diff options
| author | Avi Kivity <avi@redhat.com> | 2010-08-26 04:59:00 -0400 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-10-24 04:51:41 -0400 |
| commit | f6b3597bded9ed261b42fdcb5e741489cb5ccbfe (patch) | |
| tree | 9bb21ff6f2da81b4d2cd61ae70f733e04a881672 /arch/x86/kvm/emulate.c | |
| parent | 739ae406068211b235b488f247aab349e486c382 (diff) | |
KVM: x86 emulator: add macros for executing instructions that may trap
Like DIV and IDIV.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/x86/kvm/emulate.c')
| -rw-r--r-- | arch/x86/kvm/emulate.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 58e715cb5172..e96cce170228 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c | |||
| @@ -331,6 +331,27 @@ struct group_dual { | |||
| 331 | "a" (_rax), "d" (_rdx)); \ | 331 | "a" (_rax), "d" (_rdx)); \ |
| 332 | } while (0) | 332 | } while (0) |
| 333 | 333 | ||
| 334 | #define __emulate_1op_rax_rdx_ex(_op, _src, _rax, _rdx, _eflags, _suffix, _ex) \ | ||
| 335 | do { \ | ||
| 336 | unsigned long _tmp; \ | ||
| 337 | \ | ||
| 338 | __asm__ __volatile__ ( \ | ||
| 339 | _PRE_EFLAGS("0", "5", "1") \ | ||
| 340 | "1: \n\t" \ | ||
| 341 | _op _suffix " %6; " \ | ||
| 342 | "2: \n\t" \ | ||
| 343 | _POST_EFLAGS("0", "5", "1") \ | ||
| 344 | ".pushsection .fixup,\"ax\" \n\t" \ | ||
| 345 | "3: movb $1, %4 \n\t" \ | ||
| 346 | "jmp 2b \n\t" \ | ||
| 347 | ".popsection \n\t" \ | ||
| 348 | _ASM_EXTABLE(1b, 3b) \ | ||
| 349 | : "=m" (_eflags), "=&r" (_tmp), \ | ||
| 350 | "+a" (_rax), "+d" (_rdx), "+qm"(_ex) \ | ||
| 351 | : "i" (EFLAGS_MASK), "m" ((_src).val), \ | ||
| 352 | "a" (_rax), "d" (_rdx)); \ | ||
| 353 | } while (0) | ||
| 354 | |||
| 334 | /* instruction has only one source operand, destination is implicit (e.g. mul, div, imul, idiv) */ | 355 | /* instruction has only one source operand, destination is implicit (e.g. mul, div, imul, idiv) */ |
| 335 | #define emulate_1op_rax_rdx(_op, _src, _rax, _rdx, _eflags) \ | 356 | #define emulate_1op_rax_rdx(_op, _src, _rax, _rdx, _eflags) \ |
| 336 | do { \ | 357 | do { \ |
| @@ -342,6 +363,28 @@ struct group_dual { | |||
| 342 | } \ | 363 | } \ |
| 343 | } while (0) | 364 | } while (0) |
| 344 | 365 | ||
| 366 | #define emulate_1op_rax_rdx_ex(_op, _src, _rax, _rdx, _eflags, _ex) \ | ||
| 367 | do { \ | ||
| 368 | switch((_src).bytes) { \ | ||
| 369 | case 1: \ | ||
| 370 | __emulate_1op_rax_rdx_ex(_op, _src, _rax, _rdx, \ | ||
| 371 | _eflags, "b", _ex); \ | ||
| 372 | break; \ | ||
| 373 | case 2: \ | ||
| 374 | __emulate_1op_rax_rdx_ex(_op, _src, _rax, _rdx, \ | ||
| 375 | _eflags, "w", _ex); \ | ||
| 376 | break; \ | ||
| 377 | case 4: \ | ||
| 378 | __emulate_1op_rax_rdx_ex(_op, _src, _rax, _rdx, \ | ||
| 379 | _eflags, "l", _ex); \ | ||
| 380 | break; \ | ||
| 381 | case 8: ON64( \ | ||
| 382 | __emulate_1op_rax_rdx_ex(_op, _src, _rax, _rdx, \ | ||
| 383 | _eflags, "q", _ex)); \ | ||
| 384 | break; \ | ||
| 385 | } \ | ||
| 386 | } while (0) | ||
| 387 | |||
| 345 | /* Fetch next part of the instruction being emulated. */ | 388 | /* Fetch next part of the instruction being emulated. */ |
| 346 | #define insn_fetch(_type, _size, _eip) \ | 389 | #define insn_fetch(_type, _size, _eip) \ |
| 347 | ({ unsigned long _x; \ | 390 | ({ unsigned long _x; \ |