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alistair23-linux/arch/ia64/kernel/traps.c
Greg Kroah-Hartman b24413180f License cleanup: add SPDX GPL-2.0 license identifier to files with no license 
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.

By default all files without license information are under the default
license of the kernel, which is GPL version 2.

Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier.  The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.

This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.

How this work was done:

Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
 - file had no licensing information it it.
 - file was a */uapi/* one with no licensing information in it,
 - file was a */uapi/* one with existing licensing information,

Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.

The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne.  Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.

The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed.  Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.

Criteria used to select files for SPDX license identifier tagging was:
 - Files considered eligible had to be source code files.
 - Make and config files were included as candidates if they contained >5
   lines of source
 - File already had some variant of a license header in it (even if <5
   lines).

All documentation files were explicitly excluded.

The following heuristics were used to determine which SPDX license
identifiers to apply.

 - when both scanners couldn't find any license traces, file was
   considered to have no license information in it, and the top level
   COPYING file license applied.

   For non */uapi/* files that summary was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0                                              11139

   and resulted in the first patch in this series.

   If that file was a */uapi/* path one, it was "GPL-2.0 WITH
   Linux-syscall-note" otherwise it was "GPL-2.0".  Results of that was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0 WITH Linux-syscall-note                        930

   and resulted in the second patch in this series.

 - if a file had some form of licensing information in it, and was one
   of the */uapi/* ones, it was denoted with the Linux-syscall-note if
   any GPL family license was found in the file or had no licensing in
   it (per prior point).  Results summary:

   SPDX license identifier                            # files
   ---------------------------------------------------|------
   GPL-2.0 WITH Linux-syscall-note                       270
   GPL-2.0+ WITH Linux-syscall-note                      169
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause)    21
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)    17
   LGPL-2.1+ WITH Linux-syscall-note                      15
   GPL-1.0+ WITH Linux-syscall-note                       14
   ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause)    5
   LGPL-2.0+ WITH Linux-syscall-note                       4
   LGPL-2.1 WITH Linux-syscall-note                        3
   ((GPL-2.0 WITH Linux-syscall-note) OR MIT)              3
   ((GPL-2.0 WITH Linux-syscall-note) AND MIT)             1

   and that resulted in the third patch in this series.

 - when the two scanners agreed on the detected license(s), that became
   the concluded license(s).

 - when there was disagreement between the two scanners (one detected a
   license but the other didn't, or they both detected different
   licenses) a manual inspection of the file occurred.

 - In most cases a manual inspection of the information in the file
   resulted in a clear resolution of the license that should apply (and
   which scanner probably needed to revisit its heuristics).

 - When it was not immediately clear, the license identifier was
   confirmed with lawyers working with the Linux Foundation.

 - If there was any question as to the appropriate license identifier,
   the file was flagged for further research and to be revisited later
   in time.

In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.

Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights.  The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.

Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.

In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.

Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
 - a full scancode scan run, collecting the matched texts, detected
   license ids and scores
 - reviewing anything where there was a license detected (about 500+
   files) to ensure that the applied SPDX license was correct
 - reviewing anything where there was no detection but the patch license
   was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
   SPDX license was correct

This produced a worksheet with 20 files needing minor correction.  This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.

These .csv files were then reviewed by Greg.  Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected.  This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.)  Finally Greg ran the script using the .csv files to
generate the patches.

Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-02 11:10:55 +01:00

658 lines
17 KiB
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// SPDX-License-Identifier: GPL-2.0
/*
* Architecture-specific trap handling.
*
* Copyright (C) 1998-2003 Hewlett-Packard Co
* David Mosberger-Tang <davidm@hpl.hp.com>
*
* 05/12/00 grao <goutham.rao@intel.com> : added isr in siginfo for SIGFPE
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/sched/signal.h>
#include <linux/sched/debug.h>
#include <linux/tty.h>
#include <linux/vt_kern.h> /* For unblank_screen() */
#include <linux/export.h>
#include <linux/extable.h>
#include <linux/hardirq.h>
#include <linux/kprobes.h>
#include <linux/delay.h> /* for ssleep() */
#include <linux/kdebug.h>
#include <linux/uaccess.h>
#include <asm/fpswa.h>
#include <asm/intrinsics.h>
#include <asm/processor.h>
#include <asm/exception.h>
#include <asm/setup.h>
fpswa_interface_t *fpswa_interface;
EXPORT_SYMBOL(fpswa_interface);
void __init
trap_init (void)
{
if (ia64_boot_param->fpswa)
/* FPSWA fixup: make the interface pointer a kernel virtual address: */
fpswa_interface = __va(ia64_boot_param->fpswa);
}
int
die (const char *str, struct pt_regs *regs, long err)
{
static struct {
spinlock_t lock;
u32 lock_owner;
int lock_owner_depth;
} die = {
.lock = __SPIN_LOCK_UNLOCKED(die.lock),
.lock_owner = -1,
.lock_owner_depth = 0
};
static int die_counter;
int cpu = get_cpu();
if (die.lock_owner != cpu) {
console_verbose();
spin_lock_irq(&die.lock);
die.lock_owner = cpu;
die.lock_owner_depth = 0;
bust_spinlocks(1);
}
put_cpu();
if (++die.lock_owner_depth < 3) {
printk("%s[%d]: %s %ld [%d]\n",
current->comm, task_pid_nr(current), str, err, ++die_counter);
if (notify_die(DIE_OOPS, str, regs, err, 255, SIGSEGV)
!= NOTIFY_STOP)
show_regs(regs);
else
regs = NULL;
} else
printk(KERN_ERR "Recursive die() failure, output suppressed\n");
bust_spinlocks(0);
die.lock_owner = -1;
add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE);
spin_unlock_irq(&die.lock);
if (!regs)
return 1;
if (panic_on_oops)
panic("Fatal exception");
do_exit(SIGSEGV);
return 0;
}
int
die_if_kernel (char *str, struct pt_regs *regs, long err)
{
if (!user_mode(regs))
return die(str, regs, err);
return 0;
}
void
__kprobes ia64_bad_break (unsigned long break_num, struct pt_regs *regs)
{
siginfo_t siginfo;
int sig, code;
/* SIGILL, SIGFPE, SIGSEGV, and SIGBUS want these field initialized: */
siginfo.si_addr = (void __user *) (regs->cr_iip + ia64_psr(regs)->ri);
siginfo.si_imm = break_num;
siginfo.si_flags = 0; /* clear __ISR_VALID */
siginfo.si_isr = 0;
switch (break_num) {
case 0: /* unknown error (used by GCC for __builtin_abort()) */
if (notify_die(DIE_BREAK, "break 0", regs, break_num, TRAP_BRKPT, SIGTRAP)
== NOTIFY_STOP)
return;
if (die_if_kernel("bugcheck!", regs, break_num))
return;
sig = SIGILL; code = ILL_ILLOPC;
break;
case 1: /* integer divide by zero */
sig = SIGFPE; code = FPE_INTDIV;
break;
case 2: /* integer overflow */
sig = SIGFPE; code = FPE_INTOVF;
break;
case 3: /* range check/bounds check */
sig = SIGFPE; code = FPE_FLTSUB;
break;
case 4: /* null pointer dereference */
sig = SIGSEGV; code = SEGV_MAPERR;
break;
case 5: /* misaligned data */
sig = SIGSEGV; code = BUS_ADRALN;
break;
case 6: /* decimal overflow */
sig = SIGFPE; code = __FPE_DECOVF;
break;
case 7: /* decimal divide by zero */
sig = SIGFPE; code = __FPE_DECDIV;
break;
case 8: /* packed decimal error */
sig = SIGFPE; code = __FPE_DECERR;
break;
case 9: /* invalid ASCII digit */
sig = SIGFPE; code = __FPE_INVASC;
break;
case 10: /* invalid decimal digit */
sig = SIGFPE; code = __FPE_INVDEC;
break;
case 11: /* paragraph stack overflow */
sig = SIGSEGV; code = __SEGV_PSTKOVF;
break;
case 0x3f000 ... 0x3ffff: /* bundle-update in progress */
sig = SIGILL; code = __ILL_BNDMOD;
break;
default:
if ((break_num < 0x40000 || break_num > 0x100000)
&& die_if_kernel("Bad break", regs, break_num))
return;
if (break_num < 0x80000) {
sig = SIGILL; code = __ILL_BREAK;
} else {
if (notify_die(DIE_BREAK, "bad break", regs, break_num, TRAP_BRKPT, SIGTRAP)
== NOTIFY_STOP)
return;
sig = SIGTRAP; code = TRAP_BRKPT;
}
}
siginfo.si_signo = sig;
siginfo.si_errno = 0;
siginfo.si_code = code;
force_sig_info(sig, &siginfo, current);
}
/*
* disabled_fph_fault() is called when a user-level process attempts to access f32..f127
* and it doesn't own the fp-high register partition. When this happens, we save the
* current fph partition in the task_struct of the fpu-owner (if necessary) and then load
* the fp-high partition of the current task (if necessary). Note that the kernel has
* access to fph by the time we get here, as the IVT's "Disabled FP-Register" handler takes
* care of clearing psr.dfh.
*/
static inline void
disabled_fph_fault (struct pt_regs *regs)
{
struct ia64_psr *psr = ia64_psr(regs);
/* first, grant user-level access to fph partition: */
psr->dfh = 0;
/*
* Make sure that no other task gets in on this processor
* while we're claiming the FPU
*/
preempt_disable();
#ifndef CONFIG_SMP
{
struct task_struct *fpu_owner
= (struct task_struct *)ia64_get_kr(IA64_KR_FPU_OWNER);
if (ia64_is_local_fpu_owner(current)) {
preempt_enable_no_resched();
return;
}
if (fpu_owner)
ia64_flush_fph(fpu_owner);
}
#endif /* !CONFIG_SMP */
ia64_set_local_fpu_owner(current);
if ((current->thread.flags & IA64_THREAD_FPH_VALID) != 0) {
__ia64_load_fpu(current->thread.fph);
psr->mfh = 0;
} else {
__ia64_init_fpu();
/*
* Set mfh because the state in thread.fph does not match the state in
* the fph partition.
*/
psr->mfh = 1;
}
preempt_enable_no_resched();
}
static inline int
fp_emulate (int fp_fault, void *bundle, long *ipsr, long *fpsr, long *isr, long *pr, long *ifs,
struct pt_regs *regs)
{
fp_state_t fp_state;
fpswa_ret_t ret;
if (!fpswa_interface)
return -1;
memset(&fp_state, 0, sizeof(fp_state_t));
/*
* compute fp_state. only FP registers f6 - f11 are used by the
* kernel, so set those bits in the mask and set the low volatile
* pointer to point to these registers.
*/
fp_state.bitmask_low64 = 0xfc0; /* bit6..bit11 */
fp_state.fp_state_low_volatile = (fp_state_low_volatile_t *) &regs->f6;
/*
* unsigned long (*EFI_FPSWA) (
* unsigned long trap_type,
* void *Bundle,
* unsigned long *pipsr,
* unsigned long *pfsr,
* unsigned long *pisr,
* unsigned long *ppreds,
* unsigned long *pifs,
* void *fp_state);
*/
ret = (*fpswa_interface->fpswa)((unsigned long) fp_fault, bundle,
(unsigned long *) ipsr, (unsigned long *) fpsr,
(unsigned long *) isr, (unsigned long *) pr,
(unsigned long *) ifs, &fp_state);
return ret.status;
}
struct fpu_swa_msg {
unsigned long count;
unsigned long time;
};
static DEFINE_PER_CPU(struct fpu_swa_msg, cpulast);
DECLARE_PER_CPU(struct fpu_swa_msg, cpulast);
static struct fpu_swa_msg last __cacheline_aligned;
/*
* Handle floating-point assist faults and traps.
*/
static int
handle_fpu_swa (int fp_fault, struct pt_regs *regs, unsigned long isr)
{
long exception, bundle[2];
unsigned long fault_ip;
struct siginfo siginfo;
fault_ip = regs->cr_iip;
if (!fp_fault && (ia64_psr(regs)->ri == 0))
fault_ip -= 16;
if (copy_from_user(bundle, (void __user *) fault_ip, sizeof(bundle)))
return -1;
if (!(current->thread.flags & IA64_THREAD_FPEMU_NOPRINT)) {
unsigned long count, current_jiffies = jiffies;
struct fpu_swa_msg *cp = this_cpu_ptr(&cpulast);
if (unlikely(current_jiffies > cp->time))
cp->count = 0;
if (unlikely(cp->count < 5)) {
cp->count++;
cp->time = current_jiffies + 5 * HZ;
/* minimize races by grabbing a copy of count BEFORE checking last.time. */
count = last.count;
barrier();
/*
* Lower 4 bits are used as a count. Upper bits are a sequence
* number that is updated when count is reset. The cmpxchg will
* fail is seqno has changed. This minimizes mutiple cpus
* resetting the count.
*/
if (current_jiffies > last.time)
(void) cmpxchg_acq(&last.count, count, 16 + (count & ~15));
/* used fetchadd to atomically update the count */
if ((last.count & 15) < 5 && (ia64_fetchadd(1, &last.count, acq) & 15) < 5) {
last.time = current_jiffies + 5 * HZ;
printk(KERN_WARNING
"%s(%d): floating-point assist fault at ip %016lx, isr %016lx\n",
current->comm, task_pid_nr(current), regs->cr_iip + ia64_psr(regs)->ri, isr);
}
}
}
exception = fp_emulate(fp_fault, bundle, &regs->cr_ipsr, &regs->ar_fpsr, &isr, &regs->pr,
&regs->cr_ifs, regs);
if (fp_fault) {
if (exception == 0) {
/* emulation was successful */
ia64_increment_ip(regs);
} else if (exception == -1) {
printk(KERN_ERR "handle_fpu_swa: fp_emulate() returned -1\n");
return -1;
} else {
/* is next instruction a trap? */
if (exception & 2) {
ia64_increment_ip(regs);
}
siginfo.si_signo = SIGFPE;
siginfo.si_errno = 0;
siginfo.si_code = FPE_FIXME; /* default code */
siginfo.si_addr = (void __user *) (regs->cr_iip + ia64_psr(regs)->ri);
if (isr & 0x11) {
siginfo.si_code = FPE_FLTINV;
} else if (isr & 0x22) {
/* denormal operand gets the same si_code as underflow
* see arch/i386/kernel/traps.c:math_error() */
siginfo.si_code = FPE_FLTUND;
} else if (isr & 0x44) {
siginfo.si_code = FPE_FLTDIV;
}
siginfo.si_isr = isr;
siginfo.si_flags = __ISR_VALID;
siginfo.si_imm = 0;
force_sig_info(SIGFPE, &siginfo, current);
}
} else {
if (exception == -1) {
printk(KERN_ERR "handle_fpu_swa: fp_emulate() returned -1\n");
return -1;
} else if (exception != 0) {
/* raise exception */
siginfo.si_signo = SIGFPE;
siginfo.si_errno = 0;
siginfo.si_code = FPE_FIXME; /* default code */
siginfo.si_addr = (void __user *) (regs->cr_iip + ia64_psr(regs)->ri);
if (isr & 0x880) {
siginfo.si_code = FPE_FLTOVF;
} else if (isr & 0x1100) {
siginfo.si_code = FPE_FLTUND;
} else if (isr & 0x2200) {
siginfo.si_code = FPE_FLTRES;
}
siginfo.si_isr = isr;
siginfo.si_flags = __ISR_VALID;
siginfo.si_imm = 0;
force_sig_info(SIGFPE, &siginfo, current);
}
}
return 0;
}
struct illegal_op_return {
unsigned long fkt, arg1, arg2, arg3;
};
struct illegal_op_return
ia64_illegal_op_fault (unsigned long ec, long arg1, long arg2, long arg3,
long arg4, long arg5, long arg6, long arg7,
struct pt_regs regs)
{
struct illegal_op_return rv;
struct siginfo si;
char buf[128];
#ifdef CONFIG_IA64_BRL_EMU
{
extern struct illegal_op_return ia64_emulate_brl (struct pt_regs *, unsigned long);
rv = ia64_emulate_brl(&regs, ec);
if (rv.fkt != (unsigned long) -1)
return rv;
}
#endif
sprintf(buf, "IA-64 Illegal operation fault");
rv.fkt = 0;
if (die_if_kernel(buf, &regs, 0))
return rv;
memset(&si, 0, sizeof(si));
si.si_signo = SIGILL;
si.si_code = ILL_ILLOPC;
si.si_addr = (void __user *) (regs.cr_iip + ia64_psr(&regs)->ri);
force_sig_info(SIGILL, &si, current);
return rv;
}
void __kprobes
ia64_fault (unsigned long vector, unsigned long isr, unsigned long ifa,
unsigned long iim, unsigned long itir, long arg5, long arg6,
long arg7, struct pt_regs regs)
{
unsigned long code, error = isr, iip;
struct siginfo siginfo;
char buf[128];
int result, sig;
static const char *reason[] = {
"IA-64 Illegal Operation fault",
"IA-64 Privileged Operation fault",
"IA-64 Privileged Register fault",
"IA-64 Reserved Register/Field fault",
"Disabled Instruction Set Transition fault",
"Unknown fault 5", "Unknown fault 6", "Unknown fault 7", "Illegal Hazard fault",
"Unknown fault 9", "Unknown fault 10", "Unknown fault 11", "Unknown fault 12",
"Unknown fault 13", "Unknown fault 14", "Unknown fault 15"
};
if ((isr & IA64_ISR_NA) && ((isr & IA64_ISR_CODE_MASK) == IA64_ISR_CODE_LFETCH)) {
/*
* This fault was due to lfetch.fault, set "ed" bit in the psr to cancel
* the lfetch.
*/
ia64_psr(&regs)->ed = 1;
return;
}
iip = regs.cr_iip + ia64_psr(&regs)->ri;
switch (vector) {
case 24: /* General Exception */
code = (isr >> 4) & 0xf;
sprintf(buf, "General Exception: %s%s", reason[code],
(code == 3) ? ((isr & (1UL << 37))
? " (RSE access)" : " (data access)") : "");
if (code == 8) {
# ifdef CONFIG_IA64_PRINT_HAZARDS
printk("%s[%d]: possible hazard @ ip=%016lx (pr = %016lx)\n",
current->comm, task_pid_nr(current),
regs.cr_iip + ia64_psr(&regs)->ri, regs.pr);
# endif
return;
}
break;
case 25: /* Disabled FP-Register */
if (isr & 2) {
disabled_fph_fault(&regs);
return;
}
sprintf(buf, "Disabled FPL fault---not supposed to happen!");
break;
case 26: /* NaT Consumption */
if (user_mode(&regs)) {
void __user *addr;
if (((isr >> 4) & 0xf) == 2) {
/* NaT page consumption */
sig = SIGSEGV;
code = SEGV_ACCERR;
addr = (void __user *) ifa;
} else {
/* register NaT consumption */
sig = SIGILL;
code = ILL_ILLOPN;
addr = (void __user *) (regs.cr_iip
+ ia64_psr(&regs)->ri);
}
siginfo.si_signo = sig;
siginfo.si_code = code;
siginfo.si_errno = 0;
siginfo.si_addr = addr;
siginfo.si_imm = vector;
siginfo.si_flags = __ISR_VALID;
siginfo.si_isr = isr;
force_sig_info(sig, &siginfo, current);
return;
} else if (ia64_done_with_exception(&regs))
return;
sprintf(buf, "NaT consumption");
break;
case 31: /* Unsupported Data Reference */
if (user_mode(&regs)) {
siginfo.si_signo = SIGILL;
siginfo.si_code = ILL_ILLOPN;
siginfo.si_errno = 0;
siginfo.si_addr = (void __user *) iip;
siginfo.si_imm = vector;
siginfo.si_flags = __ISR_VALID;
siginfo.si_isr = isr;
force_sig_info(SIGILL, &siginfo, current);
return;
}
sprintf(buf, "Unsupported data reference");
break;
case 29: /* Debug */
case 35: /* Taken Branch Trap */
case 36: /* Single Step Trap */
if (fsys_mode(current, &regs)) {
extern char __kernel_syscall_via_break[];
/*
* Got a trap in fsys-mode: Taken Branch Trap
* and Single Step trap need special handling;
* Debug trap is ignored (we disable it here
* and re-enable it in the lower-privilege trap).
*/
if (unlikely(vector == 29)) {
set_thread_flag(TIF_DB_DISABLED);
ia64_psr(&regs)->db = 0;
ia64_psr(&regs)->lp = 1;
return;
}
/* re-do the system call via break 0x100000: */
regs.cr_iip = (unsigned long) __kernel_syscall_via_break;
ia64_psr(&regs)->ri = 0;
ia64_psr(&regs)->cpl = 3;
return;
}
switch (vector) {
default:
case 29:
siginfo.si_code = TRAP_HWBKPT;
#ifdef CONFIG_ITANIUM
/*
* Erratum 10 (IFA may contain incorrect address) now has
* "NoFix" status. There are no plans for fixing this.
*/
if (ia64_psr(&regs)->is == 0)
ifa = regs.cr_iip;
#endif
break;
case 35: siginfo.si_code = TRAP_BRANCH; ifa = 0; break;
case 36: siginfo.si_code = TRAP_TRACE; ifa = 0; break;
}
if (notify_die(DIE_FAULT, "ia64_fault", &regs, vector, siginfo.si_code, SIGTRAP)
== NOTIFY_STOP)
return;
siginfo.si_signo = SIGTRAP;
siginfo.si_errno = 0;
siginfo.si_addr = (void __user *) ifa;
siginfo.si_imm = 0;
siginfo.si_flags = __ISR_VALID;
siginfo.si_isr = isr;
force_sig_info(SIGTRAP, &siginfo, current);
return;
case 32: /* fp fault */
case 33: /* fp trap */
result = handle_fpu_swa((vector == 32) ? 1 : 0, &regs, isr);
if ((result < 0) || (current->thread.flags & IA64_THREAD_FPEMU_SIGFPE)) {
siginfo.si_signo = SIGFPE;
siginfo.si_errno = 0;
siginfo.si_code = FPE_FLTINV;
siginfo.si_addr = (void __user *) iip;
siginfo.si_flags = __ISR_VALID;
siginfo.si_isr = isr;
siginfo.si_imm = 0;
force_sig_info(SIGFPE, &siginfo, current);
}
return;
case 34:
if (isr & 0x2) {
/* Lower-Privilege Transfer Trap */
/* If we disabled debug traps during an fsyscall,
* re-enable them here.
*/
if (test_thread_flag(TIF_DB_DISABLED)) {
clear_thread_flag(TIF_DB_DISABLED);
ia64_psr(&regs)->db = 1;
}
/*
* Just clear PSR.lp and then return immediately:
* all the interesting work (e.g., signal delivery)
* is done in the kernel exit path.
*/
ia64_psr(&regs)->lp = 0;
return;
} else {
/* Unimplemented Instr. Address Trap */
if (user_mode(&regs)) {
siginfo.si_signo = SIGILL;
siginfo.si_code = ILL_BADIADDR;
siginfo.si_errno = 0;
siginfo.si_flags = 0;
siginfo.si_isr = 0;
siginfo.si_imm = 0;
siginfo.si_addr = (void __user *) iip;
force_sig_info(SIGILL, &siginfo, current);
return;
}
sprintf(buf, "Unimplemented Instruction Address fault");
}
break;
case 45:
printk(KERN_ERR "Unexpected IA-32 exception (Trap 45)\n");
printk(KERN_ERR " iip - 0x%lx, ifa - 0x%lx, isr - 0x%lx\n",
iip, ifa, isr);
force_sig(SIGSEGV, current);
return;
case 46:
printk(KERN_ERR "Unexpected IA-32 intercept trap (Trap 46)\n");
printk(KERN_ERR " iip - 0x%lx, ifa - 0x%lx, isr - 0x%lx, iim - 0x%lx\n",
iip, ifa, isr, iim);
force_sig(SIGSEGV, current);
return;
case 47:
sprintf(buf, "IA-32 Interruption Fault (int 0x%lx)", isr >> 16);
break;
default:
sprintf(buf, "Fault %lu", vector);
break;
}
if (!die_if_kernel(buf, &regs, error))
force_sig(SIGILL, current);
}
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