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Message-ID: <lsq.1556377989.493953240@decadent.org.uk>
Date: Sat, 27 Apr 2019 16:13:09 +0100
From: Ben Hutchings <ben@...adent.org.uk>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC: akpm@...ux-foundation.org, Denis Kirjanov <kda@...ux-powerpc.org>,
"Richard Weinberger" <richard@....at>
Subject: [PATCH 3.16 119/202] mips: Use get_signal() signal_setup_done()
3.16.66-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Richard Weinberger <richard@....at>
commit 81d103bf80678669c56658185e758fc3f9845d71 upstream.
Use the more generic functions get_signal() signal_setup_done()
for signal delivery.
Signed-off-by: Richard Weinberger <richard@....at>
[bwh: Backported to 3.16 as dependency of commit 35634ffa1751
"signal: Always notice exiting tasks"]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
arch/mips/include/asm/abi.h | 10 ++---
arch/mips/kernel/signal-common.h | 2 +-
arch/mips/kernel/signal.c | 66 ++++++++++++--------------------
arch/mips/kernel/signal32.c | 39 ++++++++-----------
arch/mips/kernel/signal_n32.c | 20 ++++------
5 files changed, 53 insertions(+), 84 deletions(-)
--- a/arch/mips/include/asm/abi.h
+++ b/arch/mips/include/asm/abi.h
@@ -13,13 +13,11 @@
#include <asm/siginfo.h>
struct mips_abi {
- int (* const setup_frame)(void *sig_return, struct k_sigaction *ka,
- struct pt_regs *regs, int signr,
- sigset_t *set);
+ int (* const setup_frame)(void *sig_return, struct ksignal *ksig,
+ struct pt_regs *regs, sigset_t *set);
const unsigned long signal_return_offset;
- int (* const setup_rt_frame)(void *sig_return, struct k_sigaction *ka,
- struct pt_regs *regs, int signr,
- sigset_t *set, siginfo_t *info);
+ int (* const setup_rt_frame)(void *sig_return, struct ksignal *ksig,
+ struct pt_regs *regs, sigset_t *set);
const unsigned long rt_signal_return_offset;
const unsigned long restart;
};
--- a/arch/mips/kernel/signal-common.h
+++ b/arch/mips/kernel/signal-common.h
@@ -22,7 +22,7 @@
/*
* Determine which stack to use..
*/
-extern void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
+extern void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs,
size_t frame_size);
/* Check and clear pending FPU exceptions in saved CSR */
extern int fpcsr_pending(unsigned int __user *fpcsr);
--- a/arch/mips/kernel/signal.c
+++ b/arch/mips/kernel/signal.c
@@ -428,20 +428,20 @@ badframe:
}
#ifdef CONFIG_TRAD_SIGNALS
-static int setup_frame(void *sig_return, struct k_sigaction *ka,
- struct pt_regs *regs, int signr, sigset_t *set)
+static int setup_frame(void *sig_return, struct ksignal *ksig,
+ struct pt_regs *regs, sigset_t *set)
{
struct sigframe __user *frame;
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(regs, &frame->sf_sc);
err |= __copy_to_user(&frame->sf_mask, set, sizeof(*set));
if (err)
- goto give_sigsegv;
+ return -EFAULT;
/*
* Arguments to signal handler:
@@ -453,37 +453,32 @@ static int setup_frame(void *sig_return,
* $25 and c0_epc point to the signal handler, $29 points to the
* struct sigframe.
*/
- regs->regs[ 4] = signr;
+ regs->regs[ 4] = ksig->sig;
regs->regs[ 5] = 0;
regs->regs[ 6] = (unsigned long) &frame->sf_sc;
regs->regs[29] = (unsigned long) frame;
regs->regs[31] = (unsigned long) sig_return;
- regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler;
+ regs->cp0_epc = regs->regs[25] = (unsigned long) ksig->ka.sa.sa_handler;
DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
current->comm, current->pid,
frame, regs->cp0_epc, regs->regs[31]);
return 0;
-
-give_sigsegv:
- force_sigsegv(signr, current);
- return -EFAULT;
}
#endif
-static int setup_rt_frame(void *sig_return, struct k_sigaction *ka,
- struct pt_regs *regs, int signr, sigset_t *set,
- siginfo_t *info)
+static int setup_rt_frame(void *sig_return, struct ksignal *ksig,
+ struct pt_regs *regs, sigset_t *set)
{
struct rt_sigframe __user *frame;
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;
/* Create siginfo. */
- err |= copy_siginfo_to_user(&frame->rs_info, info);
+ err |= copy_siginfo_to_user(&frame->rs_info, &ksig->info);
/* Create the ucontext. */
err |= __put_user(0, &frame->rs_uc.uc_flags);
@@ -493,7 +488,7 @@ static int setup_rt_frame(void *sig_retu
err |= __copy_to_user(&frame->rs_uc.uc_sigmask, set, sizeof(*set));
if (err)
- goto give_sigsegv;
+ return -EFAULT;
/*
* Arguments to signal handler:
@@ -505,22 +500,18 @@ static int setup_rt_frame(void *sig_retu
* $25 and c0_epc point to the signal handler, $29 points to
* the struct rt_sigframe.
*/
- regs->regs[ 4] = signr;
+ regs->regs[ 4] = ksig->sig;
regs->regs[ 5] = (unsigned long) &frame->rs_info;
regs->regs[ 6] = (unsigned long) &frame->rs_uc;
regs->regs[29] = (unsigned long) frame;
regs->regs[31] = (unsigned long) sig_return;
- regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler;
+ regs->cp0_epc = regs->regs[25] = (unsigned long) ksig->ka.sa.sa_handler;
DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
current->comm, current->pid,
frame, regs->cp0_epc, regs->regs[31]);
return 0;
-
-give_sigsegv:
- force_sigsegv(signr, current);
- return -EFAULT;
}
struct mips_abi mips_abi = {
@@ -534,8 +525,7 @@ struct mips_abi mips_abi = {
.restart = __NR_restart_syscall
};
-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;
@@ -557,7 +547,7 @@ static void handle_signal(unsigned long
regs->regs[2] = EINTR;
break;
case ERESTARTSYS:
- if (!(ka->sa.sa_flags & SA_RESTART)) {
+ if (!(ksig->ka.sa.sa_flags & SA_RESTART)) {
regs->regs[2] = EINTR;
break;
}
@@ -571,29 +561,23 @@ static void handle_signal(unsigned long
regs->regs[0] = 0; /* Don't deal with this again. */
}
- if (sig_uses_siginfo(ka))
+ if (sig_uses_siginfo(&ksig->ka))
ret = abi->setup_rt_frame(vdso + abi->rt_signal_return_offset,
- ka, regs, sig, oldset, info);
+ ksig, regs, oldset);
else
- ret = abi->setup_frame(vdso + abi->signal_return_offset,
- ka, regs, sig, oldset);
-
- if (ret)
- return;
+ ret = abi->setup_frame(vdso + abi->signal_return_offset, ksig,
+ regs, oldset);
- signal_delivered(sig, info, ka, regs, 0);
+ signal_setup_done(ret, ksig, 0);
}
static void do_signal(struct pt_regs *regs)
{
- struct k_sigaction ka;
- siginfo_t info;
- int signr;
+ struct ksignal ksig;
- signr = get_signal_to_deliver(&info, &ka, regs, NULL);
- if (signr > 0) {
+ if (get_signal(&ksig)) {
/* Whee! Actually deliver the signal. */
- handle_signal(signr, &info, &ka, regs);
+ handle_signal(&ksig, regs);
return;
}
--- a/arch/mips/kernel/signal32.c
+++ b/arch/mips/kernel/signal32.c
@@ -488,21 +488,21 @@ badframe:
force_sig(SIGSEGV, current);
}
-static int setup_frame_32(void *sig_return, struct k_sigaction *ka,
- struct pt_regs *regs, int signr, sigset_t *set)
+static int setup_frame_32(void *sig_return, struct ksignal *ksig,
+ struct pt_regs *regs, sigset_t *set)
{
struct sigframe32 __user *frame;
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_sigcontext32(regs, &frame->sf_sc);
err |= __copy_conv_sigset_to_user(&frame->sf_mask, set);
if (err)
- goto give_sigsegv;
+ return -EFAULT;
/*
* Arguments to signal handler:
@@ -514,37 +514,32 @@ static int setup_frame_32(void *sig_retu
* $25 and c0_epc point to the signal handler, $29 points to the
* struct sigframe.
*/
- regs->regs[ 4] = signr;
+ regs->regs[ 4] = ksig->sig;
regs->regs[ 5] = 0;
regs->regs[ 6] = (unsigned long) &frame->sf_sc;
regs->regs[29] = (unsigned long) frame;
regs->regs[31] = (unsigned long) sig_return;
- regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler;
+ regs->cp0_epc = regs->regs[25] = (unsigned long) ksig->ka.sa.sa_handler;
DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
current->comm, current->pid,
frame, regs->cp0_epc, regs->regs[31]);
return 0;
-
-give_sigsegv:
- force_sigsegv(signr, current);
- return -EFAULT;
}
-static int setup_rt_frame_32(void *sig_return, struct k_sigaction *ka,
- struct pt_regs *regs, int signr, sigset_t *set,
- siginfo_t *info)
+static int setup_rt_frame_32(void *sig_return, struct ksignal *ksig,
+ struct pt_regs *regs, sigset_t *set)
{
struct rt_sigframe32 __user *frame;
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;
/* Convert (siginfo_t -> compat_siginfo_t) and copy to user. */
- err |= copy_siginfo_to_user32(&frame->rs_info, info);
+ err |= copy_siginfo_to_user32(&frame->rs_info, &ksig->info);
/* Create the ucontext. */
err |= __put_user(0, &frame->rs_uc.uc_flags);
@@ -554,7 +549,7 @@ static int setup_rt_frame_32(void *sig_r
err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set);
if (err)
- goto give_sigsegv;
+ return -EFAULT;
/*
* Arguments to signal handler:
@@ -566,22 +561,18 @@ static int setup_rt_frame_32(void *sig_r
* $25 and c0_epc point to the signal handler, $29 points to
* the struct rt_sigframe32.
*/
- regs->regs[ 4] = signr;
+ regs->regs[ 4] = ksig->sig;
regs->regs[ 5] = (unsigned long) &frame->rs_info;
regs->regs[ 6] = (unsigned long) &frame->rs_uc;
regs->regs[29] = (unsigned long) frame;
regs->regs[31] = (unsigned long) sig_return;
- regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler;
+ regs->cp0_epc = regs->regs[25] = (unsigned long) ksig->ka.sa.sa_handler;
DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
current->comm, current->pid,
frame, regs->cp0_epc, regs->regs[31]);
return 0;
-
-give_sigsegv:
- force_sigsegv(signr, current);
- return -EFAULT;
}
/*
--- a/arch/mips/kernel/signal_n32.c
+++ b/arch/mips/kernel/signal_n32.c
@@ -102,18 +102,18 @@ badframe:
force_sig(SIGSEGV, current);
}
-static int setup_rt_frame_n32(void *sig_return, struct k_sigaction *ka,
- struct pt_regs *regs, int signr, sigset_t *set, siginfo_t *info)
+static int setup_rt_frame_n32(void *sig_return, struct ksignal *ksig,
+ struct pt_regs *regs, sigset_t *set)
{
struct rt_sigframe_n32 __user *frame;
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;
/* Create siginfo. */
- err |= copy_siginfo_to_user32(&frame->rs_info, info);
+ err |= copy_siginfo_to_user32(&frame->rs_info, &ksig->info);
/* Create the ucontext. */
err |= __put_user(0, &frame->rs_uc.uc_flags);
@@ -123,7 +123,7 @@ static int setup_rt_frame_n32(void *sig_
err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set);
if (err)
- goto give_sigsegv;
+ return -EFAULT;
/*
* Arguments to signal handler:
@@ -135,22 +135,18 @@ static int setup_rt_frame_n32(void *sig_
* $25 and c0_epc point to the signal handler, $29 points to
* the struct rt_sigframe.
*/
- regs->regs[ 4] = signr;
+ regs->regs[ 4] = ksig->sig;
regs->regs[ 5] = (unsigned long) &frame->rs_info;
regs->regs[ 6] = (unsigned long) &frame->rs_uc;
regs->regs[29] = (unsigned long) frame;
regs->regs[31] = (unsigned long) sig_return;
- regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler;
+ regs->cp0_epc = regs->regs[25] = (unsigned long) ksig->ka.sa.sa_handler;
DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
current->comm, current->pid,
frame, regs->cp0_epc, regs->regs[31]);
return 0;
-
-give_sigsegv:
- force_sigsegv(signr, current);
- return -EFAULT;
}
struct mips_abi mips_abi_n32 = {
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