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Diffstat (limited to 'arch/um/sys-x86_64/signal.c')
-rw-r--r--arch/um/sys-x86_64/signal.c255
1 files changed, 0 insertions, 255 deletions
diff --git a/arch/um/sys-x86_64/signal.c b/arch/um/sys-x86_64/signal.c
deleted file mode 100644
index 255b2ca0ce67..000000000000
--- a/arch/um/sys-x86_64/signal.c
+++ /dev/null
@@ -1,255 +0,0 @@
-/*
- * Copyright (C) 2003 PathScale, Inc.
- * Copyright (C) 2003 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
- */
-
-#include <linux/personality.h>
-#include <linux/ptrace.h>
-#include <linux/kernel.h>
-#include <asm/unistd.h>
-#include <asm/uaccess.h>
-#include <asm/ucontext.h>
-#include "frame_kern.h"
-#include "skas.h"
-
-static int copy_sc_from_user(struct pt_regs *regs,
- struct sigcontext __user *from)
-{
- struct sigcontext sc;
- struct user_i387_struct fp;
- void __user *buf;
- int err;
-
- err = copy_from_user(&sc, from, sizeof(sc));
- if (err)
- return err;
-
-#define GETREG(regno, regname) regs->regs.gp[HOST_##regno] = sc.regname
-
- GETREG(R8, r8);
- GETREG(R9, r9);
- GETREG(R10, r10);
- GETREG(R11, r11);
- GETREG(R12, r12);
- GETREG(R13, r13);
- GETREG(R14, r14);
- GETREG(R15, r15);
- GETREG(RDI, di);
- GETREG(RSI, si);
- GETREG(RBP, bp);
- GETREG(RBX, bx);
- GETREG(RDX, dx);
- GETREG(RAX, ax);
- GETREG(RCX, cx);
- GETREG(SP, sp);
- GETREG(IP, ip);
- GETREG(EFLAGS, flags);
- GETREG(CS, cs);
-#undef GETREG
-
- buf = sc.fpstate;
-
- err = copy_from_user(&fp, buf, sizeof(struct user_i387_struct));
- if (err)
- return 1;
-
- err = restore_fp_registers(userspace_pid[current_thread_info()->cpu],
- (unsigned long *) &fp);
- if (err < 0) {
- printk(KERN_ERR "copy_sc_from_user - "
- "restore_fp_registers failed, errno = %d\n",
- -err);
- return 1;
- }
-
- return 0;
-}
-
-static int copy_sc_to_user(struct sigcontext __user *to,
- struct _fpstate __user *to_fp, struct pt_regs *regs,
- unsigned long mask, unsigned long sp)
-{
- struct faultinfo * fi = &current->thread.arch.faultinfo;
- struct sigcontext sc;
- struct user_i387_struct fp;
- int err = 0;
- memset(&sc, 0, sizeof(struct sigcontext));
-
-#define PUTREG(regno, regname) sc.regname = regs->regs.gp[HOST_##regno]
-
- PUTREG(RDI, di);
- PUTREG(RSI, si);
- PUTREG(RBP, bp);
- /*
- * Must use original RSP, which is passed in, rather than what's in
- * signal frame.
- */
- sc.sp = sp;
- PUTREG(RBX, bx);
- PUTREG(RDX, dx);
- PUTREG(RCX, cx);
- PUTREG(RAX, ax);
- PUTREG(R8, r8);
- PUTREG(R9, r9);
- PUTREG(R10, r10);
- PUTREG(R11, r11);
- PUTREG(R12, r12);
- PUTREG(R13, r13);
- PUTREG(R14, r14);
- PUTREG(R15, r15);
- PUTREG(CS, cs); /* XXX x86_64 doesn't do this */
-
- sc.cr2 = fi->cr2;
- sc.err = fi->error_code;
- sc.trapno = fi->trap_no;
-
- PUTREG(IP, ip);
- PUTREG(EFLAGS, flags);
-#undef PUTREG
-
- sc.oldmask = mask;
-
- err = copy_to_user(to, &sc, sizeof(struct sigcontext));
- if (err)
- return 1;
-
- err = save_fp_registers(userspace_pid[current_thread_info()->cpu],
- (unsigned long *) &fp);
- if (err < 0) {
- printk(KERN_ERR "copy_sc_from_user - restore_fp_registers "
- "failed, errno = %d\n", -err);
- return 1;
- }
-
- if (copy_to_user(to_fp, &fp, sizeof(struct user_i387_struct)))
- return 1;
-
- return err;
-}
-
-struct rt_sigframe
-{
- char __user *pretcode;
- struct ucontext uc;
- struct siginfo info;
- struct _fpstate fpstate;
-};
-
-int setup_signal_stack_si(unsigned long stack_top, int sig,
- struct k_sigaction *ka, struct pt_regs * regs,
- siginfo_t *info, sigset_t *set)
-{
- struct rt_sigframe __user *frame;
- unsigned long save_sp = PT_REGS_RSP(regs);
- int err = 0;
- struct task_struct *me = current;
-
- frame = (struct rt_sigframe __user *)
- round_down(stack_top - sizeof(struct rt_sigframe), 16);
- /* Subtract 128 for a red zone and 8 for proper alignment */
- frame = (struct rt_sigframe __user *) ((unsigned long) frame - 128 - 8);
-
- if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
- goto out;
-
- if (ka->sa.sa_flags & SA_SIGINFO) {
- err |= copy_siginfo_to_user(&frame->info, info);
- if (err)
- goto out;
- }
-
- /*
- * Update SP now because the page fault handler refuses to extend
- * the stack if the faulting address is too far below the current
- * SP, which frame now certainly is. If there's an error, the original
- * value is restored on the way out.
- * When writing the sigcontext to the stack, we have to write the
- * original value, so that's passed to copy_sc_to_user, which does
- * the right thing with it.
- */
- PT_REGS_RSP(regs) = (unsigned long) frame;
-
- /* Create the ucontext. */
- err |= __put_user(0, &frame->uc.uc_flags);
- err |= __put_user(0, &frame->uc.uc_link);
- err |= __put_user(me->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
- err |= __put_user(sas_ss_flags(save_sp),
- &frame->uc.uc_stack.ss_flags);
- err |= __put_user(me->sas_ss_size, &frame->uc.uc_stack.ss_size);
- err |= copy_sc_to_user(&frame->uc.uc_mcontext, &frame->fpstate, regs,
- set->sig[0], save_sp);
- err |= __put_user(&frame->fpstate, &frame->uc.uc_mcontext.fpstate);
- if (sizeof(*set) == 16) {
- __put_user(set->sig[0], &frame->uc.uc_sigmask.sig[0]);
- __put_user(set->sig[1], &frame->uc.uc_sigmask.sig[1]);
- }
- else
- err |= __copy_to_user(&frame->uc.uc_sigmask, set,
- sizeof(*set));
-
- /*
- * Set up to return from userspace. If provided, use a stub
- * already in userspace.
- */
- /* x86-64 should always use SA_RESTORER. */
- if (ka->sa.sa_flags & SA_RESTORER)
- err |= __put_user(ka->sa.sa_restorer, &frame->pretcode);
- else
- /* could use a vstub here */
- goto restore_sp;
-
- if (err)
- goto restore_sp;
-
- /* Set up registers for signal handler */
- {
- struct exec_domain *ed = current_thread_info()->exec_domain;
- if (unlikely(ed && ed->signal_invmap && sig < 32))
- sig = ed->signal_invmap[sig];
- }
-
- PT_REGS_RDI(regs) = sig;
- /* In case the signal handler was declared without prototypes */
- PT_REGS_RAX(regs) = 0;
-
- /*
- * This also works for non SA_SIGINFO handlers because they expect the
- * next argument after the signal number on the stack.
- */
- PT_REGS_RSI(regs) = (unsigned long) &frame->info;
- PT_REGS_RDX(regs) = (unsigned long) &frame->uc;
- PT_REGS_RIP(regs) = (unsigned long) ka->sa.sa_handler;
- out:
- return err;
-
-restore_sp:
- PT_REGS_RSP(regs) = save_sp;
- return err;
-}
-
-long sys_rt_sigreturn(struct pt_regs *regs)
-{
- unsigned long sp = PT_REGS_SP(&current->thread.regs);
- struct rt_sigframe __user *frame =
- (struct rt_sigframe __user *)(sp - 8);
- struct ucontext __user *uc = &frame->uc;
- sigset_t set;
-
- if (copy_from_user(&set, &uc->uc_sigmask, sizeof(set)))
- goto segfault;
-
- sigdelsetmask(&set, ~_BLOCKABLE);
- set_current_blocked(&set);
-
- if (copy_sc_from_user(&current->thread.regs, &uc->uc_mcontext))
- goto segfault;
-
- /* Avoid ERESTART handling */
- PT_REGS_SYSCALL_NR(&current->thread.regs) = -1;
- return PT_REGS_SYSCALL_RET(&current->thread.regs);
-
- segfault:
- force_sig(SIGSEGV, current);
- return 0;
-}
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