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| author | Denys Vlasenko <dvlasenk@redhat.com> | 2015-09-18 16:53:28 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-09-20 10:19:52 +0200 |
| commit | 4aef363e48177d451b4d263c69dd2c86437e988b (patch) | |
| tree | d2614feb68fe71481f063d3f47d89850c3713fbc /arch/x86/math-emu | |
| parent | 57ca6897cd134efd8914cc230f602abad431c7db (diff) | |
| download | linux-4aef363e48177d451b4d263c69dd2c86437e988b.tar.gz | |
x86/fpu/math-emu: Remove define layer for undocumented opcodes
No code changes. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1442588010-20055-1-git-send-email-dvlasenk@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/math-emu')
| -rw-r--r-- | arch/x86/math-emu/fpu_entry.c | 43 |
1 files changed, 21 insertions, 22 deletions
diff --git a/arch/x86/math-emu/fpu_entry.c b/arch/x86/math-emu/fpu_entry.c index 929b1d500823..65afd46643f0 100644 --- a/arch/x86/math-emu/fpu_entry.c +++ b/arch/x86/math-emu/fpu_entry.c @@ -40,30 +40,29 @@ #define __BAD__ FPU_illegal /* Illegal on an 80486, causes SIGILL */ -/* WARNING: These codes are not documented by Intel in their 80486 manual - and may not work on FPU clones or later Intel FPUs. */ - -/* Changes to support the un-doc codes provided by Linus Torvalds. */ - -#define _d9_d8_ fstp_i /* unofficial code (19) */ -#define _dc_d0_ fcom_st /* unofficial code (14) */ -#define _dc_d8_ fcompst /* unofficial code (1c) */ -#define _dd_c8_ fxch_i /* unofficial code (0d) */ -#define _de_d0_ fcompst /* unofficial code (16) */ -#define _df_c0_ ffreep /* unofficial code (07) ffree + pop */ -#define _df_c8_ fxch_i /* unofficial code (0f) */ -#define _df_d0_ fstp_i /* unofficial code (17) */ -#define _df_d8_ fstp_i /* unofficial code (1f) */ +/* WARNING: "u" entries are not documented by Intel in their 80486 manual + and may not work on FPU clones or later Intel FPUs. + Changes to support them provided by Linus Torvalds. */ static FUNC const st_instr_table[64] = { - fadd__, fld_i_, __BAD__, __BAD__, fadd_i, ffree_, faddp_, _df_c0_, - fmul__, fxch_i, __BAD__, __BAD__, fmul_i, _dd_c8_, fmulp_, _df_c8_, - fcom_st, fp_nop, __BAD__, __BAD__, _dc_d0_, fst_i_, _de_d0_, _df_d0_, - fcompst, _d9_d8_, __BAD__, __BAD__, _dc_d8_, fstp_i, fcompp, _df_d8_, - fsub__, FPU_etc, __BAD__, finit_, fsubri, fucom_, fsubrp, fstsw_, - fsubr_, fconst, fucompp, __BAD__, fsub_i, fucomp, fsubp_, __BAD__, - fdiv__, FPU_triga, __BAD__, __BAD__, fdivri, __BAD__, fdivrp, __BAD__, - fdivr_, FPU_trigb, __BAD__, __BAD__, fdiv_i, __BAD__, fdivp_, __BAD__, +/* Opcode: d8 d9 da db */ +/* dc dd de df */ +/* c0..7 */ fadd__, fld_i_, __BAD__, __BAD__, +/* c0..7 */ fadd_i, ffree_, faddp_, ffreep,/*u*/ +/* c8..f */ fmul__, fxch_i, __BAD__, __BAD__, +/* c8..f */ fmul_i, fxch_i,/*u*/ fmulp_, fxch_i,/*u*/ +/* d0..7 */ fcom_st, fp_nop, __BAD__, __BAD__, +/* d0..7 */ fcom_st,/*u*/ fst_i_, fcompst,/*u*/ fstp_i,/*u*/ +/* d8..f */ fcompst, fstp_i,/*u*/ __BAD__, __BAD__, +/* d8..f */ fcompst,/*u*/ fstp_i, fcompp, fstp_i,/*u*/ +/* e0..7 */ fsub__, FPU_etc, __BAD__, finit_, +/* e0..7 */ fsubri, fucom_, fsubrp, fstsw_, +/* e8..f */ fsubr_, fconst, fucompp, __BAD__, +/* e8..f */ fsub_i, fucomp, fsubp_, __BAD__, +/* f0..7 */ fdiv__, FPU_triga, __BAD__, __BAD__, +/* f0..7 */ fdivri, __BAD__, fdivrp, __BAD__, +/* f8..f */ fdivr_, FPU_trigb, __BAD__, __BAD__, +/* f8..f */ fdiv_i, __BAD__, fdivp_, __BAD__, }; #define _NONE_ 0 /* Take no special action */ |