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Diffstat (limited to 'arch/um/sys-x86_64/signal.c')
-rw-r--r--arch/um/sys-x86_64/signal.c315
1 files changed, 0 insertions, 315 deletions
diff --git a/arch/um/sys-x86_64/signal.c b/arch/um/sys-x86_64/signal.c
deleted file mode 100644
index 9edf114faf7..00000000000
--- a/arch/um/sys-x86_64/signal.c
+++ /dev/null
@@ -1,315 +0,0 @@
-/*
- * Copyright (C) 2003 PathScale, Inc.
- * Licensed under the GPL
- */
-
-#include "linux/stddef.h"
-#include "linux/errno.h"
-#include "linux/personality.h"
-#include "linux/ptrace.h"
-#include "asm/current.h"
-#include "asm/uaccess.h"
-#include "asm/sigcontext.h"
-#include "asm/ptrace.h"
-#include "asm/arch/ucontext.h"
-#include "choose-mode.h"
-#include "sysdep/ptrace.h"
-#include "frame_kern.h"
-
-#ifdef CONFIG_MODE_SKAS
-
-#include "skas.h"
-
-static int copy_sc_from_user_skas(struct pt_regs *regs,
- struct sigcontext __user *from)
-{
- int err = 0;
-
-#define GETREG(regs, regno, sc, regname) \
- __get_user((regs)->regs.skas.regs[(regno) / sizeof(unsigned long)], \
- &(sc)->regname)
-
- err |= GETREG(regs, R8, from, r8);
- err |= GETREG(regs, R9, from, r9);
- err |= GETREG(regs, R10, from, r10);
- err |= GETREG(regs, R11, from, r11);
- err |= GETREG(regs, R12, from, r12);
- err |= GETREG(regs, R13, from, r13);
- err |= GETREG(regs, R14, from, r14);
- err |= GETREG(regs, R15, from, r15);
- err |= GETREG(regs, RDI, from, rdi);
- err |= GETREG(regs, RSI, from, rsi);
- err |= GETREG(regs, RBP, from, rbp);
- err |= GETREG(regs, RBX, from, rbx);
- err |= GETREG(regs, RDX, from, rdx);
- err |= GETREG(regs, RAX, from, rax);
- err |= GETREG(regs, RCX, from, rcx);
- err |= GETREG(regs, RSP, from, rsp);
- err |= GETREG(regs, RIP, from, rip);
- err |= GETREG(regs, EFLAGS, from, eflags);
- err |= GETREG(regs, CS, from, cs);
-
-#undef GETREG
-
- return(err);
-}
-
-int copy_sc_to_user_skas(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;
- int err = 0;
-
- err |= __put_user(0, &to->gs);
- err |= __put_user(0, &to->fs);
-
-#define PUTREG(regs, regno, sc, regname) \
- __put_user((regs)->regs.skas.regs[(regno) / sizeof(unsigned long)], \
- &(sc)->regname)
-
- err |= PUTREG(regs, RDI, to, rdi);
- err |= PUTREG(regs, RSI, to, rsi);
- err |= PUTREG(regs, RBP, to, rbp);
- /* Must use orignal RSP, which is passed in, rather than what's in
- * the pt_regs, because that's already been updated to point at the
- * signal frame.
- */
- err |= __put_user(sp, &to->rsp);
- err |= PUTREG(regs, RBX, to, rbx);
- err |= PUTREG(regs, RDX, to, rdx);
- err |= PUTREG(regs, RCX, to, rcx);
- err |= PUTREG(regs, RAX, to, rax);
- err |= PUTREG(regs, R8, to, r8);
- err |= PUTREG(regs, R9, to, r9);
- err |= PUTREG(regs, R10, to, r10);
- err |= PUTREG(regs, R11, to, r11);
- err |= PUTREG(regs, R12, to, r12);
- err |= PUTREG(regs, R13, to, r13);
- err |= PUTREG(regs, R14, to, r14);
- err |= PUTREG(regs, R15, to, r15);
- err |= PUTREG(regs, CS, to, cs); /* XXX x86_64 doesn't do this */
-
- err |= __put_user(fi->cr2, &to->cr2);
- err |= __put_user(fi->error_code, &to->err);
- err |= __put_user(fi->trap_no, &to->trapno);
-
- err |= PUTREG(regs, RIP, to, rip);
- err |= PUTREG(regs, EFLAGS, to, eflags);
-#undef PUTREG
-
- err |= __put_user(mask, &to->oldmask);
-
- return(err);
-}
-
-#endif
-
-#ifdef CONFIG_MODE_TT
-int copy_sc_from_user_tt(struct sigcontext *to, struct sigcontext __user *from,
- int fpsize)
-{
- struct _fpstate *to_fp;
- struct _fpstate __user *from_fp;
- unsigned long sigs;
- int err;
-
- to_fp = to->fpstate;
- sigs = to->oldmask;
- err = copy_from_user(to, from, sizeof(*to));
- from_fp = to->fpstate;
- to->fpstate = to_fp;
- to->oldmask = sigs;
- if(to_fp != NULL)
- err |= copy_from_user(to_fp, from_fp, fpsize);
- return(err);
-}
-
-int copy_sc_to_user_tt(struct sigcontext __user *to, struct _fpstate __user *fp,
- struct sigcontext *from, int fpsize, unsigned long sp)
-{
- struct _fpstate __user *to_fp;
- struct _fpstate *from_fp;
- int err;
-
- to_fp = (fp ? fp : (struct _fpstate __user *) (to + 1));
- from_fp = from->fpstate;
- err = copy_to_user(to, from, sizeof(*to));
- /* The SP in the sigcontext is the updated one for the signal
- * delivery. The sp passed in is the original, and this needs
- * to be restored, so we stick it in separately.
- */
- err |= copy_to_user(&SC_SP(to), &sp, sizeof(sp));
-
- if(from_fp != NULL){
- err |= copy_to_user(&to->fpstate, &to_fp, sizeof(to->fpstate));
- err |= copy_to_user(to_fp, from_fp, fpsize);
- }
- return err;
-}
-
-#endif
-
-static int copy_sc_from_user(struct pt_regs *to, void __user *from)
-{
- int ret;
-
- ret = CHOOSE_MODE(copy_sc_from_user_tt(UPT_SC(&to->regs), from,
- sizeof(struct _fpstate)),
- copy_sc_from_user_skas(to, from));
- return(ret);
-}
-
-static int copy_sc_to_user(struct sigcontext __user *to,
- struct _fpstate __user *fp,
- struct pt_regs *from, unsigned long mask,
- unsigned long sp)
-{
- return(CHOOSE_MODE(copy_sc_to_user_tt(to, fp, UPT_SC(&from->regs),
- sizeof(*fp), sp),
- copy_sc_to_user_skas(to, fp, from, mask, sp)));
-}
-
-struct rt_sigframe
-{
- char __user *pretcode;
- struct ucontext uc;
- struct siginfo info;
-};
-
-#define round_down(m, n) (((m) / (n)) * (n))
-
-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;
- struct _fpstate __user *fp = NULL;
- 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) - 8;
- frame = (struct rt_sigframe __user *) ((unsigned long) frame - 128);
-
- if (!access_ok(VERIFY_WRITE, fp, sizeof(struct _fpstate)))
- goto out;
-
-#if 0 /* XXX */
- if (save_i387(fp) < 0)
- err |= -1;
-#endif
- 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, fp, regs, set->sig[0],
- save_sp);
- err |= __put_user(fp, &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);
-
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
-
- 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;
-}
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
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