#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
+#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/user.h>
#include <linux/a.out.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/module.h>
+#include <linux/prctl.h>
#include <linux/delay.h>
#include <linux/kprobes.h>
#include <asm/kdebug.h>
-#ifdef CONFIG_PPC32
-#include <linux/ptrace.h>
-#include <linux/prctl.h>
-#endif
#include <asm/pgtable.h>
#include <asm/uaccess.h>
#include <asm/pmc.h>
#endif
-#ifdef CONFIG_PPC64
-#define __KPROBES __kprobes
-#else
-#define __KPROBES
-#endif
-
#ifdef CONFIG_DEBUGGER
int (*__debugger)(struct pt_regs *regs);
int (*__debugger_ipi)(struct pt_regs *regs);
console_verbose();
spin_lock_irq(&die_lock);
bust_spinlocks(1);
-#if defined(CONFIG_PPC32) && defined(CONFIG_PMAC_BACKLIGHT)
+#ifdef CONFIG_PMAC_BACKLIGHT
if (_machine == _MACH_Pmac) {
set_backlight_enable(1);
set_backlight_level(BACKLIGHT_MAX);
#endif
panic("Fatal exception");
}
-#ifdef CONFIG_PPC32
do_exit(err);
-#else
- do_exit(SIGSEGV);
-#endif
return 0;
}
info.si_addr = (void __user *) addr;
force_sig_info(signr, &info, current);
-#ifdef CONFIG_PPC32
/*
* Init gets no signals that it doesn't have a handler for.
* That's all very well, but if it has caused a synchronous
do_exit(signr);
}
}
-#endif
}
#ifdef CONFIG_PPC64
if (ppc_md.system_reset_exception)
ppc_md.system_reset_exception(regs);
- die("System Reset", regs, 0);
+ die("System Reset", regs, SIGABRT);
/* Must die if the interrupt is not recoverable */
if (!(regs->msr & MSR_RI))
}
#endif
-#ifdef CONFIG_PPC32
/*
* I/O accesses can cause machine checks on powermacs.
* Check if the NIP corresponds to the address of a sync
#endif /* CONFIG_PPC_PMAC */
return 0;
}
-#endif /* CONFIG_PPC32 */
#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
#define clear_single_step(regs) ((regs)->msr &= ~MSR_SE)
#endif
-#ifdef CONFIG_PPC32
/*
* This is "fall-back" implementation for configurations
* which don't provide platform-specific machine check info
platform_machine_check(struct pt_regs *regs)
{
}
-#endif
void machine_check_exception(struct pt_regs *regs)
{
if (debugger_fault_handler(regs))
return;
- die("Machine check", regs,
-#ifdef CONFIG_PPC32
- SIGBUS
-#else
- 0
-#endif
- );
+ die("Machine check", regs, SIGBUS);
/* Must die if the interrupt is not recoverable */
if (!(regs->msr & MSR_RI))
}
#endif
-void __KPROBES single_step_exception(struct pt_regs *regs)
+void __kprobes single_step_exception(struct pt_regs *regs)
{
-#ifdef CONFIG_PPC32
regs->msr &= ~(MSR_SE | MSR_BE); /* Turn off 'trace' bits */
-#else
- regs->msr &= ~MSR_SE; /* Turn off 'trace' bit */
-#endif
if (notify_die(DIE_SSTEP, "single_step", regs, 5,
5, SIGTRAP) == NOTIFY_STOP)
* pretend we got a single-step exception. This was pointed out
* by Kumar Gala. -- paulus
*/
-static inline void emulate_single_step(struct pt_regs *regs)
+static void emulate_single_step(struct pt_regs *regs)
{
if (single_stepping(regs)) {
-#ifdef CONFIG_PPC32
clear_single_step(regs);
_exception(SIGTRAP, regs, TRAP_TRACE, 0);
-#else
single_step_exception(regs);
-#endif
}
}
int code = 0;
unsigned long fpscr;
-#ifdef CONFIG_PPC32
- /* We must make sure the FP state is consistent with
- * our MSR_FP in regs
- */
- preempt_disable();
- if (regs->msr & MSR_FP)
- giveup_fpu(current);
- preempt_enable();
-#else
flush_fp_to_thread(current);
-#endif
fpscr = current->thread.fpscr;
}
/* Emulating the dcba insn is just a no-op. */
- if ((instword & INST_DCBA_MASK) == INST_DCBA) {
-#ifdef CONFIG_PPC64
- static int warned;
-
- if (!warned) {
- printk(KERN_WARNING
- "process %d (%s) uses obsolete 'dcba' insn\n",
- current->pid, current->comm);
- warned = 1;
- }
-#endif /* CONFIG_PPC64 */
+ if ((instword & INST_DCBA_MASK) == INST_DCBA)
return 0;
- }
/* Emulate the mcrxr insn. */
if ((instword & INST_MCRXR_MASK) == INST_MCRXR) {
return 0;
if (bug->line & BUG_WARNING_TRAP) {
/* this is a WARN_ON rather than BUG/BUG_ON */
-#if defined(CONFIG_PPC32) && defined(CONFIG_XMON)
+#ifdef CONFIG_XMON
xmon_printf(KERN_ERR "Badness in %s at %s:%d\n",
bug->function, bug->file,
bug->line & ~BUG_WARNING_TRAP);
return 0;
}
-void __KPROBES program_check_exception(struct pt_regs *regs)
+void __kprobes program_check_exception(struct pt_regs *regs)
{
unsigned int reason = get_reason(regs);
-#if defined(CONFIG_PPC32) && defined(CONFIG_MATH_EMULATION)
extern int do_mathemu(struct pt_regs *regs);
+#ifdef CONFIG_MATH_EMULATION
/* (reason & REASON_ILLEGAL) would be the obvious thing here,
* but there seems to be a hardware bug on the 405GP (RevD)
* that means ESR is sometimes set incorrectly - either to
emulate_single_step(regs);
return;
}
-#endif
-
-#ifdef CONFIG_PPC64
- if (debugger_fault_handler(regs))
- return;
-#endif
+#endif /* CONFIG_MATH_EMULATION */
if (reason & REASON_FP) {
/* IEEE FP exception */
parse_fpe(regs);
- } else if (reason & REASON_TRAP) {
+ return;
+ }
+ if (reason & REASON_TRAP) {
/* trap exception */
-#ifdef CONFIG_PPC64
if (notify_die(DIE_BPT, "breakpoint", regs, 5, 5, SIGTRAP)
== NOTIFY_STOP)
return;
-#endif
if (debugger_bpt(regs))
return;
if (check_bug_trap(regs)) {
regs->nip += 4;
return;
}
- _exception(SIGTRAP, regs, TRAP_BRKPT,
-#ifdef CONFIG_PPC32
- 0
-#else
- regs->nip
-#endif
- );
- } else
-#ifdef CONFIG_PPC32
- if (reason & (REASON_ILLEGAL | REASON_PRIVILEGED))
-#endif
- {
- /* Privileged or illegal instruction; try to emulate it. */
+ _exception(SIGTRAP, regs, TRAP_BRKPT, regs->nip);
+ return;
+ }
+
+ /* Try to emulate it if we should. */
+ if (reason & (REASON_ILLEGAL | REASON_PRIVILEGED)) {
switch (emulate_instruction(regs)) {
case 0:
regs->nip += 4;
emulate_single_step(regs);
- break;
+ return;
case -EFAULT:
_exception(SIGSEGV, regs, SEGV_MAPERR, regs->nip);
- break;
- default:
- if (reason & REASON_PRIVILEGED)
- _exception(SIGILL, regs, ILL_PRVOPC, regs->nip);
- else
- _exception(SIGILL, regs, ILL_ILLOPC, regs->nip);
- break;
+ return;
}
}
+
+ if (reason & REASON_PRIVILEGED)
+ _exception(SIGILL, regs, ILL_PRVOPC, regs->nip);
+ else
+ _exception(SIGILL, regs, ILL_ILLOPC, regs->nip);
}
void alignment_exception(struct pt_regs *regs)
/* Operand address was bad */
if (fixed == -EFAULT) {
if (user_mode(regs))
- _exception(SIGSEGV, regs,
-#ifdef CONFIG_PPC32
- SEGV_ACCERR,
-#else
- SEGV_MAPERR,
-#endif
- regs->dar);
+ _exception(SIGSEGV, regs, SEGV_ACCERR, regs->dar);
else
/* Search exception table */
bad_page_fault(regs, regs->dar, SIGSEGV);
return;
}
- _exception(SIGBUS, regs, BUS_ADRALN,
-#ifdef CONFIG_PPC32
- regs->dar
-#else
- regs->nip
-#endif
- );
+ _exception(SIGBUS, regs, BUS_ADRALN, regs->dar);
}
#ifdef CONFIG_PPC32
}
#endif /* CONFIG_PPC32 */
-#ifdef CONFIG_PPC64
void kernel_fp_unavailable_exception(struct pt_regs *regs)
{
printk(KERN_EMERG "Unrecoverable FP Unavailable Exception "
"%lx at %lx\n", regs->trap, regs->nip);
die("Unrecoverable FP Unavailable Exception", regs, SIGABRT);
}
-#endif
void altivec_unavailable_exception(struct pt_regs *regs)
{
-#if !defined(CONFIG_ALTIVEC) || defined(CONFIG_PPC64)
+#if !defined(CONFIG_ALTIVEC)
if (user_mode(regs)) {
/* A user program has executed an altivec instruction,
but this kernel doesn't support altivec. */
return;
}
#endif
-#ifdef CONFIG_PPC32
- {
- static int kernel_altivec_count;
-
- /* The kernel has executed an altivec instruction without
- first enabling altivec. Whinge but let it do it. */
- if (++kernel_altivec_count < 10)
- printk(KERN_ERR "AltiVec used in kernel (task=%p, pc=%lx)\n",
- current, regs->nip);
- regs->msr |= MSR_VEC;
- }
-#else
printk(KERN_EMERG "Unrecoverable VMX/Altivec Unavailable Exception "
"%lx at %lx\n", regs->trap, regs->nip);
die("Unrecoverable VMX/Altivec Unavailable Exception", regs, SIGABRT);
-#endif
}
#ifdef CONFIG_PPC64
}
#endif
-
-#if defined(CONFIG_PPC32) && defined(CONFIG_8xx)
+#ifdef CONFIG_8xx
void SoftwareEmulation(struct pt_regs *regs)
{
extern int do_mathemu(struct pt_regs *);
} else
emulate_single_step(regs);
}
-#endif /* defined(CONFIG_PPC32) && defined(CONFIG_8xx) */
+#endif /* CONFIG_8xx */
#ifdef CONFIG_PPC32
#if defined(CONFIG_40x) || defined(CONFIG_BOOKE)
void altivec_assist_exception(struct pt_regs *regs)
{
int err;
-#ifdef CONFIG_PPC64
- siginfo_t info;
-#endif
-#ifdef CONFIG_PPC32
- preempt_disable();
- if (regs->msr & MSR_VEC)
- giveup_altivec(current);
- preempt_enable();
-#endif
if (!user_mode(regs)) {
printk(KERN_EMERG "VMX/Altivec assist exception in kernel mode"
" at %lx\n", regs->nip);
- die("Kernel "
-#ifdef CONFIG_PPC64
- "VMX/"
-#endif
- "Altivec assist exception", regs, SIGILL);
+ die("Kernel VMX/Altivec assist exception", regs, SIGILL);
}
-#ifdef CONFIG_PPC64
flush_altivec_to_thread(current);
-#endif /* CONFIG_PPC64 */
err = emulate_altivec(regs);
if (err == 0) {
if (err == -EFAULT) {
/* got an error reading the instruction */
-#ifdef CONFIG_PPC32
_exception(SIGSEGV, regs, SEGV_ACCERR, regs->nip);
-#else
- info.si_signo = SIGSEGV;
- info.si_errno = 0;
- info.si_code = SEGV_MAPERR;
- info.si_addr = (void __user *) regs->nip;
- force_sig_info(SIGSEGV, &info, current);
-#endif
} else {
/* didn't recognize the instruction */
/* XXX quick hack for now: set the non-Java bit in the VSCR */
}
#endif /* CONFIG_ALTIVEC */
-#ifdef CONFIG_PPC32
#ifdef CONFIG_FSL_BOOKE
void CacheLockingException(struct pt_regs *regs, unsigned long address,
unsigned long error_code)
return;
}
#endif
-#endif /* CONFIG_PPC32 */
-#ifdef CONFIG_PPC64
/*
* We enter here if we get an unrecoverable exception, that is, one
* that happened at a point where the RI (recoverable interrupt) bit
regs->trap, regs->nip);
die("Unrecoverable exception", regs, SIGABRT);
}
-#endif /* CONFIG_PPC64 */
-#ifdef CONFIG_PPC32
#ifdef CONFIG_BOOKE_WDT
/*
* Default handler for a Watchdog exception,
WatchdogHandler(regs);
}
#endif
-#endif /* CONFIG_PPC32 */
-#ifdef CONFIG_PPC64
/*
* We enter here if we discover during exception entry that we are
* running in supervisor mode with a userspace value in the stack pointer.
regs->gpr[1], regs->nip);
die("Bad kernel stack pointer", regs, SIGABRT);
}
-#endif
void __init trap_init(void)
{
projects / linux-2.6 / commitdiff