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-rw-r--r--arch/blackfin/kernel/signal.c287
1 files changed, 0 insertions, 287 deletions
diff --git a/arch/blackfin/kernel/signal.c b/arch/blackfin/kernel/signal.c
deleted file mode 100644
index 5f5172779204..000000000000
--- a/arch/blackfin/kernel/signal.c
+++ /dev/null
@@ -1,287 +0,0 @@
-/*
- * Copyright 2004-2010 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later
- */
-
-#include <linux/signal.h>
-#include <linux/syscalls.h>
-#include <linux/ptrace.h>
-#include <linux/tty.h>
-#include <linux/personality.h>
-#include <linux/binfmts.h>
-#include <linux/uaccess.h>
-#include <linux/tracehook.h>
-#include <linux/sched/task_stack.h>
-
-#include <asm/cacheflush.h>
-#include <asm/ucontext.h>
-#include <asm/fixed_code.h>
-#include <asm/syscall.h>
-
-/* Location of the trace bit in SYSCFG. */
-#define TRACE_BITS 0x0001
-
-struct fdpic_func_descriptor {
- unsigned long text;
- unsigned long GOT;
-};
-
-struct rt_sigframe {
- int sig;
- struct siginfo *pinfo;
- void *puc;
- /* This is no longer needed by the kernel, but unfortunately userspace
- * code expects it to be there. */
- char retcode[8];
- struct siginfo info;
- struct ucontext uc;
-};
-
-static inline int
-rt_restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, int *pr0)
-{
- unsigned long usp = 0;
- int err = 0;
-
- /* Always make any pending restarted system calls return -EINTR */
- current->restart_block.fn = do_no_restart_syscall;
-
-#define RESTORE(x) err |= __get_user(regs->x, &sc->sc_##x)
-
- /* restore passed registers */
- RESTORE(r0); RESTORE(r1); RESTORE(r2); RESTORE(r3);
- RESTORE(r4); RESTORE(r5); RESTORE(r6); RESTORE(r7);
- RESTORE(p0); RESTORE(p1); RESTORE(p2); RESTORE(p3);
- RESTORE(p4); RESTORE(p5);
- err |= __get_user(usp, &sc->sc_usp);
- wrusp(usp);
- RESTORE(a0w); RESTORE(a1w);
- RESTORE(a0x); RESTORE(a1x);
- RESTORE(astat);
- RESTORE(rets);
- RESTORE(pc);
- RESTORE(retx);
- RESTORE(fp);
- RESTORE(i0); RESTORE(i1); RESTORE(i2); RESTORE(i3);
- RESTORE(m0); RESTORE(m1); RESTORE(m2); RESTORE(m3);
- RESTORE(l0); RESTORE(l1); RESTORE(l2); RESTORE(l3);
- RESTORE(b0); RESTORE(b1); RESTORE(b2); RESTORE(b3);
- RESTORE(lc0); RESTORE(lc1);
- RESTORE(lt0); RESTORE(lt1);
- RESTORE(lb0); RESTORE(lb1);
- RESTORE(seqstat);
-
- regs->orig_p0 = -1; /* disable syscall checks */
-
- *pr0 = regs->r0;
- return err;
-}
-
-asmlinkage int sys_rt_sigreturn(void)
-{
- struct pt_regs *regs = current_pt_regs();
- unsigned long usp = rdusp();
- struct rt_sigframe *frame = (struct rt_sigframe *)(usp);
- sigset_t set;
- int r0;
-
- if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
- goto badframe;
- if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
- goto badframe;
-
- set_current_blocked(&set);
-
- if (rt_restore_sigcontext(regs, &frame->uc.uc_mcontext, &r0))
- goto badframe;
-
- if (restore_altstack(&frame->uc.uc_stack))
- goto badframe;
-
- return r0;
-
- badframe:
- force_sig(SIGSEGV, current);
- return 0;
-}
-
-static inline int rt_setup_sigcontext(struct sigcontext *sc, struct pt_regs *regs)
-{
- int err = 0;
-
-#define SETUP(x) err |= __put_user(regs->x, &sc->sc_##x)
-
- SETUP(r0); SETUP(r1); SETUP(r2); SETUP(r3);
- SETUP(r4); SETUP(r5); SETUP(r6); SETUP(r7);
- SETUP(p0); SETUP(p1); SETUP(p2); SETUP(p3);
- SETUP(p4); SETUP(p5);
- err |= __put_user(rdusp(), &sc->sc_usp);
- SETUP(a0w); SETUP(a1w);
- SETUP(a0x); SETUP(a1x);
- SETUP(astat);
- SETUP(rets);
- SETUP(pc);
- SETUP(retx);
- SETUP(fp);
- SETUP(i0); SETUP(i1); SETUP(i2); SETUP(i3);
- SETUP(m0); SETUP(m1); SETUP(m2); SETUP(m3);
- SETUP(l0); SETUP(l1); SETUP(l2); SETUP(l3);
- SETUP(b0); SETUP(b1); SETUP(b2); SETUP(b3);
- SETUP(lc0); SETUP(lc1);
- SETUP(lt0); SETUP(lt1);
- SETUP(lb0); SETUP(lb1);
- SETUP(seqstat);
-
- return err;
-}
-
-static inline void *get_sigframe(struct ksignal *ksig,
- size_t frame_size)
-{
- unsigned long usp = sigsp(rdusp(), ksig);
-
- return (void *)((usp - frame_size) & -8UL);
-}
-
-static int
-setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs)
-{
- struct rt_sigframe *frame;
- int err = 0;
-
- frame = get_sigframe(ksig, sizeof(*frame));
-
- err |= __put_user(ksig->sig, &frame->sig);
-
- err |= __put_user(&frame->info, &frame->pinfo);
- err |= __put_user(&frame->uc, &frame->puc);
- err |= copy_siginfo_to_user(&frame->info, &ksig->info);
-
- /* Create the ucontext. */
- err |= __put_user(0, &frame->uc.uc_flags);
- err |= __put_user(0, &frame->uc.uc_link);
- err |= __save_altstack(&frame->uc.uc_stack, rdusp());
- err |= rt_setup_sigcontext(&frame->uc.uc_mcontext, regs);
- err |= copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
-
- if (err)
- return -EFAULT;
-
- /* Set up registers for signal handler */
- if (current->personality & FDPIC_FUNCPTRS) {
- struct fdpic_func_descriptor __user *funcptr =
- (struct fdpic_func_descriptor *) ksig->ka.sa.sa_handler;
- u32 pc, p3;
- err |= __get_user(pc, &funcptr->text);
- err |= __get_user(p3, &funcptr->GOT);
- if (err)
- return -EFAULT;
- regs->pc = pc;
- regs->p3 = p3;
- } else
- regs->pc = (unsigned long)ksig->ka.sa.sa_handler;
- wrusp((unsigned long)frame);
- regs->rets = SIGRETURN_STUB;
-
- regs->r0 = frame->sig;
- regs->r1 = (unsigned long)(&frame->info);
- regs->r2 = (unsigned long)(&frame->uc);
-
- return 0;
-}
-
-static inline void
-handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler)
-{
- switch (regs->r0) {
- case -ERESTARTNOHAND:
- if (!has_handler)
- goto do_restart;
- regs->r0 = -EINTR;
- break;
-
- case -ERESTARTSYS:
- if (has_handler && !(ka->sa.sa_flags & SA_RESTART)) {
- regs->r0 = -EINTR;
- break;
- }
- /* fallthrough */
- case -ERESTARTNOINTR:
- do_restart:
- regs->p0 = regs->orig_p0;
- regs->r0 = regs->orig_r0;
- regs->pc -= 2;
- break;
-
- case -ERESTART_RESTARTBLOCK:
- regs->p0 = __NR_restart_syscall;
- regs->pc -= 2;
- break;
- }
-}
-
-/*
- * OK, we're invoking a handler
- */
-static void
-handle_signal(struct ksignal *ksig, struct pt_regs *regs)
-{
- int ret;
-
- /* are we from a system call? to see pt_regs->orig_p0 */
- if (regs->orig_p0 >= 0)
- /* If so, check system call restarting.. */
- handle_restart(regs, &ksig->ka, 1);
-
- /* set up the stack frame */
- ret = setup_rt_frame(ksig, sigmask_to_save(), regs);
-
- signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP));
-}
-
-/*
- * Note that 'init' is a special process: it doesn't get signals it doesn't
- * want to handle. Thus you cannot kill init even with a SIGKILL even by
- * mistake.
- *
- * Note that we go through the signals twice: once to check the signals
- * that the kernel can handle, and then we build all the user-level signal
- * handling stack-frames in one go after that.
- */
-asmlinkage void do_signal(struct pt_regs *regs)
-{
- struct ksignal ksig;
-
- current->thread.esp0 = (unsigned long)regs;
-
- if (get_signal(&ksig)) {
- /* Whee! Actually deliver the signal. */
- handle_signal(&ksig, regs);
- return;
- }
-
- /* Did we come from a system call? */
- if (regs->orig_p0 >= 0)
- /* Restart the system call - no handlers present */
- handle_restart(regs, NULL, 0);
-
- /* if there's no signal to deliver, we just put the saved sigmask
- * back */
- restore_saved_sigmask();
-}
-
-/*
- * notification of userspace execution resumption
- */
-asmlinkage void do_notify_resume(struct pt_regs *regs)
-{
- if (test_thread_flag(TIF_SIGPENDING))
- do_signal(regs);
-
- if (test_thread_flag(TIF_NOTIFY_RESUME)) {
- clear_thread_flag(TIF_NOTIFY_RESUME);
- tracehook_notify_resume(regs);
- }
-}
-
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.