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Message-Id: <1405951409-16953-22-git-send-email-richard@sigma-star.at>
Date: Mon, 21 Jul 2014 16:03:07 +0200
From: Richard Weinberger <richard@...ma-star.at>
To: akpm@...ux-foundation.org
Cc: linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
Richard Weinberger <richard@....at>, jdike@...toit.com,
tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
x86@...nel.org, user-mode-linux-devel@...ts.sourceforge.net,
user-mode-linux-user@...ts.sourceforge.net
Subject: [PATCH 21/43] um: 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/um/include/shared/frame_kern.h | 12 ++++------
arch/um/kernel/signal.c | 27 +++++++++-------------
arch/x86/um/signal.c | 45 +++++++++++++++++--------------------
3 files changed, 36 insertions(+), 48 deletions(-)
diff --git a/arch/um/include/shared/frame_kern.h b/arch/um/include/shared/frame_kern.h
index f2ca570..a5cde5c 100644
--- a/arch/um/include/shared/frame_kern.h
+++ b/arch/um/include/shared/frame_kern.h
@@ -6,14 +6,10 @@
#ifndef __FRAME_KERN_H_
#define __FRAME_KERN_H_
-extern int setup_signal_stack_sc(unsigned long stack_top, int sig,
- struct k_sigaction *ka,
- struct pt_regs *regs,
- sigset_t *mask);
-extern int setup_signal_stack_si(unsigned long stack_top, int sig,
- struct k_sigaction *ka,
- struct pt_regs *regs, struct siginfo *info,
- sigset_t *mask);
+extern int setup_signal_stack_sc(unsigned long stack_top, struct ksignal *ksig,
+ struct pt_regs *regs, sigset_t *mask);
+extern int setup_signal_stack_si(unsigned long stack_top, struct ksignal *ksig,
+ struct pt_regs *regs, sigset_t *mask);
#endif
diff --git a/arch/um/kernel/signal.c b/arch/um/kernel/signal.c
index f57e02e..4f60e4a 100644
--- a/arch/um/kernel/signal.c
+++ b/arch/um/kernel/signal.c
@@ -18,8 +18,7 @@ EXPORT_SYMBOL(unblock_signals);
/*
* OK, we're invoking a handler
*/
-static void handle_signal(struct pt_regs *regs, unsigned long signr,
- struct k_sigaction *ka, struct siginfo *info)
+static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
{
sigset_t *oldset = sigmask_to_save();
int singlestep = 0;
@@ -39,7 +38,7 @@ static void handle_signal(struct pt_regs *regs, unsigned long signr,
break;
case -ERESTARTSYS:
- if (!(ka->sa.sa_flags & SA_RESTART)) {
+ if (!(ksig->ka.sa.sa_flags & SA_RESTART)) {
PT_REGS_SYSCALL_RET(regs) = -EINTR;
break;
}
@@ -52,32 +51,28 @@ static void handle_signal(struct pt_regs *regs, unsigned long signr,
}
sp = PT_REGS_SP(regs);
- if ((ka->sa.sa_flags & SA_ONSTACK) && (sas_ss_flags(sp) == 0))
+ if ((ksig->ka.sa.sa_flags & SA_ONSTACK) && (sas_ss_flags(sp) == 0))
sp = current->sas_ss_sp + current->sas_ss_size;
#ifdef CONFIG_ARCH_HAS_SC_SIGNALS
- if (!(ka->sa.sa_flags & SA_SIGINFO))
- err = setup_signal_stack_sc(sp, signr, ka, regs, oldset);
+ if (!(ksig->ka.sa.sa_flags & SA_SIGINFO))
+ err = setup_signal_stack_sc(sp, ksig, regs, oldset);
else
#endif
- err = setup_signal_stack_si(sp, signr, ka, regs, info, oldset);
+ err = setup_signal_stack_si(sp, ksig, regs, oldset);
- if (err)
- force_sigsegv(signr, current);
- else
- signal_delivered(signr, info, ka, regs, singlestep);
+ signal_setup_done(err, ksig, singlestep);
}
static int kern_do_signal(struct pt_regs *regs)
{
- struct k_sigaction ka_copy;
- struct siginfo info;
- int sig, handled_sig = 0;
+ struct ksignal ksig;
+ int handled_sig = 0;
- while ((sig = get_signal_to_deliver(&info, &ka_copy, regs, NULL)) > 0) {
+ while (get_signal(&ksig)) {
handled_sig = 1;
/* Whee! Actually deliver the signal. */
- handle_signal(regs, sig, &ka_copy, &info);
+ handle_signal(&ksig, regs);
}
/* Did we come from a system call? */
diff --git a/arch/x86/um/signal.c b/arch/x86/um/signal.c
index 5e04a1c..79d8245 100644
--- a/arch/x86/um/signal.c
+++ b/arch/x86/um/signal.c
@@ -370,13 +370,12 @@ struct rt_sigframe
char retcode[8];
};
-int setup_signal_stack_sc(unsigned long stack_top, int sig,
- struct k_sigaction *ka, struct pt_regs *regs,
- sigset_t *mask)
+int setup_signal_stack_sc(unsigned long stack_top, struct ksignal *ksig,
+ struct pt_regs *regs, sigset_t *mask)
{
struct sigframe __user *frame;
void __user *restorer;
- int err = 0;
+ int err = 0, sig = ksig->sig;
/* This is the same calculation as i386 - ((sp + 4) & 15) == 0 */
stack_top = ((stack_top + 4) & -16UL) - 4;
@@ -385,8 +384,8 @@ int setup_signal_stack_sc(unsigned long stack_top, int sig,
return 1;
restorer = frame->retcode;
- if (ka->sa.sa_flags & SA_RESTORER)
- restorer = ka->sa.sa_restorer;
+ if (ksig->ka.sa.sa_flags & SA_RESTORER)
+ restorer = ksig->ka.sa.sa_restorer;
err |= __put_user(restorer, &frame->pretcode);
err |= __put_user(sig, &frame->sig);
@@ -410,20 +409,19 @@ int setup_signal_stack_sc(unsigned long stack_top, int sig,
return err;
PT_REGS_SP(regs) = (unsigned long) frame;
- PT_REGS_IP(regs) = (unsigned long) ka->sa.sa_handler;
+ PT_REGS_IP(regs) = (unsigned long) ksig->ka.sa.sa_handler;
PT_REGS_AX(regs) = (unsigned long) sig;
PT_REGS_DX(regs) = (unsigned long) 0;
PT_REGS_CX(regs) = (unsigned long) 0;
return 0;
}
-int setup_signal_stack_si(unsigned long stack_top, int sig,
- struct k_sigaction *ka, struct pt_regs *regs,
- siginfo_t *info, sigset_t *mask)
+int setup_signal_stack_si(unsigned long stack_top, struct ksignal *ksig,
+ struct pt_regs *regs, sigset_t *mask)
{
struct rt_sigframe __user *frame;
void __user *restorer;
- int err = 0;
+ int err = 0, sig = ksig->sig;
stack_top &= -8UL;
frame = (struct rt_sigframe __user *) stack_top - 1;
@@ -431,14 +429,14 @@ int setup_signal_stack_si(unsigned long stack_top, int sig,
return 1;
restorer = frame->retcode;
- if (ka->sa.sa_flags & SA_RESTORER)
- restorer = ka->sa.sa_restorer;
+ if (ksig->ka.sa.sa_flags & SA_RESTORER)
+ restorer = ksig->ka.sa.sa_restorer;
err |= __put_user(restorer, &frame->pretcode);
err |= __put_user(sig, &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);
err |= copy_ucontext_to_user(&frame->uc, &frame->fpstate, mask,
PT_REGS_SP(regs));
@@ -457,7 +455,7 @@ int setup_signal_stack_si(unsigned long stack_top, int sig,
return err;
PT_REGS_SP(regs) = (unsigned long) frame;
- PT_REGS_IP(regs) = (unsigned long) ka->sa.sa_handler;
+ PT_REGS_IP(regs) = (unsigned long) ksig->ka.sa.sa_handler;
PT_REGS_AX(regs) = (unsigned long) sig;
PT_REGS_DX(regs) = (unsigned long) &frame->info;
PT_REGS_CX(regs) = (unsigned long) &frame->uc;
@@ -502,12 +500,11 @@ struct rt_sigframe
struct _fpstate fpstate;
};
-int setup_signal_stack_si(unsigned long stack_top, int sig,
- struct k_sigaction *ka, struct pt_regs * regs,
- siginfo_t *info, sigset_t *set)
+int setup_signal_stack_si(unsigned long stack_top, struct ksignal *ksig,
+ struct pt_regs *regs, sigset_t *set)
{
struct rt_sigframe __user *frame;
- int err = 0;
+ int err = 0, sig = ksig->sig;
frame = (struct rt_sigframe __user *)
round_down(stack_top - sizeof(struct rt_sigframe), 16);
@@ -517,8 +514,8 @@ int setup_signal_stack_si(unsigned long stack_top, int sig,
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
goto out;
- if (ka->sa.sa_flags & SA_SIGINFO) {
- err |= copy_siginfo_to_user(&frame->info, info);
+ if (ksig->ka.sa.sa_flags & SA_SIGINFO) {
+ err |= copy_siginfo_to_user(&frame->info, &ksig->info);
if (err)
goto out;
}
@@ -543,8 +540,8 @@ int setup_signal_stack_si(unsigned long stack_top, int sig,
* already in userspace.
*/
/* x86-64 should always use SA_RESTORER. */
- if (ka->sa.sa_flags & SA_RESTORER)
- err |= __put_user(ka->sa.sa_restorer, &frame->pretcode);
+ if (ksig->ka.sa.sa_flags & SA_RESTORER)
+ err |= __put_user(ksig->ka.sa.sa_restorer, &frame->pretcode);
else
/* could use a vstub here */
return err;
@@ -570,7 +567,7 @@ int setup_signal_stack_si(unsigned long stack_top, int sig,
*/
PT_REGS_SI(regs) = (unsigned long) &frame->info;
PT_REGS_DX(regs) = (unsigned long) &frame->uc;
- PT_REGS_IP(regs) = (unsigned long) ka->sa.sa_handler;
+ PT_REGS_IP(regs) = (unsigned long) ksig->ka.sa.sa_handler;
out:
return err;
}
--
1.8.4.5
--
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