diff options
Diffstat (limited to 'arch/riscv/kernel/signal.c')
| -rw-r--r-- | arch/riscv/kernel/signal.c | 38 |
1 files changed, 10 insertions, 28 deletions
diff --git a/arch/riscv/kernel/signal.c b/arch/riscv/kernel/signal.c index bfb2afa4135f..9aff9d720590 100644 --- a/arch/riscv/kernel/signal.c +++ b/arch/riscv/kernel/signal.c @@ -12,6 +12,7 @@ #include <linux/syscalls.h> #include <linux/resume_user_mode.h> #include <linux/linkage.h> +#include <linux/entry-common.h> #include <asm/ucontext.h> #include <asm/vdso.h> @@ -19,6 +20,7 @@ #include <asm/signal32.h> #include <asm/switch_to.h> #include <asm/csr.h> +#include <asm/cacheflush.h> extern u32 __user_rt_sigreturn[2]; @@ -181,6 +183,7 @@ static int setup_rt_frame(struct ksignal *ksig, sigset_t *set, { struct rt_sigframe __user *frame; long err = 0; + unsigned long __maybe_unused addr; frame = get_sigframe(ksig, regs, sizeof(*frame)); if (!access_ok(frame, sizeof(*frame))) @@ -209,7 +212,12 @@ static int setup_rt_frame(struct ksignal *ksig, sigset_t *set, if (copy_to_user(&frame->sigreturn_code, __user_rt_sigreturn, sizeof(frame->sigreturn_code))) return -EFAULT; - regs->ra = (unsigned long)&frame->sigreturn_code; + + addr = (unsigned long)&frame->sigreturn_code; + /* Make sure the two instructions are pushed to icache. */ + flush_icache_range(addr, addr + sizeof(frame->sigreturn_code)); + + regs->ra = addr; #endif /* CONFIG_MMU */ /* @@ -274,7 +282,7 @@ static void handle_signal(struct ksignal *ksig, struct pt_regs *regs) signal_setup_done(ret, ksig, 0); } -static void do_signal(struct pt_regs *regs) +void arch_do_signal_or_restart(struct pt_regs *regs) { struct ksignal ksig; @@ -311,29 +319,3 @@ static void do_signal(struct pt_regs *regs) */ restore_saved_sigmask(); } - -/* - * Handle any pending work on the resume-to-userspace path, as indicated by - * _TIF_WORK_MASK. Entered from assembly with IRQs off. - */ -asmlinkage __visible void do_work_pending(struct pt_regs *regs, - unsigned long thread_info_flags) -{ - do { - if (thread_info_flags & _TIF_NEED_RESCHED) { - schedule(); - } else { - local_irq_enable(); - if (thread_info_flags & _TIF_UPROBE) - uprobe_notify_resume(regs); - /* Handle pending signal delivery */ - if (thread_info_flags & (_TIF_SIGPENDING | - _TIF_NOTIFY_SIGNAL)) - do_signal(regs); - if (thread_info_flags & _TIF_NOTIFY_RESUME) - resume_user_mode_work(regs); - } - local_irq_disable(); - thread_info_flags = read_thread_flags(); - } while (thread_info_flags & _TIF_WORK_MASK); -} |