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Commit 6e7726e1 authored by David S. Miller's avatar David S. Miller
Browse files

[SPARC64]: Call do_mathemu on illegal instruction traps too. 



To add this logic, put the VIS instruction check at the
vis_emul() call site instead of inside of vis_emul().

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 042cf50c

arch/sparc64/kernel/traps.c

+15 −3
Original line number Diff line number Diff line
@@ -2261,8 +2261,12 @@ void die_if_kernel(char *str, struct pt_regs *regs) 
	do_exit(SIGSEGV);

}



#define VIS_OPCODE_MASK	((0x3 << 30) | (0x3f << 19))

#define VIS_OPCODE_VAL	((0x2 << 30) | (0x36 << 19))



extern int handle_popc(u32 insn, struct pt_regs *regs);

extern int handle_ldf_stq(u32 insn, struct pt_regs *regs);

extern int vis_emul(struct pt_regs *, unsigned int);



void do_illegal_instruction(struct pt_regs *regs)

{
@@ -2287,10 +2291,18 @@ void do_illegal_instruction(struct pt_regs *regs) 
			if (handle_ldf_stq(insn, regs))

				return;

		} else if (tlb_type == hypervisor) {

			extern int vis_emul(struct pt_regs *, unsigned int);



			if ((insn & VIS_OPCODE_MASK) == VIS_OPCODE_VAL) {

				if (!vis_emul(regs, insn))

					return;

			} else {

				struct fpustate *f = FPUSTATE;



				/* XXX maybe verify XFSR bits like

				 * XXX do_fpother() does?

				 */

				if (do_mathemu(regs, f))

					return;

			}

		}

	}

	info.si_signo = SIGILL;

arch/sparc64/kernel/visemul.c

+0 −6
Original line number Diff line number Diff line
@@ -128,9 +128,6 @@ 
/* 001001100 - Permute bytes as specified by GSR.MASK  */

#define BSHUFFLE_OPF	0x04c



#define VIS_OPCODE_MASK	((0x3 << 30) | (0x3f << 19))

#define VIS_OPCODE_VAL	((0x2 << 30) | (0x36 << 19))



#define VIS_OPF_SHIFT	5

#define VIS_OPF_MASK	(0x1ff << VIS_OPF_SHIFT)
@@ -810,9 +807,6 @@ int vis_emul(struct pt_regs *regs, unsigned int insn) 
	if (get_user(insn, (u32 __user *) pc))

		return -EFAULT;



	if ((insn & VIS_OPCODE_MASK) != VIS_OPCODE_VAL)

		return -EINVAL;



	opf = (insn & VIS_OPF_MASK) >> VIS_OPF_SHIFT;

	switch (opf) {

	default: