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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/ia64/ia32/ia32_signal.c
downloadlinux-stericsson-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/ia64/ia32/ia32_signal.c')
-rw-r--r--arch/ia64/ia32/ia32_signal.c1036
1 files changed, 1036 insertions, 0 deletions
diff --git a/arch/ia64/ia32/ia32_signal.c b/arch/ia64/ia32/ia32_signal.c
new file mode 100644
index 000000000000..19b02adce68c
--- /dev/null
+++ b/arch/ia64/ia32/ia32_signal.c
@@ -0,0 +1,1036 @@
+/*
+ * IA32 Architecture-specific signal handling support.
+ *
+ * Copyright (C) 1999, 2001-2002, 2005 Hewlett-Packard Co
+ * David Mosberger-Tang <davidm@hpl.hp.com>
+ * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com>
+ * Copyright (C) 2000 VA Linux Co
+ * Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
+ *
+ * Derived from i386 and Alpha versions.
+ */
+
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/personality.h>
+#include <linux/ptrace.h>
+#include <linux/sched.h>
+#include <linux/signal.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/stddef.h>
+#include <linux/syscalls.h>
+#include <linux/unistd.h>
+#include <linux/wait.h>
+#include <linux/compat.h>
+
+#include <asm/intrinsics.h>
+#include <asm/uaccess.h>
+#include <asm/rse.h>
+#include <asm/sigcontext.h>
+#include <asm/segment.h>
+
+#include "ia32priv.h"
+
+#include "../kernel/sigframe.h"
+
+#define A(__x) ((unsigned long)(__x))
+
+#define DEBUG_SIG 0
+#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
+
+#define __IA32_NR_sigreturn 119
+#define __IA32_NR_rt_sigreturn 173
+
+struct sigframe_ia32
+{
+ int pretcode;
+ int sig;
+ struct sigcontext_ia32 sc;
+ struct _fpstate_ia32 fpstate;
+ unsigned int extramask[_COMPAT_NSIG_WORDS-1];
+ char retcode[8];
+};
+
+struct rt_sigframe_ia32
+{
+ int pretcode;
+ int sig;
+ int pinfo;
+ int puc;
+ compat_siginfo_t info;
+ struct ucontext_ia32 uc;
+ struct _fpstate_ia32 fpstate;
+ char retcode[8];
+};
+
+int
+copy_siginfo_from_user32 (siginfo_t *to, compat_siginfo_t __user *from)
+{
+ unsigned long tmp;
+ int err;
+
+ if (!access_ok(VERIFY_READ, from, sizeof(compat_siginfo_t)))
+ return -EFAULT;
+
+ err = __get_user(to->si_signo, &from->si_signo);
+ err |= __get_user(to->si_errno, &from->si_errno);
+ err |= __get_user(to->si_code, &from->si_code);
+
+ if (to->si_code < 0)
+ err |= __copy_from_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE);
+ else {
+ switch (to->si_code >> 16) {
+ case __SI_CHLD >> 16:
+ err |= __get_user(to->si_utime, &from->si_utime);
+ err |= __get_user(to->si_stime, &from->si_stime);
+ err |= __get_user(to->si_status, &from->si_status);
+ default:
+ err |= __get_user(to->si_pid, &from->si_pid);
+ err |= __get_user(to->si_uid, &from->si_uid);
+ break;
+ case __SI_FAULT >> 16:
+ err |= __get_user(tmp, &from->si_addr);
+ to->si_addr = (void __user *) tmp;
+ break;
+ case __SI_POLL >> 16:
+ err |= __get_user(to->si_band, &from->si_band);
+ err |= __get_user(to->si_fd, &from->si_fd);
+ break;
+ case __SI_RT >> 16: /* This is not generated by the kernel as of now. */
+ case __SI_MESGQ >> 16:
+ err |= __get_user(to->si_pid, &from->si_pid);
+ err |= __get_user(to->si_uid, &from->si_uid);
+ err |= __get_user(to->si_int, &from->si_int);
+ break;
+ }
+ }
+ return err;
+}
+
+int
+copy_siginfo_to_user32 (compat_siginfo_t __user *to, siginfo_t *from)
+{
+ unsigned int addr;
+ int err;
+
+ if (!access_ok(VERIFY_WRITE, to, sizeof(compat_siginfo_t)))
+ return -EFAULT;
+
+ /* If you change siginfo_t structure, please be sure
+ this code is fixed accordingly.
+ It should never copy any pad contained in the structure
+ to avoid security leaks, but must copy the generic
+ 3 ints plus the relevant union member.
+ This routine must convert siginfo from 64bit to 32bit as well
+ at the same time. */
+ err = __put_user(from->si_signo, &to->si_signo);
+ err |= __put_user(from->si_errno, &to->si_errno);
+ err |= __put_user((short)from->si_code, &to->si_code);
+ if (from->si_code < 0)
+ err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE);
+ else {
+ switch (from->si_code >> 16) {
+ case __SI_CHLD >> 16:
+ err |= __put_user(from->si_utime, &to->si_utime);
+ err |= __put_user(from->si_stime, &to->si_stime);
+ err |= __put_user(from->si_status, &to->si_status);
+ default:
+ err |= __put_user(from->si_pid, &to->si_pid);
+ err |= __put_user(from->si_uid, &to->si_uid);
+ break;
+ case __SI_FAULT >> 16:
+ /* avoid type-checking warnings by copying _pad[0] in lieu of si_addr... */
+ err |= __put_user(from->_sifields._pad[0], &to->si_addr);
+ break;
+ case __SI_POLL >> 16:
+ err |= __put_user(from->si_band, &to->si_band);
+ err |= __put_user(from->si_fd, &to->si_fd);
+ break;
+ case __SI_TIMER >> 16:
+ err |= __put_user(from->si_tid, &to->si_tid);
+ err |= __put_user(from->si_overrun, &to->si_overrun);
+ addr = (unsigned long) from->si_ptr;
+ err |= __put_user(addr, &to->si_ptr);
+ break;
+ case __SI_RT >> 16: /* Not generated by the kernel as of now. */
+ case __SI_MESGQ >> 16:
+ err |= __put_user(from->si_uid, &to->si_uid);
+ err |= __put_user(from->si_pid, &to->si_pid);
+ addr = (unsigned long) from->si_ptr;
+ err |= __put_user(addr, &to->si_ptr);
+ break;
+ }
+ }
+ return err;
+}
+
+
+/*
+ * SAVE and RESTORE of ia32 fpstate info, from ia64 current state
+ * Used in exception handler to pass the fpstate to the user, and restore
+ * the fpstate while returning from the exception handler.
+ *
+ * fpstate info and their mapping to IA64 regs:
+ * fpstate REG(BITS) Attribute Comments
+ * cw ar.fcr(0:12) with bits 7 and 6 not used
+ * sw ar.fsr(0:15)
+ * tag ar.fsr(16:31) with odd numbered bits not used
+ * (read returns 0, writes ignored)
+ * ipoff ar.fir(0:31)
+ * cssel ar.fir(32:47)
+ * dataoff ar.fdr(0:31)
+ * datasel ar.fdr(32:47)
+ *
+ * _st[(0+TOS)%8] f8
+ * _st[(1+TOS)%8] f9
+ * _st[(2+TOS)%8] f10
+ * _st[(3+TOS)%8] f11 (f8..f11 from ptregs)
+ * : : : (f12..f15 from live reg)
+ * : : :
+ * _st[(7+TOS)%8] f15 TOS=sw.top(bits11:13)
+ *
+ * status Same as sw RO
+ * magic 0 as X86_FXSR_MAGIC in ia32
+ * mxcsr Bits(7:15)=ar.fcr(39:47)
+ * Bits(0:5) =ar.fsr(32:37) with bit 6 reserved
+ * _xmm[0..7] f16..f31 (live registers)
+ * with _xmm[0]
+ * Bit(64:127)=f17(0:63)
+ * Bit(0:63)=f16(0:63)
+ * All other fields unused...
+ */
+
+static int
+save_ia32_fpstate_live (struct _fpstate_ia32 __user *save)
+{
+ struct task_struct *tsk = current;
+ struct pt_regs *ptp;
+ struct _fpreg_ia32 *fpregp;
+ char buf[32];
+ unsigned long fsr, fcr, fir, fdr;
+ unsigned long new_fsr;
+ unsigned long num128[2];
+ unsigned long mxcsr=0;
+ int fp_tos, fr8_st_map;
+
+ if (!access_ok(VERIFY_WRITE, save, sizeof(*save)))
+ return -EFAULT;
+
+ /* Read in fsr, fcr, fir, fdr and copy onto fpstate */
+ fsr = ia64_getreg(_IA64_REG_AR_FSR);
+ fcr = ia64_getreg(_IA64_REG_AR_FCR);
+ fir = ia64_getreg(_IA64_REG_AR_FIR);
+ fdr = ia64_getreg(_IA64_REG_AR_FDR);
+
+ /*
+ * We need to clear the exception state before calling the signal handler. Clear
+ * the bits 15, bits 0-7 in fp status word. Similar to the functionality of fnclex
+ * instruction.
+ */
+ new_fsr = fsr & ~0x80ff;
+ ia64_setreg(_IA64_REG_AR_FSR, new_fsr);
+
+ __put_user(fcr & 0xffff, &save->cw);
+ __put_user(fsr & 0xffff, &save->sw);
+ __put_user((fsr>>16) & 0xffff, &save->tag);
+ __put_user(fir, &save->ipoff);
+ __put_user((fir>>32) & 0xffff, &save->cssel);
+ __put_user(fdr, &save->dataoff);
+ __put_user((fdr>>32) & 0xffff, &save->datasel);
+ __put_user(fsr & 0xffff, &save->status);
+
+ mxcsr = ((fcr>>32) & 0xff80) | ((fsr>>32) & 0x3f);
+ __put_user(mxcsr & 0xffff, &save->mxcsr);
+ __put_user( 0, &save->magic); //#define X86_FXSR_MAGIC 0x0000
+
+ /*
+ * save f8..f11 from pt_regs
+ * save f12..f15 from live register set
+ */
+ /*
+ * Find the location where f8 has to go in fp reg stack. This depends on
+ * TOP(11:13) field of sw. Other f reg continue sequentially from where f8 maps
+ * to.
+ */
+ fp_tos = (fsr>>11)&0x7;
+ fr8_st_map = (8-fp_tos)&0x7;
+ ptp = ia64_task_regs(tsk);
+ fpregp = (struct _fpreg_ia32 *)(((unsigned long)buf + 15) & ~15);
+ ia64f2ia32f(fpregp, &ptp->f8);
+ copy_to_user(&save->_st[(0+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
+ ia64f2ia32f(fpregp, &ptp->f9);
+ copy_to_user(&save->_st[(1+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
+ ia64f2ia32f(fpregp, &ptp->f10);
+ copy_to_user(&save->_st[(2+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
+ ia64f2ia32f(fpregp, &ptp->f11);
+ copy_to_user(&save->_st[(3+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
+
+ ia64_stfe(fpregp, 12);
+ copy_to_user(&save->_st[(4+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
+ ia64_stfe(fpregp, 13);
+ copy_to_user(&save->_st[(5+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
+ ia64_stfe(fpregp, 14);
+ copy_to_user(&save->_st[(6+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
+ ia64_stfe(fpregp, 15);
+ copy_to_user(&save->_st[(7+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
+
+ ia64_stf8(&num128[0], 16);
+ ia64_stf8(&num128[1], 17);
+ copy_to_user(&save->_xmm[0], num128, sizeof(struct _xmmreg_ia32));
+
+ ia64_stf8(&num128[0], 18);
+ ia64_stf8(&num128[1], 19);
+ copy_to_user(&save->_xmm[1], num128, sizeof(struct _xmmreg_ia32));
+
+ ia64_stf8(&num128[0], 20);
+ ia64_stf8(&num128[1], 21);
+ copy_to_user(&save->_xmm[2], num128, sizeof(struct _xmmreg_ia32));
+
+ ia64_stf8(&num128[0], 22);
+ ia64_stf8(&num128[1], 23);
+ copy_to_user(&save->_xmm[3], num128, sizeof(struct _xmmreg_ia32));
+
+ ia64_stf8(&num128[0], 24);
+ ia64_stf8(&num128[1], 25);
+ copy_to_user(&save->_xmm[4], num128, sizeof(struct _xmmreg_ia32));
+
+ ia64_stf8(&num128[0], 26);
+ ia64_stf8(&num128[1], 27);
+ copy_to_user(&save->_xmm[5], num128, sizeof(struct _xmmreg_ia32));
+
+ ia64_stf8(&num128[0], 28);
+ ia64_stf8(&num128[1], 29);
+ copy_to_user(&save->_xmm[6], num128, sizeof(struct _xmmreg_ia32));
+
+ ia64_stf8(&num128[0], 30);
+ ia64_stf8(&num128[1], 31);
+ copy_to_user(&save->_xmm[7], num128, sizeof(struct _xmmreg_ia32));
+ return 0;
+}
+
+static int
+restore_ia32_fpstate_live (struct _fpstate_ia32 __user *save)
+{
+ struct task_struct *tsk = current;
+ struct pt_regs *ptp;
+ unsigned int lo, hi;
+ unsigned long num128[2];
+ unsigned long num64, mxcsr;
+ struct _fpreg_ia32 *fpregp;
+ char buf[32];
+ unsigned long fsr, fcr, fir, fdr;
+ int fp_tos, fr8_st_map;
+
+ if (!access_ok(VERIFY_READ, save, sizeof(*save)))
+ return(-EFAULT);
+
+ /*
+ * Updating fsr, fcr, fir, fdr.
+ * Just a bit more complicated than save.
+ * - Need to make sure that we don't write any value other than the
+ * specific fpstate info
+ * - Need to make sure that the untouched part of frs, fdr, fir, fcr
+ * should remain same while writing.
+ * So, we do a read, change specific fields and write.
+ */
+ fsr = ia64_getreg(_IA64_REG_AR_FSR);
+ fcr = ia64_getreg(_IA64_REG_AR_FCR);
+ fir = ia64_getreg(_IA64_REG_AR_FIR);
+ fdr = ia64_getreg(_IA64_REG_AR_FDR);
+
+ __get_user(mxcsr, (unsigned int __user *)&save->mxcsr);
+ /* setting bits 0..5 8..12 with cw and 39..47 from mxcsr */
+ __get_user(lo, (unsigned int __user *)&save->cw);
+ num64 = mxcsr & 0xff10;
+ num64 = (num64 << 32) | (lo & 0x1f3f);
+ fcr = (fcr & (~0xff1000001f3fUL)) | num64;
+
+ /* setting bits 0..31 with sw and tag and 32..37 from mxcsr */
+ __get_user(lo, (unsigned int __user *)&save->sw);
+ /* set bits 15,7 (fsw.b, fsw.es) to reflect the current error status */
+ if ( !(lo & 0x7f) )
+ lo &= (~0x8080);
+ __get_user(hi, (unsigned int __user *)&save->tag);
+ num64 = mxcsr & 0x3f;
+ num64 = (num64 << 16) | (hi & 0xffff);
+ num64 = (num64 << 16) | (lo & 0xffff);
+ fsr = (fsr & (~0x3fffffffffUL)) | num64;
+
+ /* setting bits 0..47 with cssel and ipoff */
+ __get_user(lo, (unsigned int __user *)&save->ipoff);
+ __get_user(hi, (unsigned int __user *)&save->cssel);
+ num64 = hi & 0xffff;
+ num64 = (num64 << 32) | lo;
+ fir = (fir & (~0xffffffffffffUL)) | num64;
+
+ /* setting bits 0..47 with datasel and dataoff */
+ __get_user(lo, (unsigned int __user *)&save->dataoff);
+ __get_user(hi, (unsigned int __user *)&save->datasel);
+ num64 = hi & 0xffff;
+ num64 = (num64 << 32) | lo;
+ fdr = (fdr & (~0xffffffffffffUL)) | num64;
+
+ ia64_setreg(_IA64_REG_AR_FSR, fsr);
+ ia64_setreg(_IA64_REG_AR_FCR, fcr);
+ ia64_setreg(_IA64_REG_AR_FIR, fir);
+ ia64_setreg(_IA64_REG_AR_FDR, fdr);
+
+ /*
+ * restore f8..f11 onto pt_regs
+ * restore f12..f15 onto live registers
+ */
+ /*
+ * Find the location where f8 has to go in fp reg stack. This depends on
+ * TOP(11:13) field of sw. Other f reg continue sequentially from where f8 maps
+ * to.
+ */
+ fp_tos = (fsr>>11)&0x7;
+ fr8_st_map = (8-fp_tos)&0x7;
+ fpregp = (struct _fpreg_ia32 *)(((unsigned long)buf + 15) & ~15);
+
+ ptp = ia64_task_regs(tsk);
+ copy_from_user(fpregp, &save->_st[(0+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
+ ia32f2ia64f(&ptp->f8, fpregp);
+ copy_from_user(fpregp, &save->_st[(1+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
+ ia32f2ia64f(&ptp->f9, fpregp);
+ copy_from_user(fpregp, &save->_st[(2+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
+ ia32f2ia64f(&ptp->f10, fpregp);
+ copy_from_user(fpregp, &save->_st[(3+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
+ ia32f2ia64f(&ptp->f11, fpregp);
+
+ copy_from_user(fpregp, &save->_st[(4+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
+ ia64_ldfe(12, fpregp);
+ copy_from_user(fpregp, &save->_st[(5+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
+ ia64_ldfe(13, fpregp);
+ copy_from_user(fpregp, &save->_st[(6+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
+ ia64_ldfe(14, fpregp);
+ copy_from_user(fpregp, &save->_st[(7+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
+ ia64_ldfe(15, fpregp);
+
+ copy_from_user(num128, &save->_xmm[0], sizeof(struct _xmmreg_ia32));
+ ia64_ldf8(16, &num128[0]);
+ ia64_ldf8(17, &num128[1]);
+
+ copy_from_user(num128, &save->_xmm[1], sizeof(struct _xmmreg_ia32));
+ ia64_ldf8(18, &num128[0]);
+ ia64_ldf8(19, &num128[1]);
+
+ copy_from_user(num128, &save->_xmm[2], sizeof(struct _xmmreg_ia32));
+ ia64_ldf8(20, &num128[0]);
+ ia64_ldf8(21, &num128[1]);
+
+ copy_from_user(num128, &save->_xmm[3], sizeof(struct _xmmreg_ia32));
+ ia64_ldf8(22, &num128[0]);
+ ia64_ldf8(23, &num128[1]);
+
+ copy_from_user(num128, &save->_xmm[4], sizeof(struct _xmmreg_ia32));
+ ia64_ldf8(24, &num128[0]);
+ ia64_ldf8(25, &num128[1]);
+
+ copy_from_user(num128, &save->_xmm[5], sizeof(struct _xmmreg_ia32));
+ ia64_ldf8(26, &num128[0]);
+ ia64_ldf8(27, &num128[1]);
+
+ copy_from_user(num128, &save->_xmm[6], sizeof(struct _xmmreg_ia32));
+ ia64_ldf8(28, &num128[0]);
+ ia64_ldf8(29, &num128[1]);
+
+ copy_from_user(num128, &save->_xmm[7], sizeof(struct _xmmreg_ia32));
+ ia64_ldf8(30, &num128[0]);
+ ia64_ldf8(31, &num128[1]);
+ return 0;
+}
+
+static inline void
+sigact_set_handler (struct k_sigaction *sa, unsigned int handler, unsigned int restorer)
+{
+ if (handler + 1 <= 2)
+ /* SIG_DFL, SIG_IGN, or SIG_ERR: must sign-extend to 64-bits */
+ sa->sa.sa_handler = (__sighandler_t) A((int) handler);
+ else
+ sa->sa.sa_handler = (__sighandler_t) (((unsigned long) restorer << 32) | handler);
+}
+
+long
+__ia32_rt_sigsuspend (compat_sigset_t *sset, unsigned int sigsetsize, struct sigscratch *scr)
+{
+ extern long ia64_do_signal (sigset_t *oldset, struct sigscratch *scr, long in_syscall);
+ sigset_t oldset, set;
+
+ scr->scratch_unat = 0; /* avoid leaking kernel bits to user level */
+ memset(&set, 0, sizeof(&set));
+
+ if (memcpy(&set.sig, &sset->sig, sigsetsize))
+ return -EFAULT;
+
+ sigdelsetmask(&set, ~_BLOCKABLE);
+
+ spin_lock_irq(&current->sighand->siglock);
+ {
+ oldset = current->blocked;
+ current->blocked = set;
+ recalc_sigpending();
+ }
+ spin_unlock_irq(&current->sighand->siglock);
+
+ /*
+ * The return below usually returns to the signal handler. We need to pre-set the
+ * correct error code here to ensure that the right values get saved in sigcontext
+ * by ia64_do_signal.
+ */
+ scr->pt.r8 = -EINTR;
+ while (1) {
+ current->state = TASK_INTERRUPTIBLE;
+ schedule();
+ if (ia64_do_signal(&oldset, scr, 1))
+ return -EINTR;
+ }
+}
+
+asmlinkage long
+ia32_rt_sigsuspend (compat_sigset_t __user *uset, unsigned int sigsetsize, struct sigscratch *scr)
+{
+ compat_sigset_t set;
+
+ if (sigsetsize > sizeof(compat_sigset_t))
+ return -EINVAL;
+
+ if (copy_from_user(&set.sig, &uset->sig, sigsetsize))
+ return -EFAULT;
+
+ return __ia32_rt_sigsuspend(&set, sigsetsize, scr);
+}
+
+asmlinkage long
+ia32_sigsuspend (unsigned int mask, struct sigscratch *scr)
+{
+ return __ia32_rt_sigsuspend((compat_sigset_t *) &mask, sizeof(mask), scr);
+}
+
+asmlinkage long
+sys32_signal (int sig, unsigned int handler)
+{
+ struct k_sigaction new_sa, old_sa;
+ int ret;
+
+ sigact_set_handler(&new_sa, handler, 0);
+ new_sa.sa.sa_flags = SA_ONESHOT | SA_NOMASK;
+
+ ret = do_sigaction(sig, &new_sa, &old_sa);
+
+ return ret ? ret : IA32_SA_HANDLER(&old_sa);
+}
+
+asmlinkage long
+sys32_rt_sigaction (int sig, struct sigaction32 __user *act,
+ struct sigaction32 __user *oact, unsigned int sigsetsize)
+{
+ struct k_sigaction new_ka, old_ka;
+ unsigned int handler, restorer;
+ int ret;
+
+ /* XXX: Don't preclude handling different sized sigset_t's. */
+ if (sigsetsize != sizeof(compat_sigset_t))
+ return -EINVAL;
+
+ if (act) {
+ ret = get_user(handler, &act->sa_handler);
+ ret |= get_user(new_ka.sa.sa_flags, &act->sa_flags);
+ ret |= get_user(restorer, &act->sa_restorer);
+ ret |= copy_from_user(&new_ka.sa.sa_mask, &act->sa_mask, sizeof(compat_sigset_t));
+ if (ret)
+ return -EFAULT;
+
+ sigact_set_handler(&new_ka, handler, restorer);
+ }
+
+ ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
+
+ if (!ret && oact) {
+ ret = put_user(IA32_SA_HANDLER(&old_ka), &oact->sa_handler);
+ ret |= put_user(old_ka.sa.sa_flags, &oact->sa_flags);
+ ret |= put_user(IA32_SA_RESTORER(&old_ka), &oact->sa_restorer);
+ ret |= copy_to_user(&oact->sa_mask, &old_ka.sa.sa_mask, sizeof(compat_sigset_t));
+ }
+ return ret;
+}
+
+
+asmlinkage long
+sys32_rt_sigprocmask (int how, compat_sigset_t __user *set, compat_sigset_t __user *oset,
+ unsigned int sigsetsize)
+{
+ mm_segment_t old_fs = get_fs();
+ sigset_t s;
+ long ret;
+
+ if (sigsetsize > sizeof(s))
+ return -EINVAL;
+
+ if (set) {
+ memset(&s, 0, sizeof(s));
+ if (copy_from_user(&s.sig, set, sigsetsize))
+ return -EFAULT;
+ }
+ set_fs(KERNEL_DS);
+ ret = sys_rt_sigprocmask(how,
+ set ? (sigset_t __user *) &s : NULL,
+ oset ? (sigset_t __user *) &s : NULL, sizeof(s));
+ set_fs(old_fs);
+ if (ret)
+ return ret;
+ if (oset) {
+ if (copy_to_user(oset, &s.sig, sigsetsize))
+ return -EFAULT;
+ }
+ return 0;
+}
+
+asmlinkage long
+sys32_rt_sigqueueinfo (int pid, int sig, compat_siginfo_t __user *uinfo)
+{
+ mm_segment_t old_fs = get_fs();
+ siginfo_t info;
+ int ret;
+
+ if (copy_siginfo_from_user32(&info, uinfo))
+ return -EFAULT;
+ set_fs(KERNEL_DS);
+ ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
+ set_fs(old_fs);
+ return ret;
+}
+
+asmlinkage long
+sys32_sigaction (int sig, struct old_sigaction32 __user *act, struct old_sigaction32 __user *oact)
+{
+ struct k_sigaction new_ka, old_ka;
+ unsigned int handler, restorer;
+ int ret;
+
+ if (act) {
+ compat_old_sigset_t mask;
+
+ ret = get_user(handler, &act->sa_handler);
+ ret |= get_user(new_ka.sa.sa_flags, &act->sa_flags);
+ ret |= get_user(restorer, &act->sa_restorer);
+ ret |= get_user(mask, &act->sa_mask);
+ if (ret)
+ return ret;
+
+ sigact_set_handler(&new_ka, handler, restorer);
+ siginitset(&new_ka.sa.sa_mask, mask);
+ }
+
+ ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
+
+ if (!ret && oact) {
+ ret = put_user(IA32_SA_HANDLER(&old_ka), &oact->sa_handler);
+ ret |= put_user(old_ka.sa.sa_flags, &oact->sa_flags);
+ ret |= put_user(IA32_SA_RESTORER(&old_ka), &oact->sa_restorer);
+ ret |= put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
+ }
+
+ return ret;
+}
+
+static int
+setup_sigcontext_ia32 (struct sigcontext_ia32 __user *sc, struct _fpstate_ia32 __user *fpstate,
+ struct pt_regs *regs, unsigned long mask)
+{
+ int err = 0;
+ unsigned long flag;
+
+ if (!access_ok(VERIFY_WRITE, sc, sizeof(*sc)))
+ return -EFAULT;
+
+ err |= __put_user((regs->r16 >> 32) & 0xffff, (unsigned int __user *)&sc->fs);
+ err |= __put_user((regs->r16 >> 48) & 0xffff, (unsigned int __user *)&sc->gs);
+ err |= __put_user((regs->r16 >> 16) & 0xffff, (unsigned int __user *)&sc->es);
+ err |= __put_user(regs->r16 & 0xffff, (unsigned int __user *)&sc->ds);
+ err |= __put_user(regs->r15, &sc->edi);
+ err |= __put_user(regs->r14, &sc->esi);
+ err |= __put_user(regs->r13, &sc->ebp);
+ err |= __put_user(regs->r12, &sc->esp);
+ err |= __put_user(regs->r11, &sc->ebx);
+ err |= __put_user(regs->r10, &sc->edx);
+ err |= __put_user(regs->r9, &sc->ecx);
+ err |= __put_user(regs->r8, &sc->eax);
+#if 0
+ err |= __put_user(current->tss.trap_no, &sc->trapno);
+ err |= __put_user(current->tss.error_code, &sc->err);
+#endif
+ err |= __put_user(regs->cr_iip, &sc->eip);
+ err |= __put_user(regs->r17 & 0xffff, (unsigned int __user *)&sc->cs);
+ /*
+ * `eflags' is in an ar register for this context
+ */
+ flag = ia64_getreg(_IA64_REG_AR_EFLAG);
+ err |= __put_user((unsigned int)flag, &sc->eflags);
+ err |= __put_user(regs->r12, &sc->esp_at_signal);
+ err |= __put_user((regs->r17 >> 16) & 0xffff, (unsigned int __user *)&sc->ss);
+
+ if ( save_ia32_fpstate_live(fpstate) < 0 )
+ err = -EFAULT;
+ else
+ err |= __put_user((u32)(u64)fpstate, &sc->fpstate);
+
+#if 0
+ tmp = save_i387(fpstate);
+ if (tmp < 0)
+ err = 1;
+ else
+ err |= __put_user(tmp ? fpstate : NULL, &sc->fpstate);
+
+ /* non-iBCS2 extensions.. */
+#endif
+ err |= __put_user(mask, &sc->oldmask);
+#if 0
+ err |= __put_user(current->tss.cr2, &sc->cr2);
+#endif
+ return err;
+}
+
+static int
+restore_sigcontext_ia32 (struct pt_regs *regs, struct sigcontext_ia32 __user *sc, int *peax)
+{
+ unsigned int err = 0;
+
+ /* Always make any pending restarted system calls return -EINTR */
+ current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
+ if (!access_ok(VERIFY_READ, sc, sizeof(*sc)))
+ return(-EFAULT);
+
+#define COPY(ia64x, ia32x) err |= __get_user(regs->ia64x, &sc->ia32x)
+
+#define copyseg_gs(tmp) (regs->r16 |= (unsigned long) (tmp) << 48)
+#define copyseg_fs(tmp) (regs->r16 |= (unsigned long) (tmp) << 32)
+#define copyseg_cs(tmp) (regs->r17 |= tmp)
+#define copyseg_ss(tmp) (regs->r17 |= (unsigned long) (tmp) << 16)
+#define copyseg_es(tmp) (regs->r16 |= (unsigned long) (tmp) << 16)
+#define copyseg_ds(tmp) (regs->r16 |= tmp)
+
+#define COPY_SEG(seg) \
+ { \
+ unsigned short tmp; \
+ err |= __get_user(tmp, &sc->seg); \
+ copyseg_##seg(tmp); \
+ }
+#define COPY_SEG_STRICT(seg) \
+ { \
+ unsigned short tmp; \
+ err |= __get_user(tmp, &sc->seg); \
+ copyseg_##seg(tmp|3); \
+ }
+
+ /* To make COPY_SEGs easier, we zero r16, r17 */
+ regs->r16 = 0;
+ regs->r17 = 0;
+
+ COPY_SEG(gs);
+ COPY_SEG(fs);
+ COPY_SEG(es);
+ COPY_SEG(ds);
+ COPY(r15, edi);
+ COPY(r14, esi);
+ COPY(r13, ebp);
+ COPY(r12, esp);
+ COPY(r11, ebx);
+ COPY(r10, edx);
+ COPY(r9, ecx);
+ COPY(cr_iip, eip);
+ COPY_SEG_STRICT(cs);
+ COPY_SEG_STRICT(ss);
+ ia32_load_segment_descriptors(current);
+ {
+ unsigned int tmpflags;
+ unsigned long flag;
+
+ /*
+ * IA32 `eflags' is not part of `pt_regs', it's in an ar register which
+ * is part of the thread context. Fortunately, we are executing in the
+ * IA32 process's context.
+ */
+ err |= __get_user(tmpflags, &sc->eflags);
+ flag = ia64_getreg(_IA64_REG_AR_EFLAG);
+ flag &= ~0x40DD5;
+ flag |= (tmpflags & 0x40DD5);
+ ia64_setreg(_IA64_REG_AR_EFLAG, flag);
+
+ regs->r1 = -1; /* disable syscall checks, r1 is orig_eax */
+ }
+
+ {
+ struct _fpstate_ia32 __user *buf = NULL;
+ u32 fpstate_ptr;
+ err |= get_user(fpstate_ptr, &(sc->fpstate));
+ buf = compat_ptr(fpstate_ptr);
+ if (buf) {
+ err |= restore_ia32_fpstate_live(buf);
+ }
+ }
+
+#if 0
+ {
+ struct _fpstate * buf;
+ err |= __get_user(buf, &sc->fpstate);
+ if (buf) {
+ if (!access_ok(VERIFY_READ, buf, sizeof(*buf)))
+ goto badframe;
+ err |= restore_i387(buf);
+ }
+ }
+#endif
+
+ err |= __get_user(*peax, &sc->eax);
+ return err;
+
+#if 0
+ badframe:
+ return 1;
+#endif
+}
+
+/*
+ * Determine which stack to use..
+ */
+static inline void __user *
+get_sigframe (struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size)
+{
+ unsigned long esp;
+
+ /* Default to using normal stack (truncate off sign-extension of bit 31: */
+ esp = (unsigned int) regs->r12;
+
+ /* This is the X/Open sanctioned signal stack switching. */
+ if (ka->sa.sa_flags & SA_ONSTACK) {
+ if (!on_sig_stack(esp))
+ esp = current->sas_ss_sp + current->sas_ss_size;
+ }
+ /* Legacy stack switching not supported */
+
+ return (void __user *)((esp - frame_size) & -8ul);
+}
+
+static int
+setup_frame_ia32 (int sig, struct k_sigaction *ka, sigset_t *set, struct pt_regs * regs)
+{
+ struct exec_domain *ed = current_thread_info()->exec_domain;
+ struct sigframe_ia32 __user *frame;
+ int err = 0;
+
+ frame = get_sigframe(ka, regs, sizeof(*frame));
+
+ if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
+ goto give_sigsegv;
+
+ err |= __put_user((ed && ed->signal_invmap && sig < 32
+ ? (int)(ed->signal_invmap[sig]) : sig), &frame->sig);
+
+ err |= setup_sigcontext_ia32(&frame->sc, &frame->fpstate, regs, set->sig[0]);
+
+ if (_COMPAT_NSIG_WORDS > 1)
+ err |= __copy_to_user(frame->extramask, (char *) &set->sig + 4,
+ sizeof(frame->extramask));
+
+ /* Set up to return from userspace. If provided, use a stub
+ already in userspace. */
+ if (ka->sa.sa_flags & SA_RESTORER) {
+ unsigned int restorer = IA32_SA_RESTORER(ka);
+ err |= __put_user(restorer, &frame->pretcode);
+ } else {
+ /* Pointing to restorer in ia32 gate page */
+ err |= __put_user(IA32_GATE_OFFSET, &frame->pretcode);
+ }
+
+ /* This is popl %eax ; movl $,%eax ; int $0x80
+ * and there for historical reasons only.
+ * See arch/i386/kernel/signal.c
+ */
+
+ err |= __put_user(0xb858, (short __user *)(frame->retcode+0));
+ err |= __put_user(__IA32_NR_sigreturn, (int __user *)(frame->retcode+2));
+ err |= __put_user(0x80cd, (short __user *)(frame->retcode+6));
+
+ if (err)
+ goto give_sigsegv;
+
+ /* Set up registers for signal handler */
+ regs->r12 = (unsigned long) frame;
+ regs->cr_iip = IA32_SA_HANDLER(ka);
+
+ set_fs(USER_DS);
+
+#if 0
+ regs->eflags &= ~TF_MASK;
+#endif
+
+#if 0
+ printk("SIG deliver (%s:%d): sig=%d sp=%p pc=%lx ra=%x\n",
+ current->comm, current->pid, sig, (void *) frame, regs->cr_iip, frame->pretcode);
+#endif
+
+ return 1;
+
+ give_sigsegv:
+ force_sigsegv(sig, current);
+ return 0;
+}
+
+static int
+setup_rt_frame_ia32 (int sig, struct k_sigaction *ka, siginfo_t *info,
+ sigset_t *set, struct pt_regs * regs)
+{
+ struct exec_domain *ed = current_thread_info()->exec_domain;
+ compat_uptr_t pinfo, puc;
+ struct rt_sigframe_ia32 __user *frame;
+ int err = 0;
+
+ frame = get_sigframe(ka, regs, sizeof(*frame));
+
+ if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
+ goto give_sigsegv;
+
+ err |= __put_user((ed && ed->signal_invmap
+ && sig < 32 ? ed->signal_invmap[sig] : sig), &frame->sig);
+
+ pinfo = (long __user) &frame->info;
+ puc = (long __user) &frame->uc;
+ err |= __put_user(pinfo, &frame->pinfo);
+ err |= __put_user(puc, &frame->puc);
+ err |= copy_siginfo_to_user32(&frame->info, info);
+
+ /* Create the ucontext. */
+ err |= __put_user(0, &frame->uc.uc_flags);
+ err |= __put_user(0, &frame->uc.uc_link);
+ err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
+ err |= __put_user(sas_ss_flags(regs->r12), &frame->uc.uc_stack.ss_flags);
+ err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
+ err |= setup_sigcontext_ia32(&frame->uc.uc_mcontext, &frame->fpstate, regs, set->sig[0]);
+ err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
+ if (err)
+ goto give_sigsegv;
+
+ /* Set up to return from userspace. If provided, use a stub
+ already in userspace. */
+ if (ka->sa.sa_flags & SA_RESTORER) {
+ unsigned int restorer = IA32_SA_RESTORER(ka);
+ err |= __put_user(restorer, &frame->pretcode);
+ } else {
+ /* Pointing to rt_restorer in ia32 gate page */
+ err |= __put_user(IA32_GATE_OFFSET + 8, &frame->pretcode);
+ }
+
+ /* This is movl $,%eax ; int $0x80
+ * and there for historical reasons only.
+ * See arch/i386/kernel/signal.c
+ */
+
+ err |= __put_user(0xb8, (char __user *)(frame->retcode+0));
+ err |= __put_user(__IA32_NR_rt_sigreturn, (int __user *)(frame->retcode+1));
+ err |= __put_user(0x80cd, (short __user *)(frame->retcode+5));
+
+ if (err)
+ goto give_sigsegv;
+
+ /* Set up registers for signal handler */
+ regs->r12 = (unsigned long) frame;
+ regs->cr_iip = IA32_SA_HANDLER(ka);
+
+ set_fs(USER_DS);
+
+#if 0
+ regs->eflags &= ~TF_MASK;
+#endif
+
+#if 0
+ printk("SIG deliver (%s:%d): sp=%p pc=%lx ra=%x\n",
+ current->comm, current->pid, (void *) frame, regs->cr_iip, frame->pretcode);
+#endif
+
+ return 1;
+
+give_sigsegv:
+ force_sigsegv(sig, current);
+ return 0;
+}
+
+int
+ia32_setup_frame1 (int sig, struct k_sigaction *ka, siginfo_t *info,
+ sigset_t *set, struct pt_regs *regs)
+{
+ /* Set up the stack frame */
+ if (ka->sa.sa_flags & SA_SIGINFO)
+ return setup_rt_frame_ia32(sig, ka, info, set, regs);
+ else
+ return setup_frame_ia32(sig, ka, set, regs);
+}
+
+asmlinkage long
+sys32_sigreturn (int arg0, int arg1, int arg2, int arg3, int arg4, int arg5,
+ int arg6, int arg7, struct pt_regs regs)
+{
+ unsigned long esp = (unsigned int) regs.r12;
+ struct sigframe_ia32 __user *frame = (struct sigframe_ia32 __user *)(esp - 8);
+ sigset_t set;
+ int eax;
+
+ if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+ goto badframe;
+
+ if (__get_user(set.sig[0], &frame->sc.oldmask)
+ || (_COMPAT_NSIG_WORDS > 1 && __copy_from_user((char *) &set.sig + 4, &frame->extramask,
+ sizeof(frame->extramask))))
+ goto badframe;
+
+ sigdelsetmask(&set, ~_BLOCKABLE);
+ spin_lock_irq(&current->sighand->siglock);
+ current->blocked = set;
+ recalc_sigpending();
+ spin_unlock_irq(&current->sighand->siglock);
+
+ if (restore_sigcontext_ia32(&regs, &frame->sc, &eax))
+ goto badframe;
+ return eax;
+
+ badframe:
+ force_sig(SIGSEGV, current);
+ return 0;
+}
+
+asmlinkage long
+sys32_rt_sigreturn (int arg0, int arg1, int arg2, int arg3, int arg4,
+ int arg5, int arg6, int arg7, struct pt_regs regs)
+{
+ unsigned long esp = (unsigned int) regs.r12;
+ struct rt_sigframe_ia32 __user *frame = (struct rt_sigframe_ia32 __user *)(esp - 4);
+ sigset_t set;
+ int eax;
+
+ if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+ goto badframe;
+ if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
+ goto badframe;
+
+ sigdelsetmask(&set, ~_BLOCKABLE);
+ spin_lock_irq(&current->sighand->siglock);
+ current->blocked = set;
+ recalc_sigpending();
+ spin_unlock_irq(&current->sighand->siglock);
+
+ if (restore_sigcontext_ia32(&regs, &frame->uc.uc_mcontext, &eax))
+ goto badframe;
+
+ /* It is more difficult to avoid calling this function than to
+ call it and ignore errors. */
+ do_sigaltstack((stack_t __user *) &frame->uc.uc_stack, NULL, esp);
+
+ return eax;
+
+ badframe:
+ force_sig(SIGSEGV, current);
+ return 0;
+}