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KVM: x86 emulator: Stop passing ctxt->ops as arg of decode helpers

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Dereference it in the actual users: only do_insn_fetch_byte().

This is consistent with the way __linearize() dereferences it.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Takuya Yoshikawa 2011-05-15 00:57:43 +09:00 committed by Avi Kivity
parent 67cbc90db5
commit ef5d75cc9a
1 changed files with 8 additions and 15 deletions
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23
arch/x86/kvm/emulate.c
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@ -655,7 +655,6 @@ static int segmented_read_std(struct x86_emulate_ctxt *ctxt,
}
static int do_insn_fetch_byte(struct x86_emulate_ctxt *ctxt,
struct x86_emulate_ops *ops,
unsigned long eip, u8 *dest)
{
struct fetch_cache *fc = &ctxt->decode.fetch;
@ -670,8 +669,8 @@ static int do_insn_fetch_byte(struct x86_emulate_ctxt *ctxt,
rc = __linearize(ctxt, addr, size, false, true, &linear);
if (rc != X86EMUL_CONTINUE)
return rc;
rc = ops->fetch(ctxt, linear, fc->data + cur_size,
size, &ctxt->exception);
rc = ctxt->ops->fetch(ctxt, linear, fc->data + cur_size,
size, &ctxt->exception);
if (rc != X86EMUL_CONTINUE)
return rc;
fc->end += size;
@ -681,7 +680,6 @@ static int do_insn_fetch_byte(struct x86_emulate_ctxt *ctxt,
}
static int do_insn_fetch(struct x86_emulate_ctxt *ctxt,
struct x86_emulate_ops *ops,
unsigned long eip, void *dest, unsigned size)
{
int rc;
@ -690,7 +688,7 @@ static int do_insn_fetch(struct x86_emulate_ctxt *ctxt,
if (eip + size - ctxt->eip > 15)
return X86EMUL_UNHANDLEABLE;
while (size--) {
rc = do_insn_fetch_byte(ctxt, ops, eip++, dest++);
rc = do_insn_fetch_byte(ctxt, eip++, dest++);
if (rc != X86EMUL_CONTINUE)
return rc;
}
@ -700,7 +698,7 @@ static int do_insn_fetch(struct x86_emulate_ctxt *ctxt,
/* Fetch next part of the instruction being emulated. */
#define insn_fetch(_type, _size, _eip) \
({ unsigned long _x; \
rc = do_insn_fetch(ctxt, ops, (_eip), &_x, (_size)); \
rc = do_insn_fetch(ctxt, (_eip), &_x, (_size)); \
if (rc != X86EMUL_CONTINUE) \
goto done; \
(_eip) += (_size); \
@ -708,7 +706,7 @@ static int do_insn_fetch(struct x86_emulate_ctxt *ctxt,
})
#define insn_fetch_arr(_arr, _size, _eip) \
({ rc = do_insn_fetch(ctxt, ops, (_eip), _arr, (_size)); \
({ rc = do_insn_fetch(ctxt, (_eip), _arr, (_size)); \
if (rc != X86EMUL_CONTINUE) \
goto done; \
(_eip) += (_size); \
@ -887,7 +885,6 @@ static void decode_register_operand(struct x86_emulate_ctxt *ctxt,
}
static int decode_modrm(struct x86_emulate_ctxt *ctxt,
struct x86_emulate_ops *ops,
struct operand *op)
{
struct decode_cache *c = &ctxt->decode;
@ -1014,7 +1011,6 @@ done:
}
static int decode_abs(struct x86_emulate_ctxt *ctxt,
struct x86_emulate_ops *ops,
struct operand *op)
{
struct decode_cache *c = &ctxt->decode;
@ -3327,7 +3323,6 @@ static int decode_imm(struct x86_emulate_ctxt *ctxt, struct operand *op,
unsigned size, bool sign_extension)
{
struct decode_cache *c = &ctxt->decode;
struct x86_emulate_ops *ops = ctxt->ops;
int rc = X86EMUL_CONTINUE;
op->type = OP_IMM;
@ -3362,10 +3357,8 @@ done:
return rc;
}
int
x86_decode_insn(struct x86_emulate_ctxt *ctxt, void *insn, int insn_len)
int x86_decode_insn(struct x86_emulate_ctxt *ctxt, void *insn, int insn_len)
{
struct x86_emulate_ops *ops = ctxt->ops;
struct decode_cache *c = &ctxt->decode;
int rc = X86EMUL_CONTINUE;
int mode = ctxt->mode;
@ -3531,11 +3524,11 @@ done_prefixes:
/* ModRM and SIB bytes. */
if (c->d & ModRM) {
rc = decode_modrm(ctxt, ops, &memop);
rc = decode_modrm(ctxt, &memop);
if (!c->has_seg_override)
set_seg_override(c, c->modrm_seg);
} else if (c->d & MemAbs)
rc = decode_abs(ctxt, ops, &memop);
rc = decode_abs(ctxt, &memop);
if (rc != X86EMUL_CONTINUE)
goto done;