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-rw-r--r--arch/cris/arch-v10/kernel/signal.c89
1 files changed, 35 insertions, 54 deletions
diff --git a/arch/cris/arch-v10/kernel/signal.c b/arch/cris/arch-v10/kernel/signal.c
index 61ce6273a895..9b32d338838b 100644
--- a/arch/cris/arch-v10/kernel/signal.c
+++ b/arch/cris/arch-v10/kernel/signal.c
@@ -203,15 +203,9 @@ static int setup_sigcontext(struct sigcontext __user *sc,
* - usually on the stack. */
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 sp = rdusp();
-
- /* This is the X/Open sanctioned signal stack switching. */
- if (ka->sa.sa_flags & SA_ONSTACK) {
- if (! on_sig_stack(sp))
- sp = current->sas_ss_sp + current->sas_ss_size;
- }
+ unsigned long sp = sigsp(rdusp(), ksig);
/* make sure the frame is dword-aligned */
@@ -228,33 +222,33 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
* user-mode trampoline.
*/
-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;
unsigned long return_ip;
int err = 0;
- frame = get_sigframe(ka, regs, sizeof(*frame));
+ frame = get_sigframe(ksig, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
- goto give_sigsegv;
+ return -EFAULT;
err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);
if (err)
- goto give_sigsegv;
+ return -EFAULT;
if (_NSIG_WORDS > 1) {
err |= __copy_to_user(frame->extramask, &set->sig[1],
sizeof(frame->extramask));
}
if (err)
- goto give_sigsegv;
+ return -EFAULT;
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
- if (ka->sa.sa_flags & SA_RESTORER) {
- return_ip = (unsigned long)ka->sa.sa_restorer;
+ if (ksig->ka.sa.sa_flags & SA_RESTORER) {
+ return_ip = (unsigned long)ksig->ka.sa.sa_restorer;
} else {
/* trampoline - the desired return ip is the retcode itself */
return_ip = (unsigned long)&frame->retcode;
@@ -265,42 +259,38 @@ static int setup_frame(int sig, struct k_sigaction *ka,
}
if (err)
- goto give_sigsegv;
+ return -EFAULT;
/* Set up registers for signal handler */
- regs->irp = (unsigned long) ka->sa.sa_handler; /* what we enter NOW */
+ regs->irp = (unsigned long) ksig->ka.sa.sa_handler; /* what we enter NOW */
regs->srp = return_ip; /* what we enter LATER */
- regs->r10 = sig; /* first argument is signo */
+ regs->r10 = ksig->sig; /* first argument is signo */
/* actually move the usp to reflect the stacked frame */
wrusp((unsigned long)frame);
return 0;
-
-give_sigsegv:
- force_sigsegv(sig, current);
- return -EFAULT;
}
-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;
unsigned long return_ip;
int err = 0;
- frame = get_sigframe(ka, regs, sizeof(*frame));
+ frame = get_sigframe(ksig, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
- goto give_sigsegv;
+ return -EFAULT;
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);
if (err)
- goto give_sigsegv;
+ return -EFAULT;
/* Clear all the bits of the ucontext we don't use. */
err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));
@@ -312,12 +302,12 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
err |= __save_altstack(&frame->uc.uc_stack, rdusp());
if (err)
- goto give_sigsegv;
+ return -EFAULT;
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
- if (ka->sa.sa_flags & SA_RESTORER) {
- return_ip = (unsigned long)ka->sa.sa_restorer;
+ if (ksig->ka.sa.sa_flags & SA_RESTORER) {
+ return_ip = (unsigned long)ksig->ka.sa.sa_restorer;
} else {
/* trampoline - the desired return ip is the retcode itself */
return_ip = (unsigned long)&frame->retcode;
@@ -329,18 +319,18 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
}
if (err)
- goto give_sigsegv;
+ return -EFAULT;
/* TODO what is the current->exec_domain stuff and invmap ? */
/* Set up registers for signal handler */
/* What we enter NOW */
- regs->irp = (unsigned long) ka->sa.sa_handler;
+ regs->irp = (unsigned long) ksig->ka.sa.sa_handler;
/* What we enter LATER */
regs->srp = return_ip;
/* First argument is signo */
- regs->r10 = sig;
+ regs->r10 = ksig->sig;
/* Second argument is (siginfo_t *) */
regs->r11 = (unsigned long)&frame->info;
/* Third argument is unused */
@@ -350,19 +340,14 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
wrusp((unsigned long)frame);
return 0;
-
-give_sigsegv:
- force_sigsegv(sig, current);
- return -EFAULT;
}
/*
* OK, we're invoking a handler
*/
-static inline void handle_signal(int canrestart, unsigned long sig,
- siginfo_t *info, struct k_sigaction *ka,
- struct pt_regs *regs)
+static inline void handle_signal(int canrestart, struct ksignal *ksig,
+ struct pt_regs *regs)
{
sigset_t *oldset = sigmask_to_save();
int ret;
@@ -383,7 +368,7 @@ static inline void handle_signal(int canrestart, unsigned long sig,
/* ERESTARTSYS means to restart the syscall if
* there is no handler or the handler was
* registered with SA_RESTART */
- if (!(ka->sa.sa_flags & SA_RESTART)) {
+ if (!(ksig->ka.sa.sa_flags & SA_RESTART)) {
regs->r10 = -EINTR;
break;
}
@@ -396,13 +381,12 @@ static inline void handle_signal(int canrestart, unsigned long sig,
}
/* Set up the stack frame */
- if (ka->sa.sa_flags & SA_SIGINFO)
- ret = setup_rt_frame(sig, ka, info, oldset, regs);
+ if (ksig->ka.sa.sa_flags & SA_SIGINFO)
+ ret = setup_rt_frame(ksig, oldset, regs);
else
- ret = setup_frame(sig, ka, oldset, regs);
+ ret = setup_frame(ksig, oldset, regs);
- if (ret == 0)
- signal_delivered(sig, info, ka, regs, 0);
+ signal_setup_done(ret, ksig, 0);
}
/*
@@ -419,9 +403,7 @@ static inline void handle_signal(int canrestart, unsigned long sig,
void do_signal(int canrestart, struct pt_regs *regs)
{
- siginfo_t info;
- int signr;
- struct k_sigaction ka;
+ struct ksignal ksig;
/*
* We want the common case to go fast, which
@@ -432,10 +414,9 @@ void do_signal(int canrestart, struct pt_regs *regs)
if (!user_mode(regs))
return;
- signr = get_signal_to_deliver(&info, &ka, regs, NULL);
- if (signr > 0) {
+ if (get_signal(&ksig)) {
/* Whee! Actually deliver the signal. */
- handle_signal(canrestart, signr, &info, &ka, regs);
+ handle_signal(canrestart, &ksig, regs);
return;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.