;
}

- frame = get_sigframe(ka, regs, sizeof(*frame) + fsize);
+ frame = get_sigframe(&ksig->ka, regs, sizeof(*frame) + fsize);

if (fsize)
err |= copy_to_user (frame + 1, regs + 1, fsize);
@@ -899,7 +899,7 @@ static int setup_frame (int sig, struct k_sigaction *ka,
#endif

if (err)
- goto give_sigsegv;
+ return -EFAULT;

push_cache ((unsigned long) &frame->retcode);

@@ -908,7 +908,7 @@ static int setup_frame (int sig, struct k_sigaction *ka,
* to destroy is successfully copied to sigframe.
*/
wrusp ((unsigned long) frame);
- regs->pc = (unsigned long) ka->sa.sa_handler;
+ regs->pc = (unsigned long) ksig->ka.sa.sa_handler;
adjustformat(regs);

/*
@@ -934,28 +934,24 @@ static int setup_frame (int sig, struct k_sigaction *ka,
tregs->sr = regs->sr;
}
return 0;
-
-give_sigsegv:
- force_sigsegv(sig, current);
- return err;
}

-static int setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
- sigset_t *set, struct pt_regs *regs)
+static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
+ struct pt_regs *regs)
{
struct rt_sigframe __user *frame;
int fsize = frame_extra_sizes(regs->format);
- int err = 0;
+ int err = 0, sig = ksig->sig;

if (fsize < 0) {
#ifdef DEBUG
printk ("setup_frame: Unknown frame format %#x\n",
regs->format);
#endif
- goto give_sigsegv;
+ return -EFAULT;
}

- frame = get_sigframe(ka, regs, sizeof(*frame));
+ frame = get_sigframe(&ksig->ka, regs, sizeof(*frame));

if (fsize)
err |= copy_to_user (&frame->uc.uc_extra, regs + 1, fsize);
@@ -968,7 +964,7 @@ static int setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
&frame->sig);
err |= __put_user(&frame->info, &frame->pinfo);
err |= __put_user(&frame->uc, &frame->puc);
- err |= copy_siginfo_to_user(&frame->info, info);
+ err |= copy_siginfo_to_user(&frame->info, &ksig->info);

/* Create the ucontext. */
err |= __put_user(0, &frame->uc.uc_flags);
@@ -996,7 +992,7 @@ static int setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
#endif /* CONFIG_MMU */

if (err)
- goto give_sigsegv;
+ return -EFAULT;

push_cache ((unsigned long) &frame->retcode);

@@ -1005,7 +1001,7 @@ static int setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
* to destroy is successfully copied to sigframe.
*/
wrusp ((unsigned long) frame);
- regs->pc = (unsigned long) ka->sa.sa_handler;
+ regs->pc = (unsigned long) ksig->ka.sa.sa_handler;
adjustformat(regs);

/*
@@ -1031,10 +1027,6 @@ static int setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
tregs->sr = regs->sr;
}
return 0;
-
-give_sigsegv:
- force_sigsegv(sig, current);
- return err;
}

static inline void
@@ -1074,26 +1066,22 @@ handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler)
* OK, we're invoking a handler
*/
static void
-handle_signal(int sig, struct k_sigaction *ka, siginfo_t *info,
- struct pt_regs *regs)
+handle_signal(struct ksignal *ksig, struct pt_regs *regs)
{
sigset_t *oldset = sigmask_to_save();
int err;
/* are we from a system call? */
if (regs->orig_d0 >= 0)
/* If so, check system call restarting.. */
- handle_restart(regs, ka, 1);
+ handle_restart(regs, &ksig->ka, 1);

/* set up the stack frame */
- if (ka->sa.sa_flags & SA_SIGINFO)
- err = setup_rt_frame(sig, ka, info, oldset, regs);
+ if (ksig->ka.sa.sa_flags & SA_SIGINFO)
+ err = setup_rt_frame(ksig, oldset, regs);
else
- err = setup_frame(sig, ka, oldset, regs);
-
- if (err)
- return;
+ err = setup_frame(ksig, oldset, regs);

- signal_delivered(sig, info, ka, regs, 0);
+ signal_setup_done(err, ksig, 0);

if (test_thread_flag(TIF_DELAYED_TRACE)) {
regs->sr &= ~0x8000;
@@ -1108,16 +1096,13 @@ handle_signal(int sig, struct k_sigaction *ka, siginfo_t *info,
*/
static void do_signal(struct pt_regs *regs)
{
- siginfo_t info;
- struct k_sigaction ka;
- int signr;
+ struct ksignal ksig;

current->thread.esp0 = (unsigned long) regs;

- signr = get_signal_to_deliver(&info, &ka, regs, NULL);
- if (signr > 0) {
+ if (get_signal(&ksig)) {
/* Whee! Actually deliver the signal. */
- handle_signal(signr, &ka, &info, regs);
+ handle_signal(&ksig, regs);
return;
}