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Diffstat (limited to 'arch/tile/kernel/compat_signal.c')
-rw-r--r--arch/tile/kernel/compat_signal.c172
1 files changed, 0 insertions, 172 deletions
diff --git a/arch/tile/kernel/compat_signal.c b/arch/tile/kernel/compat_signal.c
deleted file mode 100644
index a703bd0e0488..000000000000
--- a/arch/tile/kernel/compat_signal.c
+++ /dev/null
@@ -1,172 +0,0 @@
-/*
- * Copyright 2010 Tilera Corporation. All Rights Reserved.
- *
- * 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, version 2.
- *
- * 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, GOOD TITLE or
- * NON INFRINGEMENT. See the GNU General Public License for
- * more details.
- */
-
-#include <linux/sched.h>
-#include <linux/sched/task_stack.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/kernel.h>
-#include <linux/signal.h>
-#include <linux/errno.h>
-#include <linux/wait.h>
-#include <linux/unistd.h>
-#include <linux/stddef.h>
-#include <linux/personality.h>
-#include <linux/suspend.h>
-#include <linux/ptrace.h>
-#include <linux/elf.h>
-#include <linux/compat.h>
-#include <linux/syscalls.h>
-#include <linux/uaccess.h>
-#include <asm/processor.h>
-#include <asm/ucontext.h>
-#include <asm/sigframe.h>
-#include <asm/syscalls.h>
-#include <asm/vdso.h>
-#include <arch/interrupts.h>
-
-struct compat_ucontext {
- compat_ulong_t uc_flags;
- compat_uptr_t uc_link;
- struct compat_sigaltstack uc_stack;
- struct sigcontext uc_mcontext;
- sigset_t uc_sigmask; /* mask last for extensibility */
-};
-
-struct compat_rt_sigframe {
- unsigned char save_area[C_ABI_SAVE_AREA_SIZE]; /* caller save area */
- struct compat_siginfo info;
- struct compat_ucontext uc;
-};
-
-/* The assembly shim for this function arranges to ignore the return value. */
-long compat_sys_rt_sigreturn(void)
-{
- struct pt_regs *regs = current_pt_regs();
- struct compat_rt_sigframe __user *frame =
- (struct compat_rt_sigframe __user *) compat_ptr(regs->sp);
- sigset_t set;
-
- 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 (restore_sigcontext(regs, &frame->uc.uc_mcontext))
- goto badframe;
-
- if (compat_restore_altstack(&frame->uc.uc_stack))
- goto badframe;
-
- return 0;
-
-badframe:
- signal_fault("bad sigreturn frame", regs, frame, 0);
- return 0;
-}
-
-/*
- * Determine which stack to use..
- */
-static inline void __user *compat_get_sigframe(struct k_sigaction *ka,
- struct pt_regs *regs,
- size_t frame_size)
-{
- unsigned long sp;
-
- /* Default to using normal stack */
- sp = (unsigned long)compat_ptr(regs->sp);
-
- /*
- * If we are on the alternate signal stack and would overflow
- * it, don't. Return an always-bogus address instead so we
- * will die with SIGSEGV.
- */
- if (on_sig_stack(sp) && !likely(on_sig_stack(sp - frame_size)))
- return (void __user __force *)-1UL;
-
- /* This is the X/Open sanctioned signal stack switching. */
- if (ka->sa.sa_flags & SA_ONSTACK) {
- if (sas_ss_flags(sp) == 0)
- sp = current->sas_ss_sp + current->sas_ss_size;
- }
-
- sp -= frame_size;
- /*
- * Align the stack pointer according to the TILE ABI,
- * i.e. so that on function entry (sp & 15) == 0.
- */
- sp &= -16UL;
- return (void __user *) sp;
-}
-
-int compat_setup_rt_frame(struct ksignal *ksig, sigset_t *set,
- struct pt_regs *regs)
-{
- unsigned long restorer;
- struct compat_rt_sigframe __user *frame;
- int err = 0, sig = ksig->sig;
-
- frame = compat_get_sigframe(&ksig->ka, regs, sizeof(*frame));
-
- if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
- goto err;
-
- /* Always write at least the signal number for the stack backtracer. */
- if (ksig->ka.sa.sa_flags & SA_SIGINFO) {
- /* At sigreturn time, restore the callee-save registers too. */
- err |= copy_siginfo_to_user32(&frame->info, &ksig->info);
- regs->flags |= PT_FLAGS_RESTORE_REGS;
- } else {
- err |= __put_user(ksig->info.si_signo, &frame->info.si_signo);
- }
-
- /* Create the ucontext. */
- err |= __clear_user(&frame->save_area, sizeof(frame->save_area));
- err |= __put_user(0, &frame->uc.uc_flags);
- err |= __put_user(0, &frame->uc.uc_link);
- err |= __compat_save_altstack(&frame->uc.uc_stack, regs->sp);
- err |= setup_sigcontext(&frame->uc.uc_mcontext, regs);
- err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
- if (err)
- goto err;
-
- restorer = VDSO_SYM(&__vdso_rt_sigreturn);
- if (ksig->ka.sa.sa_flags & SA_RESTORER)
- restorer = ptr_to_compat_reg(ksig->ka.sa.sa_restorer);
-
- /*
- * Set up registers for signal handler.
- * Registers that we don't modify keep the value they had from
- * user-space at the time we took the signal.
- * We always pass siginfo and mcontext, regardless of SA_SIGINFO,
- * since some things rely on this (e.g. glibc's debug/segfault.c).
- */
- regs->pc = ptr_to_compat_reg(ksig->ka.sa.sa_handler);
- regs->ex1 = PL_ICS_EX1(USER_PL, 1); /* set crit sec in handler */
- regs->sp = ptr_to_compat_reg(frame);
- regs->lr = restorer;
- regs->regs[0] = (unsigned long) sig;
- regs->regs[1] = ptr_to_compat_reg(&frame->info);
- regs->regs[2] = ptr_to_compat_reg(&frame->uc);
- regs->flags |= PT_FLAGS_CALLER_SAVES;
- return 0;
-
-err:
- trace_unhandled_signal("bad sigreturn frame", regs,
- (unsigned long)frame, SIGSEGV);
- return -EFAULT;
-}