forked from luck/tmp_suning_uos_patched
1a59d1b8e0
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
150 lines
3.8 KiB
C
150 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2003 Broadcom Corporation
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*/
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#include <linux/cache.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/smp.h>
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#include <linux/kernel.h>
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#include <linux/signal.h>
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#include <linux/errno.h>
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#include <linux/wait.h>
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#include <linux/ptrace.h>
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#include <linux/unistd.h>
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#include <linux/compat.h>
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#include <linux/bitops.h>
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#include <asm/abi.h>
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#include <asm/asm.h>
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#include <asm/cacheflush.h>
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#include <asm/compat-signal.h>
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#include <asm/sim.h>
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#include <linux/uaccess.h>
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#include <asm/ucontext.h>
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#include <asm/fpu.h>
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#include <asm/cpu-features.h>
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#include <asm/war.h>
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#include "signal-common.h"
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/*
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* Including <asm/unistd.h> would give use the 64-bit syscall numbers ...
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*/
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#define __NR_N32_restart_syscall 6214
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extern int setup_sigcontext(struct pt_regs *, struct sigcontext __user *);
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extern int restore_sigcontext(struct pt_regs *, struct sigcontext __user *);
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struct ucontextn32 {
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u32 uc_flags;
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s32 uc_link;
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compat_stack_t uc_stack;
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struct sigcontext uc_mcontext;
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compat_sigset_t uc_sigmask; /* mask last for extensibility */
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};
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struct rt_sigframe_n32 {
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u32 rs_ass[4]; /* argument save space for o32 */
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u32 rs_pad[2]; /* Was: signal trampoline */
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struct compat_siginfo rs_info;
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struct ucontextn32 rs_uc;
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};
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asmlinkage void sysn32_rt_sigreturn(void)
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{
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struct rt_sigframe_n32 __user *frame;
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struct pt_regs *regs;
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sigset_t set;
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int sig;
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regs = current_pt_regs();
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frame = (struct rt_sigframe_n32 __user *)regs->regs[29];
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if (!access_ok(frame, sizeof(*frame)))
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goto badframe;
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if (__copy_conv_sigset_from_user(&set, &frame->rs_uc.uc_sigmask))
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goto badframe;
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set_current_blocked(&set);
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sig = restore_sigcontext(regs, &frame->rs_uc.uc_mcontext);
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if (sig < 0)
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goto badframe;
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else if (sig)
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force_sig(sig, current);
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if (compat_restore_altstack(&frame->rs_uc.uc_stack))
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goto badframe;
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/*
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* Don't let your children do this ...
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*/
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__asm__ __volatile__(
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"move\t$29, %0\n\t"
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"j\tsyscall_exit"
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: /* no outputs */
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: "r" (regs));
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/* Unreached */
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badframe:
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force_sig(SIGSEGV, current);
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}
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static int setup_rt_frame_n32(void *sig_return, struct ksignal *ksig,
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struct pt_regs *regs, sigset_t *set)
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{
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struct rt_sigframe_n32 __user *frame;
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int err = 0;
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frame = get_sigframe(ksig, regs, sizeof(*frame));
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if (!access_ok(frame, sizeof (*frame)))
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return -EFAULT;
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/* Create siginfo. */
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err |= copy_siginfo_to_user32(&frame->rs_info, &ksig->info);
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/* Create the ucontext. */
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err |= __put_user(0, &frame->rs_uc.uc_flags);
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err |= __put_user(0, &frame->rs_uc.uc_link);
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err |= __compat_save_altstack(&frame->rs_uc.uc_stack, regs->regs[29]);
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err |= setup_sigcontext(regs, &frame->rs_uc.uc_mcontext);
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err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set);
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if (err)
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return -EFAULT;
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/*
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* Arguments to signal handler:
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*
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* a0 = signal number
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* a1 = 0 (should be cause)
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* a2 = pointer to ucontext
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*
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* $25 and c0_epc point to the signal handler, $29 points to
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* the struct rt_sigframe.
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*/
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regs->regs[ 4] = ksig->sig;
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regs->regs[ 5] = (unsigned long) &frame->rs_info;
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regs->regs[ 6] = (unsigned long) &frame->rs_uc;
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regs->regs[29] = (unsigned long) frame;
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regs->regs[31] = (unsigned long) sig_return;
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regs->cp0_epc = regs->regs[25] = (unsigned long) ksig->ka.sa.sa_handler;
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DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
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current->comm, current->pid,
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frame, regs->cp0_epc, regs->regs[31]);
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return 0;
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}
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struct mips_abi mips_abi_n32 = {
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.setup_rt_frame = setup_rt_frame_n32,
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.restart = __NR_N32_restart_syscall,
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.off_sc_fpregs = offsetof(struct sigcontext, sc_fpregs),
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.off_sc_fpc_csr = offsetof(struct sigcontext, sc_fpc_csr),
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.off_sc_used_math = offsetof(struct sigcontext, sc_used_math),
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.vdso = &vdso_image_n32,
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};
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