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author | Avi Kivity <avi@redhat.com> | 2011-09-07 16:41:35 +0300 |
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committer | Avi Kivity <avi@redhat.com> | 2011-09-25 19:52:32 +0300 |
commit | a31b9ceadb61487042dec92f662736ccddadc75f (patch) | |
tree | ff5d289f81bd302b085d1bef991f5e32924433eb /arch/x86 | |
parent | 821246a5a548858c78a5e8860862e91c9e035d6b (diff) | |
download | linux-stable-a31b9ceadb61487042dec92f662736ccddadc75f.tar.gz linux-stable-a31b9ceadb61487042dec92f662736ccddadc75f.tar.bz2 linux-stable-a31b9ceadb61487042dec92f662736ccddadc75f.zip |
KVM: x86 emulator: simplify emulate_2op_SrcV()
emulate_2op_SrcV(), and its siblings, emulate_2op_SrcV_nobyte()
and emulate_2op_SrcB(), all use the same calling conventions
and all get passed exactly the same parameters. Simplify them
by passing just the emulation context.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/x86')
-rw-r--r-- | arch/x86/kvm/emulate.c | 90 |
1 files changed, 44 insertions, 46 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index fe5eb6d9b3e1..458914d0f4b0 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -205,64 +205,62 @@ struct gprefix { #define ON64(x) #endif -#define ____emulate_2op(_op, _src, _dst, _eflags, _x, _y, _suffix, _dsttype) \ +#define ____emulate_2op(ctxt, _op, _x, _y, _suffix, _dsttype) \ do { \ __asm__ __volatile__ ( \ _PRE_EFLAGS("0", "4", "2") \ _op _suffix " %"_x"3,%1; " \ _POST_EFLAGS("0", "4", "2") \ - : "=m" (_eflags), "+q" (*(_dsttype*)&(_dst).val),\ + : "=m" ((ctxt)->eflags), \ + "+q" (*(_dsttype*)&(ctxt)->dst.val), \ "=&r" (_tmp) \ - : _y ((_src).val), "i" (EFLAGS_MASK)); \ + : _y ((ctxt)->src.val), "i" (EFLAGS_MASK)); \ } while (0) /* Raw emulation: instruction has two explicit operands. */ -#define __emulate_2op_nobyte(_op,_src,_dst,_eflags,_wx,_wy,_lx,_ly,_qx,_qy) \ +#define __emulate_2op_nobyte(ctxt,_op,_wx,_wy,_lx,_ly,_qx,_qy) \ do { \ unsigned long _tmp; \ \ - switch ((_dst).bytes) { \ + switch ((ctxt)->dst.bytes) { \ case 2: \ - ____emulate_2op(_op,_src,_dst,_eflags,_wx,_wy,"w",u16);\ + ____emulate_2op(ctxt,_op,_wx,_wy,"w",u16); \ break; \ case 4: \ - ____emulate_2op(_op,_src,_dst,_eflags,_lx,_ly,"l",u32);\ + ____emulate_2op(ctxt,_op,_lx,_ly,"l",u32); \ break; \ case 8: \ - ON64(____emulate_2op(_op,_src,_dst,_eflags,_qx,_qy,"q",u64)); \ + ON64(____emulate_2op(ctxt,_op,_qx,_qy,"q",u64)); \ break; \ } \ } while (0) -#define __emulate_2op(_op,_src,_dst,_eflags,_bx,_by,_wx,_wy,_lx,_ly,_qx,_qy) \ +#define __emulate_2op(ctxt,_op,_bx,_by,_wx,_wy,_lx,_ly,_qx,_qy) \ do { \ unsigned long _tmp; \ - switch ((_dst).bytes) { \ + switch ((ctxt)->dst.bytes) { \ case 1: \ - ____emulate_2op(_op,_src,_dst,_eflags,_bx,_by,"b",u8); \ + ____emulate_2op(ctxt,_op,_bx,_by,"b",u8); \ break; \ default: \ - __emulate_2op_nobyte(_op, _src, _dst, _eflags, \ + __emulate_2op_nobyte(ctxt, _op, \ _wx, _wy, _lx, _ly, _qx, _qy); \ break; \ } \ } while (0) /* Source operand is byte-sized and may be restricted to just %cl. */ -#define emulate_2op_SrcB(_op, _src, _dst, _eflags) \ - __emulate_2op(_op, _src, _dst, _eflags, \ - "b", "c", "b", "c", "b", "c", "b", "c") +#define emulate_2op_SrcB(ctxt, _op) \ + __emulate_2op(ctxt, _op, "b", "c", "b", "c", "b", "c", "b", "c") /* Source operand is byte, word, long or quad sized. */ -#define emulate_2op_SrcV(_op, _src, _dst, _eflags) \ - __emulate_2op(_op, _src, _dst, _eflags, \ - "b", "q", "w", "r", _LO32, "r", "", "r") +#define emulate_2op_SrcV(ctxt, _op) \ + __emulate_2op(ctxt, _op, "b", "q", "w", "r", _LO32, "r", "", "r") /* Source operand is word, long or quad sized. */ -#define emulate_2op_SrcV_nobyte(_op, _src, _dst, _eflags) \ - __emulate_2op_nobyte(_op, _src, _dst, _eflags, \ - "w", "r", _LO32, "r", "", "r") +#define emulate_2op_SrcV_nobyte(ctxt, _op) \ + __emulate_2op_nobyte(ctxt, _op, "w", "r", _LO32, "r", "", "r") /* Instruction has three operands and one operand is stored in ECX register */ #define __emulate_2op_cl(_op, _cl, _src, _dst, _eflags, _suffix, _type) \ @@ -1681,26 +1679,26 @@ static int em_grp2(struct x86_emulate_ctxt *ctxt) { switch (ctxt->modrm_reg) { case 0: /* rol */ - emulate_2op_SrcB("rol", ctxt->src, ctxt->dst, ctxt->eflags); + emulate_2op_SrcB(ctxt, "rol"); break; case 1: /* ror */ - emulate_2op_SrcB("ror", ctxt->src, ctxt->dst, ctxt->eflags); + emulate_2op_SrcB(ctxt, "ror"); break; case 2: /* rcl */ - emulate_2op_SrcB("rcl", ctxt->src, ctxt->dst, ctxt->eflags); + emulate_2op_SrcB(ctxt, "rcl"); break; case 3: /* rcr */ - emulate_2op_SrcB("rcr", ctxt->src, ctxt->dst, ctxt->eflags); + emulate_2op_SrcB(ctxt, "rcr"); break; case 4: /* sal/shl */ case 6: /* sal/shl */ - emulate_2op_SrcB("sal", ctxt->src, ctxt->dst, ctxt->eflags); + emulate_2op_SrcB(ctxt, "sal"); break; case 5: /* shr */ - emulate_2op_SrcB("shr", ctxt->src, ctxt->dst, ctxt->eflags); + emulate_2op_SrcB(ctxt, "shr"); break; case 7: /* sar */ - emulate_2op_SrcB("sar", ctxt->src, ctxt->dst, ctxt->eflags); + emulate_2op_SrcB(ctxt, "sar"); break; } return X86EMUL_CONTINUE; @@ -1714,7 +1712,7 @@ static int em_grp3(struct x86_emulate_ctxt *ctxt) switch (ctxt->modrm_reg) { case 0 ... 1: /* test */ - emulate_2op_SrcV("test", ctxt->src, ctxt->dst, ctxt->eflags); + emulate_2op_SrcV(ctxt, "test"); break; case 2: /* not */ ctxt->dst.val = ~ctxt->dst.val; @@ -2459,7 +2457,7 @@ static int em_das(struct x86_emulate_ctxt *ctxt) ctxt->src.type = OP_IMM; ctxt->src.val = 0; ctxt->src.bytes = 1; - emulate_2op_SrcV("or", ctxt->src, ctxt->dst, ctxt->eflags); + emulate_2op_SrcV(ctxt, "or"); ctxt->eflags &= ~(X86_EFLAGS_AF | X86_EFLAGS_CF); if (cf) ctxt->eflags |= X86_EFLAGS_CF; @@ -2509,49 +2507,49 @@ static int em_ret_near_imm(struct x86_emulate_ctxt *ctxt) static int em_add(struct x86_emulate_ctxt *ctxt) { - emulate_2op_SrcV("add", ctxt->src, ctxt->dst, ctxt->eflags); + emulate_2op_SrcV(ctxt, "add"); return X86EMUL_CONTINUE; } static int em_or(struct x86_emulate_ctxt *ctxt) { - emulate_2op_SrcV("or", ctxt->src, ctxt->dst, ctxt->eflags); + emulate_2op_SrcV(ctxt, "or"); return X86EMUL_CONTINUE; } static int em_adc(struct x86_emulate_ctxt *ctxt) { - emulate_2op_SrcV("adc", ctxt->src, ctxt->dst, ctxt->eflags); + emulate_2op_SrcV(ctxt, "adc"); return X86EMUL_CONTINUE; } static int em_sbb(struct x86_emulate_ctxt *ctxt) { - emulate_2op_SrcV("sbb", ctxt->src, ctxt->dst, ctxt->eflags); + emulate_2op_SrcV(ctxt, "sbb"); return X86EMUL_CONTINUE; } static int em_and(struct x86_emulate_ctxt *ctxt) { - emulate_2op_SrcV("and", ctxt->src, ctxt->dst, ctxt->eflags); + emulate_2op_SrcV(ctxt, "and"); return X86EMUL_CONTINUE; } static int em_sub(struct x86_emulate_ctxt *ctxt) { - emulate_2op_SrcV("sub", ctxt->src, ctxt->dst, ctxt->eflags); + emulate_2op_SrcV(ctxt, "sub"); return X86EMUL_CONTINUE; } static int em_xor(struct x86_emulate_ctxt *ctxt) { - emulate_2op_SrcV("xor", ctxt->src, ctxt->dst, ctxt->eflags); + emulate_2op_SrcV(ctxt, "xor"); return X86EMUL_CONTINUE; } static int em_cmp(struct x86_emulate_ctxt *ctxt) { - emulate_2op_SrcV("cmp", ctxt->src, ctxt->dst, ctxt->eflags); + emulate_2op_SrcV(ctxt, "cmp"); /* Disable writeback. */ ctxt->dst.type = OP_NONE; return X86EMUL_CONTINUE; @@ -2559,7 +2557,7 @@ static int em_cmp(struct x86_emulate_ctxt *ctxt) static int em_test(struct x86_emulate_ctxt *ctxt) { - emulate_2op_SrcV("test", ctxt->src, ctxt->dst, ctxt->eflags); + emulate_2op_SrcV(ctxt, "test"); return X86EMUL_CONTINUE; } @@ -2577,7 +2575,7 @@ static int em_xchg(struct x86_emulate_ctxt *ctxt) static int em_imul(struct x86_emulate_ctxt *ctxt) { - emulate_2op_SrcV_nobyte("imul", ctxt->src, ctxt->dst, ctxt->eflags); + emulate_2op_SrcV_nobyte(ctxt, "imul"); return X86EMUL_CONTINUE; } @@ -4121,7 +4119,7 @@ twobyte_insn: ctxt->dst.type = OP_NONE; /* only subword offset */ ctxt->src.val &= (ctxt->dst.bytes << 3) - 1; - emulate_2op_SrcV_nobyte("bt", ctxt->src, ctxt->dst, ctxt->eflags); + emulate_2op_SrcV_nobyte(ctxt, "bt"); break; case 0xa4: /* shld imm8, r, r/m */ case 0xa5: /* shld cl, r, r/m */ @@ -4135,7 +4133,7 @@ twobyte_insn: break; case 0xab: bts: /* bts */ - emulate_2op_SrcV_nobyte("bts", ctxt->src, ctxt->dst, ctxt->eflags); + emulate_2op_SrcV_nobyte(ctxt, "bts"); break; case 0xac: /* shrd imm8, r, r/m */ case 0xad: /* shrd cl, r, r/m */ @@ -4150,7 +4148,7 @@ twobyte_insn: */ ctxt->src.orig_val = ctxt->src.val; ctxt->src.val = ctxt->regs[VCPU_REGS_RAX]; - emulate_2op_SrcV("cmp", ctxt->src, ctxt->dst, ctxt->eflags); + emulate_2op_SrcV(ctxt, "cmp"); if (ctxt->eflags & EFLG_ZF) { /* Success: write back to memory. */ ctxt->dst.val = ctxt->src.orig_val; @@ -4165,7 +4163,7 @@ twobyte_insn: break; case 0xb3: btr: /* btr */ - emulate_2op_SrcV_nobyte("btr", ctxt->src, ctxt->dst, ctxt->eflags); + emulate_2op_SrcV_nobyte(ctxt, "btr"); break; case 0xb4: /* lfs */ rc = emulate_load_segment(ctxt, VCPU_SREG_FS); @@ -4192,7 +4190,7 @@ twobyte_insn: break; case 0xbb: btc: /* btc */ - emulate_2op_SrcV_nobyte("btc", ctxt->src, ctxt->dst, ctxt->eflags); + emulate_2op_SrcV_nobyte(ctxt, "btc"); break; case 0xbc: { /* bsf */ u8 zf; @@ -4224,7 +4222,7 @@ twobyte_insn: (s16) ctxt->src.val; break; case 0xc0 ... 0xc1: /* xadd */ - emulate_2op_SrcV("add", ctxt->src, ctxt->dst, ctxt->eflags); + emulate_2op_SrcV(ctxt, "add"); /* Write back the register source. */ ctxt->src.val = ctxt->dst.orig_val; write_register_operand(&ctxt->src); |