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-rw-r--r--arch/s390/Kconfig1
-rw-r--r--arch/s390/kernel/compat_linux.h9
-rw-r--r--arch/s390/kernel/compat_signal.c57
-rw-r--r--arch/s390/kernel/compat_wrapper.S5
-rw-r--r--arch/s390/kernel/entry.h1
-rw-r--r--arch/s390/kernel/signal.c15
-rw-r--r--arch/s390/kernel/syscalls.S2
7 files changed, 7 insertions, 83 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index b5ea38c25647..117f3151cc13 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -140,6 +140,7 @@ config S390
select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_RELA
select CLONE_BACKWARDS2
+ select GENERIC_SIGALTSTACK
config SCHED_OMIT_FRAME_POINTER
def_bool y
diff --git a/arch/s390/kernel/compat_linux.h b/arch/s390/kernel/compat_linux.h
index d4d0239970ac..e2b2a51cf49b 100644
--- a/arch/s390/kernel/compat_linux.h
+++ b/arch/s390/kernel/compat_linux.h
@@ -75,17 +75,11 @@ struct sigaction32 {
compat_sigset_t sa_mask; /* mask last for extensibility */
};
-typedef struct {
- __u32 ss_sp; /* pointer */
- int ss_flags;
- compat_size_t ss_size;
-} stack_t32;
-
/* asm/ucontext.h */
struct ucontext32 {
__u32 uc_flags;
__u32 uc_link; /* pointer */
- stack_t32 uc_stack;
+ compat_stack_t uc_stack;
_sigregs32 uc_mcontext;
compat_sigset_t uc_sigmask; /* mask last for extensibility */
};
@@ -153,5 +147,4 @@ long sys32_sigaction(int sig, const struct old_sigaction32 __user *act,
struct old_sigaction32 __user *oact);
long sys32_rt_sigaction(int sig, const struct sigaction32 __user *act,
struct sigaction32 __user *oact, size_t sigsetsize);
-long sys32_sigaltstack(const stack_t32 __user *uss, stack_t32 __user *uoss);
#endif /* _ASM_S390X_S390_H */
diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c
index 593fcc9253fc..eacb0d6058a3 100644
--- a/arch/s390/kernel/compat_signal.c
+++ b/arch/s390/kernel/compat_signal.c
@@ -234,45 +234,6 @@ sys32_rt_sigaction(int sig, const struct sigaction32 __user *act,
return ret;
}
-asmlinkage long
-sys32_sigaltstack(const stack_t32 __user *uss, stack_t32 __user *uoss)
-{
- struct pt_regs *regs = task_pt_regs(current);
- stack_t kss, koss;
- unsigned long ss_sp;
- int ret, err = 0;
- mm_segment_t old_fs = get_fs();
-
- if (uss) {
- if (!access_ok(VERIFY_READ, uss, sizeof(*uss)))
- return -EFAULT;
- err |= __get_user(ss_sp, &uss->ss_sp);
- err |= __get_user(kss.ss_size, &uss->ss_size);
- err |= __get_user(kss.ss_flags, &uss->ss_flags);
- if (err)
- return -EFAULT;
- kss.ss_sp = (void __user *) ss_sp;
- }
-
- set_fs (KERNEL_DS);
- ret = do_sigaltstack((stack_t __force __user *) (uss ? &kss : NULL),
- (stack_t __force __user *) (uoss ? &koss : NULL),
- regs->gprs[15]);
- set_fs (old_fs);
-
- if (!ret && uoss) {
- if (!access_ok(VERIFY_WRITE, uoss, sizeof(*uoss)))
- return -EFAULT;
- ss_sp = (unsigned long) koss.ss_sp;
- err |= __put_user(ss_sp, &uoss->ss_sp);
- err |= __put_user(koss.ss_size, &uoss->ss_size);
- err |= __put_user(koss.ss_flags, &uoss->ss_flags);
- if (err)
- return -EFAULT;
- }
- return ret;
-}
-
static int save_sigregs32(struct pt_regs *regs, _sigregs32 __user *sregs)
{
_s390_regs_common32 regs32;
@@ -380,10 +341,6 @@ asmlinkage long sys32_rt_sigreturn(void)
struct pt_regs *regs = task_pt_regs(current);
rt_sigframe32 __user *frame = (rt_sigframe32 __user *)regs->gprs[15];
sigset_t set;
- stack_t st;
- __u32 ss_sp;
- int err;
- mm_segment_t old_fs = get_fs();
if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
@@ -394,15 +351,8 @@ asmlinkage long sys32_rt_sigreturn(void)
goto badframe;
if (restore_sigregs_gprs_high(regs, frame->gprs_high))
goto badframe;
- err = __get_user(ss_sp, &frame->uc.uc_stack.ss_sp);
- st.ss_sp = compat_ptr(ss_sp);
- err |= __get_user(st.ss_size, &frame->uc.uc_stack.ss_size);
- err |= __get_user(st.ss_flags, &frame->uc.uc_stack.ss_flags);
- if (err)
+ if (compat_restore_altstack(&frame->uc.uc_stack))
goto badframe;
- set_fs (KERNEL_DS);
- do_sigaltstack((stack_t __force __user *)&st, NULL, regs->gprs[15]);
- set_fs (old_fs);
return regs->gprs[2];
badframe:
force_sig(SIGSEGV, current);
@@ -530,10 +480,7 @@ static int setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info,
/* Create the ucontext. */
err |= __put_user(UC_EXTENDED, &frame->uc.uc_flags);
err |= __put_user(0, &frame->uc.uc_link);
- err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
- err |= __put_user(sas_ss_flags(regs->gprs[15]),
- &frame->uc.uc_stack.ss_flags);
- err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
+ err |= __compat_save_altstack(&frame->uc.uc_stack, regs->gprs[15]);
err |= save_sigregs32(regs, &frame->uc.uc_mcontext);
err |= save_sigregs_gprs_high(regs, frame->gprs_high);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
diff --git a/arch/s390/kernel/compat_wrapper.S b/arch/s390/kernel/compat_wrapper.S
index 9b9a805656b5..3c3b9c8b90c1 100644
--- a/arch/s390/kernel/compat_wrapper.S
+++ b/arch/s390/kernel/compat_wrapper.S
@@ -760,11 +760,6 @@ ENTRY(sys32_capset_wrapper)
llgtr %r3,%r3 # const cap_user_data_t
jg sys_capset # branch to system call
-ENTRY(sys32_sigaltstack_wrapper)
- llgtr %r2,%r2 # const stack_emu31_t *
- llgtr %r3,%r3 # stack_emu31_t *
- jg sys32_sigaltstack
-
ENTRY(sys32_sendfile_wrapper)
lgfr %r2,%r2 # int
lgfr %r3,%r3 # int
diff --git a/arch/s390/kernel/entry.h b/arch/s390/kernel/entry.h
index 2711936fe706..d56319aa1d56 100644
--- a/arch/s390/kernel/entry.h
+++ b/arch/s390/kernel/entry.h
@@ -76,7 +76,6 @@ long sys_s390_fallocate(int fd, int mode, loff_t offset, u32 len_high,
long sys_sigsuspend(int history0, int history1, old_sigset_t mask);
long sys_sigaction(int sig, const struct old_sigaction __user *act,
struct old_sigaction __user *oact);
-long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss);
long sys_sigreturn(void);
long sys_rt_sigreturn(void);
long sys32_sigreturn(void);
diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c
index c3ff70a7b247..fda41480b0bd 100644
--- a/arch/s390/kernel/signal.c
+++ b/arch/s390/kernel/signal.c
@@ -89,13 +89,6 @@ SYSCALL_DEFINE3(sigaction, int, sig, const struct old_sigaction __user *, act,
return ret;
}
-SYSCALL_DEFINE2(sigaltstack, const stack_t __user *, uss,
- stack_t __user *, uoss)
-{
- struct pt_regs *regs = task_pt_regs(current);
- return do_sigaltstack(uss, uoss, regs->gprs[15]);
-}
-
/* Returns non-zero on fault. */
static int save_sigregs(struct pt_regs *regs, _sigregs __user *sregs)
{
@@ -190,8 +183,7 @@ SYSCALL_DEFINE0(rt_sigreturn)
set_current_blocked(&set);
if (restore_sigregs(regs, &frame->uc.uc_mcontext))
goto badframe;
- if (do_sigaltstack(&frame->uc.uc_stack, NULL,
- regs->gprs[15]) == -EFAULT)
+ if (restore_altstack(&frame->uc.uc_stack))
goto badframe;
return regs->gprs[2];
badframe:
@@ -325,10 +317,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
/* Create the ucontext. */
err |= __put_user(0, &frame->uc.uc_flags);
err |= __put_user(NULL, &frame->uc.uc_link);
- err |= __put_user((void __user *)current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
- err |= __put_user(sas_ss_flags(regs->gprs[15]),
- &frame->uc.uc_stack.ss_flags);
- err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
+ err |= __save_altstack(&frame->uc.uc_stack, regs->gprs[15]);
err |= save_sigregs(regs, &frame->uc.uc_mcontext);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
if (err)
diff --git a/arch/s390/kernel/syscalls.S b/arch/s390/kernel/syscalls.S
index 6a6c61f94dd3..65547cb9ac7b 100644
--- a/arch/s390/kernel/syscalls.S
+++ b/arch/s390/kernel/syscalls.S
@@ -194,7 +194,7 @@ SYSCALL(sys_chown16,sys_ni_syscall,sys32_chown16_wrapper) /* old chown16 syscall
SYSCALL(sys_getcwd,sys_getcwd,sys32_getcwd_wrapper)
SYSCALL(sys_capget,sys_capget,sys32_capget_wrapper)
SYSCALL(sys_capset,sys_capset,sys32_capset_wrapper) /* 185 */
-SYSCALL(sys_sigaltstack,sys_sigaltstack,sys32_sigaltstack_wrapper)
+SYSCALL(sys_sigaltstack,sys_sigaltstack,compat_sys_sigaltstack)
SYSCALL(sys_sendfile,sys_sendfile64,sys32_sendfile_wrapper)
NI_SYSCALL /* streams1 */
NI_SYSCALL /* streams2 */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 11:53:48 +0100