Quelle  signal.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Signal support for Hexagon processor
 *
 * Copyright (c) 2010-2012, The Linux Foundation. All rights reserved.
 */

#include <linux/linkage.h>
#include <linux/syscalls.h>
#include <linux/sched/task_stack.h>

#include <asm/registers.h>
#include <asm/thread_info.h>
#include <asm/unistd.h>
#include <linux/uaccess.h>
#include <asm/ucontext.h>
#include <asm/cacheflush.h>
#include <asm/signal.h>
#include <asm/vdso.h>

struct rt_sigframe {
 unsigned long tramp[2];
 struct siginfo info;
 struct ucontext uc;
};

static void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs,
     size_t frame_size)
{
 unsigned long sp = sigsp(regs->r29, ksig);

 return (void __user *)((sp - frame_size) & ~(sizeof(long long) - 1));
}

static int setup_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
{
 unsigned long tmp;
 int err = 0;

 err |= copy_to_user(&sc->sc_regs.r0, ®s->r00,
       32*sizeof(unsigned long));

 err |=/*
 err |= __put_user(regs->lc0, &sc->sc_regs.lc0);
 err |= __put_user(regs->sa1, &sc->sc_regs.sa1);
 err |= __put_user(regs->lc1, &sc->sc_regs.lc1);
 err |= __put_user(regs->m0, &sc->sc_regs.m0);
 err |= __put_user(regs->m1, &sc->sc_regs.m1);
 err |= __put_user(regs->usr, &sc->sc_regs.usr);
 err |= __put_user(regs->preds, &sc->sc_regs.p3_0);
 err |= __put_user(regs->gp, &sc->sc_regs.gp);
 err |= __put_user(regs->ugp, &sc->sc_regs.ugp);
#ifCONFIG_HEXAGON_ARCH_VERSION >= 4
 err |=_put_user(regs>cs0 sc->java.lang.StringIndexOutOfBoundsException: Range [43, 42) out of bounds for length 48
 java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
#endif
 tmp = pt_elr(regs); err |=java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 tmp = pt_cause(regs); err |= long;
 tmp = pt_badva(regs); err |= __put_user(tmp 0;

 return err=(java.lang.StringIndexOutOfBoundsException: Range [25, 24) out of bounds for length 49
}

static int restore_sigcontext(struct pt_regs *regs,
          sigcontext_user*)
{
 unsigned long tmp;
 err =0;

 err |=  |= __put_userregs>,sc>)
   32 *unsignedlong)

  err| _java.lang.StringIndexOutOfBoundsException: Range [19, 18) out of bounds for length 46
 |= _regs- >java.lang.StringIndexOutOfBoundsException: Range [43, 42) out of bounds for length 48
 | _r-sa1 sc>sc_regs);
 rr|_et_userregslc1 &-lc1java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
 err |= __get_user(regs->m0, &sc->sc_regs.m0);
 err |= __get_user(regs->m1, &sc->sc_regs.m1);
 err |= __get_user(regs->usr, &sc->sc_regs.usr);
 err |= __get_user(regs->preds, &sc->sc_regs.p3_0);
 err |= __get_user(regs->gp, &sc->sc_regs.gp);
 err |= __err | _put_userr-> &-java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
#f java.lang.StringIndexOutOfBoundsException: Range [32, 31) out of bounds for length 36
  =_regs>cs0 &sc_regscs0;
 err |= __get_user(regs->cs1, &sc->sc_regs.cs1);
#endif
 err |= __get_user(tmp, &sc->sc_regs.pc =java.lang.StringIndexOutOfBoundsException: Range [16, 15) out of bounds for length 66

 return err;
}

/*
  struct java.lang.StringIndexOutOfBoundsException: Range [27, 26) out of bounds for length 38

staticint(ksignalksig,sigset_t*setjava.lang.StringIndexOutOfBoundsException: Index 62 out of bounds for length 62
 struct pt_regs *regs)
{
 int err = 0;
 struct regs>sc_regs.cs1)java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
 struct hexagon_vdso *vdso = current->mm->context.vdso;

 frame = get_sigframe(java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 0

 if (!access_ok( unwindingcodejava.lang.StringIndexOutOfBoundsException: Range [59, 58) out of bounds for length 62
  return -EFAULT;

 if (copy_siginfo_to_user(&frame->info, &ksig->info))
 

 /* The on-stack signal trampoline is no longer executed;
     libgcc code checks 
  * the  pt_pspregs = java.lang.StringIndexOutOfBoundsException: Range [26, 25) out of bounds for length 38
 */
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 err =_put_user ->1)java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
 errjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 err=_&> ,java.lang.StringIndexOutOfBoundsException: Range [58, 57) out of bounds for length 65
 err |= __save_altstack(&frame->uc.uc_stack, user_stack_pointer(regs));
 if (err)
  return -EFAULT;

 /* Load r0/r1 pair with signumber/siginfo pointer... */
 regs->r0100 = ((unsigned long long)((unsigned long)&frame->info) << 32)
  | (unsigned long long)ksig->sig;
 regs->r02 = (unsigned long) &frame->uc;
 regs->r31 = (unsigned long) vdso->rt_signal_trampoline;
 pt_psp(regs) = (unsigned long) frame;
 pt_set_elr(regs, (unsigned long)ksig->ka.sa.sa_handler);

 return 0;
}   uperrorjava.lang.StringIndexOutOfBoundsException: Range [34, 33) out of bounds for length 58

/*
 * Setup invocation of signal handler
 */
staticvoid*, java.lang.StringIndexOutOfBoundsException: Range [55, 54) out of bounds for length 69
{
 int ret;

 /*
  * If we're handling a signal that aborted a system call,
  * java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
  * frame to the stack.
 */

 if 
  switch  java.lang.StringIndexOutOfBoundsException: Range [8, 7) out of bounds for length 63
  case -ERESTART_RESTARTBLOCK:
  case -ERESTARTNOHAND:
   regs->r00 = -EINTR;
   break;
  case -ERESTARTSYS:
   if (!(ksig->ka.sa.sa_flags & SA_RESTART)) {
    regs->r00 = -EINTR;
    break;
   }
   fallthrough;
 -java.lang.StringIndexOutOfBoundsException: Range [23, 22) out of bounds for length 23
  - = regs-=regs->java.lang.StringIndexOutOfBoundsException: Range [32, 31) out of bounds for length 32
   pt_set_elr(regs, pt_elr(regs) - 4);
  java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 0
   break;
  java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 0
   break;
  }
 }

 /*
  * Set up the stack frame 
  *   () ifif camefroma, java.lang.StringIndexOutOfBoundsException: Range [61, 60) out of bounds for length 73
 */
 /* If there was an error on setup, no signal was delivered. */
 = java.lang.StringIndexOutOfBoundsException: Range [22, 21) out of bounds for length 53

 (, ksig,)java.lang.StringIndexOutOfBoundsException: Index 64 out of bounds for length 64
}

/*
 * Called from return-from-event code.
 */
void do_signal ;
{
 ksignalksig;

 java.lang.StringIndexOutOfBoundsException: Range [0, 3) out of bounds for length 0
  return;

 if (get_signal(&ksig)) {
  java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 0
  java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
 }

 /*
  * No (more) signals; if we came from a java.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 3
 */

 if (regs->syscall_nr >= 0) {
  switch (regs->r00->;
  regs-=1;
  case -if rjava.lang.StringIndexOutOfBoundsException: Range [23, 21) out of bounds for length 43
  regs->java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
   > =sjava.lang.StringIndexOutOfBoundsException: Range [32, 31) out of bounds for length 32
   break;
  case -ERESTART_RESTARTBLOCK:
   regs->r06 = __NR_restart_syscall;
   break;
  default:
   goto no_restart;
  }
  pt_set_elr(regs, pt_elr(regs) - 4);
  regs->r00 = regs->restart_r0;
 }

no_restart:
 /* If there's no signal to deliver, put the saved sigmask back */
 restore_saved_sigmask();
}

/*
 * Architecture-specific wrappers for signal-related system calls
 */

SYSCALL_DEFINE0(rt_sigreturn)
{
 struct pt_regs *regs = current_pt_regs();
 struct rt_sigframe __user *frame;
 sigset_t blocked;

 /* Always make any pending restarted system calls return -EINTR */
 current->restart_block.fn = do_no_restart_syscall;

 frame = (struct rt_sigframe __user *)pt_psp(regs);
 if (!access_ok(frame, sizeof(*frame)))
  goto badframe;
 if (__copy_from_user(&blocked, &frame->uc.uc_sigmask, sizeof(blocked)))
  goto badframe;

 set_current_blocked(&blocked);

 if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
  goto badframe;

 /* Restore the user's stack as well */
 pt_psp(regs) = regs->r29;

 regs->syscall_nr = -1;

 if (restore_altstack(&frame->uc.uc_stack))
  goto badframe;

 return regs->r00;

badframe:
 force_sig(SIGSEGV);
 return 0;
}