Skip to content

Commit

Permalink
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
Browse files Browse the repository at this point in the history 
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc: video drivers: add facility level
  sparc: tcx.c make tcx_init and tcx_exit static
  sparc: ffb.c make ffb_init and ffb_exit static
  sparc: cg14.c make cg14_init and cg15_exit static
  sparc: bw2.c fix bw2_exit
  sparc64: Fix accidental syscall restart on child return from clone/fork/vfork.
  sparc64: Clean up handling of pt_regs trap type encoding.
  sparc: Remove old style signal frame support.
  sparc64: Kill bogus RT_ALIGNEDSZ macro from signal.c
  sparc: sunzilog.c remove unused argument
  sparc: fix drivers/video/tcx.c warning
  sparc64: Kill unused local ISA bus layer.
  input: Rewrite sparcspkr device probing.
  sparc64: Do not ignore 'pmu' device ranges.
  sparc64: Kill ISA_FLOPPY_WORKS code.
  sparc64: Kill CONFIG_SPARC32_COMPAT
  sparc64: Cleanups and corrections for arch/sparc64/Kconfig
  sparc64: Fix wedged irq regression.
  • Loading branch information
@torvalds
torvalds committed Apr 28, 2008
2 parents 77a50df + 194f1a6 commit e945e84
Show file tree
Hide file tree
Showing 32 changed files with 318 additions and 1,061 deletions.
2 changes: 0 additions & 2 deletions arch/sparc/kernel/process.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -357,8 +357,6 @@ void flush_thread(void)
{
current_thread_info()->w_saved = 0;

/* No new signal delivery by default */
current->thread.new_signal = 0;
#ifndef CONFIG_SMP
if(last_task_used_math == current) {
#else
Expand Down
260 changes: 20 additions & 240 deletions arch/sparc/kernel/signal.c
View file
Original file line number Diff line number Diff line change
@@ -1,5 +1,4 @@
/* $Id: signal.c,v 1.110 2002/02/08 03:57:14 davem Exp $
* linux/arch/sparc/kernel/signal.c
/* linux/arch/sparc/kernel/signal.c
*
* Copyright (C) 1991, 1992 Linus Torvalds
* Copyright (C) 1995 David S. Miller ([email protected])
Expand Down Expand Up @@ -32,37 +31,7 @@ extern void fpsave(unsigned long *fpregs, unsigned long *fsr,
void *fpqueue, unsigned long *fpqdepth);
extern void fpload(unsigned long *fpregs, unsigned long *fsr);

/* 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_sframe {
struct reg_window sig_window;
int sig_num;
int sig_code;
struct sigcontext __user *sig_scptr;
int sig_address;
struct sigcontext sig_context;
unsigned int extramask[_NSIG_WORDS - 1];
};

/*
* 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_frame {
struct signal_frame {
struct sparc_stackf ss;
__siginfo_t info;
__siginfo_fpu_t __user *fpu_save;
Expand All @@ -85,8 +54,7 @@ struct rt_signal_frame {
};

/* Align macros */
#define SF_ALIGNEDSZ (((sizeof(struct signal_sframe) + 7) & (~7)))
#define NF_ALIGNEDSZ (((sizeof(struct new_signal_frame) + 7) & (~7)))
#define SF_ALIGNEDSZ (((sizeof(struct signal_frame) + 7) & (~7)))
#define RT_ALIGNEDSZ (((sizeof(struct rt_signal_frame) + 7) & (~7)))

static int _sigpause_common(old_sigset_t set)
Expand Down Expand Up @@ -141,15 +109,20 @@ restore_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
return err;
}

static inline void do_new_sigreturn (struct pt_regs *regs)
asmlinkage void do_sigreturn(struct pt_regs *regs)
{
struct new_signal_frame __user *sf;
struct signal_frame __user *sf;
unsigned long up_psr, pc, npc;
sigset_t set;
__siginfo_fpu_t __user *fpu_save;
int err;

sf = (struct new_signal_frame __user *) regs->u_regs[UREG_FP];
/* Always make any pending restarted system calls return -EINTR */
current_thread_info()->restart_block.fn = do_no_restart_syscall;

synchronize_user_stack();

sf = (struct signal_frame __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)))
Expand Down Expand Up @@ -198,73 +171,6 @@ static inline void do_new_sigreturn (struct pt_regs *regs)
force_sig(SIGSEGV, current);
}

asmlinkage void do_sigreturn(struct pt_regs *regs)
{
struct sigcontext __user *scptr;
unsigned long pc, npc, psr;
sigset_t set;
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 (current->thread.new_signal) {
do_new_sigreturn(regs);
return;
}

scptr = (struct sigcontext __user *) regs->u_regs[UREG_I0];

/* Check sanity of the user arg. */
if (!access_ok(VERIFY_READ, scptr, sizeof(struct sigcontext)) ||
(((unsigned long) scptr) & 3))
goto segv_and_exit;

err = __get_user(pc, &scptr->sigc_pc);
err |= __get_user(npc, &scptr->sigc_npc);

if ((pc | npc) & 3)
goto segv_and_exit;

/* This is pretty much atomic, no amount locking would prevent
* the races which exist anyways.
*/
err |= __get_user(set.sig[0], &scptr->sigc_mask);
/* Note that scptr + 1 points to extramask */
err |= __copy_from_user(&set.sig[1], scptr + 1,
(_NSIG_WORDS - 1) * sizeof(unsigned int));

if (err)
goto segv_and_exit;

sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(&current->sighand->siglock);
current->blocked = set;
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);

regs->pc = pc;
regs->npc = 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 %psr. */
err |= __get_user(psr, &scptr->sigc_psr);
if (err)
goto segv_and_exit;

regs->psr &= ~(PSR_ICC);
regs->psr |= (psr & PSR_ICC);
return;

segv_and_exit:
force_sig(SIGSEGV, current);
}

asmlinkage void do_rt_sigreturn(struct pt_regs *regs)
{
struct rt_signal_frame __user *sf;
Expand Down Expand Up @@ -351,128 +257,6 @@ static inline void __user *get_sigframe(struct sigaction *sa, struct pt_regs *re
return (void __user *)(sp - framesize);
}

static inline void
setup_frame(struct sigaction *sa, struct pt_regs *regs, int signr, sigset_t *oldset, siginfo_t *info)
{
struct signal_sframe __user *sframep;
struct sigcontext __user *sc;
int window = 0, err;
unsigned long pc = regs->pc;
unsigned long npc = regs->npc;
struct thread_info *tp = current_thread_info();
void __user *sig_address;
int sig_code;

synchronize_user_stack();
sframep = (struct signal_sframe __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.
*/
goto sigill_and_return;
}

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);
err |= __put_user(oldset->sig[0], &sc->sigc_mask);
err |= __copy_to_user(sframep->extramask, &oldset->sig[1],
(_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);
err |= __put_user(regs->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(tp->w_saved, &sc->sigc_oswins);
if (tp->w_saved)
for (window = 0; window < tp->w_saved; window++) {
put_user((char *)tp->rwbuf_stkptrs[window],
&sc->sigc_spbuf[window]);
err |= __copy_to_user(&sc->sigc_wbuf[window],
&tp->reg_window[window],
sizeof(struct reg_window));
}
else
err |= __copy_to_user(sframep, (char *) regs->u_regs[UREG_FP],
sizeof(struct reg_window));

tp->w_saved = 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)) {
sig_code = info->si_trapno;
break;
}
default:
sig_address = NULL;
}
}
err |= __put_user((unsigned long)sig_address, &sframep->sig_address);
err |= __put_user(sig_code, &sframep->sig_code);
err |= __put_user(sc, &sframep->sig_scptr);
if (err)
goto sigsegv;

regs->u_regs[UREG_FP] = (unsigned long) sframep;
regs->pc = (unsigned long) sa->sa_handler;
regs->npc = (regs->pc + 4);
return;

sigill_and_return:
do_exit(SIGILL);
sigsegv:
force_sigsegv(signr, current);
}


static inline int
save_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
{
Expand Down Expand Up @@ -508,21 +292,20 @@ save_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
return err;
}

static inline void
new_setup_frame(struct k_sigaction *ka, struct pt_regs *regs,
int signo, sigset_t *oldset)
static void setup_frame(struct k_sigaction *ka, struct pt_regs *regs,
int signo, sigset_t *oldset)
{
struct new_signal_frame __user *sf;
struct signal_frame __user *sf;
int sigframe_size, err;

/* 1. Make sure everything is clean */
synchronize_user_stack();

sigframe_size = NF_ALIGNEDSZ;
sigframe_size = SF_ALIGNEDSZ;
if (!used_math())
sigframe_size -= sizeof(__siginfo_fpu_t);

sf = (struct new_signal_frame __user *)
sf = (struct signal_frame __user *)
get_sigframe(&ka->sa, regs, sigframe_size);

if (invalid_frame_pointer(sf, sigframe_size))
Expand Down Expand Up @@ -586,9 +369,8 @@ new_setup_frame(struct k_sigaction *ka, struct pt_regs *regs,
force_sigsegv(signo, current);
}

static inline void
new_setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
int signo, sigset_t *oldset, siginfo_t *info)
static void setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
int signo, sigset_t *oldset, siginfo_t *info)
{
struct rt_signal_frame __user *sf;
int sigframe_size;
Expand Down Expand Up @@ -674,11 +456,9 @@ handle_signal(unsigned long signr, struct k_sigaction *ka,
siginfo_t *info, sigset_t *oldset, struct pt_regs *regs)
{
if (ka->sa.sa_flags & SA_SIGINFO)
new_setup_rt_frame(ka, regs, signr, oldset, info);
else if (current->thread.new_signal)
new_setup_frame(ka, regs, signr, oldset);
setup_rt_frame(ka, regs, signr, oldset, info);
else
setup_frame(&ka->sa, regs, signr, oldset, info);
setup_frame(ka, regs, signr, oldset);

spin_lock_irq(&current->sighand->siglock);
sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
Expand Down
14 changes: 3 additions & 11 deletions arch/sparc/kernel/sys_sparc.c
View file
Original file line number Diff line number Diff line change
@@ -1,5 +1,4 @@
/* $Id: sys_sparc.c,v 1.70 2001/04/14 01:12:02 davem Exp $
* linux/arch/sparc/kernel/sys_sparc.c
/* linux/arch/sparc/kernel/sys_sparc.c
*
* This file contains various random system calls that
* have a non-standard calling sequence on the Linux/sparc
Expand Down Expand Up @@ -395,10 +394,8 @@ sparc_sigaction (int sig, const struct old_sigaction __user *act,
struct k_sigaction new_ka, old_ka;
int ret;

if (sig < 0) {
current->thread.new_signal = 1;
sig = -sig;
}
WARN_ON_ONCE(sig >= 0);
sig = -sig;

if (act) {
unsigned long mask;
Expand Down Expand Up @@ -446,11 +443,6 @@ sys_rt_sigaction(int sig,
if (sigsetsize != sizeof(sigset_t))
return -EINVAL;

/* All tasks which use RT signals (effectively) use
* new style signals.
*/
current->thread.new_signal = 1;

if (act) {
new_ka.ka_restorer = restorer;
if (copy_from_user(&new_ka.sa, act, sizeof(*act)))
Expand Down
Loading

0 comments on commit e945e84

Please sign in to comment.