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Message-ID: <4BEA3FF3CAA35E408EA55C7BE2E61D0589EBFBC0FD@xmail3.se.axis.com>
Date: Mon, 11 Aug 2014 07:35:44 +0200
From: Mikael Starvik <mikael.starvik@...s.com>
To: Richard Weinberger <richard@...ma-star.at>,
"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
Richard Weinberger <richard@....at>,
Jesper Nilsson <jespern@...s.com>,
linux-cris-kernel <linux-cris-kernel@...s.com>
Subject: RE: [PATCH 06/43] cris: Use get_signal() signal_setup_done()
Acked-by: Mikael Starvik <mikael.starvik@...s.com>
-----Original Message-----
From: Richard Weinberger [mailto:richard@...ma-star.at]
Sent: den 21 juli 2014 16:03
To: akpm@...ux-foundation.org
Cc: linux-kernel@...r.kernel.org; linux-arch@...r.kernel.org; Richard Weinberger; Mikael Starvik; Jesper Nilsson; linux-cris-kernel
Subject: [PATCH 06/43] cris: Use get_signal() signal_setup_done()
From: Richard Weinberger <richard@....at>
Use the more generic functions get_signal() signal_setup_done() for signal delivery.
Signed-off-by: Richard Weinberger <richard@....at>
---
arch/cris/arch-v10/kernel/signal.c | 79 ++++++++++++++++----------------------
arch/cris/arch-v32/kernel/signal.c | 77 +++++++++++++++----------------------
2 files changed, 63 insertions(+), 93 deletions(-)
diff --git a/arch/cris/arch-v10/kernel/signal.c b/arch/cris/arch-v10/kernel/signal.c
index 61ce627..12aac1f 100644
--- a/arch/cris/arch-v10/kernel/signal.c
+++ b/arch/cris/arch-v10/kernel/signal.c
@@ -228,33 +228,33 @@ 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->ka, regs, 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 +265,38 @@ 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->ka, regs, 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 +308,12 @@ 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 +325,18 @@ 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 +346,14 @@ 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 +374,7 @@ 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 +387,12 @@ 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 +409,7 @@ 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 +420,9 @@ 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;
}
diff --git a/arch/cris/arch-v32/kernel/signal.c b/arch/cris/arch-v32/kernel/signal.c
index 01d1375..cc7a39a 100644
--- a/arch/cris/arch-v32/kernel/signal.c
+++ b/arch/cris/arch-v32/kernel/signal.c
@@ -215,23 +215,22 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size)
* trampoline.
*/
static int
-setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
- struct pt_regs * regs)
+setup_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs)
{
int err;
unsigned long return_ip;
struct signal_frame __user *frame;
err = 0;
- frame = get_sigframe(ka, regs, sizeof(*frame));
+ frame = get_sigframe(&ksig->ka, regs, 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], @@ -239,14 +238,14 @@ setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
}
if (err)
- goto give_sigsegv;
+ return -EFAULT;
/*
* Set up to return from user-space. If provided, use a stub
* already located in user-space.
*/
- 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 in the signal return page. */
return_ip = cris_signal_return_page;
@@ -264,7 +263,7 @@ setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
}
if (err)
- goto give_sigsegv;
+ return -EFAULT;
/*
* Set up registers for signal handler.
@@ -273,42 +272,37 @@ setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
* Where the code enter later.
* First argument, signo.
*/
- regs->erp = (unsigned long) ka->sa.sa_handler;
+ regs->erp = (unsigned long) ksig->ka.sa.sa_handler;
regs->srp = return_ip;
- regs->r10 = sig;
+ regs->r10 = ksig->sig;
/* 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)
+setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs
+*regs)
{
int err;
unsigned long return_ip;
struct rt_signal_frame __user *frame;
err = 0;
- frame = get_sigframe(ka, regs, sizeof(*frame));
+ frame = get_sigframe(&ksig->ka, regs, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
- goto give_sigsegv;
+ return -EFAULT;
/* TODO: what is the current->exec_domain stuff and invmap ? */
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)); @@ -317,14 +311,14 @@ 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 user-space. If provided, use a stub
* already located in user-space.
*/
- 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 in the signal return page. */
return_ip = cris_signal_return_page + 6; @@ -345,7 +339,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
}
if (err)
- goto give_sigsegv;
+ return -EFAULT;
/*
* Set up registers for signal handler.
@@ -356,9 +350,9 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
* Second argument is (siginfo_t *).
* Third argument is unused.
*/
- regs->erp = (unsigned long) ka->sa.sa_handler;
+ regs->erp = (unsigned long) ksig->ka.sa.sa_handler;
regs->srp = return_ip;
- regs->r10 = sig;
+ regs->r10 = ksig->sig;
regs->r11 = (unsigned long) &frame->info;
regs->r12 = 0;
@@ -366,17 +360,11 @@ 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;
}
/* Invoke a signal handler to, well, handle the signal. */ static inline void -handle_signal(int canrestart, unsigned long sig,
- siginfo_t *info, struct k_sigaction *ka,
- struct pt_regs * regs)
+handle_signal(int canrestart, struct ksignal *ksig, struct pt_regs
+*regs)
{
sigset_t *oldset = sigmask_to_save();
int ret;
@@ -404,7 +392,7 @@ handle_signal(int canrestart, unsigned long sig,
* 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;
}
@@ -423,13 +411,12 @@ 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);
}
/*
@@ -446,9 +433,7 @@ handle_signal(int canrestart, unsigned long sig, void do_signal(int canrestart, struct pt_regs *regs) {
- int signr;
- siginfo_t info;
- struct k_sigaction ka;
+ struct ksignal ksig;
/*
* The common case should go fast, which is why this point is @@ -458,11 +443,9 @@ 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;
}
--
1.8.4.5
--
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