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powerpc/sstep: Introduce macros to retrieve Prefix instruction operands

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retrieve prefix instruction operands RA and pc relative bit R values
using macros and adopt it in sstep.c and test_emulate_step.c.

Signed-off-by: Balamuruhan S <bala24@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200626095158.1031507-4-bala24@linux.ibm.com
This commit is contained in:
Balamuruhan S 2020-06-26 15:21:57 +05:30 committed by Michael Ellerman
parent 7e67c73b93
commit 68a180a44c
2 changed files with 10 additions and 6 deletions
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4
arch/powerpc/include/asm/sstep.h
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@ -104,6 +104,10 @@ enum instruction_type {
#define MKOP(t, f, s) ((t) | (f) | SIZE(s))
/* Prefix instruction operands */
#define GET_PREFIX_RA(i) (((i) >> 16) & 0x1f)
#define GET_PREFIX_R(i) ((i) & (1ul << 20))
struct instruction_op {
int type;
int reg;

12
arch/powerpc/lib/sstep.c
View File

@ -200,8 +200,8 @@ static nokprobe_inline unsigned long mlsd_8lsd_ea(unsigned int instr,
unsigned int dd;
unsigned long ea, d0, d1, d;
prefix_r = instr & (1ul << 20);
ra = (suffix >> 16) & 0x1f;
prefix_r = GET_PREFIX_R(instr);
ra = GET_PREFIX_RA(suffix);
d0 = instr & 0x3ffff;
d1 = suffix & 0xffff;
@ -1339,8 +1339,8 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs,
switch (opcode) {
#ifdef __powerpc64__
case 1:
prefix_r = word & (1ul << 20);
ra = (suffix >> 16) & 0x1f;
prefix_r = GET_PREFIX_R(word);
ra = GET_PREFIX_RA(suffix);
rd = (suffix >> 21) & 0x1f;
op->reg = rd;
op->val = regs->gpr[rd];
@ -2715,8 +2715,8 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs,
}
break;
case 1: /* Prefixed instructions */
prefix_r = word & (1ul << 20);
ra = (suffix >> 16) & 0x1f;
prefix_r = GET_PREFIX_R(word);
ra = GET_PREFIX_RA(suffix);
op->update_reg = ra;
rd = (suffix >> 21) & 0x1f;
op->reg = rd;