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authorLinus Torvalds <torvalds@linux-foundation.org>2014-08-09 20:58:12 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-09 20:58:12 +0400
commit63b12bdb0d21aca527996fb2c547387bfd3e14b8 (patch)
tree6ab83b2a1c289f30fea18b88f04138ee69c37c6f /arch/mips
parentad1f5caf34390bb20fdbb4eaf71b0494e89936f0 (diff)
parent059ade650ae57cfd371af690fdba887af04aded8 (diff)
downloadlinux-63b12bdb0d21aca527996fb2c547387bfd3e14b8.tar.xz
Merge branch 'signal-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc
Pull arch signal handling cleanup from Richard Weinberger: "This patch series moves all remaining archs to the get_signal(), signal_setup_done() and sigsp() functions. Currently these archs use open coded variants of the said functions. Further, unused parameters get removed from get_signal_to_deliver(), tracehook_signal_handler() and signal_delivered(). At the end of the day we save around 500 lines of code." * 'signal-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc: (43 commits) powerpc: Use sigsp() openrisc: Use sigsp() mn10300: Use sigsp() mips: Use sigsp() microblaze: Use sigsp() metag: Use sigsp() m68k: Use sigsp() m32r: Use sigsp() hexagon: Use sigsp() frv: Use sigsp() cris: Use sigsp() c6x: Use sigsp() blackfin: Use sigsp() avr32: Use sigsp() arm64: Use sigsp() arc: Use sigsp() sas_ss_flags: Remove nested ternary if Rip out get_signal_to_deliver() Clean up signal_delivered() tracehook_signal_handler: Remove sig, info, ka and regs ...
Diffstat (limited to 'arch/mips')
-rw-r--r--arch/mips/include/asm/abi.h10
-rw-r--r--arch/mips/kernel/signal-common.h2
-rw-r--r--arch/mips/kernel/signal.c72
-rw-r--r--arch/mips/kernel/signal32.c39
-rw-r--r--arch/mips/kernel/signal_n32.c20
5 files changed, 55 insertions, 88 deletions
diff --git a/arch/mips/include/asm/abi.h b/arch/mips/include/asm/abi.h
index 909bb6984866..7186bb51b89b 100644
--- 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;
};
diff --git a/arch/mips/kernel/signal-common.h b/arch/mips/kernel/signal-common.h
index 9c60d09e62a7..06805e09bcd3 100644
--- 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);
diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c
index 9e60d117e41e..1d57605e4615 100644
--- a/arch/mips/kernel/signal.c
+++ b/arch/mips/kernel/signal.c
@@ -280,7 +280,7 @@ int restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
return err;
}
-void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
+void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs,
size_t frame_size)
{
unsigned long sp;
@@ -295,9 +295,7 @@ void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
*/
sp -= 32;
- /* This is the X/Open sanctioned signal stack switching. */
- if ((ka->sa.sa_flags & SA_ONSTACK) && (sas_ss_flags (sp) == 0))
- sp = current->sas_ss_sp + current->sas_ss_size;
+ sp = sigsp(sp, ksig);
return (void __user *)((sp - frame_size) & (ICACHE_REFILLS_WORKAROUND_WAR ? ~(cpu_icache_line_size()-1) : ALMASK));
}
@@ -428,20 +426,20 @@ 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, 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 +451,32 @@ static int setup_frame(void *sig_return, struct k_sigaction *ka,
* $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, 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 +486,7 @@ static int setup_rt_frame(void *sig_return, struct k_sigaction *ka,
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 +498,18 @@ static int setup_rt_frame(void *sig_return, struct k_sigaction *ka,
* $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 +523,7 @@ 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 +545,7 @@ static void handle_signal(unsigned long sig, siginfo_t *info,
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 +559,23 @@ static void handle_signal(unsigned long sig, siginfo_t *info,
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;
}
diff --git a/arch/mips/kernel/signal32.c b/arch/mips/kernel/signal32.c
index bae2e6ee2109..d69179c0d49d 100644
--- a/arch/mips/kernel/signal32.c
+++ b/arch/mips/kernel/signal32.c
@@ -490,21 +490,21 @@ 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, 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:
@@ -516,37 +516,32 @@ static int setup_frame_32(void *sig_return, struct k_sigaction *ka,
* $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, 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);
@@ -556,7 +551,7 @@ static int setup_rt_frame_32(void *sig_return, struct k_sigaction *ka,
err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set);
if (err)
- goto give_sigsegv;
+ return -EFAULT;
/*
* Arguments to signal handler:
@@ -568,22 +563,18 @@ static int setup_rt_frame_32(void *sig_return, struct k_sigaction *ka,
* $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;
}
/*
diff --git a/arch/mips/kernel/signal_n32.c b/arch/mips/kernel/signal_n32.c
index b2241bb9cac1..f1d4751eead0 100644
--- 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, 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_return, struct k_sigaction *ka,
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_return, struct k_sigaction *ka,
* $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 = {