/*
* Copyright (C) 2003 PathScale, Inc.
+ * Copyright (C) 2003 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* 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 <linux/personality.h>
+#include <linux/ptrace.h>
+#include <asm/unistd.h>
+#include <asm/uaccess.h>
+#include <asm/ucontext.h>
#include "frame_kern.h"
-
-#ifdef CONFIG_MODE_SKAS
-
#include "skas.h"
-void copy_sc(union uml_pt_regs *regs, void *from)
+void copy_sc(struct uml_pt_regs *regs, void *from)
{
struct sigcontext *sc = from;
-#define GETREG(regs, regno, sc, regname) \
- (regs)->skas.regs[(regno) / sizeof(unsigned long)] = (sc)->regname
-
- GETREG(regs, R8, sc, r8);
- GETREG(regs, R9, sc, r9);
- GETREG(regs, R10, sc, r10);
- GETREG(regs, R11, sc, r11);
- GETREG(regs, R12, sc, r12);
- GETREG(regs, R13, sc, r13);
- GETREG(regs, R14, sc, r14);
- GETREG(regs, R15, sc, r15);
- GETREG(regs, RDI, sc, rdi);
- GETREG(regs, RSI, sc, rsi);
- GETREG(regs, RBP, sc, rbp);
- GETREG(regs, RBX, sc, rbx);
- GETREG(regs, RDX, sc, rdx);
- GETREG(regs, RAX, sc, rax);
- GETREG(regs, RCX, sc, rcx);
- GETREG(regs, RSP, sc, rsp);
- GETREG(regs, RIP, sc, rip);
- GETREG(regs, EFLAGS, sc, eflags);
- GETREG(regs, CS, sc, cs);
+#define GETREG(regs, regno, sc, regname) \
+ (regs)->gp[(regno) / sizeof(unsigned long)] = (sc)->regname
+
+ GETREG(regs, R8, sc, r8);
+ GETREG(regs, R9, sc, r9);
+ GETREG(regs, R10, sc, r10);
+ GETREG(regs, R11, sc, r11);
+ GETREG(regs, R12, sc, r12);
+ GETREG(regs, R13, sc, r13);
+ GETREG(regs, R14, sc, r14);
+ GETREG(regs, R15, sc, r15);
+ GETREG(regs, RDI, sc, di);
+ GETREG(regs, RSI, sc, si);
+ GETREG(regs, RBP, sc, bp);
+ GETREG(regs, RBX, sc, bx);
+ GETREG(regs, RDX, sc, dx);
+ GETREG(regs, RAX, sc, ax);
+ GETREG(regs, RCX, sc, cx);
+ GETREG(regs, RSP, sc, sp);
+ GETREG(regs, RIP, sc, ip);
+ GETREG(regs, EFLAGS, sc, flags);
+ GETREG(regs, CS, sc, cs);
#undef GETREG
}
-static int copy_sc_from_user_skas(struct pt_regs *regs,
- struct sigcontext __user *from)
+static int copy_sc_from_user(struct pt_regs *regs,
+ struct sigcontext __user *from,
+ struct _fpstate __user *fpp)
{
- 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);
+ struct user_i387_struct fp;
+ int err = 0;
+
+#define GETREG(regs, regno, sc, regname) \
+ __get_user((regs)->regs.gp[(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, di);
+ err |= GETREG(regs, RSI, from, si);
+ err |= GETREG(regs, RBP, from, bp);
+ err |= GETREG(regs, RBX, from, bx);
+ err |= GETREG(regs, RDX, from, dx);
+ err |= GETREG(regs, RAX, from, ax);
+ err |= GETREG(regs, RCX, from, cx);
+ err |= GETREG(regs, RSP, from, sp);
+ err |= GETREG(regs, RIP, from, ip);
+ err |= GETREG(regs, EFLAGS, from, flags);
+ err |= GETREG(regs, CS, from, cs);
+ if (err)
+ return 1;
#undef GETREG
- return err;
+ err = copy_from_user(&fp, fpp, sizeof(struct user_i387_struct));
+ if (err)
+ return 1;
+
+ err = restore_fp_registers(userspace_pid[current_thread->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;
}
-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)
+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 = ¤t->thread.arch.faultinfo;
+ struct faultinfo * fi = ¤t->thread.arch.faultinfo;
+ struct user_i387_struct fp;
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);
+#define PUTREG(regs, regno, sc, regname) \
+ __put_user((regs)->regs.gp[(regno) / sizeof(unsigned long)], \
+ &(sc)->regname)
+
+ err |= PUTREG(regs, RDI, to, di);
+ err |= PUTREG(regs, RSI, to, si);
+ err |= PUTREG(regs, RBP, to, bp);
+ /*
+ * 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->sp);
+ err |= PUTREG(regs, RBX, to, bx);
+ err |= PUTREG(regs, RDX, to, dx);
+ err |= PUTREG(regs, RCX, to, cx);
+ err |= PUTREG(regs, RAX, to, ax);
err |= PUTREG(regs, R8, to, r8);
err |= PUTREG(regs, R9, to, r9);
err |= PUTREG(regs, R10, to, r10);
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 |= __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);
+ err |= PUTREG(regs, RIP, to, ip);
+ err |= PUTREG(regs, EFLAGS, to, flags);
#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);
+ if (err)
+ return 1;
+
+ err = save_fp_registers(userspace_pid[current_thread->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 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);
-}
+ if (copy_to_user(to_fp, &fp, sizeof(struct user_i387_struct)))
+ return 1;
-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)));
+ return err;
}
struct rt_sigframe
{
- char __user *pretcode;
- struct ucontext uc;
- struct siginfo info;
+ char __user *pretcode;
+ struct ucontext uc;
+ struct siginfo info;
+ struct _fpstate fpstate;
};
#define round_down(m, n) (((m) / (n)) * (n))
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);
/* 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, fp, sizeof(struct _fpstate)))
- goto out;
+ frame = (struct rt_sigframe __user *) ((unsigned long) frame - 128 - 8);
-#if 0 /* XXX */
- if (save_i387(fp) < 0)
- err |= -1;
-#endif
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
goto out;
goto out;
}
- /* Update SP now because the page fault handler refuses to extend
+ /*
+ * 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.
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);
+ 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]);
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. */
+ /*
+ * 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);
/* 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. */
+ /*
+ * 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;
struct ucontext __user *uc = &frame->uc;
sigset_t set;
- if(copy_from_user(&set, &uc->uc_sigmask, sizeof(set)))
+ if (copy_from_user(&set, &uc->uc_sigmask, sizeof(set)))
goto segfault;
sigdelsetmask(&set, ~_BLOCKABLE);
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
- if(copy_sc_from_user(¤t->thread.regs, &uc->uc_mcontext))
+ if (copy_sc_from_user(¤t->thread.regs, &uc->uc_mcontext,
+ &frame->fpstate))
goto segfault;
/* Avoid ERESTART handling */
PT_REGS_SYSCALL_NR(¤t->thread.regs) = -1;
- return(PT_REGS_SYSCALL_RET(¤t->thread.regs));
+ return PT_REGS_SYSCALL_RET(¤t->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:
- */
git.samba.org / sfrench / cifs-2.6.git / blobdiff