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Date: Tue, 8 Oct 2013 13:33:13 +0200
From: Richard Weinberger <richard@....at>
To: linux-kernel@...r.kernel.org
Cc: linux-arch@...r.kernel.org, viro@...iv.linux.org.uk,
vgupta@...opsys.com, catalin.marinas@....com, will.deacon@....com,
hskinnemoen@...il.com, egtvedt@...fundet.no, vapier@...too.org,
msalter@...hat.com, a-jacquiot@...com, starvik@...s.com,
jesper.nilsson@...s.com, dhowells@...hat.com, rkuo@...eaurora.org,
tony.luck@...el.com, fenghua.yu@...el.com, takata@...ux-m32r.org,
geert@...ux-m68k.org, james.hogan@...tec.com, monstr@...str.eu,
yasutake.koichi@...panasonic.com, ralf@...ux-mips.org,
jonas@...thpole.se, jejb@...isc-linux.org, deller@....de,
benh@...nel.crashing.org, paulus@...ba.org, schwidefsky@...ibm.com,
heiko.carstens@...ibm.com, liqin.linux@...il.com,
lennox.wu@...il.com, lethal@...ux-sh.org, cmetcalf@...era.com,
gxt@...c.pku.edu.cn, linux-xtensa@...ux-xtensa.org,
akpm@...ux-foundation.org, oleg@...hat.com, tj@...nel.org,
Richard Weinberger <richard@....at>
Subject: [PATCH 13/29] metag: Use get_signal() signal_setup_done()
Use the more generic functions get_signal() signal_setup_done()
for signal delivery.
Signed-off-by: Richard Weinberger <richard@....at>
---
arch/metag/kernel/signal.c | 55 ++++++++++++++++++++--------------------------
1 file changed, 24 insertions(+), 31 deletions(-)
diff --git a/arch/metag/kernel/signal.c b/arch/metag/kernel/signal.c
index 3be61cf..9fa27c2 100644
--- a/arch/metag/kernel/signal.c
+++ b/arch/metag/kernel/signal.c
@@ -152,18 +152,18 @@ static void __user *get_sigframe(struct k_sigaction *ka, unsigned long sp,
return (void __user *)sp;
}
-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 err = -EFAULT;
+ int err;
unsigned long code;
- frame = get_sigframe(ka, regs->REG_SP, sizeof(*frame));
+ frame = get_sigframe(&ksig->ka, regs->REG_SP, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
- goto out;
+ return -EFAULT;
- 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);
@@ -174,7 +174,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
if (err)
- goto out;
+ return -EFAULT;
/* Set up to return from userspace. */
@@ -187,15 +187,15 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
err |= __put_user(code, (unsigned long __user *)(&frame->retcode[1]));
if (err)
- goto out;
+ return -EFAULT;
/* Set up registers for signal handler */
regs->REG_RTP = (unsigned long) frame->retcode;
regs->REG_SP = (unsigned long) frame + sizeof(*frame);
- regs->REG_ARG1 = sig;
+ regs->REG_ARG1 = ksig->sig;
regs->REG_ARG2 = (unsigned long) &frame->info;
regs->REG_ARG3 = (unsigned long) &frame->uc;
- regs->REG_PC = (unsigned long) ka->sa.sa_handler;
+ regs->REG_PC = (unsigned long) ksig->ka.sa.sa_handler;
pr_debug("SIG deliver (%s:%d): sp=%p pc=%08x pr=%08x\n",
current->comm, current->pid, frame, regs->REG_PC,
@@ -205,24 +205,19 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
* effective cache flush - directed rather than 'full flush'.
*/
flush_cache_sigtramp(regs->REG_RTP, sizeof(frame->retcode));
-out:
- if (err) {
- force_sigsegv(sig, current);
- return -EFAULT;
- }
+
return 0;
}
-static void handle_signal(unsigned long sig, siginfo_t *info,
- struct k_sigaction *ka, struct pt_regs *regs)
+static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
{
sigset_t *oldset = sigmask_to_save();
+ int ret;
/* Set up the stack frame */
- if (setup_rt_frame(sig, ka, info, oldset, regs))
- return;
+ ret = setup_rt_frame(ksig, oldset, regs);
- signal_delivered(sig, info, ka, regs, test_thread_flag(TIF_SINGLESTEP));
+ signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP));
}
/*
@@ -235,10 +230,8 @@ static void handle_signal(unsigned long sig, siginfo_t *info,
static int do_signal(struct pt_regs *regs, int syscall)
{
unsigned int retval = 0, continue_addr = 0, restart_addr = 0;
- struct k_sigaction ka;
- siginfo_t info;
- int signr;
int restart = 0;
+ struct ksignal ksig;
/*
* By the end of rt_sigreturn the context describes the point that the
@@ -272,30 +265,30 @@ static int do_signal(struct pt_regs *regs, int syscall)
}
/*
- * Get the signal to deliver. When running under ptrace, at this point
- * the debugger may change all our registers ...
- */
- signr = get_signal_to_deliver(&info, &ka, regs, NULL);
- /*
* Depending on the signal settings we may need to revert the decision
* to restart the system call. But skip this if a debugger has chosen to
* restart at a different PC.
*/
if (regs->REG_PC != restart_addr)
restart = 0;
- if (signr > 0) {
+
+ /*
+ * Get the signal to deliver. When running under ptrace, at this point
+ * the debugger may change all our registers ...
+ */
+ if (get_signal(&ksig)) {
if (unlikely(restart)) {
if (retval == -ERESTARTNOHAND
|| retval == -ERESTART_RESTARTBLOCK
|| (retval == -ERESTARTSYS
- && !(ka.sa.sa_flags & SA_RESTART))) {
+ && !(ksig.ka.sa.sa_flags & SA_RESTART))) {
regs->REG_RETVAL = -EINTR;
regs->REG_PC = continue_addr;
}
}
/* Whee! Actually deliver the signal. */
- handle_signal(signr, &info, &ka, regs);
+ handle_signal(&ksig, regs);
return 0;
}
--
1.8.1.4
--
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