diff options
| author | Paul Mackerras <paulus@ozlabs.org> | 2017-08-30 14:12:39 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-09-01 16:42:41 +1000 |
| commit | a53d5182e24c22986ad0e99e52f8fe343ee7d7ac (patch) | |
| tree | 83ef99241cf94c354d014bc343c3a8e3b493cf57 /arch/powerpc/include | |
| parent | d955189ae42796621fb439e5e778ccaeebc2a1e7 (diff) | |
| download | linux-a53d5182e24c22986ad0e99e52f8fe343ee7d7ac.tar.bz2 | |
powerpc: Separate out load/store emulation into its own function
This moves the parts of emulate_step() that deal with emulating
load and store instructions into a new function called
emulate_loadstore(). This is to make it possible to reuse this
code in the alignment handler.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/sstep.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/sstep.h b/arch/powerpc/include/asm/sstep.h index 958c2c55bcfe..309d1c5de143 100644 --- a/arch/powerpc/include/asm/sstep.h +++ b/arch/powerpc/include/asm/sstep.h @@ -152,6 +152,15 @@ void emulate_update_regs(struct pt_regs *reg, struct instruction_op *op); */ extern int emulate_step(struct pt_regs *regs, unsigned int instr); +/* + * Emulate a load or store instruction by reading/writing the + * memory of the current process. FP/VMX/VSX registers are assumed + * to hold live values if the appropriate enable bit in regs->msr is + * set; otherwise this will use the saved values in the thread struct + * for user-mode accesses. + */ +extern int emulate_loadstore(struct pt_regs *regs, struct instruction_op *op); + extern void emulate_vsx_load(struct instruction_op *op, union vsx_reg *reg, const void *mem, bool cross_endian); extern void emulate_vsx_store(struct instruction_op *op, |