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MIPS: kernel: Prepare the JR instruction for emulation on MIPS R6

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The MIPS R6 JR instruction is an alias to the JALR one, so it may
need emulation for non-R6 userlands.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
This commit is contained in:
Markos Chandras
2014-11-25 15:54:14 +00:00
parent b5ad2c2193
commit 5f9f41c474
3 changed files with 15 additions and 2 deletions
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arch/mips/include/asm/branch.h
+3
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@@ -13,6 +13,9 @@
#include <asm/ptrace.h>
#include <asm/inst.h>
static int mipsr2_emulation = 0;
#define NO_R6EMU (cpu_has_mips_r6 && !mipsr2_emulation)
extern int __isa_exception_epc(struct pt_regs *regs);
extern int __compute_return_epc(struct pt_regs *regs);
extern int __compute_return_epc_for_insn(struct pt_regs *regs,