diff options
| author | Avi Kivity <avi@redhat.com> | 2011-09-13 11:45:40 +0400 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-09-25 20:52:47 +0400 |
| commit | f09ed83e211d253809e575e05bd4de1e335c0cb2 (patch) | |
| tree | bb769d8d7375b457e70adadb121663af43186561 | |
| parent | 3329ece161ad65ea31d825720e270f3a79ebba92 (diff) | |
| download | linux-f09ed83e211d253809e575e05bd4de1e335c0cb2.tar.xz | |
KVM: x86 emulator: move memop, memopp into emulation context
Simplifies further generalization of decode.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| -rw-r--r-- | arch/x86/include/asm/kvm_emulate.h | 2 | ||||
| -rw-r--r-- | arch/x86/kvm/emulate.c | 34 |
2 files changed, 19 insertions, 17 deletions
diff --git a/arch/x86/include/asm/kvm_emulate.h b/arch/x86/include/asm/kvm_emulate.h index 6040d115ef51..56bac3e3423e 100644 --- a/arch/x86/include/asm/kvm_emulate.h +++ b/arch/x86/include/asm/kvm_emulate.h @@ -275,6 +275,8 @@ struct x86_emulate_ctxt { unsigned long _eip; /* Fields above regs are cleared together. */ unsigned long regs[NR_VCPU_REGS]; + struct operand memop; + struct operand *memopp; struct fetch_cache fetch; struct read_cache io_read; struct read_cache mem_read; diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index ed819bdf475d..58172fb9a09a 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -3323,8 +3323,9 @@ int x86_decode_insn(struct x86_emulate_ctxt *ctxt, void *insn, int insn_len) int def_op_bytes, def_ad_bytes, goffset, simd_prefix; bool op_prefix = false; struct opcode opcode; - struct operand memop = { .type = OP_NONE }, *memopp = NULL; + ctxt->memop.type = OP_NONE; + ctxt->memopp = NULL; ctxt->_eip = ctxt->eip; ctxt->fetch.start = ctxt->_eip; ctxt->fetch.end = ctxt->fetch.start + insn_len; @@ -3482,21 +3483,21 @@ done_prefixes: /* ModRM and SIB bytes. */ if (ctxt->d & ModRM) { - rc = decode_modrm(ctxt, &memop); + rc = decode_modrm(ctxt, &ctxt->memop); if (!ctxt->has_seg_override) set_seg_override(ctxt, ctxt->modrm_seg); } else if (ctxt->d & MemAbs) - rc = decode_abs(ctxt, &memop); + rc = decode_abs(ctxt, &ctxt->memop); if (rc != X86EMUL_CONTINUE) goto done; if (!ctxt->has_seg_override) set_seg_override(ctxt, VCPU_SREG_DS); - memop.addr.mem.seg = seg_override(ctxt); + ctxt->memop.addr.mem.seg = seg_override(ctxt); - if (memop.type == OP_MEM && ctxt->ad_bytes != 8) - memop.addr.mem.ea = (u32)memop.addr.mem.ea; + if (ctxt->memop.type == OP_MEM && ctxt->ad_bytes != 8) + ctxt->memop.addr.mem.ea = (u32)ctxt->memop.addr.mem.ea; /* * Decode and fetch the source operand: register, memory @@ -3509,17 +3510,16 @@ done_prefixes: decode_register_operand(ctxt, &ctxt->src, 0); break; case SrcMem16: - memop.bytes = 2; + ctxt->memop.bytes = 2; goto srcmem_common; case SrcMem32: - memop.bytes = 4; + ctxt->memop.bytes = 4; goto srcmem_common; case SrcMem: - memop.bytes = (ctxt->d & ByteOp) ? 1 : - ctxt->op_bytes; + ctxt->memop.bytes = (ctxt->d & ByteOp) ? 1 : ctxt->op_bytes; srcmem_common: - ctxt->src = memop; - memopp = &ctxt->src; + ctxt->src = ctxt->memop; + ctxt->memopp = &ctxt->src; break; case SrcImmU16: rc = decode_imm(ctxt, &ctxt->src, 2, false); @@ -3561,7 +3561,7 @@ done_prefixes: insn_fetch_arr(ctxt->src.valptr, ctxt->src.bytes, ctxt); break; case SrcMemFAddr: - memop.bytes = ctxt->op_bytes + 2; + ctxt->memop.bytes = ctxt->op_bytes + 2; goto srcmem_common; break; case SrcDX: @@ -3615,8 +3615,8 @@ done_prefixes: break; case DstMem: case DstMem64: - ctxt->dst = memop; - memopp = &ctxt->dst; + ctxt->dst = ctxt->memop; + ctxt->memopp = &ctxt->dst; if ((ctxt->d & DstMask) == DstMem64) ctxt->dst.bytes = 8; else @@ -3654,8 +3654,8 @@ done_prefixes: } done: - if (memopp && memopp->type == OP_MEM && ctxt->rip_relative) - memopp->addr.mem.ea += ctxt->_eip; + if (ctxt->memopp && ctxt->memopp->type == OP_MEM && ctxt->rip_relative) + ctxt->memopp->addr.mem.ea += ctxt->_eip; return (rc != X86EMUL_CONTINUE) ? EMULATION_FAILED : EMULATION_OK; } |