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android_kernel_samsung_msm8976/arch/sparc64/kernel/signal32.c
Steven Rostedt 69be8f1896 [PATCH] convert signal handling of NODEFER to act like other Unix boxes. 
It has been reported that the way Linux handles NODEFER for signals is
not consistent with the way other Unix boxes handle it.  I've written a
program to test the behavior of how this flag affects signals and had
several reports from people who ran this on various Unix boxes,
confirming that Linux seems to be unique on the way this is handled.

The way NODEFER affects signals on other Unix boxes is as follows:

1) If NODEFER is set, other signals in sa_mask are still blocked.

2) If NODEFER is set and the signal is in sa_mask, then the signal is
still blocked. (Note: this is the behavior of all tested but Linux _and_
NetBSD 2.0 *).

The way NODEFER affects signals on Linux:

1) If NODEFER is set, other signals are _not_ blocked regardless of
sa_mask (Even NetBSD doesn't do this).

2) If NODEFER is set and the signal is in sa_mask, then the signal being
handled is not blocked.

The patch converts signal handling in all current Linux architectures to
the way most Unix boxes work.

Unix boxes that were tested:  DU4, AIX 5.2, Irix 6.5, NetBSD 2.0, SFU
3.5 on WinXP, AIX 5.3, Mac OSX, and of course Linux 2.6.13-rcX.

* NetBSD was the only other Unix to behave like Linux on point #2. The
main concern was brought up by point #1 which even NetBSD isn't like
Linux.  So with this patch, we leave NetBSD as the lonely one that
behaves differently here with #2.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-08-29 10:03:11 -07:00

1471 lines
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/* $Id: signal32.c,v 1.74 2002/02/09 19:49:30 davem Exp $
* arch/sparc64/kernel/signal32.c
*
* Copyright (C) 1991, 1992 Linus Torvalds
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
* Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
* Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
* Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
*/
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/signal.h>
#include <linux/errno.h>
#include <linux/wait.h>
#include <linux/ptrace.h>
#include <linux/unistd.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/smp_lock.h>
#include <linux/binfmts.h>
#include <linux/compat.h>
#include <linux/bitops.h>
#include <asm/uaccess.h>
#include <asm/ptrace.h>
#include <asm/svr4.h>
#include <asm/pgtable.h>
#include <asm/psrcompat.h>
#include <asm/fpumacro.h>
#include <asm/visasm.h>
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
int do_signal32(sigset_t *oldset, struct pt_regs *regs,
unsigned long orig_o0, int ret_from_syscall);
/* Signal frames: the original one (compatible with SunOS):
*
* Set up a signal frame... Make the stack look the way SunOS
* expects it to look which is basically:
*
* ---------------------------------- <-- %sp at signal time
* Struct sigcontext
* Signal address
* Ptr to sigcontext area above
* Signal code
* The signal number itself
* One register window
* ---------------------------------- <-- New %sp
*/
struct signal_sframe32 {
struct reg_window32 sig_window;
int sig_num;
int sig_code;
/* struct sigcontext32 * */ u32 sig_scptr;
int sig_address;
struct sigcontext32 sig_context;
unsigned int extramask[_COMPAT_NSIG_WORDS - 1];
};
/* This magic should be in g_upper[0] for all upper parts
* to be valid.
*/
#define SIGINFO_EXTRA_V8PLUS_MAGIC 0x130e269
typedef struct {
unsigned int g_upper[8];
unsigned int o_upper[8];
unsigned int asi;
} siginfo_extra_v8plus_t;
/*
* And the new one, intended to be used for Linux applications only
* (we have enough in there to work with clone).
* All the interesting bits are in the info field.
*/
struct new_signal_frame32 {
struct sparc_stackf32 ss;
__siginfo32_t info;
/* __siginfo_fpu32_t * */ u32 fpu_save;
unsigned int insns[2];
unsigned int extramask[_COMPAT_NSIG_WORDS - 1];
unsigned int extra_size; /* Should be sizeof(siginfo_extra_v8plus_t) */
/* Only valid if (info.si_regs.psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS */
siginfo_extra_v8plus_t v8plus;
__siginfo_fpu_t fpu_state;
};
typedef struct compat_siginfo{
int si_signo;
int si_errno;
int si_code;
union {
int _pad[SI_PAD_SIZE32];
/* kill() */
struct {
compat_pid_t _pid; /* sender's pid */
unsigned int _uid; /* sender's uid */
} _kill;
/* POSIX.1b timers */
struct {
compat_timer_t _tid; /* timer id */
int _overrun; /* overrun count */
compat_sigval_t _sigval; /* same as below */
int _sys_private; /* not to be passed to user */
} _timer;
/* POSIX.1b signals */
struct {
compat_pid_t _pid; /* sender's pid */
unsigned int _uid; /* sender's uid */
compat_sigval_t _sigval;
} _rt;
/* SIGCHLD */
struct {
compat_pid_t _pid; /* which child */
unsigned int _uid; /* sender's uid */
int _status; /* exit code */
compat_clock_t _utime;
compat_clock_t _stime;
} _sigchld;
/* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGEMT */
struct {
u32 _addr; /* faulting insn/memory ref. */
int _trapno;
} _sigfault;
/* SIGPOLL */
struct {
int _band; /* POLL_IN, POLL_OUT, POLL_MSG */
int _fd;
} _sigpoll;
} _sifields;
}compat_siginfo_t;
struct rt_signal_frame32 {
struct sparc_stackf32 ss;
compat_siginfo_t info;
struct pt_regs32 regs;
compat_sigset_t mask;
/* __siginfo_fpu32_t * */ u32 fpu_save;
unsigned int insns[2];
stack_t32 stack;
unsigned int extra_size; /* Should be sizeof(siginfo_extra_v8plus_t) */
/* Only valid if (regs.psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS */
siginfo_extra_v8plus_t v8plus;
__siginfo_fpu_t fpu_state;
};
/* Align macros */
#define SF_ALIGNEDSZ (((sizeof(struct signal_sframe32) + 7) & (~7)))
#define NF_ALIGNEDSZ (((sizeof(struct new_signal_frame32) + 7) & (~7)))
#define RT_ALIGNEDSZ (((sizeof(struct rt_signal_frame32) + 7) & (~7)))
int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
{
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_TIMER >> 16:
err |= __put_user(from->si_tid, &to->si_tid);
err |= __put_user(from->si_overrun, &to->si_overrun);
err |= __put_user(from->si_int, &to->si_int);
break;
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:
err |= __put_user(from->si_trapno, &to->si_trapno);
err |= __put_user((unsigned long)from->si_addr, &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_RT >> 16: /* This is not generated by the kernel as of now. */
case __SI_MESGQ >> 16:
err |= __put_user(from->si_pid, &to->si_pid);
err |= __put_user(from->si_uid, &to->si_uid);
err |= __put_user(from->si_int, &to->si_int);
break;
}
}
return err;
}
/* CAUTION: This is just a very minimalist implementation for the
* sake of compat_sys_rt_sigqueueinfo()
*/
int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
{
if (!access_ok(VERIFY_WRITE, from, sizeof(compat_siginfo_t)))
return -EFAULT;
if (copy_from_user(to, from, 3*sizeof(int)) ||
copy_from_user(to->_sifields._pad, from->_sifields._pad,
SI_PAD_SIZE))
return -EFAULT;
return 0;
}
/*
* atomically swap in the new signal mask, and wait for a signal.
* This is really tricky on the Sparc, watch out...
*/
asmlinkage void _sigpause32_common(compat_old_sigset_t set, struct pt_regs *regs)
{
sigset_t saveset;
set &= _BLOCKABLE;
spin_lock_irq(&current->sighand->siglock);
saveset = current->blocked;
siginitset(&current->blocked, set);
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
regs->tpc = regs->tnpc;
regs->tnpc += 4;
if (test_thread_flag(TIF_32BIT)) {
regs->tpc &= 0xffffffff;
regs->tnpc &= 0xffffffff;
}
/* Condition codes and return value where set here for sigpause,
* and so got used by setup_frame, which again causes sigreturn()
* to return -EINTR.
*/
while (1) {
current->state = TASK_INTERRUPTIBLE;
schedule();
/*
* Return -EINTR and set condition code here,
* so the interrupted system call actually returns
* these.
*/
regs->tstate |= TSTATE_ICARRY;
regs->u_regs[UREG_I0] = EINTR;
if (do_signal32(&saveset, regs, 0, 0))
return;
}
}
asmlinkage void do_rt_sigsuspend32(u32 uset, size_t sigsetsize, struct pt_regs *regs)
{
sigset_t oldset, set;
compat_sigset_t set32;
/* XXX: Don't preclude handling different sized sigset_t's. */
if (((compat_size_t)sigsetsize) != sizeof(sigset_t)) {
regs->tstate |= TSTATE_ICARRY;
regs->u_regs[UREG_I0] = EINVAL;
return;
}
if (copy_from_user(&set32, compat_ptr(uset), sizeof(set32))) {
regs->tstate |= TSTATE_ICARRY;
regs->u_regs[UREG_I0] = EFAULT;
return;
}
switch (_NSIG_WORDS) {
case 4: set.sig[3] = set32.sig[6] + (((long)set32.sig[7]) << 32);
case 3: set.sig[2] = set32.sig[4] + (((long)set32.sig[5]) << 32);
case 2: set.sig[1] = set32.sig[2] + (((long)set32.sig[3]) << 32);
case 1: set.sig[0] = set32.sig[0] + (((long)set32.sig[1]) << 32);
}
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(&current->sighand->siglock);
oldset = current->blocked;
current->blocked = set;
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
regs->tpc = regs->tnpc;
regs->tnpc += 4;
if (test_thread_flag(TIF_32BIT)) {
regs->tpc &= 0xffffffff;
regs->tnpc &= 0xffffffff;
}
/* Condition codes and return value where set here for sigpause,
* and so got used by setup_frame, which again causes sigreturn()
* to return -EINTR.
*/
while (1) {
current->state = TASK_INTERRUPTIBLE;
schedule();
/*
* Return -EINTR and set condition code here,
* so the interrupted system call actually returns
* these.
*/
regs->tstate |= TSTATE_ICARRY;
regs->u_regs[UREG_I0] = EINTR;
if (do_signal32(&oldset, regs, 0, 0))
return;
}
}
static int restore_fpu_state32(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
{
unsigned long *fpregs = current_thread_info()->fpregs;
unsigned long fprs;
int err;
err = __get_user(fprs, &fpu->si_fprs);
fprs_write(0);
regs->tstate &= ~TSTATE_PEF;
if (fprs & FPRS_DL)
err |= copy_from_user(fpregs, &fpu->si_float_regs[0], (sizeof(unsigned int) * 32));
if (fprs & FPRS_DU)
err |= copy_from_user(fpregs+16, &fpu->si_float_regs[32], (sizeof(unsigned int) * 32));
err |= __get_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
err |= __get_user(current_thread_info()->gsr[0], &fpu->si_gsr);
current_thread_info()->fpsaved[0] |= fprs;
return err;
}
void do_new_sigreturn32(struct pt_regs *regs)
{
struct new_signal_frame32 __user *sf;
unsigned int psr;
unsigned pc, npc, fpu_save;
sigset_t set;
unsigned seta[_COMPAT_NSIG_WORDS];
int err, i;
regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
sf = (struct new_signal_frame32 __user *) regs->u_regs[UREG_FP];
/* 1. Make sure we are not getting garbage from the user */
if (!access_ok(VERIFY_READ, sf, sizeof(*sf)) ||
(((unsigned long) sf) & 3))
goto segv;
get_user(pc, &sf->info.si_regs.pc);
__get_user(npc, &sf->info.si_regs.npc);
if ((pc | npc) & 3)
goto segv;
if (test_thread_flag(TIF_32BIT)) {
pc &= 0xffffffff;
npc &= 0xffffffff;
}
regs->tpc = pc;
regs->tnpc = npc;
/* 2. Restore the state */
err = __get_user(regs->y, &sf->info.si_regs.y);
err |= __get_user(psr, &sf->info.si_regs.psr);
for (i = UREG_G1; i <= UREG_I7; i++)
err |= __get_user(regs->u_regs[i], &sf->info.si_regs.u_regs[i]);
if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS) {
err |= __get_user(i, &sf->v8plus.g_upper[0]);
if (i == SIGINFO_EXTRA_V8PLUS_MAGIC) {
unsigned long asi;
for (i = UREG_G1; i <= UREG_I7; i++)
err |= __get_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]);
err |= __get_user(asi, &sf->v8plus.asi);
regs->tstate &= ~TSTATE_ASI;
regs->tstate |= ((asi & 0xffUL) << 24UL);
}
}
/* User can only change condition codes in %tstate. */
regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
regs->tstate |= psr_to_tstate_icc(psr);
err |= __get_user(fpu_save, &sf->fpu_save);
if (fpu_save)
err |= restore_fpu_state32(regs, &sf->fpu_state);
err |= __get_user(seta[0], &sf->info.si_mask);
err |= copy_from_user(seta+1, &sf->extramask,
(_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int));
if (err)
goto segv;
switch (_NSIG_WORDS) {
case 4: set.sig[3] = seta[6] + (((long)seta[7]) << 32);
case 3: set.sig[2] = seta[4] + (((long)seta[5]) << 32);
case 2: set.sig[1] = seta[2] + (((long)seta[3]) << 32);
case 1: set.sig[0] = seta[0] + (((long)seta[1]) << 32);
}
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(&current->sighand->siglock);
current->blocked = set;
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
return;
segv:
force_sig(SIGSEGV, current);
}
asmlinkage void do_sigreturn32(struct pt_regs *regs)
{
struct sigcontext32 __user *scptr;
unsigned int pc, npc, psr;
sigset_t set;
unsigned int seta[_COMPAT_NSIG_WORDS];
int err;
/* Always make any pending restarted system calls return -EINTR */
current_thread_info()->restart_block.fn = do_no_restart_syscall;
synchronize_user_stack();
if (test_thread_flag(TIF_NEWSIGNALS)) {
do_new_sigreturn32(regs);
return;
}
scptr = (struct sigcontext32 __user *)
(regs->u_regs[UREG_I0] & 0x00000000ffffffffUL);
/* Check sanity of the user arg. */
if (!access_ok(VERIFY_READ, scptr, sizeof(struct sigcontext32)) ||
(((unsigned long) scptr) & 3))
goto segv;
err = __get_user(pc, &scptr->sigc_pc);
err |= __get_user(npc, &scptr->sigc_npc);
if ((pc | npc) & 3)
goto segv; /* Nice try. */
err |= __get_user(seta[0], &scptr->sigc_mask);
/* Note that scptr + 1 points to extramask */
err |= copy_from_user(seta+1, scptr + 1,
(_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int));
if (err)
goto segv;
switch (_NSIG_WORDS) {
case 4: set.sig[3] = seta[6] + (((long)seta[7]) << 32);
case 3: set.sig[2] = seta[4] + (((long)seta[5]) << 32);
case 2: set.sig[1] = seta[2] + (((long)seta[3]) << 32);
case 1: set.sig[0] = seta[0] + (((long)seta[1]) << 32);
}
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(&current->sighand->siglock);
current->blocked = set;
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
if (test_thread_flag(TIF_32BIT)) {
pc &= 0xffffffff;
npc &= 0xffffffff;
}
regs->tpc = pc;
regs->tnpc = npc;
err = __get_user(regs->u_regs[UREG_FP], &scptr->sigc_sp);
err |= __get_user(regs->u_regs[UREG_I0], &scptr->sigc_o0);
err |= __get_user(regs->u_regs[UREG_G1], &scptr->sigc_g1);
/* User can only change condition codes in %tstate. */
err |= __get_user(psr, &scptr->sigc_psr);
if (err)
goto segv;
regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
regs->tstate |= psr_to_tstate_icc(psr);
return;
segv:
force_sig(SIGSEGV, current);
}
asmlinkage void do_rt_sigreturn32(struct pt_regs *regs)
{
struct rt_signal_frame32 __user *sf;
unsigned int psr, pc, npc, fpu_save, u_ss_sp;
mm_segment_t old_fs;
sigset_t set;
compat_sigset_t seta;
stack_t st;
int err, i;
/* Always make any pending restarted system calls return -EINTR */
current_thread_info()->restart_block.fn = do_no_restart_syscall;
synchronize_user_stack();
regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
sf = (struct rt_signal_frame32 __user *) regs->u_regs[UREG_FP];
/* 1. Make sure we are not getting garbage from the user */
if (!access_ok(VERIFY_READ, sf, sizeof(*sf)) ||
(((unsigned long) sf) & 3))
goto segv;
get_user(pc, &sf->regs.pc);
__get_user(npc, &sf->regs.npc);
if ((pc | npc) & 3)
goto segv;
if (test_thread_flag(TIF_32BIT)) {
pc &= 0xffffffff;
npc &= 0xffffffff;
}
regs->tpc = pc;
regs->tnpc = npc;
/* 2. Restore the state */
err = __get_user(regs->y, &sf->regs.y);
err |= __get_user(psr, &sf->regs.psr);
for (i = UREG_G1; i <= UREG_I7; i++)
err |= __get_user(regs->u_regs[i], &sf->regs.u_regs[i]);
if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS) {
err |= __get_user(i, &sf->v8plus.g_upper[0]);
if (i == SIGINFO_EXTRA_V8PLUS_MAGIC) {
unsigned long asi;
for (i = UREG_G1; i <= UREG_I7; i++)
err |= __get_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]);
err |= __get_user(asi, &sf->v8plus.asi);
regs->tstate &= ~TSTATE_ASI;
regs->tstate |= ((asi & 0xffUL) << 24UL);
}
}
/* User can only change condition codes in %tstate. */
regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
regs->tstate |= psr_to_tstate_icc(psr);
err |= __get_user(fpu_save, &sf->fpu_save);
if (fpu_save)
err |= restore_fpu_state32(regs, &sf->fpu_state);
err |= copy_from_user(&seta, &sf->mask, sizeof(compat_sigset_t));
err |= __get_user(u_ss_sp, &sf->stack.ss_sp);
st.ss_sp = compat_ptr(u_ss_sp);
err |= __get_user(st.ss_flags, &sf->stack.ss_flags);
err |= __get_user(st.ss_size, &sf->stack.ss_size);
if (err)
goto segv;
/* It is more difficult to avoid calling this function than to
call it and ignore errors. */
old_fs = get_fs();
set_fs(KERNEL_DS);
do_sigaltstack((stack_t __user *) &st, NULL, (unsigned long)sf);
set_fs(old_fs);
switch (_NSIG_WORDS) {
case 4: set.sig[3] = seta.sig[6] + (((long)seta.sig[7]) << 32);
case 3: set.sig[2] = seta.sig[4] + (((long)seta.sig[5]) << 32);
case 2: set.sig[1] = seta.sig[2] + (((long)seta.sig[3]) << 32);
case 1: set.sig[0] = seta.sig[0] + (((long)seta.sig[1]) << 32);
}
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(&current->sighand->siglock);
current->blocked = set;
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
return;
segv:
force_sig(SIGSEGV, current);
}
/* Checks if the fp is valid */
static int invalid_frame_pointer(void __user *fp, int fplen)
{
if ((((unsigned long) fp) & 7) || ((unsigned long)fp) > 0x100000000ULL - fplen)
return 1;
return 0;
}
static void __user *get_sigframe(struct sigaction *sa, struct pt_regs *regs, unsigned long framesize)
{
unsigned long sp;
regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
sp = regs->u_regs[UREG_FP];
/* This is the X/Open sanctioned signal stack switching. */
if (sa->sa_flags & SA_ONSTACK) {
if (!on_sig_stack(sp) && !((current->sas_ss_sp + current->sas_ss_size) & 7))
sp = current->sas_ss_sp + current->sas_ss_size;
}
return (void __user *)(sp - framesize);
}
static void
setup_frame32(struct sigaction *sa, struct pt_regs *regs, int signr, sigset_t *oldset, siginfo_t *info)
{
struct signal_sframe32 __user *sframep;
struct sigcontext32 __user *sc;
unsigned int seta[_COMPAT_NSIG_WORDS];
int err = 0;
void __user *sig_address;
int sig_code;
unsigned long pc = regs->tpc;
unsigned long npc = regs->tnpc;
unsigned int psr;
if (test_thread_flag(TIF_32BIT)) {
pc &= 0xffffffff;
npc &= 0xffffffff;
}
synchronize_user_stack();
save_and_clear_fpu();
sframep = (struct signal_sframe32 __user *)
get_sigframe(sa, regs, SF_ALIGNEDSZ);
if (invalid_frame_pointer(sframep, sizeof(*sframep))){
/* Don't change signal code and address, so that
* post mortem debuggers can have a look.
*/
do_exit(SIGILL);
}
sc = &sframep->sig_context;
/* We've already made sure frame pointer isn't in kernel space... */
err = __put_user((sas_ss_flags(regs->u_regs[UREG_FP]) == SS_ONSTACK),
&sc->sigc_onstack);
switch (_NSIG_WORDS) {
case 4: seta[7] = (oldset->sig[3] >> 32);
seta[6] = oldset->sig[3];
case 3: seta[5] = (oldset->sig[2] >> 32);
seta[4] = oldset->sig[2];
case 2: seta[3] = (oldset->sig[1] >> 32);
seta[2] = oldset->sig[1];
case 1: seta[1] = (oldset->sig[0] >> 32);
seta[0] = oldset->sig[0];
}
err |= __put_user(seta[0], &sc->sigc_mask);
err |= __copy_to_user(sframep->extramask, seta + 1,
(_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int));
err |= __put_user(regs->u_regs[UREG_FP], &sc->sigc_sp);
err |= __put_user(pc, &sc->sigc_pc);
err |= __put_user(npc, &sc->sigc_npc);
psr = tstate_to_psr(regs->tstate);
if (current_thread_info()->fpsaved[0] & FPRS_FEF)
psr |= PSR_EF;
err |= __put_user(psr, &sc->sigc_psr);
err |= __put_user(regs->u_regs[UREG_G1], &sc->sigc_g1);
err |= __put_user(regs->u_regs[UREG_I0], &sc->sigc_o0);
err |= __put_user(get_thread_wsaved(), &sc->sigc_oswins);
err |= copy_in_user((u32 __user *)sframep,
(u32 __user *)(regs->u_regs[UREG_FP]),
sizeof(struct reg_window32));
set_thread_wsaved(0); /* So process is allowed to execute. */
err |= __put_user(signr, &sframep->sig_num);
sig_address = NULL;
sig_code = 0;
if (SI_FROMKERNEL (info) && (info->si_code & __SI_MASK) == __SI_FAULT) {
sig_address = info->si_addr;
switch (signr) {
case SIGSEGV:
switch (info->si_code) {
case SEGV_MAPERR: sig_code = SUBSIG_NOMAPPING; break;
default: sig_code = SUBSIG_PROTECTION; break;
}
break;
case SIGILL:
switch (info->si_code) {
case ILL_ILLOPC: sig_code = SUBSIG_ILLINST; break;
case ILL_PRVOPC: sig_code = SUBSIG_PRIVINST; break;
case ILL_ILLTRP: sig_code = SUBSIG_BADTRAP(info->si_trapno); break;
default: sig_code = SUBSIG_STACK; break;
}
break;
case SIGFPE:
switch (info->si_code) {
case FPE_INTDIV: sig_code = SUBSIG_IDIVZERO; break;
case FPE_INTOVF: sig_code = SUBSIG_FPINTOVFL; break;
case FPE_FLTDIV: sig_code = SUBSIG_FPDIVZERO; break;
case FPE_FLTOVF: sig_code = SUBSIG_FPOVFLOW; break;
case FPE_FLTUND: sig_code = SUBSIG_FPUNFLOW; break;
case FPE_FLTRES: sig_code = SUBSIG_FPINEXACT; break;
case FPE_FLTINV: sig_code = SUBSIG_FPOPERROR; break;
default: sig_code = SUBSIG_FPERROR; break;
}
break;
case SIGBUS:
switch (info->si_code) {
case BUS_ADRALN: sig_code = SUBSIG_ALIGNMENT; break;
case BUS_ADRERR: sig_code = SUBSIG_MISCERROR; break;
default: sig_code = SUBSIG_BUSTIMEOUT; break;
}
break;
case SIGEMT:
switch (info->si_code) {
case EMT_TAGOVF: sig_code = SUBSIG_TAG; break;
}
break;
case SIGSYS:
if (info->si_code == (__SI_FAULT|0x100)) {
/* See sys_sunos32.c */
sig_code = info->si_trapno;
break;
}
default:
sig_address = NULL;
}
}
err |= __put_user(ptr_to_compat(sig_address), &sframep->sig_address);
err |= __put_user(sig_code, &sframep->sig_code);
err |= __put_user(ptr_to_compat(sc), &sframep->sig_scptr);
if (err)
goto sigsegv;
regs->u_regs[UREG_FP] = (unsigned long) sframep;
regs->tpc = (unsigned long) sa->sa_handler;
regs->tnpc = (regs->tpc + 4);
if (test_thread_flag(TIF_32BIT)) {
regs->tpc &= 0xffffffff;
regs->tnpc &= 0xffffffff;
}
return;
sigsegv:
force_sigsegv(signr, current);
}
static int save_fpu_state32(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
{
unsigned long *fpregs = current_thread_info()->fpregs;
unsigned long fprs;
int err = 0;
fprs = current_thread_info()->fpsaved[0];
if (fprs & FPRS_DL)
err |= copy_to_user(&fpu->si_float_regs[0], fpregs,
(sizeof(unsigned int) * 32));
if (fprs & FPRS_DU)
err |= copy_to_user(&fpu->si_float_regs[32], fpregs+16,
(sizeof(unsigned int) * 32));
err |= __put_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
err |= __put_user(current_thread_info()->gsr[0], &fpu->si_gsr);
err |= __put_user(fprs, &fpu->si_fprs);
return err;
}
static void new_setup_frame32(struct k_sigaction *ka, struct pt_regs *regs,
int signo, sigset_t *oldset)
{
struct new_signal_frame32 __user *sf;
int sigframe_size;
u32 psr;
int i, err;
unsigned int seta[_COMPAT_NSIG_WORDS];
/* 1. Make sure everything is clean */
synchronize_user_stack();
save_and_clear_fpu();
sigframe_size = NF_ALIGNEDSZ;
if (!(current_thread_info()->fpsaved[0] & FPRS_FEF))
sigframe_size -= sizeof(__siginfo_fpu_t);
sf = (struct new_signal_frame32 __user *)
get_sigframe(&ka->sa, regs, sigframe_size);
if (invalid_frame_pointer(sf, sigframe_size))
goto sigill;
if (get_thread_wsaved() != 0)
goto sigill;
/* 2. Save the current process state */
if (test_thread_flag(TIF_32BIT)) {
regs->tpc &= 0xffffffff;
regs->tnpc &= 0xffffffff;
}
err = put_user(regs->tpc, &sf->info.si_regs.pc);
err |= __put_user(regs->tnpc, &sf->info.si_regs.npc);
err |= __put_user(regs->y, &sf->info.si_regs.y);
psr = tstate_to_psr(regs->tstate);
if (current_thread_info()->fpsaved[0] & FPRS_FEF)
psr |= PSR_EF;
err |= __put_user(psr, &sf->info.si_regs.psr);
for (i = 0; i < 16; i++)
err |= __put_user(regs->u_regs[i], &sf->info.si_regs.u_regs[i]);
err |= __put_user(sizeof(siginfo_extra_v8plus_t), &sf->extra_size);
err |= __put_user(SIGINFO_EXTRA_V8PLUS_MAGIC, &sf->v8plus.g_upper[0]);
for (i = 1; i < 16; i++)
err |= __put_user(((u32 *)regs->u_regs)[2*i],
&sf->v8plus.g_upper[i]);
err |= __put_user((regs->tstate & TSTATE_ASI) >> 24UL,
&sf->v8plus.asi);
if (psr & PSR_EF) {
err |= save_fpu_state32(regs, &sf->fpu_state);
err |= __put_user((u64)&sf->fpu_state, &sf->fpu_save);
} else {
err |= __put_user(0, &sf->fpu_save);
}
switch (_NSIG_WORDS) {
case 4: seta[7] = (oldset->sig[3] >> 32);
seta[6] = oldset->sig[3];
case 3: seta[5] = (oldset->sig[2] >> 32);
seta[4] = oldset->sig[2];
case 2: seta[3] = (oldset->sig[1] >> 32);
seta[2] = oldset->sig[1];
case 1: seta[1] = (oldset->sig[0] >> 32);
seta[0] = oldset->sig[0];
}
err |= __put_user(seta[0], &sf->info.si_mask);
err |= __copy_to_user(sf->extramask, seta + 1,
(_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int));
err |= copy_in_user((u32 __user *)sf,
(u32 __user *)(regs->u_regs[UREG_FP]),
sizeof(struct reg_window32));
if (err)
goto sigsegv;
/* 3. signal handler back-trampoline and parameters */
regs->u_regs[UREG_FP] = (unsigned long) sf;
regs->u_regs[UREG_I0] = signo;
regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
regs->u_regs[UREG_I2] = (unsigned long) &sf->info;
/* 4. signal handler */
regs->tpc = (unsigned long) ka->sa.sa_handler;
regs->tnpc = (regs->tpc + 4);
if (test_thread_flag(TIF_32BIT)) {
regs->tpc &= 0xffffffff;
regs->tnpc &= 0xffffffff;
}
/* 5. return to kernel instructions */
if (ka->ka_restorer) {
regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
} else {
/* Flush instruction space. */
unsigned long address = ((unsigned long)&(sf->insns[0]));
pgd_t *pgdp = pgd_offset(current->mm, address);
pud_t *pudp = pud_offset(pgdp, address);
pmd_t *pmdp = pmd_offset(pudp, address);
pte_t *ptep;
regs->u_regs[UREG_I7] = (unsigned long) (&(sf->insns[0]) - 2);
err = __put_user(0x821020d8, &sf->insns[0]); /*mov __NR_sigreturn, %g1*/
err |= __put_user(0x91d02010, &sf->insns[1]); /*t 0x10*/
if (err)
goto sigsegv;
preempt_disable();
ptep = pte_offset_map(pmdp, address);
if (pte_present(*ptep)) {
unsigned long page = (unsigned long)
page_address(pte_page(*ptep));
__asm__ __volatile__(
" membar #StoreStore\n"
" flush %0 + %1"
: : "r" (page), "r" (address & (PAGE_SIZE - 1))
: "memory");
}
pte_unmap(ptep);
preempt_enable();
}
return;
sigill:
do_exit(SIGILL);
sigsegv:
force_sigsegv(signo, current);
}
/* Setup a Solaris stack frame */
static void
setup_svr4_frame32(struct sigaction *sa, unsigned long pc, unsigned long npc,
struct pt_regs *regs, int signr, sigset_t *oldset)
{
svr4_signal_frame_t __user *sfp;
svr4_gregset_t __user *gr;
svr4_siginfo_t __user *si;
svr4_mcontext_t __user *mc;
svr4_gwindows_t __user *gw;
svr4_ucontext_t __user *uc;
svr4_sigset_t setv;
unsigned int psr;
int i, err;
synchronize_user_stack();
save_and_clear_fpu();
regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
sfp = (svr4_signal_frame_t __user *)
get_sigframe(sa, regs,
sizeof(struct reg_window32) + SVR4_SF_ALIGNED);
if (invalid_frame_pointer(sfp, sizeof(*sfp)))
do_exit(SIGILL);
/* Start with a clean frame pointer and fill it */
err = clear_user(sfp, sizeof(*sfp));
/* Setup convenience variables */
si = &sfp->si;
uc = &sfp->uc;
gw = &sfp->gw;
mc = &uc->mcontext;
gr = &mc->greg;
/* FIXME: where am I supposed to put this?
* sc->sigc_onstack = old_status;
* anyways, it does not look like it is used for anything at all.
*/
setv.sigbits[0] = oldset->sig[0];
setv.sigbits[1] = (oldset->sig[0] >> 32);
if (_NSIG_WORDS >= 2) {
setv.sigbits[2] = oldset->sig[1];
setv.sigbits[3] = (oldset->sig[1] >> 32);
err |= __copy_to_user(&uc->sigmask, &setv, sizeof(svr4_sigset_t));
} else
err |= __copy_to_user(&uc->sigmask, &setv,
2 * sizeof(unsigned int));
/* Store registers */
if (test_thread_flag(TIF_32BIT)) {
regs->tpc &= 0xffffffff;
regs->tnpc &= 0xffffffff;
}
err |= __put_user(regs->tpc, &((*gr)[SVR4_PC]));
err |= __put_user(regs->tnpc, &((*gr)[SVR4_NPC]));
psr = tstate_to_psr(regs->tstate);
if (current_thread_info()->fpsaved[0] & FPRS_FEF)
psr |= PSR_EF;
err |= __put_user(psr, &((*gr)[SVR4_PSR]));
err |= __put_user(regs->y, &((*gr)[SVR4_Y]));
/* Copy g[1..7] and o[0..7] registers */
for (i = 0; i < 7; i++)
err |= __put_user(regs->u_regs[UREG_G1+i], (&(*gr)[SVR4_G1])+i);
for (i = 0; i < 8; i++)
err |= __put_user(regs->u_regs[UREG_I0+i], (&(*gr)[SVR4_O0])+i);
/* Setup sigaltstack */
err |= __put_user(current->sas_ss_sp, &uc->stack.sp);
err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &uc->stack.flags);
err |= __put_user(current->sas_ss_size, &uc->stack.size);
/* Save the currently window file: */
/* 1. Link sfp->uc->gwins to our windows */
err |= __put_user(ptr_to_compat(gw), &mc->gwin);
/* 2. Number of windows to restore at setcontext (): */
err |= __put_user(get_thread_wsaved(), &gw->count);
/* 3. We just pay attention to the gw->count field on setcontext */
set_thread_wsaved(0); /* So process is allowed to execute. */
/* Setup the signal information. Solaris expects a bunch of
* information to be passed to the signal handler, we don't provide
* that much currently, should use siginfo.
*/
err |= __put_user(signr, &si->siginfo.signo);
err |= __put_user(SVR4_SINOINFO, &si->siginfo.code);
if (err)
goto sigsegv;
regs->u_regs[UREG_FP] = (unsigned long) sfp;
regs->tpc = (unsigned long) sa->sa_handler;
regs->tnpc = (regs->tpc + 4);
if (test_thread_flag(TIF_32BIT)) {
regs->tpc &= 0xffffffff;
regs->tnpc &= 0xffffffff;
}
/* Arguments passed to signal handler */
if (regs->u_regs[14]){
struct reg_window32 __user *rw = (struct reg_window32 __user *)
(regs->u_regs[14] & 0x00000000ffffffffUL);
err |= __put_user(signr, &rw->ins[0]);
err |= __put_user((u64)si, &rw->ins[1]);
err |= __put_user((u64)uc, &rw->ins[2]);
err |= __put_user((u64)sfp, &rw->ins[6]); /* frame pointer */
if (err)
goto sigsegv;
regs->u_regs[UREG_I0] = signr;
regs->u_regs[UREG_I1] = (u32)(u64) si;
regs->u_regs[UREG_I2] = (u32)(u64) uc;
}
return;
sigsegv:
force_sigsegv(signr, current);
}
asmlinkage int
svr4_getcontext(svr4_ucontext_t __user *uc, struct pt_regs *regs)
{
svr4_gregset_t __user *gr;
svr4_mcontext_t __user *mc;
svr4_sigset_t setv;
int i, err;
u32 psr;
synchronize_user_stack();
save_and_clear_fpu();
if (get_thread_wsaved())
do_exit(SIGSEGV);
err = clear_user(uc, sizeof(*uc));
/* Setup convenience variables */
mc = &uc->mcontext;
gr = &mc->greg;
setv.sigbits[0] = current->blocked.sig[0];
setv.sigbits[1] = (current->blocked.sig[0] >> 32);
if (_NSIG_WORDS >= 2) {
setv.sigbits[2] = current->blocked.sig[1];
setv.sigbits[3] = (current->blocked.sig[1] >> 32);
err |= __copy_to_user(&uc->sigmask, &setv, sizeof(svr4_sigset_t));
} else
err |= __copy_to_user(&uc->sigmask, &setv, 2 * sizeof(unsigned));
/* Store registers */
if (test_thread_flag(TIF_32BIT)) {
regs->tpc &= 0xffffffff;
regs->tnpc &= 0xffffffff;
}
err |= __put_user(regs->tpc, &uc->mcontext.greg[SVR4_PC]);
err |= __put_user(regs->tnpc, &uc->mcontext.greg[SVR4_NPC]);
psr = tstate_to_psr(regs->tstate) & ~PSR_EF;
if (current_thread_info()->fpsaved[0] & FPRS_FEF)
psr |= PSR_EF;
err |= __put_user(psr, &uc->mcontext.greg[SVR4_PSR]);
err |= __put_user(regs->y, &uc->mcontext.greg[SVR4_Y]);
/* Copy g[1..7] and o[0..7] registers */
for (i = 0; i < 7; i++)
err |= __put_user(regs->u_regs[UREG_G1+i], (&(*gr)[SVR4_G1])+i);
for (i = 0; i < 8; i++)
err |= __put_user(regs->u_regs[UREG_I0+i], (&(*gr)[SVR4_O0])+i);
/* Setup sigaltstack */
err |= __put_user(current->sas_ss_sp, &uc->stack.sp);
err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &uc->stack.flags);
err |= __put_user(current->sas_ss_size, &uc->stack.size);
/* The register file is not saved
* we have already stuffed all of it with sync_user_stack
*/
return (err ? -EFAULT : 0);
}
/* Set the context for a svr4 application, this is Solaris way to sigreturn */
asmlinkage int svr4_setcontext(svr4_ucontext_t __user *c, struct pt_regs *regs)
{
svr4_gregset_t __user *gr;
mm_segment_t old_fs;
u32 pc, npc, psr, u_ss_sp;
sigset_t set;
svr4_sigset_t setv;
int i, err;
stack_t st;
/* Fixme: restore windows, or is this already taken care of in
* svr4_setup_frame when sync_user_windows is done?
*/
flush_user_windows();
if (get_thread_wsaved())
goto sigsegv;
if (((unsigned long) c) & 3){
printk("Unaligned structure passed\n");
goto sigsegv;
}
if (!__access_ok(c, sizeof(*c))) {
/* Miguel, add nice debugging msg _here_. ;-) */
goto sigsegv;
}
/* Check for valid PC and nPC */
gr = &c->mcontext.greg;
err = __get_user(pc, &((*gr)[SVR4_PC]));
err |= __get_user(npc, &((*gr)[SVR4_NPC]));
if ((pc | npc) & 3)
goto sigsegv;
/* Retrieve information from passed ucontext */
/* note that nPC is ored a 1, this is used to inform entry.S */
/* that we don't want it to mess with our PC and nPC */
err |= copy_from_user(&setv, &c->sigmask, sizeof(svr4_sigset_t));
set.sig[0] = setv.sigbits[0] | (((long)setv.sigbits[1]) << 32);
if (_NSIG_WORDS >= 2)
set.sig[1] = setv.sigbits[2] | (((long)setv.sigbits[3]) << 32);
err |= __get_user(u_ss_sp, &c->stack.sp);
st.ss_sp = compat_ptr(u_ss_sp);
err |= __get_user(st.ss_flags, &c->stack.flags);
err |= __get_user(st.ss_size, &c->stack.size);
if (err)
goto sigsegv;
/* It is more difficult to avoid calling this function than to
call it and ignore errors. */
old_fs = get_fs();
set_fs(KERNEL_DS);
do_sigaltstack((stack_t __user *) &st, NULL, regs->u_regs[UREG_I6]);
set_fs(old_fs);
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(&current->sighand->siglock);
current->blocked = set;
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
regs->tpc = pc;
regs->tnpc = npc | 1;
if (test_thread_flag(TIF_32BIT)) {
regs->tpc &= 0xffffffff;
regs->tnpc &= 0xffffffff;
}
err |= __get_user(regs->y, &((*gr)[SVR4_Y]));
err |= __get_user(psr, &((*gr)[SVR4_PSR]));
regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
regs->tstate |= psr_to_tstate_icc(psr);
/* Restore g[1..7] and o[0..7] registers */
for (i = 0; i < 7; i++)
err |= __get_user(regs->u_regs[UREG_G1+i], (&(*gr)[SVR4_G1])+i);
for (i = 0; i < 8; i++)
err |= __get_user(regs->u_regs[UREG_I0+i], (&(*gr)[SVR4_O0])+i);
if (err)
goto sigsegv;
return -EINTR;
sigsegv:
return -EFAULT;
}
static void setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs,
unsigned long signr, sigset_t *oldset,
siginfo_t *info)
{
struct rt_signal_frame32 __user *sf;
int sigframe_size;
u32 psr;
int i, err;
compat_sigset_t seta;
/* 1. Make sure everything is clean */
synchronize_user_stack();
save_and_clear_fpu();
sigframe_size = RT_ALIGNEDSZ;
if (!(current_thread_info()->fpsaved[0] & FPRS_FEF))
sigframe_size -= sizeof(__siginfo_fpu_t);
sf = (struct rt_signal_frame32 __user *)
get_sigframe(&ka->sa, regs, sigframe_size);
if (invalid_frame_pointer(sf, sigframe_size))
goto sigill;
if (get_thread_wsaved() != 0)
goto sigill;
/* 2. Save the current process state */
if (test_thread_flag(TIF_32BIT)) {
regs->tpc &= 0xffffffff;
regs->tnpc &= 0xffffffff;
}
err = put_user(regs->tpc, &sf->regs.pc);
err |= __put_user(regs->tnpc, &sf->regs.npc);
err |= __put_user(regs->y, &sf->regs.y);
psr = tstate_to_psr(regs->tstate);
if (current_thread_info()->fpsaved[0] & FPRS_FEF)
psr |= PSR_EF;
err |= __put_user(psr, &sf->regs.psr);
for (i = 0; i < 16; i++)
err |= __put_user(regs->u_regs[i], &sf->regs.u_regs[i]);
err |= __put_user(sizeof(siginfo_extra_v8plus_t), &sf->extra_size);
err |= __put_user(SIGINFO_EXTRA_V8PLUS_MAGIC, &sf->v8plus.g_upper[0]);
for (i = 1; i < 16; i++)
err |= __put_user(((u32 *)regs->u_regs)[2*i],
&sf->v8plus.g_upper[i]);
err |= __put_user((regs->tstate & TSTATE_ASI) >> 24UL,
&sf->v8plus.asi);
if (psr & PSR_EF) {
err |= save_fpu_state32(regs, &sf->fpu_state);
err |= __put_user((u64)&sf->fpu_state, &sf->fpu_save);
} else {
err |= __put_user(0, &sf->fpu_save);
}
/* Update the siginfo structure. */
err |= copy_siginfo_to_user32(&sf->info, info);
/* Setup sigaltstack */
err |= __put_user(current->sas_ss_sp, &sf->stack.ss_sp);
err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &sf->stack.ss_flags);
err |= __put_user(current->sas_ss_size, &sf->stack.ss_size);
switch (_NSIG_WORDS) {
case 4: seta.sig[7] = (oldset->sig[3] >> 32);
seta.sig[6] = oldset->sig[3];
case 3: seta.sig[5] = (oldset->sig[2] >> 32);
seta.sig[4] = oldset->sig[2];
case 2: seta.sig[3] = (oldset->sig[1] >> 32);
seta.sig[2] = oldset->sig[1];
case 1: seta.sig[1] = (oldset->sig[0] >> 32);
seta.sig[0] = oldset->sig[0];
}
err |= __copy_to_user(&sf->mask, &seta, sizeof(compat_sigset_t));
err |= copy_in_user((u32 __user *)sf,
(u32 __user *)(regs->u_regs[UREG_FP]),
sizeof(struct reg_window32));
if (err)
goto sigsegv;
/* 3. signal handler back-trampoline and parameters */
regs->u_regs[UREG_FP] = (unsigned long) sf;
regs->u_regs[UREG_I0] = signr;
regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
regs->u_regs[UREG_I2] = (unsigned long) &sf->regs;
/* 4. signal handler */
regs->tpc = (unsigned long) ka->sa.sa_handler;
regs->tnpc = (regs->tpc + 4);
if (test_thread_flag(TIF_32BIT)) {
regs->tpc &= 0xffffffff;
regs->tnpc &= 0xffffffff;
}
/* 5. return to kernel instructions */
if (ka->ka_restorer)
regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
else {
/* Flush instruction space. */
unsigned long address = ((unsigned long)&(sf->insns[0]));
pgd_t *pgdp = pgd_offset(current->mm, address);
pud_t *pudp = pud_offset(pgdp, address);
pmd_t *pmdp = pmd_offset(pudp, address);
pte_t *ptep;
regs->u_regs[UREG_I7] = (unsigned long) (&(sf->insns[0]) - 2);
/* mov __NR_rt_sigreturn, %g1 */
err |= __put_user(0x82102065, &sf->insns[0]);
/* t 0x10 */
err |= __put_user(0x91d02010, &sf->insns[1]);
if (err)
goto sigsegv;
preempt_disable();
ptep = pte_offset_map(pmdp, address);
if (pte_present(*ptep)) {
unsigned long page = (unsigned long)
page_address(pte_page(*ptep));
__asm__ __volatile__(
" membar #StoreStore\n"
" flush %0 + %1"
: : "r" (page), "r" (address & (PAGE_SIZE - 1))
: "memory");
}
pte_unmap(ptep);
preempt_enable();
}
return;
sigill:
do_exit(SIGILL);
sigsegv:
force_sigsegv(signr, current);
}
static inline void handle_signal32(unsigned long signr, struct k_sigaction *ka,
siginfo_t *info,
sigset_t *oldset, struct pt_regs *regs,
int svr4_signal)
{
if (svr4_signal)
setup_svr4_frame32(&ka->sa, regs->tpc, regs->tnpc,
regs, signr, oldset);
else {
if (ka->sa.sa_flags & SA_SIGINFO)
setup_rt_frame32(ka, regs, signr, oldset, info);
else if (test_thread_flag(TIF_NEWSIGNALS))
new_setup_frame32(ka, regs, signr, oldset);
else
setup_frame32(&ka->sa, regs, signr, oldset, info);
}
spin_lock_irq(&current->sighand->siglock);
sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
if (!(ka->sa.sa_flags & SA_NOMASK))
sigaddset(&current->blocked,signr);
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
}
static inline void syscall_restart32(unsigned long orig_i0, struct pt_regs *regs,
struct sigaction *sa)
{
switch (regs->u_regs[UREG_I0]) {
case ERESTART_RESTARTBLOCK:
case ERESTARTNOHAND:
no_system_call_restart:
regs->u_regs[UREG_I0] = EINTR;
regs->tstate |= TSTATE_ICARRY;
break;
case ERESTARTSYS:
if (!(sa->sa_flags & SA_RESTART))
goto no_system_call_restart;
/* fallthrough */
case ERESTARTNOINTR:
regs->u_regs[UREG_I0] = orig_i0;
regs->tpc -= 4;
regs->tnpc -= 4;
}
}
/* Note that 'init' is a special process: it doesn't get signals it doesn't
* want to handle. Thus you cannot kill init even with a SIGKILL even by
* mistake.
*/
int do_signal32(sigset_t *oldset, struct pt_regs * regs,
unsigned long orig_i0, int restart_syscall)
{
siginfo_t info;
struct signal_deliver_cookie cookie;
struct k_sigaction ka;
int signr;
int svr4_signal = current->personality == PER_SVR4;
cookie.restart_syscall = restart_syscall;
cookie.orig_i0 = orig_i0;
signr = get_signal_to_deliver(&info, &ka, regs, &cookie);
if (signr > 0) {
if (cookie.restart_syscall)
syscall_restart32(orig_i0, regs, &ka.sa);
handle_signal32(signr, &ka, &info, oldset,
regs, svr4_signal);
return 1;
}
if (cookie.restart_syscall &&
(regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
regs->u_regs[UREG_I0] == ERESTARTSYS ||
regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
/* replay the system call when we are done */
regs->u_regs[UREG_I0] = cookie.orig_i0;
regs->tpc -= 4;
regs->tnpc -= 4;
}
if (cookie.restart_syscall &&
regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) {
regs->u_regs[UREG_G1] = __NR_restart_syscall;
regs->tpc -= 4;
regs->tnpc -= 4;
}
return 0;
}
struct sigstack32 {
u32 the_stack;
int cur_status;
};
asmlinkage int do_sys32_sigstack(u32 u_ssptr, u32 u_ossptr, unsigned long sp)
{
struct sigstack32 __user *ssptr =
(struct sigstack32 __user *)((unsigned long)(u_ssptr));
struct sigstack32 __user *ossptr =
(struct sigstack32 __user *)((unsigned long)(u_ossptr));
int ret = -EFAULT;
/* First see if old state is wanted. */
if (ossptr) {
if (put_user(current->sas_ss_sp + current->sas_ss_size,
&ossptr->the_stack) ||
__put_user(on_sig_stack(sp), &ossptr->cur_status))
goto out;
}
/* Now see if we want to update the new state. */
if (ssptr) {
u32 ss_sp;
if (get_user(ss_sp, &ssptr->the_stack))
goto out;
/* If the current stack was set with sigaltstack, don't
* swap stacks while we are on it.
*/
ret = -EPERM;
if (current->sas_ss_sp && on_sig_stack(sp))
goto out;
/* Since we don't know the extent of the stack, and we don't
* track onstack-ness, but rather calculate it, we must
* presume a size. Ho hum this interface is lossy.
*/
current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
current->sas_ss_size = SIGSTKSZ;
}
ret = 0;
out:
return ret;
}
asmlinkage long do_sys32_sigaltstack(u32 ussa, u32 uossa, unsigned long sp)
{
stack_t uss, uoss;
u32 u_ss_sp = 0;
int ret;
mm_segment_t old_fs;
stack_t32 __user *uss32 = compat_ptr(ussa);
stack_t32 __user *uoss32 = compat_ptr(uossa);
if (ussa && (get_user(u_ss_sp, &uss32->ss_sp) ||
__get_user(uss.ss_flags, &uss32->ss_flags) ||
__get_user(uss.ss_size, &uss32->ss_size)))
return -EFAULT;
uss.ss_sp = compat_ptr(u_ss_sp);
old_fs = get_fs();
set_fs(KERNEL_DS);
ret = do_sigaltstack(ussa ? (stack_t __user *) &uss : NULL,
uossa ? (stack_t __user *) &uoss : NULL, sp);
set_fs(old_fs);
if (!ret && uossa && (put_user(ptr_to_compat(uoss.ss_sp), &uoss32->ss_sp) ||
__put_user(uoss.ss_flags, &uoss32->ss_flags) ||
__put_user(uoss.ss_size, &uoss32->ss_size)))
return -EFAULT;
return ret;
}
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