Commit a618a275 authored by Eric W. Biederman's avatar Eric W. Biederman
Browse files

signal/ia64: Use force_sig_fault where appropriate 



Acked-by: default avatarTony Luck <tony.luck@intel.com>
Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
parent b92adb74

arch/ia64/kernel/brl_emu.c

+6 −25
Original line number Diff line number Diff line
@@ -58,11 +58,9 @@ ia64_emulate_brl (struct pt_regs *regs, unsigned long ar_ec) 
	unsigned long bundle[2];

	unsigned long opcode, btype, qp, offset, cpl;

	unsigned long next_ip;

	struct siginfo siginfo;

	struct illegal_op_return rv;

	long tmp_taken, unimplemented_address;



	clear_siginfo(&siginfo);

	rv.fkt = (unsigned long) -1;



	/*
@@ -198,39 +196,22 @@ ia64_emulate_brl (struct pt_regs *regs, unsigned long ar_ec) 
		 *  The target address contains unimplemented bits.

		 */

		printk(KERN_DEBUG "Woah! Unimplemented Instruction Address Trap!\n");

		siginfo.si_signo = SIGILL;

		siginfo.si_errno = 0;

		siginfo.si_flags = 0;

		siginfo.si_isr = 0;

		siginfo.si_imm = 0;

		siginfo.si_code = ILL_BADIADDR;

		force_sig_info(SIGILL, &siginfo, current);

		force_sig_fault(SIGILL, ILL_BADIADDR, (void __user *)NULL,

				0, 0, 0, current);

	} else if (ia64_psr(regs)->tb) {

		/*

		 *  Branch Tracing is enabled.

		 *  Force a taken branch signal.

		 */

		siginfo.si_signo = SIGTRAP;

		siginfo.si_errno = 0;

		siginfo.si_code = TRAP_BRANCH;

		siginfo.si_flags = 0;

		siginfo.si_isr = 0;

		siginfo.si_addr = 0;

		siginfo.si_imm = 0;

		force_sig_info(SIGTRAP, &siginfo, current);

		force_sig_fault(SIGTRAP, TRAP_BRANCH, (void __user *)NULL,

				0, 0, 0, current);

	} else if (ia64_psr(regs)->ss) {

		/*

		 *  Single Step is enabled.

		 *  Force a trace signal.

		 */

		siginfo.si_signo = SIGTRAP;

		siginfo.si_errno = 0;

		siginfo.si_code = TRAP_TRACE;

		siginfo.si_flags = 0;

		siginfo.si_isr = 0;

		siginfo.si_addr = 0;

		siginfo.si_imm = 0;

		force_sig_info(SIGTRAP, &siginfo, current);

		force_sig_fault(SIGTRAP, TRAP_TRACE, (void __user *)NULL,

				0, 0, 0, current);

	}

	return rv;

}

arch/ia64/kernel/traps.c

+39 −105
Original line number Diff line number Diff line
@@ -100,16 +100,8 @@ die_if_kernel (char *str, struct pt_regs *regs, long err) 
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: */

	clear_siginfo(&siginfo);

	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)
@@ -182,10 +174,9 @@ __kprobes ia64_bad_break (unsigned long break_num, struct pt_regs *regs) 
			sig = SIGTRAP; code = TRAP_BRKPT;

		}

	}

	siginfo.si_signo = sig;

	siginfo.si_errno = 0;

	siginfo.si_code = code;

	force_sig_info(sig, &siginfo, current);

	force_sig_fault(sig, code,

			(void __user *) (regs->cr_iip + ia64_psr(regs)->ri),

			break_num, 0 /* clear __ISR_VALID */, 0, current);

}



/*
@@ -344,30 +335,25 @@ handle_fpu_swa (int fp_fault, struct pt_regs *regs, unsigned long isr) 
			printk(KERN_ERR "handle_fpu_swa: fp_emulate() returned -1\n");

			return -1;

		} else {

			struct siginfo siginfo;



			/* is next instruction a trap? */

			int si_code;



			if (exception & 2) {

				ia64_increment_ip(regs);

			}

			clear_siginfo(&siginfo);

			siginfo.si_signo = SIGFPE;

			siginfo.si_errno = 0;

			siginfo.si_code = FPE_FLTUNK;	/* default code */

			siginfo.si_addr = (void __user *) (regs->cr_iip + ia64_psr(regs)->ri);

			si_code = FPE_FLTUNK;	/* default code */

			if (isr & 0x11) {

				siginfo.si_code = FPE_FLTINV;

				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;

				si_code = FPE_FLTUND;

			} else if (isr & 0x44) {

				siginfo.si_code = FPE_FLTDIV;

				si_code = FPE_FLTDIV;

			}

			siginfo.si_isr = isr;

			siginfo.si_flags = __ISR_VALID;

			siginfo.si_imm = 0;

			force_sig_info(SIGFPE, &siginfo, current);

			force_sig_fault(SIGFPE, si_code,

					(void __user *) (regs->cr_iip + ia64_psr(regs)->ri),

					0, __ISR_VALID, isr, current);

		}

	} else {

		if (exception == -1) {
@@ -375,24 +361,19 @@ handle_fpu_swa (int fp_fault, struct pt_regs *regs, unsigned long isr) 
			return -1;

		} else if (exception != 0) {

			/* raise exception */

			struct siginfo siginfo;

			int si_code;



			clear_siginfo(&siginfo);

			siginfo.si_signo = SIGFPE;

			siginfo.si_errno = 0;

			siginfo.si_code = FPE_FLTUNK;	/* default code */

			siginfo.si_addr = (void __user *) (regs->cr_iip + ia64_psr(regs)->ri);

			si_code = FPE_FLTUNK;	/* default code */

			if (isr & 0x880) {

				siginfo.si_code = FPE_FLTOVF;

				si_code = FPE_FLTOVF;

			} else if (isr & 0x1100) {

				siginfo.si_code = FPE_FLTUND;

				si_code = FPE_FLTUND;

			} else if (isr & 0x2200) {

				siginfo.si_code = FPE_FLTRES;

				si_code = FPE_FLTRES;

			}

			siginfo.si_isr = isr;

			siginfo.si_flags = __ISR_VALID;

			siginfo.si_imm = 0;

			force_sig_info(SIGFPE, &siginfo, current);

			force_sig_fault(SIGFPE, si_code,

					(void __user *) (regs->cr_iip + ia64_psr(regs)->ri),

					0, __ISR_VALID, isr, current);

		}

	}

	return 0;
@@ -408,7 +389,6 @@ ia64_illegal_op_fault (unsigned long ec, long arg1, long arg2, long arg3, 
		       struct pt_regs regs)

{

	struct illegal_op_return rv;

	struct siginfo si;

	char buf[128];



#ifdef CONFIG_IA64_BRL_EMU
@@ -426,11 +406,9 @@ ia64_illegal_op_fault (unsigned long ec, long arg1, long arg2, long arg3, 
	if (die_if_kernel(buf, &regs, 0))

		return rv;



	clear_siginfo(&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);

	force_sig_fault(SIGILL, ILL_ILLOPC,

			(void __user *) (regs.cr_iip + ia64_psr(&regs)->ri),

			0, 0, 0, current);

	return rv;

}
@@ -441,7 +419,7 @@ ia64_fault (unsigned long vector, unsigned long isr, unsigned long ifa, 
{

	unsigned long code, error = isr, iip;

	char buf[128];

	int result, sig;

	int result, sig, si_code;

	static const char *reason[] = {

		"IA-64 Illegal Operation fault",

		"IA-64 Privileged Operation fault",
@@ -490,7 +468,6 @@ ia64_fault (unsigned long vector, unsigned long isr, unsigned long ifa, 


	      case 26: /* NaT Consumption */

		if (user_mode(&regs)) {

			struct siginfo siginfo;

			void __user *addr;



			if (((isr >> 4) & 0xf) == 2) {
@@ -505,15 +482,8 @@ ia64_fault (unsigned long vector, unsigned long isr, unsigned long ifa, 
				addr = (void __user *) (regs.cr_iip

							+ ia64_psr(&regs)->ri);

			}

			clear_siginfo(&siginfo);

			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);

			force_sig_fault(sig, code, addr,

					vector, __ISR_VALID, isr, current);

			return;

		} else if (ia64_done_with_exception(&regs))

			return;
@@ -522,17 +492,8 @@ ia64_fault (unsigned long vector, unsigned long isr, unsigned long ifa, 


	      case 31: /* Unsupported Data Reference */

		if (user_mode(&regs)) {

			struct siginfo siginfo;



			clear_siginfo(&siginfo);

			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);

			force_sig_fault(SIGILL, ILL_ILLOPN, (void __user *) iip,

					vector, __ISR_VALID, isr, current);

			return;

		}

		sprintf(buf, "Unsupported data reference");
@@ -541,10 +502,6 @@ ia64_fault (unsigned long vector, unsigned long isr, unsigned long ifa, 
	      case 29: /* Debug */

	      case 35: /* Taken Branch Trap */

	      case 36: /* Single Step Trap */

	      {

		struct siginfo siginfo;



		clear_siginfo(&siginfo);

		if (fsys_mode(current, &regs)) {

			extern char __kernel_syscall_via_break[];

			/*
@@ -568,7 +525,7 @@ ia64_fault (unsigned long vector, unsigned long isr, unsigned long ifa, 
		switch (vector) {

		      default:

		      case 29:

			siginfo.si_code = TRAP_HWBKPT;

			si_code = TRAP_HWBKPT;

#ifdef CONFIG_ITANIUM

			/*

			 * Erratum 10 (IFA may contain incorrect address) now has
@@ -578,37 +535,22 @@ ia64_fault (unsigned long vector, unsigned long isr, unsigned long ifa, 
			  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;

		      case 35: si_code = TRAP_BRANCH; ifa = 0; break;

		      case 36: si_code = TRAP_TRACE; ifa = 0; break;

		}

		if (notify_die(DIE_FAULT, "ia64_fault", &regs, vector, siginfo.si_code, SIGTRAP)

		if (notify_die(DIE_FAULT, "ia64_fault", &regs, vector, 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);

		force_sig_fault(SIGTRAP, si_code, (void __user *) ifa,

				0, __ISR_VALID, isr, 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)) {

			struct siginfo siginfo;



			clear_siginfo(&siginfo);

			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);

			force_sig_fault(SIGFPE, FPE_FLTINV, (void __user *) iip,

					0, __ISR_VALID, isr, current);

		}

		return;
@@ -634,17 +576,9 @@ ia64_fault (unsigned long vector, unsigned long isr, unsigned long ifa, 
		} else {

			/* Unimplemented Instr. Address Trap */

			if (user_mode(&regs)) {

				struct siginfo siginfo;



				clear_siginfo(&siginfo);

				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);

				force_sig_fault(SIGILL, ILL_BADIADDR,

						(void __user *) iip,

						0, 0, 0, current);

				return;

			}

			sprintf(buf, "Unimplemented Instruction Address fault");

arch/ia64/kernel/unaligned.c

+2 −10
Original line number Diff line number Diff line
@@ -1298,7 +1298,6 @@ ia64_handle_unaligned (unsigned long ifa, struct pt_regs *regs) 
	mm_segment_t old_fs = get_fs();

	unsigned long bundle[2];

	unsigned long opcode;

	struct siginfo si;

	const struct exception_table_entry *eh = NULL;

	union {

		unsigned long l;
@@ -1537,14 +1536,7 @@ ia64_handle_unaligned (unsigned long ifa, struct pt_regs *regs) 
		/* NOT_REACHED */

	}

  force_sigbus:

	clear_siginfo(&si);

	si.si_signo = SIGBUS;

	si.si_errno = 0;

	si.si_code = BUS_ADRALN;

	si.si_addr = (void __user *) ifa;

	si.si_flags = 0;

	si.si_isr = 0;

	si.si_imm = 0;

	force_sig_info(SIGBUS, &si, current);

	force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *) ifa,

			0, 0, 0, current);

	goto done;

}

arch/ia64/mm/fault.c

+2 −10
Original line number Diff line number Diff line
@@ -248,16 +248,8 @@ retry: 
		return;

	}

	if (user_mode(regs)) {

		struct siginfo si;



		clear_siginfo(&si);

		si.si_signo = signal;

		si.si_errno = 0;

		si.si_code = code;

		si.si_addr = (void __user *) address;

		si.si_isr = isr;

		si.si_flags = __ISR_VALID;

		force_sig_info(signal, &si, current);

		force_sig_fault(signal, code, (void __user *) address,

				0, __ISR_VALID, isr, current);

		return;

	}

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